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https://www.readbyqxmd.com/read/27919545/the-effects-of-pre-aeration-and-inoculation-on-solid-state-anaerobic-digestion-of-rice-straw
#1
Ying Zhou, Chao Li, Ivo Achu Nges, Jing Liu
Pre-aeration was investigated for enhancing biodegradation of recalcitrant lignocellulosic structure of rice straw under various low temperatures regimes (25, 35 and 45°C) and aeration durations (0, 2, 4, 6 and 8days). It was demonstrated aerated rice straw for 2days at 35°C resulted in highest hydrolytic efficiency and biochemical methane potential (BMP) (355.3±18.7mlCH4/gVS). Furthermore, both methane yields and initiation speeds of the solid-state anaerobic digestion (SS-AD) were inversely proportional to substrate-to-inoculum ratios due to the accumulation of volatile fatty acids (VFAs) and poor mass transfer...
November 29, 2016: Bioresource Technology
https://www.readbyqxmd.com/read/27918737/influence-of-bethanechol-on-salivary-parameters-in-irradiated-patients
#2
C Carrara-Cotomacio, L Campos, A Simões, G Chagas-Jaguar, E-M Crosato, F Abreu-Alves
BACKGROUND: Some studies have shown evidence that the prophylactic use of bethanechol chloride (BC) may be useful in preventing the incidence and/or severity of xerostomia (XT). However, the indication of BC in irradiated patients with XT needs to be better characterized. The study aimed to evaluate the influence of BC on XT, salivary flow rate, and salivary composition in patients previously submitted to head and neck radiotherapy. MATERIAL AND METHODS: Forty five irradiated patients complaining of XT used 50 mg/day of BC for 3 months, and the salivary parameters were evaluated in 4 Phases (Before BC therapy, after one month of BC, 2 months of BC, and 3 months of BC)...
December 6, 2016: Medicina Oral, Patología Oral y Cirugía Bucal
https://www.readbyqxmd.com/read/27912137/a-novel-continuous-two-phase-partitioning-bioreactor-operated-with-polymeric-tubing-performance-validation-for-enhanced-biological-removal-of-toxic-substrates
#3
M Concetta Tomei, Domenica Mosca Angelucci, Andrew J Daugulis
A continuous two-phase partitioning bioreactor (C-TPPB), operated with coiled tubing made of the DuPont polymer Hytrel 8206, was tested for the bioremediation of 4-chlorophenol, as a model toxic compound. The tubing was immersed in the aqueous phase, with the contaminated water flowing tube-side, and an adapted microbial culture suspended in the bioreactor itself, with the metabolic demand of the cells creating a concentration gradient to cause the substrate to diffuse into the bioreactor for biodegradation...
November 29, 2016: Journal of Environmental Management
https://www.readbyqxmd.com/read/27908267/development-of-poly-lactide-co-glicolide-nanoparticles-incorporating-morphine-hydrochloride-to-prolong-its-circulation-in-blood
#4
Victoria Gómez-Murcia, Mercedes García Montalbán, Juan Carmelo Gómez-Fernández, Pilar Almela
Formulations incorporating nanoparticles (NPs) are widely used to prolong drug release. In this regard, poly(lactide-co-glicolide) (PLGA) is often used in their preparation due to its high degree of biocompatibility and biodegradability. In the present study, morphine HCl is incorporated in PLGA-NPs and different preparation alternatives are evaluated for their effects on the properties, stability and capacity of encapsulation. NPs were prepared by a double emulsion solvent diffusion-ammonium loading (DESD-AL) or double emulsion solvent diffusion-traditional (DESD-T) technique...
December 1, 2016: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/27907253/decadal-shifts-in-grass-and-woody-plant-cover-are-driven-by-prolonged-drying-and-modified-by-topo-edaphic-properties
#5
Seth M Munson, Temuulen T Sankey, George Xian, Miguel L Villarreal, Collin G Homer
Woody plant encroachment and overall declines in perennial vegetation in dryland regions can alter ecosystem properties and indicate land degradation, but the causes of these shifts remain controversial. Determining how changes in the abundance and distribution of grass and woody plants are influenced by conditions that regulate water availability at a regional scale provides a baseline to compare how management actions alter the composition of these vegetation types at a more local scale and can be used to predict future shifts under climate change...
