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https://www.readbyqxmd.com/read/27933719/depth-profiling-cross-linked-poly-methyl-methacrylate-films-a-tof-sims-approach
#1
Soheila Naderi-Gohar, Kevin M H Huang, Yiliang Wu, Woon Ming Lau, Heng-Yong Nie
RATIONALE: In order to determine the degree of cross-linking on the surface and its variations in a nanometer-scale depth of organic materials, we developed an approach based on time-of-flight secondary ion mass spectrometry (TOF-SIMS), which provides rich chemical information in the form of fragment ions. TOF-SIMS is extremely surface sensitive and capable of depth profiling with the use of a sputter ion beam to remove controllable amounts of substance. METHODS: Poly(methyl methacrylate) (PMMA) films spin-coated on a Si substrate were cross-linked using a recently developed, surface sensitive, hyperthermal hydrogen projectile bombardment technique...
December 9, 2016: Rapid Communications in Mass Spectrometry: RCM
https://www.readbyqxmd.com/read/27933650/up-regulation-of-microrna-133a-inhibits-the-mek-erk-signaling-pathway-to-promote-cell-apoptosis-and-enhance-radio-sensitivity-by-targeting-egfr-in-esophageal-cancer-in-vivo-and-in-vitro
#2
Qing-Shan Yang, Li-Peng Jiang, Chun-Yan He, Yu-Na Tong, Yuan-Yuan Liu
This study aims to explore how microRNA-133a (miR-133a) affects cell apoptosis and radio-sensitivity by targeting EGFR via regulating MEK/ERK pathway in esophageal cancer (EC). A total of 358 EC patients were selected and assigned into the resistant and sensitive groups. Human EC KYSE 150 cell line was assigned into the blank, negative control (NC), miR-133a mimic, miR-133a inhibitors, si-EGFR, miR-133a inhibitors + si-EGFR groups after transfection. MiR-133a and EGFR mRNA expressions were detected by qRT-PCR and EGFR, MEK/ERK pathway-related protein expressions were detected by Western blotting...
December 8, 2016: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/27933114/instantaneous-formation-of-siox-nanocomposite-for-high-capacity-lithium-ion-batteries-by-enhanced-disproportionation-reaction-during-plasma-spray-physical-vapor-deposition
#3
Tohru Tashiro, Masashi Dougakiuchi, Makoto Kambara
Nanocomposite SiOx particles have been produced by a single step plasma spray physical vapor deposition (PS-PVD) through rapid condensation of SiO vapors and the subsequent disproportionation reaction. Core-shell nanoparticles, in which 15 nm crystalline Si is embedded within the amorphous SiOx matrix, form under typical PS-PVD conditions, while 10 nm amorphous particles are formed when processed with an increased degree of non-equilibrium effect. Addition of CH4 promotes reduction in the oxygen content x of SiO x , and thereby increases the Si volume in a nanocomposite particle...
2016: Science and Technology of Advanced Materials
https://www.readbyqxmd.com/read/27932890/high-expression-of-hmga2-predicts-poor-survival-in-patients-with-clear-cell-renal-cell-carcinoma
#4
Ning Na, Tujie Si, Zhengyu Huang, Bin Miao, Liangqing Hong, Heng Li, Jiang Qiu, Jianguang Qiu
High-mobility group AT-hook 2 (HMGA2) is involved in a wide spectrum of biological processes and is upregulated in several tumors, but its role in renal carcinoma remains unclear. The aim of this study was to examine the expression of HMGA2 and its relationship to the overall survival (OS) of patients with non-metastatic clear cell renal cell carcinoma (ccRCC) following surgery. The expression of HMGA2 was evaluated retrospectively by immunohistochemistry (IHC) in 162 patients with ccRCC who underwent nephrectomy in 2003 and 2004...
2016: OncoTargets and Therapy
https://www.readbyqxmd.com/read/27931311/cryopreservation-of-cynomolgus-macaque-macaca-fascicularis-sperm-by-using-a-commercial-egg-yolkfree-freezing-medium
#5
Yaping Yan, Lei Ao, Hong Wang, Yanchao Duan, Shaohui Chang, Bingbing Chen, Dalong Zhi, Sujuan Li, Yuyu Niu, Weizhi Ji, Wei Si
Conventional TRISegg yolk (TEY) freezing medium for the cryopreservation of NHP sperm has the risk of contamination due to widespread zoonotic diseases. This study was aimed at determining the optimal glycerol concentration, freezing rate, and holding time in liquid N2 vapor for the cryopreservation of cynomolgus macaque sperm by using a commercial egg-yolkfree freezing medium (SC medium) designed for human sperm cryopreservation. Sperm motility and acrosomal integrity after freezing were assessed. Sperm in SC medium (dilution ratio, 3:1) frozen at cooling rates of 67 and 183C/min in liquid N2 vapor showed higher post-thaw motility than did samples frozen at 435C/min...
