Effects of repeated topical application of dichlorvos on blood enzymes and its toxicity in buffalo calves (Bubalus bubalis)     

R Raina  A K Srivastava  J K Malik 《The British veterinary journal》1990,146(3):264-269

Dichlorvos was applied as spray at 1 and 2% concentrations daily for a period of 28 and 21 consecutive days, respectively to buffalo calves. Animals sprayed with 1% dichlorvos displayed mild to moderate clinical signs of toxicosis during the 4th week of exposure. The higher concentration (2%) produced clinical signs of poisoning after 12-16 applications, and was lethal to one of three animals. Daily spraying of dichlorvos at both concentrations inactivated erythrocyte cholinesterase (ChE) (15-21%), plasma ChE (17-20%) and serum carboxylesterase (5-10%) within 3 days. The extent of inhibition of esterases was increased with repeated treatment and maximal inhibition of erythrocyte ChE (80-89%), plasma ChE (81-91%) and serum carboxylesterase (33-54%) with 1 and 2% concentrations was observed on the 28th and 21st day after start of application, respectively. In surviving animals, blood esterases remained inactivated to the extent of 14-65% on the 14th day after the termination of treatment. Dichlorvos at both concentrations significantly (P less than 0.01) elevated the serum levels of aspartate aminotransferase, alanine aminotransferase, acid phosphatase and alkaline phosphatase. The activities of these enzymes in surviving animals recovered to control values within 14 days after the final application of dichlorvos.  相似文献   

硼酸处理对Sensatiou芒果成熟的影响          下载免费PDF全文

曾燕如  SrivastavaGC  PandeyM  PrasadNK. 《浙江农林大学学报》1996,13(3):263-269

用10mmolL-1 硼酸处理Sensatinn芒果果实,日的在于了解硼酸时延缓成熟过程,尤其对延缓那些与成熟有关的生理变化是否有一定的作用。8d的成熟过程所观浏的结果表明.①硼酸处理的鲜果质量下降不如对照明显,果皮中叶绿素含量的变化也类似,②硼酸处理的果实中,果胶甲脂酶及多聚半乳糖醛酸酶的活性高于时照,且果胶甲酷酶的活性比多聚半乳糖醛酸酶的活性早2d达到峰值,⑧与对照相比较,硼酸能降低果实的呼吸作用,而时果肉的总糖含量没有影响。  相似文献   

Efficacy of single and multiple doses of fenbendazole against gill parasites (Dactylogyrus sp.) of Labeo rohita (Hamilton, 1822) and its physio‐metabolic effects on the fish     

Gyandeep Gupta  Arunava Chatterjee  Munish Kumar  Parimal Sardar  Tincy Varghese  Prem Prakash Srivastava  Subodh Gupta 《Aquaculture Research》2020,51(3):1190-1199

The study was conducted to investigate the efficacy and physio‐metabolic responses of single and multiple doses of fenbendazole (FBZ) in Labeo rohita against gill parasite (Dacylogyrus sp.). Two Isoenergetic (395 Kcal DE/100 g) and isonitrogenous (35% CP) purified diets viz. control (without FBZ) and treatment (0.2% FBZ) were prepared. The efficacy of FBZ was measured after administration of single dose (20 mg/kg b. wt.) on 0th day and multiple doses of FBZ, that is, 20 mg/kg b. wt. on 0th, 3rd and 7th day through diet. Although oral administration of FBZ at single dose could significantly reduce the parasite in fish in comparison with the control group, 100% efficacy of the drug was not achieved up to 15th day of treatment. On the other hand, multiple doses of FBZ could show almost 100% efficacy on 15th day in terms of elimination of parasites from gill. The drug induced oxidative stress in examined fish. There was no significant change in activities of hepatic and muscle aspartate aminotransferase and alanine aminotransferase of L. rohita up to 15th day after oral administration of FBZ at single dose. But both single and multiple doses of FBZ could significantly enhance the hepatic superoxide dismutase, catalase and glutathione‐S‐transferase activities in fish up to 7th day of drug administration and significantly decreased thereafter up to 15th and/or 30th day. It is concluded that oral administration of FBZ at multiple doses (20 mg/kg b. wt.) on 1st, 3rd and 7th day could be effective against Dactylogyrus sp. infection in L. rohita.  相似文献   

Long‐term changes in the floristic composition and soil characteristics of reclaimed sodic land during eco‐restoration     

Pankaj Kumar Srivastava  Baleshwar  Soumit Kumar Behera  Nandita Singh  Radhey Shyam Tripathi 《植物养料与土壤学杂志》2011,174(1):93-102

The study was conducted under the “Uttar Pradesh Sodic Lands Reclamation Project” to examine changes that occurred in the reclaimed sodic land in two districts of Uttar Pradesh, India. The study focuses on long‐term seasonal changes in the floral diversity and soil characteristics of the reclaimed sodic land over a period of 10 y. The changes in the floristic composition, plant density, and soil characteristics (microbial biomass carbon [MBC], pH, exchangeable‐sodium percentage (ESP), and electrical conductivity) were compared among the different study plots after different years of sodic‐land reclamation. The study plots comprised reclaimed land with rice–wheat cultivation; semireclaimed land under rice cultivation only and nonreclaimed barren sodic land. There was a significant variation in the floristic composition of the three study plots. Dominance in the floristic composition was shifted from monocotyledonous weeds in the nonreclaimed sodic land to dicotyledonous weeds in the reclaimed land after 10 y of reclamation. Among the soil characteristics, the most remarkable changes were observed in soil MBC and ESP during the course of sodic‐land reclamation. Soil MBC increased up to 480% and ESP values decreased up to 79% in the reclaimed plots with reference to the nonreclaimed plots. The soil amelioration was more pronounced in the upper layer (0–30 cm) as compared to the lower layer (below 30 cm depth). A positive significant correlation was revealed between soil MBC and floristic composition of the reclaimed plots. These changes in floristic composition and soil characteristics could be used as good indicators of the eco‐restoration of the sodic lands. The present study provides useful insights in understanding the temporal progress of eco‐restoration in the reclaimed sodic lands.  相似文献   

