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101.
P. Satyanarayana 《The Journal of Horticultural Science and Biotechnology》2013,88(2):112-125
The toxicity of deposits of DDT on leaves as a contact insecticide is affected by factors tending to reduce the deposits. Among these is penetration of DDT into the leaf-tissue where it is lost for this purpose. A study was made of the influence of formulation upon penetration as judged both by chemical recovery of DDT from the surface of treated apple leaves and by the toxicity of deposits on such leaves to the stored-products pest, Tribolium confusum Duv. Penetration was shown to increase from suspension through emulsion to solution and also, relatively, as the concentration of DDT in a given formulation was reduced. The rate of loss of these superficial deposits by weathering was found to fall off regularly with time of exposure. The DDT inside the leaf was not available as an insecticide for the insect used in these tests. 相似文献
102.
A. Chaturvedi G. Sarojini G. Nirmala N. Nirmalamma D. Satyanarayana 《Plant foods for human nutrition (Dordrecht, Netherlands)》1997,50(2):171-178
Glycemic index of grain amaranth, wheat and rice preparations was studied in noninsulin dependent diabetic subjects. Diets
containing 50 g carbohydrate equivalent were given and post-prandial blood glucose estimated at different intervals. Glycemic
index calculated for different experimental diets showed that GI of amaranth-wheat composite flour diet (25∶75) was the least
(65.6%) followed by wheat diet (65.7%), rice diet (69.2%), amaranth-wheat flour 50∶50 (75.5%), and popped amaranth in milk
(97.3%). Therefore 25∶75 combination of amaranth and wheat, wheat and rice can be considered low GI food, 50∶50 grain amaranth
and wheat medium GI food and popped amaranth and milk combination high GI food. 相似文献
103.
Reproductive Performance of Gilts with Similar Age but with Different Growth Rate at the Onset of Puberty Stimulation 总被引:1,自引:0,他引:1
R Kummer ML Bernardi AC Schenkel WS Amaral Filha I Wentz FP Bortolozzo 《Reproduction in domestic animals》2009,44(2):255-259
The aim of this study was to evaluate the reproductive performance of gilts that had a similar age but different weights at the onset of puberty stimulation by boar exposure at 144 days. Gilts were divided into two groups according to their lifetime growth rate from birth to approximately 144 days of age. Mean growth rates at this moment were 577 and 724 g/day for group 1 (G1; n = 58) and group 2 (G2; n = 58), respectively. After selection, gilts were weighed at approximately 155, 165 and 175 days of age, on the insemination day and at slaughter. Gilts were inseminated, on average, at 193 days of age and were slaughtered 32 days after insemination, when the number of corpora lutea and embryos were recorded. Higher growth rate gilts (G2) reached puberty earlier (155.3 vs 164.1 days; p < 0.01). More gilts of G2 group attained puberty by 190 days of age (p = 0.004) than G1 gilts (95%; 55/58 vs 76%; 44/58). The anoestrous rate, until 60 days after the onset of boar exposure was higher (p < 0.01) in G1 (19.0%; 11/58) than in G2 (3.4%; 2/58) group. However, there were no differences in the pregnancy rate (90.7 vs 94.5), ovulation rate (15.9 vs 16.5), total embryos (12.9 vs 11.7), viable embryos (12.0 vs 11.1) and embryo survival (73.7% vs 68.5%), between G1 gilts and G2 gilts, respectively (p > 0.05). High growth rate gilts attain puberty earlier and have a lower anoestrous rate than low growth rate gilts. 相似文献
104.
105.
GH Miller JW Magee BJ Johnson ML Fogel NA Spooner MT McCulloch LK Ayliffe 《Science (New York, N.Y.)》1999,283(5399):205-208
More than 85 percent of Australian terrestrial genera with a body mass exceeding 44 kilograms became extinct in the Late Pleistocene. Although most were marsupials, the list includes the large, flightless mihirung Genyornis newtoni. More than 700 dates onGenyornis eggshells from three different climate regions document the continuous presence of Genyornis from more than 100,000 years ago until their sudden disappearance 50,000 years ago, about the same time that humans arrived in Australia. Simultaneous extinction of Genyornis at all sites during an interval of modest climate change implies that human impact, not climate, was responsible. 相似文献