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匹配条件: “Kuladip Sarma” ,找到相关结果约1142条。
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Impact of road widening on wildlife in Namdapha National Park, Arunachal Pradesh, India: a conservation issue
Murali Krishna C,Awadhesh Kumar,Parimal Chandra Ray,Kuladip Sarma
Asian Journal of Conservation Biology , 2013,
Abstract:
Clinical Evaluation of Non-surgical Sterilization of Male Cats with Single Intra-testicular Injection of Calcium Chloride
Kuladip Jana, Prabhat K Samanta
BMC Veterinary Research , 2011, DOI: 10.1186/1746-6148-7-39
Abstract: At the 60th day post-injection, cat testes were collected and showed complete testicular necrosis and replacement by fibrous tissue; very low sperm counts; and reduction of serum testosterone by at least 70% in 20% dose. Androgenic enzyme activities and their expressions were also reduced in all the treated groups along with intra-testicular testosterone concentration was also low. Increased testicular lipid peroxidation, with reduced antioxidants and mitochondrial membrane potential, were evident following calcium chloride treatments. However, there were no apparent changes in serum concentrations of cortisol, fasting blood sugar level, blood urea nitrogen, packed cell volume, or total serum protein following calcium chloride injection, suggesting that this method of sterilization is not associated with any general stress response.Calcium chloride solution demonstrates potential for androgenesis-eliminating nonsurgical sterilization of male cats in addition to its proven efficacy in dogs and other mammals.Sterilization has long been recognized as the most effective means of controlling pet populations. Yet with the huge numbers of owned and un-owned cats in the developing countries like India, the sterilization programs currently available are not enough. The mainstay of population control for male cats has been accomplished through surgical sterilization, namely orchidectomy (castration) [1]. However, for many reasons, surgical sterilization may not be effective as the sole method for population control. It requires anesthesia, medical equipment, a sterile surgical suite, a trained veterinarian, recovery time, incision site observation, and more [2]. It carries the risks that inherent in any surgical procedure. Furthermore, many people are unwilling to subject their pets to what they perceive to be a painful and invasive procedure. The cost of surgery is prohibitive for many owners, particularly in developing countries. In addition, when considering cat population
Effects of chronic exposure to sodium arsenite on hypothalamo-pituitary-testicular activities in adult rats: possible an estrogenic mode of action
Kuladip Jana, Subarna Jana, Prabhat Samanta
Reproductive Biology and Endocrinology , 2006, DOI: 10.1186/1477-7827-4-9
Abstract: The effect of chronic oral exposure to sodium arsenite (5 mg/kg body weight/day) via drinking water without or with hCG (5 I.U./kg body weight/day) and oestradiol (25 micrograms oestradiol 3-benzoate suspended in 0.25 ml olive oil/rat/day) co-treatments for 6 days a week for 4 weeks (about the duration of two spermatogenic cycle) was evaluated in adult male rats. Changes in paired testicular weights, quantitative study of different varieties of germ cells at stage VII of spermatogenic cycle, epididymal sperm count, circulatory concentrations of hormones (LH, FSH, testosterone and corticosterone), testicular activities of delta 5, 3beta-hydroxysteroid dehydrogenase (delta 5, 3beta-HSD), 17 beta-hydroxysteroid dehydrogenase (17 beta-HSD), sorbitol dehydrogenase (SDH), acid phosphatase (ACP), alkaline phosphatase (ALP), and lactate dehydrogenase (LDH), as well as the levels of biogenic amines (dopamine, noradrenaline and 5-hydroxytryptamine (5-HT)) in the hypothalamus and pituitary were monitored in this study. Hormones were assayed by radioimmuno- assay or enzyme- linked immunosorbent assay and the enzymes were estimated after spectrophotometry as well as the biogenic amines by HPLC electrochemistry.Sodium arsenite treatment resulted in: decreased paired testicular weights; epididymal sperm count; plasma LH, FSH, testosterone and testicular testosterone concentrations; and increased plasma concentration of corticosterone. Testicular enzymes such as delta 5, 3 beta-HSD, 17 beta-HSD, and sorbitol dehydrogenase (SDH) were significantly decreased, but those of acid phosphatase (ACP), alkaline phosphatase (ALP), and lactate dehydrogenase (LDH) were significantly increased. A decrease in dopamine or an increase in noradrenaline and 5-HT in hypothalamus and pituitary were also noted after arsenic exposure. Histological evaluation revealed extensive degeneration of different varieties of germ cells at stage VII of spermatogenic cycle in arsenic exposed rats. Administration of
