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https://www.readbyqxmd.com/read/28230973/unique-opto-electronic-structure-and-photo-reduction-properties-of-sulfur-doped-lead-chromates-explaining-their-instability-in-paintings
#1
Vanousheh Rahemi, Nasrin Sarmadian, Willemien Anaf, Koen Janssens, Dirk Lamoen, Bart Partoens, Karolien De Wael
Chrome yellow refers to a group of synthetic inorganic pigments that became popular as an artist's material from the second quarter of the 19th century. The color of the pigment, in which the chromate ion acts as a chromophore, is related to its chemical composition (PbCr1-xSxO4, with 0≤x≤0.8) and crystalline structure (monoclinic/orthorhombic). Their shades range from the yellow-orange to the paler yellow tones with increasing sulfate amount. These pigments show remarkable signs of degradation after limited time periods...
February 23, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28230794/structural-determinant-and-its-underlying-molecular-mechanism-of-stpc2-related-to-anti-angiogenic-activity
#2
Min Hu, Ning Cui, Zhixiang Bo, Feixiang Xiang
In this study, we aimed to use different strategies to further uncover the anti-angiogenic molecular mechanism of a fucoidan-like polysaccharide STPC2, isolated from brown alga Sargassum thunbergii. A desulfated derivative, STPC2-DeS, was successfully prepared and identified. The native polysaccharide and desulfated product were subjected to evaluate their anti-angiogenic effects. In the tube formation assay, STPC2 showed dose-dependent inhibition. In addition, STPC2 could distinctly inhibit the permeation of HUVEC cells into the lower chamber...
February 21, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28230785/the-application-of-a-modified-d-roms-test-for-measurement-of-oxidative-stress-and-oxidized-high-density-lipoprotein
#3
Fumiaki Ito, Tomoyuki Ito, Chinatsu Suzuki, Tomoyo Yahata, Kazuyuki Ikeda, Kenji Hamaoka
Reactive oxygen species (ROS) are involved in the initiation and progression of atherosclerosis. ROS-derived hydroperoxides, as an indicator of ROS production, have been measured by using the diacron reactive oxygen metabolites (d-ROMs) test, which requires iron-containing transferrin in the reaction mixture. In this study we developed a modified d-ROMs test, termed the Fe-ROMs test, where iron ions were exogenously added to the reaction mixture. This modification is expected to exclude the assay variation that comes from different blood iron levels in individuals...
February 21, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28230769/hypoallergenic-variant-of-the-major-egg-white-allergen-gal-d-1-produced-by-disruption-of-cysteine-bridges
#4
Pathum Dhanapala, Dulashi Withanage-Dona, Mimi L K Tang, Tim Doran, Cenk Suphioglu
Gal d 1 (ovomucoid) is the dominant allergen in the chicken egg white. Hypoallergenic variants of this allergen can be used in immunotherapy as an egg allergy treatment approach. We hypothesised that disruption of two of the nine cysteine-cysteine bridges by site-directed mutagenesis will allow the production of a hypoallergenic variant of the protein; Methods: Two cysteine residues at C192 and C210 in domain III of the protein were mutated to alanine using site-directed mutagenesis, to disrupt two separate cysteine-cysteine bridges...
February 21, 2017: Nutrients
https://www.readbyqxmd.com/read/28230380/effects-of-6-hydroxyceramides-on-the-thermotropic-phase-behavior-and-permeability-of-model-skin-lipid-membranes
#5
Andrej Kovacik, Michaela Silarova, Petra Pullmannová, Jaroslav Maixner, Katerina Vavrova
Ceramides (Cer) based on 6-hydroxysphingosine are important components of the human skin barrier, the stratum corneum. Although diminished concentrations of 6-hydroxyCer have been detected in skin diseases such as atopic dermatitis, our knowledge of these unusual sphingolipids, which have only been found in the skin, is limited. In this work, we investigate the biophysical behavior of N-lignoceroyl 6-hydroxysphingosine (Cer NH) in multilamellar lipid membranes composed of Cer/free fatty acids (C16-C24)/cholesterol/cholesteryl sulfate...
