13. CONTROLLED RELEASE OF THEOPHYLLINE-CHITOSAN COMPOSITE PARTICLES PREPARED USING SUPERCRITICAL ASSISTED ATOMIZATION

Abstract This study investigated the formation of composite particles of chitosan (CS) and theophylline (TPH) via supercritical assisted atomization (SAA) using aqueous ethanol (50%, v/v) as the solvent and supercritical CO2 as the spraying medium. According to XRD, DSC, and FTIR analyses, the crystal form of the SAA-treated TPH from the as-received TPH was

Braz. J. Chem. Eng.. Publicado em: 30/09/2019

14. Mass Variation Rate, in Acidic Environment, of Polyhydroxybutyrate and Chitosan matrices with Potential Application as Controlled Drug Delivery System

Polymers such as the biocompatible polyhydroxybutyrate (PHB) and the polysaccharide chitosan (Chi), a pH-sensitive polymer, have been studied for drug delivery applications and scaffolds production. In this work, matrices of PHB and Chi were produced by compression molding (SPHB-Chi) and loaded with a broad-spectrum biocide chlorhexidine (CHX) (SPHB-Chi-CHX)

Mat. Res.. Publicado em: 30/09/2019

15. Development and in vitro/in vivo evaluation of thermo-sensitive in situ gelling systems for ocular allergy

Ocular allergy is one of the most common disorders of the eye surface. Following diagnosis this condition is typically treated with preparations containing antihistamines. However, anatomy of the eye and its natural protective mechanisms create challenges for ocular drug delivery. Rapid elimination of antihistamine substances due to short residency times fol

Braz. J. Pharm. Sci.. Publicado em: 23/09/2019

16. Amphotericin-B and vancomycin-loaded chitosan nanofiber for antifungal and antibacterial application

In the present study, a mucoadhesive non-woven fiber mat (d= 116 nm) was fabricated by the electrospinning method using chitosan (80% Wt), polyethylene oxide (10% Wt), cysteine (4% Wt) and drugs (6% Wt), respectively. In addition, a comparative study was conducted to define effect of drugs and mucoadhesive agent on the nanofiber formation. FTIR, SEM, DSC and

Braz. J. Pharm. Sci.. Publicado em: 09/09/2019

17. Controlled-Release Fertilizer on Growth of Melanoxylon brauna Schott Seedlings

ABSTRACT Melanoxylon brauna is a tree species native to the Atlantic Forest of high ecological and economic value. The objective of this study was to evaluate the growth and nutritional status of seedlings of two Melanoxylon brauna cultivars grown in substrate with different controlled-release fertilizer doses (CRF). The experiment was arranged in a randomiz

Floresta Ambient.. Publicado em: 05/09/2019

18. Controlled Release of TBH Herbicide Encapsulated on Ca-ALG Microparticles: Leaching and Phytointoxication Plants

RESUMO: O objetivo deste trabalho foi demonstrar um estudo detalhado da liberação controlada do herbicida Tebuthiuron (TBH) encapsulado em micropartículas de alginato de cálcio (Ca-ALG), para avaliar a fitotoxicidade em diferentes concentrações do herbicida (4, 6 e 8 g L-1) e sua correlação com a profundidade de lixiviação usando plantas bioindicad

Planta daninha. Publicado em: 19/08/2019

19. Allelopathic effects of the aquatic macrophyte Ceratophyllum demersum L. on phytoplankton species: contrasting effects between cyanobacteria and chlorophytes

Resumo Objetivo Avaliar os efeitos alelopáticos da macrófita submersa Ceratophyllum demersum sobre quatro cepas de espécies fitoplanctônicas: duas cianobactérias (Microcystis aeruginosa - produtora de microcistinas e M. panniformis - não produtora) e duas clorófitas (Ankistrodesmus falcatus e Raphidocelis subcapitata). Métodos Foi realizado um expe

Acta Limnol. Bras.. Publicado em: 08/08/2019

20. SYNTHESIS, CHARACTERIZATION AND in vitro CYTOTOXICITY OF Acacia mearnsii PROANTHOCYANIDIN LOADED PLGA MICROPARTICLES

ABSTRACT One of the highlighted areas in the development of new materials is the generation of micro- and nanoparticles as drug carriers which allow the progress in formulations with the ability to release active agents in a controlled way. The proanthocyanidins (PAC) extracted from the bark of the Black Wattle have stood out for their biological activities.

Braz. J. Chem. Eng.. Publicado em: 15/07/2019

21. Biodegradable oil-based polymeric coatings on urea fertilizer: N release kinetic transformations of urea in soil

ABSTRACT: Polymer coatings are used to control the rate of release of plant available nutrients from fertilizers as well as to reduce nutrient losses such as ammonia (NH3) volatilization. Although the literature presents several examples of materials used to coat urea, little is known about nitrogen (N) release properties such as the mechanism involved and p

Sci. agric. (Piracicaba, Braz.). Publicado em: 01/07/2019

22. A System to improve the management of 5G and IoT Networks by determining the Mobile Position

Abstract The interference in adjacent cells and the control of the boundaries have being vastly investigated since the conception of the first cell phone networks. A very large number of small cells are required for new 5G mobile networks, and therefore it is even more important to determine the correct mobile station positioning as well as the control bound

J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 19/06/2019

23. A brief review on hydroxyapatite production and use in biomedicine

Resumo A hidroxiapatita (HAp) é uma biocerâmica amplamente estudada devido à sua similaridade química com o componente mineral dos ossos. Além disso, é biocompatível, bioativa e termodinamicamente estável no fluido corporal, o que a coloca como um material atraente para uma ampla gama de aplicações no campo biomédico. Diversos esforços têm sido

Cerâmica. Publicado em: 06/06/2019

24. Growth and mouth breathers,

Resumo Objetivo: Avaliar a relação entre respiração oral e distúrbios do crescimento entre crianças e adolescentes. Fonte de dados: Busca na base de dados do MEDLINE, nos últimos 10 anos, com o emprego dos seguintes termos: "mouth breathing" ou "adenotonsilar hypertrophy", ou "allergic rhinitis" ou sleep disturbance" AND "growth impairment" ou "grow

J. Pediatr. (Rio J.). Publicado em: 18/04/2019