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https://www.readbyqxmd.com/read/28531858/combined-acid-alkaline-peroxide-pretreatment-of-olive-tree-biomass-for-bioethanol-production
#1
José Carlos Martínez-Patiño, Encarnación Ruiz, Inmaculada Romero, Cristóbal Cara, Juan Carlos López-Linares, Eulogio Castro
Olive tree biomass (OTB) can be used for producing second generation bioethanol. In this work, extracted OTB was subjected to fractionation using a sequential acid/alkaline oxidative pretreatment. In the first acid stage, the effects of sulfuric acid concentration and reaction times at 130°C were investigated. Up to 71% solubilization of hemicellulosic sugars was achieved under optimized conditions (2.4% H2SO4, 84min). In the second stage, the influence of hydrogen peroxide concentration and process time were evaluated at 80°C...
April 28, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28531852/two-step-sequential-pretreatment-for-the-enhanced-enzymatic-hydrolysis-of-coffee-spent-waste
#2
Rajeev Ravindran, Swarna Jaiswal, Nissreen Abu-Ghannam, Amit K Jaiswal
In the present study, eight different pretreatments of varying nature (physical, chemical and physico-chemical) followed by a sequential, combinatorial pretreatment strategy was applied to spent coffee waste to attain maximum sugar yield. Pretreated samples were analysed for total reducing sugar, individual sugars and generation of inhibitory compounds such as furfural and hydroxymethyl furfural (HMF) which can hinder microbial growth and enzyme activity. Native spent coffee waste was high in hemicellulose content...
May 11, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28531783/prototypical-versus-contemporary-mediterranean-diet
#3
W Rizza, L De Gara, R Antonelli Incalzi, C Pedone
BACKGROUND AND AIMS: To investigate the evolution of the Mediterranean Diet (MD) in a delimited area of Southern Italy, by comparing the diet adopted 60-70 years ago (Prototypical Mediterranean Diet, PMD) with the contemporary one (Contemporary Mediterranean Diet, CMD), and to verify to what extent they fitted the recommendations of the Italian and the USDA dietary guidelines. METHODS: We recruited a total of 106 participants, divided in two groups. PMD group included 52 women aged >80 years, with a good cognitive function and full independence in basic and instrumental activities of daily living...
October 2016: Clinical Nutrition ESPEN
https://www.readbyqxmd.com/read/28531776/the-nutritional-value-of-food-service-meals-ordered-by-hospitalized-children
#4
Jeannie S Huang, Stanford Chun, Christopher Cheung, Linda Poon, Laura Terrones
BACKGROUND AND AIMS: US hospitals routinely provide food to hospitalized children. The nutritional content of provided foods has not been evaluated. We performed our study to examine meal orders of hospitalized youth and determine whether the nutritional contents of ordered meals meet dietary guidelines. METHODS: We performed a cross-sectional evaluation among hospitalized youth ≥1 y receiving all nutritional intake by mouth and not on a clear liquid diet. Meal orders from hospitalized youth were analyzed for nutritional content...
October 2016: Clinical Nutrition ESPEN
https://www.readbyqxmd.com/read/28531455/effect-of-serving-size-and-addition-of-sugar-on-the-glycemic-response-elicited-by-oatmeal-a-randomized-cross-over-study
#5
Thomas M S Wolever, B Jan-Willem van Klinken, Susan E Spruill, Alexandra L Jenkins, YiFang Chu, Laura Harkness
BACKGROUND & AIMS: We aimed to determine the impact of serving size and addition of sucrose on the glycemic response elicited by oatmeal. METHODS: We studied 38 healthy subjects (mean ± SD age 40 ± 12 yr, BMI 26.4 ± 3.6 kg/m(2)) on 8 separate days using a randomized, cross-over design. Capillary blood-glucose responses over 2hr after consuming 30, 40 and 60 g Classic Quaker Quick Oats (18, 24 and 36 g available-carbohydrate [avCHO], respectively) and 30 g Oats plus 9 g sucrose (27 g avCHO) were compared with those after avCHO-matched servings of Cream of Rice cereal (Control) (22, 29, 44 and 33 g cereal, respectively)...
