orabase and rosin

The increasing world-wide demand for food has prompted the development of efficient and environmentally friendly pesticide formulations. In this article, we have prepared CMC-g-PRSG carrier based on two compounds from natural materials carboxymethyl cellulose (CMC) and rosin (RS). The model pesticide avermectin (AVM) was encapsulated through hydrophobic interaction, and self-assembled to form nanopesticide AVM@CMC-g-PRSG with an average particle size of 167 nm. The prepared nanopesticide displays enhanced dispersibility and stability of AVM in water, and can effectively adhere to the leaves to prevent loss. The release rate of AVM encapsulated in the nanocarrier can be controlled by adjusting pH, and AVM half-life under ultraviolet radiation shows a 3-fold increase allowing control of pests for prolonged periods of time in practical applications. Biological safety tests showed that AVM@CMC-g-PRSG effectively reduces the toxicity of AVM to aquatic animals. Therefore, the cheap and degradable carrier CMC-g-PRSG can improve the effect of hydrophobic pesticides.

Topics: Animals; Carboxymethylcellulose Sodium; Drug Carriers; Drug Liberation; Half-Life; Hydrogen-Ion Concentration; Hydrophobic and Hydrophilic Interactions; Ivermectin; Larva; Nanoparticles; Particle Size; Pest Control; Pesticides; Resins, Plant; Ultraviolet Rays; Zebrafish

Adequate release of 5-ASA in colon is challenging as it easily permeates at the acidic pH of the upper gastrointestinal tract. Targeting delayed release of 5-ASA at acidic pH, Carboxymethyl cellulose-rosin gum hybrid nanoparticles (CR

Topics: Carboxymethylcellulose Sodium; Drug Carriers; Drug Delivery Systems; Drug Liberation; Humans; Hydrogen-Ion Concentration; Kinetics; Microscopy, Electron, Scanning; Nanoparticles; Resins, Plant; Spectroscopy, Fourier Transform Infrared; X-Ray Diffraction

Hydrocolloid wound dressings have been in use for nearly two decades, and have rarely caused allergic contact dermatitis. DuoDERM E (DuoDERM CGF) is a newer version of DuoDERM (ConvaTec Ltd, a division of Bristol-Myers Squibb Co, Princeton, NJ) that contains a sensitizing derivative of colophony.. We describe three patients who developed eczematous lesions under this type of wound covering.. The patients were patch tested to the European standard series, to a glues and adhesives series, and to pieces of various adhesive dressings.. The patients displayed positive patch tests to colophony and to DuoDERM E or DuoDERM CGF hydrocolloid dressings.. These dressings contain the pentaerythritol ester of hydrogenated rosin as a tackifying agent, and this substance retains the sensitizing potential of colophony. The addition of this compound is an important change that may negatively alter the good safety record of ConvaTec dressings.

Topics: Adult; Aged; Bandages, Hydrocolloid; Carboxymethylcellulose Sodium; Colloids; Dermatitis, Allergic Contact; Female; Humans; Male; Occlusive Dressings; Patch Tests; Resins, Plant