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Friday, January 11, 2019
A Small Margin Of Error
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[ASAP] Highly Ordered Polypeptide with UCST Phase Separation Behavior
Journal of the American Chemical Society
DOI: 10.1021/jacs.8b10168
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An application of advanced hair-save processes in leather industry as the reason of formation of keratinous waste: few peculiarities of its utilisation
Abstract
The application of more environmentally friendly hide and skin unhairing technologies in leather processing results in a significant increase in keratin waste. There are currently two most promising hair-saving unhairing methods: enzymatic and hair immunisation. The complete use of hair-saving unhairing methods in the leather industry will lead to the formation of approximately 143 thousand tons of hair/wool waste annually, which will require disposal. The disposal of keratin wastes from the leather industry has not been adequately studied, bearing in mind the possible amount of such wastes that will be produced in the future. Unfortunately, existing studies pay little attention to the method of unhairing, even though the unhairing method has a vast influence on the properties of keratin in the obtained hair/wool wastes. Accordingly, the present research is an attempt to establish how the differently obtained keratin wastes behave following disposal. The obtained results have shown that waste wool is characterised by different behaviour during burial in soil, and the behaviour depends on the method of unhairing. This proposition is valid for waste wool bioresistance as well. It was concluded that the deterioration of any sort of keratinous waste from the leather industry should be investigated thoroughly before disposal by burial in landfills.
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Effect of electrolytes on the simultaneous electrochemical oxidation of sulfamethoxazole, propranolol and carbamazepine: behaviors, by-products and acute toxicity
Abstract
In this work, the effect of supporting electrolytes on the simultaneous electrochemical oxidation of the pharmaceuticals sulfamethoxazole (SMX), propranolol (PRO), and carbamazepine (CBZ) in aqueous solutions has been studied. Based on the identified by-products, the degradation mechanisms were proposed and the acute toxicity was evaluated for each electrolyte. Assays were carried out in batch mode in a 2 L undivided reactor using a niobium coated with boron-doped diamond (Nb/BDD) mesh anode and Ti cathode at 2.5 A in presence of different supporting electrolytes (Na2SO4, NaCl, or NaBr) at the same concentration of 7 mM. The degradation rates were higher in the assays with NaCl and NaBr. Reaction by-products were identified by gas chromatography–mass spectrometry. Indirect oxidation by electrogenerated reactive halogen species (RHS) was the main mechanism when halide ions were used as electrolytes. Ten by-products were detected using Na2SO4 as electrolyte, while 19 (12 non-halogenated and 7 halogenated) and 20 (10 non-halogenated and 10 halogenated) using NaCl and NaBr respectively. The proposed degradation pathways involve transformation (hydroxylation, deamination, desulfonation, and halogenation) and bond rupture to produce less molecular weight compounds and their further transformation until total degradation. Chlorinated and brominated by-products confirm halogenation reactions. The electrogenerated RHS presented a significant inhibition effect on Vibrio fischeri; nevertheless, acute toxicity was not presented using Na2SO4 as electrolyte and a pharmaceutical concentration of 5 μg/L. In this view, the role of the supporting electrolyte in electrochemical oxidation process is crucial since it strongly influence degradation rate, by-products, and acute toxicity.
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Laboratory bioassays on the response of honey bee ( Apis mellifera L.) glutathione S -transferase and acetylcholinesterase to the oral exposure to copper, cadmium, and lead
Abstract
In the present study, the influence of cadmium, copper, and lead on two enzymes often used as biomarkers in toxicological analysis was investigated. Bees were fed with 1 M sucrose solution containing 10-fold serial dilutions of CuCl2 (1000 mg L−1, 100 mg L−1, and 10 mg L−1), CdCl2 (0.1 mg L−1, 0.01 mg L−1, and 0.001 mg L−1), or PbCl2 (10 mg L−1, 1 mg L−1, and 0.1 mg L−1) during 48 h. Our results showed that the total glutathione S-transferase activity was not changed under the influence of cadmium and lead, and it was decreased with the highest concentration of copper. The level of gene expression of the three analyzed classes of glutathione S-transferase was significantly increased with increasing concentrations of copper and cadmium. Lead did not cause significant changes in glutathione S-transferase activity and gene expression, while it showed biphasic effect on acetylcholinesterase activity: lower concentration of lead, 0.1 mg L−1 inhibited and higher dose, 10 mg L−1 induced acetylcholinesterase activity in honey bees. Furthermore, our results showed a significant decrease of the acetylcholinesterase activity in honey bees treated with 0.001 and 0.01 mg L−1 CdCl2. Our results indicate the influence of cadmium, copper, and lead on GST and AChE in the honey bees. These results form the basis for future research on the impact of metallic trace element pollution on honey bees.
