Annotated bibliography #3
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Seyed et al. investigated the effects of mobile phone radiofrequency electromagnetic fields (EMFs) at 910 MHz and 940 MHz on the structure and function of hemoglobin. They found that exposure to EMFs altered hemoglobin's oxygen affinity and tertiary structure by decreasing its ability to bind oxygen in the lungs and increasing its release of oxygen to tissues. The changes corresponded to the intensity and duration of EMF exposure, suggesting that EMFs could affect human respiration.
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Metalbinding_AminoAcids
The document summarizes research into how heavy metals like copper and lead alter the structure and function of amino acids and proteins when binding to them. UV, FTIR, and 1H NMR spectroscopy methods were used to analyze the structural changes in alanine, histidine, and bovine serum albumin when bound to heavy metals. The spectroscopic data confirmed structural changes occurred upon metal binding, through new and disappeared peaks in FTIR, and chemical shift and signal changes in 1H NMR. This indicates these spectroscopy methods can be used to study how metal binding complexes structurally change amino acids and proteins.
Abstract_Woronowicz_et_al_ERPC 2014a
This document summarizes a study investigating electron transport in a biohybrid system composed of photosystem II, graphene oxide, and photosystem I. The researchers coupled photosystem II and photosystem I complexes to graphene oxide using nickel-nitrilotriacetic acid groups to form triads mimicking natural photosynthesis. Kinetic studies using Joliot-type spectroscopy showed that photosystem I retains activity when immobilized on graphene oxide and that there is direct electronic communication between photosystem II and photosystem I via graphene oxide. These findings indicate graphene oxide can facilitate vectorial electron transfer in a biohybrid system modeling the natural Z-scheme of photosynthesis.
2016 Poster Fordham_Final2
The researchers developed a method to measure fluorescence of sub-monolayer concentrations of pyrene on electropolished aluminum surfaces using UV detection. Aluminum slides were cleaned and electropolished, then functionalized with n-octadecylphosphonic acid to attract pyrene molecules. Fluorescence measurements found the aluminum surface enhanced pyrene fluorescence 16 times more than fused silica. Over time after removal from solution, the pyrene fluorescence on aluminum changed, likely due to evaporation of polar methanol from the nonpolar surface. Future work will use FRAP to study pyrene mobility on functionalized versus untreated aluminum.
UV-Visible basic by M.aadil
The document discusses Muhammad Aadil's PhD research presentation on UV-Visible spectroscopy. It introduces spectroscopy, the electromagnetic spectrum, and the principle of UV-Visible spectroscopy involving electronic transitions. It describes the instrumentation including light sources, monochromators, sample holders, and detectors. It discusses Beer-Lambert's law and its use in quantitative analysis. Key terms like chromophores and auxochromes are defined. Applications to analyze the reduction of graphene oxide and formation of metal nanoparticles are mentioned. Common questions about the technique are also listed.
The Effect of Gamma Irradiation on the Radiofrequency Dielectric Dispersion P...
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
boe-6-10-4098
1) Multi-photon microscopy was used to characterize the intrinsic fluorescence of sickle cell disease hemoglobin (HbS). HbS demonstrated broad emission around 510 nm when excited at 800 nm.
2) MPM was able to dynamically induce and image HbS gel formation through photolysis of deoxygenated HbS. Healthy hemoglobin (HbA) remained in solution and did not form fibers under the same conditions.
3) The intrinsic fluorescence of HbS fibers could enable the study of environmental factors that impact HbS polymerization and sickling of red blood cells, which is relevant for understanding sickle cell disease.
Kinetics of Substituted Bis- and Mono-azo Dyes as Corrosion Inhibitors for Al...
This investigation is designed to apply an advanced kinetic^thermodynamic model on the data obtained from acidic and alkaline corrosion of aluminium using bis- and mono-azo dyes as corrosion inhibitors.
Piperazine derivatives as iron chelators a potential
This document summarizes a study that synthesized new piperazine derivatives designed as iron chelators and assessed their potential to prevent iron-induced neurotoxicity. The compounds were able to provide sustained neuroprotection to dopaminergic neurons vulnerable in Parkinson's disease. Spectrophotometric titration showed the compounds have high affinity for iron and can chelate iron, while an in vitro cellular model demonstrated their neuroprotective effects. The document then details the experimental methods used for synthesizing the piperazine derivatives and assessing their iron-chelating properties and neuroprotective abilities.
Recommended
Metalbinding_AminoAcids
The document summarizes research into how heavy metals like copper and lead alter the structure and function of amino acids and proteins when binding to them. UV, FTIR, and 1H NMR spectroscopy methods were used to analyze the structural changes in alanine, histidine, and bovine serum albumin when bound to heavy metals. The spectroscopic data confirmed structural changes occurred upon metal binding, through new and disappeared peaks in FTIR, and chemical shift and signal changes in 1H NMR. This indicates these spectroscopy methods can be used to study how metal binding complexes structurally change amino acids and proteins.
Abstract_Woronowicz_et_al_ERPC 2014a
This document summarizes a study investigating electron transport in a biohybrid system composed of photosystem II, graphene oxide, and photosystem I. The researchers coupled photosystem II and photosystem I complexes to graphene oxide using nickel-nitrilotriacetic acid groups to form triads mimicking natural photosynthesis. Kinetic studies using Joliot-type spectroscopy showed that photosystem I retains activity when immobilized on graphene oxide and that there is direct electronic communication between photosystem II and photosystem I via graphene oxide. These findings indicate graphene oxide can facilitate vectorial electron transfer in a biohybrid system modeling the natural Z-scheme of photosynthesis.
