keyword
MENU ▼
Read by QxMD icon Read
search

Arsenic

keyword
https://www.readbyqxmd.com/read/29786936/a-general-synthesis-of-phosphorus-and-arsenic-containing-analogues-of-the-thio-and-seleno-cyanate-anions
#1
Frank Tambornino, Alexander Hinz, Ralf Köppe, Jose Manuel Goicoechea
A general synthetic protocol for the synthesis of phosphorus- and arsenic-containing analogues of the thio- and seleno-cyanate anions is reported. This procedure allows for the isolation of three unprecedented species: the phosphaethynselenolate, PCSe- (1), the arsaethynthiolate, AsCS- (2), and the arsaethynselenolate, AsCSe- (3), anions. The structures, electronic properties, and spectroscopic signatures of these species are reported.
May 22, 2018: Angewandte Chemie
https://www.readbyqxmd.com/read/29785482/characterization-and-antimicrobial-property-of-some-heavy-metals-containing-ayurvedic-drugs
#2
Prasamsha Panta, Tika Ram Bhandari, Bidit Lamsal, Rameshwar Adhikari
Ayurvedic medicines are often used in different formulations, the heavy metals, which are generally referred to as being toxic. In this work, we report on the physicochemical characterization and biological activity of some typical Ayurvedic drugs available in the market that contain arsenic, mercury and lead with the emphasis on their antibacterial performance. Among the formulations studied, some of the drugs with 'amorphous' texture (and higher solubility) were found quite active against some bacterial strains whereas the formulations possessing crystalline texture (and low solubility) were found practically ineffective...
2018: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29784305/comparison-of-on-site-field-measured-inorganic-arsenic-in-rice-with-laboratory-measurements-using-a-field-deployable-method-method-validation
#3
Angstone Thembachako Mlangeni, Valeria Vecchi, Gareth J Norton, Andrea Raab, Eva M Krupp, Joerg Feldmann
A commercial arsenic field kit designed to measure inorganic arsenic (iAs) in water was modified into a field deployable method (FDM) to measure iAs in rice. While the method has been validated to give precise and accurate results in the laboratory, its on-site field performance has not been evaluated. This study was designed to test the method on-site in Malawi in order to evaluate its accuracy and precision in determination of iAs on-site by comparing with a validated reference method and giving original data on inorganic arsenic in Malawian rice and rice-based products...
October 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29784017/investigating-aquifer-contamination-and-groundwater-quality-in-eastern-terai-region-of-nepal
#4
Sanjay Mahato, Asmita Mahato, Pankaj Kumar Karna, Nisha Balmiki
OBJECTIVE: This study aims at assessing the groundwater quality of the three districts of Eastern Terai region of Nepal viz. Morang, Jhapa, Sunsari using physicochemical characteristics and statistical approach so that possible contamination of water reservoir can be understood. pH, temperature, conductivity, turbidity, color, total dissolved solids, fluorides, ammonia, nitrates, chloride, total hardness, calcium hardness, calcium, magnesium, total alkalinity, iron, manganese, arsenic have to be analyzed to know the present status of groundwater quality...
May 21, 2018: BMC Research Notes
https://www.readbyqxmd.com/read/29783652/pituitary-gonadal-thyroid-hormones-and-endocrine-disruptors-in-pre-and-postmenopausal-nigerian-women-with-er-pr-and-her-2-positive-and-negative-breast-cancers
#5
Olulope Ajayi, Mabel Charles-Davies, John Anetor, Adeyinka Ademola
Breast cancer is broadly sub-divided into hormone responsive and non-hormone responsive subtypes. Estradiol has been associated with hormone responsive breast cancers. There is, however, a paucity of information on the role of sex hormones, gonadotropins, and thyroid hormone in non-hormone responsive breast cancer. This study aimed to determine differences in the serum levels of sex hormones, gonadotropins, thyroid hormones, and endocrine disruptors (lead, cadmium, and arsenic) in Nigerian women with hormone responsive and non-hormone responsive breast cancers...
