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https://www.readbyqxmd.com/read/28927166/experimental-evaluation-of-respirable-dust-and-crystalline-silica-controls-during-simulated-performance-of-stone-countertop-fabrication-tasks-with-powered-hand-tools
#1
David L Johnson, Margaret L Phillips, Chaolong Qi, Anthony T Van, Danielle A Hawley
Objectives: Workers who fabricate stone countertops using hand tools are at risk of silicosis from overexposure to respirable crystalline silica. This study explored the efficacy of simple engineering controls that can be used for dust suppression during use of hand tools by stone countertop fabricators. Methods: Controlled experiments were conducted to measure whether wet methods and on-tool local exhaust ventilation (LEV) reduced respirable dust (RD) exposures during use of various powered hand tools on quartz-rich engineered stone...
July 1, 2017: Annals of Work Exposures and Health
https://www.readbyqxmd.com/read/28927158/regulation-of-htra2-on-wt1-gene-expression-under-imatinib-stimulation-and-its-effects-on-the-cell-biology-of-k562-cells
#2
Lixia Zhang, Yan Li, Xiaoyan Li, Qing Zhang, Shaowei Qiu, Qi Zhang, Min Wang, Haiyan Xing, Qing Rao, Zheng Tian, Kejing Tang, Jianxiang Wang, Yingchang Mi
The aim of the present study was to investigate the regulation of Wilms Tumor 1 (WT1) by serine protease high-temperature requirement protein A2 (HtrA2), a member of the Htr family, in K562 cells. In addition, the study aimed to observe the effect of this regulation on cell biological functions and its associated mechanisms. Expression of WT1 and HtrA2 mRNA, and proteins following imatinib and the HtrA2 inhibitor 5-[5-(2-nitrophenyl) furfuryl iodine]-1, 3-diphenyl-2-thiobarbituric acid (UCF-101) treatment was detected with reverse transcription-quantitative polymerase chain reaction and western blot analysis...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28927129/deficiency-of-gap-junction-composed-of-connexin43-contributes-to-oxaliplatin-resistance-in-colon-cancer-cells
#3
Min Su, Qi Zhang
Although comprehensive strategies in the treatment of colorectal cancer have been developed for a number of years, the five-year survival rate of metastatic colon cancer remains less than 10%. Oxaliplatin, a commonly used chemotherapeutic agent for metastatic colon cancer, improves the response rate of patients and prolongs patients' progression-free survival. However, the generation of resistance limits the clinical application of oxaliplatin, and the mechanisms of this remain unclear. The present study mainly investigated the effect of the gap junction (GJ) composed of connexin43 (Cx43) on oxaliplatin cytotoxicity in colon cancer cells...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28927119/effect-of-glutamine-enriched-nutritional-support-on-intestinal-mucosal-barrier-function-mmp-2-mmp-9-and-immune-function-in-patients-with-advanced-gastric-cancer-during-perioperative-chemotherapy
#4
Juan Wang, Yanfen Li, Yuanling Qi
We studied the effects of glutamine-enriched nutritional support on intestinal mucosal barrier, matrix metalloproteinase (MMP)-2, MMP-9 and immune function during perioperative chemotherapy in patients with advanced gastric cancer. The study was conducted on 94 patients with advanced gastric cancer admitted from April 2015 to March 2016. They were randomly divided into observation and control groups, n=47. Control group was given basic nutritional support whereas glutamine-enriched nutritional support was given to patients in observation group...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28927095/high-expression-of-mage-a9-is-associated-with-unfavorable-survival-in-esophageal-squamous-cell-carcinoma
#5
Yu Qi, Ke Xin Cao, Fu Chen Xing, Chun Yang Zhang, Qi Huang, Kai Wu, Feng Biao Wen, Song Zhao, Xin Li
Melanoma-associated antigens (MAGEs) are a group of well-characterized members of the cancer/testis antigen family, which are expressed in a variety of malignant tumors. MAGE-A9, a subfamily of MAGE-As, has been studied in a number of types of cancer and have been associated with unfavorable survival outcome. However, the expression of MAGE-A9 in human esophageal squamous cell carcinoma (ESCC) and association of MAGE-A9 with the clinicopathological characteristics of ESCC, particularly prognostic characteristics, remains unknown...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28927013/transcription-factors-responding-to-pb-stress-in-maize
#6
Yanling Zhang, Fei Ge, Fengxia Hou, Wenting Sun, Qi Zheng, Xiaoxiang Zhang, Langlang Ma, Jun Fu, Xiujing He, Huanwei Peng, Guangtang Pan, Yaou Shen
Pb can damage the physiological function of human organs by entering the human body via food-chain enrichment. Revealing the mechanisms of maize tolerance to Pb is critical for preventing this. In this study, a Pb-tolerant maize inbred line, 178, was used to analyse transcription factors (TFs) expressed under Pb stress based on RNA sequencing data. A total of 464 genes expressed in control check (CK) or Pb treatment samples were annotated as TFs. Among them, 262 differentially expressed transcription factors (DETs) were identified that responded to Pb treatment...
