In this paper, the backdrop and significance of the research of germ-remaining rice whitener firstly were expatiated. Then, the study progress in China and overseas was summarized. Lastly, the research prospect of thi...In this paper, the backdrop and significance of the research of germ-remaining rice whitener firstly were expatiated. Then, the study progress in China and overseas was summarized. Lastly, the research prospect of this kind of whitener in China was analyzed. It is hoped that it can coach the design of germ-remaining rice whitener.展开更多
Five catalytic processes and their catalysts will be introduced in my talk. Firstly,the demonstration test(3000 ton/a)results using a novel catalyst Co/SiO2 with egg-shell structure and the strategies for this catalys...Five catalytic processes and their catalysts will be introduced in my talk. Firstly,the demonstration test(3000 ton/a)results using a novel catalyst Co/SiO2 with egg-shell structure and the strategies for this catalyst preparation based on the issues from the mass transfer of produced wax from F-T synthesis will be discussed. Recent progresses on C2-oxygenate synthesis from syngas over a Rh/SiO2 catalyst and a 10 thousands ton/a demonstration test facility in China will be built in 2010 will be reported in the second section. A naphtha and diesel distillate which cut off the heavier end of S-F-A distribution direct synthesis with low methane selectivity from syngas over a Co/AC1 catalyst and a 10000 ton/a demonstration test with a bubble column slurry reactor will be talked about in this speech. A high α-alcohols of C2-C18 direct synthesis with more than 50 wt% selectivity and low methane and methanol selectivities from syngas over a Co2C/AC2 catalyst,a 3000 ton/a demonstration test with a bubble column slurry reactor and the primary fundamental understandings will be detailedly discussed in the forth section. In situ formation of homogeneous active sites on the surface of supported Rh heterogeneous catalysts and their application in hydroformylation of olefins will be introduced in fifth section.展开更多
Heavy oil will play an important role in future resources exploitation.Factors such as reservoir heterogeneity and adverse oil/steam mobility ratio have led to severe steam channeling and fingering,thereby reduced con...Heavy oil will play an important role in future resources exploitation.Factors such as reservoir heterogeneity and adverse oil/steam mobility ratio have led to severe steam channeling and fingering,thereby reduced conformance efficiency and affected de-velopment response.Therefore,the research on profile control and water shut-off agents becomes increasingly important for thermal recovery wells.The requirements on the performances of profile control and water shut-off agents are discussed in conjunction with the physical properties of heavy oil reservoirs and the technical conditions of steam injection in China.Based on the mechanism of action,research progress and application status,5 agents are summarized including polymer gel,solid particles plugging agent,foam,water-in-oil emulsion and salt precipitation.Problems in each agent are mentioned,and optimization solutions are put for-ward.At last,the development trend of future profile control and water shut-off agents is put forward,i.e.synthesizing agents of low cost and high-temperature resistance,intensifying mechanism research,developing composite system,and researching on new technologies that are less harmful and environmental friendly.展开更多
[Objective]In order to reflect the relationship between literatures quickly and efficiently and reveal the evolutionary path and hotspot,and predict the future trend of Lycoris researches.[Methods]In 19902019,CiteSpac...[Objective]In order to reflect the relationship between literatures quickly and efficiently and reveal the evolutionary path and hotspot,and predict the future trend of Lycoris researches.[Methods]In 19902019,CiteSpace software was used for visual graphic analysis authors,institutes and key words related to Lycoris research based on data sources of WOS and CNKI.[Results](1)Domestic researchers have formed a core group of authors in East China,but the cooperation between the different teams is relatively dispersed.(2)From the perspective of international cooperation level,the cocontribution in China is the largest.Among them,the Chinese Academy of Sciences published has the largest number of papers,and higher research level.(3)The research on Lycoris has experienced three stages:slow accumulation period,rapid growth period and stable growth period.And its research direction develops along the route of“interspecific relationship within genuspropagation and cultivationpharmacology and pharmacodynamicscytology and molecular biologycross breeding”.[Conclusion]The research of Lycoris mainly distributed in Asian countries such as China and Japan.On the whole,its research direction is developing from macro to micro.展开更多
我国人多地少,持续提高花生产量是花生栽培的首要目标。建国以来,我国花生高产栽培技术研究与应用取得了长足的进步,形成了独具中国特色的花生高产栽培技术体系,带动了花生整体生产水平的不断提高。回顾和总结我国花生高产栽培历程和经...我国人多地少,持续提高花生产量是花生栽培的首要目标。建国以来,我国花生高产栽培技术研究与应用取得了长足的进步,形成了独具中国特色的花生高产栽培技术体系,带动了花生整体生产水平的不断提高。回顾和总结我国花生高产栽培历程和经验,分析和探讨花生持续增产潜力与途径,有助于进一步提升我国花生高产栽培研究创新能力和整体生产水平。20世纪70年代初期,通过应用增产效果显著的氮磷化肥施用技术,产量突破了6000 kg hm^(-2);70年代末,通过化学调控、地膜覆盖、氮磷钾平衡施肥等关键技术,产量突破了7500 kg hm^(-2);进入20世纪90年代后,通过缓控徒长、量化施肥等关键技术,产量突破了9000kghm^(-2);进入新千年后,通过单粒精播等关键技术,产量突破了11,250 kg hm^(-2);2023年,以单粒精播技术为核心,配套全程可控施肥、“三防三促”群体调控和微生物耦合技术等,构建高产栽培技术体系创造实打验收12,982 kg hm^(-2)的全国高产纪录。据推算花生实际生产能力还有较大的提升空间,培育高潜力品种、充分挖掘土壤生产潜能和构建高质量的群体是未来进一步提高花生产量的主要途径。展开更多
文摘In this paper, the backdrop and significance of the research of germ-remaining rice whitener firstly were expatiated. Then, the study progress in China and overseas was summarized. Lastly, the research prospect of this kind of whitener in China was analyzed. It is hoped that it can coach the design of germ-remaining rice whitener.
