NOPR Collection:

Estimation of Sodium Content of Some Commercial Antacid Tablets by Flame Photometry

Sun, 01 Oct 2000 00:00:00 GMT

Title: Estimation of Sodium Content of Some Commercial Antacid Tablets by Flame Photometry Authors: Manna, A; Samanta, A; Pal, D K; Si, A; Bandopadhyay, S; Suresh, P Abstract: Antacids are marketed widely as over-the-counter (OTC) drugs, which are generally used for neutralising the acid, for relief of heart burn, dyspepsia and large variety of non-specific gastrointestinal symptoms. A study on composition of antacid formulations reveals that a large number of antacid formulations contain aluminium hydroxide and/or magnesium hydroxide which, in turn , contains some units of sodium ions in it. The presence of sodium ions in antacid preparations is particularly contraindicated in patients with known cardiac and hypertensive problems. In the present study, an attempt is therefore made to study the content of sodium ions in marketed antacid tablets. Estimation of sodium content was made by Flame photometry. The study reveals that the formulation contains significant concentration of sodium ions, which suggests that care must be taken during the manufacturing of these hydroxides and certain specifications are needed by the monographs regarding the sodium content of antacid preparations. Page(s): 856-858

A Case Study of Chandrapura Thermal Power Station – Leaching Study of Trace Elements from Fly Ashes

Sun, 01 Oct 2000 00:00:00 GMT

Title: A Case Study of Chandrapura Thermal Power Station – Leaching Study of Trace Elements from Fly Ashes Authors: Kumar, Sanjay Abstract: Electricity generation has been increasing at a rapid pace due to Industrialization and changing life styles. Coal is the major source of energy, since India has vast reserves of thermal power grade coal. Nearly every naturally occurring element is likely to be present in coal and these get entrained in the resultant bottom ash. Indian coals contain high ash coupled with low calorific value, and consequently resulting huge amount of fly ash. This ash accumulates in onsite piles and ponds, thereby resulting in serious environment problems, particularly trace elements contamination of ground and surface waters. This study envisages the environmental assessment of fly ash from Chandrapura Thermal Power Station. Leaching study of fly ash is made by the analysis of leaches from open percolation leaching column experiments over a period of 274 d. Trace elements were observed within the regulatory limits. Many of the trace elements evaluated viz. Cr, Ni, Co, Se, Al, As, B, Ba, Sb and Hg were observed at below detection limits. Na, K, Ca, Mg, Fe, Pb, Cd and other dissolved ions leached at significant concentration levels, while Cu and Zn leached normally at lower concentration levels. The study suggests low-cost high volume utilization of fly ash as fill material for reclaiming surrounding abandoned mined out areas which are environmentally acceptable. Page(s): 852-855

Cholesterol Binding in Schistocerca gregaria and Insect Cell Lines

Sun, 01 Oct 2000 00:00:00 GMT

Title: Cholesterol Binding in Schistocerca gregaria and Insect Cell Lines Authors: Upadhyay, Ravi Kant; Dhar, Ravi; Agarwal, H C Abstract: Cholesterol binding affinities in different tissue homogenates of Schistocerca gregaria (Forskal) and insect cell line are reported. In the first set of experiment , binding could be observed in haemolymph, ovary, testis, fat body, midgut, mucin and serum protiens of both sexes of Schistocerca gregoria. The binding assays were conducted in the presence of labelled and unlabelled cholesterol. The total number of binding sites (Rt ) are found to be 4.77×10^-8 mole/L while extracted proteins from 1st and IInd peaks show 7.10×10^-9 and 12.8× 10^-9 mole/L. The binding sites in delipidated mucin have shown some higher binding (2.97 × 10^-8 mole/L) than the non-lipidated mucin (1.38 ×10^-8 mole/L). Insect cell lines Sf-9 and BmN cells have kd value of 1.494×10^-8 and 4.08×10^-8 mole/L in crude homogenate. Page(s): 845-851

Deinking of Wastepapers with White-rot Fungus, Phanerochaet chrysosporium NRRL 6361

Sun, 01 Oct 2000 00:00:00 GMT

Title: Deinking of Wastepapers with White-rot Fungus, Phanerochaet chrysosporium NRRL 6361 Authors: Mansour, Olfat Y; Helmy, Samia M; El-Meligi, Magda Abstract: The study examines the ability of white-rot fungus Phanerochaet chrysosporium NRRL 6361 to deink the wastepapers under investigation; namely, newsprint, writing, and printing papers. The wastepapers are inoculated with culture of P. chrysosporium NRRL 6361 under sterilized conditions at different pHs (5-11.4) in the presence and absence of growth media. The optimization of the process parameters shows that the incubation for one week at 32 ± 2°C results in maximum deinking of recycled newsprint at pH 11.4 with brigtness 39 per cent and maximum brightness of recycled printing papers 75 per cent at pH 7.2, while for writing paper the maximum brightness obtained is 80 per cent at pH 7.5. The α-cellulose content of recycled wastepapers is found to increases, while lignin decreases during deinking by P. chrysosporium NRRL 6361. The results indicate that the fungus do not have any affect on the cellulose. Scanning electron microscope (SEM) is used to follow the fungus growth hyphae through the wastepapers after one week of incubation. The mechanical properties of the handsheets made from recycled wastepapers slightly decrease. Therefore, starch-silicate complex is used to overcome the decrease of the mechanical properties. Page(s): 838-844