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https://www.readbyqxmd.com/read/28444591/biotechnological-application-of-sustainable-biogas-production-through-dry-anaerobic-digestion-of-napier-grass
#1
Natthawud Dussadee, Rameshprabu Ramaraj, Tapana Cheunbarn
Napier grass (Pennisetum purpureum), represents an interesting substrate for biogas production. The research project evaluated biogas potential production from dry anaerobic digestion of Napier grass using batch experiment. To enhance the biogas production from ensiled Napier grass, thermal and alkaline pre-treatments were performed in batch mode. Alkali hydrolysis of Napier grass was performed prior to batch dry anaerobic digestion at three different mild concentrations of sodium hydroxide (NaOH). The study results confirmed that NaOH pretreated sample produced high yield of biogas than untreated (raw) and hot water pretreated samples...
May 2017: 3 Biotech
https://www.readbyqxmd.com/read/28443904/na3v2-po4-3-nitrogen-sulfur-codoped-3d-porous-carbon-enabling-ultra-long-cycle-life-sodium-ion-batteries
#2
Yu Jiang, Haochuan Zhang, Hai Yang, Zhenyu Qi, Yan Yu
Na3V2(PO4)3 (NVP) is regarded as a promising cathode material for sodium ion batteries (NIBs) because of its 3D open structure suitable for Na insertion/extraction and high energy density. However, the NVP suffers from poor electrical conductivity, which restricts the rate performance and the long cycle performance of the NVP for NIBs. Here, the NVP particles embedded in the N,S co-doped 3D porous carbon matrix (denoted as NVP@3D-NSC) were prepared by a facile process. The NVP@3D-NSC can deliver high specific discharge capacities at high rates (54 mA h g(-1) at 80 C)...
April 26, 2017: Nanoscale
https://www.readbyqxmd.com/read/28443361/the-effect-of-alkali-on-the-product-distribution-from-black-liquor-conversion-under-supercritical-water
#3
Y Hawangchu, D Atong, V Sricharoenchaikul
Lignin in chemical pulping waste, or black liquor (BL), can be converted into various products via supercritical water gasification (SCWG). However, the inherited alkaline contents from the pulping chemicals may affect the product yields and properties. In this research, the influence of the residual alkali on the product distribution via SCWG of soda BL and kraft BL was evaluated. The SCWG was performed in a batch quartz reactor for 10 min at various temperatures (673, 773 and 873 K) and pressures (250, 300 and 400 bar)...
April 26, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28441537/determination-of-dihydralazine-based-on-chemiluminescence-resonance-energy-transfer-of-hollow-carbon-nanodots
#4
Suqin Han, Zheyan Fan, Xiaoxia Chen, Yunfang Wu, Jianbo Wang
The famous weak chemiluminescence (CL) system of potassium permanganate and sodium bisulfite (KMnO4-HSO3(-)) was enhanced by the hollow fluorescent carbon nanodots (HCNs). The investigation of mechanism revealed that the enhanced CL was induced by the excited-state HCNs (HCNs(⁎)), which could be produced from the electron-transfer annihilation of positively charged HCNs (HCNs(+)) and negatively charged HCNs (HCNs(-)) as well as by CL resonance energy transfer (CRET) from excited SO2 (SO2(⁎))/(1)O2 to HCNs...
April 20, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28440832/nanoemitters-and-innate-immunity-the-role-of-surfactants-and-bio-coronas-in-myeloperoxidase-catalyzed-oxidation-of-pristine-single-walled-carbon-nanotubes
#5
Cheuk Fai Chiu, Haider H Dar, Alexandr A Kapralov, Renã A S Robinson, Valerian E Kagan, Alexander Star
Single-walled carbon nanotubes (SWCNTs) are experimentally utilized in in vivo imaging and photothermal cancer therapy owing to their unique physicochemical and electronic properties. For these applications, pristine carbon nanotubes are often modified by polymer surfactant coatings to improve their biocompatibility, adding more complexity to their recognition and biodegradation by immuno-competent cells. Here, we investigate the oxidative degradation of SWCNTs catalyzed by neutrophil myeloperoxidase (MPO) using bandgap near-infrared (NIR) photoluminescence and Raman spectroscopy...
