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Journal Cover Journal of Food and Pharmaceutical Sciences
  [1 followers]  Follow
  This is an Open Access Journal Open Access journal
   ISSN (Print) 2089-7200 - ISSN (Online) 2339-0948
   Published by Gadjah Mada University Homepage  [4 journals]
  • Investigation of Effect of Extensively Used Polymers on Thermoreversible
           Properties of Pluronic ® Tri-Block Polymer

    • Authors: Nilesh Ramesh Rarokar, Suprit D Saoji1, Pramod Khedekar
      Pages: 24 - 34
      Abstract: This investigation presents a study on the effect of various polymers on gelling properties of tri-block (Pluronic®) copolymers and increasing the stability parameter of in situ gelling system by altering their composition. The tri-block copolymers finds their importance in fabrication of in situ gelling system for the delivery of various kinds of drugs, which can be administered by topical, ophthalmic or parenteral routes. Pluronic®, is a category of non-toxic, water soluble, biodegradable poly (ethylene oxide)/poly (propylene oxide)/poly ethylene oxide), tri-block copolymers which have application in formulation of various in situ gelling systems. This formulation undergo thermo-reversible gelation, where it exists as a free flowing liquid at low temperature and gels in the range of body temperature to form stable depot in aqueous environment. Gelling system was prepared according to the 'Cold Method' using different concentration of polymers (15% to 20% w/v) and subjected to the determination of gelation temperature (GT), viscosity study and effect of various polymers on the strength of gelation. Overall study on the gelation of system at particular temperature is the important parameter for formulation of in situ drug delivery system. It was established that addition of 0.5% w/v of HPMC K4M into gelling system make it stable for forming gel in the range of body temperature whereas methyl cellulose, carbopol 934P, and HPMC E-5 restrict the gel formation. Key words: Tri-Block Copolymer; Gelation Temperature; Gelling System; Depot.
      PubDate: 2017-09-15
      Issue No: Vol. 5, No. 3 (2017)
  • Piptadenia Africana: Enhances Weight Gain, Oxidative Stress,
           Hyperlipidemia in Normal and Hypercholesterolemic Male Wistar Rat

    • Authors: Nwozo Sarah Onyenibe, Oyinloye Babatunji Emmanuel
      Pages: 35 - 39
      Abstract: Poyphenol rich stem bark of Piptadenia africana (PA) is used to treat gastric pain, fever, cough and we evaluated the effect of daily, continual intake of PA for eight weeks in hypercholesterolemic rats. Thirty six rats were divided into six equal groups, A (positive-control); B (cholesterol) (negative-control); C (100 mg/kg bwt PA); D (200 mg/kg bwt PA); E (cholesterol+100 mg/kg bwt PA) and F (cholesterol+200 mg/kg bwt PA). Corn oil served as vehicle for both cholesterol (40 mg/kg/0.3ml) and PA. PA caused increased weight-gain, no enlarged organs but decreased their protein concentrations relative to control. Serum triglyceride, total cholesterol and LDL-cholesterol were elevated in PA only and PA co-treated cholesterol rats relative to both control groups, culminating in high atherogenic index. Lipidperoxidation increased dose dependently while glutathione-peroxidase, glutathione-S-transferase, reduced glutathione, superoxide dismutase and catalase decreased in PA treated groups relative to controls. Histological examination revealed necrosis of hepatocytes in groups D and moderate coagulation of necrosis of tubules of renal medulla in C. Continuous usage of PA may not be totally safe as it enhances weight gain, unhealthy lipid profile, increase chances of cardiovascular disease, elicits oxidative stress and induces organ toxicity. Key words: atherogenic-index, lipidperoxidation, lipid profile, organ toxicity, Piptadenia africana.
      PubDate: 2017-10-12
      Issue No: Vol. 5, No. 3 (2017)
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
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Fax: +00 44 (0)131 4513327
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