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https://www.readbyqxmd.com/read/29448180/feasibility-of-four-wastes-to-remove-heavy-metals-from-contaminated-soils
#1
Can Feng, Shirong Zhang, Linxian Li, Guiyin Wang, Xiaoxun Xu, Ting Li, Qinmei Zhong
Soil washing is one of the permanent techniques to remove heavy metals, and washing agent is a key influence factor for this technique, but there is still lack of high-efficiency, eco-friendly, and inexpensive agents. In this study, four wastes including pineapple peel (PP), soybean straw (SS), broad bean straw (BBS) and tea residue (TR) were employed to remove cadmium (Cd), lead (Pb) and zinc (Zn) in contaminated soils. The Fourier transform infrared spectroscopy (FTIR) analysis indicated that hydroxyl, carboxyl, amine, carbonyl and amide groups were involved in the interaction with metal ions by complexation or ion exchange...
February 12, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29436083/direct-cyclization-of-tertiary-arylamines-with-iodonium-ylides
#2
Zhiguo Zhao, Yongrui Luo, Shuya Liu, Liang Zhang, Lei Feng, Yao Wang
Described herein is a direct cyclization of simple tertiary arylamines with iodonium ylides leading to a broad range of N-heterocycles. Completely different from known reactivity of iodonium ylides, an exceptional finding reported herein is that iodonium ylide is capable of cleaving a C(sp3)-H bond and accepting two hydrogen atoms of tertiary arylamine, thus inducing a novel cyclization process. This transformation can proceed without assistance of a transition metal catalyst while eliminating the need for premodification of amines or using additional initiator/oxidant...
February 12, 2018: Angewandte Chemie
https://www.readbyqxmd.com/read/29425820/quercetin-restrains-tgf-%C3%AE-1-induced-epithelial-mesenchymal-transition-by-inhibiting-twist1-and-regulating-e-cadherin-expression
#3
Jihong Feng, Dalong Song, SiYuan Jiang, XiaoHui Yang, TingTing Ding, Hong Zhang, Junmin Luo, Jun Liao, Qian Yin
Emerging evidence has indicated that transforming growth factor-beta 1 (TGF-β1) induces the epithelial-mesenchymal transition (EMT) in cancer cells, thus promoting their motility and invasiveness. Quercetin, a member of the polyphenolic flavonoid family, has been reported to display anticancer activity against a broad range of cancer cell types. Indeed, numerous studies have shown the cancer preventive effects and molecular mechanisms of quercetin in vitro using diverse cell model systems. However, the potential effect of quercetin on EMT remains unclear...
February 6, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29422912/a-new-mechanistic-model-for-viral-cross-protection-and-superinfection-exclusion
#4
REVIEW
Xiao-Feng Zhang, Shaoyan Zhang, Qin Guo, Rong Sun, Taiyun Wei, Feng Qu
Plants pre-infected with a mild variant of a virus frequently become protected against more severe variants of the same virus through the cross protection phenomenon first discovered in 1929. Despite its widespread use in managing important plant virus diseases, the mechanism of cross protection remains poorly understood. Recent investigations in our labs, by analyzing the whole-plant dynamics of a turnip crinkle virus (TCV) population, coupled with cell biological interrogation of individual TCV variants, revealed possible novel mechanisms for cross protection and the closely related process of superinfection exclusion (SIE)...
2018: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29421684/porous-microcapsules-with-tunable-pore-sizes-provide-easily-controllable-release-and-bioactivity
#5
Xian-Peng Zhang, Jian Luo, Da-Xia Zhang, Tong-Fang Jing, Bei-Xing Li, Feng Liu
In this paper, porous microcapsules with tunable pore sizes were prepared using interfacial polymerization by employing a temperature-responsive cross-linking agent above its so-called cloud point temperature (Tscp). The influences of porosity on the surface morphology, release profile and biological activity of the microcapsules were investigated. The results showed that both pore size and pore density could be controlled by regulating either the amount of cross-linking agent or the ratio of core material to shell material...
January 31, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29414645/activation-of-autophagy-is-required-for-oroxylin-a-to-alleviate-carbon-tetrachloride-induced-liver-fibrosis-and-hepatic-stellate-cell-activation
#6
Weiwei Chen, Zili Zhang, Zhen Yao, Ling Wang, Feng Zhang, Jiangjuan Shao, Anping Chen, Shizhong Zheng
Liver fibrosis is a reversible pathophysiological process correlated with intense repair and cicatrization mechanisms, and its end-stage cirrhosis is responsible for high morbidity and mortality worldwide. Interestingly, the use of natural products as a realistic option for the treatment of liver fibrosis has broadly been accepted. Oroxylin A, a safe and natural product, shows a wide range of pharmacological activities such as anti-inflammatory, anti-oxidant, and anti-tumor properties. However, the effects of Oroxylin A on liver fibrosis remain poorly understood...
