MOFs are ideal candidates as gas-sensing materials and have been widely used to detect oxygen, water vapor, toxic and hazardous gases, special air pollutants, and VOCs.
MOF is a new class of material with lots of opportunity for future work. It is a coordination compound. Obviously MOF is a attractive subject for a group of researcher.
Synthesis and Characterization of MOF based Composites for Energy storage app...Danyal Hakeem Jokhio
Despite extensive efforts and research put in the field, conventional energy storage devices (ESDs) such as various supercapacitors and batteries are near their performance limit in terms of power densities, energy densities, capacitance, charge retention, and cyclic stability. This is primarily due to limiting intrinsic properties of the electrode materials such as average surface area and poor porosity, combined with sluggish redox kinetics due to lack of electrode functionality. So, the need of the hour is to explore new materials for efficient storage of the energy. Among these new materials, metal-organic frameworks (MOFs) can serve as potential candidates because they have high specific surface area, high porosity with tuneable morphology and hence tuneable pore size, functionality linking to active metal sites and ligands. However, there remains a gap in fully utilising MOFs in energy storage applications commercially. Due to the highly porous nature of MOFs, their structural stability is compromised especially in aqueous electrolytes. To utilize the maximum potential of MOFs as electrode materials, it is of utmost importance to address poor structural integrity and low intrinsic conductivity of MOFs.
In this work, it has been tried to overcome the above-mentioned drawbacks of MOFs by using additives of conductive nature such as graphene nanoplatelets (GNP). Hydrothermal approach was used to synthesize hybrid MOF by controlling molar ratio of Nickel and Cobalt in combination with different organic ligands. As a battery-type supercapacitor electrode material, the 2:1 Ni/Co hybrid MOF with 40mg GNP, using terephthalic acid as ligand, delivered a high specific capacity of 658.8 C·g−1 at the current density of 1 A·g−1. Similarly, the 1:2 Ni/Co hybrid MOF, using 2-MethylImidazole as ligand, delivered a high specific capacity of 642.4 C·g−1 at the current density of 1 A·g−1. Moreover, breakthrough results were obtained by optimizing synthesis with in-situ deposition on nickel foam of 2:1 Ni/Co (with 40mg GNP) hybrid MOF, which produced an impressive specific capacity of 1264 C·g−1 at 1 A/g, surpassing, to the best of our knowledge, most of the previously reported MOF based electrode materials.
This work not only develops a high-performance electrode material of supercapacitor, but being the first of its kind in Pakistan, also provides the foundation of systematic research for the electrochemical properties of multi-metal MOFs.
Gas storage in metal organic frameworks(MOFs)Nitish Kumar
Gas storage in metal organic frameworks.
1. Metal organic frameworks has surface area more than 40 tennis courts per gram. So, it has high adsorption capacity.
2. Gas storage in a cylinder filled with MOFs can store much more gas than empty cylinder.
3. Apart from storage ,MOFs can also be used for Gas Separation.
MOF is a new class of material with lots of opportunity for future work. It is a coordination compound. Obviously MOF is a attractive subject for a group of researcher.
Synthesis and Characterization of MOF based Composites for Energy storage app...Danyal Hakeem Jokhio
Despite extensive efforts and research put in the field, conventional energy storage devices (ESDs) such as various supercapacitors and batteries are near their performance limit in terms of power densities, energy densities, capacitance, charge retention, and cyclic stability. This is primarily due to limiting intrinsic properties of the electrode materials such as average surface area and poor porosity, combined with sluggish redox kinetics due to lack of electrode functionality. So, the need of the hour is to explore new materials for efficient storage of the energy. Among these new materials, metal-organic frameworks (MOFs) can serve as potential candidates because they have high specific surface area, high porosity with tuneable morphology and hence tuneable pore size, functionality linking to active metal sites and ligands. However, there remains a gap in fully utilising MOFs in energy storage applications commercially. Due to the highly porous nature of MOFs, their structural stability is compromised especially in aqueous electrolytes. To utilize the maximum potential of MOFs as electrode materials, it is of utmost importance to address poor structural integrity and low intrinsic conductivity of MOFs.