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Florida GOP Rep. Francis Rooney set to co-chair bipartisan House climate change caucus
https://washex.am/2VLUYJG by Josh Siegel | January 11, 2019 03:24 PM Print this article Sign up for Daily on Energy SUBMIT Rep. Francis Rooney, R-Fla., has been appointed co-chairman of the Climate Solutions Caucus, positioning him as the leading House Republican advocating for government policy to combat global warming. The caucus and its Democratic co-chairman, Rep. Ted [...]
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Sea Level Rise (SLR) Satellite Altimetry—Fit for Purpose?
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Li4Na2CsB7O14: a new edge-sharing [BO4]5− tetrahedra containing borate with high anisotropic thermal expansion
Chem. Commun., 2019, Advance Article
DOI: 10.1039/C8CC09422E, Communication
DOI: 10.1039/C8CC09422E, Communication
Miriding Mutailipu, Min Zhang, Hao Li, Xiao Fan, Zhihua Yang, Shifeng Jin, Gang Wang, Shilie Pan
Li4Na2CsB7O14, a new edge-sharing [BO4]5− tetrahedra containing borate with high anisotropic thermal expansion, was obtained under the atmospheric pressure conditions.
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The content of this RSS Feed (c) The Royal Society of Chemistry
Li4Na2CsB7O14, a new edge-sharing [BO4]5− tetrahedra containing borate with high anisotropic thermal expansion, was obtained under the atmospheric pressure conditions.
To cite this article before page numbers are assigned, use the DOI form of citation above.
The content of this RSS Feed (c) The Royal Society of Chemistry
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How reliable is the Na metal as a counter electrode in Na-ion half cells?
Chem. Commun., 2019, Advance Article
DOI: 10.1039/C8CC07852A, Communication
DOI: 10.1039/C8CC07852A, Communication
Joanna Conder, Claire Villevieille
Despite the extensive research on Na-ion batteries little is known about the stability of the Na-metal counter electrode in a half-cell configuration.
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The content of this RSS Feed (c) The Royal Society of Chemistry
Despite the extensive research on Na-ion batteries little is known about the stability of the Na-metal counter electrode in a half-cell configuration.
To cite this article before page numbers are assigned, use the DOI form of citation above.
The content of this RSS Feed (c) The Royal Society of Chemistry
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Enzyme-assisted self-assembly within a hydrogel induced by peptide diffusion
Chem. Commun., 2019, Advance Article
DOI: 10.1039/C8CC09437C, Communication
DOI: 10.1039/C8CC09437C, Communication
Miryam Criado-Gonzalez, Jennifer Rodon Fores, Déborah Wagner, André Pierre Schröder, Alain Carvalho, Marc Schmutz, Eva Harth, Pierre Schaaf, Loïc Jierry, Fouzia Boulmedais
Peptide diffusion into an enzymatically active hydrogel induces the formation of a self-assembled network, changing the mechanical and chemical properties.
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The content of this RSS Feed (c) The Royal Society of Chemistry
Peptide diffusion into an enzymatically active hydrogel induces the formation of a self-assembled network, changing the mechanical and chemical properties.
To cite this article before page numbers are assigned, use the DOI form of citation above.
