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https://www.readbyqxmd.com/read/28646778/the-hydrological-functioning-of-a-constructed-fen-wetland-watershed
#1
Scott J Ketcheson, Jonathan S Price, Owen Sutton, George Sutherland, Eric Kessel, Richard M Petrone
Mine reclamation requires the reconstruction of entire landforms and drainage systems. The hydrological regime of reclaimed landscapes will be a manifestation of the processes operating within the individual landforms that comprise it. Hydrology is the most important process regulating wetland function and development, via strong controls on chemical and biotic processes. Accordingly, this research addresses the growing and immediate need to understand the hydrological processes that operate within reconstructed landscapes following resource extraction...
June 21, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28646681/proteomic-analysis-of-developing-wheat-grains-infected-by-powdery-mildew-blumeria-graminis-f-sp-tritici
#2
Jie Li, Xi-Wen Yang, Yong-Chun Li, Ji-Shan Niu, De-Xian He
Blumeria graminis f.sp. tritici (Bgt) infection greatly interferes with the normal source-sink relationships and always causes tremendous loss of yield and quality in wheat. To better understand the impact of this pathogen on grain development, proteome characterization during grain development in susceptible wheat cultivar Xinong 979 infected by powdery mildew was investigated by 2-DE and tandem MALDI-TOF/TOF-MS. Identification of 111 differentially expressed protein spots representing 85 unique proteins and six expression patterns showed a chronological description of wheat grain formation...
June 10, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/28646183/differences-in-nature-of-electrical-conductions-among-bi4ti3o12-based-ferroelectric-polycrystalline-ceramics
#3
Changbai Long, Qi Chang, Huiqing Fan
Bismuth titanate Bi4Ti3O12 (BiT), was one of the most promising lead-free high-temperature piezoelectric materials, due to high Curie temperature (675 °C) and large spontaneous polarization (50 µC/cm(2)); however, extensive studies had revealed that high leakage conductivity interferes with the poling process, hindering its practical applications. In this paper, an electrically insulating property was achieved by a low level Nb donor substitution to suppress a high level of holes associated with high oxygen vacancy concentration...
June 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28645873/generation-of-nitric-oxide-by-olive-olea-europaea-l-pollen-during-in-vitro-germination-and-assessment-of-the-s-nitroso-and-nitro-pollen-proteomes-by-computational-predictive-methods
#4
María José Jimenez-Quesada, Rosario Carmona, Elena Lima-Cabello, José Ángel Traverso, Antonio Jesús Castro, M Gonzalo Claros, Juan de Dios Alché
Nitric oxide is recognized as a signaling molecule involved in a broad range of physiological processes in plants including sexual reproduction. NO has been detected in the pollen grain at high levels and regulates pollen tube growth. Previous studies demonstrated that NO as well as ROS are produced in the olive reproductive tissues in a stage- and tissue-specific manner. The aim of this study was to assess the production of NO throughout the germination of olive (Olea europaea L.) pollen in vitro. The NO fluorescent probe DAF-2DA was used to image NO production in situ, which was correlated to pollen viability...
June 20, 2017: Nitric Oxide: Biology and Chemistry
https://www.readbyqxmd.com/read/28645318/detecting-consistent-patterns-of-directional-adaptation-using-differential-selection-codon-models
#5
Sahar Parto, Nicolas Lartillot
BACKGROUND: Phylogenetic codon models are often used to characterize the selective regimes acting on protein-coding sequences. Recent methodological developments have led to models explicitly accounting for the interplay between mutation and selection, by modeling the amino acid fitness landscape along the sequence. However, thus far, most of these models have assumed that the fitness landscape is constant over time. Fluctuations of the fitness landscape may often be random or depend on complex and unknown factors...