In this work, it has been tried to overcome the above-mentioned drawbacks of MOFs by using additives of conductive nature such as graphene nanoplatelets (GNP). Hydrothermal approach was used to synthesize hybrid MOF by controlling molar ratio of Nickel and Cobalt in combination with different organic ligands. As a battery-type supercapacitor electrode material, the 2:1 Ni/Co hybrid MOF with 40mg GNP, using terephthalic acid as ligand, delivered a high specific capacity of 658.8 C·g−1 at the current density of 1 A·g−1. Similarly, the 1:2 Ni/Co hybrid MOF, using 2-MethylImidazole as ligand, delivered a high specific capacity of 642.4 C·g−1 at the current density of 1 A·g−1. Moreover, breakthrough results were obtained by optimizing synthesis with in-situ deposition on nickel foam of 2:1 Ni/Co (with 40mg GNP) hybrid MOF, which produced an impressive specific capacity of 1264 C·g−1 at 1 A/g, surpassing, to the best of our knowledge, most of the previously reported MOF based electrode materials.
This work not only develops a high-performance electrode material of supercapacitor, but being the first of its kind in Pakistan, also provides the foundation of systematic research for the electrochemical properties of multi-metal MOFs.
Gas storage in metal organic frameworks(MOFs)Nitish Kumar
Gas storage in metal organic frameworks.
1. Metal organic frameworks has surface area more than 40 tennis courts per gram. So, it has high adsorption capacity.
2. Gas storage in a cylinder filled with MOFs can store much more gas than empty cylinder.
3. Apart from storage ,MOFs can also be used for Gas Separation.
metal organic framework-carbon capture and sequestrationVasiUddin Siddiqui
MOF is a porous crystal like a spunge having an enormous surface area and provide much more rooms for storage the gases preferentially hydrogen and carbon dioxide and work as storage for next generation fuel.
This presentation describes about the preparation, properties, bonding modes, classification and applications of metal Dioxygen Complexes. Also explains the MO diagram of molecular oxygen.
Photo degradation & photo stabilization of polymersKeshav Singh
Photo-Degradation & Photo-Stabilization of Polymers
Polymer Degradation
Different Types of Degradation
Photodegradation
Factors Causing Photodegradation
Effects of Photodegradation & Need for Photostabilization
Photo-stabilization
Presentation given by Dr Tina Düren from University of Edinburgh on "Molecular simulation of carbon capture in MOFs: challenges and pitfalls" in the Capture Technical Session on Solid Adsorption at the UKCCSRC Biannual Meeting - CCS in the Bigger Picture - held in Cambridge on 2-3 April 2014
Microwave Assisted Synthesis of Metallic NanostructuresJoyce Joseph
It gives you the brief idea about synthesizing metallic nanoparticles, an introduction to this concept in simple terms.
Hoping to give you guys more detail on it soon
An overview of the use of the Marcus Theory to calculate the energies of transition states.
Contributed by: Elizabeth Greenhalgh, Amanda Bischoff, and Matthew Sigman, University of Utah, 2015
Dioxygen complexes, dioxygen as ligand Geeta Tewari
This presentation describes about the preparation, properties, bonding modes, classification and applications of metal Dinitrogen Complexes. Also explains the MO diagram of molecular nitrogen.
metal organic framework-carbon capture and sequestrationVasiUddin Siddiqui
MOF is a porous crystal like a spunge having an enormous surface area and provide much more rooms for storage the gases preferentially hydrogen and carbon dioxide and work as storage for next generation fuel.
This presentation describes about the preparation, properties, bonding modes, classification and applications of metal Dioxygen Complexes. Also explains the MO diagram of molecular oxygen.
Photo degradation & photo stabilization of polymersKeshav Singh
Photo-Degradation & Photo-Stabilization of Polymers
Polymer Degradation
Different Types of Degradation
Photodegradation
Factors Causing Photodegradation
Effects of Photodegradation & Need for Photostabilization
Photo-stabilization
Presentation given by Dr Tina Düren from University of Edinburgh on "Molecular simulation of carbon capture in MOFs: challenges and pitfalls" in the Capture Technical Session on Solid Adsorption at the UKCCSRC Biannual Meeting - CCS in the Bigger Picture - held in Cambridge on 2-3 April 2014
Microwave Assisted Synthesis of Metallic NanostructuresJoyce Joseph
It gives you the brief idea about synthesizing metallic nanoparticles, an introduction to this concept in simple terms.
Hoping to give you guys more detail on it soon
An overview of the use of the Marcus Theory to calculate the energies of transition states.
