Dynamics of an Anisotropic Universe in f(R,T)f(R,T) Theory

Dynamics of an anisotropic universe is studied in $f(R,T)$ gravity using a rescaled functional $f(R,T)$. Three models have been constructed assuming a power law expansion of the universe. Physical features of the models are discussed. The model parameters are constrained from a dimensional analysis. It is found from the work that, the $BVI_h$ model in the modified gravity can favour quintessence and phantom phase.Comment: 16 pages, 4 figure

Varietal Evaluation for Yield and Yield Parameters of Ber under Semi-Arid Region of West Bengal

An experiment was conducted in a private orchard 5 km away from Regional Research Station, Bidhan Krishi Viswavidyalaya, West Bengal, during 2004-2005 to study fruit drop, retention, maturity and fruit yield of ten cultivars of ber. Among ten cultivars studied, cv. Kaithali took a minimum of 6 days to attain flower bud development while, in cv. Jogia, it was 13 days. Period from fruit-set to fruit maturity in different cultivars varied from 130 to 160 days. The time of harvest in different cultivars of ber was from third week of December to third week of March. Maximum fruit-drop occurred at 15 and 30 days after fruit-set and, subsequently, decreased up to maturity. The total fruit-drop percentage varied from 66.5 (cv. Gola) to 92.5 (cv. Illaichi). Similarly, final fruit-retention in different cultivars varied from 7.5 in cv. Illaichi to 33.5% in cv. Gola. Cultivar Jogia produced highest fruit yield (111.4 kg plant1), followed by cv. Gola (90.0 kg plant-1) and cv. Seb (81.5 kg plant-1). Lowest average yield was recorded in cv. Mundia (35.3 kg plant-1)

Performance of Mosambi Sweet Orange on Different Rootstocks Grown in Laterite Soil in West Bengal

A rootstock trial was laid out on sweet orange cultivar 'Mosambi' budded on five rootstocks viz., Jambhiri, Karna Khatta, Kichili, Rangpur lime and Sour orange. Tree growth was maximum on Jambhiri and minimum on Rangpur lime. Fruit yield (both in number and weight) was highest on Karna Khatta, rootstock followed by Rangpur lime while, fruit size and juice content were maximum on Rangpur lime. Total soluble solids and ascorbic acid content were highest in Karna Khatta, while T.S.S. to acid ratio was maximum in Rangpur lime. Foliar nitrogen content was highest in Karna Khatta followed by Rangpur lime. On the basis of four seasons data in respect of yield and fruit quality, Karna Khatta and Rangpur lime were the observed as suitable rootstocks for 'Mosambi' sweet orange grown on laterite soil of West Bengal

Cosmological models with Big rip and Pseudo rip Scenarios in extended theory of gravity

In this paper, we have presented the big rip and pseudo rip cosmological models in an extended theory of gravity. The matter field is considered to be that of perfect fluid. The geometrical parameters are adjusted in such a manner that it matches the prescriptions given by cosmological observations, to be specific to the range of Hubble tension $(H_{0})$. The models favor phantom behavior. The violation of strong energy conditions are shown in both the models, as it has become essential in an extended gravity. The representative values of the coupling parameter are significant on the evolution of the universe.Comment: 14 pages, 18 figure

Effect of portulaca olearecea and its interaction with vecuronium on neuromuscular junction in experimental animals

Background: The extracts from the plant Portulaca oleracrea have been mentioned to have muscle relaxant properties in traditional medicine literatures and used as a food supplement. The site of therapeutic action is directly on muscle fibres rather than neuromuscular transmission.The muscle relaxant property is found to be similar with dantrolene in frog rectus abdominis .So objectives of our study to analyze the effect of Portulaca oleracea and its interaction with vecuronium on the neuromuscular junction in experimental animal.Methods: The study was conducted in two parts i.e. study 1 and study 2. In study 1:2 ml and 4 ml Portulaca oleracea fresh aqueous leave juice was given orally to 12 number rabbits and vecuronium 5 microgram/ml was given intravenously to all 6 rats through marginal ear vein with the help of scalp vein attached with 10 ml syringe. The head drop time is recorded and reversal of neuromuscular blockade was done with neostigmine (0.25 mg/kg) along with atropine (2 mg). Study 2: 2 ml and 4 ml of Portulaca oleracea fresh aqueous leave juice was tested on frog's isolated rectus abdominis muscle in Dales’s isolated organ bath and its interaction with vecuronium (1 mmole-32 mmole) was recorded.Results: Portulaca oleracea has muscle relaxant properties, which was recorded which was indicated by decreasing the time of head drop and complete block in study 1. In study 2, it also decreased the Ach induced contraction in presence of vecuronium.Conclusions: The results indicate the muscle relaxant properties fresh juice of Portulac Oleracea probably due to high content of potassium