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https://www.readbyqxmd.com/read/28431348/evaluation-of-structural-effects-on-the-flocculation-performance-of-a-co-graft-starch-based-flocculant
#1
Zhouzhou Liu, Hua Wei, Aimin Li, Hu Yang
The molecular structure of a material substantially determines its final application performance. In this work, a series of starch-based flocculants with different charge densities and average graft chain lengths were prepared by the co-graft polymerization of acrylamide and [(2-methacryloyloxyethyl) trimethyl ammonium chloride] (St-g-PAM-co-PDMC). The flocculation performance of St-g-PAM-co-PDMC was studied systematically at neutral pH using kaolin suspension and sodium humate (NaHA) aqueous solution as synthetic wastewaters...
April 18, 2017: Water Research
https://www.readbyqxmd.com/read/28430359/sulfur-containing-gaseous-signal-molecules-ion-channels-and-cardiovascular-diseases
#2
REVIEW
Wen Yu, Hongfang Jin, Chaoshu Tang, Junbao Du, Zhiren Zhang
Sulfur-containing gaseous signal molecules including hydrogen sulfide (H2 S) and sulfur dioxide (SO2 ) were previously recognized as toxic gases. However, extensive studies have revealed that they can be generated in the cardiovascular system via a sulfur-containing amino acid metabolic pathway, playing an important part in cardiovascular physiology and pathophysiology. Ion channels are pore-forming membrane proteins present in the membrane of all biological cells; functions include establishing a resting membrane potential and controlling action potentials and other electrical signals by conducting ions across the cell membrane...
April 21, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28429167/corynebacterium-defluvii-sp-nov-isolated-from-sewage
#3
Qiu-Li Yu, Zheng-Fei Yan, Xin He, Feng-Hua Tian, Chuan-Wen Jia, Chang-Tian Li
A Gram-positive, aerobic, non-motile, rod-shapeds, cata-lase-positive, and oxidase-negative strain, designated Y49(T), was isolated from sewage collected from Jilin Agricultural University, China. It grew at 20-40°C (optimum at 30°C), at pH 6.0-8.0 (optimum at 7.0) and at 0-1.0% sodium chloride (optimum at 0%). The major isoprenoid quinone was menaquinone-8 (MK-8) and the polar lipids were diphosphatidylglycerol, phosphatidylglycerol, phosphatidylmethylethanolamine, four unidentified lipids, and two unidentified aminolipids...
April 20, 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/28428894/the-protective-role-of-hyaluronic-acid-in-cr-vi-induced-oxidative-damage-in-corneal-epithelial-cells
#4
Wei Wu, Hua Jiang, Xinnian Guo, Yu Wang, Shibo Ying, Lingfang Feng, Tao Li, Hailing Xia, Yixiao Zhang, Riping Chen, Tianhui Chen, Jianlin Lou
Cr(VI) exposure could produce kinds of intermediates and reactive oxygen species, both of which were related to DNA damage. Hyaluronan (HA) has impressive biological functions and was reported to protect corneal epithelial cells against oxidative damage induced by ultraviolet B, benzalkonium chloride, and sodium lauryl sulfate. So the aim of our study was to investigate HA protection on human corneal epithelial (HCE) cells against Cr(VI)-induced toxic effects. The HCE cell lines were exposed to different concentrations of K2Cr2O7 (1...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/28428760/the-variation-tendency-of-polyamines-forms-and-components-of-polyamine-metabolism-in-zoysiagrass-zoysia-japonica-steud-to-salt-stress-with-exogenous-spermidine-application
#5
Shucheng Li, Linlin Cui, Yujuan Zhang, Yunwen Wang, Peisheng Mao
To understand dynamic changes in polyamines (PAs) forms and components of polyamine metabolism in zoysiagrass (Zoysia japonica Steud.) response to salt stress with exogenous spermidine (Spd) application, two Chinese zoysia cultivars, z081 and z057, were exposed to sodium chloride stress for 2, 4, 6, and 8 days. The z057 cultivar possesses higher salinity tolerance than the z081 cultivar. Salt stress decreased the zoysiagrass fresh weight (FW) and increased free Spd and spermine (Spm) levels and soluble and insoluble putrescine (Put), Spd and Spm levels in both cultivars...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28427006/regeneration-of-pilot-scale-ion-exchange-columns-for-hexavalent-chromium-removal
#6
Julie A Korak, Richard Huggins, Miguel Arias-Paic
Due to stricter regulations, some drinking water utilities must implement additional treatment processes to meet potable water standards for hexavalent chromium (Cr(VI)), such as the California limit of 10 μg/L. Strong base anion exchange is effective for Cr(VI) removal, but efficient resin regeneration and waste minimization are important for operational, economic and environmental considerations. This study compared multiple regeneration methods on pilot-scale columns on the basis of regeneration efficiency, waste production and salt usage...
