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https://www.readbyqxmd.com/read/28549378/multi-layer-snse-nanoflake-field-effect-transistors-with-low-resistance-au-ohmic-contacts
#1
Sang-Hyeok Cho, Kwanghee Cho, No-Won Park, Soonyong Park, Jung-Hyuk Koh, Sang-Kwon Lee
We report p-type tin monoselenide (SnSe) single crystals, grown in double-sealed quartz ampoules using a modified Bridgman technique at 920 °C. X-ray powder diffraction (XRD) and energy dispersive X-ray spectroscopy (EDX) measurements clearly confirm that the grown SnSe consists of single-crystal SnSe. Electrical transport of multi-layer SnSe nanoflakes, which were prepared by exfoliation from bulk single crystals, was conducted using back-gated field-effect transistor (FET) structures with Au and Ti contacts on SiO2/Si substrates, revealing that multi-layer SnSe nanoflakes exhibit p-type semiconductor characteristics owing to the Sn vacancies on the surfaces of SnSe nanoflakes...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28549375/interfacial-electrical-and-band-alignment-characteristics-of-hfo2-ge-stacks-with-in-situ-formed-sio2-interlayer-by-plasma-enhanced-atomic-layer-deposition
#2
Yan-Qiang Cao, Bing Wu, Di Wu, Ai-Dong Li
In situ-formed SiO2 was introduced into HfO2 gate dielectrics on Ge substrate as interlayer by plasma-enhanced atomic layer deposition (PEALD). The interfacial, electrical, and band alignment characteristics of the HfO2/SiO2 high-k gate dielectric stacks on Ge have been well investigated. It has been demonstrated that Si-O-Ge interlayer is formed on Ge surface during the in situ PEALD SiO2 deposition process. This interlayer shows fantastic thermal stability during annealing without obvious Hf-silicates formation...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28549353/crowding-visual-awareness-and-their-respective-neural-loci
#3
Kilho Shin, Susana T L Chung, Bosco S Tjan
In peripheral vision, object identification can be impeded when a target object is flanked by other objects. This phenomenon of crowding has been attributed to basic processes associated with image encoding by the visual system, but the neural origin of crowding is not known. Determining whether crowding depends on subjective awareness of the flankers can provide information on the neural origin of crowding. However, recent studies that manipulated flanker awareness have yielded conflicting results. In the current study, we suppressed flanker awareness with two methods: interocular suppression (IOS) and adaptation-induced blindness (AIB)...
May 1, 2017: Journal of Vision
https://www.readbyqxmd.com/read/28549350/an-anti-cancer-wxxxe-containing-azurin-polypeptide-inhibits-rac1-dependent-stat3-and-erk-gsk-3%C3%AE-signaling-in-breast-cancer-cells
#4
Zhe Zhang, Zhiyong Luo, Wenpu Min, Lin Zhang, Yaqun Wu, Xiaopeng Hu
In our previous study, we characterized a mycoplasmal small GTPase-like polypeptide of 240 amino acids that possesses an N-terminal WVLGE sequence. The N-terminal WVLGE sequence promotes activation of Rac1 and subsequent host cancer cell proliferation. To investigate the function of the WxxxE motif in the interaction with Rac1 and host tumor progression, we synthesized a 35-amino acid WVLGE-containing polypeptide derived from a cell-penetrating peptide derived from the azurin protein. We verified that the WVLGE-containing polypeptide targeted MCF-7 cells rather than MCF-10A cells...
May 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/28549349/synchronous-splenectomy-and-hepatectomy-for-patients-with-small-hepatocellular-carcinoma-and-pathological-spleen-neutrophil-to-lymphocyte-ratio-changes-can-predict-the-prognosis
#5
Xiaoyun Zhang, Chuan Li, Tianfu Wen, Wei Peng, Lunan Yan, Bo Li, Jiayin Yang, Wentao Wang, Mingqing Xu, Yong Zeng
BACKGROUND: Treatments about small hepatocellular carcinoma (HCC) and hypersplenism associated with good hepatic reserve are not well established. The aim of this study was to investigate the outcome of synchronous hepatectomy and splenectomy for those patients. STUDY DESIGN: Splenomegaly and hypersplenism were defined as a pathological spleen. Seven hundred fifty-six patients with small HCC (381 with a pathological spleen, 375 without a pathological spleen) were divided into three groups...
