389 research outputs found
Nan Song quan shi
No full text"Nan Song quan shi" wei yi bu gui mo jiao da de quan mian yan jiu nan Song li shi de zhuan zhu, ben shu wei qi di 3, 4 juan dian zhang zhi du xia juan. Dian zhang zhi du shi yi ge guo jia de zheng fu zai yi ding shi qi nei hang wei gui fan de ji ben zhun ze. Zhongguo li dai tong zhi zhe da du shi fen zhong shi dian zhang zhi du de jian she, nan Song zheng fu yi shi ru ci.ben shu zhu yao yan jiu de shi nan song de zhi guan, xuan ju, jian cha, fa lü yi ji jun shi zhi d
Research on the Intrinsic Relationship of Customer Value and Corporate Core Competence
No full textAbstractThe article defined customer value and corporate core competence using induction method and described the characteristics of these two concepts. Then the author analyzed the intrinsic relationship of customer value and corporate core competence via the survey and case analysis methods. The author found that customer value was the basic point to cultivate corporate core competence which was the platform to achieve customer value. The article is of great help to provide some ideas of cultivating and developing corporate core competence based on customer value
Inter-Regional Spillovers in China: The Importance of Common Shocks and the Definition of Regions
Get PDFThis paper examines the question of inter-regional spillovers in China. We argue that this is a central question in Chinese economic policy, given the marked regional disparities that exist and the concern of policy-makers to ameliorate them. We analyse this question within the framework of a six-region vectorautoregressive model which we subject to extensive sensitivity analysis, with particular attention paid to the effects on the results of strong common output movements. We find the results of dynamic simulations to be importantly dependent on model specification; in particular, they are sensitive to the order in which the variables enter the model. After an assessment of various alternatives, we are able to specify a model with tolerable robustness by using data which has been purged of the effects of national output fluctuations. We find some expected but also some unexpected results. In the first category, the Yellow River and Changjiang River regions are found to have spillover effects on other regions although they are more extensive for the former; the South Western region has no significant spillover effects on the rest of the country, consistently with the results of previous research. However, in contrast both to other research and to our expectations, shocks to the South Eastern region affect mainly the region itself with little spillover to the other regions. The same is true of the North East region while the North West region has extensive spillovers to other regions. We conclude that there is still much to be learned about the magnitude and timing of inter-regional spillovers before firm policy conclusions can be drawn.
Responses of super rice (Oryza sativa L.) to different planting methods for grain yield and nitrogen-use efficiency in the single cropping season
No full textTo break the yield ceiling of rice production, a super rice project was developed in 1996 to breed rice varieties with super high yield. A two-year experiment was conducted to evaluate yield and nitrogen (N)-use response of super rice to different planting methods in the single cropping season. A total of 17 rice varieties, including 13 super rice and four non-super checks (CK), were grown under three N levels [0 (N0), 150 (N150), and 225 (N225) kg ha ] and two planting methods [transplanting (TP) and direct-seeding in wet conditions (WDS)]. Grain yield under WDS (7.69 t ha) was generally lower than TP (8.58 t ha). However, grain yield under different planting methods was affected by N rates as well as variety groups. In both years, there was no difference in grain yield between super and CK varieties at N150, irrespective of planting methods. However, grain yield difference was dramatic in japonica groups at N225, that is, there was an 11.3% and 14.1% average increase in super rice than in CK varieties in WDS and TP, respectively. This suggests that high N input contributes to narrowing the yield gap in super rice varieties, which also indicates that super rice was bred for high fertility conditions. In the japonica group, more N was accumulated in super rice than in CK at N225, but no difference was found between super and CK varieties at N0 and N150. Similar results were also found for N agronomic efficiency. The results suggest that super rice varieties have an advantage for N-use efficiency when high N is applied. The response of super rice was greater under TP than under WDS. The results suggest that the need to further improve agronomic and other management practices to achieve high yield and N-use efficiency for super rice varieties in WDS
Comparative genomic and transcriptomic analysis revealed genetic characteristics related to solvent formation and xylose utilization in <it>Clostridium acetobutylicum </it>EA 2018
Get PDFAbstract Background Clostridium acetobutylicum, a gram-positive and spore-forming anaerobe, is a major strain for the fermentative production of acetone, butanol and ethanol. But a previously isolated hyper-butanol producing strain C. acetobutylicum EA 2018 does not produce spores and has greater capability of solvent production, especially for butanol, than the type strain C. acetobutylicum ATCC 824. Results Complete genome of C. acetobutylicum EA 2018 was sequenced using Roche 454 pyrosequencing. Genomic comparison with ATCC 824 identified many variations which may contribute to the hyper-butanol producing characteristics in the EA 2018 strain, including a total of 46 deletion sites and 26 insertion sites. In addition, transcriptomic profiling of gene expression in EA 2018 relative to that of ATCC824 revealed expression-level changes of several key genes related to solvent formation. For example, spo0A and adhEII have higher expression level, and most of the acid formation related genes have lower expression level in EA 2018. Interestingly, the results also showed that the variation in CEA_G2622 (CAC2613 in ATCC 824), a putative transcriptional regulator involved in xylose utilization, might accelerate utilization of substrate xylose. Conclusions Comparative analysis of C. acetobutylicum hyper-butanol producing strain EA 2018 and type strain ATCC 824 at both genomic and transcriptomic levels, for the first time, provides molecular-level understanding of non-sporulation, higher solvent production and enhanced xylose utilization in the mutant EA 2018. The information could be valuable for further genetic modification of C. acetobutylicum for more effective butanol production.</p
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