4,626,225 results match your criteria Chemistry & Biodiversity[Journal]


Establishment of a Mouse Model for Post-Inflammatory Hyperpigmentation.

Pigment Cell Melanoma Res 2020 Jul 4. Epub 2020 Jul 4.

Department of Dermatology, Yamagata University, Faculty of Medicine, Yamagata, Japan.

Post-inflammatory hyperpigmentation (PIH) is a common cutaneous condition that can cause a disfigured appearance. However, the pathophysiology of PIH remains poorly understood, at least in part, because an appropriate animal model for research has not been established. In order to analyze the pathomechanism of PIH, we successfully induced PIH in a hairless version of transgenic mice (hk14-SCF Tg/HRM) that have a human-type epidermis containing melanin by repeated hapten application of 2,4-dinitrofluorobenzene. Read More

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http://dx.doi.org/10.1111/pcmr.12911DOI Listing

Ultrastructural investigation of acidocalcisomes and ATPase activity in yeasts Candida guillermondii NP-4 as "complementary" stress-targets.

Lett Appl Microbiol 2020 Jul 4. Epub 2020 Jul 4.

Department of Biochemistry, Microbiology and Biotechnology, Yerevan State University, 1 A. Manoogyan Str, 0025, Yerevan, Armenia.

As a result of electron microscopic studies of morphogenesis in yeasts Candida guilliermondii NP-4, the formation of new structures of volutin acidocalcisomes has been established within the cell cytoplasm. Under influence of X-irradiation the changes in morphometric and electron-dense properties of yeast cells were identified: in yeast cytoplasm, the electron-dense volutin granules were increased up to 400 nm in size. After 24 h post-irradiation incubation of yeasts the large volutin pellets are fragmented into smaller number particles in size up to 25-150 nm. Read More

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http://dx.doi.org/10.1111/lam.13348DOI Listing

Release behavior of metals from tin-lined copper cookware into food simulants during cooking and cold storage.

Environ Sci Pollut Res Int 2020 Jul 5. Epub 2020 Jul 5.

Department of Food Science and Technology, School of Nutrition Sciences and Food Technology, Research Center for Environmental Determinants of Health (RCEDH), Health Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran.

The copper pots with an inner coating layer of tin have been remarkably used in many countries for a long time. In this study, leaching of some metals from tin-lined copper pots into food simulators at different pHs (4, 5.5, 7, and 8. Read More

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http://dx.doi.org/10.1007/s11356-020-09970-zDOI Listing

Spatial-temporal variability of aerosol sources based on chemical composition and particle number size distributions in an urban settlement influenced by metallurgical industry.

Environ Sci Pollut Res Int 2020 Jul 5. Epub 2020 Jul 5.

Department of Public Health Sciences, University of Rochester Medical Center, 265 Crittenden Boulevard, Rochester, NY, 14642-0708, USA.

The Moravian-Silesian region of the Czech Republic with its capital city Ostrava is a European air pollution hot spot for airborne particulate matter (PM). Therefore, the spatiotemporal variability assessment of source contributions to aerosol particles is essential for the successful abatement strategies implementation. Positive Matrix Factorization (PMF) was applied to highly-time resolved PM chemical composition (1 h resolution) and particle number size distribution (PNSD, 14 nm - 10 μm) data measured at the suburban (Ostrava-Plesná) and urban (Ostrava-Radvanice) residential receptor sites in parallel during an intensive winter campaign. Read More

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http://dx.doi.org/10.1007/s11356-020-09694-0DOI Listing

High crosslinked sodium carboxyl methylstarch-g-poly (acrylic acid-co-acrylamide) resin for heavy metal adsorption: its characteristics and mechanisms.

Environ Sci Pollut Res Int 2020 Jul 5. Epub 2020 Jul 5.

College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, 610500, People's Republic of China.

A lower expansive heavy metal adsorbent, high crosslinked sodium carboxyl methylstarch-g-poly (acrylic acid-co-acrylamide) resin (HCAA), has been prepared by enhancing the crosslinking degree of the traditional water-absorbing polymer under the graft copolymerization reaction. Further heavy metal adsorption experiments, morphology analysis, and structure characteristic observations indicate that HCAA resin has an excellent heavy metal adsorption properties for Cr, Cu, Ni, and Zn of 80.08, 158. Read More

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http://dx.doi.org/10.1007/s11356-020-09945-0DOI Listing

The effects of a short-term exposure to propiconazole in zebrafish (Danio rerio) embryos.

Environ Sci Pollut Res Int 2020 Jul 4. Epub 2020 Jul 4.

Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, 100193, China.

Propiconazole (PCZ) is a widely used fungicide around the world and was frequently detected in surface waters, which would pose risk to aquatic organisms. Previous studies indicated that PCZ has high toxicity to different kinds of fish. However, most of the studies focus on the toxicity and mechanisms of PCZ to adult fish, the potential toxicity mechanism of PCZ to fish embryos is still poorly understood. Read More

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http://dx.doi.org/10.1007/s11356-020-09968-7DOI Listing

Facile preparation of L-cysteine-modified cellulose microspheres as a low-cost adsorbent for selective and efficient adsorption of Au(III) from the aqueous solution.

Environ Sci Pollut Res Int 2020 Jul 4. Epub 2020 Jul 4.

State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China.

