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https://www.readbyqxmd.com/read/28649276/a-comparison-of-various-lignin-extraction-methods-to-enhance-the-accessibility-and-ease-of-enzymatic-hydrolysis-of-the-cellulosic-component-of-steam-pretreated-poplar
#1
Dong Tian, Richard P Chandra, Jin-Suk Lee, Canhui Lu, Jack N Saddler
BACKGROUND: Current single-stage delignification-pretreatment technologies to overcome lignocellulosic biomass recalcitrance are usually achieved at the expense of compromising the recovery of the polysaccharide components, particularly the hemicellulose fraction. One way to enhance overall sugar recovery is to tailor an efficient two-stage pretreatment that can pre-extract the more labile hemicellulose component before subjecting the cellulose-rich residual material to a second-stage delignification process...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28645263/microbiota-dependent-metabolite-and-cardiovascular-disease-marker-trimethylamine-n-oxide-tmao-is-associated-with-monocyte-activation-but-not-platelet-function-in-untreated-hiv-infection
#2
Judith M Haissman, Anna K Haugaard, Sisse R Ostrowski, Rolf K Berge, Johannes R Hov, Marius Trøseid, Susanne D Nielsen
BACKGROUND: HIV infection is associated with increased risk of cardiovascular disease beyond that explained by traditional risk factors. Altered gut microbiota, microbial translocation, and immune activation have been proposed as potential triggers. The microbiota-dependent metabolite trimethylamine-N-oxide (TMAO) predicts myocardial infarction (MI) in the general population and has recently been shown to induce platelet hyperreactivity. In the present study, we investigated if TMAO was associated with platelet function, microbial translocation, and immune activation in both untreated and combination anti-retroviral therapy (cART) HIV infection...
June 23, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28643085/exogenous-application-of-nitric-oxide-modulates-osmolyte-metabolism-antioxidants-enzymes-of-ascorbate-glutathione-cycle-and-promotes-growth-under-cadmium-stress-in-tomato
#3
Parvaiz Ahmad, Mohammed Abass Ahanger, Mohammed Nasser Alyemeni, Leonard Wijaya, Pravej Alam
Experiments were carried out to investigate the role of nitric oxide (NO) in ameliorating the negative effects of cadmium stress in tomato seedlings. Plants treated with cadmium (CdCl2, 150 μM) showed reduced growth, biomass yield, pigment content, chlorophyll fluorescence, and gas exchange parameters. Exogenous application of NO donor (sodium nitroprusside) with nutrient solution protected chlorophyll pigments, restored chlorophyll fluorescence and gas exchange parameters, and caused significant enhancements in growth and biomass yield...
June 22, 2017: Protoplasma
https://www.readbyqxmd.com/read/28630000/betaine-aldehyde-dehydrogenase-expression-during-physiological-cardiac-hypertrophy-induced-by-pregnancy
#4
Jesús Alfredo Rosas-Rodríguez, José Guadalupe Soñanez-Organis, José Arquimides Godoy-Lugo, Juan Alberto Espinoza-Salazar, Cesar Jeravy López-Jacobo, Norma Aurora Stephens-Camacho, Guadalupe González-Ochoa
Betaine Aldehyde Dehydrogenase (betaine aldehyde: NAD(P)(+) oxidoreductase, (E.C. 1.2.1.8; BADH) catalyze the irreversible oxidation of betaine aldehyde (BA) to glycine betaine (GB) and is essential for polyamine catabolism, γ-aminobutyric acid synthesis, and carnitine biosynthesis. GB is an important osmolyte that regulates the homocysteine levels, contributing to a vascular risk factor reduction. In this sense, distinct investigations describe the physiological roles of GB, but there is a lack of information about the GB novo synthesis process and regulation during cardiac hypertrophy induced by pregnancy...
June 16, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28629939/preparation-and-evaluation-of-400%C3%AE-m-i-d-polymer-based-hydrophilic-interaction-chromatography-monolithic-columns-with-high-column-efficiency
#5
Chusheng Liu, Haibin Li, Qiqin Wang, Jacques Crommen, Haibo Zhou, Zhengjin Jiang
The quest for higher column efficiency is one of the major research areas in polymer-based monolithic column fabrication. In this research, two novel polymer-based HILIC monolithic columns with 400μm I.D.×800μm O.D. were prepared based on the thermally initiated co-polymerization of N,N-dimethyl-N-(3-methacrylamidopropyl)-N-(3-sulfopropyl) ammonium betaine (SPP) and ethylene glycol dimethacrylate (EDMA) or N,N'-methylenebisacrylamide (MBA). In order to obtain a satisfactory performance in terms of column permeability, mechanical stability, efficiency and selectivity, the polymerization parameters were systematically optimized...
