PHB-based films as matrices for pesticides

Savenkova, Ludmila; Gercberga, Z; Muter, Olga; Nikolaeva, V. G.; Dzene, Anda; Tupureina, Velta

doi:10.1016/s0032-9592(01)00263-1

Cited by 31 publications

(16 citation statements)

References 7 publications

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“…It is difficult to define the effects of all factors which exist in the environment. However, it is noteworthy that enzymes such as depolymerases, which cause PHA biodegradation, are secreted from a large variety of microorganisms widespread in natural environments [ 3 , 4 ] and these depolymerases may accelerate the release of pesticide from pesticide-PHA oligomer conjugates.…”

Section: Resultsmentioning

confidence: 99%

“…The replacement of conventional forms of pesticides with controlled-release formulations that show higher resistance to weather conditions is of interest. Polyhydroxyalkanoates have been examined as physical carriers and, for example, PHB-based polymeric matrices for Ronilan and Sumilex pesticides [ 3 ], poly(3-hydroxybutyrate- co -3-hydroxyvalerate) for sustained-release formulations of the herbicide Zellek Super in the form of films [ 4 ] or poly(3-hydroxybutyrate- co -3-hydroxyvalerate) microspheres loaded with atrazine herbicide [ 5 ] have been described. In these admixture systems, active compounds are mixed with polymers and are released over the course of several days.…”

Section: Introductionmentioning

confidence: 99%

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Transesterification of PHA to Oligomers Covalently Bonded with (Bio)Active Compounds Containing Either Carboxyl or Hydroxyl Functionalities

2015

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This manuscript presents the synthesis and structural characterisation of novel biodegradable polymeric controlled-release systems of pesticides with potentially higher resistance to weather conditions in comparison to conventional forms of pesticides. Two methods for the preparation of pesticide-oligomer conjugates using the transesterification reaction were developed. The first method of obtaining conjugates, which consist of bioactive compounds with the carboxyl group and polyhydroxyalkanoates (PHAs) oligomers, is "one-pot" transesterification. In the second method, conjugates of bioactive compounds with hydroxyl group and polyhydroxyalkanoates oligomers were obtained in two-step method, through cyclic poly(3-hydroxybutyrate) oligomers. The obtained pesticide-PHA conjugates were comprehensively characterised using GPC, 1H NMR and mass spectrometry techniques. The structural characterisation of the obtained products at the molecular level with the aid of mass spectrometry confirmed that both of the synthetic strategies employed led to the formation of conjugates in which selected pesticides were covalently bonded to PHA oligomers via a hydrolysable ester bond.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Transesterification of PHA to Oligomers Covalently Bonded with (Bio)Active Compounds Containing Either Carboxyl or Hydroxyl Functionalities

2015

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“…To avoid dramatically environmental problem by direct applying, a production of the Cu‐based pesticide film would serve as a practical way for controlling pest snail and reducing the environmental impact. For example, Savenkova et al reported that reduction of chemical pesticides could be accomplished by immobilizing the pesticides into a biodegradable polymeric matrix. This way could possess not only reducing pesticide contamination in the environment but also prolonging pesticide action due to controlled release mechanism.…”

Section: Introductionmentioning

confidence: 99%

Modification of chitosan onto PE by irradiation in salt solutions and possible use as Cu²⁺ complex film for pest snail control

Pasanphan

Haema

Tangthong

et al. 2014

J of Applied Polymer Sci

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Chitosan‐grafted‐polyethylene (CS‐g‐PE) film was prepared using simultaneous radiation‐inducing grafting technique. The copper ion (Cu2+) adsorptivity on the CS‐g‐PE film was determined. The CS‐hydroxybenzyltriazole (CS‐HOBt), CS‐N‐hydroxysuccinimide (CS‐NHS), CS‐acetic acid (CS‐HOAc), and CS‐glutathione (CS‐GSH) were used as CS‐salts in aqueous solutions. Among these grafting solution systems, the CS‐g‐PE film prepared from CS‐HOBt solution showed the greatest grafting amount and highest Cu2+ adsorptivity, up to 30.2% (1.51 ppm, 7.56 µg cm−2). The effects of the CS‐HOBt concentration and mixing solution on the grafting amount were also observed to clarify their efficacies to assist radiation‐induced grafting reaction. SEM/EDS mapping, ICP and XRF were used to clarify the Cu2+ adsorption capacity of the CS‐g‐PE film and the stability of Cu2+ on the CS‐g‐PE complex film. The Cu2+ showed its stability on the CS‐g‐PE film at room temperature in neutral and basic solutions. The Cu2+‐‐‐CS‐g‐PE complex film reduced pest snail breeding as high as 54%. The success of this observation is a new approach to modify PE surface with a functional biopolymer, CS containing Cu2+ complex for controlling pest snail breeding. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 41204.

