This document is a curriculum vitae for Jan van Stam that lists 43 publications. It provides information on his h-index of 20, i10 index of 34, and other citation metrics. It then lists each of his 43 publications with the title, co-authors, journal/book, year, and number of citations for each. The publications span the years 1986 to 2001 and cover topics related to fluorescence spectroscopy studies of micelles, polymers, and molecular complexes/aggregates in solution.
Ponent: Francesc Piferrer (ICM - CSIC)
Abstract: La proporció de sexes és un paràmetre fonamental en la demografia de les poblacions. Es presenta el coneixement que actualment es té sobre els mecanismes moleculars que la determinen i com en molts casos hi ha una participació combinada d’elements genètics i factors ambientals. La epigenètica integra la informació genòmica amb la ambiental i és la base de la plasticitat fenotípica Es repassen breument els principals mecanismes epigenètics i diferents mètodes per a avaluar canvis en la metilació del DNA. Seguidament, es presenten exemples de com la epigenètica pot contribuir en la recerca en ecologia i, de passada, en la producció animal. Per acabar, mostrarem alguns exemples de recerca en epigenòmica en poblacions naturals de les Illes Medes, de com petites variacions en les condicions ambientals al principi de la vida tenen conseqüències a llarg termini, i discutirem breument aspectes adaptatius en un context de canvi global.
This document describes a meta-analysis of studies examining the effect of metal contamination on litter decomposition in streams. The meta-analysis included 133 comparisons from 38 studies. It found that metal contamination strongly inhibits litter decomposition, with an effect size of -0.813. The inhibition effect has become more precisely estimated over the past 10 years as evidence has accumulated. The magnitude of inhibition differs depending on the type of metal, origin of contamination, pH, and litter properties. Future research should further investigate the role of litter and communities in moderating the response, and examine multiple stressors including nanometals.
Determinar la toxicitat dels sediments en els ecosistemes aquàtics és un repte, i és necessari per a una adequada avaluació del risc toxicològic en aquests ecosistemes. En les darreres dècades s’han estudiat i aplicat diferents eines (ex. tests de laboratori amb diferents concentracions, tests amb l’aigua intersticial, estudis de bioacumulació, índexs de toxicitat). Actualment es recomana l'aplicació conjunta d'eines químiques, ecològiques i toxicològiques per a una adequada avaluació. En aquest treball utilitzem l’aproximació de les Toxic Units, tests de toxicitat amb l’aigua intersticial (Vibrio fischeri, Pseudokirchneriella subcapitata i Daphnia magna) i tests d'exposició amb el sediment (V. fischeri, Chironomus riparius), juntament amb l’estudi de la comunitat d'invertebrats, per detectar respostes a curt i llarg termini en quatre rius de la Península Ibèrica: el Llobregat, l’Ebre, el Xúquer i el Guadalquivir.
by Núria de Castro-Català, Maja Kuzmanovic, Neus Roig, Jordi Sierra, Antoni Ginebreda, Damià Barceló, Sandra Pérez, Mira Petrovic, Yolanda Picó, Marta Schumacher and Isabel Muñoz
Non-Invasive Methods for Biomonitoring Trace Element ExposureChris Harrington
Finger and toe nails don't seem very interesting at the best of times, but did you know they carry a record of your exposure to metals like lead and arsenic?
In this presentation I review how these materials can show if people are being exposed to trace metals and how they can be used to link exposure to possible early health effects.
The talk includes work from 3 PhD projects that I have been involved in and show how a project can develop from a humble beginning to cutting edge research.
Jeffrey J. Whyte is a researcher who has published extensively on topics related to swine genetics, cloning, and using pig models for human diseases. Some of his publications include studies looking at using zinc finger nucleases and CRISPR to genetically modify pigs, producing cloned knockout pig models, and investigating cytokines and placental development in pigs. He has also researched using pig models to study cardiovascular conditions in humans.
This study examined the effects of arsenic exposure on eavesdropping behavior in female Betta splendens (Siamese fighting fish). Female fish were exposed to 0 ppb, 10 ppb, or 100 ppb of arsenic. During eavesdropping trials, all females spent more time near interacting males, indicating they were eavesdropping. Males exposed to higher arsenic levels displayed less aggression. During subsequent mate choice trials, exposed females did not spend more time near the winner of male interactions, suggesting arsenic may impair their ability to retain information gained from eavesdropping. The study aims to understand how environmental pollutants like arsenic impact important fish behaviors.
Edri And Regev 2009 “Shaken, Not Stable”: Dispersion Mechanism and Dynami...edrier
This study examines the dispersion dynamics of single-walled carbon nanotubes (SWNTs) stabilized by bovine serum albumin (BSA) protein. The researchers investigated how BSA properties like charge and conformation affect SWNT exfoliation during sonication and subsequent recovery after centrifugation. They found that bulkier BSA conformations led to faster exfoliation and higher SWNT recovery, while higher BSA-to-SWNT ratios resulted in slower exfoliation dynamics and lower recoveries. The study links the unstable state during sonication to the stable state achieved after centrifugation removal of bundles and impurities.
Ponent: Francesc Piferrer (ICM - CSIC)
Abstract: La proporció de sexes és un paràmetre fonamental en la demografia de les poblacions. Es presenta el coneixement que actualment es té sobre els mecanismes moleculars que la determinen i com en molts casos hi ha una participació combinada d’elements genètics i factors ambientals. La epigenètica integra la informació genòmica amb la ambiental i és la base de la plasticitat fenotípica Es repassen breument els principals mecanismes epigenètics i diferents mètodes per a avaluar canvis en la metilació del DNA. Seguidament, es presenten exemples de com la epigenètica pot contribuir en la recerca en ecologia i, de passada, en la producció animal. Per acabar, mostrarem alguns exemples de recerca en epigenòmica en poblacions naturals de les Illes Medes, de com petites variacions en les condicions ambientals al principi de la vida tenen conseqüències a llarg termini, i discutirem breument aspectes adaptatius en un context de canvi global.
This document describes a meta-analysis of studies examining the effect of metal contamination on litter decomposition in streams. The meta-analysis included 133 comparisons from 38 studies. It found that metal contamination strongly inhibits litter decomposition, with an effect size of -0.813. The inhibition effect has become more precisely estimated over the past 10 years as evidence has accumulated. The magnitude of inhibition differs depending on the type of metal, origin of contamination, pH, and litter properties. Future research should further investigate the role of litter and communities in moderating the response, and examine multiple stressors including nanometals.