A facile method to synthesize adsorbent based on cellulose modified by amino acid was developed. The novel L-cysteine-functionalized adsorbent for Au(III) recovery was synthesized via radiation grafting technique. Glycidyl methacrylate (GMA) was grafted on the surface of microcrystalline cellulose microsphere (MCC); next, ring-opening reaction was performed to immobilize L-cysteine. Read More

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http://dx.doi.org/10.1007/s11356-020-09789-8DOI Listing

Secondary metabolites from acridocarpus orientalis inhibits 4T1 cells and promotes mesenchymal stem cells (MSCs) proliferation.

Mol Biol Rep 2020 Jul 4. Epub 2020 Jul 4.

Laboratory for Stem Cell & Regenerative Medicine, Natural and Medical Sciences Research Center, University of Nizwa, P. O. Box: 33, Nizwa, PC, 616, Oman.

Among medicinal plants, Acridocarpus orientalis (AO) possesses a remarkable anti-cancer potential, possibly because of its anti-oxidant property. In this study, the leaf and stem extracts from AO were assessed to find the bioactive compound with selective anti-cancer properties. The MTT viability and live and dead assays revealed that around 80% and 98% of 4T1 cells survival were declined after 48 h incubation with leaf and stem extracts, respectively. Read More

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http://dx.doi.org/10.1007/s11033-020-05632-yDOI Listing

Gut microbiota and undigested food constituents modify toxin composition and suppress the genotoxicity of a naturally occurring mixture of Alternaria toxins in vitro.

Arch Toxicol 2020 Jul 4. Epub 2020 Jul 4.

Department of Food Chemistry and Toxicology, Faculty of Chemistry, University of Vienna, Währinger Str. 42, 1090, Vienna, Austria.

Molds of the genus Alternaria produce several mycotoxins, some of which may pose a threat for health due to their genotoxicity. Due to the lack of adequate toxicological and occurrence data, they are currently not regulated. Interactions between mycotoxins, gut microbiota and food constituents might occur after food ingestion, modifying the bioavailability and, therefore, overall toxicity of mycotoxins. Read More

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http://dx.doi.org/10.1007/s00204-020-02831-1DOI Listing

The cadmium tolerance development of poplar callus is influenced by silicon.

Ecotoxicology 2020 Jul 4. Epub 2020 Jul 4.

Department of Glycobiotechnology, Institute of Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 845 38, Bratislava, Slovakia.

Cadmium-tolerant plants were studied for their possible usage in phytoremediation techniques. However, their response to cadmium cations at a cellular level has not been properly studied. Silicon is a beneficial element that seems to change the plant's response to the Cd presence. Read More

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http://dx.doi.org/10.1007/s10646-020-02242-zDOI Listing

β-Cyclodextrin coated porous Pd@Au nanostructures with enhanced peroxidase-like activity for colorimetric and paper-based determination of glucose.

Mikrochim Acta 2020 Jul 4;187(8):425. Epub 2020 Jul 4.

Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, Anhui, 230009, People's Republic of China.

β-cyclodextrin-functionalized porous Pd@Au nanostructures (β-CD-Pd@Au) with intrinsic and enhanced peroxidase-like activity were successfully synthesized by a two-step method. The synthesized β-CD-Pd@Au can efficiently catalyze the oxidation of various substrates, such as 3,3',5,5'-tetramethylbenzidine (TMB), mixture of 4-amino antipyrine (4-AAP) and 3,5-dichloro-2-hydroxy acid sodium (DHBS) (4-AAP/DHBS), and mixture of 4-AAP and N-Ethyl-N-(3-sulfopropyl)-3-methyl-aniline sodium salt (TOPS) (4-AAP/TOPS), by HO to generate visual blue, purple, and pink color, respectively. The UV-vis absorbance peak of the three β-CD-Pd@Au catalyzed the chromogenic reaction system located at 650 nm, 510 nm, and 550 nm, respectively. Read More

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http://dx.doi.org/10.1007/s00604-020-04410-8DOI Listing

Extrahepatic metabolism of ibrutinib.

Invest New Drugs 2020 Jul 4. Epub 2020 Jul 4.

Division of Pharmacoepidemiology & Clinical Pharmacology, Faculty of Science, Department of Pharmaceutical Sciences, Utrecht University, Universiteitsweg 99, 3584 CG, Utrecht, The Netherlands.

Ibrutinib is a first-in-class Bruton's kinase inhibitor used in the treatment of multiple lymphomas. In addition to CYP3A4-mediated metabolism, glutathione conjugation can be observed. Subsequently, metabolism of the conjugates and finally their excretion in feces and urine occurs. Read More

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http://dx.doi.org/10.1007/s10637-020-00970-xDOI Listing

Correction to: Ultra-thin nanosheet-assembled accordion-like Ni-MOF for hydrazine hydrate amperometric sensing.

Mikrochim Acta 2020 Jul 4;187(8):426. Epub 2020 Jul 4.

School of Chemistry and Chemical Engineering, Institute for Innovative Materials and Energy, Yangzhou University, Yangzhou, Yangzhou, 225002, Jiangsu, People's Republic of China.

The published article is revised due to diagram errors. The authors express their sincere apology, and corrected Figure 2a (XPS), Figure S4 (IR), and Figure S7 (XPS) are given. Read More

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http://dx.doi.org/10.1007/s00604-020-04388-3DOI Listing

Cooperative foraging during larval stage affects fitness in Drosophila.

