Dma Thioarsenicals
Dma Thioarsenicals - Related Videos
06:23
Preparation of DMMTAV and DMDTAV Using DMAV for Environmental Applications: Synthesis, Purification, and Confirmation
0 Views •
Cited by 4 •
2018
This article presents modified experimental protocols for dimethylmonothioarsinic acid (DMMTAV) and dimethyldithioarsinic acid (DMDTAV) synthesis, inducing dimethylarsinic acid (DMAV) thiolation through mixing of DMAV, Na2S, and H2SO4. The modified protocol provides an experimental guideline, thereby overcoming limitations of the synthesis steps that could have caused experimental failures in quantitative analysis.
11:18
A Practical Guide on Coupling a Scanning Mobility Sizer and Inductively Coupled Plasma Mass Spectrometer (SMPS-ICPMS)
0 Views •
Cited by 9 •
2017
In this work a practical guide is provided, describing the different steps to establish the coupling of SMPS and ICPMS systems, and how to use them. Three descriptive examples are presented.
07:29
A high-throughput method to globally study the organelle morphology in S. cerevisiae
0 Views •
Cited by 2 •
2009
GFP-fusion proteins are widely used to visualize organelles by confocal microscopy. However, screening for mutations that affect the morphology of organelles generally requires individual mutagenesis and is time consuming. Here, we demonstrate a method to simultaneously incorporate organelle-GFP markers in almost 5,000 non-essential genes in yeast.
09:39
Assessing Specificity of Anticancer Drugs In Vitro
0 Views •
Cited by 8 •
2016
The goal of this protocol is to assess specificity of anticancer drugs in vitro using mixed cultures containing both tumor and non-tumor cells.
06:52
Experimental Column Setup for Studying Anaerobic Biogeochemical Interactions Between Iron (Oxy)Hydroxides, Trace Elements, and Bacteria
0 Views •
Cited by 3 •
2017
Fate and speciation of arsenic and mercury in aquifers are closely related to physio-chemical conditions and microbial activity. Here, we present an original experimental column setup that mimics an aquifer and enables a better understanding of trace element biogeochemistry in anoxic conditions. Two examples are presented, combining geochemical and microbiological approaches.
FAQs
The sulfur-for-oxygen substitution changes the chemical identity of DMA and can alter how the resulting compound behaves in the environment. In particular, sulfurization may affect solubility, mobility, stability, and toxicity. Those changes matter because an arsenic transformation product can move through or persist in soils, sediments, and aquatic systems differently from its precursor.
Formation is favored when reducing conditions coincide with available sulfide, while microbial activity and sulfur chemistry help drive the relevant methylation and sulfurization reactions. Thus, oxygen status, sulfide-rich conditions, and biological activity are important interpretive variables. Considering them together helps explain why thioarsenical formation may vary among environmental compartments.
Dimethylmonothioarsinic acid and dimethyldithioarsinic acid represent different sulfur-containing forms associated with DMA transformation. Distinguishing these examples is useful because environmental studies may need to track more than total arsenic or DMA alone. Compound-specific observations can reveal which transformation products are present and support more accurate interpretation of arsenic cycling and contaminant behavior.
Effects are relevant across soils, sediments, and aquatic systems, but the observed outcome depends on the local chemical and biological setting. Changes in solubility can influence whether compounds remain associated with a material or enter surrounding water, while mobility and stability affect transport and persistence. Toxicity changes are also important for evaluating ecological and exposure consequences.
Monitoring these compounds adds transformation-product information to measurements of arsenic and DMA. Detecting dimethylmonothioarsinic acid or dimethyldithioarsinic acid can indicate that sulfur-related processes are influencing arsenic cycling in a sampled soil, sediment, or aquatic system. Interpreting those findings alongside local conditions helps explain contaminant behavior rather than treating arsenic as a single unchanging form.
Risk evaluations should account for the possibility that transformation changes toxicity as well as transport-related properties. A compound that differs in stability, mobility, or solubility can alter environmental distribution, while altered toxicity can affect the significance of ecological or human exposure. Including thioarsenicals therefore supports a more complete assessment of arsenic contamination and its potential effects.