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https://www.readbyqxmd.com/read/28110446/fabrication-and-optical-properties-of-strain-free-self-assembled-mesoscopic-gaas-structures
#1
Saimon Filipe Covre da Silva, Thayná Mardegan, Sidnei Ramis de Araújo, Carlos Alberto Ospina Ramirez, Suwit Kiravittaya, Odilon D D Couto, Fernando Iikawa, Christoph Deneke
We use a combined process of Ga-assisted deoxidation and local droplet etching to fabricate unstrained mesoscopic GaAs/AlGaAs structures exhibiting a high shape anisotropy with a length up to 1.2 μm and a width of 150 nm. We demonstrate good controllability over size and morphology of the mesoscopic structures by tuning the growth parameters. Our growth method yields structures, which are coupled to a surrounding quantum well and present unique optical emission features. Microscopic and optical analysis of single structures allows us to demonstrate that single structure emission originates from two different confinement regions, which are spectrally separated and show sharp excitonic lines...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28110331/distinct-benefit-of-overall-survival-between-patients-with-non-small-cell-lung-cancer-harboring-egfr-exon-19-deletion-and-exon-21-l858r-substitution
#2
Nobuyuki Koyama, Yasutaka Watanabe, Yuki Iwai, Rumi Kawamura, Chihiro Miwa, Yoshiaki Nagai, Koichi Hagiwara, Shinichiro Koyama
BACKGROUND: Exon 19 deletion (Del19) and exon 21 L858R substitution (L858R), which account for 90% of epidermal growth factor receptor (EGFR) mutations as common mutations, are associated with favorable outcomes with EGFR-tyrosine kinase inhibitors (TKIs) compared with other uncommon EGFR mutations in non-small-cell lung cancer (NSCLC). However, whether there are differences in overall survival (OS) between patients with these common EGFR mutations remains controversial. METHODS: The subjects studied were 74 NSCLC patients with common EGFR mutations treated with gefitinib or erlotinib...
January 21, 2017: Chemotherapy
https://www.readbyqxmd.com/read/28110201/influence-of-soil-types-and-osmotic-pressure-on-growth-and-137-cs-accumulation-in-blackgram-vigna-mungo-l
#3
Khin Thuzar Win, Aung Zaw Oo, Sonoko Dorothea Bellingrath-Kimura
A pot experiment was conducted to study the effects of soil types and osmotic levels on growth and (137)Cs accumulation in two blackgram varieties differing in salinity tolerance grown in Fukushima contaminated soils. The contamination levels of the sandy clay loam and clay soil were 1084 and 2046 Bq kg(-1) DW, respectively. The (137)Cs activity was higher in both plants grown on the sandy clay loam than on the clay soil regardless of soil (137)Cs activity concentration. No significant differences were observed in all measured growth parameters between the two varieties under optimal water conditions for both types of soil...
January 19, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28110193/effects-of-polyphenol-compounds-melanin-on-nafld-nash-prevention
#4
Natalia Belemets, Nazarii Kobyliak, Oleksandr Virchenko, Tetyana Falalyeyeva, Tsyryuk Olena, Petro Bodnar, Oleksiy Savchuk, Tetyana Galenova, Martin Caprnda, Luis Rodrigo, Lubomir Skladany, Delian Delev, Radka Opatrilova, Peter Kruzliak, Tetyana Beregova, Lyudmyla Ostapchenko
BACKGROUND: One of the pathogenic mechanisms of the progression non-alcoholic liver disease (NAFLD) to nonalcoholic steatohepatitis (NASH) is the accumulation of reactive oxygen species (ROS). So, antioxidant therapy is necessary for successful treatment of the liver injury. We have paid attention to melanin produced by yeast Nadsoniella nigra strain X-1 as novel antioxidant and anti-inflammatory agents with low toxicity. In current study we aimed to investigate the preventive effect of melanin on the monosodium glutamate (MSG) induced NAFLD model in rats...
January 19, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28109820/how-does-the-size-of-gold-nanoparticles-depend-on-citrate-to-gold-ratio-in-turkevich-synthesis-final-answer-to-a-debated-question
#5
Li Shi, Eric Buhler, François Boué, Florent Carn
The dependence between the size of gold nanoparticle (AuNP) and the citrate to gold molar ratio (X) is still a matter of debate 65years after the seminal work by Turkevich et al. for high X values. We assume that this dispersion of results is due to the variation of certain parameters that are often not mentioned in the protocols, and to the use of a single characterization technique (dynamic light scattering (DLS) or transmission electron microscopy (TEM)). To adress definitely the question of this dependence, we have synthesized AuNPs with very precise protocols ensuring that the only parameters to be modified are X and the sequence of reagent addition...
