The chemistry of elements in the periodic table, created by Mendeleev in 1869 before the discovery of the electron and the knowledge of quantum mechanics, can be explained in terms of their valence electrons and the orbitals they occupy. For example, noble gas atoms, with filled [....] » Read More
Heterogeneous photocatalysis is an advanced oxidation process which exploits the property of irradiated semiconductors to generate electrons and holes which in turn initiate useful redox reactions. The classical field of application of photocatalysis has been the environmental re [....] » Read More
The pollution of water sources with petroleum products is one of the most important and actual ecological problem. Every year, oil spills create a serious damage to the ecosystem, which leads to the death of plants, algae, birds and fish. At the same time, wastewater from steel a [....] » Read More
Carbohydrates are among the main nutritious components of human diet. Normally, the blood sugar level after meal highly responses to the digestion of carbohydrates, mainly starch. They are initially hydrolysed by salivary and pancreatic α-amylase to reducing into oligosacch [....] » Read More
Chlorophylls are tetrapyrrole derivatives with coplanar system of conjugated double bonds which form an aromatic structure with delocalized electron density at the orbitals level. Typically found in higher plants are chlorophyll-a and chlorophyll-b, in various proportions dependi [....] » Read More
Betainized Compounds are a group of low molecular weight compounds, highly soluble in water, derived from amino acids in which the nitrogen atom is fully methylated. These substances are ubiquitous in the vegetal world and tend to accumulate, through specific biosynthetic pathway [....] » Read More
Telomeres are terminal fragments of chromosome composed of highly repetitive sequences of nucleic bases (TTAGGG):(CCCTAA). We can distinguish guanine rich (G-rich) and cytosine-rich (C-rich) strands within the double stranded telomeric DNA. The biological role of telomere is prot [....] » Read More
Separation membranes allow purification of hydrogen from gas mixtures produced by various methods, such as the reformation of natural gas, coal gasification, or the gasification of municipal waste. Hydrogen separated in this way may be used in fuel cells to generate electricity o [....] » Read More
The stability of Perovskite materials life time by using Nano-polymer sandwich structure is investigated. A Perovskite composite is used consisting of the structure FAxMA1-xPbI3. The x ratios varied as 0.8,0.5 and 0.2. Two different polymers are used namely PMMA and Polyaniline. [....] » Read More
A food allergy occurs when the body’s immune system sees a certain food as harmful and reacts by triggering an allergic reaction. There are two categories of food allergy. Immunoglobulin E (IgE) mediated is where symptoms result from the body’s immune system making an [....] » Read More
Sustainability issues in Textiles have paved way for exploration of many new fibers from renewable sources. Many researches are done to refine the extraction process, test and identify the hidden properties and to characterize the fiber for its unique property. By default, all th [....] » Read More
K-peptide (GILQINSRW) – a short 9 amino acid fragment of the hen egg white lysozyme has the ability to form amyloid structures, thus it can serve as a model for studies of interactions between pathological amyloid structures and various compounds generally known as osmolyte [....] » Read More
Conductive polymers derivates, such as poly-o-methoxyaniline (POMA), have been broadly using in different applications due to their similar characteristic of polyaniline. POMA can intercalate into V2O5 matrix to improve their structural and electrical properties, and thin films o [....] » Read More
Spirooxindoles are exceptional and versatile scaffolds, and thus have been extensively studied in the fields of synthetic and pharmaceutical chemistry. The unique three-dimensional spiro system may be the main cause for the bioactivities of spirooxindoles. Especially, spirooxindo [....] » Read More
Coumarin has an important place in medicinal chemistry, as molecules incorporating the coumarin scaffold show a broad spectrum of pharmacological activities, including anticancer, antimicrobial, antiviral, antioxidant, anticoagulant, anti-inflammatory, and anti-enzymatic. The aim [....] » Read More
Chromeno[4,3-b]quinolines have emerged as an important class of tetracyclic O- and N-heterocyclic compounds because of their broad biological activities. Particularly, the chromenoquinoline skeleton is found in a variety of potential bioactive entities, such as ?-selective estrog [....] » Read More
In a context of increasing the world’s population and resources consumption one of the greatest challenges of our society is to produce innovative materials by valorization of the renewable resources with the attempt to diminish the dependency of European companies on petro [....] » Read More
N-linked glycopeptides are naturally occurring glycosyl amides involved in various biological events e.g., processes on the cell surface. Synthesis of N-linked glycopeptides is intrinsically challenging since it requires control of stereoselectivity. Typically, in such glycoconju [....] » Read More