2016 Poster Fordham_Final2
The researchers developed a method to measure fluorescence of sub-monolayer concentrations of pyrene on electropolished aluminum surfaces using UV detection. Aluminum slides were cleaned and electropolished, then functionalized with n-octadecylphosphonic acid to attract pyrene molecules. Fluorescence measurements found the aluminum surface enhanced pyrene fluorescence 16 times more than fused silica. Over time after removal from solution, the pyrene fluorescence on aluminum changed, likely due to evaporation of polar methanol from the nonpolar surface. Future work will use FRAP to study pyrene mobility on functionalized versus untreated aluminum.
UV-Visible basic by M.aadil
The document discusses Muhammad Aadil's PhD research presentation on UV-Visible spectroscopy. It introduces spectroscopy, the electromagnetic spectrum, and the principle of UV-Visible spectroscopy involving electronic transitions. It describes the instrumentation including light sources, monochromators, sample holders, and detectors. It discusses Beer-Lambert's law and its use in quantitative analysis. Key terms like chromophores and auxochromes are defined. Applications to analyze the reduction of graphene oxide and formation of metal nanoparticles are mentioned. Common questions about the technique are also listed.
The Effect of Gamma Irradiation on the Radiofrequency Dielectric Dispersion P...
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
boe-6-10-4098
1) Multi-photon microscopy was used to characterize the intrinsic fluorescence of sickle cell disease hemoglobin (HbS). HbS demonstrated broad emission around 510 nm when excited at 800 nm.
2) MPM was able to dynamically induce and image HbS gel formation through photolysis of deoxygenated HbS. Healthy hemoglobin (HbA) remained in solution and did not form fibers under the same conditions.
3) The intrinsic fluorescence of HbS fibers could enable the study of environmental factors that impact HbS polymerization and sickling of red blood cells, which is relevant for understanding sickle cell disease.
Kinetics of Substituted Bis- and Mono-azo Dyes as Corrosion Inhibitors for Al...
This investigation is designed to apply an advanced kinetic^thermodynamic model on the data obtained from acidic and alkaline corrosion of aluminium using bis- and mono-azo dyes as corrosion inhibitors.
Piperazine derivatives as iron chelators a potential
This document summarizes a study that synthesized new piperazine derivatives designed as iron chelators and assessed their potential to prevent iron-induced neurotoxicity. The compounds were able to provide sustained neuroprotection to dopaminergic neurons vulnerable in Parkinson's disease. Spectrophotometric titration showed the compounds have high affinity for iron and can chelate iron, while an in vitro cellular model demonstrated their neuroprotective effects. The document then details the experimental methods used for synthesizing the piperazine derivatives and assessing their iron-chelating properties and neuroprotective abilities.
Estimates of Exposure Technical Paper
This study estimated community exposure and health risks from sulfur dioxide (SO2) emissions from three coal-fired power plants near Baltimore, Maryland. Short-term mobile and stationary air monitoring of SO2 was conducted from June to September 2013. Maximum 5-minute and 1-hour SO2 concentrations measured near the plants were below levels found to cause respiratory symptoms in clinical studies of healthy exercising asthmatics. The results suggest SO2 exposure levels near the power plants were not likely to elicit respiratory symptoms in sensitive groups.
SYNTHESIS OF BIOACTIVE HETEROCYCLES BY USING SONOCHEMISTRY
This document discusses the synthesis of bioactive heterocycles using sonochemistry. It begins with an introduction to sonochemistry and how ultrasound enhances chemical reactivity through acoustic cavitation. It then covers the historical background of sonochemistry, theories of ultrasound and cavitation, parameters that affect cavitation, synthetic approaches, advantages like shortened reaction times and increased yields, and applications in polymer science, organic chemistry, and biochemistry. The conclusion states that the unique environments created by sonochemistry allow clean and efficient chemical conversions in water and solvent-free conditions.
Computational Model for Deposition, Clearance and Dosimetry of Inhaled Aeroso...
This presentation summarizes research on modeling deposition, clearance, and dosimetry of inhaled particles in the human lung. It describes a stochastic computational model called IDEAL that calculates particle deposition based on size, morphology of the lung airways, and breathing parameters. It also models particle clearance mechanisms and calculates radiation doses to different lung regions from deposited radionuclides. The model shows intersubject variability in deposition and dosimetry due to differences in breathing patterns, airway dimensions, and other anatomical factors.
a1999k
This investigation examines the kinetics and thermodynamics of bis- and mono-azo dye compounds as corrosion inhibitors for aluminum in hydrochloric acid and sodium hydroxide solutions. Ten bis- and mono-azo dye compounds were tested as corrosion inhibitors using weight-loss, thermometric, and polarization measurements. In general, inhibition efficiency increased with increasing inhibitor concentration and was higher in acidic solutions than alkaline solutions. A kinetic-thermodynamic model and Frumkin adsorption isotherm were applied to evaluate the inhibition mechanism. The number and type of adsorption sites on the dye molecules, along with their charge density and molecular structure, affected their inhibition efficiency.
Core-cladding mode resonances of long period fiber grating in concentration s...