Contributed by: Elizabeth Greenhalgh, Amanda Bischoff, and Matthew Sigman, University of Utah, 2015
Dioxygen complexes, dioxygen as ligand Geeta Tewari
This presentation describes about the preparation, properties, bonding modes, classification and applications of metal Dinitrogen Complexes. Also explains the MO diagram of molecular nitrogen.
DOI 10.1002tqem.21536R E S E A R C H A R T I C L EExDustiBuckner14
DOI: 10.1002/tqem.21536
R E S E A R C H A R T I C L E
Experimental investigation of adsorption capacity of anthill
in the removal of heavy metals from aqueous solution
Adeyinka Sikiru Yusuff Idowu Iyabo Olateju
Department of Chemical and Petroleum Engi-
neering, College of Engineering, Afe Babalola
University, Ado-Ekiti, Nigeria
Correspondence
Adeyinka Sikiru Yusuff, Department of Chemical
and Petroleum Engineering, College of Engineer-
ing, Afe Babalola University, Ado-Ekiti P.M.B.
5454, Nigeria.
Email: [email protected]
Abstract
In the present work, the adsorption capacity of anthill was investigated as a low-cost adsorbent
to remove the heavy metal ions, lead (II) ion (Pb2+), and zinc (II) ion (Zn2+) from an aqueous solu-
tion. The equilibrium adsorption isotherms of the heavy metal ions were investigated under batch
process. For the study we examined the effect of the solution's pH and the initial cations con-
centrations on the adsorption process under a fixed contact time and temperature. The anthill
sample was characterized using a scanning electron microscope (SEM), X-ray fluorescence (XRF),
and Fourier transform infrared (FTIR) techniques. From the SEM analysis, structural change in the
adsorbent was a result of heavy metals adsorption. Based on the XRF analysis, the main compo-
sition of the anthill sample was silica (SiO2 ), alumina (Al2 O3 ), and zirconia (ZrO2 ). The change in
the peaks of the spectra before and after adsorption indicated that there was active participation
of surface functional groups during the adsorption process. The experimental data obtained were
analyzed using 2- and 3-parameter isotherm models. The isotherm data fitted very well to the 3-
parameter Radke–Prausnitz model. It was noted that Pb2+ and Zn2+ can be effectively removed
from aqueous solution using anthill as an adsorbent.
K E Y W O R D S
adsorption, anthill, characterization, equilibrium isotherm, heavy metal
1 I N T R O D U C T I O N
Indiscriminate disposal of wastewater containing heavy metals has
received considerable attention in recent years, primarily due to the
fact that their presence in waste stream can be readily adsorbed by
aquatic organisms and make them directly enter the human food chain,
thus posing a serious health risk to consumers (Lin, MacLean, & Zeng,
2000). Because of the ability of heavy metals to accumulate in living
tissues and because they cause damage to these tissues over time,
heavy metals are classified as carcinogens. For example, exposure to
lead ions can cause anemia, kidney damage, and even untimely death
(Mohammed-Ridha, Ahmed, & Raoof, 2017), while zinc ions at elevated
concentration result in pancreas damage, osteoporosis, and even death
(Wahi, Ngaini, & Jok, 2009). Water or wastewater containing heavy
metals requires effective treatment techniques that can completely
remove these toxic metals (Yusuff, 2017).
A number of treatment techniques for the removal of heavy
me ...
Isotherm Modeling and Thermodynamic Study of the Adsorption of Toxic Metal by...CrimsonpublishersEAES
Isotherm Modeling and Thermodynamic Study of the Adsorption of Toxic Metal by the Apricot Stone by Moussa Abbas*, Tounsia Aksil and Mohamed Trari in Environmental Analysis & Ecology Studies
Design, Synthesis and Structural Inspection of Some Novel Di- And Tri-Azometh...CrimsonPublishersACSR
In this study, NBA imine compound was synthesized via an easy one-pot condensation of 3-nitro-benzaldyhide with 2-amino benzoic acid in 1:1 ratio and DAPH imine compound derived from 2,6-diacetyl pyridine and phenyl hydrazine hydrochloride. Consequences of the newly synthesized compounds
hooked up with the aid of FT-IR, elemental analyses, 13C-NMR ,1H-NMR and digital spectral research.
