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https://www.readbyqxmd.com/read/28339491/the-dynamics-of-nitrogen-derived-from-a-chemical-nitrogen-fertilizer-with-treated-swine-slurry-in-paddy-soil-plant-systems
#1
Joonhee Lee, Hong L Choi
A well-managed chemical nitrogen (N) fertilization practice combined with treated swine slurry (TSS) is necessary to improve sustainability and N use efficiency in rice farming. However, little is known about the fate of N derived from chemical N fertilizer with and without TSS in paddy soil-plant systems. The objectives of this study were (1) to estimate the contribution of applied N fertilizer to N turnover in rice paddy soil with different N fertilization practices that were manipulated by the quantity of treated swine slurry and chemical N fertilizer (i...
2017: PloS One
https://www.readbyqxmd.com/read/28338895/photosynthesis-nutrient-accumulation-and-growth-of-two-betula-species-exposed-to-waterlogging-in-late-dormancy-and-in-the-early-growing-season
#2
Ai-Fang Wang, Marja Roitto, Tarja Lehto, Sirkka Sutinen, Jaakko Heinonen, Gang Zhang, Tapani Repo, Ram Oren
Increased risk of soil waterlogging in winter and spring at northern latitudes will potentially affect forest production in the future. We studied gas exchange, chlorophyll content index, chlorophyll fluorescence, nutrient concentration and biomass accumulation in 1-year-old silver (Betula pendula Roth) and pubescent birch (Betula pubescens Ehrh.) seedlings. We hypothesized that B. pubescens has different physiological mechanisms that make it tolerate waterlogging better than B. pendula. The treatments were: (i) no waterlogging throughout the experiment; (ii) 4-week waterlogging during dormancy (dormancy waterlogging 'DW'); (iii) 4-week waterlogging during the early growing season (growth waterlogging 'GW'); and (iv) 4-week DW followed by 4-week GW during the early growing season ('DWGW')...
March 15, 2017: Tree Physiology
https://www.readbyqxmd.com/read/28338729/revealing-the-roles-of-gork-channels-and-nadph-oxidase-in-acclimation-to-hypoxia-in-arabidopsis
#3
Feifei Wang, Zhong-Hua Chen, Xiaohui Liu, Timothy D Colmer, Lana Shabala, Anya Salih, Meixue Zhou, Sergey Shabala
Regulation of root cell K+ is essential for acclimation to low oxygen stress. The potential roles of GORK (depolarization-activated guard cell outward-rectifying potassium) channels and RBOHD (respiratory burst oxidase homologue D) in plant adaptive responses to hypoxia were investigated in the context of tissue specificity (epidermis versus stele; elongation versus mature zone) in roots of Arabidopsis. The expression of GORK and RBOHD was down-regulated by 2- to 3-fold within 1 h and 24 h of hypoxia treatment in Arabidopsis wild-type (WT) roots...
October 19, 2016: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28338094/in-situ-raman-spectroscopy-to-elucidate-the-influence-of-adsorption-in-graphene-electrochemistry
#4
Wesley T E van den Beld, Mathieu Odijk, René H J Vervuurt, Jan-Willem Weber, Ageeth A Bol, Albert van den Berg, Jan C T Eijkel
Electrochemistry on graphene is of particular interest due to graphene's high surface area, high electrical conductivity and low interfacial capacitance. Because the graphene Fermi level can be probed by its strong Raman signal, information on the graphene doping can be obtained which in turn can provide information on adsorbed atoms or molecules. For this paper, the adsorption analysis was successfully performed using three electroactive substances with different electrode interaction mechanisms: hexaammineruthenium(III) chloride (RuHex), ferrocenemethanol (FcMeOH) and potassium ferricyanide/potassium ferrocyanide (Fe(CN)6)...
March 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28336934/low-frequency-stimulation-of-the-primary-focus-retards-positive-transfer-of-secondary-focus
#5
Yifang Kuang, Cenglin Xu, Yinxi Zhang, Yi Wang, Xiaohua Wu, Ying Wang, Yao Liu, Kai Zhong, Hui Cheng, Yi Guo, Shuang Wang, Meiping Ding, Zhong Chen
Positive transfer of secondary focus (PTS) refers to new epileptogenesis outside the primary focus and is minimally controlled by existing treatments. Low-frequency stimulation (LFS) has benefits on the onset of epilepsy and epileptogenesis. However, it's unclear whether LFS can retard the PTS in epilepsy. Here we found that PTS at both contralateral amygdala and ipsilateral hippocampus were promoted after the primary focus was fully kindled in rat kindling model. The promotion of PTS at the mirror focus started when the primary kindling acquisition reached focal seizures...
