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https://www.readbyqxmd.com/read/28522395/non-covalent-interaction-between-ferulic-acid-and-arabinan-rich-pectic-polysaccharide-from-rapeseed-meal
#1
Dongxian Zhang, Jianfei Zhu, Fayin Ye, Guohua Zhao
The sorption capacity of arabinan-rich pectic polysaccharide (ARPP) onto ferulic acid (FA) was investigated using equilibrium dialysis assays. UV and FT-IR spectra showed that FA was successfully adsorbed by ARPP. The effects of temperature, pH, buffer concentration, NaCl, and ethanol on sorption were investigated. Sorption variable optimization was examined by response surface methodology. The order of influence of each factor in affecting the sorption capacity was temperature>pH>buffer concentration...
May 15, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28520770/life-history-trade-off-moderates-model-predictions-of-diversity-loss-from-climate-change
#2
Helen Moor
Climate change can trigger species range shifts, local extinctions and changes in diversity. Species interactions and dispersal capacity are important mediators of community responses to climate change. The interaction between multispecies competition and variation in dispersal capacity has recently been shown to exacerbate the effects of climate change on diversity and to increase predictions of extinction risk dramatically. Dispersal capacity, however, is part of a species' overall ecological strategy and are likely to trade off with other aspects of its life history that influence population growth and persistence...
2017: PloS One
https://www.readbyqxmd.com/read/28516994/3d-ordered-porous-moxc-x-1-or-2-for-advanced-hydrogen-evolution-and-li-storage
#3
Hong Yu, Haosen Fan, Jiong Wang, Yun Zheng, Zhengfei Dai, Yizhong Lu, Junhua Kong, Xin Wang, Young Jin Kim, Qingyu Yan, Jong-Min Lee
3D ordered porous structures of MoxC are prepared with different Mo to C ratios and tested for two possible promising applications: hydrogen evolution reaction (HER) through water splitting and lithium ion batteries (LIBs). Mo2C and MoC with 3D periodic ordered structures are prepared with a similar process but different precursors. The 3D ordered porous MoC exhibits excellent cycling stability and rate performance as an anode material for LIBs. A discharge capacity of 450.9 mA h g(-1) is maintained up to 3000 cycles at 10...
May 18, 2017: Nanoscale
https://www.readbyqxmd.com/read/28514452/isotopic-evidence-of-multiple-controls-on-atmospheric-oxidants-over-climate-transitions
#4
Lei Geng, Lee T Murray, Loretta J Mickley, Pu Lin, Qiang Fu, Andrew J Schauer, Becky Alexander
The abundance of tropospheric oxidants, such as ozone (O3) and hydroxyl (OH) and peroxy radicals (HO2 + RO2), determines the lifetimes of reduced trace gases such as methane and the production of particulate matter important for climate and human health. The response of tropospheric oxidants to climate change is poorly constrained owing to large uncertainties in the degree to which processes that influence oxidants may change with climate and owing to a lack of palaeo-records with which to constrain levels of atmospheric oxidants during past climate transitions...
May 17, 2017: Nature
https://www.readbyqxmd.com/read/28511620/is-children-s-listening-effort-in-background-noise-influenced-by-the-speaker-s-voice-quality
#5
Birgitta Sahlén, Magnus Haake, Heike von Lochow, Lucas Holm, Tobias Kastberg, K Jonas Brännström, Viveka Lyberg-Åhlander
The present study aims at exploring the influence of voice quality on listening effort in children performing a language comprehension test with sentences of increasing difficulty. Listening effort is explored in relation to gender ( = cisgender). The study has a between-groups design. Ninety-three mainstreamed children aged 8;2 to 9;3 with typical language development participated. The children were randomly assigned to two groups (n = 46/47) with equal allocation of boys and girls and for the analysis to four groups depending of gender and voice condition...
May 17, 2017: Logopedics, Phoniatrics, Vocology
https://www.readbyqxmd.com/read/28508123/photochemically-controlled-drug-dosing-from-a-polymeric-scaffold
#6
Louise Donnelly, John G Hardy, Sean P Gorman, David S Jones, Nicola J Irwin, Colin P McCoy
PURPOSE: To develop the first photoactive biomaterial coating capable of controlled drug dosing via inclusion of synthesised drug-3,5-dimethoxybenzoin (DMB) conjugates in a poly(2-methyoxyethyl acrylate) (pMEA) scaffold. METHODS: Flurbiprofen- and naproxen-DMB conjugates were prepared via esterification and characterised via NMR spectroscopy and mass spectrometry following chromatographic purification. Conjugate photolysis was investigated in acetonitrile solution and within the pMEA matrix following exposure to low-power 365 nm irradiation...