Experiments had been consistent with their chemical structures. Theoretical DFT calculations had been
implemented to confirm the molecular geometry of the investigated chemo-sensors. The sensor property
of all organized imines had been tested upon addition of the metal ions, consisting of Cr(III) ,Fe(II) ,Co(II) ,
Ni(II) ,Cu(II) ,Zn(II) ,Mn(II), VO(II) and Pd(II) .The interactions among receptors and ions are effortlessly
monitored with the aid of UV-visible spectroscopy. DAPH receptor confirmed color modification from
blood red to excessive deep green color to Co(II) ,a yellow color to Cu(II) and different colors to different
ions. Where the NBA receptor showed color modification from light yellow to excessive deep orange color
to Fe(II), pale orange to Pd(II) and different colors for other ions.
Biosorption of Copper (II) Ions by Eclipta Alba Leaf Powder from Aqueous Solu...ijtsrd
The removal of heavy metals from industrial wastewater is of great concern as heavy metals are non-biodegradable, toxic elements that cause serious health problems if disposed of in the surrounding environment. The present study, Karisalangkani (Eclipta Alba) leaves were used for the adsorption of heavy metals like copper (Cu (II)) ions. The bio sorbent was characterized using SEM and BET analysis. The bio sorption experiments are conducted through batch system. The operating parameters studied were initial metal ion concentration, adsorbent dosage, initial solution pH, contact time and effect of temperature Adsorption equilibrium is achieved in 30 min and the adsorption kinetics of Cu (II) is found to follow a pseudo-second-order kinetic model. Equilibrium data for Cu (II) adsorption are fitted well by Langmuir isotherm model. The maximum adsorption capacity for Cu (II) ions is estimated to be 9.2 mgg at 25 °C. The experimental result shows that the materials have good potential to remove heavy metals from effluent and good potential as an alternate low cost adsorbent. Due to their outstanding adsorption capacities, Eclipta Alba is excellent sorbents for the removal of copper (II) ions. B. Kavitha | R. Arunadevi"Biosorption of Copper (II) Ions by Eclipta Alba Leaf Powder from Aqueous Solutions" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-2 | Issue-5 , August 2018, URL: http://www.ijtsrd.com/papers/ijtsrd17156.pdf http://www.ijtsrd.com/chemistry/environmental-chemistry/17156/biosorption-of-copper-ii-ions-by-eclipta-alba-leaf-powder-from-aqueous-solutions/b-kavitha
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Synthesis of 2-aminocyclopent-1-ene-1-carbodithioic acid (ACA) Capped Silver ...IJERA Editor
The present work deals with the formation, morphology and photophysical activity of the 2-aminocyclopent-1-ene-1-carbodithioic acid (ACA) Capped Silver nanoparticles via chemical reduction method. The method utilizes a simple chemical reaction of silver idodide and sodium borohydride. The advantages of this method are ease of preparation, convenience in use and especially, that the obtained silver nano particles are uniform in their shapes and sizes. This is important for fluorescence & bio-evolution measurements. Furthermore, UV-visible (UV-vis) spectroscopy is employed to monitor the formation process of the nano particles and to determine the optimum conditions for the preparation of stable and highly fluorescence-active silver colloids. Specifically, we observed changes in the shapes of the silver nano particles during the formation. This may be helpful in understanding the growth of the nano particles and creates a new dimension in controlling the shapes of the nano particles.SEM, TEM and XRD studies are carried out. The suitability of ACA capped Ag-NPs as Biomarkers is also Tested by Fluorescence study.
International Journal of Engineering and Science Invention (IJESI)inventionjournals
International Journal of Engineering and Science Invention (IJESI) is an international journal intended for professionals and researchers in all fields of computer science and electronics. IJESI publishes research articles and reviews within the whole field Engineering Science and Technology, new teaching methods, assessment, validation and the impact of new technologies and it will continue to provide information on the latest trends and developments in this ever-expanding subject. The publications of papers are selected through double peer reviewed to ensure originality, relevance, and readability. The articles published in our journal can be accessed online.
International Journal of Engineering and Science Invention (IJESI) is an international journal intended for professionals and researchers in all fields of computer science and electronics. IJESI publishes research articles and reviews within the whole field Engineering Science and Technology, new teaching methods, assessment, validation and the impact of new technologies and it will continue to provide information on the latest trends and developments in this ever-expanding subject. The publications of papers are selected through double peer reviewed to ensure originality, relevance, and readability. The articles published in our journal can be accessed online.