December 2016: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/27905555/the-complex-nature-of-calcium-cation-interactions-with-phospholipid-bilayers
#6
Adéla Melcrová, Sarka Pokorna, Saranya Pullanchery, Miriam Kohagen, Piotr Jurkiewicz, Martin Hof, Pavel Jungwirth, Paul S Cremer, Lukasz Cwiklik
Understanding interactions of calcium with lipid membranes at the molecular level is of great importance in light of their involvement in calcium signaling, association of proteins with cellular membranes, and membrane fusion. We quantify these interactions in detail by employing a combination of spectroscopic methods with atomistic molecular dynamics simulations. Namely, time-resolved fluorescent spectroscopy of lipid vesicles and vibrational sum frequency spectroscopy of lipid monolayers are used to characterize local binding sites of calcium in zwitterionic and anionic model lipid assemblies, while dynamic light scattering and zeta potential measurements are employed for macroscopic characterization of lipid vesicles in calcium-containing environments...
December 1, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27894842/energetic-basis-on-interactions-between-ferredoxin-and-ferredoxin-nadp-reductase-at-varying-physiological-conditions
#7
Misaki Kinoshita, Ju Yaen Kim, Satoshi Kume, Yuxi Lin, K Hun Mok, Yosky Kataoka, Koichiro Ishimori, Natalia Markova, Genji Kurisu, Toshiharu Hase, Young-Ho Lee
In spite of a number of studies to characterize ferredoxin (Fd):ferredoxin NADP(+) reductase (FNR) interactions at limited conditions, detailed energetic investigation on how these proteins interact under near physiological conditions and its linkage to FNR activity are still lacking. We herein performed systematic Fd:FNR binding thermodynamics using isothermal titration calorimetry (ITC) at distinct pH (6.0 and 8.0), NaCl concentrations (0-200 mM), and temperatures (19-28 °C) for mimicking physiological conditions in chloroplasts...
November 25, 2016: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27891471/comparison-of-gingival-health-and-salivary-parameters-among-autistic-and-non-autistic-school-children-in-riyadh
#8
Hafez M Diab, Suha Saeed Motlaq, Amal Alsharare, Ashwaq Alshammery, Nadia Alshammery, Shabnam Gulzar Khawja, Altaf H Shah
INTRODUCTION: Autism is a neuro-developmental disorder which is manifested as impairment of social interaction, communication and a repetitive behaviour. Autism can obscure dental treatment for the affected patients; furthermore, children with autism commonly have destructive oral habits. AIM: The aims of this study were to evaluate the Modified Gingival Index (MGI), Plaque Index (PI), salivary pH and buffering capacity of the saliva among autistic children compared to normal children in Riyadh City that may provide baseline data to enable comparison and future planning of dental services for autistic children...
October 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27890571/facile-fabrication-of-poly-acrylic-acid-coated-chitosan-nanoparticles-with-improved-stability-in-biological-environments
#9
Yukun Wu, Jing Wu, Jing Cao, Yajie Zhang, Zhe Xu, Xiuyi Qin, Wei Wang, Zhi Yuan
Chitosan is one of the most important and commonly used natural polysaccharides in drug delivery for its biocompatible and biodegradable properties. However, poor blood circulation of the chitosan nanoparticles due to their cationic nature is one of the major bottlenecks of chitosan-based drug delivery systems. To address this problem, a versatile platform based on poly(acrylic acid) (PAA) coated ionically cross-linked chitosan/tripolyphosphate nanoparticles (CTS/TPP-PAA NPs), is reported. The zeta potentials of CTS/TPP and CTS/TPP-PAA NPs are approximately 33 mV and -25 mV, respectively...
November 23, 2016: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/27884323/the-toll-like-receptor-4-antagonist-transforming-growth-factor-%C3%AE-activated-kinase-tak-242-attenuates-taurocholate-induced-oxidative-stress-through-regulating-mitochondrial-function-in-mice-pancreatic-acinar-cells
#10
Long-Fei Pan, Lei Yu, Li-Ming Wang, Jun-Tao He, Jiang-Li Sun, Xiao-Bo Wang, Zheng-Hai Bai, Li-Juan Su, Hong-Hong Pei
BACKGROUND: Acute pancreatitis (AP) is a commonly occurring and potentially life-threatening disease. Recently, toll-like receptor 4 (TLR4) has been considered as a new clue for studying the pathogenesis of AP due to its important role in inflammatory response cascade. MATERIALS AND METHODS: The aim of this study was to investigate the potential protective effect of transforming growth factor-β-activated kinase (TAK)-242, a novel TLR4 antagonist, in taurocholate-treated mice pancreatic acinar cells...