April 25, 2017: Nanoscale
https://www.readbyqxmd.com/read/28438490/acute-nanoparticle-exposure-to-vocal-folds-a-laboratory-study
#6
Xinxin Liu, Tanaya Walimbe, William Pierre Schrock, Wei Zheng, M Preeti Sivasankar
OBJECTIVES: Airway exposure to nanoparticles is common in occupational settings. Inhaled nanoparticles have toxic effects on respiratory tissue. Vocal folds are also at direct risk from inhaled nanoparticles. This study investigated the effects of single-walled carbon nanotubes (SWCNT), a type of nanoparticle, on vocal fold epithelium and fibroblasts. These cell types were selected for study as the epithelium is the outer layer of the vocal folds and fibroblasts are the most common cell type in connective tissue underlying the epithelium...
April 21, 2017: Journal of Voice: Official Journal of the Voice Foundation
https://www.readbyqxmd.com/read/28436051/a-novel-mass-spectrometry-based-method-for-simultaneous-determination-of-asymmetric-and-symmetric-dimethylarginine-l-arginine-and-l-citrulline-optimized-for-lc-ms-tof-and-lc-ms-ms
#7
Jerzy Wiśniewski, Mariusz G Fleszar, Joanna Piechowicz, Małgorzata Krzystek-Korpacka, Angelika Chachaj, Andrzej Szuba, Katarzyna Lorenc-Kukula, Leszek Masłowski, Wojciech Witkiewicz, Andrzej Gamian
Nitric oxide (NO) is a regulatory molecule involved in many biological processes. NO is produced by nitric oxide synthase by conversion of L-arginine to L-citrulline. L-arginine methylated derivatives, asymmetric and symmetric dimethylarginines (ADMA and SDMA), regulate L-arginine availability and the activity of nitric oxide synthase. As such, they have been frequently investigated as potential biomarkers in pathologies associated with dysfunctions in NO synthesis. Here, we present a new multistep analytical methodology based on liquid chromatography combined with mass spectrometry for the accurate identification of L-arginine, L-citrulline, ADMA, and SDMA...
April 24, 2017: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/28435779/sodium-ion-batteries-improving-the-rate-capability-of-3d-interconnected-carbon-nanofibers-thin-film-by-boron-nitrogen-dual-doping
#8
Min Wang, Yang Yang, Zhenzhong Yang, Lin Gu, Qianwang Chen, Yan Yu
Boron, nitrogen dual-doping 3D hard carbon nanofibers thin film is synthesized using a facile process. The nanofibers exhibit high specific capacity and remarkable high-rate capability due to the synergistic effect of 3D porous structure, large surface area, and enlarged carbon layer spacing, and the B, N codoping-induced defects.
April 2017: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/28434788/bicarbonate-based-cultivation-of-dunaliella-salina-for-enhancing-carbon-utilization-efficiency
#9
Ga-Yeong Kim, Jina Heo, Hee-Sik Kim, Jong-In Han
In this study, bicarbonate was proposed as an alternative carbon source to overcome exceedingly low CO2 fixation efficiency of conventional microalgae cultivation system. 5gL(-1) of sodium bicarbonate was found to well support the growth of Dunaliella salina, showing 2.84-fold higher specific growth rate than a bicarbonate-free control. This bicarbonate-fed cultivation also could yield biomass productivity similar to that of CO2-based system as long as pH was controlled. While the supplied CO2, because of its being a gas, was mostly lost and only 3...
April 7, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28430344/surfactant-assisted-synthesis-of-polyvinylpyrrolidone-hydroxyapatite-composites-as-a-bone-filler
#10
Masoumeh Meskinfam Langroudi, Masoud Giahi Saravani, Azita Nouri
BACKGROUND: Different methods have been used to prepare bone-like composites from inorganic nanoparticles embedded in polymeric matrixes to obtain the properties and structures required for bone fillers. METHODS: Bone-like nano-hydroxyapatite (nHA) was synthesized using a biomimetic method, with polyvinylpyrrolidone (PVP) as template and sodium dodecyl sulfate (SDS) as surfactant. RESULTS: The results demonstrated the formation of HA composites and showed that polymer and surfactant as the polymer capsule can be properly used to control the size, shape, morphology and dispersion of HA crystals...