The ionic strength of a solution is a measure of the concentration of ions in that solution. Ionic compounds, when dissolved in water, dissociate into ions. The total electrolyte concentration in solution will affect important properties such as the dissociation constant or the solubility of different salts
What can you tell us about the chemical reactions that go into a fireworks display?
Traditionally, three reagents, potassium nitrate, carbon, and sulfur, make gunpowder. You're doing a combustion reaction out of those types of materials that create
this detonation explosion.
Molecule selective electrode system and bio sensorMayurMarvaniya1
Electrodes designed for the detection of molecules instead of ions
Biosensor: A biosensor is an analytical device which converts the biological signal into a measurable electrical signal.
Professor Leland C Clark is the father of Biosenor. Professor Leland C Clark 1918–2005
Conductometric titration is a type of titration in which the electrolytic conductivity of the reaction mixture is continuously monitored as one reactant is added. The equivalence point is the point at which the conductivity undergoes a sudden change. ... Example: titration of an HCl solution with the strong base NaOH.
When you design your product, you put a lot of money, energy and consideration into achieving the best possible function, good appearance and high reliability. Corrosion, wear and fatigue resistance may not be the first factors you consider.
However, material selection is crucial to obtain a long service life and to avoid damage such as operation failure – for instance due to inadequate mechanical strength - or unacceptable appearance due to corrosion products.
If you choose the correct materials for your product from the beginning, you can prevent damage deriving from corrosion, wear and mechanical impact. In many cases, you may completely avoid corrosion by choosing a resistant material for its actual application environment.
Lithium aluminium hydride (LiAlH4) is widely used in organic chemistry as a reducing agent. ... Often as a solution in diethyl ether and followed by an acid workup, it will convert esters, carboxylic acids, acyl chlorides, aldehydes, and ketones into the corresponding alcohols.
Multi-source connectivity as the driver of solar wind variability in the heli...Sérgio Sacani
The ambient solar wind that flls the heliosphere originates from multiple
sources in the solar corona and is highly structured. It is often described
as high-speed, relatively homogeneous, plasma streams from coronal
holes and slow-speed, highly variable, streams whose source regions are
under debate. A key goal of ESA/NASA’s Solar Orbiter mission is to identify
solar wind sources and understand what drives the complexity seen in the
heliosphere. By combining magnetic feld modelling and spectroscopic
techniques with high-resolution observations and measurements, we show
that the solar wind variability detected in situ by Solar Orbiter in March
2022 is driven by spatio-temporal changes in the magnetic connectivity to
multiple sources in the solar atmosphere. The magnetic feld footpoints
connected to the spacecraft moved from the boundaries of a coronal hole
to one active region (12961) and then across to another region (12957). This
is refected in the in situ measurements, which show the transition from fast
to highly Alfvénic then to slow solar wind that is disrupted by the arrival of
a coronal mass ejection. Our results describe solar wind variability at 0.5 au
but are applicable to near-Earth observatories.
Observation of Io’s Resurfacing via Plume Deposition Using Ground-based Adapt...Sérgio Sacani
Since volcanic activity was first discovered on Io from Voyager images in 1979, changes
on Io’s surface have been monitored from both spacecraft and ground-based telescopes.
Here, we present the highest spatial resolution images of Io ever obtained from a groundbased telescope. These images, acquired by the SHARK-VIS instrument on the Large
Binocular Telescope, show evidence of a major resurfacing event on Io’s trailing hemisphere. When compared to the most recent spacecraft images, the SHARK-VIS images
show that a plume deposit from a powerful eruption at Pillan Patera has covered part
of the long-lived Pele plume deposit. Although this type of resurfacing event may be common on Io, few have been detected due to the rarity of spacecraft visits and the previously low spatial resolution available from Earth-based telescopes. The SHARK-VIS instrument ushers in a new era of high resolution imaging of Io’s surface using adaptive
optics at visible wavelengths.
THE IMPORTANCE OF MARTIAN ATMOSPHERE SAMPLE RETURN.Sérgio Sacani
The return of a sample of near-surface atmosphere from Mars would facilitate answers to several first-order science questions surrounding the formation and evolution of the planet. One of the important aspects of terrestrial planet formation in general is the role that primary atmospheres played in influencing the chemistry and structure of the planets and their antecedents. Studies of the martian atmosphere can be used to investigate the role of a primary atmosphere in its history. Atmosphere samples would also inform our understanding of the near-surface chemistry of the planet, and ultimately the prospects for life. High-precision isotopic analyses of constituent gases are needed to address these questions, requiring that the analyses are made on returned samples rather than in situ.