December 2016: Journal of Surgical Research
https://www.readbyqxmd.com/read/27882611/chronic-lactate-supplementation-does-not-improve-blood-buffering-capacity-and-repeated-high-intensity-exercise
#11
L F Oliveira, V de Salles Painelli, K Nemezio, L S Gonçalves, G Yamaguchi, B Saunders, B Gualano, G G Artioli
Since there is conflicting data on the buffering and ergogenic properties of calcium lactate (CL), we investigated the effect of chronic CL supplementation on blood pH, bicarbonate, and high-intensity intermittent exercise performance. Sodium bicarbonate (SB) was used as a positive control. Eighteen athletes participated in this double-blind, placebo-controlled, crossover, fully counterbalanced study. All participants underwent three different treatments: placebo (PL), CL, and SB. The dose was identical in all conditions: 500 mg/kg BM divided into four daily individual doses of 125 mg/kg BM, for five consecutive days, followed by a 2-7-day washout period...
November 23, 2016: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/27875766/augmentation-of-bacterial-homeostasis-by-regulating-in-situ-buffer-capacity-significance-of-total-dissolved-salts-over-acidogenic-metabolism
#12
S Venkata Mohan, S Srikanth, G N Nikhil
During anaerobic fermentation, consequent accumulation of acidic fermented products leads to the failure of pH homeostasis. The present study aimed to comprehend the changes in buffering capacity with addition of sodium salts of hydroxide, bicarbonate and phosphate. The results showed notable augmentation in buffer capacity and cumulative hydrogen production (CHP) compared to control. The influential factor is the amount of undissociated volatile fatty acids released that affected the cell metabolism and consequently biohydrogen generation...
November 9, 2016: Bioresource Technology
https://www.readbyqxmd.com/read/27872706/alkyl-cross-linked-low-molecular-weight-polypropyleneimine-dendrimers-as-efficient-gene-delivery-vectors
#13
Faezeh Moghadam Ariaee, Maryam Hashemi, Sara Amel Farzad, Khalil Abnous, Mohammad Ramezani
OBJECTIVES: In recent years, polypropyleneimine (PPI) dendrimers have attracted great interest as non-viral gene delivery systems because of their attractive features including highly branched architecture with number of reactive end groups. However, without being structurally modified, they are not efficient gene carriers. In the present study, generation 2 and 3 (G2 and G3) of PPI dendrimers were conjugated with alkylcarboxylate groups as linker to enhance the transfection efficiency while maintaining their low cell toxicity...
October 2016: Iranian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/27865952/a-superporous-and-superabsorbent-glucuronoxylan-hydrogel-from-quince-cydonia-oblanga-stimuli-responsive-swelling-on-off-switching-and-drug-release
#14
Muhammad Umer Ashraf, Muhammad Ajaz Hussain, Gulzar Muhammad, Muhammad Tahir Haseeb, Sajid Bashir, Syed Zajif Hussain, Irshad Hussain
Current study was designed to investigate micromeritic properties, water absorption capacity, stimuli (pH, ethanol and saline) responsive swelling-deswelling (on-off switching) and controlled drug release from the polysaccharide glucuronoxylan isolated from the seeds of Quince. The water retention capacity of Quince hydrogel (QH) was found admirable. The hydrogel also exhibited privileged swelling in water and basic buffers (pH 6.8 and 7.4) while insignificant swelling in acidic buffer (pH 1.2). The swelling kinetics of QH follows second order...
November 16, 2016: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/27858795/effect-of-acetic-acid-in-recycling-water-on-ethanol-production-for-cassava-in-an-integrated-ethanol-methane-fermentation-process
#15
Xinchao Yang, Ke Wang, Jianhua Zhang, Lei Tang, Zhonggui Mao
Recently, the integrated ethanol-methane fermentation process has been studied to prevent wastewater pollution. However, when the anaerobic digestion reaction runs poorly, acetic acid will accumulate in the recycling water. In this paper, we studied the effect of low concentration of acetic acid (≤25 mM) on ethanol fermentation at different initial pH values (4.2, 5.2 or 6.2). At an initial pH of 4.2, ethanol yields increased by 3.0% and glycerol yields decreased by 33.6% as the acetic acid concentration was increased from 0 to 25 mM...