March 9, 2017: Water Research
https://www.readbyqxmd.com/read/28426384/a-2-year-old-boy-with-circulatory-failure-owing-to-streptococcal-toxic-shock-syndrome-case-report
#7
Werner Keenswijk, Johan Vande Walle
A 2-year-old boy presented with severe hypotension and acute kidney injury after a prodrome of non-bloody diarrhoea and fever in the preceding 3 days. He had a mild Ebstein cardiac anomaly but otherwise a normal past history and growth. On examination, he looked ill, his temperature was 37.5 °C, circulation was poor, and there were several purpuric lesions on the face, hands and scrotum. Haemoglobin was 7.8 g/dL (11-14), total white cell count 27 × 10(9)/L, platelets 62 × 10(9)/L, blood urea nitrogen 20...
April 20, 2017: Paediatrics and International Child Health
https://www.readbyqxmd.com/read/28426183/mass-production-of-cell-laden-calcium-alginate-particles-with-centrifugal-force
#8
Yuya Morimoto, Maiko Onuki, Shoji Takeuchi
This paper describes a centrifuge-based device for oil-free and mass production of calcium-alginate (Ca-alginate) particles. The device is composed of four components: a tank with a glass capillary for forming sodium alginate droplets, a collecting bath with calcium chloride (CaCl2 ) solution, a waste liquid box, and a bypass channel bridged between the collecting bath and the waste liquid box. When the device is centrifuged, extra CaCl2 solution in the collecting bath is delivered to the waste liquid box to maintain the appropriate liquid level of CaCl2 solution for the production of monodisperse Ca-alginate particles...
April 20, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28425711/influence-of-surfactants-on-sodium-chloride-crystallization-in-confinement
#9
Mohsin J Qazi, Rinse W Liefferink, Simon J Schlegel, Ellen H G Backus, Daniel Bonn, Noushine Shahidzadeh
We study the influence of different surfactants on NaCl crystallization during evaporation of aqueous salt solutions. We found that at concentrations of sodium chloride close to saturation, only the cationic surfactant CTAB and the nonionic surfactant Tween 80 remain stable. For the nonionic surfactant, the high concentration of salt does not significantly change either the critical micellar concentration (CMC) or the surface tension at the CMC; for the cationic surfactant, the CMC is reduced by roughly 2 orders of magnitude upon adding the salt...
April 20, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28425228/the-effects-of-the-chloride-sodium-ratio-on-acid-base-statusand-mortality-in-septic-patients
#10
Hakan Korkut Atalan, Bülent Güçyetmez
BACKGROUND/AIM: Calculation of the chloride:sodium (Cl(-):Na(+)) ratio is proposed to enable a quick evaluation of the effect of Cl(-) and Na(+) on the acid-base balance in critically ill patients. In the present study, the relationship of the Cl(-):Na(+) ratio of septic patients with acid-base status and ICU mortality were investigated. MATERIALS AND METHODS: In our two-center study, 434 patients who were diagnosed with sepsis were included. The patients were divided into three groups: low (<0...
April 18, 2017: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/28422535/comparison-between-normal-saline-and-ringer-s-acetate-in-bipolar-transurethral-resection-of-the-prostate
#11
Ehab Ahmed, Jacob Ingvar, Claes R Nyman, Ulf Norming, Emma Andersson, Robert G Hahn, Tim Fagerström
OBJECTIVE: The standard surgical treatment for benign prostatic hypertrophy (BPH) is transurethral resection of the prostate (TURP). The aim of this study was to compare normal saline (NS) (0.9% sodium chloride) and Ringer's acetate (RA) as irrigation fluid with regard to visibility, resection feasibility, coagulation and bleeding in bipolar TURP. MATERIALS AND METHODS: Twenty patients (mean age 70 years) who were diagnosed with BPH were recruited to the study. The first three 3 liter bags of irrigation fluid contained either NS or RA and were administered in a randomized fashion...