February 23, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28230319/depletion-of-abundant-human-serum-proteins-by-per-se-imprinted-cryogels-based-on-sample-heterogeneity
#6
Chun Yang, Ya-Ru Liu, Yan Zhang, Jian Wang, Li-Li Tian, Ya-Nan Yan, Wei-Qin Cao, Yu-Yang Wang
Macroporous cryogels were prepared and used to deplete abundant proteins. It was accomplished based on the sample heterogeneity rather than any exogenous assistance. Human serum was added in monomer solutions to synthesize molecularly imprinted polymers (MIPs); therein some abundant proteins were imprinted in the polyacrylamide cryogels. Meanwhile the rare components remained aqueous. Chromatography and electrophoresis showed that albumin, serotransferrin and most globulins were depleted by columns packed with the MIPs...
February 23, 2017: Proteomics
https://www.readbyqxmd.com/read/28230180/assessment-of-chicken-carcass-microbiome-responses-during-processing-in-the-presence-of-commercial-antimicrobials-using-a-next-generation-sequencing-approach
#7
Sun Ae Kim, Si Hong Park, Sang In Lee, Casey M Owens, Steven C Ricke
The purpose of this study was to 1) identify microbial compositional changes on chicken carcasses during processing, 2) determine the antimicrobial efficacy of peracetic acid (PAA) and Amplon (blend of sulfuric acid and sodium sulfate) at a poultry processing pilot plant scale, and 3) compare microbial communities between chicken carcass rinsates and recovered bacteria from media. Birds were collected from each processing step and rinsates were applied to estimate aerobic plate count (APC) and Campylobacter as well as Salmonella prevalence...
February 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28229453/chondrodysplasia-with-multiple-dislocations-comprehensive-study-of-a-series-of-30-cases
#8
E Ranza, C Huber, N Levin, G Baujat, C Bole-Feysot, P Nitschke, C Masson, Y Alanay, L Al-Gazali, P Bitoun, O Boute, P Campeau, C Coubes, M McEntagart, N Elcioglu, L Faivre, A Gezdirici, D Johnson, E Mihci, B G Nur, L Perrin, C Quelin, P Terhal, B Tuysuz, V Cormier-Daire
The group of chondrodysplasia with multiple dislocations includes several entities, characterized by short stature, dislocation of large joints, hand and/or vertebral anomalies. Other features, such as epiphyseal or metaphyseal changes, cleft palate, intellectual disability are also often part of the phenotype. In addition, several conditions with overlapping features are related to this group and broaden the spectrum. The majority of these disorders have been linked to pathogenic variants in genes encoding proteins implicated in the synthesis or sulfation of proteoglycans (PG)...
October 13, 2016: Clinical Genetics
https://www.readbyqxmd.com/read/28229260/dehydroepiandrosterone-sulfate-dhea-s-sex-and-age-in-zoo-housed-western-lowland-gorillas-gorilla-gorilla-gorilla
#9
Ashley N Edes
Among humans, dehydroepiandrosterone-sulfate (DHEA-S) declines with age and is hypothesized to be involved in somatic maintenance and healthy aging. Men have significantly higher DHEA-S than women, contradicting longer lifespans in the latter. Declines of DHEA-S with age also are observed in chimpanzees. In both chimpanzees and bonobos, males and females show no differences in DHEA-S production. Based on human and chimpanzee data, gorillas were predicted to show declining DHEA-S with age. Similar to chimpanzees and bonobos, it also was predicted DHEA-S would not be significantly different between males and females...
February 22, 2017: Primates; Journal of Primatology
https://www.readbyqxmd.com/read/28229155/sulfate-radical-oxidation-of-aromatic-contaminants-a-detailed-assessment-of-density-functional-theory-and-high-level-quantum-chemical-methods
#10
Sangavi Pari, Inger A Wang, Haizhou Liu, Bryan M Wong
Advanced oxidation processes that utilize highly oxidative radicals are widely used in water reuse treatment. In recent years, the application of sulfate radical (SO4˙(-)) as a promising oxidant for water treatment has gained increasing attention. To understand the efficiency of SO4˙(-) in the degradation of organic contaminants in wastewater effluent, it is important to be able to predict the reaction kinetics of various SO4˙(-)-driven oxidation reactions. In this study, we utilize density functional theory (DFT) and high-level wavefunction-based methods (including computationally-intensive coupled cluster methods), to explore the activation energies of SO4˙(-)-driven oxidation reactions on a series of benzene-derived contaminants...