May 15, 2017: Pharmaceutical Research
https://www.readbyqxmd.com/read/28506813/the-effects-of-natural-clinoptilolite-and-nano-sized-clinoptilolite-supplementation-on-glucose-levels-and-oxidative-stress-in-rats-with-streptozotocin-induced-diabetes
#7
Behnoosh Hossein Nia, Sirous Khorram, Hassan Rezazadeh, Abdolrasol Safaiyan, Ali Tarighat-Esfanjani
OBJECTIVE: Oxidative stress has a major role in development of diabetic complications. In this study we investigated whether clinoptilolite and nano-sized clinoptilolite could reduce hyperglycemia and oxidative stress in streptozotocin-induced diabetic rats and attempted to determine which intervention was more effective. METHODS: Thirty-six rats were randomly allocated to 2 groups; 1 group was randomly chosen as a diabetic group and injected with streptozotocin (60 mg/kg body weight in 0...
May 12, 2017: Canadian Journal of Diabetes
https://www.readbyqxmd.com/read/28505408/ion-mobility-hydrogen-deuterium-exchange-and-isotope-scrambling-tools-to-aid-compound-identification-in-omics-mixtures
#8
Hossein Maleki, Megan M Maurer, Nima Ronaghi, Stephen J Valentine
Liquid chromatography tandem mass spectrometry (LC-MS/MS), a widely used method for comparative 'omics analysis, experiences challenges with compound identification due to matrix effects, difficulty in separating isomer and isobaric ions, and long analysis times. Ion mobility spectrometry (IMS) has proven to be useful in separating isomer and isobar ions, however IMS-MS suffers from decreased peak capacity duet to the correlation in ion size and mass. In proof-of-principle experiments, the use of gas-phase hydrogen/deuterium exchange (HDX) combined with IMS-MS/MS techniques is demonstrated to offer advantages for compound identification...
May 15, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28504016/dna-isolation-by-galactoacrylate-based-nano-poly-hema-co-gal-opa-nanopolymers
#9
Ceren Türkcan Kayhan, Fulden Zeynep Ural, Meryem Koruyucu, Yeşim Gül Salman, Murat Uygun, Deniz Aktaş Uygun, Sinan Akgöl, Adil Denizli
Isolation of DNA is one of the important processes for biotechnological applications such as investigation of DNA structures and functions, recombinant DNA preparations, identification of genetic factors and diagnosis and treatment of genetic disorders. The aim of this study was to synthesis and characterizes the galactoacrylate based nanopolymers with high surface area and to investigate the usability of these synthesized nanopolymers for DNA isolation studies. Nanopolymers were synthesized by the surfactant free emulsion polymerization technique by using the monomers of 2-hydroxyl ethylmethacrylate and 6-O-(2(')-hydroxy-3'-acryloyloxypropyl)-1,2:3,4-di-O-isopropylidene-α-D-galactopyranose...
May 15, 2017: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/28503691/a-rapidly-prototyped-microfluidic-device-for-size-based-nucleic-acid-fractionation-using-isotachophoresis
#10
C Eid, S S Branda, R J Meagher
We present a novel microfluidic device for size-based nucleic acid (NA) fractionation using isotachophoresis (ITP) and an ionic spacer. Our rapid-prototyped laser-cut plastic device has easily modifiable channel dimensions, can process up to 10 μL of sample, and contains an in-line extraction reservoir for minimally-disruptive manual collection of size-fractionated NAs. We designed custom buffering reservoirs using 1 mL pipette tips to provide high buffering capacity and prevent bubbles from entering the microfluidic channels...