November 2016: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/27855323/food-insecurity-and-maternal-mental-health-in-le%C3%A3-n-nicaragua-potential-limitations-on-the-moderating-role-of-social-support
#16
Barbara A Piperata, Kammi K Schmeer, Andres Herrera Rodrigues, Virgilio Mariano Salazar Torres
Poor mental health among those living in poverty is a serious global public health concern. Food insecurity (FI) is recognized as an important, yet critically understudied social determinant of mental health. The relationship between FI and mothers' mental health in low- and middle-income countries (LMIC) is especially important to understand considering the high rates of poverty and associated FI in these settings. For these mothers, social support may serve as a buffer in ameliorating the impact of FI on mental distress...
December 2016: Social Science & Medicine
https://www.readbyqxmd.com/read/27854070/the-impact-of-swidden-decline-on-livelihoods-and-ecosystem-services-in-southeast-asia-a-review-of-the-evidence-from-1990-to-2015
#17
REVIEW
Wolfram H Dressler, David Wilson, Jessica Clendenning, Rob Cramb, Rodney Keenan, Sango Mahanty, Thilde Bech Bruun, Ole Mertz, Rodel D Lasco
Global economic change and policy interventions are driving transitions from long-fallow swidden (LFS) systems to alternative land uses in Southeast Asia's uplands. This study presents a systematic review of how these transitions impact upon livelihoods and ecosystem services in the region. Over 17 000 studies published between 1950 and 2015 were narrowed, based on relevance and quality, to 93 studies for further analysis. Our analysis of land-use transitions from swidden to intensified cropping systems showed several outcomes: more households had increased overall income, but these benefits came at significant cost such as reductions of customary practice, socio-economic wellbeing, livelihood options, and staple yields...
November 16, 2016: Ambio
https://www.readbyqxmd.com/read/27848996/development-and-characterization-of-lecithin-based-self-assembling-mixed-polymeric-micellar-sampms-drug-delivery-systems-for-curcumin
#18
Ling-Chun Chen, Yin-Chen Chen, Chia-Yu Su, Wan-Ping Wong, Ming-Thau Sheu, Hsiu-O Ho
Self-assembling mixed polymeric micelles (saMPMs) were developed for overcoming major obstacles of poor bioavailability (BA) associated with curcumin delivery. Lecithin added was functioned to enlarge the hydrophobic core of MPMs providing greater solubilization capacity. Amphiphilic polymers (sodium deoxycholate [NaDOC], TPGS, CREMOPHOR, or a PLURONIC series) were examined for potentially self-assembling to form MPMs (saMPMs) with the addition of lecithin. Particle size, size distribution, encapsulation efficacy (E...
November 16, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27848098/efficient-immobilization-of-age-and-nal-enzymes-onto-functional-amino-resin-as-recyclable-and-high-performance-biocatalyst
#19
Jian Cheng, Wei Zhuang, Chenglun Tang, Yong Chen, Jinglan Wu, Ting Guo, Hanjie Ying
N-Acetylglucosamine-2-epimerase (AGE) and N-acetylneuraminic acid lyase (NAL) were immobilized for synthesis of N-acetylneuraminic acid (Neu5Ac) on three resins: Amberzyme oxirane resin (AOR), poly (styrene-co-DVB)-Br resin (PBR) and amino resin (AR). The loading capacity and immobilized enzyme activity showed that AR was the best carrier. Three methods of glutaraldehyde cross-linking were tested and simultaneous cross-linking and immobilization was demonstrated to be the best method. The functional properties of immobilized AGE and NAL were studied and compared to those of the free enzyme...
November 15, 2016: Bioprocess and Biosystems Engineering
https://www.readbyqxmd.com/read/27847745/carbohydrate-electrolyte-drinks-exhibit-risks-for-human-enamel-surface-loss
#20
Mary Anne Sampaio de Melo, Vanara Florêncio Passos, Juliana Paiva Marques Lima, Sérgio Lima Santiago, Lidiany Karla Azevedo Rodrigues
OBJECTIVES: The aim of this investigation was to give insights into the impact of carbohydrate-electrolyte drinks on the likely capacity of enamel surface dissolution and the influence of human saliva exposure as a biological protective factor. MATERIALS AND METHODS: The pH, titratable acidity (TA) to pH 7.0, and buffer capacity (β) of common beverages ingested by patients under physical activity were analyzed. Then, we randomly distributed 50 specimens of human enamel into 5 groups...
November 2016: Restorative Dentistry & Endodontics
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