November 2016: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/27931116/a-new-diphenyl-ether-derivative-from-mirabilis-himalaica
#6
Si-Yu Zhou, Guo-Wei Wang, Yan-Lin Zou, Li-Qing Deng, Ming-Xu Liu, Zhi-Hua Liao, Xiao-Zhong Lan, Min Chen
One new compound, himalain A (1), together with 12 known compounds were isolated from Mirabilis himalaica. Their structures were determined by spectroscopic methods, including 2D NMR techniques, and the absolute configuration of the 1,2-diol moiety in 1 was defined through Riguera's method. All isolated compounds were tested for their cytotoxic and antibacterial activities.
December 8, 2016: Natural Product Research
https://www.readbyqxmd.com/read/27930947/ginseng-and-obesity-observations-and-understanding-in-cultured-cells-animals-and-humans
#7
REVIEW
Longyun Zhang, Carlos Virgous, Hongwei Si
Ginseng, a traditional medical herb, has been reported having beneficial effects in fatigue, heart diseases, diabetes, immune function and erectile dysfunction. In recent years, increasing investigations have been conducted on ginseng in preventing and treating of obesity, one of the major worldwide escalating public health concerns. However, the effect and the relevant mechanisms behind how ginseng works as an antiobesity treatment are still controversial. In this review, we briefly discussed the chemical structures, metabolism and pharmacokinetics of ginseng and its major bioactive components ginsenosides...
November 23, 2016: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/27930917/love-mode-surface-acoustic-wave-devices-based-on-multilayers-of-teo2-zno-112%C3%A2-0-si-100-with-high-sensitivity-and-temperature-stability
#8
Jing-Ting Luo, Ao-Jie Quan, Guang-Xing Liang, Zhuang-Hao Zheng, Sami Ramadan, Chen Fu, Hong-Lang Li, Yong-Qing Fu
A multilayer structure of TeO2/interdigital transducers (IDTs)/ZnO(112¯0)/Si(100) was proposed and investigated to achieve both high sensitivity and temperature-stability for bio-sensing applications. Dispersions of phase velocities, electromechanical coupling coefficients K(2), temperature coefficient of delay (TCD) and sensitivity in the multilayer structures were simulated as functions of normalized thicknesses of ZnO (hZnO/λ) and TeO2 (hTeO2/λ) films. The fundamental mode of Love mode (LM) - surface acoustic wave (SAW) shows a larger value of K(2) and higher sensitivity compared with those of the first mode...
November 25, 2016: Ultrasonics
https://www.readbyqxmd.com/read/27930576/hyperthyroidism-secondary-to-hysterosalpingography-an-extremely-rare-complication-a-case-report
#9
Guotao Ma, Rui Mao, Haixin Zhai
RATIONALE: Hysterosalpingography (HSG), a standard procedure for the evaluation of women with infertility and repetitive pregnancy loss, is associated with complications such as uterine perforation, infection, allergic reactions, syncope, hemorrhage and shock, and pulmonary or retinal embolus. However, hyperthyroidism has not been reported as one of its complications. PATIENT CONCERNS AND DIAGNOSES: We report the case of a 33-year-old euthyroid woman who presented to our hospital with palpitation, hand tremor, fatigue, and excessive sweating after HSG...
December 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27930331/concentrator-photovoltaic-module-architectures-with-capabilities-for-capture-and-conversion-of-full-global-solar-radiation
#10
Kyu-Tae Lee, Yuan Yao, Junwen He, Brent Fisher, Xing Sheng, Matthew Lumb, Lu Xu, Mikayla A Anderson, David Scheiman, Seungyong Han, Yongseon Kang, Abdurrahman Gumus, Rabab R Bahabry, Jung Woo Lee, Ungyu Paik, Noah D Bronstein, A Paul Alivisatos, Matthew Meitl, Scott Burroughs, Muhammad Mustafa Hussain, Jeong Chul Lee, Ralph G Nuzzo, John A Rogers
Emerging classes of concentrator photovoltaic (CPV) modules reach efficiencies that are far greater than those of even the highest performance flat-plate PV technologies, with architectures that have the potential to provide the lowest cost of energy in locations with high direct normal irradiance (DNI). A disadvantage is their inability to effectively use diffuse sunlight, thereby constraining widespread geographic deployment and limiting performance even under the most favorable DNI conditions. This study introduces a module design that integrates capabilities in flat-plate PV directly with the most sophisticated CPV technologies, for capture of both direct and diffuse sunlight, thereby achieving efficiency in PV conversion of the global solar radiation...