June 14, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28616992/coherent-experimental-and-simulation-approach-to-explore-the-underlying-mechanism-of-denaturation-of-stem-bromelain-in-osmolytes
#6
Anjeeta Rani, Mohamed Taha, Pannuru Venkatesu, Ming-Jer Lee
Characterization of a protein in the context of its environment is of crucial importance for a complete understanding of its function. Although biophysical techniques provide powerful tools for studying the stability and activity of the enzyme in the presence of various cosolvents, an approach of combining both experimental techniques and molecular dynamic (MD) simulations may lead to the mechanistic insight into the interactions governing the stability of an enzyme. The knowledge of these interactions can be further utilized for range of modifications in the wild form of an enzyme for various pharmaceutical applications...
June 15, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28592272/betaine-promotes-cell-differentiation-of-human-osteoblasts-in-primary-culture
#7
Isabella Villa, Pamela Senesi, Anna Montesano, Anita Ferraretto, Fernanda Vacante, Alice Spinello, Michela Bottani, Simona Bolamperti, Alessandro Rubinacci, Livio Luzi, Ileana Terruzzi
BACKGROUND: Betaine (BET), a component of many foods, is an essential osmolyte and a source of methyl groups; it also shows an antioxidant activity. Moreover, BET stimulates muscle differentiation via insulin like growth factor I (IGF-I). The processes of myogenesis and osteogenesis involve common mechanisms with skeletal muscle cells and osteoblasts sharing the same precursor. Therefore, we have hypothesized that BET might be effective on osteoblast cell differentiation. METHODS: The effect of BET was tested in human osteoblasts (hObs) derived from trabecular bone samples obtained from waste material of orthopedic surgery...
June 7, 2017: Journal of Translational Medicine
https://www.readbyqxmd.com/read/28592159/taurine-prevents-ultraviolet-b-induced-apoptosis-in-retinal-ganglion-cells
#8
Wu Dayang, Pang Dongbo
BACKGROUND: Compatible osmolytes accumulation is an active resistance response in retina under ultraviolet radiation and hypertonicity conditions. OBJECTIVE: The purpose of this research is to investigate the protective role of taurine on retina under ultraviolet B radiation. METHODS: Osmolytes transporters was measured by quantitative realtime PCR. Osmolytes uptake was estimated by radioimmunoassay. Cell viability was caculated by MTT assay...
June 7, 2017: Cutaneous and Ocular Toxicology
https://www.readbyqxmd.com/read/28582843/acute-lymphoblastic-leukemia-and-genetic-variations-in-bhmt-gene-case-control-study-and-computational-characterization
#9
Ravishankara Bellampalli, Manik Vohra, Kashish Sharma, Nalini Bhaskaranand, Kamalakshi G Bhat, Krishna Prasad, Anu R Sharma, Kapaettu Satyamoorthy, Padmalatha S Rai
BACKGROUND: Remethylation of homocysteine is catalyzed by B12 dependent methionine synthase (MTR) in all types of cells and by B12 non-dependent betaine homocysteine methyltransferase (BHMT) in liver and kidney cells. Of many etiologies of cancer, an unexplored area is the variations of genes implicated in methylation reaction. OBJECTIVE: The study evaluated the association of BHMT (rs3733890) with acute lymphoblastic leukemia (ALL), followed by in-silico characterization of variations in BHMT gene...
May 19, 2017: Cancer Biomarkers: Section A of Disease Markers
https://www.readbyqxmd.com/read/28557427/metabolomics-approach-to-evaluate-a-baltic-sea-sourced-diet-for-cultured-arctic-char-salvelinus-alpinus-l
#10
Ken Cheng, Elisabeth Müllner, Ali A Moazzami, Hanna Carlberg, Eva Brännäs, Jana Pickova
Aqua feeds traditionally rely on fishmeal as a protein source, which is costly and unsustainable. A new feed was formulated in the study with Baltic Sea sourced decontaminated fishmeal, Mytilus edulis and Saccharomyces cerevisiae, and given to Arctic char (Salvelinus alpinus) for ten months. The diet-induced changes on metabolic profile in fish plasma, liver, and muscle were studied relative to a fishmeal-based standard diet by using a (1)H NMR-based metabolomics approach. Fish fed the test diet had higher content of betaine and lower levels of trimethylamine-N-oxide and aromatic amino acids in plasma or tissues, which were mainly caused by the diet...
