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https://www.readbyqxmd.com/read/28813138/quantifying-lake-water-quality-evolution-coupled-geochemistry-hydrodynamics-and-aquatic-ecology-in-an-acidic-pit-lake
#1
S Ursula Salmon, Matthew R Hipsey, Geoffrey W Wake, Gregory N Ivey, Carolyn E Oldham
Assessment of water quality evolution in the thousands of existing and future mine pit lakes worldwide requires new numerical tools that integrate geochemical, hydrological, and biological processes. A coupled model was used to test alternative hypothesized controls on water quality in a pit lake over ∼8 years. The evolution of pH, Al, and Fe were closely linked; field observations were reproduced with generic solubility equilibrium controls on Fe(III) and Al and a commonly reported acceleration of the abiotic Fe(II) oxidation rate by 2-3 orders of magnitude...
August 16, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28801955/single-layer-centrifugation-of-fresh-dromedary-camel-semen-improves-sperm-quality-and-in-vitro-fertilization-capacity-compared-with-simple-sperm-washing
#2
C Malo, E G Crichton, J M Morrell, B S Pukazhenthi, J A Skidmore
Single layer centrifugation (SLC) through a colloid is a tool for selecting viable mammalian spermatozoa but has not been used previously for fresh dromedary camel sperm. Semen from six camels (2 ejaculates/male) was diluted 1:5 (v:v) or 1:10 (v:v) in a Tris-citrate-fructose buffer for mechanical liquefaction by gentle pipetting. Following liquefaction, semen was processed either by SLC or by centrifugation without a colloid (control). Total and progressive motilities, CASA kinematics, vitality and acrosome integrity (eosin-nigrosin) and plasma membrane integrity (Hypo-osmotic swelling test; HOST), and fertilizing ability in a heterologous assay (zona-free goat oocytes) were evaluated...
August 12, 2017: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/28800199/intracranial-elastance-is-increased-in-idiopathic-intracranial-hypertension
#3
Jason T Chisholm, Padmaja Sudhakar, Abdulnasser N Alhajeri, Jonathan H Smith
BACKGROUND: To date, no pathophysiologic model has sufficiently accounted for all the findings encountered in patients with idiopathic intracranial hypertension (IIH). Intracranial elastance is an index of volume-buffering capacity known to play a role in certain disorders of CSF dynamics, which has not been previously investigated in relation to IIH patients. METHODS: Single-center retrospective cohort study from July 1, 2011 to July 1, 2016. We collected values for opening pressure (PO ), closing pressure (PC ), volume (V) of CSF removed, as well as demographic and clinical covariates...
August 11, 2017: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
https://www.readbyqxmd.com/read/28799951/surface-engineered-blood-adsorption-device-for-hyperphosphatemia-treatment
#4
Quan Shi, Michael Jolly, Marian G Mccord, Melanie S Joy
Correspondence: Melanie S. Joy, PharmD, PhD, University of Colorado Skaggs School of Pharmacy and Pharmaceutical Sciences, Department of Pharmaceutical Sciences, Mail Stop C238, Room V20-4108, 12850 East Montview Blvd, Aurora, CO 80045. Email: Melanie.Joy@ucdenver.eduThe research employed surface engineering methods to develop, optimize, and characterize a novel textile-based hemoadsorption device for hyperphosphatemia in hemodialysis-dependent end-stage kidney disease. Phosphate adsorbent fabrics (PAFs) were prepared by thermopressing alumina powders to polyester filtration fabrics and treatment with trimesic acid (TMA)...
August 8, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28797808/influence-of-buffer-solutions-in-the-adsorption-of-human-serum-proteins-onto-layered-double-hydroxide
#5
Diego R Gondim, Juan A Cecilia, Santângela O Santos, Thainá N B Rodrigues, José E Aguiar, Enrique Vilarrasa-García, Enrique Rodríguez-Castellón, Diana C S Azevedo, Ivanildo J Silva
The adsorption of human immunoglobulin G (IgG) and human serum albumin (HSA) on a non-calcined Mg-Al layered double hydroxide (3:1 Mg-Al LDH) was studied in batch and fixed bed experiments, focusing on the effect of buffer solution and pH over sorbent uptake. Mg-Al LDH was synthesized and characterized by X-ray diffraction (XRD), N2 adsorption-desorption isotherms at -196°C, X-ray photoelectron spectroscopy (XPS), Zero point charge (pHzpc), particle size distribution and Fourier transform infra-red (FTIR)...