May 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/28549341/cdk1-interacts-with-iaspp-to-regulate-colorectal-cancer-cell-proliferation-through-p53-pathway
#6
Wei Gan, Hua Zhao, Tiegang Li, Kuijie Liu, Jiangsheng Huang
CDK1 (cyclin-dependent kinase 1) is a critical regulator of the G2-M checkpoint. CDK1 is considered a possible target for cancer treatment. In addition to CDK1, iASPP plays essential role in maintaining cancer cell proliferation. In the present study, we monitored the expression of CDK1 and iASPP at mRNA and protein levels in CRC tissues and cell lines; we also predicted that iASPP protein might interact with CDK1 protein. By performing GST pull-down assay and Co-IP assay, we confirmed the interaction of CDK1 and iASPP protein...
May 11, 2017: Oncotarget
https://www.readbyqxmd.com/read/28549335/microstructural-alterations-of-white-matter-in-juvenile-myoclonic-epilepsy
#7
Jinnan Gong, Xuebin Chang, Sisi Jiang, Benjamin Klugah-Brown, Song Tan, Dezhong Yao, Cheng Luo
Juvenile myoclonic epilepsy (JME) is a common type of idiopathic generalized epilepsy that is characterized by myoclonic jerks of the upper limbs and generalized tonic-clonic seizures. Frontal cognitive dysfunctions and abnormal coupling of the thalamocortical system have been found in neuropsychological and neuroimaging studies. This study intended to explore white matter (WM) measurement changes in JME using MRI. Twenty-six patients with JME and 25 healthy controls (HC) were recruited for the acquisition of diffusion MRI and structural MRI data...
April 4, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/28549331/does-self-efficacy-causally-influence-initial-smoking-cessation-an-experimental-study
#8
William G Shadel, Steven C Martino, Claude Setodji, Daniel Cervone, Katie Witkiewitz
Self-efficacy has been associated with smoking cessation outcomes in many correlational research studies, but strong causal inferences are lacking. This study tested whether self-efficacy affects initial smoking cessation in a laboratory experiment, which will allow for stronger causal inferences in this domain of inquiry. Participants (n=103 motivated adult smokers) were provided with brief cessation treatment over three days in preparation for quitting on a target quit day (TQD). In addition, participants were randomized to one of two standard self-efficacy manipulations in the form of bogus feedback about their chances of quitting smoking...
May 20, 2017: Addictive Behaviors
https://www.readbyqxmd.com/read/28549321/studies-on-free-radical-scavenging-cancer-cell-antiproliferation-and-calf-thymus-dna-interaction-of-schiff-bases
#9
Cleiton M da Silva, Marina M Silva, Fabiano S Reis, Ana Lúcia T G Ruiz, João E de Carvalho, Josué C C Santos, Isis M Figueiredo, Rosemeire B Alves, Luzia V Modolo, Ângelo de Fátima
Thirty-nine Schiff bases were synthesized by performing microwave-assisted condensation of the corresponding aldehydes and aromatic amines. Their reactive nitrogen species (RNS) scavenging activity and inhibitory effects against cancer cell growth were then subsequently investigated. Additionally, the interaction between the calf thymus DNA (ctDNA) and selected Schiff bases was evaluated using fluorescence spectroscopy, and their binding parameters were determined. The yields of the various compounds ranged from moderate to excellent (43-99%) after only a 2-min reaction...