September 18, 2017: Genes
https://www.readbyqxmd.com/read/28926959/a-new-erythrinan-alkaloid-glycoside-from-the-seeds-of-erythrina-crista-galli
#7
Qing-Wei Tan, Jian-Cheng Ni, Pei-Hua Fang, Qi-Jian Chen
A new Erythrina alkaloid glycoside, named erythraline-11β-O-glucopyranoside, was isolated from the seeds of Erythrina crista-galli L., together with five known Erythrina alkaloids and an indole alkaloid. The structure of the new alkaloid glycoside was elucidated by spectroscopic methods, and all of the compounds were evaluated for their antiviral activity against tobacco mosaic virus.
September 16, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28926957/combining-a-multi-agent-system-and-communication-middleware-for-smart-home-control-a-universal-control-platform-architecture
#8
Song Zheng, Qi Zhang, Rong Zheng, Bi-Qin Huang, Yi-Lin Song, Xin-Chu Chen
In recent years, the smart home field has gained wide attention for its broad application prospects. However, families using smart home systems must usually adopt various heterogeneous smart devices, including sensors and devices, which makes it more difficult to manage and control their home system. How to design a unified control platform to deal with the collaborative control problem of heterogeneous smart devices is one of the greatest challenges in the current smart home field. The main contribution of this paper is to propose a universal smart home control platform architecture (IAPhome) based on a multi-agent system and communication middleware, which shows significant adaptability and advantages in many aspects, including heterogeneous devices connectivity, collaborative control, human-computer interaction and user self-management...
September 16, 2017: Sensors
https://www.readbyqxmd.com/read/28926953/short-circuit-fault-detection-and-classification-using-empirical-wavelet-transform-and-local-energy-for-electric-transmission-line
#9
Nantian Huang, Jiajin Qi, Fuqing Li, Dongfeng Yang, Guowei Cai, Guilin Huang, Jian Zheng, Zhenxin Li
In order to improve the classification accuracy of recognizing short-circuit faults in electric transmission lines, a novel detection and diagnosis method based on empirical wavelet transform (EWT) and local energy (LE) is proposed. First, EWT is used to deal with the original short-circuit fault signals from photoelectric voltage transformers, before the amplitude modulated-frequency modulated (AM-FM) mode with a compactly supported Fourier spectrum is extracted. Subsequently, the fault occurrence time is detected according to the modulus maxima of intrinsic mode function (IMF₂) from three-phase voltage signals processed by EWT...
September 16, 2017: Sensors
https://www.readbyqxmd.com/read/28926898/-impact-factor-of-postoperative-prognosis-of-esophageal-cancer-patients-with-stage-pt2n0-1m0
#10
Y H Gao, Y X Wang, J Li, M He, Z Qi, R Qiu, X Y Qiao
Objective: To investigate the postoperative prognosis and the related factors of patients with stage pT2N0-1M0 of thoracic esophageal carcinoma(EC). Methods: From 2008 to 2011, clinical data of 275 cases with stage pT2N0-1M0 of thoracic EC treated by esophagectomy were enrolled. These cases includ 180 male and 95 female. Among them, 32 cases were upper thoracic EC, 186 cases were middle thoracic EC and 57 cases were lower thoracic EC. Alternatively, 205 cases were stage pN0, 70 cases were stage pN1. 155 cases received esophagectomy alone and 120 cases received esophagectomy and postoperative adjuvant therapy...