Richard's entangled aventures in wonderlandRichard Gill
Since the loophole-free Bell experiments of 2020 and the Nobel prizes in physics of 2022, critics of Bell's work have retreated to the fortress of super-determinism. Now, super-determinism is a derogatory word - it just means "determinism". Palmer, Hance and Hossenfelder argue that quantum mechanics and determinism are not incompatible, using a sophisticated mathematical construction based on a subtle thinning of allowed states and measurements in quantum mechanics, such that what is left appears to make Bell's argument fail, without altering the empirical predictions of quantum mechanics. I think however that it is a smoke screen, and the slogan "lost in math" comes to my mind. I will discuss some other recent disproofs of Bell's theorem using the language of causality based on causal graphs. Causal thinking is also central to law and justice. I will mention surprising connections to my work on serial killer nurse cases, in particular the Dutch case of Lucia de Berk and the current UK case of Lucy Letby.
Richard's aventures in two entangled wonderlandsRichard Gill
Since the loophole-free Bell experiments of 2020 and the Nobel prizes in physics of 2022, critics of Bell's work have retreated to the fortress of super-determinism. Now, super-determinism is a derogatory word - it just means "determinism". Palmer, Hance and Hossenfelder argue that quantum mechanics and determinism are not incompatible, using a sophisticated mathematical construction based on a subtle thinning of allowed states and measurements in quantum mechanics, such that what is left appears to make Bell's argument fail, without altering the empirical predictions of quantum mechanics. I think however that it is a smoke screen, and the slogan "lost in math" comes to my mind. I will discuss some other recent disproofs of Bell's theorem using the language of causality based on causal graphs. Causal thinking is also central to law and justice. I will mention surprising connections to my work on serial killer nurse cases, in particular the Dutch case of Lucia de Berk and the current UK case of Lucy Letby.
A brief information about the SCOP protein database used in bioinformatics.
The Structural Classification of Proteins (SCOP) database is a comprehensive and authoritative resource for the structural and evolutionary relationships of proteins. It provides a detailed and curated classification of protein structures, grouping them into families, superfamilies, and folds based on their structural and sequence similarities.
The increased availability of biomedical data, particularly in the public domain, offers the opportunity to better understand human health and to develop effective therapeutics for a wide range of unmet medical needs. However, data scientists remain stymied by the fact that data remain hard to find and to productively reuse because data and their metadata i) are wholly inaccessible, ii) are in non-standard or incompatible representations, iii) do not conform to community standards, and iv) have unclear or highly restricted terms and conditions that preclude legitimate reuse. These limitations require a rethink on data can be made machine and AI-ready - the key motivation behind the FAIR Guiding Principles. Concurrently, while recent efforts have explored the use of deep learning to fuse disparate data into predictive models for a wide range of biomedical applications, these models often fail even when the correct answer is already known, and fail to explain individual predictions in terms that data scientists can appreciate. These limitations suggest that new methods to produce practical artificial intelligence are still needed.
In this talk, I will discuss our work in (1) building an integrative knowledge infrastructure to prepare FAIR and "AI-ready" data and services along with (2) neurosymbolic AI methods to improve the quality of predictions and to generate plausible explanations. Attention is given to standards, platforms, and methods to wrangle knowledge into simple, but effective semantic and latent representations, and to make these available into standards-compliant and discoverable interfaces that can be used in model building, validation, and explanation. Our work, and those of others in the field, creates a baseline for building trustworthy and easy to deploy AI models in biomedicine.
Bio
Dr. Michel Dumontier is the Distinguished Professor of Data Science at Maastricht University, founder and executive director of the Institute of Data Science, and co-founder of the FAIR (Findable, Accessible, Interoperable and Reusable) data principles. His research explores socio-technological approaches for responsible discovery science, which includes collaborative multi-modal knowledge graphs, privacy-preserving distributed data mining, and AI methods for drug discovery and personalized medicine. His work is supported through the Dutch National Research Agenda, the Netherlands Organisation for Scientific Research, Horizon Europe, the European Open Science Cloud, the US National Institutes of Health, and a Marie-Curie Innovative Training Network. He is the editor-in-chief for the journal Data Science and is internationally recognized for his contributions in bioinformatics, biomedical informatics, and semantic technologies including ontologies and linked data.
