14
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: not found
      • Article: not found

      Controlled pesticide release from biodegradable polymers

      Read this article at

      ScienceOpenPublisher
      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Related collections

          Most cited references138

          • Record: found
          • Abstract: found
          • Article: not found

          Hydrogels in controlled release formulations: network design and mathematical modeling.

          Over the past few decades, advances in hydrogel technologies have spurred development in many biomedical applications including controlled drug delivery. Many novel hydrogel-based delivery matrices have been designed and fabricated to fulfill the ever-increasing needs of the pharmaceutical and medical fields. Mathematical modeling plays an important role in facilitating hydrogel network design by identifying key parameters and molecule release mechanisms. The objective of this article is to review the fundamentals and recent advances in hydrogel network design as well as mathematical modeling approaches related to controlled molecule release from hydrogels. In the first section, the niche roles of hydrogels in controlled release, molecule release mechanisms, and hydrogel design criteria for controlled release applications are discussed. Novel hydrogel systems for drug delivery including biodegradable, smart, and biomimetic hydrogels are reviewed in the second section. Several mechanisms have been elucidated to describe molecule release from polymer hydrogel systems including diffusion, swelling, and chemically-controlled release. The focus of the final part of this article is discussion of emerging hydrogel delivery systems and challenges associated with modeling the performance of these devices.
            Bookmark
            • Record: found
            • Abstract: found
            • Article: not found

            Polymer microspheres for controlled drug release.

            Polymer microspheres can be employed to deliver medication in a rate-controlled and sometimes targeted manner. Medication is released from a microsphere by drug leaching from the polymer or by degradation of the polymer matrix. Since the rate of drug release is controlled by these two factors, it is important to understand the physical and chemical properties of the releasing medium. This review presents the methods used in the preparation of microspheres from monomers or from linear polymers and discusses the physio-chemical properties that affect the formation, structure, and morphology of the spheres. Topics including the effects of molecular weight, blended spheres, crystallinity, drug distribution, porosity, and sphere size are discussed in relation to the characteristics of the release process. Added control over release profiles can be obtained by the employment of core-shell systems and pH-sensitive spheres; the enhancements presented by such systems are discussed through literature examples.
              Bookmark
              • Record: found
              • Abstract: not found
              • Article: not found

              In situpoly(urea-formaldehyde) microencapsulation of dicyclopentadiene

                Bookmark

                Author and article information

                Journal
                Central European Journal of Chemistry
                cent.eur.j.chem.
                Walter de Gruyter GmbH
                1895-1066
                1644-3624
                April 2014
                January 16 2014
                : 12
                : 4
                : 453-469
                Article
                10.2478/s11532-013-0405-2
                ed21795a-0815-46e9-ab3f-b419682ff954
                © 2014
                History

                Comments

                Comment on this article