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https://www.readbyqxmd.com/read/29146345/effect-of-high-pressure-processing-on-colour-phytochemical-contents-and-antioxidant-activities-of-purple-waxy-corn-zea-mays-l-var-ceratina-kernels
#1
Kawinchaya Saikaew, Kamol Lertrat, Mutita Meenune, Ratchada Tangwongchai
High-pressure processing (HPP) at 250-700 MPa for 30-45 min affects the colour parameters, phytochemical contents and antioxidant activities of purple waxy corn kernels (p < 0.05). The higher pressure-level, the lower L(∗), a(∗), b(∗), C(∗) and h(o) (p < 0.05). However, pressure-treated kernels at 700 MPa showed a similar colour profile to steam-treated kernels. HPP caused a loss in the total phenolic, flavonoid, and anthocyanin contents and antioxidant activities. The pressure-treated kernels had a higher phytochemical content than the steam-treated kernels...
March 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29121067/high-yields-of-hydrogen-production-from-methanol-steam-reforming-with-a-cross-u-type-reactor
#2
Shubin Zhang, Yufeng Zhang, Junyu Chen, Xuelin Zhang, Xiaowei Liu
This paper presents a numerical and experimental study on the performance of a methanol steam reformer integrated with a hydrogen/air combustion reactor for hydrogen production. A CFD-based 3D model with mass and momentum transport and temperature characteristics is established. The simulation results show that better performance is achieved in the cross-U type reactor compared to either a tubular reactor or a parallel-U type reactor because of more effective heat transfer characteristics. Furthermore, Cu-based micro reformers of both cross-U and parallel-U type reactors are designed, fabricated and tested for experimental validation...
2017: PloS One
https://www.readbyqxmd.com/read/29100872/bioaccesibility-of-cylindrospermopsin-from-cooked-fish-muscle-after-the-application-of-an-in-vitro-digestion-model-and-its-bioavailability
#3
Sara Maisanaba, Federica Saladino, Guillermina Font, Ángeles Jos, Ana M Cameán, Giuseppe Meca
Humans can be exposed to cyanotoxins through the ingestion of contaminated water, food or beverages. In the present work, the bioaccesibility of Cylindrospermopsin (CYN), one of the most relevant cyanotoxins, was evaluated in a pure CYN solution and cooked CYN-contaminated fish muscles (20 μg/mL). An in vitro digestion model including the salivar, gastric, duodenal and colonic phases was performed, being each fraction analyzed by HPLC-MS-MS to evaluate CYN degradation. Moreover, Caco-2/TC7 cells were exposed to the digested duodenal and colonic phases to elucidate the final bioavailability of CYN in an approximation to the real human exposure scenario...
October 31, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/29082481/physical-pretreatment-methods-for-improving-microalgae-anaerobic-biodegradability
#4
Olivia Córdova, Fabiana Passos, Rolando Chamy
Microalgae may be a potential feedstock for biogas production through anaerobic digestion. However, this process is limited by the hydrolytic stage, due to the complex and resistant microalgae cell wall components. This fact hinders biomass conversion into biogas, demanding the application of pretreatment techniques for inducing cell damage and/or lysis and organic matter solubilisation. In this study, sonication, thermal, ultrasound, homogeneizer, hydrothermal and steam explosion pretreatments were evaluated in different conditions for comparing their effects on anaerobic digestion performance in batch reactors...
October 30, 2017: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/29067006/a-multispecies-fungal-biofilm-approach-to-enhance-the-celluloyltic-efficiency-of-membrane-reactors-for-consolidated-bioprocessing-of-plant-biomass
#5
Charilaos Xiros, Michael H Studer
The constraints and advantages in cellulolytic enzymes production by fungal biofilms for a consolidated bioconversion process were investigated during this study. The biofilm cultivations were carried out in reactors designed for consolidated bioprocessing Multispecies Biofilm Membrane reactors, (MBM) where an aerobic fungal biofilm produces the lignocellulolytic enzymes while a fermenting microorganism forms the fermentation product at anaerobic conditions. It was shown that although mycelial growth was limited in the MBM reactors compared to submerged cultivations, the secretion of cellulolytic enzymes per cell dry weight was higher...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28954188/detailed-analysis-of-wheat-straw-node-and-internode-for-their-prospective-efficient-utilization
#6
Seyed Hamidreza Ghaffar, Mizi Fan, Yonghui Zhou, Omar Abo Madyan
In order to efficiently utilize wheat straw, the systematic examination of their cell wall components, chemical structures, morphology, and relation to the physicochemical and mechanical properties is necessary. Detailing of node and internode signifies their different features and characteristics which can ultimately lead to their separated processing for enhanced efficiency and higher value-added biorefinery. In this study, distinct variations were found among characteristics of node and internode, inner and outer surface...
