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https://www.readbyqxmd.com/read/28230159/diversity-in-mixed-species-groups-improves-success-in-a-novel-feeder-test-in-a-wild-songbird-community
#1
Todd M Freeberg, Shannon K Eppert, Kathryn E Sieving, Jeffrey R Lucas
Mixed-species groups are common and are thought to provide benefits to group members via enhanced food finding and antipredator abilities. These benefits could accrue due to larger group sizes in general but also to the diverse species composition in the groups. We tested these possibilities using a novel feeder test in a wild songbird community containing three species that varied in their dominant-subordinate status and in their nuclear-satellite roles: Carolina chickadees (Poecile carolinensis), tufted titmice (Baeolophus bicolor), and white-breasted nuthatches (Sitta carolinensis)...
February 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28228774/molecular-and-functional-characterization-of-wheat-argos-genes-influencing-plant-growth-and-stress-tolerance
#2
Yue Zhao, Xuejun Tian, Yuanyuan Li, Liyuan Zhang, Panfeng Guan, Xiaoxia Kou, Xiaobo Wang, Mingming Xin, Zhaorong Hu, Yingyin Yao, Zhongfu Ni, Qixin Sun, Huiru Peng
Auxin Regulated Gene involved in Organ Size (ARGOS) is significantly and positively associated with organ size and is involved in abiotic stress responses in plants. However, no studies on wheat ARGOS genes have been reported to date. In the present study, three TaARGOS homoeologous genes were isolated and located on chromosomes 4A, 4B, and 4D of bread wheat, all of which are highly conserved in wheat and its wild relatives. Comparisons of gene expression in different tissues demonstrated that the TaARGOSs were mainly expressed in the stem...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28228146/body-mass-index-bmi-may-be-a-prognostic-factor-for-gastric-cancer-with-peritoneal-dissemination
#3
Shi Chen, Run-Cong Nie, Li-Ying OuYang, Yuan-Fang Li, Jun Xiang, Zhi-Wei Zhou, YingBo Chen, JunSheng Peng
BACKGROUND: The aim of this study is to investigate whether body mass index (BMI) is a prognostic factor in gastric cancer patients with peritoneal dissemination. METHODS: This is a retrospective study consisting of 518 patients with a histological diagnosis of gastric cancer with peritoneal dissemination seen at the Sixth Affiliated Hospital of Sun Yat-Sen University and Sun Yat-sen University Cancer Center between January 2010 and April 2014. Patients were followed until December 2015...
February 23, 2017: World Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28222817/livestock-and-feed-water-productivity-in-the-mixed-crop-livestock-system
#4
M Bekele, A Mengistu, B Tamir
Recently with limited information from intensified grain-based farming systems in developed countries, livestock production is challenged as being huge consumer of freshwater. The smallholder mixed crop-livestock (MCL) system which is predominant in developing countries like Ethiopia, is maintained with considerable contributions of crop residues (CR) to livestock feeding. Inclusion of CR is expected to reduce the water requirement for feed production resulting improvement in livestock water productivity (LWP)...
February 22, 2017: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/28222682/a-statistical-method-utilizing-information-of-imported-cases-to-estimate-the-transmissibility-for-an-influenza-pandemic
#5
Ka Chun Chong, Benny Chung Ying Zee, Maggie Haitian Wang
BACKGROUND: In a new influenza pandemic, travel data such as arrival times of cases seeded by the originating country can be regarded as a combination of the epidemic size and the mobility networks of infections connecting the originating country with other regions. It can be a complete and timely source for estimating the basic reproduction number (R 0 ), a key indicator of disease transmissibility. METHOD: In this study, we developed a likelihood-based method using arrival times of infected cases in different countries to estimate R 0 for influenza pandemics...