May 18, 2018: Medical Sciences: Open Access Journal
https://www.readbyqxmd.com/read/29783178/an-alternative-approach-for-nitrate-and-arsenic-removal-from-wastewater-via-a-nitrate-dependent-ferrous-oxidation-process
#6
Meilin Zhang, Yingfen Li, Xinxian Long, Yunxiao Chong, Guangwei Yu, Zihao He
Owing to the high efficiency of converting nitrate to nitrogen gas with ferrous iron as the electron donor, the process of nitrate-dependent ferrous oxidation (NDFeO) has been considered suitable to treat wastewater that contains nitrate but lacks organic matter. Meanwhile, arsenic immobilization often has been found during the NDFeO reaction. Thus, it was strongly expected that nitrate and arsenic could be removed simultaneously in co-contaminated wastewater through the NDFeO process. However, in the current work, arsenic was not removed during the NDFeO process when the pH was high (above 8), though the nitrate reduction rate was over 90%...
May 18, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29782934/effects-of-copper-and-arsenic-stress-on-the-development-of-norway-spruce-somatic-embryos-and-their-visualization-with-the-environmental-scanning-electron-microscope
#7
Biljana Đorđević, Vilém Neděla, Eva Tihlaříková, Václav Trojan, Ladislav Havel
Somatic embryogenesis is an important biotechnological technique which can be used in studies associated with environmental stress. Four embryogenic cell lines of Norway spruce were grown on media enriched with copper and arsenic in concentration ranges 50-500 μM and 10-50 μM, respectively. The effects were observed during subsequent stages of somatic embryogenesis, the characteristics evaluated being proliferation potential, average number of somatic embryos obtained per g/fresh weight, morphology of developed somatic embryos, metal uptake, and microanalysis of macro- and micronutrients uptake...
May 18, 2018: New Biotechnology
https://www.readbyqxmd.com/read/29782897/metal-concentrations-in-fillet-and-gill-of-parrotfish-scarus-ghobban-from-the-persian-gulf-and-implications-for-human-health
#8
Yadolah Fakhri, Narottam Saha, Ali Miri, Aziz Rahimizadeh, Laleh Roomiani, Mansour Ghaderpoori, Mahmoud Taghavi, Hassan Keramati, Zohreh Bahmani, Bigard Moradi, Nazak Amanidaz
Despite the benefits of seafood's consumption, the bioaccumulation of metals in fish can endanger consumers' health. This study analyzed lead (Pb), mercury (Hg), Arsenic (As), and Cadmium (Cd) concentrations in fillet and gill of parrotfish (Scarus ghobban) using flame atomic adsorption spectroscopy (FAAS). The potential non-carcinogenic and carcinogenic health risks due to consumption of Scarus ghobban fillet were assessed by estimating average target hazard quotient (THQ) and total target hazard quotient (TTHQ) and Incremental Lifetime Cancer Risk cancer risk (ILCR) of the analyzed metals...
May 18, 2018: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/29778937/copper-ii-and-or-arsenite-induced-oxidative-stress-cascades-apoptosis-and-autophagy-in-the-skeletal-muscles-of-chicken
#9
Yu Wang, Hongjing Zhao, Yizhi Shao, Juanjuan Liu, Jinglun Li, Liyang Luo, Mingwei Xing
Arsenic (As) is a ubiquitous environmental toxin and robust inducer of oxidative stress (OxS). Copper (Cu) is an essential microelement, which participates in OxS as a cofactor for certain enzymes, with narrow optimal range between essential and toxic concentrations. However, their effects are rarely studied in chicken skeletal muscles, which have soaring per capita consumption andare susceptible to oxidative damage. In the present study, we demonstrated that the administration of copper sulfate (300 mg kg-1 ) or arsenite (30 mg kg-1 ) individually or their co-administration leads to varying degrees of OxS in the skeletal muscles of chickens...
May 11, 2018: Chemosphere
https://www.readbyqxmd.com/read/29778685/methodology-of-spatial-risk-assessment-for-arsenic-species-associated-with-sampling-and-analysis-results-optimization
#10
Yimei Zhang, Liqun Wang, Jie Chen, Yalong Zhao, Yuxian Lai, Panpan Wu
The conventional risk assessment methods may be defective for more effective health risk assessment due to ignoring heavy metal species and the accuracy and integrity of sampling and analysis results. Using the accurate and integral data to quantify the human health effects of metal species can provide great support for more effective health risk assessment. This study presents a new methodology to optimize sampling and analysis results for implementing the spatial human health risk of heavy metal species in contaminated sites...