February 23, 2017: Environmental Science. Processes & Impacts
https://www.readbyqxmd.com/read/28228375/is-it-time-to-reinvent-basic-cell-culture-medium
#11
Turney J McKee, Svetlana V Komarova
The success of in vitro experiments depends largely on the quality of the cell culture media. Four synthetic media formulations, Dulbecco's Modified Minimum Essential Media (DMEM), RPMI 1640, Minimum Essential Media and its alpha modification (MEM), and Medium 199 (M199) are used in ~90% of published in vitro studies. We compared the levels of electrolytes and carbohydrates in these media formulations to physiological values in plasma and cerebrospinal fluid. The most commonly used media, DMEM and RPMI 1640, largely deviate from physiological levels of glucose...
February 22, 2017: American Journal of Physiology. Cell Physiology
https://www.readbyqxmd.com/read/28228318/endocrine-and-cardiometabolic-cord-blood-characteristics-of-offspring-born-to-mothers-with-and-without-polycystic-ovary-syndrome
#12
Nadine M P Daan, Maria P H Koster, Regine P Steegers-Theunissen, Marinus J C Eijkemans, B C J M Fauser
OBJECTIVE: To compare the endocrine and cardiometabolic cord blood characteristics of offspring of mothers with polycystic ovary syndrome (PCOS) with those of healthy controls. DESIGN: Cross-sectional case control study. SETTING: University medical centers. PATIENT(S): Offspring from mothers with PCOS (n = 61) and healthy controls (n = 82). INTERVENTION(S): Cord blood withdrawal from neonates. MAIN OUTCOME MEASURE(S): Cord blood estradiol, androstenedione, dehydroepiandrosterone sulfate (DHEAS), testosterone, sex hormone-binding globulin, free androgen index (FAI), insulin, total cholesterol, low-density lipoprotein cholesterol, high-density lipoprotein cholesterol, triglycerides, c-reactive protein, adiponectin, and leptin...
January 2017: Fertility and Sterility
https://www.readbyqxmd.com/read/28226267/a-simple-lc-ms-ms-method-for-the-simultaneous-quantification-of-resveratrol-and-its-major-phase-ii-metabolites-assessment-of-their-urinary-and-biliary-excretions-in-rats
#13
Zhixia Qiu, Jiaojiao Yu, Yu Dai, Xijing Chen, Fang Huang, Ning Li
Trans-resveratrol (Res) is rapidly metabolized, extensively distributed into various tissues and mainly excreted by urine. The present study aimed to establish a simple LC-MS/MS method to simultaneously quantify Res and its major phase II metabolites (Res-3-O-β-d-glucuronide, R3G; Res-4'-O-β-d-glucuronide, R4'G; Res-resveratrol 3-sulfate, R3S; and Res-4'-sulfate, R4'S), and apply this method to assess their urinary and biliary excretions in rats. A simplified salting-out assisted liquid-liquid extraction (SALLE) strategy was developed to prepare samples with acetonitrile-methanol mixture (8:2, v/v) as extractant and ammonium acetate solution (10M) as salting-out reagent...
February 14, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28226251/effects-of-sulfate-on-heavy-metal-release-from-iron-corrosion-scales-in-drinking-water-distribution-system
#14
Huifang Sun, Baoyou Shi, Fan Yang, Dongsheng Wang
Trace heavy metals accumulated in iron corrosion scales within a drinking water distribution system (DWDS) could potentially be released to bulk water and consequently deteriorate the tap water quality. The objective of this study was to identify and evaluate the release of trace heavy metals in DWDS under changing source water conditions. Experimental pipe loops with different iron corrosion scales were set up to simulate the actual DWDS. The effects of sulfate levels on heavy metal release were systemically investigated...
February 13, 2017: Water Research
https://www.readbyqxmd.com/read/28226217/sulfation-of-glycosaminoglycans-and-its-implications-in-human-health-and-disorders
#15
Diana Soares da Costa, Rui L Reis, Iva Pashkuleva
Sulfation is a dynamic and complex posttranslational modification process. It can occur at various positions within the glycosaminoglycan (GAG) backbone and modulates extracellular signals such as cell-cell and cell-matrix interactions; different sulfation patterns have been identified for the same organs and cells during their development. Because of their high specificity in relation to function,GAGsulfation patterns are referred to as the sulfation code. This review explores the role of GAG sulfation in different biological processes at the cell, tissue, and organism levels...