The main objective of a lubricant is to reduce frection an wear. But also, it is responsible for heat evacuation. Taking into account their nature, there are mineral, synthetical, vegetal or animal lubricants. Untill the XIX-th century, the manufacturing process of lubricants has [....] » Read More
Title : Theoretical modeling in organic nanophotonics
Alexander Bagaturyants, Russian Academy of Science, Russian Federation
Multiscale atomistic simulation methods are applied to studying excited molecules in organic materials and their interaction with neighboring molecules. The formation of exciplexes at the interface between layers of organic molecules in multilayer structures, typical for organic [....] » Read More
Title : Metallurgical Chemistry
Fathi Habashi, Laval University, Canada
Metallurgical Chemistry gives a brief history of the development of metal extraction technology, then discusses the metal and mineral industries, and physical and physicochemical methods of enriching ores. Various methods of recovering metals from ore: hydrometallurgy, pyrom [....] » Read More
Title : The application of microwave generated steam ovens for the decontamination of respirators and face masks
Victor John Law, University College Dublin, Ireland
During the two influenza pandemic’s of this century (caused by H1N1 and SARS-Cov-2), experimental microwave generated steam (MGS), has shown potential, for decontamination of respirators and surgical masks. Recent review articles of the decontamination of single-use face re [....] » Read More
Title : Shape reversibility and the role of thermomechanical treatments in shape memory alloys
Osman Adiguzel, Firat University, Turkey
Shape memory effect is a peculiar property exhibited by a certain alloy systems in the β-phase fields, and result of thermal and mechanical processes. These alloys have dual characteristics called thermoelasticity and superelasticity, governed by successive thermal and stres [....] » Read More
Title : Ions and molecules with internal degrees of freedom
Klemen Bohinc, University of Ljubljana, Slovenia
Interactions in electrolyte solutions are of fundamental importance in many chemical and biological systems. These interactions can be altered by the presence of charged molecules/ions, which possess spatially distributed charge. In this presentation, I will consider the in [....] » Read More
Title : Low frequency magnetic scanning device for determining the quality of moving metallurgical raw materials
Svetlana V Kochemirovskaia, Peter the Great St. Petersburg Polytechnic University, Russian Federation
The development of an algorithm for automating the process of measuring the magnetic properties of macroscopic objects in motion is an important problem in various industries, especially in ferrous metallurgy, and in the factories where ferrous scrap is a strategic raw material. [....] » Read More
Title : Influence of atmospheric humidity on the results of determining the age of handwritten inscriptions on questioned documents
Kseniia O Ershova, Nanotechnology Research and Education Centre of the Russian Academy of Sciences, Russian Federation
Forensic technical examination of documents is in demand to combat the falsification of a document by participants in judicial disputes. Determining the actual date when a certain inscription appeared on a piece of paper is one of the most important and difficult forensic tasks. [....] » Read More
Title : Safety issues of lithium-ion cells
Marita Piglowska, Poznan University of Technology, Poland
Personal electronic devices, electric cars, computers, and emergency power systems all require energy storage. Modern science offers quite a lot of them (electrochemical cells, hydroelectric power stations or thermal stores, flywheels, etc.), but there is still work to improve th [....] » Read More
Title : Optimization and validation of HPLC-DAD method for the quantification of curcuminoids in turmeric (Curcuma Longa)
Ayse Sap, Firat University, Turkey
Curcumin and its derivatives named curcuminoids are a naturally occurring polyphenolic compounds extensively marketed as a nutraceutical. The wide therapeutic potential of curcumin is highly explored by the authors. Therefore, many inventions were made by pharma-industries for it [....] » Read More
Title : Improving the fatigue of newly designed mechanical system subjected to repeated impact loading
Seongwoo Woo, Addis Ababa Science & Technology University, Ethiopia
To Improving the fatigue of newly designed mechanical system subjected to repeated loading, this paper develops parametric accelerated life testing (ALT) as a systematic reliability method to produce the reliability quantitative (RQ) specifications—mission cycle&mdash [....] » Read More
Title : Interaction of anticancer drug gemcitabine with human plasma protein: Experimental and computational analysis
Mohd Sajid Ali, King Saud University, Saudi Arabia
The interaction of common anticancer drug gemcitabine with human serum albumin (HSA), an important plasma protein, has been studied in details. A slight hyperchromic shift in the difference UV absorption spectra of HSA on the addition of gemcitabine gave a primary idea of the pos [....] » Read More
Title : Is it possible to remove SARS-CoV-2 with membranes in water and wastewater?
