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https://www.readbyqxmd.com/read/28324653/evaluation-of-brain-pharmacokinetic-and-neuropharmacodynamic-attributes-of-antiepileptic-drug-lacosamide-in-hepatic-and-renal-impairment-preclinical-evidence
#1
Baldeep Kumar, Manish Modi, Biman Saikia, Bikash Medhi
The knowledge of pharmacokinetic and pharmacodynamic properties of antiepileptic drugs is helpful in optimizing drug therapy for epilepsy. This study was designed to evaluate the pharmacokinetic and pharmacodynamic properties of lacosamide in experimentally induced hepatic and renal impairment in seizure animals. Hepatic or renal impairment was induced by injection of carbon tetrachloride or diclofenac sodium, respectively. After induction, the animals were administered with a single dose of lacosamide. At different time points, MES seizure recordings were done followed by isolation of plasma and brain samples for drug quantification and pharmacodynamic measurements...
March 21, 2017: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/28318103/a-phase-separation-route-to-synthesize-porous-cnts-with-excellent-stability-for-na-storage
#2
Zhi Chen, Taihong Wang, Ming Zhang, Guozhong Cao
Porous carbon nanotubes (CNTs) are obtained by removing MoO2 nanoparticles from MoO2 @C core@shell nanofibers which are synthesized by phase-segregation via a single-needle electrospinning method. The specific surface area of porous CNTs is 502.9 m(2) g(-1) , and many oxygen-containing functional groups (COH, CO) are present. As anodes for sodium-ion batteries, the porous CNT electrode displays excellent rate performance and cycling stability (110 mA h g(-1) after 1200 cycles at 5 A g(-1) ). Those high properties can be attributed to the porous structure and surface modification to steadily store Na(+) with high capacity...
March 20, 2017: Small
https://www.readbyqxmd.com/read/28316900/influence-of-environmental-factors-on-biodegradation-of-quinalphos-by-bacillus-thuringiensis
#3
Venkata Subba Reddy Gangireddygari, Praveen Kumar Kalva, Khayalethu Ntushelo, Manjunatha Bangeppagari, Arnaud Djami Tchatchou, Rajasekhar Reddy Bontha
BACKGROUND: The extensive and intensive uses of organophosphorus insecticide-quinalphos in agriculture, pose a health hazard to animals, humans, and environment because of its persistence in the soil and crops. However, there is no much information available on the biodegradation of quinalphos by the soil micro-organisms, which play a significant role in detoxifying pesticides in the environment; so research is initiated in biodegradation of quinalphos. RESULTS: A soil bacterium strain, capable of utilizing quinalphos as its sole source of carbon and energy, was isolated from soil via the enrichment method on minimal salts medium (MSM)...
2017: Environmental Sciences Europe
https://www.readbyqxmd.com/read/28314628/petit-high-pressure-carbon-dioxide-stress-increases-synthesis-of-s-adenosylmethionine-and-phosphatidylcholine-in-yeast-saccharomyces-cerevisiae
#4
Liyuan Niu, Kazuki Nomura, Hitoshi Iwahashi, Hiroyuki Matsuoka, Satoshi Kawachi, Yoshihisa Suzuki, Katsuhiro Tamura
Petit-High Pressure Carbon Dioxide (p-HPCD) is a promising nonthermal technology for foods pasteurization. Cluster analysis of gene expression profiles of Saccharomyces cerevisiae exposed to various stresses exhibited that gene expression profile for p-HPCD stress (0.5MPa, 25°C) was grouped into a cluster including profiles for Sodium Dodecyl Sulfate and Roundup herbicide. Both are detergents that can disorder membrane structurally and functionally, which suggests that cell membrane may be a target of p-HPCD stress to cause cell growth inhibition...
March 8, 2017: Biophysical Chemistry
https://www.readbyqxmd.com/read/28306162/analysis-of-the-effects-of-several-decalcifying-agents-alone-and-in-combination-with-sodium-hypochlorite-on-the-chemical-composition-of-dentine
#5
T Tartari, L Bachmann, R F Zancan, R R Vivan, M A H Duarte, C M Bramante
AIM: To investigate the effects of several decalcifying agents alone and in combination with sodium hypochlorite (NaOCl) on the organic and inorganic components of dentine using Attenuated Total Reflectance in Fourier Transform Infrared Spectroscopy (ATR-FTIR). METHODOLOGY: Dentine slices from bovine teeth were submitted to (n=5): 0.9% saline, 9% and 18% etidronic acid (HEDP), 5% and 10% tetrasodium EDTA (EDTANa4 ), 17% trisodium EDTA (EDTAHNa3 ), and 0.5% and 2...