Late Quaternary alluvial fans and paleosols of the Kangra basin,NW Himalaya: Tectonic and paleoclimatic implications   总被引：1，自引：0，他引：1  

P. Srivastava  M.K. Rajak  L.P. Singh 《CATENA》2009

The paper describes Late Quaternary pedosedimentary sequences of the alluvial fans from the Kangra basin of NW Himalayas for tectonic and paleoclimatic implications. In the proximal part of the Kangra basin three coalescing alluvial fans, namely Rait-Rihlu fans (~ 65 km²), Kangra fans (~ 200 km²), and Palampur fans (~ 170 km²) from west to east evolved due to reactivation of longitudinal and transverse faults and climatic changes during the Late Quaternary. The fans are characterised by subsidence of Rait-Rihlu fans, uplift of Kangra fans and tilting of Palampur fans. The thick (~ 90 m) pedosedimentary sequences exposed along the rivers characterise the dominant formative processes over the fans. The stream flow sediments dominate the Rait-Rihlu fans, whereas the debris flow sediments dominate the Kangra and Palampur fans. The fan sequences are also marked by the formation of strongly developed paleosols on loess (L1–L3 loess paleosols) and weakly developed paleosols on fluvial deposits in response to the tectonics and climate change in NW Himalayas.  相似文献   

Disposition kinetics,urinary excretion and dosage regimen of kanamycin in buffalo calves following single intravenous administration     

S. Rampal  A. K. Srivastava  R. K. Chaudhary 《Veterinary research communications》1993,17(3):219-225

The disposition kinetics and appropriate dosage regimen for kanamycin were investigated in buffalo calves following a single intravenous dose of 10 mg/kg body weight. The distribution and elimination half-lives were 0.12±0.01 h and 1.94±0.11 h, respectively. The apparent volume of distribution and total body clearance were 0.2±0.01 L/kg and 92.9±3.69 ml/kg/h, respectively. About 74% of the administered dose was excreted in urine in 24 h. A suitable dosage regimen for the intravenous administration of kanamycin was also calculated.Abbreviation SEM standard error of the mean  相似文献   

Disposition kinetics and dosage regimen of sulfapyridine in buffalo (Bubalus bubalis).     

A K Srivastava  S Rampal  R K Chaudhary 《Acta veterinaria Hungarica》1992,40(1-2):113-119

The disposition kinetics and dosage regimen of sulfapyridine were studied in buffalo calves following a single intravenous dose of 100 mg/kg. Distribution half-life (t1/2 alpha) elimination half-life (t1/2 beta) and Vd (area) was 0.181 +/- 0.008 h, 13.4 +/- 0.52 h and 0.59 +/- 0.03 L kg-1, respectively. Total body clearance, which represents the sum of all clearance processes, and tissue/plasma (T/P) ratio were calculated to be 31.1 +/- 2.28 ml kg-1 h-1 and 2.25 +/- 0.09, respectively. A satisfactory intravenous dosage regimen of sulfapyridine in buffalo would be 104 mg/kg followed by 75 mg/kg at 24 h intervals.  相似文献   

Pharmacokinetics of ampicillin and amoxycillin in Bubalus bubalis following intramuscular administration     

H N Khanikor  A K Srivastava  B S Paul  J K Malik 《Acta veterinaria Hungarica》1986,34(3-4):225-230

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Lymphocyte stimulation response in horses against phytohaemagglutinin and M protein of Streptococcus equi using whole blood.          下载免费PDF全文

S K Srivastava  D A Barnum 《Canadian journal of veterinary research》1982,46(1):51-56

Lymphocyte stimulation was observed in whole equine blood in the presence of phytohaemagglutinin and M protein extracted from a typical strain of Streptococcus equi. Blood samples were collected from several healthy horses and horse and pony foals and cultured in vitro with varying concentrations of phytohaemagglutinin and M protein for several days. Phytohaemagglutinin was found to induce lymphocyte stimulation in these animals. Highest mean stimulation indices in horse foals (49.3 +/- 24.4) and pony foals (54.7 +/- 32.0) were observed with 0.625 and 1.25 micrograms/mL phytohaemagglutinin, respectively, at either 72 or 96 hours of incubation. Significantly higher radioactive counts per minute in horse and pony foals were recorded in blood cultures incubated with 0.625 and 1.25 micrograms/mL phytohaemagglutinin. M protein induced a dose related stimulation response in adult horses. Maximum stimulation indices were observed against 125 micrograms/mL M protein at 96 hours. These stimulation indices were higher in adult horses (40.0 +/- 2.2) than observed in pony foals (14.4 +/- 15.7). Higher stimulation levels in adult horses indicated either nonspecific stimulation against M protein or previous exposure of these animals to S. equi.  相似文献   

Growth and reproduction in mandya ewes as affected by low and high levels of crude protein     

M L Chaturvedi  R K Srivastava 《The Indian veterinary journal》1971,48(6):605-608

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