Temperature during grain ripening has been shown to affect amylose content and gelatinization temperature of rice starch (1–6). These studies demonstrated that high ambient temperature results in lower amylose content and higher gelatinization temperature of the starch. Rice starches obtained from rice grains that matured at lower temperature had higher iodine blue values and were more susceptible to alkali digestion than those that ripened at higher temperature. 相似文献
1. The purpose of this work was to support decision-making in poultry farms by performing automatic early detection of anomalies in egg production.
2. Unprocessed data were collected from a commercial egg farm on a daily basis over 7 years. Records from a total of 24 flocks, each with approximately 20 000 laying hens, were studied.
3. Other similar works have required a prior feature extraction by a poultry expert, and this method is dependent on time and expert knowledge.
4. The present approach reduces the dependency on time and expert knowledge because of the automatic selection of relevant features and the use of artificial neural networks capable of cost-sensitive learning.
5. The optimum configuration of features and parameters in the proposed model was evaluated on unseen test data obtained by a repeated cross-validation technique.
6. The accuracy, sensitivity, specificity and positive predictive value are presented and discussed at 5 forecasting intervals. The accuracy of the proposed model was 0.9896 for the day before a problem occurs. 相似文献
AIM: To investigate the inhibitory effect of Co-SZ eye drops on apoptosis of lens epithelial cells (LEC) induced by H2O2 and to study the cellular and molecular mechanisms.METHODS: (1) All lenses of Sprague-Dawley rats were incubated with H2O2 and Co-SZ eye drops.The apoptosis rates of LEC were determined by TUNEL method.The changes of LEC ultrastructure and the formation of apoptotic body were observed by electron microscopy.(2) Bovine LEC were incubated with H2O2 and Co-SZ eye drops.The inhibitory of LEC apoptosis was detected by MTT after incubation.The changes of fractional DNA content in LEC were detected by flow cytometry (FCM).[Ca2+]i , cAMP and cGMP of LEC were determined by spectrofluoremeter and radioimmunoassay, respectively.RESULTS: The LEC apoptosis rates in Co-SZ eye drops group were decreased significantly compared with H2O2 group by TUNEL.The ultrastructure changes in LEC of Co-SZ eye drops group were lighter than that in H2O2 group.The LEC apoptosis rates of Co-SZ eye drops group were dose-dependently decreased significantly compared with H2O2 groups via MTT assay.LEC apoptosis induced by H2O2 was inhibited by Co-SZ eye drops, and showing dose-dependent.The DNA contents in LEC of Co-SZ group were increased.The [Ca2+]i and cAMP in Co-SZ group were decreased obviously.The cGMP was increased.CONCLUSION: The LEC apoptosis induced by H2O2 was inhibited by Co-SZ eye drops.The mechanism of apoptosis inhibition by Co-SZ eye drops maybe contribute to the increase in DNA content.The signal transduction mechanisms are related to the decrease in [Ca2+]i and cAMP and the increase in cGMP. 相似文献