Long period fiber grating (LPFG) is photoinduced fiber device that facilitates the coupling of core
mode to different cladding modes resulting into series of transmission dips in the transmission spectrum. Here
we present LPFG chemical sensor to determine the concentration of Manganese in water at ppm level. We
fabricated LPFG of period 600μm in single mode communication fiber using 12W carbon dioxide laser
applying point by point method. The fabricated LPFG is directly used as chemical sensor since cladding modes
coupled to core mode directly come in contact with surrounding chemicals. Concentration of manganese in our
collected sample is found to be 0.0329ppm. The result is verified with sophisticated Atomic Absorption
Spectrometer (AAS).
investigation on agarose gel electrophoresis
The document investigates the constituents of lecturer's chalk using X-ray fluorescence (XRF) and Fast Neutron Activation Analysis (FNAA) techniques. The analyses found calcium to be the major element with small traces of aluminum, iron, magnesium, and silicon. The concentrations of these elements were measured in different chalk samples. The presence of potentially toxic elements and the inhalation of chalk dust by lecturers motivates the study for safety purposes.
Effects of electric field on histopathological study, electrical properties a...
The present work was undertaken in order to investigate the effects of electric field (EF) of strength 50Hz-3KV/m on the histopathology, dielectric properties and liver function tests in albino rats. Fifty male albino rats were equally divided into three groups namely A, B, and C. Animals of group A used as control group which didn't receive any treatment . Animals of group B was divided into two subgroups namely B1 and B2 which were discretely exposed to 50HZ, 3KV/m electric field for a period of 15 day (8 hours/day, 5day/week). Group B2 animals were left to survive and housed at normal environmental conditions similar to control group A for a period of 15 day post exposed. Animals of group C are divided into two subgroups namely C1 and C2 were discretely exposed to the electric field for a period of 30 day (8 hours/day, 5day/week). Group C2 animals were left to survive and housed at normal environmental conditions similar to control group A for a period of 15 day post exposed. At the end of this period, blood and tissues samples were collected from all groups for experimental investigations. The dielectric constant (έ), electrical conductivity (σ) was measured in frequency range 42Hz-5MHz to investigate any changes in liver structure through studding histopathological examination. Also, the liver function was studied through analysis of glutamic oxaloacetic transaminase (GOT), glutamic pyruvie transaminase (GPT) and total protein (TP) after exposure to electric field this biochemical parameters have been evaluated in the blood serum of rats. The obtained results show high significant changes in the value of έ and σ of liver tissues for all groups exposed to EF as compared with control group. The levels of GOT and GPT were increased up to four times their values during the period of exposure to EF. These variations were recovered during two week after stopping exposure but they did not return to its original control values before exposure. On microscopic level; liver histological observations in liver cells which revealed some alterations including hepatic tissue with two portal tracts showing mild florous expansion and a dilated central vein, also ghosts of hepatocytes denoting necrotic changes also shows hepatic tissue with dilated central veins engorged with blood and splitting out to adjacent hepatocytes.
Seminario 2 Respiratory function of hemoglobin
Hemoglobin actively regulates oxygen transport through allosteric effects. Binding of oxygen causes a conformational change that increases hemoglobin's affinity for additional oxygen, promoting cooperative binding in a sigmoid relationship. Hemoglobin's affinity is reduced by protons, carbon dioxide, and 2,3-BPG, maximizing oxygen unloading in tissues via the Bohr and Haldane effects. This optimized coupling of oxygen and carbon dioxide transport is vital for respiration.
FFW Poster 2014 - Chase Lab
The document discusses developing novel fluorescent dyes through asymmetric boron difluoride complexes. It aims to design dyes with broad Stokes shifts like BODIPY but without its narrow emission properties. Future work discussed includes synthesizing BF2 complexes with N,O and N,N ligands to study the effect of heteroatomic substitution on emission. Distyryl and arylbenzamide BF2 complexes will also be made to investigate conjugation extension and solid state quenching effects. The overall goal is tunable dyes for applications like bioimaging, sensors and light emitting devices.
Simulation of IR Spectra of Some Organic Compounds-A Review
In the present review a discussion of simulation of IR spectral studies of some organic compound is presented. This review contains 80 references.
Michael Ludden L3Report2016
This document describes Michael Ludden's synthesis and characterization of various molybdenum complexes. Three complexes were synthesized - [CpMo(CO)3Me], [CpMo(CO)3Et], and [CpMo(CO)2(COMe)(PPh3)]. They were characterized using NMR and IR spectroscopy. The results confirmed the structures of the complexes and showed how changing ligands affects properties. Kinetic measurements of migratory insertion reactions will be taken using these complexes to understand reaction rate dependence on factors like solvent, temperature and ligand type.
FACTORS RELATED TO COHb CONTENT TOWARD PARKING OFFICER OF PLAZA X SURABAYA
The aim of thisresearchwas to study the effect of riskfactorsincludesage,gender, workinglives, body position whileworking, smoking habit, blood type, nutrientstatus, level of Hb, to COHblevelsblood in parking officersat X Plaza Surabaya. This researchwas an analyticobservationalstudywhichconducted cross sectional, using simple randomsamplingtechnique. The sample for thisresearchused 30 people.Themeasurement of carbonmonoxide air concentration at parking plaza x conducted on three-point surroundingofficerswork area. COHbcorrelationwithage, workingperiod, Hb, were analyzed usedPearsoncorrelation.The correlationbetweengender, smoking habit and body position whileworking to blood COHBlevelused T sampleanalyzed. The correlationbetweenblood types and bloodCOHblevelwasanalyzedbyanalysis of variance / ANOVA.The Spearman test was used to analyzed thenutritionalstatus. The resultshowedthathighestcarbonmonoxidelevelsfound in motorcyclewhich 16.1 ppm. Ambient air quality standard based on PP No. 41 of 1999 is 10 ppm, if wecomparedwith the resultweconcludethatlevels of CO at parking motor has exceeded the threshold. Based on thisresearch, advised to provide more local exhaust or air conditioning system aroundworking places of parking officers to reduce CO levelwhichproduced by vehicle. Also, weoffer to management handling the parking officers to givevitamin C and vitamin E as antioxidantthatreducetoxic in their body and to give check up facility for health condition regularly
Fourier Transform Infrared and Ultraviolet-Visible Spectroscopic Characteriza...