April 19, 2017: Scandinavian Journal of Urology
https://www.readbyqxmd.com/read/28421299/compared-effects-of-calcium-and-sodium-polystyrene-sulfonate-on-mineral-and-bone-metabolism-and-volume-overload-in-pre-dialysis-patients-with-hyperkalemia
#12
Yosuke Nakayama, Kaoru Ueda, Sho-Ichi Yamagishi, Miki Sugiyama, Chika Yoshida, Yuka Kurokawa, Nao Nakamura, Tomofumi Moriyama, Goh Kodama, Tomohisa Minezaki, Sakuya Ito, Akiko Nagata, Kensei Taguchi, Junko Yano, Yusuke Kaida, Kazutaka Shibatomi, Kei Fukami
BACKGROUND: Hyperkalemia is prevalent in end-stage renal disease patients, being involved in life-threatening arrhythmias. Although polystyrene sulfonate (PS) is commonly used for the treatment of hyperkalemia, direct comparison of effects between calcium and sodium PS (CPS and SPS) on mineral and bone metabolism has not yet been studied. METHODS: In a randomized and crossover design, 20 pre-dialysis patients with hyperkalemia (>5 mmol/l) received either oral CPS or SPS therapy for 4 weeks...
April 18, 2017: Clinical and Experimental Nephrology
https://www.readbyqxmd.com/read/28420859/ultrastructural-and-physico-chemical-characterization-of-saliva-during-menstrual-cycle-in-perspective-of-ovulation-in-human
#13
Ganesan Saibaba, Mahalingam Srinivasan, Archunan Priya Aarthy, Velliyangiri Silambarasan, Govindaraju Archunan
Human saliva is a potential diagnostic fluid and any alteration in body might be reflected in saliva so that saliva is considered as "mirror of the body". Variations in salivary hormone level, ultra structure, pH, flow rate, buffering capacity and electrolytes level are found during menstrual cycle in regard to ovulation. Thirty healthy volunteers were used for the assessment of physico-chemical changes in saliva. Reproductive cycle was categorized as pre-ovulation phase (5 to 12 days), ovulation phase (13 or 14 days) and post-ovulation phase (15 to 25 days) according to salivary arborization test and hormonal analysis...
April 14, 2017: Drug Discoveries & Therapeutics
https://www.readbyqxmd.com/read/28420042/determination-of-reference-intervals-of-acid-base-parameters-in-clinically-healthy-dogs
#14
Ivana Vanova-Uhrikova, Leona Rauserova-Lexmaulova, Kristina Rehakova, Peter Scheer, Jaroslav Doubek
OBJECTIVE: To establish reference intervals for traditionally- and Stewart's approach-determined acid-base parameters in a population of clinically healthy dogs. DESIGN: Prospective study (June 2011-September 2012). SETTING: Veterinary teaching hospital. ANIMALS: Two hundred twenty-four client-owned, clinically healthy dogs. INTERVENTIONS: Blood was collected from the jugular vein and the dorsal pedal artery...
April 18, 2017: Journal of Veterinary Emergency and Critical Care
https://www.readbyqxmd.com/read/28418601/to-arginine-residues-in-the-cooh-terminal-of-human-%C3%AE-defensin-3-constitute-an-essential-motif-for-antimicrobial-activity-and-il-6-production
#15
Yoko Sakagami-Yasui, Yoshinori Shirafuji, Osamu Yamasaki, Shin Morizane, Toshihisa Hamada, Hiroshi Umemura, Keiji Iwatsuki
Human β-defensin-3 (HBD-3) possesses antimicrobial activities and the potential to induce proinflammatory cytokines. HBD-3 contains a unique motif of two arginine residues (Arg. R) in the COOH-terminal region. To understand the bioactive properties of the Arg residues of HBD-3, we examined antimicrobial activities against S. aureus and P. aeruginosa using synthetic HBD-2, HBD-3, and two variant peptides of HBD-3: the Arg-truncated variant designated desR HBD-3, and NRR HBD-3, in which both Arg residues were shifted to the N-terminal region...