May 17, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29778169/rhizophagus-irregularis-influences-as-and-p-uptake-by-alfafa-and-the-neighboring-non-host-pepperweed-growing-in-an-as-contaminated-soil
#11
Xin Zhang, Baihui Ren, Songlin Wu, Yuqing Sun, Baodong Chen, Ruojuan Li
It was documented that arbuscular mycorrhiza fungi (AMF) play an important role in protecting host plants against arsenic (As) contamination. However, most terrestrial ecosystems contain a considerable number of nonmycorrhizal plants. So far little information is available for the interaction of such non-host plants with AMF under As contaminations. By using a dual compartment cultivation system with a plastic board or a nylon mesh separating roots of non-host pepperweed from roots of the AM-host alfafa plants, avoiding direct root competition, the two plant species were grown separately or partially separated (with rhizosphere effects) in the presence or absence of the AMF Rhizophagus irregularis in As-contaminated soil...
May 2018: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/29778047/source-identification-and-spatial-distribution-of-arsenic-and-heavy-metals-in-agricultural-soil-around-hunan-industrial-estate-by-positive-matrix-factorization-model-principle-components-analysis-and-geo-statistical-analysis
#12
Xiaowen Zhang, Shuai Wei, Qianqian Sun, Syed Abdul Wadood, Boli Guo
Characterizing the distribution and defining potential sources of arsenic and heavy metals are the basic preconditions for reducing the contamination of heavy metals and metalloids. 71 topsoil samples and 61 subsoil samples were collected by grid method to measure the concentration of cadmium (Cd), arsenic (As), lead (Pb), copper (Cu), zinc (Zn), nickel (Ni) and chromium (Cr). Principle components analysis (PCA), GIS-based geo-statistical methods and Positive Matrix Factorization (PMF) were applied. The results showed that the mean concentrations were 9...
May 16, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29776370/characterization-of-a-promiscuous-cadmium-and-arsenic-resistance-mechanism-in-thermus-thermophilus-hb27-and-potential-application-of-a-novel-bioreporter-system
#13
Immacolata Antonucci, Giovanni Gallo, Danila Limauro, Patrizia Contursi, Ana Luisa Ribeiro, Alba Blesa, José Berenguer, Simonetta Bartolucci, Gabriella Fiorentino
BACKGROUND: The characterization of the molecular determinants of metal resistance has potential biotechnological application in biosensing and bioremediation. In this context, the bacterium Thermus thermophilus HB27 is a metal tolerant thermophile containing a set of genes involved in arsenic resistance which, differently from other microbes, are not organized into a single operon. They encode the proteins: arsenate reductase, TtArsC, arsenic efflux membrane transporter, TtArsX, and transcriptional repressor, TtSmtB...
May 18, 2018: Microbial Cell Factories
https://www.readbyqxmd.com/read/29775934/arsenic-speciation-dynamics-in-paddy-rice-soil-water-environment-sources-physico-chemical-and-biological-factors-a-review
#14
REVIEW
Prasanna Kumarathilaka, Saman Seneweera, Andrew Meharg, Jochen Bundschuh
Rice is the main staple carbohydrate source for billions of people worldwide. Natural geogenic and anthropogenic sources has led to high arsenic (As) concentrations in rice grains. This is because As is highly bioavailable to rice roots under conditions in which rice is cultivated. A multifaceted and interdisciplinary understanding, both of short-term and long-term effects, are required to identify spatial and temporal changes in As contamination levels in paddy soil-water systems. During flooding, soil pore waters are elevated in inorganic As compared to dryland cultivation systems, as anaerobism results in poorly mobile As(V), being reduced to highly mobile As(III)...
April 21, 2018: Water Research
https://www.readbyqxmd.com/read/29775821/vermiremediation-of-metal-loid-s-via-eichornia-crassipes-phytomass-extraction-a-sustainable-technique-for-plant-amelioration
#15
Arnab Majumdar, Anil Barla, Munish Kumar Upadhyay, Dibyarpita Ghosh, Punarbasu Chaudhuri, Sudhakar Srivastava, Sutapa Bose
Eichhornia crassipes (water hyacinth), imparts deficiency of soluble arsenic and other toxic metal (loid)s through rhizofiltration and phytoaccumulation. Without proper management strategy, this phytoremediation of metal (loid)s might fail and get reverted back to the environment, contaminating the nearby water bodies. This study, focused on bio-conversion of phytoremediating hyacinths, spiked with 100 times and greater arsenic, lead and cadmium concentrations than the average water contamination, ranging in 58...