March 17, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28302508/synthesis-of-clarithromycin-ketolides-chemically-modified-at-the-unreactive-c10-methyl-group
#6
Hany Fakhry Anwar, Mioara Andrei, Kjell Undheim
Chemoselective substitutions in the C10-methyl group of erythromycin A ketolides is reported. The C10-methyl group in the clarithromycin derived substrate 10,11-anhydro-O(6)-methyl-descladinosylerythromycin was activated by conversion into an allyl acetate and thereafter to the corresponding allylic cyanide. Both the allylic acetate and the cyanide reacted with carbonyldiimidazole and ammonia to afford a C11,C12-cyclic carbamate with concurrent elimination of the allylic function to yield a methylene α,β-unsaturated ketone...
February 23, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/28302276/rp-uhplc-uv-esi-ms-ms-analysis-of-lpmo-generated-c4-oxidized-gluco-oligosaccharides-after-non-reductive-labeling-with-2-aminobenzamide
#7
Matthias Frommhagen, Gijs van Erven, Mark Sanders, Willem J H van Berkel, Mirjam A Kabel, Harry Gruppen
Lytic polysaccharide monooxygenases (LPMOs) are able to cleave recalcitrant polysaccharides, such as cellulose, by oxidizing the C1 and/or C4 atoms. The analysis of the resulting products requires a variety of analytical techniques. Up to now, these techniques mainly focused on the identification of non-oxidized and C1-oxidized oligosaccharides. The analysis of C4-oxidized gluco-oligosaccharides is mostly performed by using high pressure anion exchange chromatography (HPAEC). However, the alkaline conditions used during HPAEC analysis lead to tautomerization of C4-oxidized gluco-oligosaccharides, which limits the use of this technique...
March 6, 2017: Carbohydrate Research
https://www.readbyqxmd.com/read/28299401/sodium-lauryl-ether-sulfate-sles-degradation-by-nitrate-reducing-bacteria
#8
Ana M S Paulo, Rozelin Aydin, Mauricio R Dimitrov, Harm Vreeling, Ana J Cavaleiro, Pedro A García-Encina, Alfons J M Stams, Caroline M Plugge
The surfactant sodium lauryl ether sulfate (SLES) is widely used in the composition of detergents and frequently ends up in wastewater treatment plants (WWTPs). While aerobic SLES degradation is well studied, little is known about the fate of this compound in anoxic environments, such as denitrification tanks of WWTPs, nor about the bacteria involved in the anoxic biodegradation. Here, we used SLES as sole carbon and energy source, at concentrations ranging from 50 to 1000 mg L(-1), to enrich and isolate nitrate-reducing bacteria from activated sludge of a WWTP with the anaerobic-anoxic-oxic (A(2)/O) concept...
March 15, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28293195/comparative-investigation-of-copper-tolerance-and-identification-of-putative-tolerance-related-genes-in-tardigrades
#9
Thomas L Hygum, Dannie Fobian, Maria Kamilari, Aslak Jørgensen, Morten Schiøtt, Martin Grosell, Nadja Møbjerg
Tardigrades are microscopic aquatic animals renowned for their tolerance toward extreme environmental conditions. The current study is the first to investigate their tolerance toward heavy metals and we present a novel tardigrade toxicant tolerance assay based on activity assessments as a measure of survival. Specifically, we compare tolerance toward copper in four species representing different evolutionary lineages, habitats and adaptation strategies, i.e., a marine heterotardigrade, Echiniscoides sigismundi, a limno-terrestrial heterotardigrade, Echiniscus testudo, a limno-terrestrial eutardigrade, Ramazzottius oberhaeuseri, and a marine eutardigrade, Halobiotus crispae...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28287697/metal-organic-framework-derived-porous-hollow-co3o4-n-c-polyhedron-composite-with-excellent-energy-storage-capability
#10
Wenpei Kang, Yu Zhang, Lili Fan, Liangliang Zhang, Fangna Dai, Rongming Wang, Daofeng Sun
Metal-organic frameworks (MOFs) derived transition metal oxides exhibit enhanced performance in energy conversion and storage. In this work, porous hollow Co3O4 with N-doped carbon coating (Co3O4/N-C) polyhedrons have been prepared using cobalt-based MOFs as a sacrificial template. Assembled from tiny nanoparticles and N-doped carbon coating, Co3O4/N-C composite shortens the diffusion length of Li(+)/Na(+) ions and possesses an enhanced conductivity. And the porous and hollow structure is also beneficial for tolerating volume changes in the galvanostatic discharge/charge cycles as lithium/sodium battery anode materials...
