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https://www.readbyqxmd.com/read/28936749/misfolding-and-aggregation-of-nascent-proteins-a-novel-mode-of-toxic-cadmium-action-in-vivo
#1
REVIEW
Markus J Tamás, Bruno Fauvet, Philipp Christen, Pierre Goloubinoff
Cadmium is a highly poisonous metal and a human carcinogen, but the molecular mechanisms underlying its cellular toxicity are not fully understood. Recent findings in yeast cells indicate that cadmium exerts its deleterious effects by inducing widespread misfolding and aggregation of nascent proteins. Here, we discuss this novel mode of toxic heavy metal action and propose a mechanism by which molecular chaperones may reduce the damaging effects of heavy metal ions on protein structures.
September 21, 2017: Current Genetics
https://www.readbyqxmd.com/read/28936224/role-of-crrlk1l-cell-wall-sensors-hercules1-and-2-theseus1-and-feronia-in-growth-adaptation-triggered-by-heavy-metals-and-trace-elements
#2
Julia Richter, Marie Ploderer, Gaëlle Mongelard, Laurent Gutierrez, Marie-Theres Hauser
Cell walls are not only a protective barrier surrounding protoplasts but serve as signaling platform between the extracellular environment and the intracellular physiology. Ions of heavy metals and trace elements, summarized to metal ions, bind to cell wall components, trigger their modification and provoke growth responses. To examine if metal ions trigger cell wall sensing receptor like kinases (RLKs) of the Catharanthus roseus RLK1-like (CrRLK1L) family we employed a molecular genetic approach. Quantitative transcription analyses show that HERCULES1 (HERK1), THESEUS1 (THE1), and FERONIA (FER) were differently regulated by cadmium (Cd), nickel (Ni), and lead (Pb)...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28933740/synthesis-characterization-and-in-vitro-evaluation-of-a-novel-glycol-chitosan-edta-conjugate-to-inhibit-aminopeptidase-mediated-degradation-of-thymopoietin-oligopeptides
#3
Jiao Feng, Yan Chen, Feng Li, Lili Cui, Nianqiu Shi, Wei Kong, Yong Zhang
In this study, a novel conjugate consisting of glycol chitosan (GCS) and ethylene diamine tetraacetic acid (EDTA) was synthesized and characterized in terms of conjugation and heavy metal ion chelating capacity. Moreover, its potential application as a metalloenzyme inhibitor was evaluated with three thymopoietin oligopeptides in the presence of leucine aminopeptidase. The results from FTIR and NMR spectra revealed that the covalent attachment of EDTA to GCS was achieved by the formation of amide bonds between the carboxylic acid group of EDTA and amino groups of GCS...
July 26, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28932676/carbon-nanofibers-heavy-laden-with-li3v2-po4-3-particles-featuring-superb-kinetics-for-high-power-lithium-ion-battery
#4
Jeongyim Shin, Junghoon Yang, Chernov Sergey, Min-Sang Song, Yong-Mook Kang
Fast lithium ion and electron transport inside electrode materials are essential to realize its superb electrochemical performances for lithium rechargeable batteries. Herein, a distinctive structure of cathode material is proposed, which can simultaneously satisfy these requirements. Nanosized Li3V2(PO4)3 (LVP) particles can be successfully grown up on the carbon nanofiber via electrospinning method followed by a controlled heat-treatment. Herein, LVP particles are anchored onto the surface of carbon nanofiber, and with this growing process, the size of LVP particles as well as the thickness of carbon nanofiber can be regulated together...
September 2017: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/28932505/the-features-of-morphological-changes-in-the-urinary-bladder-under-combined-effect-of-heavy-metal-salts
#5
Anatolii Romaniuk, Vladyslav Sikora, Mykola Lyndin, Vladyslav Smiyanov, Volodymyr Sikora, Yulia Lyndina, Artem Piddubnyi, Nataliya Gyryavenko, Anna Korobchanska
PURPOSE: This study is aimed to the investigation of the features of morphological changes in the urinary bladder of mature rats. RESULTS: Received results shown that the experimental group of rats that had the intake of heavy metal salts (HMS) mixture during 30 and 90 days were observed histological and immunohistochemical changes in all structures of the urinary bladder. Depending on the period of influence of heavy metal ions on the wall of the organ, the pathological changes developed in cellular layers of the wall can lead to degenerative and later to atrophic and sclerotic changes...