May 15, 2017: Analyst
https://www.readbyqxmd.com/read/28503195/strategies-for-improved-isopropanol-butanol-production-by-a-clostridium-strain-from-glucose-and-hemicellulose-through-consolidated-bioprocessing
#11
Fengxue Xin, Tianpeng Chen, Yujiang Jiang, Weiliang Dong, Wenming Zhang, Min Zhang, Hao Wu, Jiangfeng Ma, Min Jiang
BACKGROUND: High cost of traditional substrates and formation of by-products (such as acetone and ethanol) in acetone-butanol-ethanol (ABE) fermentation hindered the large-scale production of biobutanol. Here, we comprehensively characterized a newly isolated solventogenic and xylanolytic Clostridium species, which could produce butanol at a high ratio with elimination of ethanol and conversion of acetone to more value-added product, isopropanol. Ultimately, direct butanol production from hemicellulose was achieved with efficient expression of indigenous xylanase by the novel strain via consolidated bioprocessing...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28502647/an-accurate-specific-sensitive-high-throughput-method-based-on-a-microsphere-immunoassay-for-multiplex-detection-of-three-viruses-and-bacterial-fruit-blotch-bacterium-in-cucurbits
#12
Ratthaphol Charlermroj, Manlika Makornwattana, Orawan Himananto, Channarong Seepiban, Sudtida Phuengwas, Nuchnard Warin, Oraprapai Gajanandana, Nitsara Karoonuthaisiri
To employ a microsphere immunoassay (MIA) to simultaneously detect multiple plant pathogens (potyviruses, Watermelon silver mottle virus, Melon yellow spot virus, and Acidovorax avenae subsp. citrulli) in actual plant samples, several factors need to be optimized and rigorously validated. Here, a simple extraction method using a single extraction buffer was successfully selected to detect the four pathogens in various cucurbit samples (cucumber, cantaloupe, melon, and watermelon). The extraction method and assay performance were validated with inoculated and field cucurbit samples...
May 11, 2017: Journal of Virological Methods
https://www.readbyqxmd.com/read/28500423/physiological-self-regulation-buffers-the-relationship-between-impulsivity-and-externalizing-behaviors-among-nonclinical-adolescents
#13
Michelle A Kuhn, Joshua J Ahles, Jaclyn T Aldrich, Madeline D Wielgus, Amy H Mezulis
Trait impulsivity is a risk factor for rule breaking and aggressive (externalizing) behaviors among nonclinical youth. Buffers of trait-based risk are of practical interest to preventing externalizing behaviors. One such buffer may be the capacity and efforts of a child to self-regulate their physiology. Youth who possess baseline physiological self-regulatory capacities are more likely to maintain adaptive engagement with their environment and may be less prone to impulsively rule break or be aggressive. Similarly, youth who are able to use self-regulatory skills to calm their physiology in times of stress may be less likely to externalize distress...
May 12, 2017: Journal of Youth and Adolescence
https://www.readbyqxmd.com/read/28493864/power-provides-protection-genetic-robustness-in-yeast-depends-on-the-capacity-to-generate-energy
#14
Marcin Plech, Katarzyna Tomala, Hanna Tutaj, Dominika Ewa Piwcewicz, J Arjan G M de Visser, Ryszard Korona
The functional basis of genetic robustness, the ability of organisms to suppress the effects of mutations, remains incompletely understood. We exposed a set of 15 strains of Saccharomyces cerevisiae form diverse environments to increasing doses of the chemical mutagen EMS. The number of the resulting random mutations was similar for all tested strains. However, there were differences in immediate mortality after the mutagenic treatment and in defective growth of survivors. An analysis of gene expression revealed that immediate mortality was lowest in strains with lowest expression of transmembrane proteins, which are rich in thiol groups and thus vulnerable to EMS...
May 11, 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28492187/evaluation-and-association-of-serum-iron-and-ferritin-levels-in-children-with-dental-caries
#15
N S Venkatesh Babu, Parin Vasant Bhanushali
BACKGROUND: Iron deficiency anemia accounts for 90% of all types of anemia in the world. Although the prevalence has declined in recent years, it remains an important pediatric public health problem. Iron deficiency has also been associated with dental caries. It impairs salivary gland function causing reduced salivary secretion and buffering capacity leading to increased caries activity. AIM: The aim of the study is to explore an association between dental caries and serum levels of iron and ferritin in children aged 3-12 years...