March 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28287605/two-way-valorization-of-blast-furnace-slag-synthesis-of-precipitated-calcium-carbonate-and-zeolitic-heavy-metal-adsorbent
#11
Evangelos Georgakopoulos, Rafael M Santos, Yi Wai Chiang, Vasilije Manovic
The aim of this work is to present a zero-waste process for storing CO2 in a stable and benign mineral form while producing zeolitic minerals with sufficient heavy metal adsorption capacity. To this end, blast furnace slag, a residue from iron-making, is utilized as the starting material. Calcium is selectively extracted from the slag by leaching with acetic acid (2 M CH3COOH) as the extraction agent. The filtered leachate is subsequently physico-chemically purified and then carbonated to form precipitated calcium carbonate (PCC) of high purity (<2 wt% non-calcium impurities, according to ICP-MS analysis)...
February 21, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28287372/thermodesulfitimonas-autotrophica-gen-nov-sp-nov-a-thermophilic-obligate-sulfite-reducing-bacterium-isolated-from-a-terrestrial-hot-spring
#12
G B Slobodkina, R V Baslerov, A A Novikov, E A Bonch-Osmolovskaya, A I Slobodkin
A novel thermophilic, anaerobic, chemolithoautotrophic bacterium, strain SF97T, was isolated from a terrestrial hot spring (Kuril Islands, Russia). Cells of strain SF97T were rod-shaped and motile with a Gram-positive cell-wall type. The novel isolate grew at 45-72 °C (optimum 65 °C) and pH 5.5-8.5 (optimum 6.0-6.5). The strain grew chemolithoautotrophically with molecular hydrogen as an electron donor, sodium sulfite or SO2 gas as an electron acceptor and bicarbonate/CO2 as a carbon source. Sulfate, thiosulfate, elemental sulfur, Fe(III) or nitrate were not used as electron acceptors either with H2 or organic electron donors...
February 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28287220/a-nav3-po4-3-c-hierarchical-nanofiber-in-high-alignment-exploring-a-novel-high-performance-anode-for-aqueous-rechargeable-sodium-batteries
#13
Linlin Ke, Jing Dong, Bo Lin, Tiantian Yu, Huifeng Wang, Sen Zhang, Chao Deng
The development of aqueous rechargeable sodium batteries (ARSBs) demands high-performance electrode materials, especially anode materials with low operating potential and competent electrochemical properties. The lithium/sodium vanadium phosphate family with good structural stability and abundant vanadium chemistry versatility is a promising series for energy storage applications. Herein, a new member in the sodium vanadium phosphate family, i.e. NaV3(PO4)3, is introduced as a novel anode candidate for ARSBs...
March 13, 2017: Nanoscale
https://www.readbyqxmd.com/read/28286582/effects-of-the-functionalization-of-the-ordered-mesoporous-carbon-support-surface-on-iron-catalysts-for-the-fischer-tropsch-synthesis-of-lower-olefins
#14
Martin Oschatz, Jan P Hofmann, Tom W van Deelen, Wouter S Lamme, Nynke A Krans, Emiel J M Hensen, Krijn P de Jong
Ordered mesoporous carbon (CMK-3) with different surface modifications is applied as a support for Fe-based catalysts in the Fischer-Tropsch to olefins synthesis (FTO) with and without sodium and sulfur promoters. Different concentrations of functional groups do not affect the size (3-5 nm) of Fe particles in the fresh catalysts but iron (carbide) supported on N-enriched CMK-3 and a support with a lower concentration of functional groups show higher catalytic activity under industrially relevant FTO conditions (340 °C, 10 bar, H2/CO=2) compared to a support with an O-enriched surface...
February 21, 2017: ChemCatChem
https://www.readbyqxmd.com/read/28286121/high-glucose-enhances-camp-level-and-extracellular-signal-regulated-kinase-phosphorylation-in-chinese-hamster-ovary-cell-usage-of-br-camp-in-foreign-protein-%C3%AE-galactosidase-expression
#15
Hsiao-Hsien Lin, Tsung-Yih Lee, Ting-Wei Liu, Ching-Ping Tseng
Glucose is a carbon source for Chinese hamster ovary (CHO) cell growth, while low growth rate is considered to enhance the production of recombinant proteins. The present study reveals that glucose concentrations higher than 1 g/L reduce the growth rate and substantially increase in cAMP (∼300%) at a high glucose concentration (10 g/L). High glucose also enhances the phosphorylation of extracellular signal-regulated kinase (ERK) and p27(kip) by Western blot analysis. To determine whether the phosphorylation of ERK is involved in the mechanism, a cyclic-AMP dependent protein kinase A (PKA) inhibitor (H-8) or MEK (MAPKK) inhibitor (PD98059) was added to block ERK phosphorylation...