June 2017: Interventional Medicine & Applied Science
https://www.readbyqxmd.com/read/28932199/bacillus-a-biological-tool-for-crop-improvement-through-bio-molecular-changes-in-adverse-environments
#6
REVIEW
Ramalingam Radhakrishnan, Abeer Hashem, Elsayed F Abd Allah
Crop productivity is affected by environmental and genetic factors. Microbes that are beneficial to plants are used to enhance the crop yield and are alternatives to chemical fertilizers and pesticides. Pseudomonas and Bacillus species are the predominant plant growth-promoting bacteria. The spore-forming ability of Bacillus is distinguished from that of Pseudomonas. Members of this genus also survive for a long time under unfavorable environmental conditions. Bacillus spp. secrete several metabolites that trigger plant growth and prevent pathogen infection...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28931866/ion-channel-aligned-gas-blocking-membrane-for-lithium-air-batteries
#7
Wonsung Choi, Mokwon Kim, Jung Ock Park, Joon-Hee Kim, Kyunghwan Choi, Yong Su Kim, Tae Young Kim, Ken Ogata, Dongmin Im, Seok-Gwang Doo, Yunil Hwang
Lithium-metal-based batteries, owing to the extremely high specific energy, have been attracting intense interests as post-Li-ion batteries. However, their main drawback is that consumption/de-activation of lithium metal can be accelerated when O2 or S used in the cathode crosses over to the metal, reducing the lifetime of the batteries. In use of ceramic solid state electrolyte (SSE) separator, despite the capability of gas blocking, thick and heavy plates (~0.3 mm) are necessitated to compensate its mechanical fragility, which ruin the high specific energy of the batteries...
September 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28930696/impact-of-a-newly-formed-periglacial-environment-and-other-factors-on-fresh-water-chemistry-at-the-western-shore-of-admiralty-bay-in-the-summer-of-2016-king-george-island-maritime-antarctica
#8
Małgorzata Szopińska, Danuta Szumińska, Robert Józef Bialik, Stanisław Chmiel, Joanna Plenzler, Żaneta Polkowska
This study provides a comprehensive analysis of the inorganic chemistry of flowing water at the western shore of Admiralty Bay. In the water samples, ions, and major and trace metals (and B) were detected and quantified. Additionally, the parameters of pH, specific electrolytic conductivity (SEC25) and total organic carbon (TOC) were determined. Moreover, multivariate data set was created and Principal Component Analysis (PCA) was performed. Generally, the water has low total content of the measured mineral constituents <100mgL(-1)...
September 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28929085/the-potential-of-heavy-ion-therapy-to-improve-outcomes-for-locally-advanced-non-small-cell-lung-cancer
#9
Stephen G Chun, Timothy D Solberg, David R Grosshans, Quynh-Nhu Nguyen, Charles B Simone, Radhe Mohan, Zhongxing Liao, Stephen M Hahn, Joseph M Herman, Steven J Frank
No abstract text is available yet for this article.
2017: Frontiers in Oncology
https://www.readbyqxmd.com/read/28928754/responses-of-plant-proteins-to-heavy-metal-stress-a-review
#10
REVIEW
Md Kamrul Hasan, Yuan Cheng, Mukesh K Kanwar, Xian-Yao Chu, Golam J Ahammed, Zhen-Yu Qi
Plants respond to environmental pollutants such as heavy metal(s) by triggering the expression of genes that encode proteins involved in stress response. Toxic metal ions profoundly affect the cellular protein homeostasis by interfering with the folding process and aggregation of nascent or non-native proteins leading to decreased cell viability. However, plants possess a range of ubiquitous cellular surveillance systems that enable them to efficiently detoxify heavy metals toward enhanced tolerance to metal stress...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28928064/preparation-of-composite-aerogels-based-on-sodium-alginate-and-its-application-in-removal-of-pb-2-and-cu-2-from-water
#11
Yaoge Huang, Zhuqing Wang
A novel Ethylenediamine-Modified Calcium Alginate Aerogel (ECAA) was synthesized by freeze-drying method, and used to remove Pb(2+) and Cu(2+) from aqueous solutions. The prepared adsorbent was characterized by using the FTIR spectra, SEM analysis and XPS analysis. The effects of the pH, initial metal ion concentration, adsorption kinetics, and isotherms had been studied systematically. Moreover, the ECAA can be regenerated by simple acid treatment and used repeatedly. It is interesting to note that almost no Ca(2+) can be detected after the first cycle that confirmed the adsorption process involves ion exchange...