Determinar la toxicitat dels sediments en els ecosistemes aquàtics és un repte, i és necessari per a una adequada avaluació del risc toxicològic en aquests ecosistemes. En les darreres dècades s’han estudiat i aplicat diferents eines (ex. tests de laboratori amb diferents concentracions, tests amb l’aigua intersticial, estudis de bioacumulació, índexs de toxicitat). Actualment es recomana l'aplicació conjunta d'eines químiques, ecològiques i toxicològiques per a una adequada avaluació. En aquest treball utilitzem l’aproximació de les Toxic Units, tests de toxicitat amb l’aigua intersticial (Vibrio fischeri, Pseudokirchneriella subcapitata i Daphnia magna) i tests d'exposició amb el sediment (V. fischeri, Chironomus riparius), juntament amb l’estudi de la comunitat d'invertebrats, per detectar respostes a curt i llarg termini en quatre rius de la Península Ibèrica: el Llobregat, l’Ebre, el Xúquer i el Guadalquivir.
by Núria de Castro-Català, Maja Kuzmanovic, Neus Roig, Jordi Sierra, Antoni Ginebreda, Damià Barceló, Sandra Pérez, Mira Petrovic, Yolanda Picó, Marta Schumacher and Isabel Muñoz
Non-Invasive Methods for Biomonitoring Trace Element ExposureChris Harrington
Finger and toe nails don't seem very interesting at the best of times, but did you know they carry a record of your exposure to metals like lead and arsenic?
In this presentation I review how these materials can show if people are being exposed to trace metals and how they can be used to link exposure to possible early health effects.
The talk includes work from 3 PhD projects that I have been involved in and show how a project can develop from a humble beginning to cutting edge research.
Jeffrey J. Whyte is a researcher who has published extensively on topics related to swine genetics, cloning, and using pig models for human diseases. Some of his publications include studies looking at using zinc finger nucleases and CRISPR to genetically modify pigs, producing cloned knockout pig models, and investigating cytokines and placental development in pigs. He has also researched using pig models to study cardiovascular conditions in humans.
This study examined the effects of arsenic exposure on eavesdropping behavior in female Betta splendens (Siamese fighting fish). Female fish were exposed to 0 ppb, 10 ppb, or 100 ppb of arsenic. During eavesdropping trials, all females spent more time near interacting males, indicating they were eavesdropping. Males exposed to higher arsenic levels displayed less aggression. During subsequent mate choice trials, exposed females did not spend more time near the winner of male interactions, suggesting arsenic may impair their ability to retain information gained from eavesdropping. The study aims to understand how environmental pollutants like arsenic impact important fish behaviors.
Edri And Regev 2009 “Shaken, Not Stable”: Dispersion Mechanism and Dynami...edrier
This study examines the dispersion dynamics of single-walled carbon nanotubes (SWNTs) stabilized by bovine serum albumin (BSA) protein. The researchers investigated how BSA properties like charge and conformation affect SWNT exfoliation during sonication and subsequent recovery after centrifugation. They found that bulkier BSA conformations led to faster exfoliation and higher SWNT recovery, while higher BSA-to-SWNT ratios resulted in slower exfoliation dynamics and lower recoveries. The study links the unstable state during sonication to the stable state achieved after centrifugation removal of bundles and impurities.
This document summarizes a report commissioned by the World Bank on options for low-carbon power sector regulation in China. It provides recommendations in six key areas: 1) Clarifying and coordinating power sector planning processes to integrate environmental goals; 2) Expanding energy efficiency obligations on grid companies; 3) Implementing a merit order approach to generator operations that incorporates emissions costs; 4) Expanding renewable energy targets and supporting policies; 5) Reforming retail pricing; and 6) Implementing emissions pricing. The recommendations aim to support China's goals of reducing carbon emissions, coal consumption, and improving air quality in the power sector.
Ronnie Terry has over 7 years of experience in IT security support, server support management, networking, and datacenter support. He currently works as a senior network engineer and administrator at Associated Medical Professionals of Central New York where he oversees network administration and maintenance. Prior to this role, he held several other network engineering and support roles for medical organizations in New York.
This short document promotes creating presentations using Haiku Deck, a tool for making slideshows. It encourages the reader to get started making their own Haiku Deck presentation and sharing it on SlideShare. In just one sentence, it pitches the idea of using Haiku Deck to easily create engaging slideshow presentations.
2015 PowerPoint Pres. Lunch & Learn (1) copyNorma B. Felix
This document provides information about Garden Art International, a company that manufactures custom cast garden art and planters. Some key points:
- They can custom design and manufacture a wide variety of garden art pieces in fiberglass or GFRC (glass fiber reinforced concrete) in various styles, colors, textures, and sizes.
- In addition to planters and urns, they produce trash/recycling receptacles, fire tables, fountains, and other garden décor.
- They can replicate existing pieces or create new custom designs. Materials are durable and weather resistant.
- The company is known for its hand-applied finishes that replicate various textures like stone, metal, and wood grain
This document describes billing plans in SAP. It discusses the different types of billing plans including periodic billing which is used for rental contracts, and milestone billing which is used to distribute amounts over billing dates based on project milestones. It describes how billing plans are controlled through billing plan types, date categories, and assigning billing plan types to items. Key functions of billing plans are also summarized such as automatic creation of dates, pricing, billing blocks, and document flow.
- The document describes billing plans, which define schedules of billing dates for items in sales documents. There are two main types of billing plans: periodic billing, which bills a total amount on set dates, and milestone billing, which distributes amounts over dates linked to project milestones.
- Billing plans are controlled through billing plan types, date categories, and date descriptions defined in customizing. These determine how dates are automatically set and what data is associated with each date.
- Periodic billing typically uses monthly or quarterly intervals between set dates. Milestone billing links dates to percentages of project completion or amounts upon reaching project milestones.
Risk assessment and management during food preparationaleeban_irasna
About the challenges reagarding food safety,risk analysis, risk assessment and principles of food safety management in food industry. Also contains the case study of Listeria monocytogenes in Deli meats
This document lists 37 publications by Jochem Struppe from 1993 to 2015. The publications cover a range of topics studied using solid-state NMR techniques including molecular motions in liquid crystals, lipid bilayers, membrane-associated peptides, and cannabinoid receptors. Many of the publications involve collaborations and applications of new NMR methods to biological questions.
