Deen Dayal Upadhyay Gorakhpur University

About: Deen Dayal Upadhyay Gorakhpur University is a education organization based out in Gorakhpur, Uttar Pradesh, India. It is known for research contribution in the topics: Thermal decomposition & Lymnaea acuminata. The organization has 1032 authors who have published 1591 publications receiving 21734 citations. The organization is also known as: Gorakhpur University.

Biological Effects of Myristica fragrans

Abstract: Myristica fragrans is an evergreen tree that produces two spices, nutmeg and mace. Its medicinal uses in the aurvedic system of treatment are based on traditional experience inherited from one generation to other. Scientists from various disciplines are now directing their research towards investigating the effects of M. fragrans on human health. The chemical constituents of M. fragrans have been investigated for hypolipidaemic and hypocholesterolemic effects, antimicrobial, antidepressant, aphrodisiac, memory enhancing, antioxidant and hepatoprotective properties. Recent studies have revealed strong insecticidal and molluscicidal activities of M. fragrans. Despite some laboratory studies on the insecticidal / molluscicidal activity of M. fragrans, more field studies are recommended for effective control of pests. It is clearly evident from the literature review that M. fragrans deserves more attention by scientific community and public health specialists to explore its full range of benefits in the welfare of the society

Studies on essential oils. Part 35: chemical and biocidal investigations on Tagetes erecta leaf volatile oil

Abstract: Chemical investigations on the leaf essential oil of Tagetes erecta, performed by HPLC, GC and GC–MS techniques, showed the presence of 26 components, accounting for 89% of the total oil. The major constituents were (Z)-β-ocimene (42.2%), dihydrotagetone (14.3%), (Z)-tagetone (8.3%), limonene (7.3%), (E)-ocimenone (6.1%) and (Z)-ocimenone (5.3%). The biocidal investigations showed that the oil possessed a significant but limited and dose-related antifungal and insecticidal activity. The oil showed 100% mortality of white termite (Odontotermes obesus Rhamb.) at a dose of 6 µl/Petri-plate after 24 h of exposure, while at lower doses and shorter exposures it showed diminished mortality rates. The oil only partially affected the mycelial growth of any of the tested fungi. Thus, the leaf oil of this plant, which is rich in (Z)-β-ocimene, has a statistically significant antifungal and insecticidal activity. Copyright © 2002 John Wiley & Sons, Ltd.

Quasi-simultaneous two-band optical variability of the blazars 1ES 1959+650 and 1ES 2344+514

Abstract: We report the results of quasi-simultaneous two-filter optical monitoring of two high-energy peaked blazars, 1ES 1959+650 and 1ES 2344+514, to search for microvariability and short-term variability (STV). We carried out optical photometric monitoring of these sources in an alternating sequence of B and R passbands, and have 24 and 19 nights of new data for these two sources, respectively. No genuine microvariability (intranight variability) was detected in either of these sources. This non-detection of intranight variations is in agreement with the conclusions of previous studies that high-energy peaked BL Lacs are intrinsically less variable than low-energy peaked BL Lacs in the optical bands. We also report the results of STV studies for these two sources between 2009 July and 2010 August. Genuine STV is found for the source 1ES 1959+650 but not for 1ES 2344+514. We briefly discuss possible reasons for the difference between the intranight variability behaviour of high- and low-energy peaked blazars.