April 11, 2017: Journal of Applied Biomaterials & Functional Materials
https://www.readbyqxmd.com/read/28429211/influence-of-humic-acids-extracted-from-peat-by-different-methods-on-functional-activity-of-macrophages-in-vitro
#11
E S Trofimova, M V Zykova, A A Ligacheva, E Y Sherstoboev, V V Zhdanov, M V Belousov, M S Yusubov, S V Krivoshchekov, M G Danilets, A M Dygai
We studied activation of macrophages with humic acids extracted from peat of large deposits in the Tomsk region by two extraction methods: by hydroxide or sodium pyrophosphate. Humic acid of lowland peat types containing large amounts of aromatic carbon, phenolic and alcohol groups, carbohydrate residues and ethers, irrespectively of the extraction methods contained LPS admixture that probably determines their activating properties. Humic acid of upland peat types characterized by high content of carbonyl, carboxyl, and ester groups enhance NO production and reduce arginase expression, but these effects were minimized when sodium hydroxide was used as an extraction solvent...
April 20, 2017: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28428757/circadian-rhythm-in-kidney-tissue-oxygenation-in-the-rat
#12
Tonja W Emans, Ben J Janssen, Jaap A Joles, C T Paul Krediet
Blood pressure, renal hemodynamics, electrolyte, and water excretion all display diurnal oscillation. Disturbance of these patterns is associated with hypertension and chronic kidney disease. Kidney oxygenation is dependent on oxygen delivery and consumption that in turn are determined by renal hemodynamics and metabolism. We hypothesized that kidney oxygenation also demonstrates 24-h periodicity. Telemetric oxygen-sensitive carbon paste electrodes were implanted in Sprague-Dawley rats (250-300 g), either in renal medulla (n = 9) or cortex (n = 7)...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28425668/pectin-hemicellulose-or-lignin-impact-of-the-biowaste-source-on-the-performance-of-hard-carbons-for-sodium-ion-batteries
#13
Xinwei Dou, Ivana Hasa, Maral Hekmatfar, Thomas Diemant, R Juergen Behm, Daniel Buchholz, Stefano Passerini
Hard carbons are currently the most widely used negative electrode materials in Na-ion batteries. This is due to their promising electrochemical performance with capacities of 200-300 mAh g-1 and stable long-term cycling. However, an abundant and cheap carbon source is necessary in order to comply with the low-cost philosophy of the Na-ion technology. As a matter of fact, many biologic or waste materials have been used to synthesize hard carbons but the impact of the precursors on the final properties of the anode material is not fully understood...
April 20, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28420466/-analysis-of-evaluation-indexes-for-prognosis-of-severe-burn-patients-with-sepsis
#14
Feng Zheng, Daming Wang, Ning Liu, Xiaonan Shao, Xinyuan Jin
OBJECTIVE: To compare changes in indexes and analyze their values in prognosis of severe burn patients with sepsis. METHODS: A retrospective analysis was conducted. The patients with severe burn sepsis admitted to the Third Affiliated Hospital of Soochow University from August 2014 to December 2016 were enrolled. The blood culture was positive in the clinical diagnosis of sepsis. According to the prognosis, the patients were divided into death group and survival group...
April 2017: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
https://www.readbyqxmd.com/read/28417974/the-e-coli-molecular-phenotype-under-different-growth-conditions
#15
Mehmet U Caglar, John R Houser, Craig S Barnhart, Daniel R Boutz, Sean M Carroll, Aurko Dasgupta, Walter F Lenoir, Bartram L Smith, Viswanadham Sridhara, Dariya K Sydykova, Drew Vander Wood, Christopher J Marx, Edward M Marcotte, Jeffrey E Barrick, Claus O Wilke
Modern systems biology requires extensive, carefully curated measurements of cellular components in response to different environmental conditions. While high-throughput methods have made transcriptomics and proteomics datasets widely accessible and relatively economical to generate, systematic measurements of both mRNA and protein abundances under a wide range of different conditions are still relatively rare. Here we present a detailed, genome-wide transcriptomics and proteomics dataset of E. coli grown under 34 different conditions...