B. Zhao paper2-JACS 2005.water soluble SWNTbinzhao2004
This document summarizes the synthesis and characterization of two water-soluble single-walled carbon nanotube (SWNT) graft copolymers. Specifically, poly(aminobenzene sulfonic acid) (PABS) and polyethylene glycol (PEG) were covalently attached to SWNTs to create SWNT-PABS and SWNT-PEG copolymers. Quantitative studies found the copolymers had water solubility of about 5 mg/mL. Thermogravimetric analysis estimated the SWNT loading to be 30% for SWNT-PABS and 71% for SWNT-PEG. Spectroscopic studies showed SWNT-P
This document contains 59 references to scientific papers on a variety of topics related to fluid dynamics, heat transfer, evaporation, cavitation, and water treatment. The references cover experimental and computational studies of topics such as nanobubbles, droplet evaporation, pool boiling, fluid-fluid separation processes, and hydraulic power generation.
Electronic Switching of Single Silicon Atoms by Molecular Field Effectsioneec
We have observed on-off switching of scanning tunneling microscope current flow to silicon
adatoms of the Si(111)-(7 7) surface that are enclosed within a bistable dimeric corral of self-assembled
chlorododecane molecules. These thermally activated oscillations amounted to an order of magnitude
change in the current. Theory showed that small changes in molecular configuration could cause alterations
in the corralled adatom’s electronic energy by as much as 1 eV due to local field effects, accounting for the
observed current switching.
This document describes a study probing the structural adaptability of [V3O5(SeO3)3]n2n- layers in organically templated vanadium selenites. The study involved 84 chemical reactions with 14 organic amines under different conditions. A decision tree was constructed using the experimental data to derive chemical hypotheses about the requirements for forming these layers. It was found that three criteria must be met: 1) hydrogen bonding stabilization with specific oxide ions requiring a primary ammonium site on the organic amine, 2) use of compact ammonium cations for charge matching with layers, and 3) control of competition between organic and NH4+ cations through reagent choice and concentrations. Seven new compounds containing
This document lists 79 publications by Thomas H. Fletcher and collaborators related to oil shale and kerogen characterization using various analytical techniques like NMR, FTIR, and mass spectrometry. The publications characterize the chemical and molecular structure of kerogen extracted from Green River Formation oil shales and pyrolysis products. They also study nitrogen transformations during coal pyrolysis and characterize soot produced from model compounds and coal.
This document summarizes research on substituent control of hydrogen bonding in palladium(II)-pyrazole complexes. Seven chelate complexes examined via X-ray crystallography all showed intramolecular hydrogen bonding between the pyrazole N-H group and a cis chloride ligand. Intermolecular hydrogen bonding was also observed and could be controlled by the substituent at the C-5 position of pyrazole; complexes with a methyl or no C-5 substituent showed significant intermolecular bonding, while a tert-butyl group at C-5 avoided such bonding. The acidity of two complexes in acetonitrile was estimated to be closer to that of pyridinium ion than imidazol
The document provides a list of 30 publications by the author with relevant metrics including the h-index of 18 and average citations per article of 31. Several of the publications focus on analyzing the chemical composition of particulate matter using techniques like mass spectrometry. Dates of the publications range from 1994 to 2015.
This document describes a novel approach for the electrochemical immobilization of proteins onto graphite electrode microarrays using diazonium chemistry. Specifically, proteins are first modified with an aniline derivative and then diazotated to form an aryl diazonium function. This allows the modified proteins to then be directly electro-addressed and covalently grafted onto the electrodes through reduction of the diazonium groups. Characterization with XPS and cyclic voltammetry confirmed successful grafting of a diazonium monolayer. As a proof of concept, rabbit IgG was immobilized and specifically detected the presence of anti-rabbit IgG antibodies, demonstrating the potential of this new strategy for spatially addressing different biological
This document summarizes a study that tested whether remote cis-syn-thymine dimers in DNA can be repaired by radical cations migrating through the DNA duplex. The researchers prepared DNA oligomers containing an anthraquinone derivative linked to the 5' end to act as an oxidant upon irradiation, as well as a cis-syn thymine dimer and strategically placed GG steps. Irradiation led to damage at remote GG steps, but no detectable repair (<3%) of the thymine dimer, in contrast to previous reports claiming efficient repair initiated by rhodium metallointercalators.
This document summarizes research on the formation of silver nanoparticles from a single-source precursor, N-hexadecylethylenediamine silver nitrate complex. The complex acts as both a metal ion provider and particle protector. Transmission electron microscopy and UV-vis spectroscopy showed the formation of spherical silver nanoparticles averaging 7.0-12.1 nm in size. Small-angle X-ray scattering supported the formation of a 2D array of nanoparticles with center-to-center spacing of 3.8-3.9 nm, consistent with the diamine ligand length. The stable colloidal solution formed indicates this complex is a viable route for controlled synthesis of silver nanoparticles using a single-source precursor.
This document summarizes a study that used X-ray crystallography and resonance Raman spectroscopy to characterize the oxo-molybdenum dithiolene complex (Tp*)MoO(qdt), which is a model system relevant to pyranopterin molybdenum enzyme active sites like sulfite oxidase. The compound was found to crystallize in the triclinic space group P1. Structural parameters of the first coordination sphere were similar to the related complex (Tp*)MoO(bdt), suggesting geometric effects are not major contributors to electronic structural differences between the two complexes. Raman spectroscopy provided evidence the dithiolene ligand interacts with the molybdenum center through
The document describes a novel three-step synthesis of the N(10)-C(17) fragment of cyclotheonamides, potent serine protease inhibitors. The key steps are:
1) A Passerini reaction between protected argininal, dipeptide isonitrile, and proline derivatives that produces adduct 13 in good yield.
2) Orthogonal deprotection of 13 leads to an O- to N-acyl migration, providing compound 14.
3) Compound 14 constitutes the desired N(10)-C(17) fragment and is produced in each step in good yield under mild conditions, representing an atom-economical synthesis.
This document summarizes an investigation into the low-temperature oxidation reactions of 2-phenylethanol using photoionization mass spectrometry. The reaction was initiated using 248 nm photolysis of chlorine at 298 K and 550 K, with and without oxygen present. A variety of reaction products were identified using mass spectrometry coupled to synchrotron radiation. Key findings include that the aromatic ring remains intact, all chemistry occurs on the side chain, and decomposition explains products with lower mass-to-charge ratios. More products need to be identified to determine branching fractions.