December 2016: Clinical Nutrition ESPEN
https://www.readbyqxmd.com/read/28531327/interstrand-cross-links-arising-from-strand-breaks-at-true-abasic-sites-in-duplex-dna
#6
Zhiyu Yang, Nathan E Price, Kevin M Johnson, Yinsheng Wang, Kent S Gates
Interstrand cross-links are exceptionally bioactive DNA lesions. Endogenous generation of interstrand cross-links in genomic DNA may contribute to aging, neurodegeneration, and cancer. Abasic (Ap) sites are common lesions in genomic DNA that readily undergo spontaneous and amine-catalyzed strand cleavage reactions that generate a 2,3-didehydro-2,3-dideoxyribose sugar remnant (3'ddR5p) at the 3'-terminus of the strand break. Interestingly, this strand scission process leaves an electrophilic α,β-unsaturated aldehyde residue embedded within the resulting nicked duplex...
May 22, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28531138/phytochemical-composition-and-antioxidant-capacity-of-seven-saskatoon-berry-amelanchier-alnifolia-nutt-genotypes-grown-in-poland
#7
Sabina Lachowicz, Jan Oszmiański, Łukasz Seliga, Stanisław Pluta
The basic chemical composition, bioactive compounds, and antioxidant capacity of fruits of three new Polish breeding clones (No. 5/6, type S, and type N) and four Canadian cultivars (cvs.) ("Martin", "Smoky", "Pembina", and "Honeywood") grown in Poland in 2016 were investigated. Fruits were analyzed for their contents of triterpenoids, carotenoids, chlorophylls, and polyphenolics with the ultra-performance liquid chromatography photodiode detector-quadrupole/time-of-flight mass spectrometry (UPLC-PDA-Q/TOF-MS) method, sugar with the high-performance liquid chromatography-evaporative light scattering detector (HPLC-ELSD) method, and antioxidant capacity with the ability to reduce free radical (ABTS) and ferric reducing ability of plasma (FRAP) method...
May 21, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28530893/diabetes-control-during-ramadan-fasting
#8
REVIEW
Raveendran A V, Abdul Hamid Zargar
For diabetic patients, fasting during Ramadan, the ninth month of the Islamic calendar, can cause wide fluctuations in blood sugar levels, posing a medical challenge for patients and physicians and increasing the risk of acute metabolic complications including hypoglycemia, hyperglycemia, diabetic ketoacidosis, dehydration, and thrombosis. Proper patient education, risk stratification, and modification of antidiabetic medications can reduce the risk of complications.
May 2017: Cleveland Clinic Journal of Medicine
https://www.readbyqxmd.com/read/28530600/effects-of-electron-beam-irradiation-on-physicochemical-properties-of-corn-flour-and-improvement-of-the-gelatinization-inhibition
#9
Peiyu Xue, Yue Zhao, Chengrong Wen, Sheng Cheng, Songyi Lin
The properties and viscosity-reduction mechanism of corn flour irradiated by electron beam have not been understood properly. Here, we investigate the effects of electron beam irradiation (EBI) on the gelatinization and physicochemical properties of corn flour irradiated by 0-5.40kGy of electron beam. The total starch and crude fiber contents of corn flour decreased significantly (P<0.05) after EBI treatment, while the moisture and reducing sugar contents increased significantly (P<0.05). EBI caused perforations on the corn flour particle surfaces, and the irradiated parts of the particles would gradually peel off and afford smooth surfaces, spherical structures, and smaller sizes...
October 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28530574/sensory-profile-of-ethyl-%C3%AE-d-glucopyranoside-and-its-contribution-to-quality-of-sea-buckthorn-hippopha%C3%A3-rhamnoides-l
#10
Xueying Ma, Oskar Laaksonen, Jari Heinonen, Tuomo Sainio, Heikki Kallio, Baoru Yang
The contribution of ethyl β-d-glucopyranoside (EG) to sensory profile of sea buckthorn (Hippophaë rhamnoides ssp. rhamnoides) was studied. The content of natural existing EG varied between 0.6 and 19.8g/L in the sea buckthorn studied. The taste threshold of pure EG was estimated in water solution as 1.1±1.3g/L, and the suprathreshold aqueous EG solution (5.0g/L) was perceived mainly as bitter. In aqueous sugar-acid mixtures, acids were the major contributors to sourness and astringency, whereas the added EG or sugars showed little impact on the overall sensory profile...