May 17, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28549320/light-emission-miracle-in-the-sea-and-preeminent-applications-of-bioluminescence-in-recent-new-biotechnology
#10
Sana Sharifian, Ahmad Homaei, Roohullah Hemmati, Khosro Khajeh
Bioluminescence is referred to the light emission by a living organism due to a specific biochemical reaction. This interesting feature of the organisms could highly influences behavioral and ecosystem dynamics. Luminescence, mostly observed in marine species, is generally higher in deep-living genera than in benthic or shallow organisms. However, among creatures living in land, fireflies, beetles, springtails and fungi have shown some bioluminescent activities. Classically, the emission of light is catalyzed by luciferase from a substrate...
May 17, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28549316/method-for-assessment-of-stormwater-treatment-facilities-synthetic-road-runoff-addition-including-micro-pollutants-and-tracer
#11
Karin Cederkvist, Marina B Jensen, Peter E Holm
Stormwater treatment facilities (STFs) are becoming increasingly widespread but knowledge on their performance is limited. This is due to difficulties in obtaining representative samples during storm events and documenting removal of the broad range of contaminants found in stormwater runoff. This paper presents a method to evaluate STFs by addition of synthetic runoff with representative concentrations of contaminant species, including the use of tracer for correction of removal rates for losses not caused by the STF...
May 23, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28549313/the-persistent-shadow-of-suicide-ideation-and-attempts-in-a-high-risk-group-of-psychiatric-patients-a-focus-for-intervention
#12
Jane G Tillman, A Jill Clemence, Robyn Cree, Katie C Lewis, Jennifer L Stevens, David Reiss
OBJECTIVE: Patients with a history of suicidal ideation or attempts, especially if they have serious psychopathology with repeated hospitalizations, are burdened by ongoing risk for suicide. We studied this high-risk group to assess their psychological status following their most recent suicide attempt, in contrast to equally ill patients without a suicide history. Further, among suicidal patients, we compared those with only ideation, with a non-medically serious suicide attempt and with medically serious suicide attempts...
May 18, 2017: Comprehensive Psychiatry
https://www.readbyqxmd.com/read/28549311/reaction-of-diazepam-and-related-benzodiazepines-with-chlorine-kinetics-transformation-products-and-in-silico-toxicological-assessment
#13
Inmaculada Carpinteiro, Rosario Rodil, José Benito Quintana, Rafael Cela
In this work, the reaction of four benzodiazepines (diazepam, oxazepam, nordazepam and temazepam) during water chlorination was studied by means of liquid chromatography-quadrupole-time of flight-mass spectrometry (LC-QTOF-MS). For those compounds that showed a significant degradation, i.e. diazepam, oxazepam and nordazepam, parameters affecting to the reaction kinetics (pH, chlorine and bromide level) were studied in detail and transformation products were tentatively identified. The oxidation reactions followed pseudofirst-order kinetics with rate constants in the range of 1...
May 3, 2017: Water Research
https://www.readbyqxmd.com/read/28549306/pretreatment-of-corn-stover-by-solid-acid-for-d-lactic-acid-fermentation
#14
Xiqing Wang, Gang Wang, Xiaoxiao Yu, Huan Chen, Yang Sun, Guang Chen
Solid acid is a new acid that is safe and green, which has been widely used in the fields of acid pickling. In this study, we adopted solid acid to pretreat corn stover and used the pretreated corn stover in the fermentation of d-lactic acid. Finally, we obtained optimal conditions for the pretreatment of corn stover by solid acid: digestion temperature of 120°C, digestion time of 80min, and solid acid concentration of 1.5%. Then adding cellulase of 30FPU/g, the conversion rate of glucose reached 71.06% after enzymatic hydrolysis for 72h...
April 27, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28549295/structural-characterization-of-astaxanthin-aggregates-as-revealed-by-analysis-and-simulation-of-optical-spectra
#15
Liping Lu, Taoping Hu, Zhigang Xu
Carotenoids can self-assemble in hydrated polar solvents to form J- or H-type aggregates, inducing dramatic changes in photophysical properties. Here, we measured absorption and emission spectra of astaxanthin in ethanol-water solution using ultraviolet-visible and fluorescence spectrometers. Two types of aggregates were distinguished in mixed solution at different water contents by absorption spectra. After addition of water, all probed samples immediately formed H-aggregates with maximum blue shift of 31nm...