This document summarizes a report commissioned by the World Bank on options for low-carbon power sector regulation in China. It provides recommendations in six key areas: 1) Clarifying and coordinating power sector planning processes to integrate environmental goals; 2) Expanding energy efficiency obligations on grid companies; 3) Implementing a merit order approach to generator operations that incorporates emissions costs; 4) Expanding renewable energy targets and supporting policies; 5) Reforming retail pricing; and 6) Implementing emissions pricing. The recommendations aim to support China's goals of reducing carbon emissions, coal consumption, and improving air quality in the power sector.
Ronnie Terry has over 7 years of experience in IT security support, server support management, networking, and datacenter support. He currently works as a senior network engineer and administrator at Associated Medical Professionals of Central New York where he oversees network administration and maintenance. Prior to this role, he held several other network engineering and support roles for medical organizations in New York.
This short document promotes creating presentations using Haiku Deck, a tool for making slideshows. It encourages the reader to get started making their own Haiku Deck presentation and sharing it on SlideShare. In just one sentence, it pitches the idea of using Haiku Deck to easily create engaging slideshow presentations.
2015 PowerPoint Pres. Lunch & Learn (1) copyNorma B. Felix
This document provides information about Garden Art International, a company that manufactures custom cast garden art and planters. Some key points:
- They can custom design and manufacture a wide variety of garden art pieces in fiberglass or GFRC (glass fiber reinforced concrete) in various styles, colors, textures, and sizes.
- In addition to planters and urns, they produce trash/recycling receptacles, fire tables, fountains, and other garden décor.
- They can replicate existing pieces or create new custom designs. Materials are durable and weather resistant.
- The company is known for its hand-applied finishes that replicate various textures like stone, metal, and wood grain
This document describes billing plans in SAP. It discusses the different types of billing plans including periodic billing which is used for rental contracts, and milestone billing which is used to distribute amounts over billing dates based on project milestones. It describes how billing plans are controlled through billing plan types, date categories, and assigning billing plan types to items. Key functions of billing plans are also summarized such as automatic creation of dates, pricing, billing blocks, and document flow.
- The document describes billing plans, which define schedules of billing dates for items in sales documents. There are two main types of billing plans: periodic billing, which bills a total amount on set dates, and milestone billing, which distributes amounts over dates linked to project milestones.
- Billing plans are controlled through billing plan types, date categories, and date descriptions defined in customizing. These determine how dates are automatically set and what data is associated with each date.
- Periodic billing typically uses monthly or quarterly intervals between set dates. Milestone billing links dates to percentages of project completion or amounts upon reaching project milestones.
Risk assessment and management during food preparationaleeban_irasna
About the challenges reagarding food safety,risk analysis, risk assessment and principles of food safety management in food industry. Also contains the case study of Listeria monocytogenes in Deli meats
This document lists 37 publications by Jochem Struppe from 1993 to 2015. The publications cover a range of topics studied using solid-state NMR techniques including molecular motions in liquid crystals, lipid bilayers, membrane-associated peptides, and cannabinoid receptors. Many of the publications involve collaborations and applications of new NMR methods to biological questions.
B. Zhao paper2-JACS 2005.water soluble SWNTbinzhao2004
This document summarizes the synthesis and characterization of two water-soluble single-walled carbon nanotube (SWNT) graft copolymers. Specifically, poly(aminobenzene sulfonic acid) (PABS) and polyethylene glycol (PEG) were covalently attached to SWNTs to create SWNT-PABS and SWNT-PEG copolymers. Quantitative studies found the copolymers had water solubility of about 5 mg/mL. Thermogravimetric analysis estimated the SWNT loading to be 30% for SWNT-PABS and 71% for SWNT-PEG. Spectroscopic studies showed SWNT-P
This document contains 59 references to scientific papers on a variety of topics related to fluid dynamics, heat transfer, evaporation, cavitation, and water treatment. The references cover experimental and computational studies of topics such as nanobubbles, droplet evaporation, pool boiling, fluid-fluid separation processes, and hydraulic power generation.
Electronic Switching of Single Silicon Atoms by Molecular Field Effectsioneec
We have observed on-off switching of scanning tunneling microscope current flow to silicon
adatoms of the Si(111)-(7 7) surface that are enclosed within a bistable dimeric corral of self-assembled
chlorododecane molecules. These thermally activated oscillations amounted to an order of magnitude
change in the current. Theory showed that small changes in molecular configuration could cause alterations
in the corralled adatom’s electronic energy by as much as 1 eV due to local field effects, accounting for the
observed current switching.
This document describes a study probing the structural adaptability of [V3O5(SeO3)3]n2n- layers in organically templated vanadium selenites. The study involved 84 chemical reactions with 14 organic amines under different conditions. A decision tree was constructed using the experimental data to derive chemical hypotheses about the requirements for forming these layers. It was found that three criteria must be met: 1) hydrogen bonding stabilization with specific oxide ions requiring a primary ammonium site on the organic amine, 2) use of compact ammonium cations for charge matching with layers, and 3) control of competition between organic and NH4+ cations through reagent choice and concentrations. Seven new compounds containing
This document lists 79 publications by Thomas H. Fletcher and collaborators related to oil shale and kerogen characterization using various analytical techniques like NMR, FTIR, and mass spectrometry. The publications characterize the chemical and molecular structure of kerogen extracted from Green River Formation oil shales and pyrolysis products. They also study nitrogen transformations during coal pyrolysis and characterize soot produced from model compounds and coal.
This document summarizes research on substituent control of hydrogen bonding in palladium(II)-pyrazole complexes. Seven chelate complexes examined via X-ray crystallography all showed intramolecular hydrogen bonding between the pyrazole N-H group and a cis chloride ligand. Intermolecular hydrogen bonding was also observed and could be controlled by the substituent at the C-5 position of pyrazole; complexes with a methyl or no C-5 substituent showed significant intermolecular bonding, while a tert-butyl group at C-5 avoided such bonding. The acidity of two complexes in acetonitrile was estimated to be closer to that of pyridinium ion than imidazol
The document provides a list of 30 publications by the author with relevant metrics including the h-index of 18 and average citations per article of 31. Several of the publications focus on analyzing the chemical composition of particulate matter using techniques like mass spectrometry. Dates of the publications range from 1994 to 2015.