Earliest Galaxies in the JADES Origins Field: Luminosity Function and Cosmic ...Sérgio Sacani
We characterize the earliest galaxy population in the JADES Origins Field (JOF), the deepest
imaging field observed with JWST. We make use of the ancillary Hubble optical images (5 filters
spanning 0.4−0.9µm) and novel JWST images with 14 filters spanning 0.8−5µm, including 7 mediumband filters, and reaching total exposure times of up to 46 hours per filter. We combine all our data
at > 2.3µm to construct an ultradeep image, reaching as deep as ≈ 31.4 AB mag in the stack and
30.3-31.0 AB mag (5σ, r = 0.1” circular aperture) in individual filters. We measure photometric
redshifts and use robust selection criteria to identify a sample of eight galaxy candidates at redshifts
z = 11.5 − 15. These objects show compact half-light radii of R1/2 ∼ 50 − 200pc, stellar masses of
M⋆ ∼ 107−108M⊙, and star-formation rates of SFR ∼ 0.1−1 M⊙ yr−1
. Our search finds no candidates
at 15 < z < 20, placing upper limits at these redshifts. We develop a forward modeling approach to
infer the properties of the evolving luminosity function without binning in redshift or luminosity that
marginalizes over the photometric redshift uncertainty of our candidate galaxies and incorporates the
impact of non-detections. We find a z = 12 luminosity function in good agreement with prior results,
and that the luminosity function normalization and UV luminosity density decline by a factor of ∼ 2.5
from z = 12 to z = 14. We discuss the possible implications of our results in the context of theoretical
models for evolution of the dark matter halo mass function.
Professional air quality monitoring systems provide immediate, on-site data for analysis, compliance, and decision-making.
Monitor common gases, weather parameters, particulates.
insect taxonomy importance systematics and classification
Metal organic framework
1. USES OF METAL ORGANIC FRAMEWORKS AS
CHEMICAL SENSOR
SUBMITTED BY
MAYUR HARSUKHBHAI MARVANIYA
MSc CHEMISTRY(SEM-2)
20MSC01014
2. METAL Organic FRAMEWORKS
DEFINITION
MOFs are compounds consisting of metal ions or
clusters coordinated to organic ligands to form
one two or three dimensional structures they are
subclass of coordination polymers .
These hybrid structures can be porous or non
porous and offer manifold functionalities.
4. APPLICATIONS OF MOFs
Gas storage (hydrogen , methane).
Carbon Dioxide capture separation of CO2 from
flue gas.
MOFs have adsorption properties and can
increase the performance of heat exchanging
systems i.e. in industrial cooling systems.
5. APPLICATIONS OF MOFs
Selective gas adsorption .
Useful gas separation
Catalysis due to active metal sites.
Used in the preparation of enantio pure
compound.
6. Inorganic Anion Sensing
The cyanide ion (CN−) is another important
contaminant in water, as it is one of the most toxic
and lethal pollutants presently occurring in nature.
The Ghosh group reported on a selective and
sensitive fluorescent senor for the aqueous-
phase detection of CN− using an MOF-based
system.
In this study, a post-synthetic modification of ZIF-
90 with the specific recognition sites for CN− was
applied.
7. Heavy Metal Ion Sensing
Heavy metal ions are one of the
nonbiodegradable pollutants in the water
environment.
Therefore, many MOF-based sensors have been
reported for heavy metal ions detection in water.
Reported on a highly sensitive and selective
fluorescent MOF-based probe for copper ion
(Cu2+) detection.
Excellent selectivity for sensing Cu2+ ions was
encapsulated into a zeolitic imidazolate
8. Ion Sensing
Lead ion (Pb2+) is one of the most toxic and
commonly found heavy metal ions in aquatic
ecosystems. The monitoring of Pb2+, especially
trace amounts of Pb2+ in the water environment,
is important to the public health.
The He group designed a detection strategy to
detect Pb2+ using Pd–Pt alloy-modified Fe-MOFs
(Fe-MOFs/PdPt NPs) with hairpin DNA
immobilized on the surface as a signal tag . As
shown in Fig. a streptavidin-modified reduced
graphene oxide-tetraethylene pentamine-gold
nanoparticle (rGO-TEPA-Au) composite serves as
the sensor platform for DNAzyme immobilization.
