Non-linear deformation of rocks

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Dispersal of Tritium in Southern Ocean Waters

Depth-distribution of tritium in Southern Ocean waters is reported. Decrease of tritium in surface waters from c 2 TU at 38° S. to 40°S. latitude, to 1.3TU and 1.1 TU at 45°S., 55°S., 60°S. and 64°S. latitudes, are very likely to be associated with the presence of convergence and divergence areas at subtropical and subantarctic latitudes in the Southern Ocean. A tritium-free layer has been found to exist at intermediate depths. Significant increase of tritium in waters at and below 4 km. strongly suggests a younger age, a minimum of the order of 25 years for the bottom waters circulating in the entire region to the south of South Australia

Prevalence and molecular characterization of ticks infesting dogs in Agartala, Tripura

Due to its ability to spread disease from one host to another, tick infestation is the most frequent issue pet owners’ deal with and should be taken seriously. The goal of the current study was to ascertain the prevalence of tick infestation in dogs in Agartala as well as its molecular identity and characterisation. A total of 1776 dogs of various breeds, ages, sexes, and categories were included in the study, which was conducted from March 2022 to February 2023 over the course of a calendar year. The total prevalence of ticks was reported to be 62.12%. According to study on breed, sex, age, and category, German spitz, male dogs, dogs under 1 year of age and stray dogs had the highest frequency of tick infestation. All throughout the year, tick infestations were seen, with the monsoon season seeing the highest frequency. Based on 16S rRNA gene amplification and sequence analysis, molecular identification revealed that all isolated ticks were members of the Rhipicephalus sanguineus species. Using a subset of the 16S rRNA gene, phylogenetic analysis revealed that R. sanguineus (OR244468.1) from Agartala (TrRS-PB) was part of the same clade as isolates from Kerala and Assam

Morphological characterization of sali rice accessions of North East India

Rice is a major cereal crop of Assam, North East India. The local rice accessions grown in this region possess unique traits of breeder’s choice i.e., tolerance to biotic and abiotic stresses. In the present investigation, 712 sali rice accessions of Assam were characterized using 20 qualitative and 13 quantitative traits. Among these, 19 qualitative traits showed distinct polymorphism except for the ligule colour. The maximum polymorphism was observed for apiculus colour followed by the colour of lemma palea and sterile lemma. The significant variation for the quantitative traits was recorded among the accessions. Lakhi Bilash and Borkamal were identified as the high yielding genotypes, which may be used further in breeding programmes. The cluster analysis using morphological traits based on the Euclidean distance matrix classified the accessions into the two distinct sub-groups. The high yielding accessions were grouped together in one cluster. A significant positive correlation was observed among the grain yield with the various panicle associated traits therefore, these may be used as selection criteria for development of high yielding rice varietiies

Morphological characterization of sali rice accessions of North East India

838-845Rice is a major cereal crop of Assam, North East India. The local rice accessions grown in this region possess unique traits of breeder’s choice i.e., tolerance to biotic and abiotic stresses. In the present investigation, 712 sali rice accessions of Assam were characterized using 20 qualitative and 13 quantitative traits. Among these, 19 qualitative traits showed distinct polymorphism except for the ligule colour. The maximum polymorphism was observed for apiculus colour followed by the colour of lemma palea and sterile lemma. The significant variation for the quantitative traits was recorded among the accessions. Lakhi Bilash and Borkamal were identified as the high yielding genotypes, which may be used further in breeding programmes. The cluster analysis using morphological traits based on the Euclidean distance matrix classified the accessions into the two distinct sub-groups. The high yielding accessions were grouped together in one cluster. A significant positive correlation was observed among the grain yield with the various panicle associated traits therefore, these may be used as selection criteria for development of high yielding rice varietiies

A STUDY ON SEROPREVELENCE AND RISK FACTORS OF BOVINE LEPTOSPIROSIS IN LOWER ASSAM, INDIA

The present study was conducted to ascertain the seroprevalence of Leptospira infection in cattle among certain districts of the lower Brahmaputra valley in the state of Assam from March 2017 to February 2018. Two serological tests viz. IgG ELISA and Microscopic Agglutination Test (MAT) were used to detect the leptospiral antibodies. The anti-leptospiral antibodies were detected by IgG ELISA and compared with MAT using antigens from 12 pathogenic serovars. Out of 380 sera samples, 68 (17.89 %, 95% CI: 6.89-27) and 44 (11.58%) were positive by IgG ELISA and MAT respectively. The circulating Leptospira serovars identified were Autumnalis (6.05%), Ballum (2.63%), Batavia (1.31%), Ichterohaemorrhagie (0.7%), Javanica (0.5%) and Sejroe (0.2%). The sensitivity and specificity of IgG ELISA in comparison to MAT were calculated and found to be 100% and 92.85% respectively with a concordance of 93.68%. An epidemiological investigation was carried out to find the association of various risk factors with Leptospira infection under this study in cattle using a pre-tested questionnaire. The present study will serve as baseline data for the prevention and control of Leptospira infection in cattle

Enhanced antibacterial activity of streptomycin against some human pathogens using green synthesized silver nanoparticles

AbstractThe development of eco-friendly technologies in nanoparticle synthesis is of utmost importance in order to expand their biological horizons. In the present study, bioreduction of AgNO3 into AgNPs using various leaf extracts of Ficus virens is explained. The resulting AgNPs were characterized by UV–vis spectroscopy, dynamic light scattering (DLS), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and transmission electron microscopy (TEM). Synthesis of AgNPs was confirmed by color change from transparent to brown with maximum absorption at 420 nm due to surface plasmon resonance of AgNPs. X-ray diffraction studies showed that the biosynthesized AgNPs were crystalline in nature, and TEM analysis showed spherical shape of the nanoparticles with size ranging from 4.98 to 29 nm. FTIR study indicates that mainly –C = O, -OH and N-H groups in leaf extracts are involved in the reduction of Ag+ ions to Ag atoms, and proteins are responsible for stabilizing the silver nanoparticles. The synthesized AgNPs showed significant antibacterial activity against Gram positive and gram negative human bacterial pathogens. The results showed that AgNPs also synergistically enhance (2.02–57.98%) the antibacterial activity of streptomycin, a common antibiotic. With this approach, AgNPs can be used as a new generation of antimicrobial agents for successful development of drug delivery