May 15, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28549288/ecological-effects-of-soil-properties-and-metal-concentrations-on-the-composition-and-diversity-of-microbial-communities-associated-with-land-use-patterns-in-an-electronic-waste-recycling-region
#16
Wencheng Wu, Changxun Dong, Jiahui Wu, Xiaowen Liu, Yingxin Wu, Xianbin Chen, Shixiao Yu
Soil microbes play vital roles in ecosystem functions, and soil microbial communities may be strongly structured by land use patterns associated with electronic waste (e-waste) recycling activities, which can increase the heavy metal concentration in soils. In this study, a suite of soils from five land use types (paddy field, vegetable field, dry field, forest field, and e-waste recycling site) were collected in Longtang Town, Guangdong Province, South China. Soil physicochemical properties and heavy metal concentrations were measured, and the indigenous microbial assemblages were profiled using 16S rRNA high-throughput sequencing and clone library analyses...
May 23, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28549285/environmental-response-to-long-term-mariculture-activities-in-the-weihai-coastal-area-china
#17
Hongmei Li, Xiaomin Li, Qiang Li, Ying Liu, Jide Song, Yongyu Zhang
The environmental impacts of rapid expansion of mariculture have garnered worldwide attention. China is currently one of the largest countries to engage in this practice. In this study, a representative mariculture zone, the Weihai coastal area in China, was explored to determine the temporal variations in regional nutrients, N/P ratio, dissolved oxygen (DO), pH, chlorophyll a (Chl-a), and cellular abundance of diatoms and dinoflagellates in response to the rapid growth in mariculture activities between 2006 and 2014...
May 23, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28549272/acute-toxicity-of-emerging-atmospheric-pollutants-from-wood-lignin-due-to-biomass-burning
#18
Maryline Pflieger, Ana Kroflič
Guaiacol (2-methoxyphenol) is an important atmospheric pollutant. It is the major component of wood lignin and is essentially emitted to the atmosphere during biomass burning. Its aging in the tropospheric aqueous phase leads to the generation of the following ring-retaining transformation products, also during nighttime: 4-nitroguaiacol, 6-nitroguaiacol, and dinitroguaiacol. This study presents the first toxicological data of guaiacol and its nitro derivatives and reveals their harmful potential for the ecosystem...
May 15, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28549268/modulation-of-hpa-axis-response-to-social-stress-in-schizophrenia-by-childhood-trauma
#19
Claudia Lange, Christian G Huber, Daniela Fröhlich, Stefan Borgwardt, Undine E Lang, Marc Walter
HPA axis functioning plays an important role in the etiology of schizophrenia spectrum disorders (SSD). However, only few studies have examined HPA axis responsivity to psychosocial stress in SSD, and results are heterogeneous. Furthermore, childhood trauma is known to influence psychopathology and treatment outcome in SSD, but studies on the influence of childhood trauma on stress related HPA axis activity are missing. The purpose of this study was to investigate cortisol response to a psychosocial stress challenge in SSD patients, and to examine its association with severity of childhood trauma...
May 20, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28549267/the-construction-of-a-novel-nucleic-acids-detection-microplatform-based-on-the-nset-for-one-step-detecting-tk1-dna-and-microrna-21
#20
Jian Zhang, Qian Zhao, Yudong Wu, Bo Zhang, Weipan Peng, Jiafang Piao, Yurui Zhou, Weichen Gao, Xiaoqun Gong, Jin Chang
Microbeads-based microchip technology has become the potential for a new generation of nucleic acids detection in a high-throughput and sensitive manner. However the specificity and operational complexity limit the microchip applied in nucleic acids detection. Herein, in this work, we designed a kind of gold-nanoparticles coated polystyrene microbeads as microplatform conjugating with the molecular beacons as probes. Due to the nanoparticle surface energy transfer of gold-nanoparticles, the fluorescence of dye on one end of molecular beacons was effectively quenched...
May 23, 2017: Biosensors & Bioelectronics
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