October 25, 2016: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28109240/microphase-separation-in-random-multiblock-copolymers
#6
E N Govorun, A V Chertovich
Microphase separation in random multiblock copolymers is studied with the mean-field theory assuming that long blocks of a copolymer are strongly segregated, whereas short blocks are able to penetrate into "alien" domains and exchange between the domains and interfacial layer. A bidisperse copolymer with blocks of only two sizes (long and short) is considered as a model of multiblock copolymers with high polydispersity in the block size. Short blocks of the copolymer play an important role in the microphase separation...
January 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28109010/lack-of-effects-of-an-equine-chorionic-gonadotropin-ecg-administration-between-days-9-and-15-postpartum-on-reproductive-performance-in-a-holstein-dairy-herd
#7
M Freick, O Passarge, J Weber
Recently, it has been demonstrated that administration of equine chorionic gonadotropin (eCG) in the postpartum period in dairy cows can enhance follicle growth, reduce the interval from calving to first ovulation and increase plasma estradiol concentrations, and, thus, could enhance reproductive performance in a dairy herd when administered on day 6 postpartum. The aim of this study was to investigate the effects of a single dose of eCG between days 9 and 15 postpartum on parameters of reproductive performance in dairy cows...
January 21, 2017: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/28108862/effects-of-chromium-methionine-supplementation-with-different-sources-of-zinc-on-growth-performance-carcass-traits-meat-quality-serum-metabolites-endocrine-parameters-and-the-antioxidant-status-in-growing-finishing-pigs
#8
Xiao Xu, Li Liu, Shen-Fei Long, Xiang-Shu Piao, Terry L Ward, Fei Ji
This experiment was conducted to evaluate the effects of chromium methionine with/without zinc sulfate or zinc amino acid complex on the growth performance, carcass traits, meat quality, serum parameters, endocrine parameters, and antioxidant status of growing-finishing pigs. A total of 180 (32.0 ± 1.7 kg body weight, BW) crossbred pigs (Duroc × Landrace × Yorkshire) were used in a completely randomized design with three dietary treatments and 10 replicates per treatment (five pens of barrows and five pens of gilts with six pigs per replicate)...
January 21, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/28108763/carbon-source-regulation-of-gene-expression-in-methylosinus-trichosporium-ob3b
#9
Muhammad Farhan Ul Haque, Wenyu Gu, Bipin S Baral, Alan A DiSpirito, Jeremy D Semrau
Gene expression in methanotrophs has been shown to be affected by the availability of a variety of metals, most notably copper regulating expression of alternative forms of methane monooxygenase. Here, we show that growth substrate also affects expression of genes encoding for enzymes responsible for the oxidation of methane to formaldehyde and the assimilation of carbon. Specifically, in Methylosinus trichosporium OB3b, expression of genes involved in the conversion of methane to methanol (pmoA and mmoX) and methanol to formaldehyde (mxaF, xoxF1, and xoxF2) as well as in carbon assimilation (fae1, fae2, metF, and sga) decreased when this strain was grown on methanol vs...
January 20, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28107878/effect-of-strategic-administration-of-an-encapsulated-blend-of-formic-acid-citric-acid-and-essential-oils-on-salmonella-carriage-seroprevalence-and-growth-of-finishing-pigs
#10
Kavita Walia, Hector Argüello, Helen Lynch, Finola C Leonard, Jim Grant, Dermot Yearsley, Sinead Kelly, Geraldine Duffy, Gillian E Gardiner, Peadar G Lawlor
Controlling Salmonella at farm level can act as the first line of defence in reducing salmonellosis from pork. This study investigated the efficacy of an encapsulated blend of formic acid, citric acid, and essential oils (FormaXOL™) administered to finisher pigs for 28days prior to slaughter in controlling Salmonella shedding on a commercial farm with a history of high Salmonella seroprevalence. Fourteen pens of 8-10 pigs/pen were randomly assigned to a control (finisher diet without additive) or a treatment group (the same diet with 4kg/t of FormaXOL™) for 28 days...