May 15, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29775646/the-rna-binding-protein-ars2-supports-hematopoiesis-at-multiple-levels
#16
Seerat Elahi, Shawn M Egan, G Aaron Holling, Rachel L Kandefer, Michael J Nemeth, Scott H Olejniczak
Recent biochemical characterization of Arsenic resistance protein 2 (Ars2) has established it as central to determining the fate of nascent RNA polymerase II (RNAPII) transcripts. Through interactions with the nuclear 5'-7-methylguanosine (7mG) cap binding complex (CBC), Ars2 promotes co-transcriptional processing coupled with nuclear export or degradation of several classes of RNAPII transcripts, allowing for gene expression programs that facilitate rapid and sustained proliferation of immortalized cells in culture...
May 15, 2018: Experimental Hematology
https://www.readbyqxmd.com/read/29775499/synthesis-spectroscopic-characterization-and-redox-reactivity-of-a-cyclic-alkyl-amino-carbene-derived-arsamethine-cyanine-dye
#17
Kortney M Melancon, M Brenton Gildner, Todd W Hudnall
In our efforts to prepare a diarsenic allotrope supported by two cyclic alkyl amino carbene (CAAC) ligands we stumbled upon the serendipitous synthesis of the first carbene-supported chloroarsinidene 3 which has been fully characterized by a combination of NMR spectroscopic and XRD methods. Although further reduction of 3 was not possible, we found that addition of a second equivalent of CAAC in refluxing toluene afforded the first example of a crystallographically characterized arsamethine cyanine dye (4)...
May 18, 2018: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29775096/silicon-alleviates-arsenic-induced-toxicity-in-wheat-through-vacuolar-sequestration-and-ros-scavenging
#18
Md Monayem Hossain, Most Amena Khatun, Md Najmul Haque, Md Azizul Bari, Md Firoz Alam, Abul Mandal, Ahmad Humayan Kabir
Arsenic (As) is a phytotoxic element causing health hazards. This work investigates whether and how silicon (Si) alleviates As toxicity in wheat. The addition of Si under As-stress significantly improved morphophysiological characteristics, total protein, and membrane stability compared to As-stressed plants, suggesting that Si does have critical roles in As detoxification in wheat. Analysis of arsenate reductase activity and phytosiderophore (PS) release reveals their no involvement in the Si-mediated alleviation of As in wheat...
July 3, 2018: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/29774349/role-of-arsenic-3-oxidation-state-methyltransferase-in-arsenic-mediated-apl-treatment-an-in-vitro-investigation
#19
Yasen Maimaitiyiming, Chao Wang, Shi Xu, Khairul Islam, Ye Jia Chen, Chang Yang, Qian Qian Wang, Hua Naranmandura
Arsenic (+3 oxidation state) methyltransferase (AS3MT) is a key enzyme responsible for arsenic metabolism in humans, which facilitates conversion of arsenic trioxide (As2O3) to more reactive metabolites such as monomethylarsonous acid (MMAIII) and dimethylarsinous acid (DMAIII). However, it is unclear whether the biotransformation of arsenic by AS3MT contributes to the promotion of acute promyelocytic leukemia (APL) therapy. In order to understand the probable role of AS3MT in APL patients, we evaluated the effects of arsenite (iAsIII) and three mixed arsenicals (i...
May 18, 2018: Metallomics: Integrated Biometal Science
https://www.readbyqxmd.com/read/29774049/bioreactor-microbial-ecosystems-with-differentiated-methanogenic-phenol-biodegradation-and-competitive-metabolic-pathways-unraveled-with-genome-resolved-metagenomics
#20
Feng Ju, Yubo Wang, Tong Zhang
Background: Methanogenic biodegradation of aromatic compounds depends on syntrophic metabolism. However, metabolic enzymes and pathways of uncultured microorganisms and their ecological interactions with methanogenic consortia are unknown because of their resistance to isolation and limited genomic information. Results: Genome-resolved metagenomics approaches were used to reconstruct and dissect 23 prokaryotic genomes from 37 and 20 °C methanogenic phenol-degrading reactors...
2018: Biotechnology for Biofuels
keyword
keyword
20031
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"