J Comp Physiol A Neuroethol Sens Neural Behav Physiol 2020 Jul 4. Epub 2020 Jul 4.

Department of Biology, University of Virginia, Charlottesville, VA, 22901, USA.

Cooperative behavior can confer advantages to animals. This is especially true for cooperative foraging which provides fitness benefits through more efficient acquisition and consumption of food. While examples of group foraging have been widely described, the principles governing formation of such aggregations and rules that determine group membership remain poorly understood. Read More

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http://dx.doi.org/10.1007/s00359-020-01434-6DOI Listing

Long-Term ACE Inhibitor/ARB Use Is Associated with Severe Renal Dysfunction and Acute Kidney Injury in Patients with severe COVID-19: Results from a Referral Center Cohort in the North East of France.

Clin Infect Dis 2020 Jul 5. Epub 2020 Jul 5.

Department of Molecular Medicine, Division of Biochemistry, Molecular Biology, Nutrition, and Metabolism, University Hospital of Nancy, Nancy, France.

Background: In patients with severe COVID-19, data are scarce and conflicting regarding whether chronic use of angiotensin-converting enzyme inhibitor (ACEI) or angiotensin receptor blocker (ARB) influences disease outcomes. In patients with severe COVID-19, we assessed the association between chronic ACEI/ARB use and the occurrence of kidney, lung, heart, and liver dysfunctions and the severity of the inflammatory reaction as evaluated by biomarkers kinetics, and their association with disease outcomes.

Methods: We performed a retrospective longitudinal cohort study on consecutive patients with newly diagnosed severe COVID-19. Read More

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http://dx.doi.org/10.1093/cid/ciaa677DOI Listing

Susceptibility of tick-borne encephalitis virus to inactivation by heat, acidic pH, chemical or UV treatment.

J Infect Dis 2020 Jul 5. Epub 2020 Jul 5.

Institute for Physiological Chemistry and Research Center for Emerging Infections and Zoonoses, University of Veterinary Medicine Hannover, Hannover, Germany.

Tick-borne encephalitis virus (TBEV) is a single-stranded, positive-sense RNA virus in the family Flaviviridae that is endemic in parts of Europe and Asia and can cause meningitis or encephalitis. Due to the disease severity, TBEV requires handling under heightened biosafety measures. The establishment and validation of inactivation procedures is a prerequisite for downstream analyses and management of occupational exposure. Read More

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http://dx.doi.org/10.1093/infdis/jiaa405DOI Listing

Selected essential oils and their mechanisms for therapeutic use against public health disorders. An overview.

Z Naturforsch C J Biosci 2020 Jul 6. Epub 2020 Jul 6.

Department of Pharmaceutical Chemistry, University of Vienna, Vienna, Austria.

Today, the numbers of people suffering from lifestyle diseases like diabetes, obesity, allergies and depression increases mainly in industrialised states. That does not only lower patients' quality of life but also severely stresses the health care systems of these countries. Essential oils (EO) have been in use as therapeutic remedies for centuries against various complaints, but still their effectiveness is being underestimated. Read More

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http://dx.doi.org/10.1515/znc-2020-0007DOI Listing

Use of ultrasound at a pilot scale to accelerate the ageing of sherry vinegar.

Ultrason Sonochem 2020 Jul 1;69:105244. Epub 2020 Jul 1.

Analytical Chemistry Department, Faculty of Sciences-IVAGRO, University of Cadiz, Agrifood Campus of International Excellence, Post Office Box 40, Pol. Río San Pedro, Puerto Real 11510, Cadiz, Spain.

In the present work, the accelerated ageing process of sherry vinegar has been studied at pilot scale by means of the joint application of ultrasound, micro-oxygenation and wood chips (American oak, French oak and Spanish oak). The CIELab parameters have been studied as well as the polyphenolic and volatile content of the aged vinegar samples. Vinegars aged with American oak presented different chromatic characteristics to those aged with French and Spanish oak and a lower polyphenolic and volatile content than the latter ones. Read More

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http://dx.doi.org/10.1016/j.ultsonch.2020.105244DOI Listing

Electron Transport Chain Complex II Regulates Steroid Metabolism.

iScience 2020 Jun 20;23(7):101295. Epub 2020 Jun 20.

Department of Chemistry, University of Alberta, Edmonton, Canada.

The first steroidogenic enzyme, cytochrome P450-side-chain-cleavage (SCC), requires electron transport chain (ETC) complexes III and IV to initiate steroid metabolic processes for mammalian survival. ETC complex II, containing succinate dehydrogenase (quinone), acts with the TCA cycle and has no proton pumping capacity. We show that complex II is required for SCC activation through the proton pump, generating an intermediate state for addition of phosphate by succinate. Read More

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http://dx.doi.org/10.1016/j.isci.2020.101295DOI Listing

Detection of Lipase Activity in Cells by a Fluorescent Probe Based on Formation of Self-Assembled Micelles.

iScience 2020 Jun 20;23(7):101294. Epub 2020 Jun 20.