December 5, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27929514/evaluation-of-kidney-motion-and-target-localization-in-abdominal-sbrt-patients
#11
Marcus Sonier, William Chu, Nafisha Lalani, Darby Erler, Patrick Cheung, Renee Korol
The purpose of this study was to evaluate bilateral kidney and target translational/rotational intrafraction motion during stereotactic body radiation therapy treatment delivery of primary renal cell carcinoma and oligometastatic adrenal lesions for patients immobilized in the Elekta BodyFIX system. Bilateral kidney motion was assessed at midplane for 30 patients immobilized in a full-body dual-vacuum-cushion system with two patients immobilized via abdominal compression. Intrafraction motion was assessed for 15 patients using kilovoltage cone-beam computed tomography (kV-CBCT) datasets (n = 151) correlated to the planning CT...
November 8, 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/27929460/the-synthesis-of-sn10-si-sime3-3-4-2-using-a-metastable-sn-i-halide-solution-synthesized-via-a-co-condensation-technique
#12
Mareike Binder, Claudio Schrenk, Andreas Schnepf
The number of well-characterized metalloid tin clusters, synthesized by applying the disproportionation of a metastable Sn(I) halide in the presence of a sterically demanding ligand, has increased in recent years. The metastable Sn(I) halide is synthesized at "outer space conditions" via the preparative co-condensation technique. Thereby, the subhalide is synthesized in an oven at high temperatures, around 1,300 °C, and at reduced pressure by the reaction of elemental tin with hydrogen halide gas (e.g., HCl)...
November 28, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/27929184/a-comparison-of-rs4-type-resistant-starch-to-rs2-type-resistant-starch-in-suppressing-oxidative-stress-in-high-fat-diet-induced-obese-rats
#13
Xu Si, Zhongkai Zhou, Padraig Strappe, Chris Blanchard
The anti-obesity effects of two types of resistant starch (RS) in high-fat-diet-induced obese rats were investigated. The serum triglycerides, total cholesterol and malondialdehyde concentrations were significantly reduced, and the total antioxidant capacity, superoxide dismutase levels and glutathione peroxidase activity were increased by RS2 and RS4 consumption compared to the obesity group. A significant reduction in the serum glucose level and elevations in hepatic lipid metabolic enzyme activities were observed only for RS4 administration...
December 8, 2016: Food & Function
https://www.readbyqxmd.com/read/27929167/nanostructure-of-the-h-terminated-p-si-111-ionic-liquid-interface-and-the-effect-of-added-lithium-salt
#14
Viktor Hoffmann, Abhishek Lahiri, Natalia Borisenko, Timo Carstens, Giridhar Pulletikurthi, Andriy Borodin, Rob Atkin, Frank Endres
Ionic liquids are potential electrolytes for safe lithium-ion batteries (LIB). Recent research has probed the use of silicon as an anode material for LIB with various electrolytes. However, the nanostructure of the ionic liquid/Si interface is unknown. The present communication probes the hydrogen terminated p-Si(111) interface using atomic force microscopy (AFM) in 1-ethyl-3-methylimidazolium bis(trifluoromethlysulfonyl)amide ([EMIm]TFSA) and 1-butyl-1-methylpyrrolidinium bis(trifluoromethlysulfonyl)amide ([Py1,4]TFSA)...
December 8, 2016: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/27929082/a-retrospective-study-of-pyogenic-liver-abscess-focusing-on-klebsiella-pneumoniae-as-a-primary-pathogen-in-china-from-1994-to-2015
#15
Yun Qian, Chi Chun Wong, Sanchuan Lai, Huarong Chen, Xingkang He, Leimin Sun, Jiaguo Wu, Jiancang Zhou, Jun Yu, Weili Liu, Daoyang Zhou, Jianmin Si
Pyogenic liver abscess (PLA) is a common intra-abdominal infection in adults. In this study, we aim to explore demographic and clinical characteristics of PLA focusing on Klebsiella pneumoniae (K. pneumoniae) induced PLA (KP-PLA) in mainland China. A retrospective review of medical records from all patients with KP-PLA admitted to a tertiary teaching hospital over a 21-year period (1994-2015) was performed. Among 296 PLA cases with confirmed culture-positive data, K. pneumoniae was revealed as the predominant pathogen (n = 189, 63...