March 9, 2017: Journal of Bioscience and Bioengineering
https://www.readbyqxmd.com/read/28285261/catalase-as-a-sulfide-sulfur-oxido-reductase-an-ancient-and-modern-regulator-of-reactive-sulfur-species-rss
#16
Kenneth R Olson, Yan Gao, Eric R DeLeon, Maaz Arif, Faihaan Arif, Nitin Arora, Karl D Straub
Catalase is well-known as an antioxidant dismutating H2O2 to O2 and H2O. However, catalases evolved when metabolism was largely sulfur-based, long before O2 and reactive oxygen species (ROS) became abundant, suggesting catalase metabolizes reactive sulfide species (RSS). Here we examine catalase metabolism of H2Sn, the sulfur analog of H2O2, hydrogen sulfide (H2S) and other sulfur-bearing molecules using H2S-specific amperometric electrodes and fluorophores to measure polysulfides (H2Sn; SSP4) and ROS (dichlorofluorescein, DCF)...
March 1, 2017: Redox Biology
https://www.readbyqxmd.com/read/28282113/metabolic-activity-based-assessment-of-antimicrobial-effects-by-d2o-labeled-single-cell-raman-microspectroscopy
#17
Yifan Tao, Yun Wang, Shi Huang, Pengfei Zhu, Wei E Huang, Jun-Qi Ling, Jian Xu
To combat the spread of antibiotic resistance, methods that quantitatively assess metabolism-inhibiting effects of drugs in a rapid and culture-independent manner are urgently needed. Here using four oral bacteria as models, we show that heavy water (D2O) based Single-cell Raman Microspectroscopy (D2O-Raman) can probe bacterial response to different drugs using the Raman shift at C-D (carbon-deuterium vibration) band in 2,040 to 2,300 cm-1 as a universal biomarker for metabolic activity at single bacterial cell resolution...
March 10, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28282109/pseudocapacitive-sodium-storage-in-mesoporous-single-crystal-like-tio2-graphene-nanocomposite-enables-high-performance-sodium-ion-capacitors
#18
Zaiyuan Le, Fang Liu, Ping Nie, Xinru Li, Xiaoyan Liu, Zhenfeng Bian, Gen Chen, Hao Bin Wu, Yunfeng Lu
Sodium-ion capacitors can potentially combine the virtues of high power capability of conventional electrochemical capacitors and high energy density of batteries. However, the lack of high-performance electrode materials has been the major challenge of sodium-based energy storage devices. In this work, we report a microwave-assisted synthesis of single-crystal-like anatase TiO2 mesocages anchored on graphene as a sodium storage material. The architecture of the nanocomposite results in pseudocapacitive charge storage behavior with fast kinetics, high reversibility, and negligible degradation to the micro/nanostructure...
March 15, 2017: ACS Nano
https://www.readbyqxmd.com/read/28281884/enhanced-removal-of-napl-constituent-from-aquifer-during-surfactant-flushing-with-aqueous-hydraulic-barriers-of-high-viscosity
#19
Dayoung Ahn, Jae-Kyeong Choi, Heonki Kim
This study examines the effect of controlled groundwater flow paths induced by hydraulic barriers on the removal of NAPL constituent. An aqueous solution of thickener [0.05% (w/v) sodium carboxymethyl cellulose, SCMC] was continuously injected into a horizontally set two-dimensional physical model (sand-packed), forming aqueous plume(s) of high viscosity. The water flux at the down gradient of the model was measured using a flux tracer (n-octanol) and passive flux meter (PFM, packs of granular activated carbon)...
March 10, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28277643/insights-into-the-dual-electrode-characteristics-of-layered-na0-5ni0-25mn0-75o2-materials-for-sodium-ion-batteries
#20
Manikandan Palanisamy, Hyun Woo Kim, Seongwoo Heo, Eungje Lee, Youngsik Kim
Sodium-ion batteries are now close to replacing lithium-ion batteries because they provide superior alternative energy storage solutions that are in great demand, particularly for large-scale applications. To that end, the present study is focused on the properties of a new type of dual-electrode material, Na0.5Ni0.25Mn0.75O2, synthesized using a mixed hydroxy-carbonate route. Cyclic voltammetry confirms that redox couples, at high and low voltage ranges, are facilitated by the unique features and properties of this dual-electrode, through sodium ion deintercalation/intercalation into the layered Na0...
March 16, 2017: ACS Applied Materials & Interfaces
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