Posted by admin on Feb 1, 2012 in |
The unusual physio and chemical properties of gold nanoparticles are found to have more advantage in the field of medicine, diagnostics and biosensors. In the present document, it is reported that Justicia gendarussa leaf extract mediated synthesis of gold nanoparticles by the reduction of gold ions. Three different phytochemical fractions were prepared from methanolic leaf extract by liquid-liquid extraction method using immiscible solvents. The total polyphenols, flavonoids and electron donating capacity (DPPH assay) of each phytochemical fraction was analyzed. The 1mg/ml of diethyl ether phytochemical fraction produced more gold nanoparticles within 15 minutes when exposed to 10ml of 0.5mM chloroauric acid compared to chloroform and ethyl acetate phytochemical fractions. The structural characteristics of diethyl ether phytochemical fraction synthesized gold nanoparticles were characterized by UV-visible spectroscopy, Dynamic light scattering, Transmission electron microscopy, X-ray diffraction and Fourier transform-infrared spectroscopies. These biosynthesized gold nanoparticles showed surface plasmon resonance band at 536nm in UV-visible spectrum. The size of the gold nanoparticles ranged from 20 to 42nm and 62 to 88nm with spherical, triangle,...
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Posted by admin on Feb 1, 2012 in |
A series of flavones (5-15) weresynthesized from resorcinolvia Baker-Venkataraman transformation, characterized and evaluated for their cytotoxicity against human cervical cell line (HeLa) by MTT assay method. The result of preliminary MTT cytotoxicity studies shown that the compounds 5, 9 and 10 were found to be most potent against HeLa cells; IC50 values were of 0.22, 0.88 and 1.26 µM...
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Posted by admin on Feb 1, 2012 in |
Plant products served as an alternative to synthetic products because of local accessibility, eco friendly nature and lower prices. Natural gums and mucilages are widely explored as pharmaceutical excipients. The present study was undertaken to separate mucilage from unripe fruits of Aegle marmelos (L) Corr. and explore its use as binder in tablets. The binding properties at different concentrations of mucilage were evaluated using Paracetamol as model drug. Mucilage at 3%w/w was found to be comparable with 10%w/w of starch paste. The drug release studies indicated that Aegle marmelos mucilage could be considered as a potential binding...
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Posted by admin on Feb 1, 2012 in |
Plants have provided mankind with herbal remedies for many diseases for many centuries and eventody. In India, herbal medicines have been the basis of treatment and cure for various diseases in traditional methods practiced such as Ayurveda, Unani and Sidha. Syzygium cumini Linn. (Myrtaceae) commonly known as jambul tree (English), having promising theraputic values with its various phytoconstituents. Preliminary Phytochemical investigation was carried out on the methanolic extract of Syzygium cumini Linn. Bark. It indices presence of Carbohydrates, Amino acids, Tannins, Saponins, phytosterols, Terpenoids, phenols and flavonoids. We are also quantitatively estimated total phenolic content, tannins and favaniods by using spectrophotometer. The total phenolic content was 580.23 ± 3.03 mg/g, tannin content was 534 ± 4.03 mg/ g while the flavonoid content was 315.42 ± 4.52 mg/g. The methanolic and aqueous extracts of bark were screened for antioxidant activity using Nitric oxide scavenging activity method, which showed significant persentage of inhibition in dose dependent manner. As antioxidant therapy is found to be useful in complicated disease status related with...
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Posted by admin on Feb 1, 2012 in |
The present research work has been carried out for an optimized formulation of co-processed directly compressible vehicles in the preparation of the Acetaminophen mouth fast dissolving tablets (MFDTs). Acetaminophen was chosen due to its poor compression properties. Di-calcium Phosphate(DCP) was incorporated in the neutralized aqueous starch dispersion to prepare co-processed excipient. Co-processed direct compressible DCP and Starch used as co-processed excipient were taken in good formulation ratio such as (25:75) and Cross Povidone used as superdisintegrant. The effects of other superdisintegrants were studied in the best formulation F5. Formulation F5 was found to be optimum compressibility characteristics hardness 3.62±0.40 to 4.68±0.31 kg/cm2 with fast disintegration (10 sec) compare to other formulations...
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