Hariprasad K.V.,University of Reading |
Hariprasad K.V.,Agricultural College |
van Emden H.F.,University of Reading
International Journal of Pest Management | Year: 2014
Brassica cultivars with varying degrees of partial plant resistance were fed to larvae (up to 4th instar) of the diamondback moth (DBM), Plutella xylostella, and were bioassayed by topical application of cypermethrin to investigate the interaction of plant resistance with insecticide. Larvae reared on the least preferred brassica, Minicole, showed a significantly higher LD50 value than those on the most preferred brassica, Chinese cabbage. Bioassay of 4th instar DBM larvae fed on artificial diet containing pure compounds of glucosinolates revealed a negative interaction between their susceptibility to cypermethin and certain glucosinolates (in particular sinigrin), suggesting that such compounds induced the production of insecticide-detoxifying enzymes. © 2014 Taylor & Francis.
Assaminew S.,Agricultural College |
Ashenafi M.,Addis Ababa Institute of Technology
Livestock Research for Rural Development | Year: 2015
The study was conducted on private urban and periurban dairy production systems around Holetta, Central Highland of Ethiopia, with the objective to assess the existing feed formulation and feeding of crossbred dairy cows in terms of nutrient supply in relation to the performances. Structured questionnaire and laboratory analysis for home-mixed concentrate were employed to generate data from a total of 60 dairy farms. The average of home-mixed concentrates chemical composition for urban and periurban farm, respectively, were 209 and 224 g/kg dry matter (DM) of crude protein (CP), 3.85 and 5.28 g/kg DM calcium (Ca) and 10.6 and 9.74 g/kg DM of phosphorus (P). The nutrients supplied per kg of milk through home-mixed concentrates for urban and periurban crossbred dairy cows, respectively, were 92.6 and 93.5 g CP, 1.70 and 2.21 g Ca and 4.69 and 4.04 g P. The average daily milk yield (ADMY)/cow/day, calving interval(CI) and days open(DO) for urban and periurban farms, respectively, were 11.1 and 9.28 kg, 14.3 and 15.4 months, and 152 and 176 days. Significant variations in terms of nutrient supply through home-mixed concentrate between the production subsystems of the study site existed. Thus, big variations in nutrient supply and imbalances resulted in an apparently low performance of dairy animals in terms of ADMY, CI and DO as compared to what was expected. © 2015, Fundacion CIPAV. All rights reserved.
Bhagya D.,Kerala University |
Prema L.,Agricultural College |
Rajamohan T.,Kerala University
Asian Pacific Journal of Tropical Medicine | Year: 2012
Objective: To investigate whether tender coconut water (TCW) mitigates oxidative stress in fructose fed hypertensive rats. Methods: Male Sprague Dawley rats were fed with fructose rich diet and treated with TCW (4 mL/100 g of body weight) for 3 subsequent weeks. Systolic blood pressure was measured every three days using the indirect tail cuff method. At the end of the experimental period, plasma glucose and insulin, serum triglycerides and free fatty acids, lipid peroxidation markers (MDA, hydroperoxides and conjugated dienes) and the activities of antioxidant enzymes were analyzed in all the groups. Results: Treatment with TCW significantly lowered the systolic blood pressure and reduced serum triglycerides and free fatty acids. Plasma glucose and insulin levels and lipid peroxidation markers such as MDA, hydroperoxides and conjugated dienes were significantly reduced in fructose fed rats treated with TCW. Activities of antioxidant enzymes are up regulated significantly in TCW treated rats. Histopathological analysis of liver showed that TCW treatment reduced the lipid accumulation and inflammatory infiltration without any significant hepatocellular damage. Conclusions: The overall results suggest that, TCW treatment could prevent and reverse high blood pressure induced by high fructose diet probably by inhibition of lipid peroxidation, upregulation of antioxidant status and improved insulin sensitivity. © 2012 Hainan Medical College.
Shashidhara K.S.,Agricultural College
International Journal of Pharma and Bio Sciences | Year: 2015
Immobilization of α-Amylase produced by a Pseudomonas sp isolated from Indian Chicken feather was studied. Partially purified enzyme with 486.77 IU and specific activity of 811.28 units mg (protein)-1 was used for immobilization study. An easily available and inexpensive 3% Sodium alginate matrix with easy immobilization gel entrapment procedure was used for trapping the enzyme showed 555.5 IU activity. The optimization was carried out to study the catalytic properties which showed the optimum pH, temperature and substrate concentration at pH 7, 45°C and 16mg, respectively. The reusability of the immobilized enzyme preparation showed its use in continuous starch hydrolysis for up to 10 cycles. This immobilized enzyme can be used as a replacement of commercial enzyme since it has shown same greater operational flexibility and enzymatic activity of the pure enzyme.
Prasanthi K.,Kerala Agricultural University |
Venkateswaralu B.,Agricultural College
Journal of Tropical Agriculture | Year: 2014
A field experiment was carried out during kharif 2011 to study the effect of different planting patterns in fodder maizelegumes intercropping systems on fodder quality as compared to sole cropping. Total dry matter production was higher in plots of maize in pairs plus cowpea followed by maize in pairs plus cluster beans. The treatment combination involving maize in pairs + cowpea produced the highest crude protein and chlorophyll contents (7.81% and 2.98 mg g-1) and the lowest values (6.38% and 2.2 mg g-1) were recorded in sole maize. Higher crude fibre content was observed in sole crop of fodder maize as compared to the different intercropping systems. © 2014, Kerala Agricultural University. All rights reserved.