August 7, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28797480/can-acclimation-of-thermal-tolerance-in-adults-and-across-generations-act-as-a-buffer-against-climate-change-in-tropical-marine-ectotherms
#6
S A Morley, K D Nguyen, L S Peck, C-H Lai, K S Tan
Thermal acclimation capacity was investigated in adults of three tropical marine invertebrates, the subtidal barnacle Striatobalanus amaryllis, the intertidal gastropod Volegalea cochlidium and the intertidal barnacle Amphibalanus amphitrite. To test the relative importance of transgenerational acclimation, the developmental acclimation capacity of A. amphitrite was investigated in F1 and F2 generations reared at a subset of the same incubation temperatures. The increase in CTmax (measured through loss of key behavioural metrics) of F0 adults across the incubation temperature range 25...
August 2017: Journal of Thermal Biology
https://www.readbyqxmd.com/read/28797049/effect-of-sodium-bicarbonate-on-prolonged-running-performance-a-randomized-double-blind-cross-over-study
#7
Tanja Freis, Anne Hecksteden, Ulf Such, Tim Meyer
BACKGROUND: The ability to sustain intense exercise seems to be partially limited by the body's capability to counteract decreases in both intra- and extracellular pH. While the influence of an enhanced buffering capacity via sodium bicarbonate (BICA) on short-term, high-intensity exercise performance has been repeatedly investigated, studies on prolonged endurance performances are comparatively rare, especially for running. The aim of the following study was to assess the ergogenic effects of an oral BICA substitution upon exhaustive intensive endurance running performance...
2017: PloS One
https://www.readbyqxmd.com/read/28792960/response-of-posidonia-oceanica-seagrass-and-its-epibiont-communities-to-ocean-acidification
#8
Katja Guilini, Miriam Weber, Dirk de Beer, Matthias Schneider, Massimiliano Molari, Christian Lott, Wanda Bodnar, Thibaud Mascart, Marleen De Troch, Ann Vanreusel
The unprecedented rate of CO2 increase in our atmosphere and subsequent ocean acidification (OA) threatens coastal ecosystems. To forecast the functioning of coastal seagrass ecosystems in acidified oceans, more knowledge on the long-term adaptive capacities of seagrass species and their epibionts is needed. Therefore we studied morphological characteristics of Posidonia oceanica and the structure of its epibiont communities at a Mediterranean volcanic CO2 vent off Panarea Island (Italy) and performed a laboratory experiment to test the effect of OA on P...
2017: PloS One
https://www.readbyqxmd.com/read/28792915/fast-rbc-loading-by-fluorescent-antibodies-and-nuclei-staining-dye-and-their-potential-bioanalytical-applications
#9
Mohamed K Al-Essa, Susanne Melzer, Attila Tarnok, Kamal A Hadidi, Mohammed El-Khateeb
This study was designed to load different antibodies (Abs) and a fluorescent dye onto the red blood cell (RBC) surface. We have used fluorescein isothiocyanate (FITC)-conjugate anti-human Ab, CD22-PE (B-cell marker-phycoerythrin Ab), and 4',6-diamidino-2-phenylindole (DAPI) for insertion over the RBC surface. In a first step, conjugation experiments were performed: in dimethyl sulfoxide (DMSO), RBCs were conserved and modified by succinic anhydride to create an additional -COOH group, and then activated with 3-(3-dimethylaminopropyl)carbodiimide-N-hydroxysuccinimide (EDC-NHS) in 2-(N-morpholino) ethanesulfonic acid hydrate buffer for insertion of labeled Abs or DAPI...
August 9, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/28791981/the-oral-adverse-effects-of-isotretinoin-treatment-in-acne-vulgaris-patients-a-prospective-case-control-study
#10
U Erdemir, G Okan, S Gungor, B Tekin, S O Yildiz, E Yildiz
BACKGROUND: Isotretinoin is the most effective therapy to treat severe acne vulgaris and its systemic adverse effects have been well documented, but little is known on dental side effects over the course of treatment. OBJECTIVES: This prospective case-control study aimed to evaluate the oral adverse effects of isotretinoin in Turkish patients with acne vulgaris; compare oral conditions between patients and normal controls; and investigate the association between salivary parameters and International Caries Detection and Assessment System (ICDAS) scores...