Department of Pharmacology, Qingdao University School of Pharmacy, 308 Ningxia Road, Qingdao 266071, China; Institue of Innovative Drug Discovery, Qingdao University, 38 Dengzhou Road, Qingdao 266021, China. Electronic address:

Reliable and sensitive detection of lipase activity is essential for the early diagnosis and monitoring of acute pancreatitis or progression of digestive diseases. However, the available fluorescent probes for detection of lipase activity are only implemented in a hexane-water two-phase system due to the nature of heterogeneous catalysis of lipase, thus limiting their applications in direct imaging of lipase activity in living cells and tissues. Here we designed and synthesized a "turn on" fluorescent probe CPP based on self-assembled micelles for hydrolysis of lipase. Read More

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http://dx.doi.org/10.1016/j.isci.2020.101294DOI Listing

Interaction of RSC Chromatin Remodeling Complex with Nucleosomes Is Modulated by H3 K14 Acetylation and H2B SUMOylation In Vivo.

iScience 2020 Jun 20;23(7):101292. Epub 2020 Jun 20.

Department of Structural Biochemistry, Max-Planck-Institute of Molecular Physiology, Otto-Hahn-Strasse 11, 44227 Dortmund, Germany; Department of Chemical Engineering and Biotechnology, University of Applied Sciences Darmstadt, Stephanstrasse 7, 64295 Darmstadt, Germany. Electronic address:

Chromatin remodeling complexes are multi-subunit nucleosome translocases that reorganize chromatin in the context of DNA replication, repair, and transcription. To understand how these complexes find their target sites on chromatin, we use genetically encoded photo-cross-linker amino acids to map the footprint of Sth1, the catalytic subunit of the RSC complex, on nucleosomes in living yeast. We find that H3 K14 acetylation induces the interaction of the Sth1 bromodomain with the H3 tail and mediates the interaction of RSC with neighboring nucleosomes rather than recruiting it to chromatin. Read More

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http://dx.doi.org/10.1016/j.isci.2020.101292DOI Listing

Investigating the biomolecular interactions between model proteins and glycine betaine surfactant with reference to the stabilization of emulsions and antimicrobial properties.

Colloids Surf B Biointerfaces 2020 Jun 26;194:111226. Epub 2020 Jun 26.

Institute of Mechanical, Process & Energy Engineering, School of Engineering & Physical Sciences, Heriot-Watt University, EH14 4AS, Edinburgh, United Kingdom.

Binding effect and interaction of 2-pentadecanoyloxymethyl)trimethylammonium bromide (DMGM-14) with bovine serum albumin (BSA) and hen egg white lysozyme (HEWL) were systematically investigated by the fluorescence spectroscopy, circular dichroism (CD) spectroscopy, isothermal titration calorimetry (ITC), surface tension analysis, and molecular docking studies. The emulsion properties and particle size distribution of surfactant/protein complexes containing sunflower oil were studied using static light scattering and confocal laser scanning microscopy (CLSM). The fluorescence spectroscopy and ITC analysis confirmed the complexes formation of DMGM-14 with BSA and HEWL which was also verified by surface tension measurements. Read More

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http://dx.doi.org/10.1016/j.colsurfb.2020.111226DOI Listing

Mucoadhesive interactions between synthetic polyaspartamides and porcine gastric mucin on the colloid size scale.

Colloids Surf B Biointerfaces 2020 Jun 24;194:111219. Epub 2020 Jun 24.

Department of Physical Chemistry and Materials Science, Budapest University of Technology and Economics, Műegyetem rkp. 3, H-1111 Budapest, Hungary. Electronic address:

Synthetic polyaspartamides with various functional side groups including primary, secondary, tertiary amine or carboxyl groups were designed to explore the effect of chemical composition on polymer-mucin interactions. Since the molecular weight of the polymers and the degree of modification were identical for each derivative, the role of the functional groups could be evaluated. Chitosan was used as a control sample due to its strong interaction with mucin primarily through electrostatic forces. Read More

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http://dx.doi.org/10.1016/j.colsurfb.2020.111219DOI Listing

Drug affinity to human serum albumin prediction by retention of cetyltrimethylammonium bromide pseudostationary phase in micellar electrokinetic chromatography and chemically advanced template search descriptors.

J Pharm Biomed Anal 2020 Jun 19;188:113423. Epub 2020 Jun 19.

Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Medical University of Gdansk, 107 J. Hallera Avenue, 80-416 Gdansk, Poland.

The development of high-throughput methods for the estimation of physicochemical and biological properties of drug candidates is highly desired in the pharmaceutical landscape. Affinity to plasma protein is one of the most important biological properties, which should be taken under concern during the design and assessment of future potential medicines. The main goal of this study was to develop a quantitative retention-activity relationship model, with rationalized in vivo and in silico approach to predict the affinity to human serum albumin (HSA), which is one of the most important plasma proteins. Read More

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http://dx.doi.org/10.1016/j.jpba.2020.113423DOI Listing

Chiral differentiation of l- and d-penicillamine by β-cyclodextrin: Investigated by IRMPD spectroscopy and theoretical simulations.

Spectrochim Acta A Mol Biomol Spectrosc 2020 Jun 26;241:118653. Epub 2020 Jun 26.

State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China; Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, Tianjin 30007, China. Electronic address:

The chirality of penicillamine (Peni) results in different clinic applications. Host-guest complex based drug delivery system that differentiates the two enantiomers and provides delayed release is of significance in medication. We hereby used β-CD to encapsulate d- and l-Peni. Read More

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http://dx.doi.org/10.1016/j.saa.2020.118653DOI Listing

Developing a new chemosensor targeting zinc ion based on two types of quinoline platform.

Spectrochim Acta A Mol Biomol Spectrosc 2020 Jun 26;241:118652. Epub 2020 Jun 26.