February 2, 2017: Annual Review of Biomedical Engineering
https://www.readbyqxmd.com/read/28225606/effect-of-astringent-stimuli-on-salivary-protein-interactions-elucidated-by-complementary-proteomics-approaches
#16
Judith Delius, Guillaume Médard, Bernhard Kuster, Thomas Hofmann
The interaction of astringent substances with salivary proteins, which results in protein precipitation, is considered a key event in the molecular mechanism underlying the oral sensation of puckering astringency. As the chemical nature of orally active astringents is diverse and the knowledge on their interactions with salivary proteins rather fragmentary, human whole saliva samples were incubated with supra-threshold and iso-intensity solutions of the astringent polyphenol (-)-epigallocatechin gallate, the multivalent metal salt iron(III) sulfate, the amino-functionalized polysaccharide chitosan, and the basic protein lysozyme...
February 22, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28225600/kinetics-and-mechanism-of-ultrasonic-activation-of-persulfate-an-in-situ-epr-spin-trapping-study
#17
Zongsu Wei, Frederick A Villamena, Linda K Weavers
Ultrasound (US) was shown to activate persulfate (PS) providing an alternative activation method to base or heat as an in-situ chemical oxidation (ISCO) method. The kinetics and mechanism of ultrasonic activation of PS were examined in aqueous solution using an in-situ electron paramagnetic resonance (EPR) spin trapping technique and radical trapping with probe compounds. Using the spin trap, 5,5-dimethyl-1-pyrroline-N-oxide (DMPO), hydroxyl radical (•OH) and sulfate radical anion (SO4•‒) were measured from ultrasonic activation of persulfate (US-PS)...
February 22, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28225285/multi-scale-modeling-of-the-effects-of-salt-and-perfume-raw-materials-on-the-rheological-properties-of-commercial-thread-like-micellar-solutions
#18
Xueming Tang, Weizhong Zou, Peter H Koenig, Shawn D McConaughy, Michael R Weaver, David Michael Eike, Michael J Schmidt, Ronald G Larson
We link micellar structures to rheological properties for two surfactant body-wash formulations at various concentrations of salts and perfume raw materials (PRMs) using molecular simulations and micellar-scale modeling as well as traditional surfactant packing arguments. The two body washes, named BW-1EO and BW-3EO, are composed of sodium lauryl ethylene glycol ether sulfate (SLEnS, where n is the average number of ethylene glycol repeat units), cocamidopropyl betaine (CAPB), ACCORD (which is a mixture of six PRMs), and NaCl salt...
February 22, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28225210/prophylactic-drug-management-for-febrile-seizures-in-children
#19
REVIEW
Martin Offringa, Richard Newton, Martinus A Cozijnsen, Sarah J Nevitt
BACKGROUND: Febrile seizures occurring in a child older than one month during an episode of fever affect 2% to 4% of children in Great Britain and the United States and recur in 30%. Rapid-acting antiepileptics and antipyretics given during subsequent fever episodes have been used to avoid the adverse effects of continuous antiepileptic drugs. OBJECTIVES: To evaluate primarily the effectiveness and safety of antiepileptic and antipyretic drugs used prophylactically to treat children with febrile seizures; but also to evaluate any other drug intervention where there was a sound biological rationale for its use...
February 22, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28224895/conductive-microbial-cellulose-as-a-novel-biocathode-for-cr-vi-bioreduction
#20
Mahshid Loloei, Abbas Rezaee, Alireza Sabour Roohaghdam, Mahmood Aliofkhazraei
In the present study, microbial cellulose (MC) as a carbohydrate polymer was made conductive by oxidative polymerization with aniline. Sulfate-reducing bacteria (SRB) were immobilized on the surface of the conductive biopolymer, and this was used as a biocathode in a bioreduction process to reduce Cr (VI) as a model of heavy metals. The results of Fourier transform infrared analysis confirmed that the polyaniline was distributed on the cellulose surface. The maximum tensile stress of the conductive biopolymer was obtained 23MPa using calculating Young's modulus...
April 15, 2017: Carbohydrate Polymers
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