June 21, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28556565/demonstration-of-the-utility-of-biomarkers-for-dietary-intake-assessment-proline-betaine-as-an-example
#11
Helena Gibbons, Charlotte J R Michielsen, Milena Rundle, Gary Frost, Breige A McNulty, Anne P Nugent, Janette Walton, Albert Flynn, Michael J Gibney, Lorraine Brennan
SCOPE: There is a dearth of studies demonstrating the use of dietary biomarkers for determination of food intake. The objective of this study was to develop calibration curves for use in quantifying citrus intakes in an independent cohort. METHODS AND RESULTS: Participants (n = 50) from the NutriTech food-intake study consumed standardized breakfasts for three consecutive days over three consecutive weeks. Orange juice intake decreased over the weeks. Urine samples were analyzed by NMR-spectroscopy and proline betaine was quantified and normalized to osmolality...
May 28, 2017: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/28549240/dietary-salecan-reverts-partially-the-metabolic-gene-expressions-and-nmr-based-metabolomic-profiles-from-high-fat-diet-induced-obese-rats
#12
Qi Sun, Minghui Li, Xiao Yang, Xi Xu, Junsong Wang, Jianfa Zhang
Previous studies suggest that dietary salecan (a water-soluble β-glucan) effectively reduces high-fat-diet-induced adiposity through disturbing bile-acid-promoted emulsification in mice. However, the effects of salecan on metabolic genes and metabolites involved in lipid accumulation are mostly unknown. Here, we confirmed that dietary 3% and 6% salecan for 4 weeks markedly decreased fat accumulation in liver and adipose tissue in high-fat-diet rats, displaying a decrease in mRNA levels of SREBP1-C, FAS, SCD1 and ACC1 involved in de novo lipogenesis and a reduction of levels of GPAT1, DGAT1 and DGAT2 related to triglyceride synthesis...
May 5, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/28532150/synephrine-as-a-specific-marker-for-orange-consumption
#13
Matthias Bader, Tatjana Lang, Roman Lang, Thomas Hofmann
To validate the suitability of synephrine, known to be a highly abundant alkaloid in oranges, as a dietary biomarker for orange consumption, a highly sensitive and robust stable isotope dilution analysis (SIDA) as well as an ECHO method, using the analyte itself as a pseudointernal standard injected into the analysis run to provide an "echo peak" of the analyte, was developed to quantitate synephrine by liquid chromatography-tandem mass spectrometry (LC-MS/MS) in citrus juices and human urine before and after the ingestion of orange juice...
June 14, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28532075/can-pei-microgels-become-biocompatible-upon-betainization
#14
Nurettin Sahiner, Sahin Demirci
Polyethylene imine (PEI) microgels prepared via micro emulsion polymerization technique were treated with 1,3-propane sultone to obtained betainized PEI (b-PEI) microgels. The betainization reaction generated zwitterions on PEI microgel that are positive charges from quarternized amine groups of PEI, and the newly formed negative charges from SO3(-) groups from the modifying agent, 1,3-propane sultone offered interesting properties. The smaller size of b-PEI microgels that are obtained by simple filtration were increased with betainization from 512±14 to 1114±86nm...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28527001/the-relative-abundance-of-dimethylsulfoniopropionate-dmsp-among-other-zwitterions-in-branching-coral-at-heron-island-southern-great-barrier-reef
#15
Hilton B Swan, Elisabeth S M Deschaseaux, Graham B Jones, Bradley D Eyre
Dimethylsulfoniopropionate (DMSP) and eleven other target zwitterions were quantified in the branch tips of six Acropora species and Stylophora pistillata hard coral growing on the reef flat surrounding Heron Island in the southern Great Barrier Reef (GBR), Australia. Hydrophilic interaction liquid chromatography mass spectrometry (HILIC-MS) was used for sample analysis with isotope dilution MS applied to quantify DMSP. The concentration of DMSP was ten times greater in A. aspera than A. valida, with this difference being maintained throughout the spring, summer and winter seasons...