September 23, 2017: Zhonghua Zhong Liu za Zhi [Chinese Journal of Oncology]
https://www.readbyqxmd.com/read/28926893/-effect-of-intratumor-heterogeneity-of-esophageal-squamous-cell-carcinoma-on-chemotherapy-sensitivity
#11
L Sun, W Wu, M Yan, P L Han, X Zhan, X W Ma, X G Cao, S Zhao, F Gao, Y Qi, W Cao
Objective: To investigate the relationship of heterogeneity of esophageal squamous cell carcinoma (ESCC) and chemotherapy sensitivity. Methods: Five different region specimens isolated from primary tumor(R1~R5)and 1 specimen(R6)isolated from adjacent non-neoplastic tissue from 10 ESCC patients who underwent surgical treatment were cultured in vitro. The inhibitory effect of cisplatin on proliferation of ESCC cells from different regions was determined by methyl thiazolyl tetrazolium (MTT). The cell cycle and apoptosis induced by cisplatin was determined by flow cytometry (FCM) analysis...
September 23, 2017: Zhonghua Zhong Liu za Zhi [Chinese Journal of Oncology]
https://www.readbyqxmd.com/read/28926725/association-between-x-ray-repair-cross-complementing-group-1-xrcc1-arg399gln-polymorphism-and-endometriosis-a-systematic-review-and-meta-analysis
#12
Mo-Qi Lv, Jin Wang, Xiao-Qing Yu, Hui-Hui Hong, Wen-Juan Ren, Pang Ge, Dang-Xia Zhou
OBJECTIVE(S): X-ray repair cross-complementing group 1(XRCC1) gene is one of the DNA repair pathway genes playing a vital role in endometriosis risk. Various studies have explored the association between them, however, the results remained inconsistent. So to confirm the association between XRCC1 Arg399Gln polymorphism and the risk of endometriosis, a meta-analysis was conducted. STUDY DESIGN: PubMed, Web of Science, Science Director, Cochrane Library, Google Scholar, China National Knowledge Infrastructure (CNKI) and Wanfang Data databases were searched to identify the all relevant studies before Sep...
September 14, 2017: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/28926697/copper-inhibits-the-alkb-family-dna-repair-enzymes-under-wilson-s-disease-condition
#13
Ke Bian, Fangyi Chen, Zachary T Humulock, Qi Tang, Deyu Li
Disturbed metabolism of copper ions can cause diseases, such as Wilson's disease (WD). In this work, we investigated the inhibi-tory effect of Cu(II) ion on the AlkB family DNA repair enzymes in vitro, which are members of the Fe(II)/alpha-ketoglutarate-dependent dioxygenase and include human ALKBH2, ALKBH3, and E. coli AlkB proteins. None of the three proteins were significantly inhibited under normal cellular copper concentrations. But under WD related condition, we observed the activities of all three enzymes were strongly suppressed (from 95...
September 19, 2017: Chemical Research in Toxicology
https://www.readbyqxmd.com/read/28926687/advanced-nanostructured-anode-materials-for-sodium-ion-batteries
#14
REVIEW
Qidi Wang, Chenglong Zhao, Yaxiang Lu, Yunming Li, Yuheng Zheng, Yuruo Qi, Xiaohui Rong, Liwei Jiang, Xinguo Qi, Yuanjun Shao, Du Pan, Baohua Li, Yong-Sheng Hu, Liquan Chen
Sodium-ion batteries (NIBs), due to the advantages of low cost and relatively high safety, have attracted widespread attention all over the world, making them a promising candidate for large-scale energy storage systems. However, the inherent lower energy density to lithium-ion batteries is the issue that should be further investigated and optimized. Toward the grid-level energy storage applications, designing and discovering appropriate anode materials for NIBs are of great concern. Although many efforts on the improvements and innovations are achieved, several challenges still limit the current requirements of the large-scale application, including low energy/power densities, moderate cycle performance, and the low initial Coulombic efficiency...
September 19, 2017: Small
https://www.readbyqxmd.com/read/28926223/supramolecular-motors-on-graphite-surface-stabilized-by-charge-states-and-hydrogen-bonds
#15
Kai Sun, Ji-Yong Luo, Xin Zhang, Zhi-Jian Wu, Ying Wang, Hong-Kuan Yuan, Zu-Hong Xiong, Shao-Chun Li, Qi-Kun Xue, Jun-Zhong Wang
Molecular motors are nanoscale machines that convert external energies into controlled mechanical movements. In supramolecular motors, the rotator and stator are held together mechanically, and thus the rotation can be essentially barrier free when molecular conformation is negligible. However, nearly all the supramolecular motors appeared in solutions or host-guest complexes. Surface-mounted supramolecular motors have rarely been addressed, even though they are easily manipulated by external fields. Here we report a surface-mounted supramolecular motor assembled by charge states and hydrogen bonds...