October 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28529757/enzyme-activities-and-gene-expression-of-starch-metabolism-provide-insights-into-grape-berry-development
#11
Xudong Zhu, Chaobo Zhang, Weimin Wu, Xiaopeng Li, Chuan Zhang, Jinggui Fang
Grapes are categorized as a non-climacteric type of fruit which its ripening is not associated to important rises in respiration and ethylene synthesis. The starch metabolism shares a certain role in the carbohydrate metabolic pathways during grape berry development, and is regarded as an important transient pool in the pathway of sugar accumulation. However, the comprehensive role of starch and its contribution to the quality and flavor of grape berry have not been explored thoroughly. In this study, the expression levels of genes enzyme activities and carbohydrate concentrations related to starch metabolism, were analyzed to understand the molecular mechanism of starch accumulation during grape berry development...
2017: Horticulture Research
https://www.readbyqxmd.com/read/28529502/effect-of-rocket-eruca-sativa-extract-on-mrsa-growth-and-proteome-metabolic-adjustments-in-plant-based-media
#12
Agapi I Doulgeraki, Georgios Efthimiou, Spiros Paramithiotis, Katherine M Pappas, Milton A Typas, George-John Nychas
The emergence of methicillin-resistant Staphylococcus aureus (MRSA) in food has provoked a great concern about the presence of MRSA in associated foodstuff. Although MRSA is often detected in various retailed meat products, it seems that food handlers are more strongly associated with this type of food contamination. Thus, it can be easily postulated that any food could be contaminated with this pathogen in an industrial environment or in household and cause food poisoning. To this direction, the effect of rocket (Eruca sativa) extract on MRSA growth and proteome was examined in the present study...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28529223/apathy-and-type-2-diabetes-among-american-indians-exploring-the-protective-effects-of-traditional-cultural-involvement
#13
Amanda E Carlson, Benjamin D Aronson, Michael Unzen, Melissa Lewis, Gabrielle J Benjamin, Melissa L Walls
In this study we examine relationships between traditional cultural factors, apathy, and health-related outcomes among a sample of American Indian adults with type 2 diabetes. Participants completed cross-sectional interviewer-assisted paper and pencil surveys. We tested a proposed model using latent variable path analysis in order to understand the relationships between cultural participation, apathy, frequency of high blood sugar symptoms, and health-related quality of life. The model revealed significant direct effects from cultural participation to apathy, and apathy to both health-related outcomes...
2017: Journal of Health Care for the Poor and Underserved
https://www.readbyqxmd.com/read/28529041/treatment-of-supermarket-vegetable-wastes-to-be-used-as-alternative-substrates-in-bioprocesses
#14
Ana Isabel Díaz, Amanda Laca, Adriana Laca, Mario Díaz
Fruits and vegetables have the highest wastage rates at retail and consumer levels. These wastes have promising potential for being used as substrates in bioprocesses. However, an effective hydrolysis of carbohydrates that form these residues has to be developed before the biotransformation. In this work, vegetable wastes from supermarket (tomatoes, green peppers and potatoes) have been separately treated by acid, thermal and enzymatic hydrolysis processes in order to maximise the concentration of fermentable sugars in the final broth...
May 18, 2017: Waste Management
https://www.readbyqxmd.com/read/28528951/polysaccharides-from-sargassum-thunbergii-monthly-variations-and-anti-complement-and-anti-tumour-activities
#15
Weihua Jin, Ge Liu, Weihong Zhong, Chaomin Sun, Quanbin Zhang
Monthly variations of polysaccharides from Sargassum thunbergii and their anti-complement and anti-tumour activities were investigated. It was observed that an increase in fucose and total sugar contents occurred during the growth period (from early April to mid-June), accompanied by a decrease in molar ratios of other monosaccharides to fucose. The highest yields were obtained from early July to early September, which was in accordance with the significant increase in molar ratio of glucose to fucose and decrease in molar ratio of other monosaccharides to fucose...
May 18, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28528945/the-chemical-profile-and-pharmacodynamic-properties-of-extracellular-wollea-saccata-biopolymer
#16
Martina Šutovská, Michaela Kočmálová, Lenka Pappová, Soňa Fraňová, Andrej Chyba, Jiří Kopecký, Jaromír Lukavský, Vladislav Cepák, Peter Capek
Microalgae organisms are of interest for many biotechnology applications due to the production of a wide range of biologically active compounds. Incubation of W. saccata in a large scale afforded a mucilaginous, high molecular weight biopolymer composed of carbohydrate, protein and phenolic compounds. Sugar moiety was rich in hexoses (60%) and 6-deoxyhexoses (31%), while only 9% of pentoses was identified. Methylation analysis revealed about 40 types of methylated sugar derivatives, suggesting a very complex structure of Wollea biopolymer...