This document describes a novel approach for the electrochemical immobilization of proteins onto graphite electrode microarrays using diazonium chemistry. Specifically, proteins are first modified with an aniline derivative and then diazotated to form an aryl diazonium function. This allows the modified proteins to then be directly electro-addressed and covalently grafted onto the electrodes through reduction of the diazonium groups. Characterization with XPS and cyclic voltammetry confirmed successful grafting of a diazonium monolayer. As a proof of concept, rabbit IgG was immobilized and specifically detected the presence of anti-rabbit IgG antibodies, demonstrating the potential of this new strategy for spatially addressing different biological
This document summarizes a study that tested whether remote cis-syn-thymine dimers in DNA can be repaired by radical cations migrating through the DNA duplex. The researchers prepared DNA oligomers containing an anthraquinone derivative linked to the 5' end to act as an oxidant upon irradiation, as well as a cis-syn thymine dimer and strategically placed GG steps. Irradiation led to damage at remote GG steps, but no detectable repair (<3%) of the thymine dimer, in contrast to previous reports claiming efficient repair initiated by rhodium metallointercalators.
This document summarizes research on the formation of silver nanoparticles from a single-source precursor, N-hexadecylethylenediamine silver nitrate complex. The complex acts as both a metal ion provider and particle protector. Transmission electron microscopy and UV-vis spectroscopy showed the formation of spherical silver nanoparticles averaging 7.0-12.1 nm in size. Small-angle X-ray scattering supported the formation of a 2D array of nanoparticles with center-to-center spacing of 3.8-3.9 nm, consistent with the diamine ligand length. The stable colloidal solution formed indicates this complex is a viable route for controlled synthesis of silver nanoparticles using a single-source precursor.
This document summarizes a study that used X-ray crystallography and resonance Raman spectroscopy to characterize the oxo-molybdenum dithiolene complex (Tp*)MoO(qdt), which is a model system relevant to pyranopterin molybdenum enzyme active sites like sulfite oxidase. The compound was found to crystallize in the triclinic space group P1. Structural parameters of the first coordination sphere were similar to the related complex (Tp*)MoO(bdt), suggesting geometric effects are not major contributors to electronic structural differences between the two complexes. Raman spectroscopy provided evidence the dithiolene ligand interacts with the molybdenum center through
The document describes a novel three-step synthesis of the N(10)-C(17) fragment of cyclotheonamides, potent serine protease inhibitors. The key steps are:
1) A Passerini reaction between protected argininal, dipeptide isonitrile, and proline derivatives that produces adduct 13 in good yield.
2) Orthogonal deprotection of 13 leads to an O- to N-acyl migration, providing compound 14.
3) Compound 14 constitutes the desired N(10)-C(17) fragment and is produced in each step in good yield under mild conditions, representing an atom-economical synthesis.
This document summarizes an investigation into the low-temperature oxidation reactions of 2-phenylethanol using photoionization mass spectrometry. The reaction was initiated using 248 nm photolysis of chlorine at 298 K and 550 K, with and without oxygen present. A variety of reaction products were identified using mass spectrometry coupled to synchrotron radiation. Key findings include that the aromatic ring remains intact, all chemistry occurs on the side chain, and decomposition explains products with lower mass-to-charge ratios. More products need to be identified to determine branching fractions.
This document describes a study aimed at the enantioselective synthesis of spirodiketopiperazine analogs of hydantocidin. The key steps involve:
1) Coupling furanoid glycals, which can undergo metalation, to N-protected 2,3-azetidinediones in the presence of BF3 to favor the keto form.
2) The resulting carbinols undergo smooth ring expansion to spirocyclic keto amides when heated with pyridinium p-toluenesulfonate.
3) Sequential Baeyer-Villiger oxidation and ammonolysis, where the oxidation occurs with exclusive migration of the quaternary carbon and ammonolysis is
Мутации бактерий на арене с антибиотикамиAnatol Alizar
This document describes experiments using a new device called a MEGA-plate to study the evolution of bacteria in a spatially structured environment. The MEGA-plate consists of a large tray containing agar with gradients of increasing antibiotic concentration. Bacteria are inoculated at one end and spread across the plate through chemotaxis and nutrient depletion. Mutants able to survive in higher antibiotic concentrations can migrate further. Over time, the bacteria evolve increased resistance through sequential adaptive steps of competing lineages. Analysis of isolates from the propagating front found that highly resistant mutants are not always the leaders - they may be trapped behind more sensitive lineages. The MEGA-plate allows direct observation of evolutionary dynamics in a large population under spatial selection pressures.
This document summarizes spectroscopic evidence from electronic absorption, magnetic circular dichroism (MCD), and resonance Raman spectroscopies that provide insight into the unique bonding interaction in oxo-molybdenum dithiolate complexes. The data suggests these complexes have low-energy sulfur to molybdenum charge transfer transitions originating from a set of four filled dithiolate orbitals that are primarily sulfur in character. Resonance Raman excitation profiles allowed assignment of an ene-dithiolate in-plane sulfur to molybdenum transition. Three totally symmetric vibrational modes were also identified. The results provide context for understanding electron transfer pathways in pyranopterin dithiolate centers
The document provides an overview of articles related to the use of the Crystal16® system in the pharmaceutical and polymer industries. It lists numerous articles from 2010-2008 that describe research using Crystal16® for applications such as crystallization screening, polymorph detection, and studying the effects of solvents on phase behavior and crystallization kinetics in both industry contexts.
This document describes research into tungsten allylimido complexes as single-source precursors for tungsten nitride (WNx) and tungsten carbonitride (WNxCy) thin films deposited by chemical vapor deposition (CVD). The complexes Cl4(RCN)W(NC3H5) (3a, R = CH3 and 3b, R = Ph) were tested as precursors. Films deposited below 550°C contained amorphous β-WNxCy, while those deposited at higher temperatures were polycrystalline. Film growth rates ranged from 5 to 10 Å/min between 450-650°C. Cleavage of the N-C imido bond is implicated
This curriculum vitae summarizes the education and professional experience of Preston T. Snee. He received his PhD in Physical Chemistry from UC Berkeley in 2002 and is currently an Associate Professor at the University of Illinois at Chicago. His research focuses on creating functional semiconductor quantum dots and he has supervised many graduate and undergraduate students. He has over 60 publications in peer-reviewed journals related to quantum dot synthesis and applications.