June 23, 2017: BMC Evolutionary Biology
https://www.readbyqxmd.com/read/28644997/first-episode-psychosis-moderates-the-effect-of-gray-matter-volume-on-cognition
#6
Luis F S Castro-de-Araujo, Richard A A Kanaan
Patients with first episode psychosis (FEP) present with cognitive deficits and volume differences in certain brain areas. Brain volumetric information further correlates with cognitive testing, and multiple brain areas shows different strengths of correlation with the cognitive functions being tested. Traditionally, these cognitive functions are independently related to volumetric differences, but these functions share variance. Failing to account for this aspect of cognition hinders the proper representation of cognition in neuroimaging studies...
June 15, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28644988/effect-of-marbling-on-volatile-generation-oral-breakdown-and-in-mouth-flavor-release-of-grilled-beef
#7
Damian Frank, Kornelia Kaczmarska, Janet Paterson, Udayasika Piyasiri, Robyn Warner
While the positive effect of intramuscular fat (IMF) on beef tenderness is well-established, its role in flavor generation and flavor release is less defined. To increase understanding, real-time volatile generation was monitored during grilling of beefsteaks (grass and grain-fed Angus and grass-fed Wagyu) with different amounts of IMF by proton transfer reaction mass spectrometry. Volatile concentration increased significantly (p<0.001) when the IMF was >~10%, but did not differ (p>0.05) at lower IMF levels (5...
June 15, 2017: Meat Science
https://www.readbyqxmd.com/read/28644843/a-high-density-genetic-map-and-qtl-analysis-of-agronomic-traits-in-foxtail-millet-setaria-italica-l-p-beauv-using-rad-seq
#8
Jun Wang, Zhilan Wang, Xiaofen Du, Huiqing Yang, Fang Han, Yuanhuai Han, Feng Yuan, Linyi Zhang, Shuzhong Peng, Erhu Guo
Foxtail millet (Setaria italica), a very important grain crop in China, has become a new model plant for cereal crops and biofuel grasses. Although its reference genome sequence was released recently, quantitative trait loci (QTLs) controlling complex agronomic traits remains limited. The development of massively parallel genotyping methods and next-generation sequencing technologies provides an excellent opportunity for developing single-nucleotide polymorphisms (SNPs) for linkage map construction and QTL analysis of complex quantitative traits...
2017: PloS One
https://www.readbyqxmd.com/read/28644817/graphene-based-humidity-sensors-the-origin-of-alternating-resistance-change
#9
Vasilii I Popov, Danil Nikolaev, Vladimir B Timofeev, Svetlana Smagulova, Irina Antonova
The response of graphene based humidity sensor is considered as a function of film structures. Analysis of resistance changes due to water molecule adsorption on graphene or multigraphene (MLG) surface is performed for films with a different resistivity from hundreds of Ohm/sq to hundreds of kOhm/sq. It has revealed a possible increase, decrease and non monotonous behavior of resistance. Adsorption of water molecules at grain boundary defects is supposed to lead to an increase in film resistivity due to the donor property of water and p-type conductivity of graphene...
June 23, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28644547/a-genetic-epidemiology-study-of-congenital-adrenal-hyperplasia-in-italy
#10
Alessandro Gialluisi, Soara Menabò, Lilia Baldazzi, Letizia Casula, Antonella Meloni, Maria Carla Farci, Stefano Mariotti, Luisa Balestrino, Rita Ortolano, Stefania Murru, Carlo Carcassi, Sandro Loche, Antonio Balsamo, Giovanni Romeo
Congenital Adrenal Hyperplasia due to 21-hydroxylase deficiency (21OHD-CAH) is an autosomal recessive disorder affecting steroidogenesis, due to mutations in CYP21A2 (6p21.3). 21OHD-CAH neonatal screening is based on 17-hydroxyprogesterone (17OHP) serum levels, showing high type I error rate and low sensitivity to mild CAH forms. Here, we used an epidemiological approach, which estimates the allelic frequency (q) of an autosomal recessive disorder using the proportion of homozygous patients, the mutational spectrum and the inbreeding coefficient in a sample of affected individuals...