October 5, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28930249/anti-inflammatory-antioxidant-antibiotic-and-cytotoxic-activities-of-tanacetum-vulgare-l-essential-oil-and-its-constituents
#7
Héloïse Coté, Marie-Anne Boucher, André Pichette, Jean Legault
Background:Tanacetum vulgare L. (Asteraceae) is a perennial herb that has been used to treat multiple ailments. Regional variability of the chemical composition of T. vulgare essential oils is well-known. Despite these regional chemotypes, most relevant studies did not analyze the complete chemical composition of the T. vulgare essential oil and its constituents in relation to their biological activities. Here, we assess the anti-inflammatory, antioxidant, antibacterial, and cytotoxic activities of T. vulgare collected from northern Quebec (Saguenay-Lac-St-Jean), Canada...
May 25, 2017: Medicines (Basel, Switzerland)
https://www.readbyqxmd.com/read/28919926/sustaining-fermentation-in-high-gravity-ethanol-production-by-feeding-yeast-to-a-temperature-profiled-multifeed-simultaneous-saccharification-and-co-fermentation-of-wheat-straw
#8
Johan O Westman, Ruifei Wang, Vera Novy, Carl Johan Franzén
BACKGROUND: Considerable progress is being made in ethanol production from lignocellulosic feedstocks by fermentation, but negative effects of inhibitors on fermenting microorganisms are still challenging. Feeding preadapted cells has shown positive effects by sustaining fermentation in high-gravity simultaneous saccharification and co-fermentation (SSCF). Loss of cell viability has been reported in several SSCF studies on different substrates and seems to be the main reason for the declining ethanol production toward the end of the process...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28919336/staphylococcus-aureus-dry-surface-biofilms-are-more-resistant-to-heat-treatment-than-traditional-hydrated-biofilms
#9
A Almatroudi, S Tahir, H Hu, D Chowdhury, I B Gosbell, S O Jensen, G S Whiteley, A K Deva, T Glasbey, K Vickery
BACKGROUND: The importance of biofilms to clinical practice is being increasingly realised. Biofilm tolerance to antibiotics is well described but limited work has been conducted on the efficacy of heat disinfection and sterilization against biofilms. AIM: To test the susceptibility of planktonic, hydrated biofilm and dry-surface biofilm forms of Staphylococcus aureus, to dry heat and wet heat treatments. METHODS: S. aureus was grown as both hydrated biofilm and dry-surface biofilm in the CDC biofilm generator...
September 14, 2017: Journal of Hospital Infection
https://www.readbyqxmd.com/read/28906501/impact-of-cleaning-procedures-on-adhesion-of-living-cells-to-three-abutment-materials
#10
Christian Mehl, Matthias Kern, Anna Zimmermann, Sönke Harder, Steven Huth, Christine Selhuber-Unkel
PURPOSE: To test the adhesion properties of live gingival fibroblasts to three different implant abutment materials after five different cleaning procedures. MATERIALS AND METHODS: Highly polished discs of lithium disilicate (LS), zirconium dioxide (Zr), and titanium alloy (Ti) were fabricated. The specimens were cleaned by one of five different methods: steam (S), argon plasma (AP), ultrasound and disinfection (UD), ultrasound and sterilization in an autoclave (UA), or photofunctionalization with high-intensity ultraviolet light (PF)...
