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Dengke Xi, Congcong Jiang, Renwu Zhou, Zhi Fang, Xianhui Zhang, Yan Liu, Bingyu Luan, Zhe Feng, Guangliang Chen, Zhong Chen, Qinghuo Liu, Si-Ze Yang
In this research, we compared the discharge characteristics and catalytic efficiency of sulfuric acid, p-toluenesulfonic acid, and their respective sodium salts (sodium sulfate and sodium p-toluenesulfonate) in sawdust liquefaction and found that sulfuric acid was the optimal catalyst when glycerol was used as solvent during the plasma electrolytic liquefaction (PEL) process. When sodium p-toluenesulfonate was used as the only catalyst, the liquefaction yield reached 83.51% after 25 min. This yield was higher than that obtained using sodium sulfate as the catalyst (60...
August 9, 2018: Bioresource Technology
Hamidreza Hajfarajollah, Parisa Eslami, Babak Mokhtarani, Kambiz Akbari Noghabi
Among microorganisms, bacteria are the main group of biosurfactant-producing organisms. Different types of bacteria including Pseudomonas sp., Acinetobacter sp., Bacillus sp. and Arthrobacter sp. are among the most commonly studied bacteria in the realm of scientific researches. However, due to the pathogenic nature of the producing organisms, the application of these compounds is restricted, therefore, not suitable for using in food-related industries. Given that probiotic bacteria impact human health, applying probiotics as non-pathogenic and safe organisms have gained much attention for the production of biosurfactants in recent years...
August 18, 2018: Biotechnology and Applied Biochemistry
Baizhuo Dong, Zhigang Sun, Bin Zhou, Shengming Huang, Liang Han, Honghua Nie, Guohui Chen, Shibing Liu, Yanna Zhang, Ning Bao, Xiaolong Yang, Hongwei Feng
BACKGROUND: LncRNA-FENDRR is a kind of endothelial genes critical for vascular development. Moreover, miR-126 and vascular endothelial growth factor A (VEGFA) are also involved in the physiological process of vascular endothelial cells. This study aimed to the underlying mechanism of FENDRR involving miR-126 and VEGFA in hypertensive intracerebral hemorrhage (HICH). METHODS: C57BL/6 mice were chosen to establish HICH model. The expression of FENDRR, miR-126 and VEGFA at mRNA level were determined by qRT-PCR...
August 18, 2018: Microcirculation: the Official Journal of the Microcirculatory Society, Inc
Yue Zheng, Wen-Cheng Zhang, Ze-Yu Wu, Chuan-Xiang Fu, Ai-Ling Hui, Han Gao, Peng-Peng Chen, Biao Du, Hua-Wei Zhang
BACKGROUND: Macamides, the main active component contained in maca, have attracted increasing attention due to their various bioactivities. In this study, crude macamides extract (CME) and purified macamides extract (PME) were prepared by enzyme-assisted extraction and macroporous resin separation, and anti-fatigue effects of CME and PME were evaluated in a forced swimming model. RESULTS: The composition analysis results revealed that both CME and PME mainly contain 8 kinds of macamides...
August 17, 2018: Journal of the Science of Food and Agriculture
Yiqiong Yang, Qiao Ding, Minhui Yang, Yin Wang, Ning Liu, Xiaodong Zhang
This research exhibited the use of magnetic ion exchange (MIEX) resin as an effective adsorbent for the removal of perfluorooctanoate (PFOA) in aqueous solution. The adsorption performance of PFOA was investigated by a batch experiment. All kinds of factors affecting the adsorption of PFOA, including adsorbent dosage, initial concentration, adsorption time, temperature, stirring intensity, coexistent anions, initial solution pH, natural organic matter, ion strength, and bed volume were studied. Moreover, the response surface methodology was put into use to know the key parameters affecting PFOA removal efficiency...
August 17, 2018: Environmental Science and Pollution Research International
Chao Chen, Yonghua Zhang, Pan Ye, Xiaofeng Ma, Chaoxing Zheng, Genfa Zhang
There is a growing awareness that some dual-function enzymes may provide a directly evidence that metabolism could feed into the regulation of gene expression via metabolic enzymes. However, the mechanism by which metabolic enzymes control gene expression to optimize plant stress responses remains largely unknown in Arabidopsis thaliana. LOS2/ENO2 is a bifunctional gene transcribed a functional RNA that translates a full-length version of the ENO2 protein and a truncated version of the MBP-1 protein. Here, we report that eno2 negatively regulates plant tolerance to salinity stress...