September 18, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28923600/fungal-strains-isolation-identification-and-application-for-the-recovery-of-zn-ii-ions
#12
Kiran Aftab, Kalsoom Akhtar, Abida Kausar, Shazia Khaliq, Numrah Nisar, Huma Umbreen, Munawar Iqbal
Fungal biomass proves to be highly efficient for the treatment of wastewater as well as recovery of metal ions from wastewater. Present investigation was aimed to evaluate the efficiency of indigenous fungal isolates for the sequestration of Zn(II) ions aqueous solution. Among twenty five fungal isolates, Aspergillus oryzae SV/09 (AO SV/09), Aspergillus flavus NA9 (AF NA9) and Paecilomyces formosus DTO 63f4 (PF DTO-63f4) were identified by gene sequencing of ITS regions of the ribosomal DNA (rDNA). The AO SV/09, AF NA9 and PF DTO-63f4 showed promising efficiency for the biosorption of Zn(II) ions...
September 4, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28918291/distinguished-cr-vi-capture-with-rapid-and-superior-capability-using-polydopamine-microsphere-behavior-and-mechanism
#13
Qingrui Zhang, Yixuan Li, Qinggang Yang, He Chen, Xinqing Chen, Tifeng Jiao, Qiuming Peng
Toxic heavy metal containing Cr(VI) species is a serious threat for ecological environment and human beings. In this work, a new mussel-inspired polydopamine microsphere (PDA-sphere) is prepared through in situ oxidative polymerization at air condition with controllable sizes. The adsorption of Cr(VI) ions onto PDA-sphere is highly pH dependent with the optimal pH ranging from 2.5 to 3.8. A rapid Cr(VI) removal can approach in 8min for equilibrium. More importantly, the prepared materials exhibit a remarkable sorption selectivity, coexisting SO4(2-), NO3(-) and Cl(-) ions at high levels; The applicability model further proves its effective performances with treated capacity of 42,000kg/kg sorbent, and the effluent can be reduced from 2000ppb to below 50ppb, which meets the drinking water criterions recommended by WHO...
August 26, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28917927/utilizing-cellulose-sheets-as-structure-promoter-constructing-different-micro-nano-titanate-nanotubes-networks-for-green-water-purification
#14
Lulu Xu, Ye Xiong, Baokang Dang, Chao Wang, Chunde Jin, Qingfeng Sun, Xiaochun Zhang
In this work, we provide a novel strategy of constructing different micro-nano structure (arrayed, multilevel, flower-like) titanate nanotubes (TNTs) networks with cellulose sheets as structure promoter. Through cellulose self-locking and inter-locking, several micro-nano TNTs networks with higher specific surface area are obtained and applied to toxic heavy metal Pb(2+) cations removal. It not only makes abundant toxic Pb(2+) ions exchange with the inter-layer Na(+) ions of TNTs, but also allows many Pb(2+) ions to be deposited onto the TNTs surface...
November 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28917099/a-versatile-bio-based-material-for-efficiently-removing-toxic-dyes-heavy-metal-ions-and-emulsified-oil-droplets-from-water-simultaneously
#15
Daikun Li, Qing Li, Daoyong Mao, Ningning Bai, Hongzhou Dong
Developing versatile materials for effective water purification is significant for environment and water source protection. Herein, a versatile bio-based material (CH-PAA-T) was reported by simple thermal cross-linking chitosan and polyacrylic acid which exhibits excellent performances for removing insoluble oil, soluble toxic dyes and heavy metal ions from water, simultaneously. The adsorption capacities are 990.1mgg(-1) for methylene blue (MB) and 135.9mgg(-1) for Cu(2+), which are higher than most of present advanced absorbents...