April 2017: Journal of the Indian Society of Pedodontics and Preventive Dentistry
https://www.readbyqxmd.com/read/28482599/phenylboronic-acid-diol-crosslinked-6-o-vinylazeloyl-d-galactose-nanocarriers-for-insulin-delivery
#16
Jun-Zi Wu, David H Bremner, He-Yu Li, Shi-Wei Niu, Shu-De Li, Li-Min Zhu
A new block polymer named poly 3-acrylamidophenylboronic acid-b-6-O-vinylazeloyl-d-galactose (p(AAPBA-b-OVZG)) was prepared using 3-acrylamidophenylboronic acid (AAPBA) and 6-O-vinylazeloyl-d-galactose (OVZG) via a two-step procedure involving S-1-dodecyl-S-(α', α'-dimethyl-α″-acetic acid) trithiocarbonate (DDATC) as chain transfer agent, 2,2-azobisisobutyronitrile (AIBN) as initiator and dimethyl formamide (DMF) as solvent. The structures of the polymer were examined by Fourier transform infrared spectroscopy (FT-IR) and (1)H NMR and the thermal stability was determined by thermal gravimetric analysis (TG/DTG)...
July 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28475340/pipe-wire-tio2-sn-carbon-nanofibers-paper-anodes-for-lithium-and-sodium-ion-batteries
#17
Minglei Mao, Feilong Yan, Chunyu Cui, Jianmin Ma, Ming Zhang, Taihong Wang, Chunsheng Wang
Metallic tin has been considered as one of the most promising anode materials both for lithium (LIBs) and sodium ion battery (NIBs) because of a high theoretical capacity and an appropriate low discharge potential. However, Sn anodes suffer from a rapid capacity fading during cycling due to pulverization induced by severe volume changes. Here we innovatively synthesized pipe-wire TiO2-Sn@carbon nanofibers (TiO2-Sn@CNFs) via electrospinning and atomic layer deposition to suppress pulverization-induced capacity decay...
May 10, 2017: Nano Letters
https://www.readbyqxmd.com/read/28469407/analytical-method-validation-of-high-performance-liquid-chromatography-and-stability-indicating-study-of-medroxyprogesterone-acetate-intravaginal-sponges
#18
Nidal Batrawi, Shorouq Wahdan, Murad Abualhasan
Medroxyprogesterone acetate is widely used in veterinary medicine as intravaginal dosage for the synchronization of breeding cycle in ewes and goats. The main goal of this study was to develop reverse-phase high-performance liquid chromatography method for the quantification of medroxyprogesterone acetate in veterinary vaginal sponges. A single high-performance liquid chromatography/UV isocratic run was used for the analytical assay of the active ingredient medroxyprogesterone. The chromatographic system consisted of a reverse-phase C18 column as the stationary phase and a mixture of 60% acetonitrile and 40% potassium dihydrogen phosphate buffer as the mobile phase; the pH was adjusted to 5...
2017: Analytical Chemistry Insights
https://www.readbyqxmd.com/read/28466818/evaluation-of-relationship-between-aerobic-fitness-level-and-range-of-isocapnic-buffering-periods-during-incremental-exercise-test
#19
S Algul, O Ozcelik, B Yilmaz
The purpose of this study is to examine the relationship between the amount of O2 uptake (VO2) in the range of isocapnic buffering (ICB) periods and aerobic fitness levels of subjects with different exercise tolerance levels. A total of 50 young male subjects (20.8±0.4 years) performed an incremental exercise test using a cycle ergometer to determinetheir anaerobic threshold (AT), respiratory compensation point (RCP) and maximal exercise capacity (Wmax). The ICB period is defined as the region between AT and RCP...
March 31, 2017: Cellular and Molecular Biology
https://www.readbyqxmd.com/read/28466268/squid-giant-axons-synthesize-nf-proteins
#20
Marianna Crispino, Jong Tai Chun, Antonio Giuditta
Squid giant axon has been an excellent model system for studying fundamental topics in neurobiology such as neuronal signaling. It has been also useful in addressing the questions of local protein synthesis in the axons. Incubation of isolated squid giant axons with [(35)S]methionine followed by immunoprecipitation with a rabbit antibody against all squid neurofilament (NF) proteins demonstrates the local synthesis of a major 180 kDa NF protein and of several NF proteins of lower molecular weights. Their identification as NF proteins is based on their absence in the preimmune precipitates...
May 2, 2017: Molecular Neurobiology
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