March 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28334357/sweetener-intake-by-rats-selectively-bred-for-differential-saccharin-intake-sucralose-stevia-and-acesulfame-potassium
#6
Nancy K Dess, Kiana Dobson, Brandon T Roberts, Clinton D Chapman
Behavioral responses to sweeteners have been used to study the evolution, mechanisms, and functions of taste. Occidental low and high saccharin consuming rats (respectively, LoS and HiS) have been selectively outbred on the basis of saccharin intake and are a valuable tool for studying variation among individuals in sweetener intake and its correlates. Relative to HiS rats, LoS rats consume smaller amounts of all nutritive and nonnutritive sweeteners tested to date, except aspartame. The lines also differ in intake of the commercial product Splenda; the roles of sucralose and saccharides in the difference are unclear...
March 15, 2017: Chemical Senses
https://www.readbyqxmd.com/read/28327718/can-charged-colloidal-particles-increase-the-thermoelectric-energy-conversion-efficiency
#7
Thomas J Salez, Bo Tao Huang, Maud Rietjens, Marco Bonetti, Cécile Wiertel-Gasquet, Michel Roger, Cleber Lopes Filomeno, Emmanuelle Dubois, Régine Perzynski, Sawako Nakamae
Currently, liquid thermocells are receiving increasing attention as an inexpensive alternative to conventional solid-state thermoelectrics for low-grade waste heat recovery applications. Here we present a novel path to increase the Seebeck coefficient of liquid thermoelectric materials using charged colloidal suspensions; namely, ionically stabilized magnetic nanoparticles (ferrofluids) dispersed in aqueous potassium ferro-/ferri-cyanide electrolytes. The dependency of thermoelectric potential on experimental parameters such as nanoparticle concentration and types of solute ions (lithium citrate and tetrabutylammonium citrate) is examined to reveal the relative contributions from the thermogalvanic potential of redox couples and the entropy of transfer of nanoparticles and ions...
March 22, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28322969/arsenic-cadmium-mercury-sodium-and-potassium-concentrations-in-common-foods-and-estimated-daily-intake-of-the-population-in-valdivia-chile-using-a-total-diet-study
#8
Ociel Muñoz, Pedro Zamorano, Olga Garcia, José Miguel Bastías
This study was designed to estimate the dietary intake of total arsenic, inorganic arsenic, cadmium, mercury, sodium, and potassium by the general adult population (aged 18-65) of Valdivia, Chile. Calculations were based on a 24-h dietary recall survey. The highest dietary intake of t-As (73.0 μg/day), i-As (20.0 μg/day), Cd (18.0 μg/day), Hg (5.8 μg/day), Na(+) (3112.8 mg/day), and K(+) (2077.5 mg/day) were for 70-kg adults. Estimating carcinogenic risk (CR > 4 × 10(-4)) due to exposure to i-As indicated that consumers remain at low risk for cancer...
March 16, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28322186/effect-of-isoflurane-anesthesia-on-circadian-metabolism-and-physiology-in-rats
#9
Melissa A Wren-Dail Robert T Dauchy David E Blask Steven M Hill Tara G Ooms Lynell M Dupepe And Rudolf P Bohm
Isoflurane anesthesia alters the blood levels of several neuroendocrine hormones associated with normal metabolism andphysiology and increases stress, but the effect of brief CO2 anesthesia on these parameters is unknown. In this study, we examined the effects of isoflurane (4%) compared with brief CO2 (70% CO2, 30% air) anesthesia on circadian rhythms of plasma measures of physiology and metabolism. Adult male Sprague-Dawley rats (Crl:SD; n = 6 per group) were maintained on a 12:12-h light:dark(300 lx; lights on, 0600) photoperiod...
March 20, 2017: Comparative Medicine
https://www.readbyqxmd.com/read/28320163/inhibition-of-17-beta-estradiol-on-neuronal-excitability-via-enhancing-girk1-mediated-inwardly-rectifying-potassium-currents-and-girk1-expression
#10
Yuwen Zhang, Yian Huang, Guoxiang Wang, Xin Wang, Yun Wang
BACKGROUND: Catamenial epilepsy is a common central nervous system disease in female, which is influenced by the 17-β-estradiol (estrogen) level during the menstrual cycle. Low level (<0.05ng/ml) of estrogen normally accompanies with the perimenstrual classification of catamenial epilepsy, however, without clear mechanism. In previous studies, estrogen has been demonstrated to possess widely regulatory effects on potassium channels. Here, the effect of 17-β-estradiol on modulating inwardly rectifying K(+) (Kir) currents was investigated in cultured hippocampal neurons...