Department of Fine Chemistry, SNUT (Seoul National Univ. of Sci. and Tech.), Seoul, 01811, Republic of Korea. Electronic address:

A chemosensor DQ (2-(2-(quinolin-2-yl)hydrazinyl)-N-(quinolin-8-yl)acetamide), based on two quinoline moieties, has been synthesized. DQ could detect zinc ion through fluorescence turn-on in aqueous media. Limit of detection was calculated as 0. Read More

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http://dx.doi.org/10.1016/j.saa.2020.118652DOI Listing

Multi-mode fluorescence sensing detection based on one core-shell structure quantum dots via different types of mechanisms.

Spectrochim Acta A Mol Biomol Spectrosc 2020 Jun 19;241:118630. Epub 2020 Jun 19.

Research Center for Analytical Science, State Key Laboratory of Medicinal Chemical Biology and Tianjin Key Laboratory of Biosensing and Molecular Recognition, College of Chemistry, Nankai University, Tianjin 300071, China.

Multi-target sensing completed with single chemosensor is cost-effective and pretty attractive for the analysis of multiple analytes in single sample. CdTe/CdS QDs show high fluorescence quantum yield as a probe for the sensing purpose, but only single target is often detected. Here we proposed that three kinds of different response mechanisms were realized using CdTe/CdS QDs with the simultaneous sensing of Fe, CrO, and IO as model. Read More

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http://dx.doi.org/10.1016/j.saa.2020.118630DOI Listing

Corrigendum to "UV-visible and fluorescence spectroscopic assessment of meso-tetrakis-(4-halophenyl) porphyrin; HTXPP (X = F, Cl, Br, I) in THF and THF-water system: Effect of pH and aggregation behaviour" [Spectrochim. Acta A: Mol. Biomol. Spectrosc. 240 (2020) 118570].

Spectrochim Acta A Mol Biomol Spectrosc 2020 Jul 2;241:118656. Epub 2020 Jul 2.

Department of Chemistry, National Institute of Technology Srinagar, Hazratbal, Srinagar 190006, J & K, India. Electronic address:

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http://dx.doi.org/10.1016/j.saa.2020.118656DOI Listing

Co-cultivation of Beta vulgaris limits the pre-harvest colonization of foodborne pathogen (Salmonella spp.) on tomato.

Int J Food Microbiol 2020 Jun 20;332:108768. Epub 2020 Jun 20.

Department of Microbiology and Cell Biology, Indian Institute of Science, Bangalore 560012, India. Electronic address:

Soil-borne Salmonella is associated with a large number of food-related disease outbreaks linked to pre-harvest contamination of plants (like tomato) in agricultural fields. Controlling the spread of Salmonella at field is very important in order to prevent various food-borne illnesses. One such approach involves the utilization of antimicrobial secondary metabolite of plant origin. Read More

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http://dx.doi.org/10.1016/j.ijfoodmicro.2020.108768DOI Listing

A new whole-cell biocatalyst for sulfur dioxide filtering and degradation.

Bioresour Technol 2020 Jun 30;314:123755. Epub 2020 Jun 30.

Department of Chemistry, College of Science, Shiraz University, Shiraz, Iran. Electronic address:

In this study, the interaction of the magnetotactic bacterium with sulfite compounds and their potential to degrade SO was investigated using cyclic voltammetry (CV), molecular emission cavity analysis (MECA) and ion-exchange chromatography (IEC). This biofilter was able to degrade SO up to 22281 mg m by disproportionation reaction and the formation of S and SO with ≥99% efficiency. Designed biofilter was able to restart the initial performance at least after seven cycles if it was used at 14-day intervals. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123755DOI Listing

Simultaneous determination of seven perfluoroalkyl carboxylic acids in water samples by 2,3,4,5,6-pentafluorobenzyl bromide derivatization and gas chromatography-mass spectrometry.

Environ Pollut 2020 Jun 21;266(Pt 3):115043. Epub 2020 Jun 21.

Hebei Key Laboratory of Applied Chemistry, College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao, 066004, PR China. Electronic address:

A new derivatization reagent, 2,3,4,5,6-pentafluorobenzyl bromide (PFBBr), was employed to determine seven perfluoroalkyl carboxylic acids (PFCAs) simultaneously in tap water with gas chromatography-mass spectrometry (GC-MS) technique in this study. Firstly, seven PFCAs were derivatized to their corresponding esters under alkaline condition. The derivatization conditions including the amount of PFBBr and KCO, derivatization temperature and time were optimized to increase the derivatization efficiency. Read More

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http://dx.doi.org/10.1016/j.envpol.2020.115043DOI Listing

Human exposure to particles at the air-water interface: Influence of water quality on indoor air quality from use of ultrasonic humidifiers.

Environ Int 2020 Jul 2;143:105902. Epub 2020 Jul 2.

Department of Civil & Environmental Engineering, Virginia Tech, Blacksburg, VA, USA. Electronic address:

Ultrasonic humidifiers provide indoor relief to symptoms caused by dry air and produce aerosols containing both water and minerals that are present in the water that fills the humidifier. This study investigated the spatial distributions, concentrations, and metal and mineral composition of aerosols emitted when an ultrasonic humidifier was filled with deionized water (DI), low mineral tap water (LL), high total dissolved solids (TDS)/high hardness water (HH), and high TDS/low hardness water (HL). Aerosol/particle sizes and counts were obtained at six horizontal distances in both the plume and near floor for each water quality. Read More

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http://dx.doi.org/10.1016/j.envint.2020.105902DOI Listing

Targeting fungal virulence factor by small molecules: Structure-based discovery of novel secreted aspartic protease 2 (SAP2) inhibitors.