August 17, 2018: Molecular Biology Reports
Joanne Arciuli
Purpose: The purpose of this tutorial is to explain how learning to read can be thought of as learning statistical regularities and to demonstrate why this is relevant for theory, modeling, and practice. This tutorial also shows how triangulation of methods and cross-linguistic research can be used to gain insight. Method: The impossibility of conveying explicitly all of the regularities that children need to acquire in a deep orthography, such as English, can be demonstrated by examining lesser-known probabilistic orthographic cues to lexical stress...
August 14, 2018: Language, Speech, and Hearing Services in Schools
Liang Xia, Bo Zhang, Qingying Yan, Shanming Ruan
BACKGROUND: Research has indicated that Herba Patriniae can suppress the growth of Several kinds of tumor cells in vitro and in vivo, thus displaying favorable antitumor activity. However, research regarding the effect of saponins of Patrinia villosa against CRC cell has not been reported. In the current study, We have revealed that the effects of saponins of patrinia villosa on colorectal cancer (CRC) cell invasion and epithelial-mesenchymal transition (EMT) as well as its underlying mechanism...
August 6, 2018: Biochemical and Biophysical Research Communications
Zahra Rezaei Khavas, Babak Mohammadzadeh Asl
BACKGROUND AND OBJECTIVES: The electrocardiogram (ECG) is a bioelectric signal which represents heart's electrical activity graphically. This bioelectric signal is subject of lots of researches and so many algorithms are designed for extracting lots of clinically important parameters from it. Most of these parameters can be measured by detecting R peak of the QRS complex in ECG signal, but when ECG signal is corrupted by different kinds of noise and artifacts, such as electromyogram (EMG) from muscles, power line interference, motion artifacts and changes in electrode-skin interface, detection of R peaks becomes hard or impossible for algorithms which are designed for heart beat detection on ECG signal...
September 2018: Computer Methods and Programs in Biomedicine
J van Bastelaar, R Granzier, L M van Roozendaal, G Beets, C D Dirksen, Y Vissers
BACKGROUND: Seroma formation is a common complication after mastectomy and is associated with delayed wound healing, infection, skin flap necrosis, patient discomfort and repeated visits to the out patient clinic to deal with seroma and its sequelae. Closing the dead space after mastectomy seems to be key in reducing seroma and its complications. Various methods have been described to reduce the dead space after mastectomy: closed suction drainage, quilting of the skin flaps and application of adhesive tissue glues...
August 17, 2018: BMC Cancer
Hui Li, Haigang Liu, Xianfeng Chen
Recently, hybrid beams have sparked considerable interest because of their properties coming from different kinds of beams at the same time. Here, we experimentally demonstrate Airy vortex beam generation in the nonlinear frequency conversion process when the fundamental wave with its phase modulated by a spatial light modulator is incident into a homogeneous nonlinear medium. In our experiments, second harmonic Airy circle vortex beams and Airy ellipse vortex beams were generated and the topological charge was also measured...
August 6, 2018: Optics Express
Hua-Feng Xu, Yuan Zhou, Hong-Wei Wu, Hua-Jun Chen, Zong-Qiang Sheng, Jun Qu
In this paper, we introduce a new kind of partially coherent vector beam with special correlation function and vortex phase named radially polarized Laguerre-Gaussian-correlated Schell-model (LGCSM) vortex beam as a natural extension of scalar LGCSM vortex beam. The realizability conditions for such beam are derived. The tight focusing properties of a radially polarized LGCSM vortex beam passing through a high numerical aperture (NA) objective lens are investigated numerically based on the vectorial diffraction theory...
August 6, 2018: Optics Express
Li Luo, Li Xia, Binshan Zha, Chunlin Zuo, Datong Deng, Mingwei Chen, Linhong Hu, Yong He, Fang Dai, Jing Wu, Changjiang Wang, Youmin Wang, Qiu Zhang
miRNAs is a kind of noncoding small RNAs with negative regulation function. Some miRNAs play a crucial role in the growth of tumor cells. In this study, we analyzed the role of miR-335-5p and its target gene intercellular adhesion molecule 1 (ICAM-1) in thyroid cancer. Real-time polymerase chain reaction (PCR) results showed that the expression level of ICAM-1 in cancer tissues was higher than that in their adjacent tissues. The expression level of ICAM-1 in papillary thyroid carcinoma was also significantly higher than that in other types of tumors...