1. 580318-5973 – Jan van Stam – Curriculum Vitae
Updated May 20, 2015
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Publications – Jan van Stam
List of publications
Citation Tracker: Web of Science/Google Scholar/ResearchGate
h Index: 20, i10 Index: 34, RG Score 33.22, RG Impact 175.26
Thesis
Ionic Surfactant–Polymer Interactions Studied by Time-Resolved Fluorescence Quenching
van Stam J
Acta Universitatis Upsaliensis [309], The Dean of the Faculty of Science (ed), Almkvist & Wiksell Int.,
Stockholm (1991)
Scientific publications
1. The Protolysis of Singlet Excited β–Naphtol
van Stam J, Löfroth J-E
J. Chem. Educ., 1986, 63, 181-184; Number of citations: 16
2. Structure and Transport in the Microemulsion Phase of the System Triton X-100–Toluene–Water
Almgren M, van Stam J, Swarup S, Löfroth J-E
Langmuir, 1986, 2, 432-438; Number of citations: 61
3. Fluorescence Decay Kinetics in Monodisperse Confinements with Exchange of Probes and Quenchers
Almgren M, Löfroth J-E, van Stam J
J. Phys. Chem., 1986, 90, 4431-4437; Number of citations: 96
4. Fluorescence Quenching Dynamics in Rodlike Micelles
Almgren M, Alsins J, Mukhtar E, van Stam J
J. Phys. Chem., 1988, 92, 4479-4483; Number of citations: 59
5. Fluorescence Decay Studies of Structure and Dynamics in Ionic Micellar Solutions
Almgren M, Alsins J, van Stam J
Ordering and Organization in Ionic Solutions, World Scientific Publishing Co Ltd, Singapore (1988), 225-232
6. The micellar sphere-to-rod transition in CTAC–NaClO3. A fluorescence quenching study
Almgren M, Alsins J, van Stam J, Mukhtar E; Number of citations: 27
Progr. Colloid Polym. Sci., 1988, 76, 68-74
7. Structure of a Computer Program for Fluorescence Decay Data Analysis
van Stam J, Medhage B
Finn. Chem. Lett., 1988, 15, 67-68; Number of citations: 1
8. Static and Dynamic Properties of Nonionic Amphiphile Micelles: Triton X–100 in Aqueous Solution
Brown W, Rymdén R, van Stam J, Almgren M, Svensk G
J. Phys. Chem., 1989, 93, 2512-2519; Number of citations: 96
9. Diffusion-Controlled Fluorescence Quenching in Micelles
Almgren M, Alsins J, Mukhtar E, van Stam J
Reactions in Compartmentalized Liquids; Knoche W and Schomäcker R (eds), Springer-Verlag, Berlin
Heidelberg (1989), 61-88
10. Aggregation of Poly(ethylene oxide)–Poly(propylene oxide)–Poly(ethylene oxide) Triblock
Copolymers in the Presence of Sodium Dodecyl Sulfate in Aqueous Solution
Almgren M, van Stam J, Lindblad C, Li P, Stilbs P, Bahadur P
J. Phys. Chem., 1991, 95, 5677-5684; Number of citations: 167
11. Sodium dodecylsulfate–poly(ethyleneoxide) interactions studied by time-resolved fluorescence
quenching
van Stam J, Almgren M, Lindblad C
Progr. Colloid Polym. Sci., 1991, 84, 8-12; Number of citations: 80
12. Time-Resolved Fluorescence and Self-Diffusion Studies in Systems of a Cationic Surfactant and an
Anionic Polyelectrolyte
Thalberg K, van Stam J, Lindblad C, Almgren M, Lindman B
J. Phys. Chem., 1991, 95, 8975-8982; Number of citations: 91
2. 580318-5973 – Jan van Stam – Curriculum Vitae
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Publications – Jan van Stam
13. Aggregation of Alkyltrimethylammonium Surfactants in Aqueous Poly(styrenesulfonate) Solutions
Almgren M, Hansson P, Mukhtar E, van Stam J
Langmuir, 1992, 8, 2405-2412; Number of citations: 187
14. Non-spherical Micelles in the Sodium Dodecylsulfate–Brine System - A Fluorescence Quenching and
Nuclear Magnetic Resonance Study
Söderman O, Jonströmer M, van Stam J
J. Chem. Soc., Faraday Trans., 1993, 89, 1759-1764; Number of citations: 20
15. Change in the Micellar Aggregation Number or in the Size Distribution?
A Dynamic Fluorescence Quenching Study of Aqueous Cetyltrimethylammonium Chloride
Reekmans S, Bernik D, Gehlen M, van Stam J, Van der Auweraer M, De Schryver F C
Langmuir, 1993, 9, 2289-2296; Number of citations: 26
16. Interaction between Sodium Dodecyl Sulfate and Poly(ethylene oxide) in Aqueous Systems. Light-
Scattering and Dynamic Fluorescence-Quenching Studies of the Effect of Added Salt
van Stam J, Brown W, Fundin J, Almgren M, Lindblad C
Colloid-Polymer Interactions; Dubin, P.L., Tong, P., (eds).; ACS Symposium Series; American Chemical
Society: Washington, DC (1993), 194-215; Number of citations: 14
17. Luminescence spectroscopy and microdomains
De Schryver FC, van Stam J, Gehlen MH, Van der Auweraer M, Boens N, Reekmans S, Negri RM, Wittouck
N, Bernik D, Ameloot M, Faes H, Noukakis D
MICROCHEMISTRY: Spectroscopy and Chemistry in Small Domains; Masuhara H., De Schryver F.C.,
Kitamura N., Tamai N. (eds), Elsevier, Amsterdam, New York, Tokyo (1994), 415-430; Number of citations: 0
18. Excited-state probing of associative and covalent macromolecules
De Schryver FC, Boens N, Van der Auweraer M, Viaene L, Reekmans S, Hermans B, van Stam J, Gehlen M,
Berghmans H, Berghmans M, Ameloot M
Pure & Appl. Chem., 1995, 67, 157-165; Number of citations: 3
19. Global Compartmental Analysis of the Fluorescence Decay Surface of the Halato Telechelic Polymer
(N,N-dimethyl-N-[3-(1-pyrenyl)propyl]ammonio)-trifluoromethane-sulfonate-End-Capped
Poly(tetrahydrofuran)
Hermans B, De Schryver FC, van Stam J, Boens N, Jérôme R, Teyssié P, Trossaert G, Goethals E, Schacht E
Macromolecules, 1995, 28, 3380-3386; Number of citations: 5
20. Emission of a Bichromophoric Molecule in the Presence of an Added Quencher. Study of the Time-
Resolved Fluorescence by Global Compartmental Analysis with and without the Use of a Model
Compound
van Stam J, Van Dommelen L, Boens N, Zachariasse K, De Schryver FC
J. Phys. Chem., 1995, 99, 9386-9396; Number of citations: 7
21. Intermicellar Mobility of Probe and Quencher in Reverse Micelles Studied by Fluorescence
Quenching
Gehlen MH, De Schryver FC, G Bhaskar Dutt, van Stam J, Boens N, Van der Auweraer M
J. Phys. Chem., 1995, 99, 14407-14413; Number of citations: 16
22. On the Interpretation of Excited-state Decay Data for the Determination of the Equilibrium
Constants in Compartmentalized Systems
van Stam J, De Feyter S, Boens N, De Schryver FC
J. Chem. Soc., Chem. Comm., 1995, 2433-2434; Number of citations: 5
23. The role of polymer flexibility on the interaction with surfactant micelles: poly(vinyl alcohol) and
sodium dodecyl sulphate aqueous micelle interactions studied by dynamic fluorescence quenching
van Stam J, Wittouck N, Almgren M, De Schryver FC, Miguel M
Can. J. Chem., 1995, 73, 1765-1772; Number of citations: 16
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24. On the use of dynamic fluorescence measurements to determine equilibrium and kinetic constants.