Eur J Med Chem 2020 Jun 21;201:112515. Epub 2020 Jun 21.

School of Pharmacy, Ningxia Medical University, 1160 Shengli Street, Yinchuan, 750004, China; Department of Medicinal Chemistry, School of Pharmacy, Second Military Medical University, 325 Guohe Road, Shanghai, 200433, China. Electronic address:

Secreted aspartic protease 2 (SAP2), a kind of virulence factor, is an emerging new antifungal target. Using docking-based virtual screening and structure-based inhibitor design, a series of novel SAP2 inhibitors were successfully identified. Among them, indolone derivative 24a showed potent SAP2 inhibitory activity (IC = 0. Read More

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http://dx.doi.org/10.1016/j.ejmech.2020.112515DOI Listing

Synthesis and structure activity relationships of cyanopyridone based anti-tuberculosis agents.

Eur J Med Chem 2020 Jun 12;201:112450. Epub 2020 Jun 12.

Laboratory for Medicinal Chemistry (FFW), Ghent University, Ottergemsesteenweg 460, B9000, Gent, Belgium. Electronic address:

Mycobacterium tuberculosis, the causative agent of tuberculosis, relies on thymidylate kinase (MtbTMPK) for the synthesis of thymidine triphosphates and thus also DNA synthesis. Therefore, this enzyme constitutes a potential Achilles heel of the pathogen. Based on a previously reported MtbTMPK 6-aryl-substituted pyridone inhibitor and guided by two co-crystal structures of MtbTMPK with pyridone- and thymine-based inhibitors, we report the synthesis of a series of aryl-shifted cyanopyridone analogues. Read More

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http://dx.doi.org/10.1016/j.ejmech.2020.112450DOI Listing

Nanostructured-membrane electron phase plates.

Ultramicroscopy 2020 Jun 25;217:113053. Epub 2020 Jun 25.

Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139, United States.

Electron beams can acquire designed phase modulations by passing through nanostructured material phase plates. These phase modulations enable electron wavefront shaping and benefit electron microscopy, spectroscopy, lithography, and interferometry. However, in the fabrication of electron phase plates, the typically used focused-ion-beam-milling method limits the fabrication throughput and hence the active area of the phase plates. Read More

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http://dx.doi.org/10.1016/j.ultramic.2020.113053DOI Listing

Sorption and degradation of ranitidine in soil: Leaching potential assessment.

Chemosphere 2020 Jul 1;259:127495. Epub 2020 Jul 1.

Department of Chemistry, College of Science, Al-Nahrain University, Baghdad, Iraq.

Pharmaceuticals have been categorized as emerging contaminants that may be hazardous to the environment. To assess their environmental risk, understanding their fate and behaviour is highly needed, particularly in soil where little is known. This study investigated sorption, degradation and mobility potential of ranitidine (RAN) from soil to groundwater in two soils with different physicochemical properties. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127495DOI Listing

Copper nanowires as nanofertilizers for alfalfa plants: Understanding nano-bio systems interactions from microbial genomics, plant molecular responses and spectroscopic studies.

Sci Total Environ 2020 Jun 27;742:140572. Epub 2020 Jun 27.

Department of Chemistry and Biochemistry, The University of Texas at El Paso, 500 West University Avenue, El Paso, TX 79968, USA; Environmental Science and Engineering Ph.D. program, The University of Texas at El Paso, 500 West University Avenue, El Paso, TX 79968, USA; UC Center for Environmental Implications of Nanotechnology (UC CEIN), The University of Texas at El Paso, 500 West University Avenue, El Paso, TX 79968, USA. Electronic address:

The recent application of nano copper (Cu) compounds in the agrosystem has shown potential to improve the physiological performance and agronomical parameters of crops. We grew alfalfa (Medicago sativa) in potting mix amended with bulk, nano, and ionic Cu compounds at 80 and 280 mg Cu/kg; then, we evaluated plant performance at physiological and molecular levels. Plants treated with bulk/nano Cu presented better agronomical responses. Read More

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http://dx.doi.org/10.1016/j.scitotenv.2020.140572DOI Listing

Processing of dissolved organic matter from surface waters to sediment pore waters in a temperate coastal wetland.

Sci Total Environ 2020 Jun 24;742:140491. Epub 2020 Jun 24.

Organic Geochemistry Unit, Key Laboratory of Geoscience Big Data and Deep Resource of Zhejiang Province, School of Earth Sciences, Zhejiang University, Hangzhou 310027, China. Electronic address:

Coastal wetlands are active transitional ecotones between land and ocean, and are considered as hot spots of organic matter processing within the global carbon cycle, which dissolved organic matter (DOM) plays a critical role. In this study, combined use of ultrahigh-resolution mass spectrometry (FT-ICR MS) and complementary optical techniques was conducted to assess the detailed molecular composition of DOM in the temperate Liaohe coastal wetland (LCW), NE China in respect to the differences in DOM composition from surface water to sediment pore water. Significant positive correlations between salinity and dissolved organic carbon (DOC) concentrations were observed in both surface waters and pore waters. Read More

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http://dx.doi.org/10.1016/j.scitotenv.2020.140491DOI Listing

Exploring novel Cr(VI) remediation genes for Cr(VI)-contaminated industrial wastewater treatment by comparative metatranscriptomics and metagenomics.