January 24, 2018: International Immunopharmacology
https://www.readbyqxmd.com/read/29414082/sandwich-type-electrochemical-immunosensor-based-on-au-ag-supported-on-functionalized-phenolic-resin-microporous-carbon-spheres-for-ultrasensitive-analysis-of-%C3%AE-fetoprotein
#7
Xiaobo Zhang, Yueyun Li, Hui Lv, Jinhui Feng, Zengqiang Gao, Ping Wang, Yunhui Dong, Qing Liu, Zengdian Zhao
Signal amplification is crucial for obtaining low detection limits in electrochemical immunosensor. In this work, we developed a novel signal amplification strategy using Au@Ag nanoparticles loaded by polydopamine functionalized phenolic resin microporous carbon spheres (Au@Ag/PDA-PR-MCS). Phenolic resin microporous carbon spheres (PR-MCS) possesses uniform size and a large surface area (1656.8 m2 g-1). Polydopamine (PDA) functionalized phenolic resin microporous carbon spheres (PDA-PR-MCS) retains the advantages of PR-MCS and possesses strong adsorption ability...
February 2, 2018: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29407980/fluoroquinolone-derivatives-and-their-anti-tubercular-activities
#8
Yi-Lei Fan, Jian-Bing Wu, Xiang-Wei Cheng, Feng-Zhi Zhang, Lian-Shun Feng
Tuberculosis (TB) remains one of the most widespread and leading deadliest diseases, around one-third of the world's population harbor a latent infection by Mycobacterium tuberculosis (MTB), and 5-10% eventually develop an active TB. The emergency of MTB new virulent forms as well as the co-infection between MTB and HIV alarming the serious problem in TB control and demanding the need for new drugs more potent than earlier with safe ADME profile. Fluoroquinolones are emerged as a large family of synthetic broad spectrum antibiotics, and some of them were recommended as the second-line agents for the treatment of TB mainly in cases involving resistance or intolerance to first-line anti-TB therapy by WHO...
January 31, 2018: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29407646/antibiotic-resistome-in-landfill-leachate-from-different-cities-of-china-deciphered-by-metagenomic-analysis
#9
Renxin Zhao, Jie Feng, Xiaole Yin, Jie Liu, Wenjie Fu, Thomas U Berendonk, Tong Zhang, Xiaoyan Li, Bing Li
High throughput sequencing-based metagenomic analysis and network analysis were applied to investigate the broad-spectrum profiles of ARGs in landfill leachate from 12 cities in China. In total, 526 ARG subtypes belonging to 21 ARG types were detected with abundances ranging from 1.1 × 10-6 to 2.09 × 10-1 copy of ARG/copy of 16S rRNA gene. 68 ARG subtypes that accounted for 73.4%-93.4% of the total ARG abundances were shared by all leachate samples. The four most abundant ARGs, sul1, sul2, aadA and bacA can be served as ARG indicators to quantitatively predict the total abundances by linear functions (r2 = 0...
February 5, 2018: Water Research
https://www.readbyqxmd.com/read/29405989/the-label-free-immunosensor-based-on-rhodium-palladium-nanodendrites-sulfo-group-functionalized-multi-walled-carbon-nanotubes-for-the-sensitive-analysis-of-carcino-embryonic-antigen
#10
Hui Lv, Yueyun Li, Xiaobo Zhang, Zengqiang Gao, Jinhui Feng, Ping Wang, Yunhui Dong
In this work, bimetallic core-shell rhodium@palladium nanodendrites (Rh@Pd NDs) loaded on sulfo group functionalized multi-walled carbon nanotubes (MWCNTs-SO3H) were combined to form Rh@Pd NDs/MWCNTs-SO3H nanocomposites. And the composites were used to construct a simple and label-free electrochemical immunosensor for carcino embryonic antigen (CEA) detection using differential pulse voltammetry (DPV). Rh@Pd NDs with dendritic nanostructure not only provide abundant catalytically active sites, but also increase the loading of antibody, which could improve the analytical performance and result in high sensitivity...