The inclusion of pyrene in β-cyclodextrin cavities
De Feyter S, van Stam J, Boens N, De Schryver FC
Chem. Phys. Lett., 1996, 249, 46-52; Number of citations: 13
25. Bimolecular Processes of α-Terthiophene in a β-Cyclodextrin Environment: An Exploratory Study
Evans CH, De Feyter S, Viaene L, van Stam J, De Schryver FC
J. Phys. Chem., 1996, 100, 2129-2135; Number of citations: 29
26. The emission at 669 nm of metal free phthalocyanine in toluene and 1-bromonaphthalene solutions
Van Mingroot H, De Backer S, van Stam J, Van der Auweraer M, De Schryver FC
Chem. Phys. Lett., 1996, 253, 397-402; Number of citations: 3
27. Global compartmental analysis of the fluorescence decay surface of intramolecular chain mediated
and through space excited-state complex formation of a silane linked donor-acceptor system
Hermans E, De Schryver FC, G Bhaskar Dutt, van Stam J, De Feyter S, Boens N, Miller RD
New J. Chem., 1996, 20, 829-838; Number of citations: 5
28. 2-Naphthol Complexation by β-Cyclodextrin: Influence of Added Linear Alcohols
van Stam J, De Feyter S, De Schryver FC, Evans CH
J. Phys. Chem., 1996, 100, 19959-19966; Number of citations: 40
29. Are Aqueous Sodium Dodecyl Sulfate Micelles in the Presence of Added Salt Polydisperse? A Time-
Resolved Fluorescence Quenching Study with Global Analysis
G Bhaskar Dutt, van Stam J, De Schryver FC
Langmuir, 1997, 13, 1957-1963; Number of citations: 20
30. Exchange of Polymer Molecules Between Block Copolymer Micelles Studied by Emission
Spectroscopy. A Method for the Quantification of Unimer Exchange Rates
Creutz S, van Stam J, Antoun S, De Schryver FC, Jérôme R
Macromolecules, 1997, 30, 4078-4083; Number of citations: 56
31. Intramolecular Excited-State Processes of a Halato Telechelic Polymer, Evaluated by Global
Compartmental Analysis of the Fluorescence Decay Surface with the Use of Model Compounds
van Stam J, De Schryver FC, Boens N, Hermans B, Jérôme R, Trossaert G, Goethals E, Schacht E