May 18, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28528789/mixed-culture-h2-fermentation-performance-and-the-relation-between-microbial-community-composition-and-hydraulic-retention-times-for-a-fixed-bed-reactor-fed-with-galactose-glucose-mixtures
#17
Parthiban Anburajan, Jong-Hun Park, Periyasamy Sivagurunathan, Arivalagan Pugazhendhi, Gopalakrishnan Kumar, Chang-Su Choi, Sang-Hyoun Kim
This study examined the mesophilic continuous biohydrogen fermentation from galactose and glucose mixture with an initial substrate concentration of 15 g/L (galactose 12 g/L and glucose 3 g/L) as a resembling carbon source of pretreated red algal hydrolyzate. A fixed bed reactor was fed with the sugar mixture at various hydraulic retention times (HRTs) ranging 12 to 1.5 h. The maximum hydrogen production rate of 52.6 L/L-d was found at 2 h HRT, while the maximum hydrogen yield of 2.3±0.1 mol/mol hexoseadded, was achieved at 3 h HRT...
May 18, 2017: Journal of Bioscience and Bioengineering
https://www.readbyqxmd.com/read/28528384/effects-of-salts-contained-in-lignocellulose-derived-sugar-streams-on-microbial-lipid-production
#18
Zhu Chen, Caixia Wan
This study aimed at developing low-cost, robust non-sterile fermentation processes for microbial lipid production from lignocellulose-derived sugars. Three representative oleaginous yeasts, Lipomyces tetrasporus (NRRL Y-11562), Rhodotorula toruloides (NRRL Y-1091), and Yarrowia lipolytica (NRRL YB-437), were tested for lipid production via non-sterile fermentation. Under optimal non-sterile conditions, all the tested strains had good performance on salt tolerance and lipid production. L. tetrasporus (NRRL Y-11562) gave the highest lipid titer of 12...
May 20, 2017: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/28528228/determination-of-soluble-sugar-profile-in-rice
#19
Xianqiao Hu, Changyun Fang, Lin Lu, Zhanqiang Hu, Yafang Shao, Zhiwei Zhu
Soluble sugars in rice are the main components affecting sweetness taste of rice. In this paper, an accurate, precise and rapid method for simultaneous determination of multi soluble sugars in rice by using ion chromatography equipped with pulsed amperometric detector was presented. Pretreatment and parameters of ion chromatography and pulsed amperometric detector were optimized. Regression coefficients (R) of 0.9998, 1.0000, 0.9979, 0.9998 and 0.9998 were obtained for glucose, fructose, sucrose, raffinose and maltose, respectively...
May 5, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28528003/acinetobacter-baumannii-k11-and-k83-capsular-polysaccharides-have-the-same-6-deoxy-l-talose-containing-pentasaccharide-k-units-but-different-linkages-between-the-k-units
#20
Johanna J Kenyon, Alexander S Shashkov, Sof'ya N Senchenkova, Mikhail M Shneider, Bin Liu, Anastasiya V Popova, Nikolay P Arbatsky, Konstantin A Miroshnikov, Lei Wang, Yuriy A Knirel, Ruth M Hall
Acinetobacter baumannii produces a variety of capsular polysaccharides (CPS) via genes located at the chromosomal K locus and some KL gene clusters include genes for the synthesis of specific sugars. The structures of K11 and K83 CPS produced by isolates LUH5545 and LUH5538, which carry related KL11a and KL83 gene clusters, respectively, were established by sugar analysis and one- and two-dimensional (1)H and (13)C NMR spectroscopy. Both CPS contain L-rhamnose (L-Rha) and 6-deoxy-L-talose (L-6dTal), and both KL gene clusters include genes for dTDP-L-Rhap synthesis and a tle (talose epimerase) gene encoding an epimerase that converts dTDP-L-Rhap to dTDP-L-6dTalp...
May 17, 2017: International Journal of Biological Macromolecules
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