September 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28875170/photoinduced-nanobubble-driven-superfast-diffusion-of-nanoparticles-imaged-by-4d-electron-microscopy
#11
Xuewen Fu, Bin Chen, Jau Tang, Ahmed H Zewail
Dynamics of active or propulsive Brownian particles in nonequilibrium status have recently attracted great interest in many fields including artificial micro/nanoscopic motors and biological entities. Understanding of their dynamics can provide insight into the statistical properties of physical and biological systems far from equilibrium. We report the translational dynamics of photon-activated gold nanoparticles (NPs) in water imaged by liquid-cell four-dimensional electron microscopy (4D-EM) with high spatiotemporal resolution...
August 2017: Science Advances
https://www.readbyqxmd.com/read/28852423/single-cell-oil-production-by-trichosporon-cutaneum-from-steam-exploded-corn-stover-and-its-upgradation-for-production-of-long-chain-%C3%AE-%C3%AF-dicarboxylic-acids
#12
Chen Zhao, Hao Fang, Shaolin Chen
BACKGROUND: Single cell oil (SCO) production from lignocelluloses by oleaginous microorganisms is still high in production cost, making the subsequent production of biofuels inviable economically in such an era of low oil prices. Therefore, how to upgrade the final products of lignocellulose-based bioprocess to more valuable ones is becoming a more and more important issue. RESULTS: Differently sourced cellulases were compared in the enzymatic hydrolysis of the steam-exploded corn stover (SECS) and the cellulase from the mixed culture of Trichoderma reesei and Aspergillus niger was found to have the highest enzymatic hydrolysis yield 86...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28758425/new-triterpenoid-saponins-from-the-steaming-treated-roots-of-panax-notoginseng
#13
Cheng-Zhen Gu, Yi-Jun Qiao, Dong Wang, Hong-Tao Zhu, Chong-Ren Yang, Min Xu, Ying-Jun Zhang
Further phytochemical investigation of the steaming treated roots of Panax notoginseng (Araliaceae) led to the identification of two new dammarane-type triterpenoid saponins, notoginsenoside SP20 (1) and SP21 (2). In addition, a pair of new phenolic glycosides (3a and 3b) was also isolated together with two known compounds. Their structures were elucidated by HRESIMS, 1D- and 2D-NMR spectra. Compounds 1 and 2 showed no in vitro cytotoxicity against five human cancer cell lines (HL-60, SMMC-7712, A-549, MCF-9 and SW480)...
July 31, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28702081/limitation-of-cellulose-accessibility-and-unproductive-binding-of-cellulases-by-pretreated-sugarcane-bagasse-lignin
#14
Germano Siqueira, Valdeir Arantes, Jack N Saddler, André Ferraz, Adriane M F Milagres
BACKGROUND: The effectiveness of the enzymatic hydrolysis of cellulose in plant cell wall is strongly influenced by the access of enzymes to cellulose, which is at least in part limited by the presence of lignin. Although physicochemical treatments preceding the enzymatic catalysis significantly overcome this recalcitrance, the residual lignin can still play a role in the process. Lignin is suggested to act as a barrier, hindering cellulose and limiting the access of the enzymes. It can also unspecifically bind cellulases, reducing the amount of enzymes available to act on cellulose...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28701863/inhibition-of-hypoxia-induced-cyclooxygenase-2-by-korean-red-ginseng-is-dependent-on-peroxisome-proliferator-activated-receptor%C3%A2-gamma
#15
Heewon Song, Young Joo Lee
BACKGROUND: Korean Red Ginseng (KRG) is a traditional herbal medicine made by steaming and drying fresh ginseng. It strengthens the endocrine and immune systems to ameliorate various inflammatory responses. The cyclooxygenase-2 (COX-2)/prostaglandin E2 pathway has important implications for inflammation responses and tumorigenesis. Peroxisome proliferator-activated receptor gamma (PPARγ) is a transcription factor that regulates not only adipogenesis and lipid homeostasis, but also angiogenesis and inflammatory responses...