April 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28318488/computational-models-of-o-lm-cells-are-recruited-by-low-or-high-theta-frequency-inputs-depending-on-h-channel-distributions
#11
Vladislav Sekulić, Frances K Skinner
Although biophysical details of inhibitory neurons are becoming known, it is challenging to map these details onto function. Oriens-lacunosum/moleculare (O-LM) cells are inhibitory cells in the hippocampus that gate information flow, firing while phase-locked to theta rhythms. We build on our existing computational model database of O-LM cells to link model with function. We place our models in high-conductance states and modulate inhibitory inputs at a wide range of frequencies. We find preferred spiking recruitment of models at high (4-9 Hz) or low (2-5 Hz) theta depending on, respectively, the presence or absence of h-channels on their dendrites...
March 20, 2017: ELife
https://www.readbyqxmd.com/read/28302238/gitelman-syndrome
#12
Qurat Ul Ain Mustafa, Zujaja Hina Haroon, Aamir Ijaz, Muhammad Tanveer Sajid, Muhammad Ayyub
Gitelman syndrome (GS) is the most frequently inherited renal salt-wasting tubulointerstitial disease. It follows variable but usually asymptomatic benign course. We present a rare case of GS that remained clinical enigma. A 22-year male presented with severe episodic fatigue involving all limbs associated with episodes of sinking, palpitations, salt craving, increased thirst and frequent micturition hampering his routine daily activities. Laboratory workup revealed serum potassium, 2.7 mmol/L, serum magnesium, 0...
March 2017: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
https://www.readbyqxmd.com/read/28300540/detection-of-potassium-channel-kir4-1-antibodies-in-multiple-sclerosis-patients
#13
Fabiana Marnetto, Paola Valentino, Marzia Caldano, Antonio Bertolotto
The presence of KIR4.1 antibodies has been proposed to be a characteristic of Multiple Sclerosis (MS). This could have a significant impact on disease management. However, the validation of the initial findings has failed till date. Conflicting results have been attributed to difficulties in isolating the lower-glycosylated (LG) KIR4.1 expressed in oligodendrocytes, the putative target antigen of autoantibodies. The aim of this study is to verify the presence of KIR4.1 antibodies in MS patients, by independently replicating the originally-described procedure...
March 11, 2017: Journal of Immunological Methods
https://www.readbyqxmd.com/read/28291734/safety-assessment-of-the-aqueous-extract-of-the-flowers-of-nymphaea-lotus-linn-nymphaeaceae-acute-neuro-and-subchronic-oral-toxicity-studies-in-albinos-wistar-rats
#14
Mireille Kameni Poumeni, Danielle Claude Bilanda, Paul Désiré Dzeufiet Djomeni, Yolande Sandrine Mengue Ngadena, Marguerite Francine Mballa, Madeleine Chantal Ngoungoure, Agnès Carolle Ouafo, Théophile Dimo, Pierre Kamtchouing
BACKGROUND: Nymphaea lotus Linn (N. lotus) is a medicinal plant widely used in Cameroon popular medicine, to treat neuropsychiatric conditions, male sexual disorders or as food supplement. However, scientific data on the pharmacotoxic profile of this plant are not available. The safety of N. lotus was assessed in acute, neuro- and subchronic toxicity studies by following the OECD guidelines. Effectively, no data have been published until now in regard to its safety on the nervous system...
March 14, 2017: Journal of Complementary & Integrative Medicine
https://www.readbyqxmd.com/read/28285988/essential-parameters-and-risk-factors-of-the-patients-for-diabetes-care-and-treatment
#15
Abdulbari Bener, Fatma Ela Keskin, Eda M Kurtulus, Mustafa Guzel, Elif I Çekirdekçi, Pınar Kadıoğlu, Dildar Konukoğlu, Mustafa Öztürk
AIM: The aim was to explore the association between Type 2 Diabetes Mellitus [T2DM] treatment satisfactions of patients regarding their socio-economic, life-style, history medication and clinical outcome in a Turkish population SUBJECT AND METHODS: A cross-sectional study conducted from February 2016 to September 2016. Of the total 1500 diabetic patients approached, 1094 (72.9%) gave their consent. Data analysis included, sociodemographic, serum lipid profiles (LDL, HDL), calcium, uric acid, blood pressure and glycated hemoglobin (HbA1c) at baseline and after six months...