May 12, 2018: Analytica Chimica Acta
https://www.readbyqxmd.com/read/29390682/backscatter-spectra-measurements-of-the-two-beams-on-the-same-cone-on-shenguang-iii-laser-facility
#11
Weiyi Zha, Dong Yang, Tao Xu, Yonggang Liu, Feng Wang, Xiaoshi Peng, Yulong Li, Huiyue Wei, Xiangming Liu, Yu Mei, Yadong Yan, Junhua He, Zhichao Li, Sanwei Li, Xiaohua Jiang, Liang Guo, Xufei Xie, Kaiqiang Pan, Shenye Liu, Shaoen Jiang, Baohan Zhang, Yongkun Ding
In laser driven hohlraums, laser beams on the same incident cone may have different beam and plasma conditions, causing beam-to-beam backscatter difference and subsequent azimuthal variations in the x-ray drive on the capsule. To elucidate the large variation of backscatter proportion from beam to beam in some gas-filled hohlraum shots on Shenguang-III, two 28.5° beams have been measured with the Stimulated Raman Scattering (SRS) time-resolved spectra. A bifurcated fiber is used to sample two beams and then coupled to a spectrometer and streak camera combination to reduce the cost...
January 2018: Review of Scientific Instruments
https://www.readbyqxmd.com/read/29381055/a-robust-mechanically-and-electrically-self-healing-hydrogel-for-efficient-electromagnetic-interference-shielding
#12
Weixing Yang, Bowen Shao, Tianyu Liu, Yiyin Zhang, Rui Huang, Feng Chen, Qiang Fu
Autonomously self-healing hydrogels have received considerable attentions owe to their capacity for repairing themselves spontaneously after suffering damage, which can provide better stability and longer lifespan. In this work, a robust, mechanically and electrically self-healing hydrogel with efficient electromagnetic interference (EMI) shielding performance was successfully fabricated via the incorporation of multi-walled carbon nanotubes (MWCNTs) into the hydrophobically associated polyacrylamide (PAM) hydrogels by using cellulose nanofiber (CNF) as dispersant...
January 30, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29378572/crispr-dcas9-mediated-transcriptional-improvement-of-the-biosynthetic-gene-cluster-for-the-epothilone-production-in-myxococcus-xanthus
#13
Ran Peng, Ye Wang, Wan-Wan Feng, Xin-Jing Yue, Jiang-He Chen, Xiao-Zhuang Hu, Zhi-Feng Li, Duo-Hong Sheng, You-Ming Zhang, Yue-Zhong Li
BACKGROUND: The CRISPR/dCas9 system is a powerful tool to activate the transcription of target genes in eukaryotic or prokaryotic cells, but lacks assays in complex conditions, such as the biosynthesis of secondary metabolites. RESULTS: In this study, to improve the transcription of the heterologously expressed biosynthetic genes for the production of epothilones, we established the CRISPR/dCas9-mediated activation technique in Myxococcus xanthus and analyzed some key factors involving in the CRISPR/dCas9 activation...
January 29, 2018: Microbial Cell Factories
https://www.readbyqxmd.com/read/29373023/understanding-conversion-type-electrodes-for-lithium-rechargeable-batteries
#14
Seung-Ho Yu, Xinran Feng, Na Zhang, Jeesoo Seok, Héctor D Abruña
The need/desire to lower the consumption of fossil fuels and its environmental consequences has reached unprecedented levels in recent years. A global effort has been undertaken to develop advanced renewable energy generation and especially energy storage technologies, as they would enable a dramatic increase in the effective and efficient use of renewable (and often intermittent) energy sources. The development of electrical energy storage (EES) technologies with high energy and power densities, long life, low cost, and safe use represents a challenge from both the fundamental science and technological application points of view...
January 26, 2018: Accounts of Chemical Research
https://www.readbyqxmd.com/read/29364847/sensing-performance-analysis-on-quartz-tuning-fork-probe-at-the-high-order-vibration-mode-for-multi-frequency-scanning-probe-microscopy
#15
Xiaofei Zhang, Fengli Gao, Xide Li
Multi-frequency scanning near-field optical microscopy, based on a quartz tuning fork-probe (QTF-p) sensor using the first two orders of in-plane bending symmetrical vibration modes, has recently been developed. This method can simultaneously achieve positional feedback (based on the 1st in-plane mode called the low mode) and detect near-field optically induced forces (based on the 2nd in-plane mode called the high mode). Particularly, the high mode sensing performance of the QTF-p is an important issue for characterizing the tip-sample interactions and achieving higher resolution microscopic imaging but the related researches are insufficient...