July 2017: Nigerian Journal of Clinical Practice
https://www.readbyqxmd.com/read/28780358/formation-reactivity-and-aging-of-amorphous-ferric-oxides-in-the-presence-of-model-and-membrane-bioreactor-derived-organics
#11
Mark W Bligh, Pradeep Maheshwari, T David Waite
Iron salts are routinely dosed in wastewater treatment as a means of achieving effluent phosphorous concentration goals. The iron oxides that result from addition of iron salts partake in various reactions, including reductive dissolution and phosphate adsorption. The reactivity of these oxides is controlled by the conditions of formation and the processes, such as aggregation, that lead to a reduction in accessible surface sites following formation. The presence of organic compounds is expected to significantly impact these processes in a number of ways...
July 31, 2017: Water Research
https://www.readbyqxmd.com/read/28779982/redox-sensitive-cationic-pullulan-for-efficient-gene-transfection-and-drug-retention-in-c6-glioma-cells
#12
Priya S S, Rekha M R
Thiolated cationic pullulan was synthesized by conjugating pullulan with polyethyleneimine (PEI) and mercaptosuccinic acid (MSA). The formed conjugate was oxidized to obtain disulfide linked cationic pullulan (PPMSS). PPMSS exhibited good buffering capacity and nanoplexes formulated were of size less than 150nm. Nanoplexes formed with PPMSS are redox sensitive and susceptible to reductive cleavage by dithiothreitol (DTT) ensuring the intracellular release of DNA. In vitro, cytotoxic evaluation studies of polymers in C6 cell lines established its non-toxic nature...
August 2, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28776972/controlled-zn2-triggered-drug-release-by-preferred-coordination-of-open-active-sites-within-functionalization-indium-metal-organic-frameworks
#13
Xi Du, Ruiqing Fan, Liangsheng Qiang, Kai Xing, Haoxin Ye, Xinya Ran, Yang Song, Ping Wang, Yulin Yang
Drug delivery in target regions could make extraordinary progress in chemo-selective therapies. A novel preferred coordination (PC) strategy referring to proactive interacting with open active sites to replace previous occupation by ion-exchange for controlling release of drug molecules is well constructed. Two topological types of MOF-In1 (Schläfli symbol: (4,8)-connected of (410·615·83)(45·6)2) and MOF-In2 (Schläfli symbol: (4,4)-connected of (66)) show the specific way. Increasing node connectivity as well as the trapping of guest OH- anions, 5-fluorouracil (5-FU) is preferentially captured into the MOF-In1, which exhibits an outstanding loading capacity around 34...
August 4, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28767709/improved-biogas-production-and-biodegradation-of-oilseed-rape-straw-by-using-kitchen-waste-and-duck-droppings-as-co-substrates-in-two-phase-anaerobic-digestion
#14
Chuqiao Wang, Feng Hong, Yong Lu, Xianning Li, Hengming Liu
Oilseed rape straw (ORS) is a kind of biorefractory waste widely existing in the rural area of China, which is highly suitable to mix with kitchen waste (KW) and duck droppings (DD) in two-phase anaerobic digestion (AD). This research introduced the importance of KW and DD addition to improve the biogas production and biodegradation of ORS. A set of comparative experiments were conducted on two-phase mono- and co-digestion with organic load of 60 g VS/L. The total methane yield (TMY) and the biodegradation of ORS of co-digestions were obviously improving, and the synergistic effect found in the two-phase co-digestions...
2017: PloS One
https://www.readbyqxmd.com/read/28766947/creatine-monohydrate-enhances-energy-status-and-reduces-glycolysis-via-inhibition-of-ampk-pathway-in-pectoralis-major-muscle-of-transport-stressed-broilers
#15
Lin Zhang, Xiaofei Wang, Jiaolong Li, Xudong Zhu, Feng Gao, Guanghong Zhou
Creatine monohydrate (CMH) contributes to reduce transport-induced muscle rapid glycolysis and improve meat quality of broilers, but the underlying mechanism is still unknown. Therefore, this study aimed to investigate the molecular mechanisms underlying the ameliorative effects of CMH on muscle glycolysis metabolism of transported broilers during summer. The results showed that 3 h transport during summer elevated chicken live weight loss and plasma corticosterone concentration; decreased muscle concentrations of ATP, creatine, and energy charge value; increased muscle AMP concentration and AMP/ATP ratio; and upregulated muscle mRNA expression of LKB1 and AMPKα2, as well as protein expression of p-LKB1(Thr189) and p-AMPKα(Thr172), which subsequently resulted in rapid glycolysis in the pectoralis major muscle and consequent reduction of meat quality...