February 21, 2017: BMC Medical Research Methodology
https://www.readbyqxmd.com/read/28221804/semiconductor-seeded-nanorods-with-graded-composition-exhibiting-high-quantum-yield-high-polarization-and-minimal-blinking
#6
Ido Hadar, John Patrick Philbin, Yossef Efraim Panfil, Shany Neyshtadt, Itai Lieberman, Hagai Eshet, Sorin Lazar, Eran Rabani, Uri Banin
Seeded semiconductor nanorods represent a unique family of quantum confined materials that manifest characteristics of mixed dimensionality. They show polarized emission with high quantum yield and fluorescence switching under an electric field, features that are desirable for use in display technologies and other optical applications. So far, their robust synthesis has been limited mainly to CdSe/CdS heterostructures, thereby constraining the spectral tunability to the red region of the visible spectrum. Herein we present a novel synthesis of CdSe/Cd1-xZnxS seeded nanorods with radially graded composition that show bright and highly polarized green emission with minimal intermittency, as confirmed by ensemble and single nanorods optical measurements...
February 21, 2017: Nano Letters
https://www.readbyqxmd.com/read/28221006/controlled-synthesis-of-octahedral-platinum-based-mesocrystals-by-oriented-aggregation
#7
Ping Zhong, Hongpo Liu, Jie Zhang, Yadong Yin, Chuanbo Gao
Designed synthesis of noble metal mesocrystals is of great significance to a variety of applications. In this work, we report the synthesis of octahedral Pt-Ag alloy mesocrystals with precisely controlled morphology, size, and exposing facets, formed by oriented aggregation of their crystallites. The critical role of bromide was revealed in regulating the overall octahedral morphology of the Pt-Ag mesocrystals by bridging the interactions between the capping agent and the Ag-modified Pt crystallites. The size of the mesocrystals was precisely controlled in a broad range by tuning the number of the seeds, all retaining their octahedral morphology...
February 21, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28219849/surgical-management-of-malignant-bowel-obstruction-in-recurrent-pancreatic-cancer
#8
Hyung Sun Kim, Joon Seong Park, Jin Hong Lim, Ja Hoon Back, Dong Sup Yoon
INTRODUCTION: Malignant bowel obstruction (MBO) is harrowing complication of gastrointestinal cancers. Only a few studies have reported on the surgical roles of bowel obstruction from recurrent pancreatic cancer. We report successfully management for malignant bowel obstruction by palliative surgery for relief of symptoms. PRESENTATION OF CASE: A 43 year old man was diagnosed with pancreatic tail cancer. After distal pancreatectomy, he underwent six cycle of adjuvant chemotherapy...
January 12, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28217797/poly-vinyl-alcohol-as-a-water-protecting-agent-for-silver-nanoparticles-the-role-of-polymer-size-and-structure
#9
Alexander Kyrychenko, Dmitry A Pasko, Oleg N Kalugin
Chemical modification of silver nanoparticles (AgNPs) with a stabilizing agent, such as poly(vinyl alcohol) (PVA), plays an important role in shape-controlled seeded-growth and colloidal stability. However, theoretical aspects of the stabilizing mechanism of PVA are still poorly understood. To gain a better understanding of the role of PVA in water protecting effects for silver nanoparticles, we developed an atomistic model of a AgNP grafted with single-chain PVA of various lengths. Our model, designed for classical molecular dynamics (MD) simulations, approximates the AgNP as a quasi-spherical silver nanocrystal with 3...
February 20, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28217606/a-mixed-toxidrome-presenting-with-bilateral-ptosis-with-normal-pupils-the-first-case-in-the-literature
#10
Sanket Mahajan, Janki Shah
Snakebite is an environmental hazard associated with a significant morbidity and mortality. Two main types of toxicity occur due to snakebite, namely vasculotoxicity and neurotoxicity. Neurotoxic snakebites present mainly with bilateral ptosis with dilated pupils and/or difficulty in breathing. Jatropha curcas belongs to the family Euphorbiaceae and is commonly referred to as "Ratanjyot" in Gujarati. It has got many medicinal uses such as anticancerous properties and bio-oil. There are very few cases of its toxicity in adults...