The content of this RSS Feed (c) The Royal Society of Chemistry
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Highly selective and reproducible electroanalysis for histidine in blood with turn-on responses at a potential approaching zero using tetrahedral copper metal organic frameworks
Chem. Commun., 2019, Advance Article
DOI: 10.1039/C8CC09562K, Communication
DOI: 10.1039/C8CC09562K, Communication
Yue Hua, Xiaoxia Lv, Yuanyuan Cai, Huan Liu, Shuai Li, Yuqi Wan, Hua Wang
Tetrahedral copper metal organic frameworks were fabricated for the electroanalysis of histidine with turn-on responses at a potential approaching zero.
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The content of this RSS Feed (c) The Royal Society of Chemistry
Tetrahedral copper metal organic frameworks were fabricated for the electroanalysis of histidine with turn-on responses at a potential approaching zero.
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The content of this RSS Feed (c) The Royal Society of Chemistry
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Which is it?! ‘Global warming’ causes more illegal immigration — BUT Illegal Immigration causes less ‘global warming’
As official Washington battles over the issue of illegal immigration and how to respond to, climate activists are promoting very confusing contradictions when it comes to immigration and climate change. See: Sen. Bernie Sanders declares biggest threat facing the US was climate change, not immigration – warns Earth may become "uninhabitable in the not-so-distant future." [...]
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[ASAP] Efficient Photoelectrochemical Hydrogen Evolution Using Pseudocapacitive NiO/Si Junction with Misaligned Energy Levels
The Journal of Physical Chemistry C
DOI: 10.1021/acs.jpcc.8b11694
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[ASAP] Graphamine: Amine-Functionalized Graphane for Intrinsic Anhydrous Proton Conduction
The Journal of Physical Chemistry C
DOI: 10.1021/acs.jpcc.8b09001
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[ASAP] Self-Encapsulation of Silicene in Cubic Diamond Si: Topological Semimetal in Covalent Bonding Networks
The Journal of Physical Chemistry C
DOI: 10.1021/acs.jpcc.8b10475
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[ASAP] Morphology of Ti on Monolayer Nanocrystalline Graphene and Its Unexpectedly Low Hydrogen Adsorption
The Journal of Physical Chemistry C
DOI: 10.1021/acs.jpcc.8b09161
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[ASAP] Synergistic Effects of Mg and N Cosubstitution on Enhanced Dehydrogenation Properties of LiBH4: A First-Principles Study
The Journal of Physical Chemistry C
DOI: 10.1021/acs.jpcc.8b08198
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[ASAP] Optical Whispering Gallery-Enabled Enhanced Photovoltaic Efficiency of CdS–CuInS2 Thin Film-Sensitized Whisperonic Solar Cells
The Journal of Physical Chemistry C
DOI: 10.1021/acs.jpcc.8b09292
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[ASAP] CO2 Adsorption on CaO(001): Temperature-Programmed Desorption and Infrared Study
The Journal of Physical Chemistry C
DOI: 10.1021/acs.jpcc.8b11415
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[ASAP] Uncovering New Buckled Structures of Bilayer GaN: A First-Principles Study
The Journal of Physical Chemistry C
DOI: 10.1021/acs.jpcc.8b09973
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[ASAP] Correction to “Photophysical Properties of Thermally Activated Delayed Fluorescent Materials upon Distortion of Central Axis of Donor Moiety”
The Journal of Physical Chemistry C
DOI: 10.1021/acs.jpcc.8b12429
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[ASAP] Sequence-Regulated Supracolloidal Copolymers via Copolymerization-Like Coassembly of Binary Mixtures of Patchy Nanoparticles
ACS Nano
DOI: 10.1021/acsnano.8b08431
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[ASAP] Exfoliated Graphene Leads to Exceptional Mechanical Properties of Polymer Composite Films
ACS Nano
DOI: 10.1021/acsnano.8b04734
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[ASAP] Spider-Web-Inspired Nanocomposite-Modified Separator: Structural and Chemical Cooperativity Inhibiting the Shuttle Effect in Li–S Batteries
ACS Nano
DOI: 10.1021/acsnano.8b07491
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[ASAP] Reshaping Dynamics of Gold Nanoparticles under H2 and O2 at Atmospheric Pressure
ACS Nano
DOI: 10.1021/acsnano.8b08530
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