April 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28417512/na2-ti3-o7-n-doped-carbon-hollow-spheres-for-sodium-ion-batteries-with-excellent-rate-performance
#16
Fangxi Xie, Lei Zhang, Dawei Su, Mietek Jaroniec, Shi-Zhang Qiao
Uniform Na2 Ti3 O7 hollow spheres assembled from N-doped carbon-coated ultrathin nanosheets are synthesized. A unique multilayer structure of nanosheets is presumed to significantly reduce energy consumption during the diffusion process of sodium ions, while the carbon-coated structure can increase the overall conductivity. The as-prepared sample used as an anode in sodium-ion batteries exhibits the best rate performance ever reported for Na2 Ti3 O7 , delivering more than 60 mAh g(-1) after 1000 continuous cycles at the high rate of 50 C, which was achieved due to its unique structure...
April 18, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28415500/sustained-release-of-simvastatin-from-hollow-carbonated-hydroxyapatite-microspheres-prepared-by-aspartic-acid-and-sodium-dodecyl-sulfate
#17
Ke Wang, Yinjing Wang, Xu Zhao, Yi Li, Tao Yang, Xue Zhang, Xiaoguang Wu
Hollow carbonated hydroxyapatite (HCHAp) microspheres as simvastatin (SV) sustained-release vehicles were fabricated through a novel and simple one-step biomimetic strategy. Firstly, hollow CaCO3 microspheres were precipitated through the reaction of CaCl2 with Na2CO3 in the presence of aspartic acid and sodium dodecyl sulfate. Then, the as-prepared hollow CaCO3 microspheres were transformed into HCHAp microspheres with a controlled anion-exchange method. The HCHAp microspheres were 3-5μm with a shell thickness of 0...
June 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28413084/brominated-dioxins-furans-and-hydroxylated-polybrominated-diphenyl-ethers-occurrences-in-commercial-1-2-bis-2-4-6-tribromophenoxy-ethane-btbpe-and-2-4-6-tribromophenol-and-formation-during-synthesis-of-btbpe
#18
Man Ren, Hao Zeng, Ping-An Peng, Hui-Ru Li, Cai-Ming Tang, Jian-Fang Hu
Polybrominated dibenzo-p-dioxins (PBDDs) and hydroxylated polybrominated diphenyl ethers (OH-PBDEs) can be formed from bromophenols (BPs) by thermal degradation, biosynthesis or phototransformation. However, it is unknown whether PBDDs and OH-PBDEs can be formed during the chemical production processes that utilize BPs as raw materials. 2,4,6-tribromophenol (2,4,6-TBP) is an important raw material for the synthesis of 1,2-bis(2,4,6-tribromophenoxy)ethane (BTBPE), a novel brominated flame retardant. In this study, PBDDs, polybrominated dibenzofurans (PBDFs) and OH-PBDEs have been identified and quantified in commercially available BTBPE and 2,4,6-TBP...
April 13, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28411538/formulation-of-crude-oil-spill-dispersants-based-on-the-hld-concept-and-using-a-lipopeptide-biosurfactant
#19
Witchaya Rongsayamanont, Suwat Soonglerdsongpha, Nichakorn Khondee, Onruthai Pinyakong, Chantra Tongcumpou, David A Sabatini, Ekawan Luepromchai
Solvent-free dispersants for crude oil spills were formulated based on the hydrophilic-lipophilic deviation (HLD) concept and using lipopeptides from Bacillus sp. GY19. The lipopeptides were recovered and concentrated from cell-free broth by foam fractionation and freeze-drying. They had good surface activity under varying temperatures, pH and NaCl levels. Moreover, the lipopeptides had low toxicity to copepods (LC50 1174mg/L) and whiteleg shrimp (LC50 1050mg/L). The characteristic curvature (Cc) of the lipopeptides showed that they were more hydrophobic (Cc 4...
April 4, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28411369/comparison-of-equine-platelet-function-and-survival-in-whole-blood-collected-in-acid-citrate-dextrose-solution-or-citrate-phosphate-dextrose-adenine-solution
#20
Rana Bozorgmanesh, Julie W Sutton-Burges, Fern Tablin
BACKGROUND: Equine whole blood collection and storage methods have been evaluated to assess red blood cell viability; however, platelet (PLT) viability has not been comprehensively assessed. OBJECTIVES: The purpose of the study was to compare viability of PLTs collected in whole blood into 2 different anticoagulants. METHODS: Whole blood from 6 healthy adult Thoroughbred horses was collected into citrate-phosphate-dextrose-adenine (CPDA) or acid-citrate-dextrose (ACD)...
April 14, 2017: Veterinary Clinical Pathology
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