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“…PHAs are synthesized by prokaryotes as energy and carbon storage; they are degraded both intracellularly and extracellularly to safe products (CO 2 and H 2 O) by soil and water microflora (Sudesh et al 2000;Jendrossek 2001). Although this is a relatively new application of PHAs, they have been successfully used to embed herbicides (Prudnikova et al 2013;Boyandin et al 2016;Volova et al 2016a,b), fungicides (Savenkova et al 2002;Volova et al 2016c,d), and nitrogen fertilizers (Volova et al 2016e).…”

Section: Discussionmentioning

confidence: 99%

Fungicidal activity of slow-release P(3HB)/TEB formulations in wheat plant communities infected by Fusarium moniliforme

Volova

Prudnikova

Zhila

2017

Environ Sci Pollut Res

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Fungicidal activity of experimental tebuconazole (TEB) formulations was investigated in laboratory soil ecosystems in wheat plant communities infected by Fusarium moniliforme. TEB was embedded in the matrix of poly-3-hydroxybutyrate, shaped as films and microgranules. These formulations were buried in the soil with wheat plants, and their efficacy was compared with that of commercial formulation Raxil and with the effect of pre-sowing treatment of seeds. In the experiment with the initially infected seeds and a relatively low level of natural soil infection caused by Fusarium fungi, the effects of the experimental P(3HB)/TEB formulations and Raxil were comparable. However, when the level of soil infection was increased by adding F. moniliforme spores, P(3HB)/TEB granules and films reduced the total counts of fungi and the abundance of F. moniliforme more effectively than Raxil. Seed treatment or soil treatment with Raxil solution showed an increase in the percentage of rot-damaged roots in the later stages of the experiment. In the early stage (between days 10 and 20), the percentage of rot-damaged roots in the soil with TEB embedded in the slowly degraded P(3HB) matrix was similar to that in the soil with Raxil. However, the efficacy of P(3HB)/TEB formulations lasted longer, and in later stages (between days 20 and 30), the percentage of rot-damaged roots in that group did not grow. In experiments with different TEB formulations and, hence, different fungicidal activities, the increase in plant biomass was 15-17 to 40-60% higher than in the groups where TEB was applied by using conventional techniques.

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PHB-based films as matrices for pesticides

Cited by 31 publications

References 7 publications

Transesterification of PHA to Oligomers Covalently Bonded with (Bio)Active Compounds Containing Either Carboxyl or Hydroxyl Functionalities

Transesterification of PHA to Oligomers Covalently Bonded with (Bio)Active Compounds Containing Either Carboxyl or Hydroxyl Functionalities

Modification of chitosan onto PE by irradiation in salt solutions and possible use as Cu²⁺ complex film for pest snail control

Fungicidal activity of slow-release P(3HB)/TEB formulations in wheat plant communities infected by Fusarium moniliforme

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PHB-based films as matrices for pesticides

Cited by 31 publications

References 7 publications

Transesterification of PHA to Oligomers Covalently Bonded with (Bio)Active Compounds Containing Either Carboxyl or Hydroxyl Functionalities

Transesterification of PHA to Oligomers Covalently Bonded with (Bio)Active Compounds Containing Either Carboxyl or Hydroxyl Functionalities

Modification of chitosan onto PE by irradiation in salt solutions and possible use as Cu2+ complex film for pest snail control

Fungicidal activity of slow-release P(3HB)/TEB formulations in wheat plant communities infected by Fusarium moniliforme

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Modification of chitosan onto PE by irradiation in salt solutions and possible use as Cu²⁺ complex film for pest snail control