In order to determine whether ClpXP-mediated proteolysis is a common mechanism used to regulate the chemotaxis machinery during the cell cycle of Caulobacter crescentus, we have characterized a soluble cytoplasmic chemoreceptor, McpB. The mcpB gene lies adjacent to the major chemotaxis operon, which encodes 12 chemotaxis proteins, including the membrane chemoreceptor McpA. Like McpA, McpB posse...

The degradation behaviour of 2,4-D and MCPA in four types of soil were determined from measurements of 14CO2 evolution over a period of 100 days. The total C-organic volatile compounds evaporated from the soils during the experimental period and the residual C in the soils at the end of the incubation period was also determined. The degree of mineralization was different for tested pesticides, ...

Angelica urumiensis Mozaff. and Eryngium iranicum Mozaff. are described as new species from Iran. Aphanopleura trachysperma Boiss. and Pastinaca sativa L. subsp. urens (Req. ex Gordon) Čelak are reported as new records from Iran.

The benzonitrile herbicides bromoxynil, chloroxynil, dichlobenil, and ioxynil have been used actively worldwide to control weeds in agriculture since 1970s. Even though dichlobenil is prohibited in EU since 2008, studies addressing the fate of benzonitrile herbicides in the environment show that some metabolites of these herbicides are very persistent. We tested the cytotoxic effects of benzoni...

A new, robust and simple method is proposed for the chemiluminescent determination of the pesticide Bromoxynil. The empirical procedure is performed with the aid of a flow-injection manifold provided with an on-line photo-reactor to obtain chemiluminescent photofragments. After a period of 12 s of irradiation with an 8 W low-pressure mercury lamp, a chemiluminescent oxidation was performed with...

Abstract The complementary modes of action 4-hydroxyphenylpyruvate dioxygenase (HPPD) and photosystem II (PSII) inhibitors have been credited for the synergistic weed control improvement several species. Recent research discovered that reactive oxygen species (ROS) generation subsequent lipid peroxidation is cause cell death by glutamine synthetase inhibitor glufosinate. Therefore, a basis syne...

4-chloro-2-methylphenoxy acetic acid (mcpa) is one of the most important pesticides which is extensively used to control weeds in arable farmland. exposure to this compound occurs in general population and persons who occupationally handle it. the aim of this present work was the preparation of mcpa imprinting polymer and its application as a selective sample preparation technique for trace det...

Abstract The intercalation of 2-methyl-4-chlorophenoxyacetic acid (MCPA) herbicide into the interlayer matrix calcium–aluminium layered double hydroxide (CaAl LDH) host has been successfully done via co-precipitation method to form CaAl-MCPA nanocomposite, proposing an eco-friendly alternative with adjusted delivery system for application. process is supported by powder X-ray diffraction analys...

The production of activated carbons (ACs) from dirty plastic wastes derived the mechanical/biological treatment urban solid wastes, disposable plastics and used in agriculture is reported. use these precursors innovative contributes to circular economy by valorization that are usually disposed landfills. ACs were produced physical activation, with air or CO2, chemical KOH K2CO3. presented a BET...