July 2016: Journal of Family Medicine and Primary Care
https://www.readbyqxmd.com/read/28216905/green-biosynthesis-characterization-in-vitro-antidiabetic-activity-and-investigational-acute-toxicity-studies-of-some-herbal-mediated-silver-nanoparticles-on-animal-models
#11
Kalakotla Shanker, Gottumukkala Krishna Mohan, Md Ashwaq Hussain, Naradala Jayarambabu, Poka Lakshmi Pravallika
: Diabetes is a metabolic disorder characterized by hyperglycemia, altered carbohydrate, lipid and protein metabolism. In recent studies, Nanoscience and nanotechnology are blazing fields for researchers; for researchers; of late there has been a prodigious excitement in the field of nanopharmacology to study silver nanoparticle (SNP) synthesis using natural products. Biological methods have been used to synthesize SNPs using medicinally active plants having an antidiabetic role, and this made us to assess the biologically synthesized SNPs from the seed extract of Psoralea corylifolia using 1 mM silver nitrate solution...
January 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/28215565/towards-multifunctional-cellulosic-fabric-uv-photo-reduction-and-in-situ-synthesis-of-silver-nanoparticles-into-cellulose-fabrics
#12
Mohamed Rehan, Ahmed Barhoum, Guy Van Assche, Alain Dufresne, Linda Gätjen, Ralph Wilken
Herein, the highly multifunctional cotton fabric surfaces were designed with excellent coloration, UV-protection function, and antimicrobial activity. These multifunctional functions were developed by in-situ synthesis of silver nanoparticles (Ag NPs) into the cotton fabric surface using a simple green one-pot "UV-reduction" method. Cotton fabrics were pretreated with non-anionic detergent, immersed into alcoholic silver nitrate solution (concentration ranging from 100 to 500ppm), squeezed to remove excess solution and then exposed to UV-irradiation (range 320-400nm) for 1h...
February 16, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28212595/preparation-and-characterization-of-gold-nanoparticles-in-the-presence-of-citrate-and-soybean-seed-extract-in-an-acidic-conditions
#13
Ebrahim Izadi, Ali Rasooli, Abolfazl Akbarzadeh, Soodabeh Davaran
Through the present study, an eco-friendly method was used to synthesize the gold nanoparticles (GNPs) by using the sodium citrate and extract of the soybean seed as reducing the agents at PH 3. X-Ray diffraction (XRD) method was used to evaluate the crystal structure of as-synthesized NPs and it's revealed that this method leads to well crystallized GNPs. In order to determine the particle size and their distribution, field emission scanning microscopy (FE-SEM) and dynamic light scattering (DLS) were used...
February 17, 2017: Drug Research
https://www.readbyqxmd.com/read/28212344/green-microwave-assisted-combustion-synthesis-of-zinc-oxide-nanoparticles-with-citrullus-colocynthis-l-schrad-characterization-and-biomedical-applications
#14
Susan Azizi, Rosfarizan Mohamad, Mahnaz Mahdavi Shahri
In this paper, a green microwave-assisted combustion approach to synthesize ZnO-NPs using zinc nitrate and Citrullus colocynthis (L.) Schrad (fruit, seed and pulp) extracts as bio-fuels is reported. The structure, optical, and colloidal properties of the synthesized ZnO-NP samples were studied. Results illustrate that the morphology and particle size of the ZnO samples are different and depend on the bio-fuel. The XRD results revealed that hexagonal wurtzite ZnO-NPs with mean particle size of 27-85 nm were produced by different bio-fuels...
February 16, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28212324/differential-gene-expression-in-the-meristem-and-during-early-fruit-growth-of-pisum-sativum-l-identifies-potential-targets-for-breeding
#15
Annu Smitha Ninan, Anish Shah, Jiancheng Song, Paula E Jameson
For successful molecular breeding it is important to identify targets to the gene family level, and in the specific species of interest, in this case Pisum sativum L. The cytokinins have been identified as a key breeding target due to their influence on plant architecture, and on seed size and sink activity. We focused on the cytokinin biosynthetic gene family (the IPTs) and the gene family key to the destruction of cytokinins (the CKXs), as well as other gene families potentially affected by changing cytokinin levels...