March 6, 2017: Diabetes & Metabolic Syndrome
https://www.readbyqxmd.com/read/28282231/safety-of-benazepril-in-400-azotemic-and-110-non-azotemic-client-owned-cats-2001-2012
#16
Jennifer O Lavallee, Gary D Norsworthy, Carla L Huston, Dennis J Chew
This retrospective study examined cats after initiation of benazepril therapy to determine the frequency of systemic hypotension or elevations in serum creatinine and/or potassium. Medical records review identified azotemic and non-azotemic cats prescribed benazepril. Blood pressure was recorded at the first available time after initiation of therapy. No cats experienced documented systolic systemic hypotension (<90 mmHg). Serum creatinine, and potassium when available, were recorded at baseline and in time windows after initiation of treatment: 1-30 days and 31-60 days...
March 2017: Journal of the American Animal Hospital Association
https://www.readbyqxmd.com/read/28274411/alternative-natural-seasoning-to-improve-the-microbial-stability-of-low-salt-beef-patties
#17
Javier García-Lomillo, M A Luisa González-SanJosé, Raquel Del Pino-García, M A Dolores Rivero-Pérez, Pilar Muñiz-Rodríguez
The meat industry is seeking new strategies to reduce the sodium content of meat products without shortening their shelf-life. Natural seasonings as salt alternatives are more appreciated than chemical preservatives and also enable the incorporation of interesting nutrients. The present work studies the potential of a new red wine pomace seasoning (RWPS), derived from wine pomace, to inhibit spoilage growth in beef patties with different salt levels (2%, 1.5% and 1%) held in storage at 4°C. The use of RWPS (2% w/w) improved the microbial stability of the patties, delaying total aerobic mesophilic, and lactic acid bacteria growth, especially in samples with low salt levels...
July 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28273898/disinfection-of-multidrug-resistant-escherichia-coli-by-solar-photocatalysis-using-fe-doped-zno-nanoparticles
#18
Sourav Das, Sayantan Sinha, Bhaskar Das, R Jayabalan, Mrutyunjay Suar, Amrita Mishra, Ashok J Tamhankar, Cecilia Stålsby Lundborg, Suraj K Tripathy
Spread of antibiotic resistant bacteria through water, is a threat to global public health. Here, we report Fe-doped ZnO nanoparticles (Fe/ZnO NPs) based solar-photocatalytic disinfection (PCD) of multidrug resistant Escherichia coli (MDR E. coli). Fe/ZnO NPs were synthesized by chemical precipitation technique, and when used as photocatalyst for disinfection, proved to be more effective (time for complete disinfection = 90 min) than ZnO (150 min) and TiO2 (180 min). Lipid peroxidation and potassium (K(+)) ion leakage studies indicated compromisation of bacterial cell membrane and electron microscopy and live-dead staining confirmed the detrimental effects on membrane integrity...
December 2017: Scientific Reports
https://www.readbyqxmd.com/read/28273599/radiocesium-in-migratory-aquatic-game-birds-using-contaminated-u-s-department-of-energy-reactor-cooling-reservoirs-a-long-term-perspective
#19
Robert A Kennamer, Ricki E Oldenkamp, James C Leaphart, Joshua D King, A Lawrence Bryan, James C Beasley
Low-level releases of radiocesium into former nuclear reactor cooling-reservoirs on the U.S. Department of Energy's Savannah River Site (SRS) in South Carolina, USA, dating primarily to the late 1950s and early 1960s, have allowed examination of long-term contaminant attenuation in biota occupying these habitats. Periodic collections of migratory game birds since the 1970s have documented (137)Cs (radiocesium) activity concentrations in birds of SRS reservoirs, including mainly Par Pond and Pond B. In this study, during 2014 and 2015 we released wild-caught American coots (Fulica americana) and ring-necked ducks (Aythya collaris) onto Pond B...
March 5, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28270819/effects-of-low-ph-on-photosynthesis-related-physiological-parameters-and-nutrient-profiles-of-citrus
#20
An Long, Jiang Zhang, Lin-Tong Yang, Xin Ye, Ning-Wei Lai, Ling-Ling Tan, Dan Lin, Li-Song Chen
Seedlings of "Xuegan" (Citrus sinensis) and "Sour pummelo" (Citrus grandis) were irrigated daily with a nutrient solution at a pH of 2.5, 3, 4, 5, or 6 for 9 months. Thereafter, the following responses were investigated: seedling growth; root, stem, and leaf concentrations of nutrient elements; leaf gas exchange, pigment concentration, ribulose-1,5-bisphosphate carboxylase/oxygenase activity and chlorophyll a fluorescence; relative water content, total soluble protein level, H2O2 production and electrolyte leakage in roots and leaves...
2017: Frontiers in Plant Science
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