Ammonium acetate and ammonium chloride are the white crystalline solid inorganic compounds having wide application in synthesis and analytical chemistry. The aim of present study was to evaluate the impact of biofield treatment on spectral properties of inorganic salt like ammonium acetate and ammonium chloride.
SIRFinalPaper1
The document summarizes a student research project investigating the design of short peptide amphiphiles that can bind transition metal ions. The student synthesized a peptide called C16-AHLHL3K3 and used various characterization techniques. Results showed the peptide formed beta-pleated sheet fibers under certain conditions and was able to bind transition metals like cobalt. This demonstrates the potential for short peptides to have transition metal binding sites and possibly enzymatic capabilities.
Simulation of atmospheric mercury dispersion and deposition in Tehran city
In this study, dispersion and deposition of atmospheric mercury (Hg) in Tehran city was simulated using WRF-SMOKE-CMAQ models. The Weather Research and Forecasting (WRF) model was used to simulate the meteorological parameters. For validation of WRF results; the simulated wind speeds and temperatures were compared with the parameters measured at a meteorological station in Tehran city for 11 days (8 days in fall and 3 days in winter) in 2010 - 2011. The correlation coefficient (r) for temperature and wind speed were 0.94 and 0.49, respectively indicating there was good agreement between measured and modeled results. An atmospheric mercury emission inventory was developed using the United Nations Environment Programme (UNEP), the United States Environmental Protection Agency AP-42 (US-EPA AP-42) and related papers. Sparse Matrix Operator Kernel Emissions (SMOKE) was used to allocate the atmospheric mercury emissions to the modeling domain and the Community Multiscale Air Quality (CMAQ) model was used to simulate the concentration and deposition of atmospheric mercury. To validate the results of the CMAQ model, the simulated atmospheric particulate mercury (PHg) concentrations for 11 days were compared with the measured results at two different stations (Bagh Ferdows and Bahman Square) where it was measured by the Tehran Air Quality Control Company (AQCC). Comparison between the results from the modeled and measurements of PHg in fall was better than winter. Concentrations and dry depositions of the various forms of atmospheric mercury were higher in areas closer to mercury stationary emission sources.
SIMONA CAVALU_Adsorption behavior of hyaluronidase onto silver
Surface enhanced Raman scattering (SERS) and ATR-FTIR spectroscopy was applied in this work, in order to get
information about the adsorption behavior of the title macromolecule with respect to different surfaces. In this case, the
silver substrate can be considered as artificial substrate and the investigations regarding the mechanisms of adsorption can
be useful in order to elucidate the active site properties of this enzyme. Our purpose is to study the adsorption mechanism
of hyaluronidase onto silver nanoparticles and PMMA (polymethyl methacrylate) substrates as well as qualitative and
quantitative aspects regarding perturbations of protein secondary structure (α-helix, β-sheet and unordered structures) upon
adsorption, using deconvolution techniques.
Effects of Mobile Phones on Auditory acuity. Dr. Balaji P.A, Dr. Kailash N.pdf
This document summarizes a study that evaluated the effects of mobile phone use on auditory acuity. The study compared hearing thresholds between 300 mobile phone users and 100 non-users based on pure tone audiometry. Results found statistically significant increases in hearing thresholds among mobile users at certain frequencies. Specifically, thresholds were higher for mobile users at 1kHz, 4kHz, 6kHz and 8kHz frequencies compared to non-users. Dominant ears (those used for calls more often) also had higher thresholds than non-dominant ears at some frequencies among mobile users. However, the duration and amount of mobile use did not correlate with hearing thresholds. The study concludes mobile use may mildly impair hearing but further research is
Effects of Mobile Phones on Auditory acuity. Dr. Balaji P.A, Dr. Kailash N.pdf
RJMS 2011;1(1):25-30.
Abstract
Background and Objectives: There is an exponential
increase in the usage of mobile phones throughout the
world. Mobile phone handsets are usually held near
the ear during conversations and these phones emit
radiations (electromagnetic fields). These radiations
have a propensity to cause biological health hazards.
This has raised the question of whether the usage of
mobile phones has any detrimental effects on the
hearing of the user. The aim of this study was to
evaluate the auditory acuity in normal subjects using
mobile phones and subjects not using.
Methods: A total 400 subjects were selected
considering inclusion and exclusion criteria. Among
these 300 were mobile users and 100 non-users. These
two groups were subjected to pure tone audiometric
assessment. The resulting data was statistically
analyzed.
Results: There was an increase in the hearing
thresholds with p-value <0.05 at frequencies of lkhz
(BC), 4khz (AC and BC), 6khz(AC) and 8khz(AC) in
the mobile phone users compared to that in non-users.
The thresholds in the dominant ear were increased
with p-value <0.05 at frequencies lkhz(AC and BC),
2khz(AC and BC), 4khz(AC and BC), 6khz(AC) that
compared in non-dominant ear. The different duration
of exposures (in months) and the average time
(min/day) exposures did not have any significant
effect on the hearing thresholds.