Sci Total Environ 2020 Jun 25;742:140435. Epub 2020 Jun 25.

Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Tianshuinanlu #222, Lanzhou 730000, Gansu, China; Key Laboratory for Resources Utilization Technology of Unconventional Water of Gansu province, Gansu Academy of Membrane Science and Technology, Duanjiatanlu #1272, Lanzhou 730000, Gansu, China. Electronic address:

Microbial remediation is a promising method to treat Cr(VI) in industrial wastewater. The remediation efficiency and stress-resistance ability of Cr(VI) remediation genes in microbes are the limiting factors for their application in industrial wastewater treatment. To screen novel highly efficient Cr(VI) remediation genes, comparative metatranscriptomic and metagenomic analyses were performed on long-term Cr(VI)-contaminated riparian soil with/without additional Cr(VI) treatment. Read More

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http://dx.doi.org/10.1016/j.scitotenv.2020.140435DOI Listing

Investigating the roles of the conserved Cu-binding residues on Brucella FtrA in producing conformational stability and functionality.

J Inorg Biochem 2020 Jun 23;210:111162. Epub 2020 Jun 23.

Department of Chemistry, Amity Institute of Applied Sciences, Amity University Kolkata, WB, 700135, India.

Brucella is a zoonotic pathogen requiring iron for its survival and acquires this metal through the expression of several high-affinity uptake systems. Of these, the newly discovered ferrous iron transporter, FtrABCD, is proposed to take part in ferrous iron uptake. Sequence homology shows that, FtrA, the proposed periplasmic ferrous-binding component, is a P19-type protein (a periplasmic protein from C. Read More

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http://dx.doi.org/10.1016/j.jinorgbio.2020.111162DOI Listing

Effects of pre-harvest glyphosate use on protein composition and shikimic acid accumulation in spring wheat.

Food Chem 2020 Jun 27;332:127422. Epub 2020 Jun 27.

Department of Plant Sciences, North Dakota State University, Fargo, ND 58108-6050, USA. Electronic address:

During wheat cultivation, glyphosate-based herbicides are recommended to be applied a week prior to harvest during the ripe stage of physiological maturity. However, some grains may not be at this physiological stage due to non-uniform maturation within the field. The goal of this study was to determine the effect of glyphosate-based herbicide timing on the chemistry of wheat gluten proteins and shikimic acid accumulation. Read More

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http://dx.doi.org/10.1016/j.foodchem.2020.127422DOI Listing

Comparison of different types of sorbents for extraction of coumarins.

Food Chem 2020 Jun 27;332:127404. Epub 2020 Jun 27.

Slovak University of Technology in Bratislava, Faculty of Chemical and Food Technology, Institute of Analytical Chemistry, Radlinského 9, 812 37 Bratislava, Slovak Republic.

Coumarins, derivatives of cinnamic acid, are found in wines aged in wooden barrels. The lab-made molecularly imprinted polymers (MIP), selective for simple coumarins, were used in three forms, as sorbents in solid phase extraction (SPE) cartridge or pipette tip and coated on to the surface of magnetite for magnetic extraction. MIP-7-hydroxycoumarin had greater selectivity and extraction efficiency (recoveries above 75%, RSDs less than 6%) compared with conventional SPE sorbents (C18 and styrene-divinylbenzene polymeric types). Read More

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http://dx.doi.org/10.1016/j.foodchem.2020.127404DOI Listing

Analysis of total phenolic compounds in tea and fruits using diazotized aminobenzenes colorimetric spots.

Food Chem 2020 Jun 27;332:127392. Epub 2020 Jun 27.

Chemistry Department, Al-Quwayiyah College of Science and Humanities, 11971, Shaqra University, Saudi Arabia; Hot Laboratory Center, Nuclear Fuel Technology Department, Atomic Energy Authority, Cairo, Egypt. Electronic address:

The present work describes a novel and rapid approach for evaluating total phenolic compounds (TPCs) in tea and fruits using colorimetric spots and the digital image-based (DIB) method. Colorimetric spots were formed by reacting diazotized aminobenzenes namely sulfanilic acid, sulfanilamide, or aniline with TPCs in the extract to form an azo dye. The limit of detection (LOD) was 6. Read More

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http://dx.doi.org/10.1016/j.foodchem.2020.127392DOI Listing

Effect of supercritical CO plant extract and berry press cakes on stability and consumer acceptance of frozen Baltic herring (Clupea harengus membras) mince.

Food Chem 2020 Jun 27;332:127385. Epub 2020 Jun 27.

Food Chemistry and Food Development, Department of Biochemistry, University of Turku, 20014 Turku, Finland. Electronic address:

A promising way of processing Baltic herring, Clupea harengus membras, is turning the fish into boneless mince. However, Baltic herring is prone to lipid oxidation, which possesses a challenge for industrial applications. The aim of this work was to study the efficacy of press cakes from Finnish berries and a supercritical CO plant extract to limit lipid oxidation during frozen storage of Baltic herring mince and to determine the impact of these additions on consumer acceptance in a fish product. Read More

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http://dx.doi.org/10.1016/j.foodchem.2020.127385DOI Listing

Nanoplatelet interactions in the presence of multivalent ions: The effect of overcharging and stability.

