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https://www.readbyqxmd.com/read/29454260/solar-photo-fenton-treatment-of-microcystin-lr-in-aqueous-environment-transformation-products-and-toxicity-in-different-water-matrices
#1
Akin Karci, Elizabeth M Wurtzler, Armah A de la Cruz, David Wendell, Dionysios D Dionysiou
Transformation products and toxicity patterns of microcystin-LR (MC-LR), a common cyanotoxin in freshwaters, during degradation by solar photo-Fenton process were studied in the absence and presence of two major water components, namely fulvic acid and alkalinity. The transformation products m/z 795, 835, 515/1030 and 532 can be formed through attack of OH on the conjugated carbon double bonds of Adda. Transformation products with m/z 1010, 966 and 513 can be generated through the attack of OH on the methoxy group of Adda...
January 2, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29454210/sunshine-duration-reconstruction-in-the-southeastern-tibetan-plateau-based-on-tree-ring-width-and-its-relationship-to-volcanic-eruptions
#2
Changfeng Sun, Yu Liu, Huiming Song, Qiufang Cai, Qiang Li, Lu Wang, Ruochen Mei, Congxi Fang
Sunshine is as essential as temperature and precipitation for tree growth, but sunshine duration reconstructions based on tree rings have not yet been conducted in China. In this study, we presented a 497-year sunshine duration reconstruction for the southeastern Tibetan Plateau using a width chronology of Abies forrestii from the central Hengduan Mountains. The reconstruction accounted for 53.5% of the variance in the observed sunshine during the period of 1961-2013 based on a stable and reliable linear regression...
February 14, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29454091/anlotinib-inhibits-angiogenesis-via-suppressing-the-activation-of-vegfr2-pdgfr%C3%AE-and-fgfr1
#3
Binyan Lin, Xiuming Song, Dawei Yang, Dongsheng Bai, Yuyuan Yao, Na Lu
Tumor cells recruit vascular endothelial cells and circulating endothelial progenitor cells to form new vessels to support their own growth and metastasis. VEGF, PDGF-BB and FGF-2 are three major pro-angiogenic factors and applied to promote angiogenesis. In this research, we demonstrated that anlotinib, a potent multi-tyrosine kinases inhibitor (TKI), showed a significant inhibitory effect on VEGF/PDGF-BB/FGF-2-induced angiogenesis in vitro and in vivo. Wound healing assay, chamber directional migration assay and tube formation assay indicated that anlotinib inhibited VEGF/PDGF-BB/FGF-2-induced cell migration and formation of capillary-like tubes in endothelial cells...
February 14, 2018: Gene
https://www.readbyqxmd.com/read/29453617/site-suitability-evaluation-of-an-old-operating-landfill-using-ahp-and-gis-techniques-and-integrated-hydrogeological-and-geophysical-surveys
#4
Masoud Saatsaz, Iman Monsef, Mostafa Rahmani, Abdolreza Ghods
Because of the outdated methods of common landfill selection, it is imperative to reevaluate the usage suitability. To assess the suitability of the existing waste landfill in Zanjan, Iran, we have used a combination of the analytical hierarchy process (AHP) and GIS techniques, along with fieldwork surveys. Four major criteria and 12 subcriteria were considered, and the AHP was applied to assign the relative importance weights of criteria and subcriteria to each other. Finally, a landfill suitability map was generated and ranked based on the final suitability scores...
February 16, 2018: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29453474/fingerprints-as-an-alternative-method-to-determine-abo-and-rh-blood-groups
#5
Sonam Chaudhary, Sajana Deuja, Munna Alam, Poonam Karmacharya, Monami Mondal
INTRODUCTION: Blood grouping is conventionally done with invasive method by taking blood samples. The objective of this study is to determine blood group with uninvasive procedure by taking fingerprints of the participants and know the associations between their fingerprints and blood groups. METHODS: Seven hundred participants of both genders with no any age limitation from Manipal Teaching Hospital and Manipal College of Medical Sciences were randomly selected...
October 2017: JNMA; Journal of the Nepal Medical Association
https://www.readbyqxmd.com/read/29453453/a-meta-surface-antenna-array-decoupling-maad-method-for-mutual-coupling-reduction-in-a-mimo-antenna-system
#6
Ziyang Wang, Luyu Zhao, Yuanming Cai, Shufeng Zheng, Yingzeng Yin
In this paper, a method to reduce the inevitable mutual coupling between antennas in an extremely closely spaced two-element MIMO antenna array is proposed. A suspended meta-surface composed periodic square split ring resonators (SRRs) is placed above the antenna array for decoupling. The meta-surface is equivalent to a negative permeability medium, along which wave propagation is rejected. By properly designing the rejection frequency band of the SRR unit, the mutual coupling between the antenna elements in the MIMO antenna system can be significantly reduced...