Conclusion: There is a mild increase in the hearing
thresholds in mobile users, but the probable cause of
hearing impairment cannot be proved by this study
and the possible pathophysiology is also not
understood and it needs to be investigated further...
Key words: Mobile phones, electromagnetic fields
(EMF), Pure tone audiometry, Air conduction (AC),
Bone conduction (BC).
Effects of Mobile Phones on Auditory acuity. Dr. Balaji P.A, Dr. Kailash N.pdf
Abstract
Background and Objectives: There is an exponential
increase in the usage of mobile phones throughout the
world. Mobile phone handsets are usually held near
the ear during conversations and these phones emit
radiations (electromagnetic fields). These radiations
have a propensity to cause biological health hazards.
This has raised the question of whether the usage of
mobile phones has any detrimental effects on the
hearing of the user. The aim of this study was to
evaluate the auditory acuity in normal subjects using
mobile phones and subjects not using.
Methods: A total 400 subjects were selected
considering inclusion and exclusion criteria. Among
these 300 were mobile users and 100 non-users. These
two groups were subjected to pure tone audiometric
assessment. The resulting data was statistically
analyzed.
Results: There was an increase in the hearing
thresholds with p-value <0.05 at frequencies of lkhz
(BC), 4khz (AC and BC), 6khz(AC) and 8khz(AC) in
the mobile phone users compared to that in non-users.
The thresholds in the dominant ear were increased
with p-value <0.05 at frequencies lkhz(AC and BC),
2khz(AC and BC), 4khz(AC and BC), 6khz(AC) that
compared in non-dominant ear. The different duration
of exposures (in months) and the average time
(min/day) exposures did not have any significant
effect on the hearing thresholds.
Conclusion: There is a mild increase in the hearing
thresholds in mobile users, but the probable cause of
hearing impairment cannot be proved by this study
and the possible pathophysiology is also not
understood and it needs to be investigated further...
Key words: Mobile phones, electromagnetic fields
(EMF), Pure tone audiometry, Air conduction (AC),
Bone conduction (BC).
Walton-2015-Nature
Patterson et al. used a new microscopy technique called liquid-cell transmission electron microscopy (LCTEM) to observe the crystallization of metal-organic frameworks (MOFs) in real time. This provided insights into the growth mechanisms. They observed that MOFs like ZIF-8 grow through the transport and attachment of metal ions and ligands to particle edges, not by particle coalescence. This two-step process of transport followed by edge attachment limits the growth rate. LCTEM is able to directly observe growth at the nanoscale and will provide insights to better control MOF synthesis.
Rise program makes new scientists
The RISE Program helps students become familiar with scientific research through hands-on experiences. It teaches students how to think creatively by proposing original research topics and defending proposals. It also teaches how to access and interpret scientific literature to inform research. Students learn important laboratory techniques that will help them perform research. The various courses and experiences of the RISE Program contribute to preparing new potential scientists and benefiting society through advancing scientific understanding.
Escrito proposal
This document proposes a study to determine if prenatal exposure to cell phone use causes attention-deficit/hyperactivity disorder (ADHD) in offspring. The study would have two phases: first, surveying pregnant women and mothers of 3-6 year olds about cell phone use during pregnancy and children's behavior; second, exposing pregnant hamsters to cell phone electromagnetic radiation at different frequencies and durations and observing offspring behavior. The goal is to raise awareness in pregnant women about cell phone use and further research effects of prenatal exposure on children's health and behavior.
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Estimates of Exposure Technical Paper
This study estimated community exposure and health risks from sulfur dioxide (SO2) emissions from three coal-fired power plants near Baltimore, Maryland. Short-term mobile and stationary air monitoring of SO2 was conducted from June to September 2013. Maximum 5-minute and 1-hour SO2 concentrations measured near the plants were below levels found to cause respiratory symptoms in clinical studies of healthy exercising asthmatics. The results suggest SO2 exposure levels near the power plants were not likely to elicit respiratory symptoms in sensitive groups.
SYNTHESIS OF BIOACTIVE HETEROCYCLES BY USING SONOCHEMISTRY
This document discusses the synthesis of bioactive heterocycles using sonochemistry. It begins with an introduction to sonochemistry and how ultrasound enhances chemical reactivity through acoustic cavitation. It then covers the historical background of sonochemistry, theories of ultrasound and cavitation, parameters that affect cavitation, synthetic approaches, advantages like shortened reaction times and increased yields, and applications in polymer science, organic chemistry, and biochemistry. The conclusion states that the unique environments created by sonochemistry allow clean and efficient chemical conversions in water and solvent-free conditions.
Computational Model for Deposition, Clearance and Dosimetry of Inhaled Aeroso...
This presentation summarizes research on modeling deposition, clearance, and dosimetry of inhaled particles in the human lung. It describes a stochastic computational model called IDEAL that calculates particle deposition based on size, morphology of the lung airways, and breathing parameters. It also models particle clearance mechanisms and calculates radiation doses to different lung regions from deposited radionuclides. The model shows intersubject variability in deposition and dosimetry due to differences in breathing patterns, airway dimensions, and other anatomical factors.
a1999k
This investigation examines the kinetics and thermodynamics of bis- and mono-azo dye compounds as corrosion inhibitors for aluminum in hydrochloric acid and sodium hydroxide solutions. Ten bis- and mono-azo dye compounds were tested as corrosion inhibitors using weight-loss, thermometric, and polarization measurements. In general, inhibition efficiency increased with increasing inhibitor concentration and was higher in acidic solutions than alkaline solutions. A kinetic-thermodynamic model and Frumkin adsorption isotherm were applied to evaluate the inhibition mechanism. The number and type of adsorption sites on the dye molecules, along with their charge density and molecular structure, affected their inhibition efficiency.