June 23, 2017: Clinical Genetics
https://www.readbyqxmd.com/read/28643623/the-genomic-basis-of-lactobacilli-as-health-promoting-organisms
#11
Elisa Salvetti, Paul W O'Toole
Lactobacilli occupy a unique position in human culture and scientific history. Like brewer's and baker's yeast, lactobacilli have been associated with food production and preservation for thousands of years. Lactobacillus species are used in mixed microbial cultures, such as the classical Lactobacillus bulgaricus/Streptococcus thermophilus inoculum for yogurt fermentation, or combinations of diverse lactobacilli/yeasts in kefir grains. The association of lactobacilli consumption with greater longevity and improved health formed the basis for developing lactobacilli as probiotics, whose market has exploded worldwide in the past 10 years...
June 2017: Microbiology Spectrum
https://www.readbyqxmd.com/read/28643001/prediction-of-self-assemblies-of-sodium-dodecyl-sulfate-and-fragrance-additives-using-coarse-grained-force-fields
#12
Chunwei Yang, Zhe Shen, Liang Wu, Haiqiu Tang, Lifeng Zhao, FengLei Cao, Huai Sun
Coarse-grained force field (CGFF) methods were applied to study the self-assembly of sodium dodecyl sulfate with fragrance additives. The CGFF parameters were parameterized and validated using experimental and all-atom simulation data. Direct molecular dynamics simulations were carried out to characterize the initial aggregation, partitioning of fragrances, and chemical potentials of the surfactant and fragrance molecules in aggregates of different sizes. The equilibrium critical micelle concentrations (CMCs) and micelle size distributions, which could not be obtained by direct simulation, were predicted using the calculated chemical potentials in combination with a thermodynamic model...
July 2017: Journal of Molecular Modeling
https://www.readbyqxmd.com/read/28642927/the-effect-of-grinding-and-or-airborne-particle-abrasion-on-the-bond-strength-between-zirconia-and-veneering-porcelain-a-systematic-review
#13
REVIEW
Karin Lundberg, Lindsey Wu, Evaggelia Papia
Objective: The aim of the study was to make an inventory of current literature on the bond strength between zirconia and veneering porcelain after surface treatment of zirconia by grinding with diamond bur and/or with airborne-particle abrasion. Material and methods: The literature search for the present review was made following recommended guidelines using acknowledged methodology on how to do a systematic review. The electronic databases PubMed, Cochrane Library, and Science Direct were used in the present study...
January 2017: Acta Biomaterialia Odontologica Scandinavica
https://www.readbyqxmd.com/read/28642762/arbuscular-mycorrhiza-augments-arsenic-tolerance-in-wheat-triticum-aestivum-l-by-strengthening-antioxidant-defense-system-and-thiol-metabolism
#14
Surbhi Sharma, Garima Anand, Neeraja Singh, Rupam Kapoor
Arbuscular mycorrhiza (AM) can help plants to tolerate arsenic (As) toxicity. However, plant responses are found to vary with the host plant and the AM fungal species. The present study compares the efficacy of two AM fungi Rhizoglomus intraradices (M1) and Glomus etunicatum (M2) in amelioration of As stress in wheat (Triticum aestivum L. var. HD-2967). Mycorrhizal (M) and non-mycorrhizal (NM) wheat plants were subjected to four levels of As (0, 25, 50, and 100 mg As kg(-1) soil). Although As additions had variable effects on the percentage of root colonized by the two fungal inoculants, each mycobiont conferred benefits to the host plant...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28642368/the-influence-of-disulfide-bonds-on-the-mechanical-stability-of-proteins-is-context-dependent
#15
Aitor Manteca, Álvaro Alonso-Caballero, Marie Fertin, Simon Poly, David De Sancho, Raul Perez-Jimenez
Disulfide bonds play a crucial role in proteins, modulating their stability and constraining their conformational dynamics. A particularly important case is that of proteins that need to withstand forces arising from their normal biological function and that are often disulfide bonded. However, the influence of disulfides on the overall mechanical stability of proteins is poorly understood. Here, we used single-molecule force spectroscopy (smFS) to study the role of disulfide bonds in different mechanical proteins in terms of their unfolding forces...