Elucidation of the Involvement of p14, a Sperm Protein during Maturation, Capacitation and Acrosome Reaction of Caprine Spermatozoa
Pinki Nandi, Swatilekha Ghosh, Kuladip Jana, Parimal C. Sen
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0030552
Abstract: Mammalian sperm capacitation is an essential prerequisite to fertilization. Although progress is being made in understanding the physiology and biochemistry of capacitation, little has been yet explored about the potential role(s) of individual sperm cell protein during this process. Therefore elucidation of the role of different sperm proteins in the process of capacitation might be of great importance to understand the process of fertilization. The present work describes the partial characterization of a 14-kDa protein (p14) detected in goat spermatozoa using an antibody directed against the purified protein. Confocal microscopic analysis reveals that the protein is present in both the intracellular and extracellular regions of the acrosomal and postacrosomal portion of caudal sperm head. Though subcellular localization shows that p14 is mainly cytosolic, however it is also seen to be present in peripheral plasma membrane and soluble part of acrosome. Immuno-localization experiment shows change in the distribution pattern of this protein upon induction of capacitation in sperm cells. Increased immunolabeling in the anterior head region of live spermatozoa is also observed when these cells are incubated under capacitating conditions, whereas most sperm cells challenged with the calcium ionophore A23187 to acrosome react, lose their labeling almost completely. Intracellular distribution of p14 also changes significantly during acrosome reaction. Interestingly, on the other hand the antibody raised against this 14-kDa sperm protein enhances the forward motility of caprine sperm cells. Rose-Bengal staining method shows that this anti-p14 antibody also decreases the number of acrosome reacted cells if incubated with capacitated sperm cells before induction of acrosome reaction. All these results taken together clearly indicate that p14 is intimately involved and plays a critical role in the acrosomal membrane fusion event.
Enhanced Biodegradation of Oil Products by Some Microbial Isolate Supplemented with Heavy Metals
Aniruddha Sarma,Hemen Sarma
International Journal of Botany , 2010,
Abstract: Three native strains, identified as Staphylococcus sp., Acinetobactor lwoffii and Enterobacter agglomerans were isolated from crude oil contaminated field and the aim of this research was to select potential soil microbial strain that could be effective in the bioremediation of crude oil compounds. Crude oil degradation performed by the isolates incubated in the shake flask culture and analysis of the results address that Acinetobactor lwoffii, accelerated cleanup most effectively, degrading oil sludge by a total of 93.78% in compare to Staphylococcus sp. (17.39%) and Enterobacter agglomerans (16.49%). Furthermore enhanced biodegradation potential of the isolates were studied by adding Mn and Cu and results indicated that supplemented metal increased degradation of crude oil products. In the present study, three bacterial strains AS1, AS2 and AS3 were termed and isolated through long cultivation with crude oil as the single carbon source. The three strains were identified based on the morphology of their colonies with physiological and biochemical characteristics. In addition, the characterizations of soil where the presence of these strains were carried out. The total CFU count ranged from 2x106 to 6x106 and total viable bacteria at 32°C ranged from 2.2x103 to 5.6x103 in various soil sample collected in random from contaminated site. The strains had broad degradation capacities and the present remediation monitoring confirmed the effectiveness of Acinetobactor lwoffii has one of the potential native microbes for remediation of crude oil soil.