February 16, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28208344/first-order-transition-in-a-percolation-model-with-nucleation-and-preferential-growth
#16
Bappaditya Roy, S B Santra
The spanning cluster properties of a percolation model with nucleation and preferential growth exhibit first-order transitions depending on the values of the growth parameter g_{0} and the initial seed concentration ρ. Except for the preferential growth of smaller clusters with a size-dependent growth probability of amplitude g_{0}, the model preserves all other criteria of the original percolation model. As ρ decreases starting from the percolation threshold p_{c} of the original percolation, a line of continuous transition encounters a coexistence region of percolative and nonpercolative large clusters...
January 2017: Physical Review. E
https://www.readbyqxmd.com/read/28199307/arrays-of-horizontal-carbon-nanotubes-of-controlled-chirality-grown-using-designed-catalysts
#17
Shuchen Zhang, Lixing Kang, Xiao Wang, Lianming Tong, Liangwei Yang, Zequn Wang, Kuo Qi, Shibin Deng, Qingwen Li, Xuedong Bai, Feng Ding, Jin Zhang
The semiconductor industry is increasingly of the view that Moore's law-which predicts the biennial doubling of the number of transistors per microprocessor chip-is nearing its end. Consequently, the pursuit of alternative semiconducting materials for nanoelectronic devices, including single-walled carbon nanotubes (SWNTs), continues. Arrays of horizontal nanotubes are particularly appealing for technological applications because they optimize current output. However, the direct growth of horizontal SWNT arrays with controlled chirality, that would enable the arrays to be adapted for a wider range of applications and ensure the uniformity of the fabricated devices, has not yet been achieved...
February 15, 2017: Nature
https://www.readbyqxmd.com/read/28198985/cell-aggregation-enhances-bone-formation-by-human-mesenchymal-stromal-cells
#18
A Chatterjea, V L LaPointe, A Barradas, H Garritsen, H Yuan, A Renard, C A van Blitterswijk, J de Beor
The amount of bone generated using current tissue engineering approaches is insufficient for many clinical applications. Previous in vitro studies suggest that culturing cells as 3D aggregates can enhance their osteogenic potential, but the effect on bone formation in vivo is unknown. Here, we use agarose wells to generate uniformly sized mesenchymal stromal cell (MSC) aggregates. When combined with calcium phosphate ceramic particles and a gel prepared from human platelet-rich plasma, we generated a tissue engineered construct which significantly improved in vivo bone forming capacity as compared to the conventional system of using single cells seeded directly on the ceramic surface...
February 15, 2017: European Cells & Materials
https://www.readbyqxmd.com/read/28194718/employing-central-composite-design-for-evaluation-of-biomass-production-by-fusarium-venenatum-in-vivo-antioxidant-and-antihyperlipidemic-properties
#19
Asha Byju Thomas, Trupti Dattatray Shetane, Ranu Goutam Singha, Rabindra K Nanda, Sushilkumar S Poddar, Ajinath Shirsat
The present study deals with the cost effective production of biomass from Fusarium venenatum using different carbon sources (cane sugar, brown sugar, malt and fructose). Optimization of selected carbon sources and seed size using Central Composite Response Surface Design (CCRSD) indicated that sucrose (1.64 g/100 mL) and seed size (10% v/v) were optimal in maximizing biomass yield (0.5602 g/100 mL, p < 0.0001) and protein yield (49.99%, p < 0.01) of Fusarium venenatum. The acetonitrile and methanolic extracts of biomass showed promising antioxidant activity (DPPH assay, 59...
February 13, 2017: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/28193168/genome-wide-snp-identification-linkage-map-construction-and-qtl-mapping-for-seed-mineral-concentrations-and-contents-in-pea-pisum-sativum-l
#20
Yu Ma, Clarice J Coyne, Michael A Grusak, Michael Mazourek, Peng Cheng, Dorrie Main, Rebecca J McGee
BACKGROUND: Marker-assisted breeding is now routinely used in major crops to facilitate more efficient cultivar improvement. This has been significantly enabled by the use of next-generation sequencing technology to identify loci and markers associated with traits of interest. While rich in a range of nutritional components, such as protein, mineral nutrients, carbohydrates and several vitamins, pea (Pisum sativum L.), one of the oldest domesticated crops in the world, remains behind many other crops in the availability of genomic and genetic resources...
February 13, 2017: BMC Plant Biology
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