August 16, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28766479/an-hplc-method-for-the-determination-of-isoflavones-and-the-evaluation-of-their-antioxidant-capacity-in-both-homogeneous-and-microheterogeneous-systems
#16
Guillermo Montero, Germán Günther, Karina Valdés, Francisco Arriagada, Javier Morales
In this work, we developed an HPLC method to simultaneously quantify and hence evaluate the stability, distribution, and antioxidant capacity of six isoflavones: genistein, genistin, daidzein, daidzin, glycitin, and biochanin A. Isoflavones have been described as having an important estrogenic activity to treat menopausal symptoms and can reduce postmenopausal bone loss and also participate in the prevention of cardiovascular diseases. These beneficial properties are believed derived from their capacity to act as free-radical scavengers...
August 2, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/28759793/modelling-recovery-of-ammonium-from-urine-by-electro-concentration-in-a-3-chamber-cell
#17
Emma Thompson Brewster, Johannes Jermakka, Stefano Freguia, Damien J Batstone
Electro-concentration enables treatment and nutrient recovery from source-separated urine, and is a potential technology for on-site treatment using a 3 compartment configuration that has anode, cathode and middle concentrate compartments. There is a particular focus on driving concentration towards the precipitation threshold in the concentrate compartment to generate solid ammonium salts, including ammonium bicarbonate. To evaluate controlling mechanisms and the feasibility of achieving high concentrations, a dynamic mechanistic model was developed and validated using experiments with synthetic urine...
July 20, 2017: Water Research
https://www.readbyqxmd.com/read/28758977/seed-coating-with-hydro-absorbers-as-potential-mitigation-of-early-season-drought-in-sorghum-sorghum-bicolor-l-moench
#18
Linda Gorim, Folkard Asch
Climate change poses a threat to sorghum production systems by shifting the onset of the rainy season to a later date, increasing the risk of crop failure during crop establishment. The effects of drought on sorghum during seedling establishment have not been determined. Coating seeds with a water absorbing substance offers a way to buffer the seed against insufficient moisture in the surrounding soil. Seeds of two different sorghum varieties were coated with one of two commercially available hydro-absorbers: Stokosorb(®) and Geohumus(®)...
July 31, 2017: Biology
https://www.readbyqxmd.com/read/28757419/insights-into-physicochemical-and-functional-properties-of-polysaccharides-sequentially-extracted-from-onion-allium-cepa-l
#19
Dan-Ye Zhu, Yi-Long Ma, Cai-Hong Wang, Hao Wang, Ya-Fei Ren, Jian-Guo Zhang, Kiran Thakur, Zhao-Jun Wei
Onion polysaccharides (ACLP) were sequentially extracted with four different solvents (hot buffer, chelating agent, dilute alkaline and concentrated alkaline) and obtained four fractions, named as HBSS, CHSS, DASS and CASS, respectively. The present studies characterized the ACLP concerning its physicochemical and functional properties. Monosaccharides analysis revealed that mannose (81.68%) was the dominant sugar in HBSS and galactose (67.59%) was the most in CASS. Similarly, CHSS and DASS possessed mannose and galactose as major sugar, which were 25...
July 27, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28753489/a-versatile-method-for-fabricating-ion-exchange-hydrogel-nanofibrous-membranes-with-superb-biomolecule-adsorption-and-separation-properties
#20
Huan Lv, Xueqin Wang, Qiuxia Fu, Yang Si, Xia Yin, Xiaoran Li, Gang Sun, Jianyong Yu, Bin Ding
Construction ion-exchange membranes with superb biomolecules adsorption and purification performance plays a greatly important role in the fields of biotechnological and biopharmaceutical industry, yet still remains an extremely challenging. Herein, we in situ synthesized the cis-butenedioic anhydride grafted poly(vinyl alcohol) hydrogel nanofibrous membranes (CBA-g-PVA HNFM) by combining electrospinning technique with the grafting-copolymerization crosslinking. Taking advantages of the large specific surface area which could provide numerous sites available for functional groups and biomolecules binding, highly tortuous and interconnected porous channel for biomolecules transfer, and enhanced mechanical strength, the resultant CBA-g-PVA HNFM exhibited relatively high binding amount of 170mgg(-1), rapid equilibrium time of 8h towards the biomolecule template of lysozyme, and the performance could be tailored by regulating the buffer properties and protein concentrations...
July 18, 2017: Journal of Colloid and Interface Science
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