Yasemin Yildiz, Sakarya University, Turkey
Several agents around the world have caused the pandemic. Looking at the last 17 years, it is seen that there have been three major outbreaks caused by the coronavirus. The World Health Organization (WHO) announced on March 11, 2020, that the most recent epidemic, SARS-CoV 2, had [....] » Read More
Title : Use of molecularly imprinted polymers (MIPs) and magnetic molecularly imprinted polymers (mag-MIPs) in flowing atmospheric-pressure afterglow mass spectrometry (FAPA-MS)
Maria Guc, Adam Mickiewicz University in Poznan, Poland
Polymers with a molecular imprint, selective for the following compounds were obtained: flavonoids – quercetin; female sex hormones – estrone and β-estradiol; non-steroidal inflammatory drugs – naproxen, diclofenac, and ibuprofen; herbicides – 2,4-dic [....] » Read More
Title : Determination of labile copper species in water samples based on solid-phase extraction with ion-imprinted polymer
Tanya Yordanova, Sofia University St. Kliment Ohridski, Bulgaria
The toxicity, bioavailability and mobility of copper in aquatic environment strongly depend on its speciation rather than on total Cu concentration. Various approaches have been developed for quantitation of mobile and bioavailable metal fractions e.g. methods based on voltammetr [....] » Read More
Title : New polymeric ionic liquid as a smart material for As(V)/As(III) speciation analysis
Ivanka Dakova, University of Sofia “St. Kliment Ohridski”, Bulgaria
During the last years, the introduction of the functional groups such as ionic liquids into polymers is giving rise to a new class of smart materials called polymeric ionic liquids (PILs). Due to their specific properties emanating from the ionic liquid units and their intrinsic [....] » Read More
Title : Adsorption of chromium(III) and manganese(II) on PVA-PEO-TEOS membranes doped with gold nanoparticles: Equilibrium and kinetic study, analytical application for simultaneous speciation of chromium and manganese
Penka Vasileva, University of Sofia “St. Kliment Ohridski”, Bulgaria
Trivalent chromium and divalent manganese adsorption was studied in a batch mode with PVA-PEO-TEOS membranes doped with starch-coated gold nanoparticles (Au-Starch NPs) at 298.15 K. Equilibrium and kinetic behaviours, as well as analytical application of the hybrid nanocomposite [....] » Read More
Title : Ion imprinted polymers for uranium determination by ICP-MS
Irina Karadjova, University of Sofia “St. Kliment Ohridski”, Bulgaria
Recently, there has been an increased demand for developing methods that are suitable for separation and trace level determination of uranium from various types of samples including surface waters, food, biological samples and industrial effluents. This demand is two-fold, firstl [....] » Read More
Title : Optimization of rhodanine derivatives synthesis in deep eutectic solvents using different green techniques
Maja Molnar, Josip Juraj Strossmayer University of Osijek, Croatia (Hrvatska)
Increasing need in drug consumption during last few decades, lead to the development of the pharmaceutical industry, thus increasing the synthesis of compounds with positive effects on human health. Mass production leads to the increased waste production and environmental polluti [....] » Read More
Title : The influence of protein precipitation methods on uncontrolled conversion of cannabidiol to 9 tetrahydrocannabinol during analysis of plasma samples
Michal Rombel, Maria Curie-Sklodowska University, Poland
The growing popularity of supplements containing cannabidiol (CBD), mainly CBD oils, in self-medication of humans and the increased interest in this compound in different preclinical and clinical trials stimulates the development of procedures of CBD analysis in plasma for the st [....] » Read More