February 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29453355/co-expression-network-analysis-and-cis-regulatory-element-enrichment-determine-putative-functions-and-regulatory-mechanisms-of-grapevine-atl-e3-ubiquitin-ligases
#7
Darren C J Wong, Pietro Ariani, Simone Castellarin, Annalisa Polverari, Elodie Vandelle
Arabidopsis thaliana Toxicos en Levadura (ATL) proteins are a subclass of the RING-H2 zinc finger binding E3 ubiquitin ligases. The grapevine (Vitis vinifera) ATL family was recently characterized, revealing 96 members that are likely to be involved in several physiological processes through protein ubiquitination. However, the final targets and biological functions of most ATL E3 ligases are still unknown. We analyzed the co-expression networks among grapevine ATL genes across a set of transcriptomic data related to defense and abiotic stress, combined with a condition-independent dataset...
February 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29453347/reversing-coffee-ring-effect-by-laser-induced-differential-evaporation
#8
Tony M Yen, Xin Fu, Tao Wei, Roshan U Nayak, Yuesong Shi, Yu-Hwa Lo
The coffee-ring effect, ubiquitously present in the drying process of aqueous droplets, impedes the performance of a myriad of applications involving precipitation of particle suspensions in evaporating liquids on solid surfaces, such as liquid biopsy combinational analysis, microarray fabrication, and ink-jet printing, to name a few. We invented the methodology of laser-induced differential evaporation to remove the coffee-ring effect. Without any additives to the liquid or any morphology modifications of the solid surface the liquid rests on, we have eliminated the coffee-ring effect by engineering the liquid evaporation profile with a CO 2 laser irradiating the apex of the droplets...
February 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29453250/retinal-chitosan-conjugates-effectively-deliver-active-chromophores-to-retinal-photoreceptor-cells-in-blind-mice-and-dogs
#9
Songqi Gao, Shirin Kahremany, Jianye Zhang, Beata Jastrzebska, Janice Querubin, Simon M Petersen-Jones, Krzysztof Palczewski
The retinoid (visual) cycle consists of a series of biochemical reactions needed to regenerate the visual chromophore, 11-cis-retinal and sustain vision. Genetic or environmental factors affecting chromophore production can lead to blindness. Using animal models that mimic human retinal diseases, we previously demonstrated that mechanism-based pharmacological interventions can maintain vision in otherwise incurable genetic diseases of the retina. Here, we report that after 9-cis-retinal administration to lecithin:retinol acyltransferase-deficient (Lrat-/-) mice, the drug was rapidly absorbed and then cleared within 1-2 h...
February 16, 2018: Molecular Pharmacology
https://www.readbyqxmd.com/read/29453175/solubilization-of-polycyclic-aromatic-hydrocarbons-pahs-with-phenol-in-coking-wastewater-treatment-system-interaction-and-engineering-significance
#10
Qiaoping Kong, Haizhen Wu, Lei Liu, Fengzhen Zhang, Sergei Preis, Shuang Zhu, Chaohai Wei
Polycyclic aromatic hydrocarbons (PAHs) are accumulated in the sludge collected from the coking wastewater treatment. Phenol with its efficient degradation observed in biological treatment promotes the solubility of PAHs in aqueous phase. The interaction mechanism of phenol and PAHs in aqueous and sludge phases was systematically studied in two full-scale engineering projects composed of anaerobic-oxic-oxic (A-O 1 -O 2 ) and anaerobic-oxic-hydrolytic-oxic (A-O 1 -H-O 2 ) sequences. The results showed that reasonable use of phenol facilitates solubilization of PAHs alleviating their emission problems...