January 24, 2018: Sensors
https://www.readbyqxmd.com/read/29351731/a-chelicerate-specific-burst-of-nonclassical-dscam-diversity
#16
Guozheng Cao, Yang Shi, Jian Zhang, Hongru Ma, Shouqing Hou, Haiyang Dong, Weiling Hong, Shuo Chen, Hao Li, Yandan Wu, Pengjuan Guo, Xu Shao, Bingbing Xu, Feng Shi, Yijun Meng, Yongfeng Jin
BACKGROUND: The immunoglobulin (Ig) superfamily receptor Down syndrome cell adhesion molecule (Dscam) gene can generate tens of thousands of isoforms via alternative splicing, which is essential for both nervous and immune systems in insects. However, further information is required to develop a comprehensive view of Dscam diversification across the broad spectrum of Chelicerata clades, a basal branch of arthropods and the second largest group of terrestrial animals. RESULTS: In this study, a genome-wide comprehensive analysis of Dscam genes across Chelicerata species revealed a burst of nonclassical Dscams, categorised into four types-mDscam, sDscamα, sDscamβ, and sDscamγ-based on their size and structure...
January 19, 2018: BMC Genomics
https://www.readbyqxmd.com/read/29350229/aggregate-evolution-in-aqueous-solutions-of-a-gemini-surfactant-derived-from-dehydroabietic-acid
#17
Lin Feng, Danhua Xie, Binglei Song, Jiayu Zhang, Xiaomei Pei, Zhenggang Cui
Innovations in surfactant structure are a feasible way to probe molecular self-assembly principles. Herein, the solution behaviour of a newly synthesized Gemini surfactant derived from dehydroabietic acid, abbreviated R-(EO)-E-R, was investigated using surface tension, fluorescence, isothermal titration calorimetry (ITC), rheology, freeze-fracture transmission electron microscopy (FF-TEM) and cryogenic transmission electron microscopy (cryo-TEM) methods. R-(EO)-E-R has two large, rigid hydrophobic groups. At low concentrations, R-(EO)-E-R forms micelles with an aggregation number of approximately 10, which is smaller than those of Gemini surfactants containing flexible alkyl tails...
January 19, 2018: Soft Matter
https://www.readbyqxmd.com/read/29343066/kane-fermion-in-two-dimensional-%C3%AF-conjugated-bis-iminothiolato-nickel-monolayer
#18
Aizhu Wang, Xinrui Zhao, Mingwen Zhao, Xiaoming Zhang, Yuan Ping Feng, Feng Liu
Massless Kane fermion revealed in zinc-blende semiconductors has recently gained interest in the broad study of relativistic materials. In particular, two-dimensional (2D) Kane fermion was expected as a hybrid of a pseudospin-1 and -1/2 Dirac fer-mions. Based on first-principles calculations, we demonstrated that 2D Kane fermion can be realized in a recently-synthesized metal-organic framework, namely bis(iminothiolato)nickel monolayer. A slight compression takes the system from a sem-imetal to a semiconductor...
January 17, 2018: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/29325208/bioinspired-universal-flexible-elastomer-based-microchannels
#19
Feng Wu, Songyue Chen, Baiyi Chen, Miao Wang, Lingli Min, Jack Alvarenga, Jie Ju, Ali Khademhosseini, Yuxing Yao, Yu Shrike Zhang, Joanna Aizenberg, Xu Hou
Flexible and stretchable microscale fluidic devices have a broad range of potential applications, ranging from electronic wearable devices for convenient digital lifestyle to biomedical devices. However, simple ways to achieve stable flexible and stretchable fluidic microchannels with dynamic liquid transport have been challenging because every application for elastomeric microchannels is restricted by their complex fabrication process and limited material selection. Here, a universal strategy for building microfluidic devices that possess exceptionally stable and stretching properties is shown...
January 11, 2018: Small
https://www.readbyqxmd.com/read/29322649/design-expression-and-characterization-of-the-hybrid-antimicrobial-peptide-t-catesbeianin-1-based-on-fyua
#20
Huihui Xu, Kunyuan Tie, Yang Zhang, Xin Feng, Yuan Cao, Wenyu Han
The overuse of antibiotics has resulted in the emergence of antibiotic-resistant bacteria, which presents an urgent need for new antimicrobial agents. At present, antimicrobial peptides have attracted a great deal of attention from researchers. However, antimicrobial peptides often affect a broad range of microorganisms, including the normal flora in a host organism. In the present study, we designed a novel hybrid antimicrobial peptide, expressed the hybrid peptide, and studied its specific target. The hybrid peptide, named T-catesbeianin-1, which includes the FyuA-binding domain of pesticin and the peptide catesbeianin-1, was designed and expressed in Pichia pastoris X-33...
January 2018: Journal of Peptide Science: An Official Publication of the European Peptide Society
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