December 8, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27929055/in-situ-size-sorting-in-cvd-synthesis-of-si-microspheres
#16
M Garín, R Fenollosa, L Kowalski
Silicon microspheres produced in gas-phase by hot-wall CVD offer unique quality in terms of sphericity, surface smoothness, and size. However, the spheres produced are polydisperse in size, which typically range from 0.5 μm to 5 μm. In this work we show through experiments and calculations that thermophoretic forces arising from strong temperature gradients inside the reactor volume effectively sort the particles in size along the reactor. These temperature gradients are shown to be produced by a convective gas flow...
December 8, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27928783/radiation-induced-enhancement-of-hydrogen-influence-on-luminescent-properties-of-nc-si-sio2-structures
#17
Igor Lisovskyy, Mariia Voitovych, Volodymyr Litovchenko, Vasyl Voitovych, Iurii Nasieka, Viktor Bratus
Using photo-luminescence, infrared spectroscopy, and electron spin resonance technique, the silicon dioxide films with embedded silicon nanocrystals (nc-Si/SiO2 structures) have been investigated after γ-irradiation with the dose 2 × 10(7) rad and subsequent annealing at 450 °C in hydrogen ambient. For the first time, it was shown that such a radiation-thermal treatment results in significant increase of the luminescence intensity, in a red shift of the photoluminescence spectra, and in disappearance of the electron-spin resonance signal related to silicon broken bonds...
December 2016: Nanoscale Research Letters
https://www.readbyqxmd.com/read/27928493/putting-an-ultrahigh-concentration-of-amine-groups-into-a-metal-organic-framework-for-co2-capture-at-low-pressures
#18
Pei-Qin Liao, Xun-Wei Chen, Si-Yang Liu, Xu-Yu Li, Yan-Tong Xu, Minni Tang, Zebao Rui, Hongbing Ji, Jie-Peng Zhang, Xiao-Ming Chen
Tremendous efforts have been devoted to increasing the CO2 capture performance of porous materials, especially for low CO2 concentration environments. Here, we report that hydrazine can be used as a diamine short enough to functionalize the small-pore metal-organic framework [Mg2(dobdc)] (H4dobdc = 2,5-dihydroxyl-1,4-benzenedicarboxylic acid). By virtue of the ultrahigh concentration of free amine groups (6.01 mmol g(-1) or 7.08 mmol cm(-3)) capable of reversible carbamic acid formation, the new material [Mg2(dobdc)(N2H4)1...
October 19, 2016: Chemical Science
https://www.readbyqxmd.com/read/27928447/mortality-prognostic-factors-in-acute-pancreatitis
#19
Popa Cc, Badiu Dc, Rusu Oc, Grigorean Vt, Neagu Si, Strugaru Cr
Background: The aim of the study was to present the biological prognostic factors of mortality in patients with acute pancreatitis. Methods: Several usual laboratory values were monitored: glucose, urea, partial pressure of oxygen, WBC count, hemoglobin, total bilirubin, and cholesterol. A statistical analysis was performed by using ROC curves and AUC interpretation. Results: The overall mortality rate was 21.1% and was different depending on the severity of the disease. Only 2.22% of the patients with a mild disease died, as opposed to 45...
October 2016: Journal of Medicine and Life
https://www.readbyqxmd.com/read/27928227/baicalin-and-geniposide-inhibit-the-development-of-atherosclerosis-by-increasing-wnt1-and-inhibiting-dickkopf-related-protein-1-expression
#20
Bin Wang, Ping-Ping Liao, Li-Hua Liu, Xin Fang, Wei Li, Si-Ming Guan
BACKGROUND: Our previous study showed that the combined Chinese herbs containing scutellaria baicalensis georgi and gardenia jasminoids ellis inhibited atherosclerosis. In this study, we sought to determine if baicalin and geniposide could inhibit atherosclerosis through Wnt1 and dickkopf-related protein-1 (DKK1). METHODS: The wild-type and ApoE(-/-) mice were treated with baicalin, geniposide, and baicalin plus geniposide daily by gavage for 12 weeks. Blood lipid levels were measured with an automatic biochemistry analyzer...
October 2016: Journal of Geriatric Cardiology: JGC
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