February 1, 2017: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/28107643/does-psychological-well-being-change-following-treatment-an-exploratory-study-on-outpatients-with-eating-disorders
#11
Elena Tomba, Lucia Tecuta, Romana Schumann, Donatella Ballardini
Psychological well-being changes following cognitive-behavioral therapy-based treatment were investigated in outpatients with eating disorders (ED). While it is known that CBT reduces symptomatology in EDs, less is known about how changes in positive functioning may ensue. One-hundred and eighty five ED outpatients were analyzed for pre-treatment and post-treatment changes in psychological well-being (PWB) by last observation carried forward - Wilcoxon signed rank tests. Significant gains in all PWB dimensions were found, with moderate effect size correlations in environmental mastery (r=-...
January 7, 2017: Comprehensive Psychiatry
https://www.readbyqxmd.com/read/28107495/germination-response-of-four-alien-congeneric-amaranthus-species-to-environmental-factors
#12
Jian-Hua Hao, Shuang-Shuang Lv, Saurav Bhattacharya, Jian-Guo Fu
Seed germination is the key step for successful establishment, growth and further expansion of population especially for alien plants with annual life cycle. Traits like better adaptability and germination response were thought to be associated with plant invasion. However, there are not enough empirical studies correlating adaptation to environmental factors with germination response of alien invasive plants. In this study, we conducted congeneric comparisons of germination response to different environmental factors such as light, pH, NaCl, osmotic and soil burials among four alien amaranths that differ in invasiveness and have sympatric distribution in Jiangsu Province, China...
2017: PloS One
https://www.readbyqxmd.com/read/28107461/inhibition-of-fatty-acid-synthase-reduces-blastocyst-hatching-through-regulation-of-the-akt-pathway-in-pigs
#13
Jing Guo, Nam-Hyung Kim, Xiang-Shun Cui
Fatty acid synthase (FASN) is an enzyme responsible for the de novo synthesis of long-chain fatty acids. During oncogenesis, FASN plays a role in growth and survival rather than acting within the energy storage pathways. Here, the function of FASN during early embryonic development was studied using its specific inhibitor, C75. We found that the presence of the inhibitor reduced blastocyst hatching. FASN inhibition decreased Cpt1 expression, leading to a reduction in mitochondria numbers and ATP content. This inhibition of FASN resulted in the down-regulation of the AKT pathway, thereby triggering apoptosis through the activation of the p53 pathway...
2017: PloS One
https://www.readbyqxmd.com/read/28106999/flux-versus-hydrothermal-growth-polymorphism-of-a2-uo2-si2o6-a-rb-cs
#14
Gregory Morrison, Mark D Smith, Hans-Conrad Zur Loye
Single crystals of two new uranyl silicates were grown from mixed alkali fluoride/alkali chloride fluxes. Polymorphism is observed in Cs2(UO2)Si2O6, where hydrothermal conditions lead to the α polymorph and flux growth favors the β polymorph. Rb2(UO2)Si2O6 crystallizes in a monoclinic distortion of the α-Cs2(UO2)Si2O6 structure type with space group I2/a and lattice parameters a = 14.9932(5) Å, b = 14.8032(5) Å, c = 16.2377(9) Å, and β = 90.7220(10)°. β-Cs2(UO2)Si2O6 constitutes a new polymorph of Cs2(UO2)Si2O6 and crystallizes in the monoclinic space group C2 with lattice parameters a = 12...
January 20, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28106380/role-of-sputter-deposition-rate-in-tailoring-nanogranular-gold-structures-on-polymer-surfaces
#15
Matthias Schwartzkopf, Alexander Hinz, Oleksandr Polonskyi, Thomas Strunskus, Franziska Carina Löhrer, Volker Körstgens, Peter Muller-Buschbaum, Franz Faupel, Stephan V Roth
The reproducible low-cost fabrication of functional polymer-metal-interfaces via self-assembly is of crucial importance in organic electronics and organic photovoltaics. In particular, submonolayer and nanogranular systems expose highly interesting electrical, plasmonic and catalytical properties. The exploitation of their great potential requires tailoring of the structure on the nanometer scale and below. In order to obtain full control over the complex nanostructural evolution at the polymer-metal interface, we monitor the evolution of the metallic layer morphology with in situ time-resolved GISAXS during sputter deposition...