J Colloid Interface Sci 2020 Jun 19;579:573-581. Epub 2020 Jun 19.

Theoretical Chemistry, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden; LINXS - Lund Institute of Advanced Neutron and X-ray Science, Scheelevägen 19, SE-223 70 Lund, Sweden. Electronic address:

Hypothesis: The stability of colloidal dispersions in the presence of multivalent ions depends strongly on the electrostatic interactions between the suspended particles. Of particular interest are colloidal particles having dimensions in the nanometric range and with an anisotropic shape due to its high surface area per unit mass, for example clay, which has the key characteristic of a negatively charged surface, surrounded by an oppositely charged rim.

Experiments: In this study, we investigate the interactions in nanoplatelet dispersions for the model system of Laponite® clay with addition of mono- and multivalent salt. Read More

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http://dx.doi.org/10.1016/j.jcis.2020.06.045DOI Listing

Improved permeability and antifouling properties of polyvinyl chloride ultrafiltration membrane via blending sulfonated polysulfone.

J Colloid Interface Sci 2020 Jun 27;579:562-572. Epub 2020 Jun 27.

School of Chemistry and Chemical Engineering, Xinxiang University, Xinxiang 453003, Henan, China; Department of Polymer Science and Engineering, ERC of Membrane and Water Treatment (MOE), Zhejiang University, Hangzhou 310027, Zhejiang, China.

To improve the permeability and antifouling properties of polyvinyl chloride (PVC) ultrafiltration (UF) membrane, amphiphilic sulfonated polysulfone (SPSF) was introduced into PVC matrix. Three types of PVC/SPSF blend membranes containing different SPSF with the sulfonation degree (SD) of 20%, 30%, and 50% were fabricated by non-solvent induced phase separation (NIPS) process. The excellent compatibility between PVC and SPSF was confirmed by differential scanning calorimetry (DSC). Read More

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http://dx.doi.org/10.1016/j.jcis.2020.06.097DOI Listing

Poloxamer/sodium cholate co-formulation for micellar encapsulation of doxorubicin with high efficiency for intracellular delivery: An in-vitro bioavailability study.

J Colloid Interface Sci 2020 Jun 25;579:551-561. Epub 2020 Jun 25.

Chemistry Department, University "La Sapienza", P.le Aldo Moro 5, 00185 Rome, Italy; Centre for Colloid and Surface Science - C.S.G.I, Operative Unit of Bari c/o Chemistry Department, University "Aldo Moro", Bari, Italy. Electronic address:

Hypothesis: Doxorubicin hydrochloride (DX) is widely used as a chemotherapeutic agent, though its severe side-effects limit its clinical use. A way to overcome these limitations is to increase DX latency through encapsulation in suitable carriers. However, DX has a high solubility in water, hindering encapsulation. Read More

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http://dx.doi.org/10.1016/j.jcis.2020.06.096DOI Listing

Preparation of low-load Au-Pd alloy decorated carbon fibers binder-free cathode for Li-O battery.

J Colloid Interface Sci 2020 Jun 27;579:448-454. Epub 2020 Jun 27.

School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang City, Henan Province 453007, PR China; National & Local Engineering Laboratory for Motive Power and Key Materials, Xinxiang 453000, PR China. Electronic address:

Developing high-performance cathode is critical to facilitating the development of lithium-oxygen (Li-O) batteries. In this work, a low-load (1.32%) Au-Pd alloy decorated carbon fibers binder-free cathode is prepared by facile magnetron sputtering (MS). Read More

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http://dx.doi.org/10.1016/j.jcis.2020.06.084DOI Listing

A bifunctional β-MnO mesh for expeditious and ambient degradation of dyes in activation of peroxymonosulfate (PMS) and simultaneous oil removal from water.

J Colloid Interface Sci 2020 Jun 26;579:412-424. Epub 2020 Jun 26.

Department of Chemistry, Tsinghua University, Beijing 100084, PR China. Electronic address:

Dual functional membranes that can simultaneously remove water-insoluble oil and degrade water-soluble dyes have received considerable attention. Nevertheless, there remain arduous challenges due to the critical restriction of slow degradation rate and the heavy dependence on external stimuli like light, electricity or heat. Herein, we report a superwetting and rapidly catalytic β-MnO mesh prepared by one-step hydrothermal method. Read More

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http://dx.doi.org/10.1016/j.jcis.2020.06.073DOI Listing

Developmental stages of Amphibiocystidium sp., a parasite from the Italian stream frog (Rana italica).

Zoology (Jena) 2020 Jun 2;141:125813. Epub 2020 Jun 2.

Department of Chemistry, Biology and Biotechnology, University of Perugia, Via Elce di Sotto 8, 06123 Perugia, Italy. Electronic address:

Amphibian parasites of the genus Amphibiocystidium are members of the class Ichthyosporea (=Mesomycetozoea), within the order Dermocystida. Most of the species in the Dermocystida fail to grow in ordinary culture media, so their life cycle has only been partially constructed by studies in host tissues. However, to date, there have been few reports on the life cycle of Amphibiocystidium parasites with respect to the developmental life stages of both Dermocystidium and Rhinosporidium parasites. Read More

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http://dx.doi.org/10.1016/j.zool.2020.125813DOI Listing
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