June 22, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28641418/measuring-the-carrier-dynamics-of-photocatalyst-micrograins-using-the-christiansen-effect
#16
Gangbei Zhu, Wei Lu, Jiangrui Zhu, Yunliang Li, Liwei Guo, Yuxiang Weng
The optical measurement of photocatalyst materials is subject to Mie scattering when the particle size is comparable to the wavelength of the probe light. A novel approach was developed to deal with this scattering problem in the transient spectroscopy of photocatalyst micrograins using the Christiansen effect because the probe light in the vicinity of the Christiansen frequency can be transmitted. Scattering theory was used to analyze the transient spectra of micrograins and estimate the extinction coefficient at the Christiansen frequency...
June 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28641220/predicting-semantic-features-in-chinese-evidence-from-erps
#17
Nayoung Kwon, Patrick Sturt, Pan Liu
This article reports two ERP studies that exploited the classifier system of Mandarin Chinese to investigate semantic prediction. In Mandarin, in certain contexts, a noun has to be preceded by a classifier, which has to match the noun in semantically-defined features. In both experiments, an N400 effect was elicited in response to a classifier that mismatched an up-coming predictable noun, relative to a matching classifier. Among the mismatching classifiers, the N400 effect was graded, being smaller for classifiers that were semantically related to the predicted word, relative to classifiers that were semantically unrelated to the predicted word...
June 19, 2017: Cognition
https://www.readbyqxmd.com/read/28641182/unraveling-the-complexities-of-the-velocity-dependency-of-e-coli-retention-and-release-parameters-in-saturated-porous-media
#18
Salini Sasidharan, Scott A Bradford, Saeed Torkzaban, Xueyan Ye, Joanne Vanderzalm, Xinqiang Du, Declan Page
Escherichia coli transport and release experiments were conducted to investigate the pore-water velocity (v) dependency of the sticking efficiency (α), the fraction of the solid surface area that contributed to retention (Sf), the percentage of injected cells that were irreversibly retained (Mirr), and cell release under different (10-300mM) ionic strength (IS) conditions. Values of α, Sf, and Mirr increased with increasing IS and decreasing v, but the dependency on v was greatest at intermediate IS (30 and 50mM)...
June 19, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28641175/atmospheric-dust-deposition-on-soils-around-an-abandoned-fluorite-mine-hammam-zriba-ne-tunisia
#19
Chaima Djebbi, Fredj Chaabani, Oriol Font, Ignasi Queralt, Xavier Querol
The present study focuses on the eolian dispersion and dust deposition, of major and trace elements in soils in a semi-arid climate, around an old fluorite (CaF2) and barite (BaSO4) mine, located in Hammam Zriba in Northern Tunisia. Ore deposits from this site contain a high amount of metal sulphides constituting heavy metal pollution in the surrounding environment. Samples of waste from the surface of mine tailings and agricultural topsoil samples in the vicinity of the mine were collected. The soil samples and a control sample from unpolluted area, were taken in the direction of prevailing northwest and west winds...
June 19, 2017: Environmental Research
https://www.readbyqxmd.com/read/28641162/triterpenoids-and-sterols-from-the-grains-of-echinochloa-utilis-ohwi-yabuno-and-their-cytotoxic-activity
#20
Thi Trang Nguyen, Duc Hung Nguyen, Bing Tian Zhao, Duc Dat Le, Byung Sun Min, Young Ho Kim, Mi Hee Woo
Two new tetracyclic triterpenoids, echinochlorins C (1) and D (2), and sawamilletin (3) with new spectroscopic data were isolated from Echinochloa utilis Ohwi & Yabuno grains, along with one known triterpenoid (4) and eight sterols (5-12). Their structures were elucidated by spectroscopic data analyses (IR, UV, MS, and NMR). These compounds were tested in vitro cytotoxic activities against the human tumor-cell lines (HeLa, HL-60, and MCF-7). Compounds 6 and 8 displayed potential cytotoxic activity against HeLa, with IC50 values of 3...
June 19, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
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