Core-cladding mode resonances of long period fiber grating in concentration s...
Long period fiber grating (LPFG) is photoinduced fiber device that facilitates the coupling of core
mode to different cladding modes resulting into series of transmission dips in the transmission spectrum. Here
we present LPFG chemical sensor to determine the concentration of Manganese in water at ppm level. We
fabricated LPFG of period 600μm in single mode communication fiber using 12W carbon dioxide laser
applying point by point method. The fabricated LPFG is directly used as chemical sensor since cladding modes
coupled to core mode directly come in contact with surrounding chemicals. Concentration of manganese in our
collected sample is found to be 0.0329ppm. The result is verified with sophisticated Atomic Absorption
Spectrometer (AAS).
investigation on agarose gel electrophoresis
The document investigates the constituents of lecturer's chalk using X-ray fluorescence (XRF) and Fast Neutron Activation Analysis (FNAA) techniques. The analyses found calcium to be the major element with small traces of aluminum, iron, magnesium, and silicon. The concentrations of these elements were measured in different chalk samples. The presence of potentially toxic elements and the inhalation of chalk dust by lecturers motivates the study for safety purposes.
Effects of electric field on histopathological study, electrical properties a...
The present work was undertaken in order to investigate the effects of electric field (EF) of strength 50Hz-3KV/m on the histopathology, dielectric properties and liver function tests in albino rats. Fifty male albino rats were equally divided into three groups namely A, B, and C. Animals of group A used as control group which didn't receive any treatment . Animals of group B was divided into two subgroups namely B1 and B2 which were discretely exposed to 50HZ, 3KV/m electric field for a period of 15 day (8 hours/day, 5day/week). Group B2 animals were left to survive and housed at normal environmental conditions similar to control group A for a period of 15 day post exposed. Animals of group C are divided into two subgroups namely C1 and C2 were discretely exposed to the electric field for a period of 30 day (8 hours/day, 5day/week). Group C2 animals were left to survive and housed at normal environmental conditions similar to control group A for a period of 15 day post exposed. At the end of this period, blood and tissues samples were collected from all groups for experimental investigations. The dielectric constant (έ), electrical conductivity (σ) was measured in frequency range 42Hz-5MHz to investigate any changes in liver structure through studding histopathological examination. Also, the liver function was studied through analysis of glutamic oxaloacetic transaminase (GOT), glutamic pyruvie transaminase (GPT) and total protein (TP) after exposure to electric field this biochemical parameters have been evaluated in the blood serum of rats. The obtained results show high significant changes in the value of έ and σ of liver tissues for all groups exposed to EF as compared with control group. The levels of GOT and GPT were increased up to four times their values during the period of exposure to EF. These variations were recovered during two week after stopping exposure but they did not return to its original control values before exposure. On microscopic level; liver histological observations in liver cells which revealed some alterations including hepatic tissue with two portal tracts showing mild florous expansion and a dilated central vein, also ghosts of hepatocytes denoting necrotic changes also shows hepatic tissue with dilated central veins engorged with blood and splitting out to adjacent hepatocytes.
Seminario 2 Respiratory function of hemoglobin
Hemoglobin actively regulates oxygen transport through allosteric effects. Binding of oxygen causes a conformational change that increases hemoglobin's affinity for additional oxygen, promoting cooperative binding in a sigmoid relationship. Hemoglobin's affinity is reduced by protons, carbon dioxide, and 2,3-BPG, maximizing oxygen unloading in tissues via the Bohr and Haldane effects. This optimized coupling of oxygen and carbon dioxide transport is vital for respiration.
FFW Poster 2014 - Chase Lab
The document discusses developing novel fluorescent dyes through asymmetric boron difluoride complexes. It aims to design dyes with broad Stokes shifts like BODIPY but without its narrow emission properties. Future work discussed includes synthesizing BF2 complexes with N,O and N,N ligands to study the effect of heteroatomic substitution on emission. Distyryl and arylbenzamide BF2 complexes will also be made to investigate conjugation extension and solid state quenching effects. The overall goal is tunable dyes for applications like bioimaging, sensors and light emitting devices.
Simulation of IR Spectra of Some Organic Compounds-A Review
In the present review a discussion of simulation of IR spectral studies of some organic compound is presented. This review contains 80 references.
Michael Ludden L3Report2016
This document describes Michael Ludden's synthesis and characterization of various molybdenum complexes. Three complexes were synthesized - [CpMo(CO)3Me], [CpMo(CO)3Et], and [CpMo(CO)2(COMe)(PPh3)]. They were characterized using NMR and IR spectroscopy. The results confirmed the structures of the complexes and showed how changing ligands affects properties. Kinetic measurements of migratory insertion reactions will be taken using these complexes to understand reaction rate dependence on factors like solvent, temperature and ligand type.