Macromolecules, 1997, 30, 5582-5590; Number of citations: 2
32. Observation of α-terthiophene excited dimer fluorescence in aqueous solutions of γ-cyclodextrin
De Feyter S, van Stam J, Imans F, Viaene L, De Schryver FC, Evans CH
Chem. Phys. Lett., 1997, 277, 44-50; Number of citations: 19
33. Micellar Aggregation Numbers - A Fluorescence Study
van Stam J, Depaemelaere S, De Schryver, FC
J. Chem. Educ., 1998, 75, 93-98; Number of citations: 59
34. Dynamics of Poly((dimethylamino)alkyl methacrylate-block-sodium methacrylate) Micelles.
Influence of Hydrophobicity and Molecular Architecture on the Exchange Rate of Copolymer
Molecules
Creutz S, van Stam J, De Schryver FC, Jérôme R
Macromolecules, 1998, 31, 681-689; Number of citations: 101
35. α-Terthiophene in nonionic Triton X-100 micelles: biphotonic creation of its radical cation
Viaene L, van Stam J, Imans F, Evans C, De Feyter S, De Schryver FC
Chem. Phys. Lett., 1998, 286, 452-456; Number of citations: 3
36. Transmission and confocal fluorescence microscopy, and time-resolved fluorescence spectroscopy
combined with a laser trap: Investigation of optically trapped block copolymer micelles
Gensch T, Hofkens J,van Stam J, Faes H, Creutz S, Tsuda K, Jérôme R, Masuhara H, De Schryver FC
J. Phys. Chem. B, 1998, 102, 8440-8451; Number of citations: 16
4. 580318-5973 – Jan van Stam – Curriculum Vitae
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Publications – Jan van Stam
37. Identification and Characterization of Aggregates Formed by a Partly Neutralized Isophthalic Acid
Derivative in Aqueous Solution
Meiners C, De Feyter S, Lieser G, van Stam J, Soltermann A, Berghmans H, De Schryver FC, Müllen K
Langmuir, 1999, 15, 3374-3380; Number of citations: 2
38. α-Terthiophene in Micellar Solutions: Influence of Micellar Size and Charge on the Terthiophene
Photophysics and Photochemical Reactivity
van Stam J, Imans F, Viaene L, De Schryver FC, Evans CH
J. Phys. Chem. B, 1999, 103, 5160-5166; Number of citations: 5
39. Electron Transfer Reactions in Micelles: Reactivity of Pyrene and Tris(2,2’-bipyridyl)ruthenium(II)
Excited States Investigated by Time-Resolved Fluorescence Quenching
Soboleva IV, van Stam J, G Bhaskar Dutt, Kuzmin MG, De Schryver FC
Langmuir, 1999, 15, 6201-6207; Number of citations: 15
40. Tuning of the Exchange Dynamics of Unimers between Block Copolymer Micelles with
Temperature, Cosolvents, and Cosurfactants
van Stam J, Creutz S, De Schryver FC, Jérôme R
Macromolecules, 2000, 33, 6388-6395; Number of citations: 59
41. Naphthalene Complexation by β-Cyclodextrin: Influence of Added Short Chain Branched and
Linear Alcohols
Evans CH, Partyka M, van Stam J
J. Inclusion Phenom., 2000, 38, 381-396; Number of citations: 34
42. Polysoaps in Aqueous Solutions: Intermolecular versus Intramolecular Hydrophobic Aggregation
and Long-Time Stability Studies by Fluorescence Spectroscopy
Cochin D, De Schryver FC, Laschewsky A, van Stam J
Langmuir, 2001, 17, 2579-2584; Number of citations: 14
43. Supramolecular Control of Two-Dimensional Phase Behavior
De Feyter S, Larsson M, Schuurmans N, Verkuijl B, Zorniants G, Gesquière A, Abdel-Mottaleb MM, van
Esch J, Feringa BL, van Stam J, De Schryver FC
Chem. Eur. J., 2003, 9, 1198-1206; Number of citations: 56
44. Dynamic Fluorescence Microscopy As a Feasible Technique for Estimating the Diffusion
Coefficients of Small Particles in the Presence of Additives
Carlsson G, Warszynski P, van Stam J
J. Colloid Interface Sci., 2003, 267, 500-508; Number of citations: 5
45. Higher-Order Cyclodextrin Complexes: The Naphthalene System
Sau S, Solanki, B., Orprecio R, van Stam J, Evans CH
J. Inclusion Phenom. Macrocyclic Chem., 2004, 48, 173-180; Number of citations: 19
46. Interactions between Charged Latex Colloids and Starch Polyelectrolytes Studied by Fluorescence
Microscopy with Image Analysis
Carlsson G, van Stam J
Nordic Pulp Pap. Res. J., 2005, 20, 192-199; Number of citations: 2
47. Tuning of the α-Terthiophene Radical Cation Coupling Reaction by the Use of Mixed Micelles with
Varying Charge Density
van Stam J, Viaene L, Evans CH
ChemPhysChem, 2005, 6, 2428-2433; Number of citations: 2
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Publications – Jan van Stam
48. Alternative Fuel for a Standard Diesel Engine
Hull A, Golubkov I, Kronberg B, van Stam J
Int. J. Engine Res., 2006, 7, 51-64; Number of citations: 8
49. Latex Diffusion at High Volume Fractions Studied by Fluorescence Microscopy
Carlsson G, Järnström L, van Stam J
J. Colloid Interface Sci., 2006, 298, 162-171; Number of citations: 3
50. An Alternative Fuel for a Standard Spark Ignition Engine
Hull A, Golubkov I, Kronberg B, Marandzheva T, van Stam J
Int. J. Engine Res., 2006, 7, 203-214; Number of citations: 10
51. Vapour-Liquid Equilibrium of Binary Mixtures: Part I; ethanol + 1-butanol, ethanol + octane,
1-butanol + octane
Hull A, Kronberg B, van Stam J, Golubkov I, Kristensson J
J. Chem. Eng. Data, 2006, 51, 1996-2001; Number of citations: 6
52. Vapour-Liquid Equilibrium of Binary Mixtures: Part II; ethanol + 2,2,4-trimethyl pentane,
1-butanol + 2,2,4-trimethyl pentane, ethanol + o-xylene
Hull A, Kronberg B, van Stam J, Golubkov I, Kristensson J
J. Chem. Eng. Data, 2006, 51, 2002-2008; Number of citations: 2
53. Imbibition into model calcium carbonate coatings of fluid with different dipole moments
Olsson R, van Stam J, Lestelius M
Appita J., 2006, 59, 471-485; Number of citations: 1
54. Effects on ink setting in flexographic printing: Coating polarity and dot gain
Olsson R, Yang L, van Stam J, Lestelius M
Nordic Pulp Pap. Res. J., 2006, 21, 569-574; Number of citations: 5
55. Effects of elevated temperature on flexographic printing
Olsson R, Yang L, van Stam J, Lestelius M
Advances in Printing and Media Technology, Proceedings of the 34th Research Conference of IARIGAI,
Grenoble, France, Sept. 9-12, 2007; Number of citations: 3
56. Ibuprofen loading into mesostructured silica using liquid carbon dioxide as a solvent
Hillerström A, van Stam J, Andersson M
Green Chem., 2009, 11, 662-667; Number of citations: 10
57. Transparency and wettability of PVP/PDMS-IPN synthesized in different organic solvents
Hillerström A, Skov Pedersen J, Altskär A, Langton M, van Stam J, Andersson M, Kronberg B
J. Appl. Polym. Sci., 2009, 114, 1828-1839; Number of citations: 10
58. Tuning the vertical phase separation in polyfluorene:fullerene blend films by polymer
functionalisation
Anselmo AS, Lindgren L, Rysz J, Bernasik A, Budkowski A, Andersson M, Svensson K, van Stam J, Moons E
Chem. Mater., 2011, 23, 2295-2302; Number of citations: 20
59. Synchrotron XRR study of soft nanofilms at the mica-water interface
Briscoe WH, Speranza F, Li P, Konovalov O, Bouchenoire L, van Stam J, Klein J, Jacobs RMJ, Thomas RK
Soft Matter, 2012, 8, 5055-5068; Number of citations: 5
60. Solvent strategies for loading and release in mesoporous silica
Hillerström A, Andersson M, Samuelsson J, van Stam J
Colloid Interface Sci. Commun., 2014, 3, 5-8
61. Fluorescence Spectroscopy Studies on Polymer Blend Solutions and Films for Photovoltaics
van Stam J, Hansson R, Lindqvist C, Ericsson L, Moons E
Colloid Surface A, 2015, http://dx.doi.org/doi:10.1016/j.colsurfa.2015.04.003