July 12, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
Weibing Wang, Jinbai Huang, Ai Wang, Yun Li, Jie Peng, Xinjie Hu, Yingjun Liu, Haiyan Zhang, Xiaohu Li
OBJECTIVE: The aim of the study was to investigate whether spectral computed tomography (CT) plus adaptive statistical iterative reconstruction (ASIR) could improve imaging quality of computed tomography portal venography (CTPV). METHODS: Sixty-four patients underwent CTPV, with CT number of portal vein (PV) less than 150 HU in portal phase, were divided into 2 groups A (n = 31), using standard 120-kVp protocol. group B (n = 33), using spectral CT protocol. Standard 120-kVp images were reconstructed with 40% ASIR, and monochromatic images at 60 keV were reconstructed with the following 4 ASIR percentages: 0%, 20%, 40%, and 60%...
August 16, 2018: Journal of Computer Assisted Tomography
Hajer Dahmani, Kaouthar Louati, Adel Hajri, Senda Bahri, Fathi Safta
Several studies have highlighted that nutritional supplements may contain undeclared anabolic steroids that are banned by the International Olympic Committee/World Anti-Doping Agency. Any kind of abuse with these drugs is extremely dangerous because of their side effects. Thus, the control of food additives in order to protect the best consumer health and to limit fraudulent practices in the field of sports is essential. This paper describes a simple and effective qualitative gas chromatography-mass spectrometry (GC-MS) method to detect anabolic androgenic steroids (AAS): androsterone, nandrolene, dehydroepiandrosterone, 5ɑ-androstane-3β, 17β-diol, dihydrotestosterone, testosterone, methenolone acetate, methandienone, boldenone and fluoxymesterone, in food supplements...
August 14, 2018: Steroids
Xi He, Xinchen Pan, Cheng Liu, Jianqiang Zhu
A kind of beam-splitting-based single-shot phase retrieval is proposed, where the transmitted field of a sample to be observed is diffracted into many replicas by a Dammann grating and then incident on a weakly scattering phase plate with a known structure, and the exiting beams propagate roughly along their original directions and form a diffraction pattern array on the detector. All sub-diffraction patterns isolated with each other were recorded with a single measurement, and the complex amplitude of the radiation incident on the grating and accordingly transmitted from the sample can be iteratively reconstructed from the recorded diffraction pattern array...
June 10, 2018: Applied Optics
Yiming Li, Mark S Leeson, Xiaofeng Li
In underwater optical wireless communication (UOWC) channels, impulse response is widely used to describe the temporal dispersion of the received signals. In this paper, we propose a new function to model the impulse response in most realistic cases in UOWC channels. By exploiting the inherent properties of such channels, our newly proposed model is superior to the conventional weighted double gamma functions (WDGF) model in explaining the behavior of the channel. We use Monte Carlo simulation to verify that our newly proposed model has a better accuracy of numerical fitting in most cases...
June 10, 2018: Applied Optics
Luying Yi, Liqun Sun, Xianshun Ming
Multifocal Bessel beam optical coherence tomography (MBOCT) combines the advantages of Bessel beam OCT and multifocal OCT to increase imaging depth. For MBOCT, the penetration depth of the Bessel beam in highly scattering biological tissue limits the final imaging depth. In this paper, we theoretically analyze the penetration depth of the Bessel beams with different parameters to explore which kind of Bessel beam is more suitable for MBOCT in a scattering medium. The finite-difference time-domain method is used to simulate the field distribution of Bessel beams in the medium...
June 10, 2018: Applied Optics
Xiangdong Gao, Guohua Li, Ziqin Chen, Chongzhou Lan, Yanfeng Li, Perry P Gao
A magneto-optical (MO) imaging nondestructive testing (NDT) method for ferromagnetic weldments has been proposed. The mechanism of MO imaging was analyzed by the Faraday MO effect, magnetic domain theory, and magnetic hysteresis loops. Then, the relation between MO images and their corresponding excitation voltages was investigated. To explain the MO imaging system, magnetic domain distribution models of various welding states were established. These models are excited by two kinds of magnetic fields. One is the external magnetic field (Hex ), and the other is a weldment remanence field (Mr ) after Hex is removed...
July 20, 2018: Applied Optics
Rui Zhang, Yongying Yang, Zijian Liang, Jiabin Jiang, Tong Ling
A new method based on the shearing wavefront feature extraction (SWFE) of a phase plate is proposed to accurately estimate the shear ratio of the system. The relationship between the shear ratio of a quadriwave lateral shearing interferometer based on a randomly encoded hybrid grating (REHG) and the measurement sensitivity, dynamic range, and wavefront retrieval accuracy is analyzed to provide a theoretical guidance for practical application. The simulation result of the SWFE method shows that the relative error of the shear ratio value is about 1...
June 20, 2018: Applied Optics
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