January 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28106248/bacterial-impregnation-of-mineral-fertilizers-improves-yield-and-nutrient-use-efficiency-of-wheat
#16
Shakeel Ahmad, Muhammad Imran, Sabir Hussain, Sajid Mahmood, Azhar Hussain, Muhammad Hasnain
BACKGROUND: The fertilizer use efficiency (FUE) of agricultural crops is generally low which results in poor crop yields and low economic benefits to the farmers. Among the various approaches used to enhance FUE, impregnation of mineral fertilizers with plant growth promoting bacteria (PGPB) is attracting a worldwide attention. The present study was aimed to improve growth, yield and nutrient use efficiency of wheat by bacterially impregnated mineral fertilizers. RESULTS: Results of the pot study revealed that impregnation of diammonium phosphate (DAP) and urea with PGPB was helpful in enhancing the growth, yield, photosynthetic rate, nitrogen use efficiency (NUE) and phosphorus use efficiency (PUE) of wheat...
January 20, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28106198/ten-gram-scale-sic-sio2-nanowires-high-yield-synthesis-towards-industrialization-in-situ-growth-mechanism-and-their-peculiar-photoluminescence-and-electromagnetic-wave-absorption-properties
#17
Z J Li, H Y Yu, G Y Song, J Zhao, H Zhang, M Zhang, A L Meng, Q D Li
SiC@SiO2 nanowires, as a functional nanocomposite, have attracted widespread attention due to their fascinating performance and broad application prospect. However, the low-cost, high yield preparation of large-scale SiC@SiO2 nanowires is still a bottleneck, which hinders their industrial application. Herein, a carbothermal reduction strategy has been developed to synthesize SiC@SiO2 nanowires, which breaks through the handicap of the traditional growth pattern that uses the aid of a substrate. Systematic characterization results illustrate that the yield of the as-obtained products greatly depends on the heating rate, and ten-gram scale SiC@SiO2 nanowires (∼27...
January 20, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28106038/the-shape-of-telephone-cord-blisters
#18
Yong Ni, Senjiang Yu, Hongyuan Jiang, Linghui He
Formation of telephone cord blisters as a result of buckling delamination is widely observed in many compressed film-substrate systems. Here we report a universal morphological feature of such blisters characterized by their sequential sectional profiles exhibiting a butterfly shape using atomic force microscopy. Two kinds of buckle morphologies, light and heavy telephone cord blisters, are observed and differentiated by measurable geometrical parameters. Based on the Föppl-von Kármán plate theory, the observed three-dimensional features of the telephone cord blister are predicted by the proposed approximate analytical model and simulation...
January 20, 2017: Nature Communications
https://www.readbyqxmd.com/read/28105510/diversity-and-distribution-of-thermophilic-bacteria-in-hot-springs-of-pakistan
#19
Arshia Amin, Iftikhar Ahmed, Nimaichand Salam, Byung-Yong Kim, Dharmesh Singh, Xiao-Yang Zhi, Min Xiao, Wen-Jun Li
Chilas and Hunza areas, located in the Main Mantle Thrust and Main Karakoram Thrust of the Himalayas, host a range of geochemically diverse hot springs. This Himalayan geothermal region encompassed hot springs ranging in temperature from 60 to 95 °C, in pH from 6.2 to 9.4, and in mineralogy from bicarbonates (Tato Field), sulfates (Tatta Pani) to mixed type (Murtazaabad). Microbial community structures in these geothermal springs remained largely unexplored to date. In this study, we report a comprehensive, culture-independent survey of microbial communities in nine samples from these geothermal fields by employing a bar-coded pyrosequencing technique...
January 19, 2017: Microbial Ecology
https://www.readbyqxmd.com/read/28105202/increased-expression-of-urotensin-ii-is-associated-with-poor-prognosis-in-hepatocellular-carcinoma
#20
Dian-Gang Liu, Jing Chen, Hong-Xia Wang, Bao-Xin Li
Urotensin II (UII) and the urotensin II receptor (UT) exhibit mitogenic effects on tumor growth. Our previous study demonstrated that the UII/UT system is upregulated in hepatocellular carcinoma (HCC) and may enhance the proliferation of human hepatoma cells. However, the clinical significance of UII/UT expression in HCC remains unclear. The present study assessed UII messenger RNA (mRNA) expression in 129 surgical specimens obtained from HCC patients using reverse transcription quantitative-polymerase chain reaction...
December 2016: Oncology Letters
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