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Methodological impact of starch determination on starch content and ileal digestibility of starch in grain legumes for growing pigs 被引量:1
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作者 Dagmar Jezierny Rainer Mosenthin +2 位作者 Nadja Sauer Klaus Schwadorf Pia Rosenfelder-Kuon 《Journal of Animal Science and Biotechnology》 SCIE CAS CSCD 2017年第2期459-466,共8页
Background: Grain legumes represent a valuable energy source in pig diets due to their high starch content. The present study was conducted to determine the content and apparent ileal digestibility(AID) of starch i... Background: Grain legumes represent a valuable energy source in pig diets due to their high starch content. The present study was conducted to determine the content and apparent ileal digestibility(AID) of starch in different grain legume cultivars for pigs by means of both a polarimetric and enzymatic method for starch determination.Methods: Three experiments were conducted with six barrows each which were fitted with ileal T-cannulas. In total, 18 diets including six different cultivars of faba beans(Vicia faba L.) and peas(Pisum sativum L.), five different cultivars of lupins(Lupinus luteus L., Lupinus angustifolius L.), and one diet with a soybean meal(SBM) were fed.Results: The starch content of faba beans and peas was greater(P &lt; 0.05) when determined polarimetrically than enzymatically(438 vs. 345 g/kg dry matter(DM) in faba beans and 509 vs. 390 g/kg DM in peas, respectively).Considerable lower starch contents were obtained in lupins and SBM, with 82 and 48 g/kg DM(analyzed polarimetrically) and &lt;1.1 and 3 g/kg DM(analyzed enzymatically), respectively. Mean values for contents of neutral detergent fiber(NDF) and acid detergent fiber(ADF) in grain legumes ranged from 111 and 79 g/kg DM in peas to248 and 207 g/kg DM in lupins, respectively. Contents of condensed tannins in the colored flowered faba bean cultivars ranged from 2.1 to 7.4 g/kg DM. The AID of starch was greater(P &lt; 0.05) in pea than in faba bean cultivars,and using the polarimetric starch determination method resulted in greater(P &lt; 0.05) digestibility values than using enzymatic starch analysis(84 vs. 80% in faba beans and 86 vs. 83% in peas). Moreover, AID of starch differed(P &lt; 0.05)within pea cultivars and starch digestibility in faba beans decreased linearly(P &lt; 0.05) as the content of condensed tannins increased. However, there was no relationship between contents of NDF and ADF and AID of starch in pea and faba bean cultivars.Conclusion: Both contents and AID of starch in grain legumes can vary as influenced by the analytical method used for starch determination. Generally, starch digestibility is greater when measured by polarimetric rather than enzymatic methods. 展开更多
关键词 Grain legumes growing pigs Ileal starch digestibility Starch determination method
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AN ENSEMBLE FORECAST EXPERIMENT OF A LANDING TYPHOON 被引量:5
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作者 谭燕 梁旭东 《Journal of Tropical Meteorology》 SCIE 2012年第3期314-321,共8页
Based on the Global Regional Assimilation and Prediction System-Tropical Cyclone Model(GRAPES-TCM),an ensemble forecast experiment was performed,in which Typhoon Wipha during the period immediately prior to landfall w... Based on the Global Regional Assimilation and Prediction System-Tropical Cyclone Model(GRAPES-TCM),an ensemble forecast experiment was performed,in which Typhoon Wipha during the period immediately prior to landfall was selected for the study and the breeding of growing mode(BGM) method was used to perturb the initial conditions of the vortex field and the environment field.The results of the experiment indicate that each member had a different initial status in BGM processing and they show a reasonable spread among members along with the forecast phase.Changes in the large-scale field,thermodynamic structure,and spread among members took place when Wipha made landfall.The steering effect of the large-scale field and the interaction between the thermodynamics and the dynamics resulted in different tracks of the members.Meanwhile,the forecast uncertainty increased.In summary,the ensemble mean did not perform as well as the control forecast,but the cluster mean provided some useful information,and performed better than the control in some instances.The position error was 34 km for 24 h forecast,153 km for 48 h forecast,and 191 km for 66 h forecast.The strike probability chart qualitatively described the forecast uncertainty. 展开更多
关键词 landing typhoon ensemble forecast GRAPES-TCM breeding of growing mode method cluster analysis
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New method to grow preferentially-oriented 4H-SiC films on Si substrate 被引量:1
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作者 Zhengping Fu Beifang Yang +2 位作者 Ruchuan Liu Pengxian Zhang Yaozhong Ruan 《Chinese Science Bulletin》 SCIE EI CAS 1999年第6期575-576,共2页
SILICON carbide, a semiconductor with chemistry inertia, is well suited to fabricate optoelectronic device working at high temperature, high power, high frequency, and in high radiation environments. Among the hundred... SILICON carbide, a semiconductor with chemistry inertia, is well suited to fabricate optoelectronic device working at high temperature, high power, high frequency, and in high radiation environments. Among the hundreds of SiC polytypes, 4H-SiC, with a wider bandgap, a higher and much less anisotropic electron mobility than 6H-SiC, has aroused much attention . 展开更多
关键词 SiC XRD New method to grow preferentially-oriented 4H-SiC films on Si substrate PMDA high
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