International Rotifer Symposia: prospects and retrospects from Rotifera XI
SSS Sarma
Aquatic Biosystems , 2006, DOI: 10.1186/1746-1448-2-6
Abstract: Rotifers are small (<2 mm) and beautiful invertebrates, harmless to mankind. Their use as model organisms in teaching courses of biology, as a scandalous group in evolutionary ecology, as larval diet in aquaculture and as sensitive indicators of water quality has been widely recognized. Moreover, due to their high metabolic rates, they regenerate nutrients trapped in phytoplankton and detritus on which they feed [1]. There are about 2150 rotifer species globally. The fact that new species are currently discovered from different parts of the world suggests that the taxonomic studies on rotifers are far from complete in spite of its 300 year old history [2,3].The tradition of triennial rotifer symposia was first initiated by the late Ruttner- Kolisko of Austria. This has had a stimulatory influence on rotifer research. So far 10 countries have hosted these symposia (Austria (twice), Belgium, Italy, Poland, Spain, Sweden, United Kingdom, USA and Thailand and Mexico). Unlike many other conferences, rotifer symposia are distinguished by keeping a permanent record of presentations through formal publication in the form of proceedings in a prestigious scientific journal. Though the proceedings of the first rotifer meeting appeared in Archiv für Hydrobiologie, the subsequent proceedings have taken an honourable place in Hydrobiologia. The proceedings of the XI Rotifer meeting are also expected to appear in the same journal (Table 1).The XI international rotifer symposium was held during 11–18 March, 2006 at the National Autonomous University of Mexico Campus Iztacala located at the North Mexico City (Mexico). The abstracts of the meeting are available on the official website [4]. A total of 125 participants from 20 nations participated during this meeting (Figure 1). At the symposium five major areas were considered: 1. morphology, taxonomy, zoogeography and field ecology, 2. feeding, trophic interactions, behaviour, autecology and population ecology, 3. molecular biology,
Morphological and Craniometrical Studies on the Skull of Kagani Goat (Capra hircus) of Jammu Region
Sarma,Kamal;
International Journal of Morphology , 2006, DOI: 10.4067/S0717-95022006000400025
Abstract: forty six heads of adult kagani goats were used in the present study. the frontal bone did not constitute the caudal extent of the frontal surface. both the nasal bones were divided longitudinally into two halves by deep notches up to the middle part starting from its rostral end. the facial tuberosity was placed at the junction of the 4th and 5th cheek teeth. the basisphenpoid bone had a sharp median ridge. the frontal bone contributed to the maximum in this animal. bilateral variation was recorded among the orbits of right and left sides. skull base length varied positively with the skull width and skull length
Technological Support and Problem-Based Learning as a Means of Formation of Student's Creative Experience
Sarma Cakula
Discourse and Communication for Sustainable Education , 2011, DOI: 10.2478/v10230-011-0003-5
Abstract: Problem-based learning and technology support for students in higher education investigates the new perspectives of education in connection with the change of life paradigm. The present research seeks to find out what study methods and technology support can be used for developing students' creative experience in the context of education for sustainable development. The research provides an analysis of the main concepts revealing the essence of the study process. The opportunities of using information technology in the study process to meet the needs of students' research activities in the form of cooperative learning are described. The research is based on Dewey and Brunner's theory as a basis of the educational process in the modern world of technologies. Developing creative experiences is a basic concept for sustainable development of education in today's information society.
Doing Good is Good Business
Parthajeet Sarma
Space and Culture, India , 2013,
Abstract:
Morphological and Craniometrical Studies on the Skull of Kagani Goat (Capra hircus) of Jammu Region Estudios Morfológico y Craniométrico de la Cabra Kagani (Capra hircus) de la Región de Jammu
Kamal Sarma
International Journal of Morphology , 2006,
Abstract: Forty six heads of adult Kagani goats were used in the present study. The frontal bone did not constitute the caudal extent of the frontal surface. Both the nasal bones were divided longitudinally into two halves by deep notches up to the middle part starting from its rostral end. The facial tuberosity was placed at the junction of the 4th and 5th cheek teeth. The basisphenpoid bone had a sharp median ridge. The frontal bone contributed to the maximum in this animal. Bilateral variation was recorded among the orbits of right and left sides. Skull base length varied positively with the skull width and skull length En el presente estudio se utilizaron 46 cabezas de cabra Kagani. El hueso frontal no constituía la parte caudal de la superficie frontal. Ambos huesos nasales estaban divididos en dos porciones por profundas incisuras en la parte media, comenzando desde su terminación rostral. La tuberosidad facial fue localizada en la mejilla, a nivel de la unión de los dientes 4 y 5. El hueso basiesfenoides tenía una afilada cresta mediana. El hueso frontal contribuyó ampliamente en este animal. Se registraron variaciones entre las órbitas de los lados derecho e izquierdo. La longitud de la base craneal varió positivamente respecto al ancho y largo del cráneo
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