FACTORS RELATED TO COHb CONTENT TOWARD PARKING OFFICER OF PLAZA X SURABAYA
The aim of thisresearchwas to study the effect of riskfactorsincludesage,gender, workinglives, body position whileworking, smoking habit, blood type, nutrientstatus, level of Hb, to COHblevelsblood in parking officersat X Plaza Surabaya. This researchwas an analyticobservationalstudywhichconducted cross sectional, using simple randomsamplingtechnique. The sample for thisresearchused 30 people.Themeasurement of carbonmonoxide air concentration at parking plaza x conducted on three-point surroundingofficerswork area. COHbcorrelationwithage, workingperiod, Hb, were analyzed usedPearsoncorrelation.The correlationbetweengender, smoking habit and body position whileworking to blood COHBlevelused T sampleanalyzed. The correlationbetweenblood types and bloodCOHblevelwasanalyzedbyanalysis of variance / ANOVA.The Spearman test was used to analyzed thenutritionalstatus. The resultshowedthathighestcarbonmonoxidelevelsfound in motorcyclewhich 16.1 ppm. Ambient air quality standard based on PP No. 41 of 1999 is 10 ppm, if wecomparedwith the resultweconcludethatlevels of CO at parking motor has exceeded the threshold. Based on thisresearch, advised to provide more local exhaust or air conditioning system aroundworking places of parking officers to reduce CO levelwhichproduced by vehicle. Also, weoffer to management handling the parking officers to givevitamin C and vitamin E as antioxidantthatreducetoxic in their body and to give check up facility for health condition regularly
Fourier Transform Infrared and Ultraviolet-Visible Spectroscopic Characteriza...
Ammonium acetate and ammonium chloride are the white crystalline solid inorganic compounds having wide application in synthesis and analytical chemistry. The aim of present study was to evaluate the impact of biofield treatment on spectral properties of inorganic salt like ammonium acetate and ammonium chloride.
SIRFinalPaper1
The document summarizes a student research project investigating the design of short peptide amphiphiles that can bind transition metal ions. The student synthesized a peptide called C16-AHLHL3K3 and used various characterization techniques. Results showed the peptide formed beta-pleated sheet fibers under certain conditions and was able to bind transition metals like cobalt. This demonstrates the potential for short peptides to have transition metal binding sites and possibly enzymatic capabilities.
Simulation of atmospheric mercury dispersion and deposition in Tehran city
In this study, dispersion and deposition of atmospheric mercury (Hg) in Tehran city was simulated using WRF-SMOKE-CMAQ models. The Weather Research and Forecasting (WRF) model was used to simulate the meteorological parameters. For validation of WRF results; the simulated wind speeds and temperatures were compared with the parameters measured at a meteorological station in Tehran city for 11 days (8 days in fall and 3 days in winter) in 2010 - 2011. The correlation coefficient (r) for temperature and wind speed were 0.94 and 0.49, respectively indicating there was good agreement between measured and modeled results. An atmospheric mercury emission inventory was developed using the United Nations Environment Programme (UNEP), the United States Environmental Protection Agency AP-42 (US-EPA AP-42) and related papers. Sparse Matrix Operator Kernel Emissions (SMOKE) was used to allocate the atmospheric mercury emissions to the modeling domain and the Community Multiscale Air Quality (CMAQ) model was used to simulate the concentration and deposition of atmospheric mercury. To validate the results of the CMAQ model, the simulated atmospheric particulate mercury (PHg) concentrations for 11 days were compared with the measured results at two different stations (Bagh Ferdows and Bahman Square) where it was measured by the Tehran Air Quality Control Company (AQCC). Comparison between the results from the modeled and measurements of PHg in fall was better than winter. Concentrations and dry depositions of the various forms of atmospheric mercury were higher in areas closer to mercury stationary emission sources.
SIMONA CAVALU_Adsorption behavior of hyaluronidase onto silver
Surface enhanced Raman scattering (SERS) and ATR-FTIR spectroscopy was applied in this work, in order to get
information about the adsorption behavior of the title macromolecule with respect to different surfaces. In this case, the
silver substrate can be considered as artificial substrate and the investigations regarding the mechanisms of adsorption can
be useful in order to elucidate the active site properties of this enzyme. Our purpose is to study the adsorption mechanism
of hyaluronidase onto silver nanoparticles and PMMA (polymethyl methacrylate) substrates as well as qualitative and
quantitative aspects regarding perturbations of protein secondary structure (α-helix, β-sheet and unordered structures) upon
adsorption, using deconvolution techniques.
Effects of Mobile Phones on Auditory acuity. Dr. Balaji P.A, Dr. Kailash N.pdf
This document summarizes a study that evaluated the effects of mobile phone use on auditory acuity. The study compared hearing thresholds between 300 mobile phone users and 100 non-users based on pure tone audiometry. Results found statistically significant increases in hearing thresholds among mobile users at certain frequencies. Specifically, thresholds were higher for mobile users at 1kHz, 4kHz, 6kHz and 8kHz frequencies compared to non-users. Dominant ears (those used for calls more often) also had higher thresholds than non-dominant ears at some frequencies among mobile users. However, the duration and amount of mobile use did not correlate with hearing thresholds. The study concludes mobile use may mildly impair hearing but further research is
Effects of Mobile Phones on Auditory acuity. Dr. Balaji P.A, Dr. Kailash N.pdf
RJMS 2011;1(1):25-30.
Abstract
Background and Objectives: There is an exponential
increase in the usage of mobile phones throughout the
world. Mobile phone handsets are usually held near
the ear during conversations and these phones emit
radiations (electromagnetic fields). These radiations
have a propensity to cause biological health hazards.
This has raised the question of whether the usage of
mobile phones has any detrimental effects on the
hearing of the user. The aim of this study was to
evaluate the auditory acuity in normal subjects using
mobile phones and subjects not using.