July 2017: Journal of Ginseng Research
https://www.readbyqxmd.com/read/28665981/ha117-endows-hl60-cells-with-a-stem-like-signature-by-inhibiting-the-degradation-of-dnmt1-via-its-ability-to-down-regulate-expression-of-the-ggl-domain-of-rgs6
#16
Shuangshuang Li, Xianqing Jin, Huan Wu, Yi Wang, Xiaoqing Li, Yuxia Guo, Shaoyan Liang
All-trans retinoic acid (ATRA) induces complete remission in almost all patients with acute promyelocytic leukemia (APL) via its ability to induce the in vivo differentiation of APL blasts. However, prolonged ATRA treatment can result in drug resistance. In previous studies, we generated a multi-drug-resistant HL60/ATRA cell line and found it to contain a new drug resistance-related gene segment, HA117. In this study, we demonstrate that ATRA induces multi-drug-resistant subpopulations of HL60 cells with a putative stem-like signature by up-regulating the expression of the new gene segment HA117...
2017: PloS One
https://www.readbyqxmd.com/read/28611790/saccharification-performances-of-miscanthus-at-the-pilot-and-miniaturized-assay-scales-genotype-and-year-variabilities-according-to-the-biomass-composition
#17
Nassim Belmokhtar, Stéphanie Arnoult, Brigitte Chabbert, Jean-Paul Charpentier, Maryse Brancourt-Hulmel
HIGHLIGHTS Biomass production and cell wall composition are differentially impacted by harvesting year and genotypes, influencing then cellulose conversion in miniaturized assay.Using a high-throughput miniaturized and semi-automated method for performing the pretreatment and saccharification steps at laboratory scale allows for the assessment of these factors on the biomass potential for producing bioethanol before moving to the industrial scale. The large genetic diversity of the perennial grass miscanthus makes it suitable for producing cellulosic ethanol in biorefineries...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28552597/vasodilation-effect-of-volatile-oil-from-allium-macrostemon-bunge-are-mediated-by-pka-no-pathway-and-its-constituent-dimethyl-disulfide-in-isolated-rat-pulmonary-arterials
#18
Chenghua Han, Jing Qi, Sainan Gao, Chunxiang Li, Ying Ma, Jing Wang, Yuhua Bai, Xiaodong Zheng
The present study aimed to investigate the vasodilation effects of Allium macrostemon Bunge (AMB) on isolated rat pulmonary arterials (PAs) and to assess the underling mechanisms. The volatile oil was extracted by steam distillation from the bulbs of AMB. Then the volatile oil from AMB was studied on isolated rat PA, removal of endothelium, or pretreatment with nitro oxide (NO) synthase (NOS) inhibitor NG-nitro-L-arginine methyl ester (L-NAME), or with protein kinase A (PKA) inhibitor PKI but not cyclooxygenase inhibitor indomethacin significantly blocked the AMB induced relaxation on PE-contracted PA rings...
July 2017: Fitoterapia
https://www.readbyqxmd.com/read/28527765/lignocellulosic-sugar-management-for-xylitol-and-ethanol-fermentation-with-multiple-cell-recycling-by-kluyveromyces-marxianus-iipe453
#19
Diptarka Dasgupta, Debashish Ghosh, Sheetal Bandhu, Dilip K Adhikari
Optimum utilization of fermentable sugars from lignocellulosic biomass to deliver multiple products under biorefinery concept has been reported in this work. Alcohol fermentation has been carried out with multiple cell recycling of Kluyveromyces marxianus IIPE453. The yeast utilized xylose-rich fraction from acid and steam treated biomass for cell generation and xylitol production with an average yield of 0.315±0.01g/g while the entire glucose rich saccharified fraction had been fermented to ethanol with high productivity of 0...
July 2017: Microbiological Research
https://www.readbyqxmd.com/read/28523905/highly-conductive-porous-transition-metal-dichalcogenides-via-water-steam-etching-for-high-performance-lithium-sulfur-batteries
#20
Zhubing Xiao, Zhi Yang, Liujiang Zhou, Linjie Zhang, Ruihu Wang
Lithium-sulfur (Li-S) batteries show significant advantages for next-generation energy storage systems owing to their high energy density and cost effectiveness. The main challenge in the development of long-life and high-performance Li-S batteries is to simultaneously facilitate the redox kinetics of sulfur species and suppress the shuttle effect of polysulfides. In this contribution, we present a general and green water-steam-etched approach for the fabrication of H- and O-incorporated porous TiS2 (HOPT)...
June 7, 2017: ACS Applied Materials & Interfaces
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