Degradable Polyhydroxyalkanoates as Herbicide Carriers
Svetlana V. Prudnikova,Anatoly N. Boyandin,Galina S. Kalacheva,Anthony J. Sinskey,Anthony J. Sinskey +4 more
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TLDR
In this paper, the authors demonstrate that biodegradable polyhydroxyalkanoates can be used effectively to construct environmentally friendly sustained-release PHA-herbicide systems that can be placed into the soil together with seeds.Abstract:
The biodegradable polymer poly(3-hydroxybutyrate-co-3-hydroxyvalerate) has been used to design experimental sustained-release formulations of the herbicide Zellek Super in the form of films and microgranules. The kinetics of polymer degradation and the dynamics of herbicide release show that the rate and extent of herbicide release from the polymer matrix into the soil depends on the geometry of the carrier and the proportion of the pesticide loaded into it (polymer/pesticide mass ratio). Experiments with the creeping bentgrass (Agrostis stolonifera L.) show that the formulations of the herbicide Zellek Super constructed as microgranules and films can be successfully used to suppress the growth of grasses. This study is the first to demonstrate that biodegradable polyhydroxyalkanoates can be used effectively to construct environmentally friendly sustained-release PHA-herbicide systems that can be placed into the soil together with seeds.read more
Citations
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Journal ArticleDOI
Biodegradable poly(3-hydroxybutyrate-co-4-hydroxybutyrate) microcapsules for controlled release of trifluralin with improved photostability and herbicidal activity.
TL;DR: Compared to conventional trifluralin formulation of emulsifiable concentrate, trif luralin microcapsules exhibited significantly improved photostability and herbicidal activity against target weed barnyardgrass, demonstrating that microencapsulation with PHB could dramaticlly improve the effective utilization rate and decrease the dosage of such agricultural chemicals.
Journal ArticleDOI
Constructing Slow-Release Formulations of Metribuzin Based on Degradable Poly(3-hydroxybutyrate).
TL;DR: The study shows that herbicide release can be controlled by the matrix formulation and application of these long-term formulations will make it possible to reduce environmental release of chemicals, which will restrict the rate of their accumulation in trophic chains of ecosystems and abate their adverse effects on the biosphere.
Journal ArticleDOI
Constructing herbicide metribuzin sustained-release formulations based on the natural polymer poly-3-hydroxybutyrate as a degradable matrix
Tatiana G. Volova,Natalia O. Zhila,Olga N. Vinogradova,Elena D. Nikolaeva,Evgeniy G. Kiselev,Anna A. Shumilova,Anna M. Shershneva,Ekaterina I. Shishatskaya +7 more
TL;DR: Physical P(3HB)/MET mixtures in the form of solutions, powders, and emulsions were used to construct different metribuzin formulations and the stability of these formulations incubated in sterile water in vitro for long periods of time was proved.
Journal ArticleDOI
Biodegradable poly-3-hydroxybutyrate as a fertiliser carrier.
TL;DR: Slow-release nitrogen formulations developed in this study can be buried in soil together with seeds preventing nitrogen deficiency and the use of such slow-release formulations can decrease the amounts of chemicals in the environment and prevent their adverse effects on the biosphere.
References
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Journal ArticleDOI
Synthesis, structure and properties of polyhydroxyalkanoates: biological polyesters
Kumar Sudesh,H Abe,Yoshiharu Doi +2 more
TL;DR: This review attempts to bring together the biochemical and physicochemical aspects of PHA along with new perspectives on its potential therapeutic applications to show that the polymer's physical properties can be regulated to a great extent.
Journal ArticleDOI
Microbial degradation of polyhydroxyalkanoates.
Dieter Jendrossek,René Handrick +1 more
TL;DR: This contribution provides a summary of the biochemical and molecular biological characteristics of e-PHA depolymerases and focuses on the intracellular mobilization of storage PHA by intracesllular PHA depolemerases (i-P HA depolyMERases) of PHA-accumulating bacteria.
Journal ArticleDOI
Degradation of microbial polyesters
TL;DR: This review proposes an application of a new isolated, thermophilic PHB-degrading microorganism, Streptomyces strain MG, for producing pure monomers of PHA and useful chemicals, including d-3-hydroxycarboxylic acids, by enzymatic degradation of PHB.
Journal ArticleDOI
Glutaraldehyde crosslinked sodium alginate beads containing liquid pesticide for soil application
TL;DR: Experimental results on the successful encapsulation of a natural liquid pesticide 'neem (Azadirachta Indica A. Juss.) seed oil' hereafter designated as NSO, using sodium alginate as a controlled release polymer after crosslinking with glutaraldehyde (GA) is presented.
Journal ArticleDOI
Ability of the phototrophic bacterium Rhodospirillum rubrum to produce various poly (β-hydroxyalkanoates): Potential sources for biodegradable polyesters
TL;DR: The results demonstrate the metabolic flexibility of R. rubrum to form many different types of polyesters which might substitute plastics synthesized from petrochemicals.
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