NOPR Collection:

Micro fabric and mineralogical studies on the stabilization of expansive soil using cement industry wastes

2016-06-01T00:00:00Z

Title: Micro fabric and mineralogical studies on the stabilization of expansive soil using cement industry wastes Authors: Sathyapriya, S.; Arumairaj, Dr. P.D. Abstract: This study aims to describe the micro fabric and mineralogical alterations of an expansive clay soil in Coimbatore (Tamilnadu, India) caused by the addition of cement industry wastes namely bottom ash and Ecosand (commercial name). In order to explicate the alterations, geotechnical properties and mineralogical composition of the untreated soil is determined. Soil samples are then mixed with different percentages of bottom ash, ecosand and their combination to decide the optimum dosage of these additives. X-ray diffraction pattern (XRD) and Scanning Electron Microscopic images (SEM) of the untreated and treated soil samples are obtained and studied. XRD pattern shows the formation of stable compounds. SEM micrographs reveal the formation of the organized and flocculated structure due to the addition of cement industry waste.Reduction in average interplanar spacing of the treated soil shows the stabilizing effect of the cement industry wastes resulting in the reduction of swell pressure and swell potential values. Addition of these stabilizers induces desired geotechnical properties to the soil. This experiment was undertaken for a curing period of 28 days. Page(s): 807-815

Seasonal variation in the proximate composition of sardine (Sardinella gibbosa) from Thoothukudi coast

2016-06-01T00:00:00Z

Title: Seasonal variation in the proximate composition of sardine (Sardinella gibbosa) from Thoothukudi coast Authors: Bagthasingh, Chrisolite; Aran, Shanmugam Seerappalli; Vetri, Vijayarahavan; Innocen, A; Kannaiyan, Sathish Kumar Abstract: Seasonal variation in the proximate composition (moisture, protein, fat, carbohydrate and ash) of sardine (Sardinella gibbosa) was analysed for one year (June 2013 to May 2014). In addition, the fatty acid profile and protein fractions (sarcoplasmic, myofibrillar and stoma proteins) of the sample collected in the month of May 2014 were also analysed. Protein, fat, carbohydrate and ash content were varied significantly (P<0.05) from 15.43 to 22.76%, 1.25 to 6.77%, 0.47 to 0.89% and 1.78 to 3.21% respectively. Lipid content of sardine was high during November 2013 to January 2014 (6.21 – 6.77%) and least in the month of May 2014 (1.25%). Sardine sample collected in May 2014 was rich in PUFA especially EPA (C20:5) and DHA (C22:6). Analysis of protein fraction in sardine collected in the month of May 2014 showed that the sardine muscle contains 23.81% sarcoplasmic, 71.97% myofibrillar and 3.20% stroma proteins. The results showed no marked the variation in the protein, carbohydrate and ash contents, whereas, greater seasonal variation in the lipid content of the sample. Lipid content increased from the month of June 2013, reaching a maximum of 6.77% in November 2013, was almost stable in December 2013 (6.33%) and January 2014 (6.21%), after where it decreased as low as 1.25% in May 2014. Page(s): 800-806

Antibiotic efficacy and biochemical composition of ascidian, Phallusia nigra (Savigny, 1816) from the Palk bay, Southeast coast of India

2016-06-01T00:00:00Z

Title: Antibiotic efficacy and biochemical composition of ascidian, Phallusia nigra (Savigny, 1816) from the Palk bay, Southeast coast of India Authors: Iyappan, Kathirvel; Ananthan, Gnanakkan Abstract: An investigation was held out to examine the biochemical constituents present in the simple ascidian Phallusia nigra (P. nigra), such as protein, carbohydrate, lipids, moisture, acidity and ash content. Extractions of P. nigra (visceral) tissue sample in several solvents were assayed for antibacterial activity against foodborne pathogens. Protein content was found to be higher during the summer season in P. nigra, while the minimum quantity of lipid was recorded during monsoon season. Benzene and acetonitrile crude extracts inhibited the growth of foodborne pathogens. Chloroform extract didn't inhibit any strains. Page(s): 795-799

Effect of seaweed saps derived from two marine algae Kappaphycus and Gracilaria on growth and yield improvement of blackgram

2016-06-01T00:00:00Z

Title: Effect of seaweed saps derived from two marine algae Kappaphycus and Gracilaria on growth and yield improvement of blackgram Authors: Pramanick, Biswajit; Brahmachari, Koushik; Ghosh, Arup; Zodape, S. T. Abstract: A field experiment was conducted during the pre-kharif season at Muratipur village, Nadia, West Bengal (Latitude: 22°57′ N, Longitude: 88°20′ E) in two consecutive year of 2012 and 2013 to study the effects of seaweed saps on growth and yield improvement of blackgram in new alluvial soil of West Bengal. Foliar spray was applied twice at different concentrations (0, 2.5, 5.0, 7.5, 10.0 and 15.0% v/v) of seaweed extracts (namely Kappaphycus and Gracilaria) with recommended dose of fertilizer (RDF). Foliar applications of seaweed extract significantly enhanced the growth and yield parameters. Highest grain yield was recorded with the combined applications of 15% Kappaphykus sap and RDF, followed by the combined application of 15% Gracilaria sap and RDF extract resulting in an increase by 51.06% and 47.15% seed yield respectively compared to the control. Maximum stover yield was also achieved with the application of 15% Kappaphykus sap. Page(s): 789-794