September 5, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28915545/air-pollution-at-rochester-ny-long-term-trends-and-multivariate-analysis-of-upwind-so2-source-impacts
#16
Fereshteh Emami, Mauro Masiol, Philip K Hopke
There have been many changes in the air pollutant sources in the northeastern United States since 2001. To assess the effect of these changes, trend analyses of the monthly average values were performed on PM2.5 and its components including major ions, elemental carbon (EC), organic carbon (OC), and gaseous pollutant concentrations measured between 2001 (in some cases 1999) and 2015 at the NYS Department of Environmental Conservation sites in Rochester, NY. Mann-Kendall regression with Sen's slope was applied to estimate the trends and seasonality...
September 11, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28915490/bioremoval-of-zinc-and-manganese-by-bacterial-biofilm-a-bioreactor-based-approach
#17
Trishna Pani, Anamika Das, Jabez Williams Osborne
Industrialization has led to the disposal of a massive amount of heavy metals every year, showing perilous effects on humans, marine life and agricultural products. There are numerous chemical and biological approaches available but their implementation is limited due to high cost and low efficiency. Therefore, the present study was focused on the biofilm- based bioremoval of heavy metals (zinc and manganese) using indigenous bacteria isolated from the tannery sludge obtained from Ranipet, Tamil Nadu. The effective isolate was capable of tolerating up to 2000mg/L of zinc and manganese and was further used for development of biofilm on the peels of Cucumis sativus...
September 6, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28915474/simultaneous-removal-of-cadmium-zinc-and-manganese-using-electrocoagulation-influence-of-operating-parameters-and-electrolyte-nature
#18
Longqian Xu, Guangzhu Cao, Xiaojun Xu, Shuli Liu, Zhengyang Duan, Changhua He, Yao Wang, Qihua Huang
In the present study, the influence of operating parameters and electrolyte nature on the simultaneous removal of toxic metals (cadmium, zinc and manganese) from synthetic smelting wastewater by batch electrocoagulation was investigated. This wastewater contained high concentrations of anion-cation electrolytes. Results indicated that the efficiency of heavy metals removal can be enhanced by increasing the solution pH and current density. The Fe-Fe electrode combination is more effective than the other combinations (Al-Al, Al-Fe and Fe-Al)...
September 12, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28914413/study-of-the-mechanism-of-remediation-of-cd-contaminated-soil-by-novel-biochars
#19
Zhongxin Tan, Yuanhang Wang, Limei Zhang, Qiaoyun Huang
This article used novel non-magnetized and magnetized biochars prepared under a CO2 atmosphere returned to Cd-contaminated soil and compared these to the effects of conventional biochars prepared under a N2 atmosphere with regard to Cd-contaminated soil remediation. A pot experiment with lettuce (Lactuca sativa) was conducted to investigate the relative soil remediation effects of these biochars. The soil used for the pot experiment was spiked with 20 mg kg(-1) Cd and amended with 5% of a biochar before sowing...
September 15, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28913631/comparative-proteomic-analysis-and-characterization-of-benzo-a-pyrene-removal-by-microbacterium-sp-strain-m-csw3-under-denitrifying-conditions
#20
Wei Qin, FuQiang Fan, Yi Zhu, Yingying Wang, Xiang Liu, Aizhong Ding, Junfeng Dou
High-molecular-weight polycyclic aromatic hydrocarbons are persistent organic pollutants with great environmental and human health risks and the associated bioremediation activities have always been hampered by the lack of powerful bacterial species under redox conditions. A Microbacterium sp. strain capable of using benzo(a)pyrene as sole carbon and energy sources under denitrifying conditions was isolated. The difference in protein expression during BaP removal and removal characterization were investigated...
September 14, 2017: Bioprocess and Biosystems Engineering
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