September 19, 2017: ACS Nano
https://www.readbyqxmd.com/read/28926111/regulating-osteogenesis-and-adipogenesis-in-adipose-derived-stem-cells-by-controlling-underlying-substrate-stiffness
#16
Tao Zhang, Shiyu Lin, Xiaoru Shao, Sirong Shi, Qi Zhang, Changyue Xue, Yunfeng Lin, Bofeng Zhu, Xiaoxiao Cai
Cells reside in a complex microenvironment (niche) in which the biochemical and biophysical properties of the extracellular matrix profoundly affect cell behavior. Extracellular stiffness, one important bio-mechanical characteristic of the cell niche, is important in regulating cell proliferation, migration, and lineage specification. However, the mechanism by which mechanical signals guide osteogenic and adipogenic commitment of stem cells remains difficult to dissect. To explore this question, we generated a range of polydimethylsiloxane-based matrices with differing degrees of stiffness that mimicked the stiffness seen in natural tissues and examined adipose stem cell morphology, spreading, vinculin expression and differentiation along the osteogenic and adipogenic pathways...
September 19, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28926076/electronic-imitation-of-behavioral-and-psychological-synaptic-activities-using-tiox-al2o3-based-memristor-devices
#17
Writam Banerjee, Qi Liu, Hangbing Lv, Shibing Long, Ming Liu
Seeking an effective electronic synapse to emulate biological synaptic behavior is fundamental for building brain-inspired computers. An emerging two-terminal memristor, in which the conductance can be gradually modulated by external electrical stimuli, is widely considered as the strongest competitor of the electronic synapse. Here, we show the capability of TiOx/Al2O3-based memristor devices to imitate synaptic behaviors. Along with analog resistive switching performances, the devices replicate the bio-synapse behaviors of potentiation/depression, short-term-plasticity, and long-term-potentiation, which show that TiOx/Al2O3-based memristors may be useful as electronic synapses...
September 19, 2017: Nanoscale
https://www.readbyqxmd.com/read/28925966/modification-of-13x-molecular-sieve-by-chitosan-for-adsorptive-removal-of-cadmium-from-simulated-wastewater
#18
Yan Shi, Ken Sun, Lixin Huo, Xiuxiu Li, Xuebin Qi, Zhaohui Li
Chitosan was used to modify a 13X molecular sieve to improve its cadmium removal capability. After being modified with 2% chitosan-acetate for 2 h at 30 °C, significant uptake of Cd(2+) could be achieved. The uptake of Cd(2+) on the modified 13X molecular sieve followed the Langmuir isotherms with a capacity of 1 mg/g. The kinetics of Cd(2+) removal by modified 13X molecular sieve followed a pseudo second-order reaction, suggesting chemisorption or surface complexation. The Cd(2+) removal with a sorbent dose of 2 g/L from an initial concentration of 100 μg/L reached more than 95% in 90 min...
September 19, 2017: Materials
https://www.readbyqxmd.com/read/28925884/prevention-and-treatment-for-chemotherapy-induced-peripheral-neuropathy-therapies-based-on-cipn-mechanisms
#19
Lang-Yue Hu, Wen-Li Mi, Gen-Cheng Wu, Yan-Qing Wang, Qi-Liang Mao-Ying
BACKGROUND: Chemotherapy-induced peripheral neuropathy (CIPN) is a progressive, enduring, and often irreversible adverse effect of many antineoplastic agents, among which sensory abnormities are common and the most suffering issues. The pathogenesis of CIPN has not been completely understood, and strategies for CIPN prevention and treatment are still open problems for medicine. OBJECTIVES: The objective of this paper is to review the mechanism-based therapies against sensory abnormities in CIPN...
September 15, 2017: Current Neuropharmacology
https://www.readbyqxmd.com/read/28925693/-3-2-cycloaddition-of-azaoxyallyl-cations-with-cyclic-ketones-access-to-spiro-4-oxazolidinones
#20
Pan-Lin Shao, Zi-Rui Li, Zhi-Peng Wang, Ming-Hui Zhou, Qi Wu, Ping Hu, Yun He
The first formal [3 + 2] cycloaddition reaction of in situ-generated azaoxyallyl cation with cyclic ketones has been developed using mild reaction conditions. A variety of spiro-4-oxazolidinones was obtained in excellent yields (up to 99%). The high efficiency of this process, coupled with the operational simplicity, makes it an attractive method for the synthesis of spiro-4-oxazolidinones.
September 19, 2017: Journal of Organic Chemistry
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