May 20, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28517936/in-situ-hydrogel-conditioning-of-tissue-samples-to-enhance-the-drug-s-sensitivity-in-ambient-mass-spectrometry-imaging
#16
Xiaowei Song, Zhigang Luo, Xin Li, Tiegang Li, Zhonghua Wang, Chenglong Sun, Luojiao Huang, Ping Xie, Xiaoyu Liu, Jiuming He, Zeper Abliz
Ion suppression from the tissue matrix has a severe effect on the mass spectrometry imaging (MSI) of drugs. This problem hinders further applications of MSI in preclinical drug research and development. In this study, an in situ hydrogel conditioning method was developed to enhance the sensitivity of air-flow-assisted desorption electrospray ionization (AFADESI)-MSI. Instead of the traditional washing or digestion treatment in solvent, this method used a solid phase hydrogel to "wash" tissue sections. It was demonstrated that this in situ hydrogel conditioning method improved the drug signal by as much as 2- to 25-fold in MSI, especially for hydrophobic compounds...
June 1, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28506357/-research-advances-in-the-association-between-maternal-intake-of-methyl-donor-nutrients-during-pregnancy-and-dna-methylation-in-offspring
#17
Meng-Meng Wu, Fan Yang
Maternal nutrition during pregnancy plays a vital role in the health of the offspring. Methyl donor nutrients, including folate, vitamin B12, choline, betaine, and methionine, directly affect DNA methylation and are closely associated with the health of the offspring. As an important part of epigenetics, DNA methylation plays an important role in the maintenance of normal cellular function, gene expression regulation, and embryonic development. Recent studies have shown that maternal nutrition may have a long-lasting effect on the health of the offspring via the changes in genomic DNA and/or methylation level in the promoter region in specific genes...
May 2017: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
https://www.readbyqxmd.com/read/28499186/effect-of-betaine-on-hepatic-insulin-resistance-through-foxo1-induced-nlrp3-inflammasome
#18
Dae Hyun Kim, Seong Min Kim, Bonggi Lee, Eun Kyeong Lee, Ki Wung Chung, Kyoung Mi Moon, Hye Jin An, Kyung Mok Kim, Byung Pal Yu, Hae Young Chung
In the present study, we attempted to elucidate whether molecular modulation of inflammation by betaine through the forkhead box O1 (FOXO1)-induced NLRP3 inflammasome improves insulin resistance. Betaine is a major water-soluble component of Lycium chinense. It mainly functions as an oxidative metabolite of choline by suppressing superoxide-induced free radicals by donating methyl groups. The FOXO1 transcription factor regulates various genes involved in cellular metabolic processes related to cell death as well as oxidative stress responses through binding to the thioredoxin-interacting protein (TXNIP)...
April 22, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/28496066/application-of-deep-eutectic-solvents-in-hybrid-molecularly-imprinted-polymers-and-mesoporous-siliceous-material-for-solid-phase-extraction-of-levofloxacin-from-green-bean-extract
#19
Xiaoxia Li, Kyung Ho Row
Deep eutectic solvents (DES) are potential ecofriendly surfactants for the preparation of materials. In this study, both molecularly imprinted polymers (MIPs) and mesoporous siliceous materials (MSMs) were modified by betaine-based DES. Six materials were employed as solid phase extraction (SPE) adsorbents for the rapid purification of levofloxacin. The DES-based materials showed better selective adsorption than the conventional materials. The adsorption curves of DES-MIP showed superior molecular recognition ability and binding capability for levofloxacin compared to the other materials...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28494411/deep-eutectic-solvents-ability-to-solubilize-lignin-cellulose-and-hemicellulose-thermal-stability-and-density
#20
Joan G Lynam, Narendra Kumar, Mark J Wong
An environmentally-friendly method to separate cellulose and hemicelluloses from lignin in recalcitrant biomass for subsequent conversion is desirable to reduce greenhouse gas generation. Easily-prepared, deep eutectic solvents (DESs) have low volatility, wide liquid range, non-flammability, nontoxicity, biocompatibility, and biodegradability. This study shows the DESs (formic acid:choline chloride, lactic acid:choline chloride, acetic acid:choline chloride, lactic acid:betaine, and lactic acid:proline) to be capable of preferentially dissolving lignin at 60°C...
August 2017: Bioresource Technology
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