April 18, 2017: Experimental Dermatology
https://www.readbyqxmd.com/read/28418580/effect-of-surfactant-species-and-electrophoretic-medium-composition-on-the-electrophoretic-behavior-of-neutral-and-water-insoluble-linear-synthetic-polymers-in-nonaqueous-capillary-zone-electrophoresis
#16
Nao Fukai, Shinya Kitagawa, Hajime Ohtani
We have recently demonstrated the separation of neutral and water-insoluble linear synthetic polymers in non-aqueous capillary zone electrophoresis (NACZE) using a cationic surfactant of cetyltrimethylammonium chloride (CTAC). In this study, eight ionic surfactants were investigated for the separation of four synthetic polymers (polystyrene, polymethylmethacrylates, polybutadiene, and polycarbonate); only three surfactants (CTAC, dimethyldioctadecylammonium bromide, and sodium dodecylsulfate) caused their separation...
April 18, 2017: Electrophoresis
https://www.readbyqxmd.com/read/28416883/application-of-electrolysed-oxidising-water-as-a-sanitiser-to-extend-the-shelf-life-of-seafood-products-a-review
#17
REVIEW
Fera R Dewi, Roger Stanley, Shane M Powell, Christopher M Burke
Electrolysed oxidising water (E.O. water) is produced by electrolysis of sodium chloride to yield primarily chlorine based oxidising products. At neutral pH this results in hypochlorous acid in the un-protonated form which has the greatest oxidising potential and ability to penetrate microbial cell walls to disrupt the cell membranes. E.O. water has been shown to be an effective method to reduce microbial contamination on food processing surfaces. The efficacy of E.O. water against pathogenic bacteria such as Listeria monocytogenes, Escherichia coli and Vibrio parahaemolyticus has also been extensively confirmed in growth studies of bacteria in culture where the sanitising agent can have direct contact with the bacteria...
April 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28416372/effects-of-bilobalide-ginkgolide-b-and-picrotoxinin-on-gabaa-receptor-modulation-by-structurally-diverse-positive-modulators
#18
Chiu Chin Ng, Rujee K Duke, Tina Hinton, Graham A R Johnston
Anxiolytics and anticonvulsants generally positively modulate the action of GABA, whereas many convulsants (including the chloride channel blocker picrotoxinin) negatively modulate the action of GABA on GABAA receptors. Like picrotoxinin, bilobalide and ginkgolide B, active constituents of Ginkgo biloba, have been shown to negatively modulate the action of GABA at α1β2γ2L GABAA receptors. However, unlike picrotoxinin, bilobalide and ginkgolide B are not known to cause convulsions. We have assessed the action of bilobalide, ginkgolide B and picrotoxinin on a range of GABAA modulators (etomidate, loreclezole, propofol, thiopentone sodium, diazepam, and allopregnanolone), using two-electrode voltage clamp electrophysiology at recombinant α1β2γ2L GABAA receptors expressed in Xenopus oocytes...
April 14, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28416347/blood-collection-vials-and-clinically-used-intravenous-fluids-contain-significant-amounts-of-nitrite
#19
Luis E F Almeida, Sayuri Kamimura, Margaret Y Nettleton, Celia M de Souza Batista, Elizabeth Walek, Alfia Khaibullina, Li Wang, Zenaide M N Quezado
The biology of the inorganic anion nitrite is linked to nitric oxide (NO) as nitrite can be reduced to NO and mediate its biological activities. Thus, studies of nitrite biology require sensitive and selective chemical assays. The acetic and ascorbic acids method is selective for nitrite and measures it in biological matrices. However, one of the pitfalls of nitrite measurements is its ubiquitous presence in sample collection tubes. Here, we showed high levels of nitrite in collection tubes containing EDTA, sodium citrate or sodium heparin and smaller amounts in tubes containing lithium heparin or serum clot activator...
April 14, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28415515/highly-selective-thiocyanate-optochemical-sensor-based-on-manganese-iii-salophen-ionophore
#20
Fatehy M Abdel-Haleem, Mahmoud S Rizk
We report on the development of optochemical sensor based on Mn(III)-salophen ionophore. The sensor was prepared by embedding the ionophore in a plasticized poly (vinyl chloride) impregnated with the chromoionophore ETH7075. Optical response to thiocyanate occurred due to thiocyanate extraction into the polymer via formation of strong complex with the ionophore and simultaneous protonation of the indicator dye yielding the optical response at 545nm. The developed optochemical sensor exhibited high selectivity for thiocyanate over other anions including the most lipophilic species such as salicylate and perchlorate...
June 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
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