February 13, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29453094/a-multidisciplinary-study-of-3-%C3%AE-d-glucopyranosyl-5-substituted-1-2-4-triazole-derivatives-as-glycogen-phosphorylase-inhibitors-computation-synthesis-crystallography-and-kinetics-reveal-new-potent-inhibitors
#11
Sándor Kun, Jaida Begum, Efthimios Kyriakis, Evgenia C V Stamati, Thomas A Barkas, Eszter Szennyes, Éva Bokor, Katalin E Szabó, George A Stravodimos, Ádám Sipos, Tibor Docsa, Pál Gergely, Colin Moffatt, Myrto S Patraskaki, Maria C Kokolaki, Alkistis Gkerdi, Vassiliki T Skamnaki, Demetres D Leonidas, László Somsák, Joseph M Hayes
3-(β-d-Glucopyranosyl)-5-substituted-1,2,4-triazoles have been revealed as an effective scaffold for the development of potent glycogen phosphorylase (GP) inhibitors but with the potency very sensitive to the nature of the alkyl/aryl 5-substituent (Kun et al., Eur. J. Med. Chem. 2014, 76, 567). For a training set of these ligands, quantum mechanics-polarized ligand docking (QM-PLD) demonstrated good potential to identify larger differences in potencies (predictive index PI = 0.82) and potent inhibitors with K i 's < 10 μM (AU-ROC = 0...
February 2, 2018: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29452922/structural-biology-of-the-separase-securin-complex-with-crucial-roles-in-chromosome-segregation
#12
REVIEW
Shukun Luo, Liang Tong
The cysteine protease separase opens the cohesin ring by cleaving its kleisin subunit and is a pivotal cell cycle factor for the transition from metaphase to anaphase. It is inhibited by forming a complex with the chaperone securin, and in vertebrates, also by the Cdk1-cyclin B1 complex. Separase is activated upon the destruction of securin or cyclin B1 by the proteasome, after ubiquitination by the anaphase-promoting complex/cyclosome (APC/C). Here we review recent structures of the active protease segment of Chaetomium thermophilum separase in complex with a substrate-mimic inhibitor and full-length Saccharomyces cerevisiae and Caenorhabditis elegans separase in complex with securin...
February 13, 2018: Current Opinion in Structural Biology
https://www.readbyqxmd.com/read/29452767/uptake-and-distribution-of-organo-iodine-in-deep-sea-corals
#13
Nancy G Prouty, E Brendan Roark, Leslye M Mohon, Ching-Chih Chang
Understanding iodine concentration, transport, and bioavailability is essential in evaluating iodine's impact to the environment and its effectiveness as an environmental biogeotracer. While iodine and its radionuclides have proven to be important tracers in geologic and biologic studies, little is known about transport of this element to the deep sea and subsequent uptake in deep-sea coral habitats. Results presented here on deep-sea black coral iodine speciation and iodine isotope variability provides key information on iodine behavior in natural and anthropogenic environments, and its geochemical pathway in the Gulf of Mexico...
February 13, 2018: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/29452713/physiochemical-characteristics-of-aerosol-particles-collected-from-the-jokhang-temple-indoors-and-the-implication-to-human-exposure
#14
Lulu Cui, Bu Duo, Fei Zhang, Chunlin Li, Hongbo Fu, Jianmin Chen
This paper presents a detailed study on the indoor air pollution in the Jokahng Temple at Tibet Plateau, and its implication to human health. The mean concentrations of PM 1.0 and PM 2.5 were 435.0 ± 309.5 and 483.0 ± 284.9 μg/m 3 , respectively. The PM 2.5 concentration exceeded the National Ambient Air Quality Standard (75 μg/m 3 ) by 6.4 times. The size-segregated aerosols displayed a bimodal distribution. One peak was observed in the fine mode (0.4-2.1 μm) and the other peak appeared in the coarse mode (2...
February 13, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29452641/cdc48-vcp-promotes-chromosome-morphogenesis-by-releasing-condensin-from-self-entrapment-in-chromatin
#15
Yogitha Thattikota, Sylvain Tollis, Roger Palou, Justine Vinet, Mike Tyers, Damien D'Amours
The morphological transformation of amorphous chromatin into distinct chromosomes is a hallmark of mitosis. To achieve this, chromatin must be compacted and remodeled by a ring-shaped enzyme complex known as condensin. However, the mechanistic basis underpinning condensin's role in chromosome remodeling has remained elusive. Here we show that condensin has a strong tendency to trap itself in its own reaction product during chromatin compaction and yet is capable of interacting with chromatin in a highly dynamic manner in vivo...