Methods: A total 400 subjects were selected
considering inclusion and exclusion criteria. Among
these 300 were mobile users and 100 non-users. These
two groups were subjected to pure tone audiometric
assessment. The resulting data was statistically
analyzed.
Results: There was an increase in the hearing
thresholds with p-value <0.05 at frequencies of lkhz
(BC), 4khz (AC and BC), 6khz(AC) and 8khz(AC) in
the mobile phone users compared to that in non-users.
The thresholds in the dominant ear were increased
with p-value <0.05 at frequencies lkhz(AC and BC),
2khz(AC and BC), 4khz(AC and BC), 6khz(AC) that
compared in non-dominant ear. The different duration
of exposures (in months) and the average time
(min/day) exposures did not have any significant
effect on the hearing thresholds.
Conclusion: There is a mild increase in the hearing
thresholds in mobile users, but the probable cause of
hearing impairment cannot be proved by this study
and the possible pathophysiology is also not
understood and it needs to be investigated further...
Key words: Mobile phones, electromagnetic fields
(EMF), Pure tone audiometry, Air conduction (AC),
Bone conduction (BC).
Effects of Mobile Phones on Auditory acuity. Dr. Balaji P.A, Dr. Kailash N.pdf
Abstract
Background and Objectives: There is an exponential
increase in the usage of mobile phones throughout the
world. Mobile phone handsets are usually held near
the ear during conversations and these phones emit
radiations (electromagnetic fields). These radiations
have a propensity to cause biological health hazards.
This has raised the question of whether the usage of
mobile phones has any detrimental effects on the
hearing of the user. The aim of this study was to
evaluate the auditory acuity in normal subjects using
mobile phones and subjects not using.
Methods: A total 400 subjects were selected
considering inclusion and exclusion criteria. Among
these 300 were mobile users and 100 non-users. These
two groups were subjected to pure tone audiometric
assessment. The resulting data was statistically
analyzed.
Results: There was an increase in the hearing
thresholds with p-value <0.05 at frequencies of lkhz
(BC), 4khz (AC and BC), 6khz(AC) and 8khz(AC) in
the mobile phone users compared to that in non-users.
The thresholds in the dominant ear were increased
with p-value <0.05 at frequencies lkhz(AC and BC),
2khz(AC and BC), 4khz(AC and BC), 6khz(AC) that
compared in non-dominant ear. The different duration
of exposures (in months) and the average time
(min/day) exposures did not have any significant
effect on the hearing thresholds.
Conclusion: There is a mild increase in the hearing
thresholds in mobile users, but the probable cause of
hearing impairment cannot be proved by this study
and the possible pathophysiology is also not
understood and it needs to be investigated further...
Key words: Mobile phones, electromagnetic fields
(EMF), Pure tone audiometry, Air conduction (AC),
Bone conduction (BC).
Walton-2015-Nature
Patterson et al. used a new microscopy technique called liquid-cell transmission electron microscopy (LCTEM) to observe the crystallization of metal-organic frameworks (MOFs) in real time. This provided insights into the growth mechanisms. They observed that MOFs like ZIF-8 grow through the transport and attachment of metal ions and ligands to particle edges, not by particle coalescence. This two-step process of transport followed by edge attachment limits the growth rate. LCTEM is able to directly observe growth at the nanoscale and will provide insights to better control MOF synthesis.
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Effects of Mobile Phones on Auditory acuity. Dr. Balaji P.A, Dr. Kailash N.pdf
Effects of Mobile Phones on Auditory acuity. Dr. Balaji P.A, Dr. Kailash N.pdf
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Effects of Mobile Phones on Auditory acuity. Dr. Balaji P.A, Dr. Kailash N.pdf
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Reflective paragraph 3 summer
During the morning, the student took a biology class with Dr. Belinda Román where they discussed chemistry and reviewed material from high school. The class talked about evolution and its relation to chemistry. They finished at 10:30 pm so the student went to the library to work on assignments.
Reflective paragraph 1 summer
Lester Rosario attended his first workshop for the Rise Program 2010 where he learned how to create a blog, something he had never done before. The professor taught him how to include personal information and make the blog interesting by including details about the Rise Program. Creating a blog will make communication easier between Lester and his professor and allow him to document his experiences as a student and future professional.
ELISA
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Got protein?
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pGLO Bacterial Transformation and pGLO SDS Page Extension
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Annotated bibliography #2
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Annotated bibliography #3
- 1. Seyed M, Gholam R, Mahmood K, Hadi A, Naghmeh S, Ahmad S, Shahrokh S, Faizan A and Ali M. 2009. Effects of mobile phone radiofrequency on the structure and function of the normal human hemoglobin. International Journal of Biological Macromolecules 44(3):278-285. Hemoglobin is a protein whose physiological function is to transport oxygen from the lungs to the tissues. Seyed at el. investigated the effects of mobile phone radiofrequency (910 MHz and 940 MHz) on the structure and function of hemoglobin (HbA). Oxygen affinity was measured by using sodium dithionite with Ultraviolet–visible spectrophotometer. Structural changes were studied by circular dichroism (characterizes protein structure) and fluorescence spectroscopy. It was found that mobile phone electromagnetic fields (EMFs) altered oxygen affinity and the tertiary structure of HbA. It was found that HbA binded less oxygen in the lungs and released more oxygen than normal to the tissues. This finding suggests that exposure to electromagnetic fields could affect human’s normal respiration. The decrease of oxygen affinity of HbA corresponded to the EMFs intensity and time of exposure.