A semiquantitative method for the detection of microcapsule residues resulting from microencapsulated pesticide applications

Blackmer, Gary L.; Reynolds, Rex H.

doi:10.1021/jf60211a033

Cited by 7 publications

(5 citation statements)

References 6 publications

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“…15 Several interesting materials have recently been developed using microuidics, for example thermoresponsive poly(N-isopropylacrylamide) (PNIPAAm) spheres, 24 and capsules for the controlled release of encapsulated drugs, 25 cosmetics 26 and pesticides. 27 However, to the best of our knowledge, microuidics have never earlier been used to create capsules based on native cellulose, the most abundant and renewable polymer on Earth. 28,29 This might be explained by the insolubility of native cellulose in most common solvents and its high molecular weight, which, when dissolved, results in highly viscous solutions already at about 1.5 wt% of cellulose.…”

Section: Introductionmentioning

confidence: 99%

Native and functionalized micrometre-sized cellulose capsules prepared by microfluidic flow focusing

et al. 2014

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Section: Introductionmentioning

confidence: 99%

Native and functionalized micrometre-sized cellulose capsules prepared by microfluidic flow focusing

et al. 2014

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“…A microcapsule is a particle or a droplet with a well-defined shell and a solid, liquid, or gaseous core . Microcapsules with hydrogel shells that are formed by biopolymers are used for the encapsulation and controlled release of drugs, cosmetics, pesticides, and food additives . Capsules of biopolymers show promising applications in the encapsulation of transplanted cells: a membrane protects the cells from rejection by the immune system and allows transplantation without the need for immunosuppression, while a liquid core provides the cells with a microenvironment that ensures their unrestricted growth …”

Section: Introductionmentioning

confidence: 99%

Microfluidic Production of Biopolymer Microcapsules with Controlled Morphology

et al. 2006

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We report a microfluidic approach to generating capsules of biopolymer hydrogels. Droplets of an aqueous solution of a biopolymer were emulsified in an organic phase comprising a cross-linking agent. Polymer gelation was achieved in situ (on a microfluidic chip) by diffusion-controlled ionic cross-linking of the biopolymer, following the transfer of the cross-linking agent from the continuous phase to the droplets. Gelation was quenched by collecting particles in a large pool of cross-linking agent-free liquid. The structure of microgels (from capsules to gradient microgels to particles with a uniform structure) was controlled by varying the time of residence of droplets on the microfluidic chip and the concentration of the cross-linking agent in the continuous phase. We demonstrated the encapsulation of a controlled number of polystyrene beads in the microgel capsules. The described approach was applied to the preparation of capsules of several polysaccharides such as alginate, kappa-carrageenan, and carboxymethylcellulose.

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“…Biomicrogels in the size range from several micrometers to hundreds of micrometers are used for the encapsulation of functional species in the cosmetics, nutrition, pesticide, and food industries, [1][2][3] and in drug delivery. [4] A large area of applications of biomicrogels is the encapsulation of bioactive species, e.g., cells.…”

Section: Introductionmentioning

confidence: 99%

Exploring Microfluidic Routes to Microgels of Biological Polymers

Zhang

Tumarkin

Sullan

et al. 2007

Macromol. Rapid Commun.

206

219

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Polymer microgels in the size range from several micrometers to hundreds of micrometers are used in the pharmaceutical, cosmetics, nutrition, pesticide, and food industries, as well as in the encapsulation of cells. To date, a broad range of strategies for the generation of polymer microgels exist, however, these methods involve multistage processes, do not utilize biocompatible components or do not allow precise control of the dimensions and internal structure of the microgels. Recently, microfluidic strategies for the production of polymer particles have offered precise control over the shapes, morphologies, and size distributions of polymer colloids. This paper discusses the most recent results obtained by the authors in the area of the microfluidic production of biopolymer microgels. It provides a brief review of the microfluidic methods for the continuous synthesis and fabrication of microgels, sets the criteria for the successful microfluidic generation of biomicrogels, and describes two methods for the preparation of microgels by microfluidic means. The article concludes with a summary and an outlook.magnified image

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A semiquantitative method for the detection of microcapsule residues resulting from microencapsulated pesticide applications

Cited by 7 publications

References 6 publications

Native and functionalized micrometre-sized cellulose capsules prepared by microfluidic flow focusing

Native and functionalized micrometre-sized cellulose capsules prepared by microfluidic flow focusing

Microfluidic Production of Biopolymer Microcapsules with Controlled Morphology

Exploring Microfluidic Routes to Microgels of Biological Polymers

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