February 15, 2018: Molecular Cell
https://www.readbyqxmd.com/read/29452248/mercaptopyruvate-acts-as-endogenous-vasodilator-independently-of-3-mercaptopyruvate-sulfurtransferase-activity
#16
Emma Mitidieri, Teresa Tramontano, Danila Gurgone, Valentina Citi, Vincenzo Calderone, Vincenzo Brancaleone, Antonia Katsouda, Noriyuki Nagahara, Andreas Papapetropoulos, Giuseppe Cirino, Roberta d'Emmanuele di Villa Bianca, Raffaella Sorrentino
Hydrogen sulfide (H 2 S) is produced by the action of cystathionine-β-synthase (CBS), cystathionine-γ-lyase (CSE) or 3-mercaptopyruvate sulfurtransferase (3-MST). 3-MST converts 3-mercaptopyruvate (MPT) to H 2 S and pyruvate. H 2 S is recognized as an endogenous gaseous mediator with multiple regulatory roles in mammalian cells and organisms. In the present study we demonstrate that MPT, the endogenous substrate of 3-MST, acts also as endogenous H 2 S donor. Colorimetric, amperometric and fluorescence based assays demonstrated that MPT releases H 2 S in vitro in an enzyme-independent manner...
February 13, 2018: Nitric Oxide: Biology and Chemistry
https://www.readbyqxmd.com/read/29452159/cyp27a1-acts-on-the-pre-vitamin-d3-photoproduct-lumisterol-producing-biologically-active-hydroxy-metabolites
#17
Robert C Tuckey, Wei Li, Dejian Ma, Chloe Y S Cheng, Katie M Wang, Tae-Kang Kim, Saowanee Jeayeng, Andrzej T Slominski
Prolonged exposure of the skin to UV radiation causes previtamin D3, the initial photoproduct formed by opening of the B ring of 7-dehydrocholesterol, to undergo a second photochemical reaction where the B-ring is reformed giving lumisterol3 (L3), a stereoisomer of 7-dehydrocholesterol. L3 was believed to be an inactive photoproduct of excessive UV radiation whose formation prevents excessive vitamin D production. Recently, we reported that L3 is present in serum and that CYP11A1 can act on L3 producing monohydroxy- and dihydroxy-metabolites which inhibit skin cell proliferation similarly to 1α,25-dihydroxyvitamin D3...
February 13, 2018: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/29451995/sex-dependent-choroidal-thickness-differences-in-healthy-adults-a-study-based-on-original-and-synthesized-data
#18
Wei Wang, Miao He, Xingwu Zhong
PURPOSE: The purpose of this study is to determine the influence of sex on choroidal thickness (CT) in healthy adults. METHODS: Healthy Chinese adults were recruited and complete ophthalmic examinations were performed. The choroid was imaged by swept-source optical coherence tomography and the macular CT in Early Treatment Diabetic Retinopathy Study grids was obtained by the intrinsic automated segmentation software. CT in males and females was compared after controlling other factors...
February 16, 2018: Current Eye Research
https://www.readbyqxmd.com/read/29451928/a-novel-connective-tissue-graft-harvesting-technique-the-ring-method
#19
Nejat Nizam, Aliye Akcalı
The aim of these case reports was to introduce a simplified novel connective tissue graft (CTG) harvesting technique, the ring method, which could be used in the maxillary tuberosity area in particular. A special CTG harvesting punch was fabricated to obtain a ring-shaped CTG that had a uniform thickness. The ring graft was then used for peri-implant soft tissue augmentation with successful clinical outcomes. The ring method is a technically insensitive and minimally invasive surgical procedure that provides a certain amount of CTG for various periodontal plastic surgical interventions...
February 16, 2018: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/29451821/protection-from-vascular-dysfunction-in-female-rats-with-chronic-stress-and-depressive-symptoms
#20
Steven D Brooks, Stan Hileman, Paul D Chantler, Samantha Milde, Kent C Lemaster, Stephanie Frisbee, J Kevin Shoemaker, Dwayne N Jackson, Jefferson C Frisbee
The increasing prevalence and severity of clinical depression is strongly correlated with vascular disease risk, creating a comorbid condition with poor outcomes, although demonstrating a sexual disparity where females are at lower risk than males for subsequent cardiovascular events. To determine potential mechanisms responsible for this protection against stress/depression-induced vasculopathy in females, we exposed male and female ({plus minus}ovariectomy) rats to the unpredictable chronic mild stress (UCMS) model for 8 weeks and determined depressive symptom severity, vascular reactivity in aortic rings (AR) and ex vivo middle cerebral arteries (MCA), and determined the profile of major metabolites regulating vascular tone...
February 16, 2018: American Journal of Physiology. Heart and Circulatory Physiology
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