文摘Five catalytic processes and their catalysts will be introduced in my talk. Firstly,the demonstration test(3000 ton/a)results using a novel catalyst Co/SiO2 with egg-shell structure and the strategies for this catalyst preparation based on the issues from the mass transfer of produced wax from F-T synthesis will be discussed. Recent progresses on C2-oxygenate synthesis from syngas over a Rh/SiO2 catalyst and a 10 thousands ton/a demonstration test facility in China will be built in 2010 will be reported in the second section. A naphtha and diesel distillate which cut off the heavier end of S-F-A distribution direct synthesis with low methane selectivity from syngas over a Co/AC1 catalyst and a 10000 ton/a demonstration test with a bubble column slurry reactor will be talked about in this speech. A high α-alcohols of C2-C18 direct synthesis with more than 50 wt% selectivity and low methane and methanol selectivities from syngas over a Co2C/AC2 catalyst,a 3000 ton/a demonstration test with a bubble column slurry reactor and the primary fundamental understandings will be detailedly discussed in the forth section. In situ formation of homogeneous active sites on the surface of supported Rh heterogeneous catalysts and their application in hydroformylation of olefins will be introduced in fifth section.
文摘Heavy oil will play an important role in future resources exploitation.Factors such as reservoir heterogeneity and adverse oil/steam mobility ratio have led to severe steam channeling and fingering,thereby reduced conformance efficiency and affected de-velopment response.Therefore,the research on profile control and water shut-off agents becomes increasingly important for thermal recovery wells.The requirements on the performances of profile control and water shut-off agents are discussed in conjunction with the physical properties of heavy oil reservoirs and the technical conditions of steam injection in China.Based on the mechanism of action,research progress and application status,5 agents are summarized including polymer gel,solid particles plugging agent,foam,water-in-oil emulsion and salt precipitation.Problems in each agent are mentioned,and optimization solutions are put for-ward.At last,the development trend of future profile control and water shut-off agents is put forward,i.e.synthesizing agents of low cost and high-temperature resistance,intensifying mechanism research,developing composite system,and researching on new technologies that are less harmful and environmental friendly.
基金Project supported by the National Natural Science Foundation of China(31960327,31560226)Natural Science Foundation of Jiangxi Province(20202BABL205004)。
文摘[Objective]In order to reflect the relationship between literatures quickly and efficiently and reveal the evolutionary path and hotspot,and predict the future trend of Lycoris researches.[Methods]In 19902019,CiteSpace software was used for visual graphic analysis authors,institutes and key words related to Lycoris research based on data sources of WOS and CNKI.[Results](1)Domestic researchers have formed a core group of authors in East China,but the cooperation between the different teams is relatively dispersed.(2)From the perspective of international cooperation level,the cocontribution in China is the largest.Among them,the Chinese Academy of Sciences published has the largest number of papers,and higher research level.(3)The research on Lycoris has experienced three stages:slow accumulation period,rapid growth period and stable growth period.And its research direction develops along the route of“interspecific relationship within genuspropagation and cultivationpharmacology and pharmacodynamicscytology and molecular biologycross breeding”.[Conclusion]The research of Lycoris mainly distributed in Asian countries such as China and Japan.On the whole,its research direction is developing from macro to micro.
文摘我国人多地少,持续提高花生产量是花生栽培的首要目标。建国以来,我国花生高产栽培技术研究与应用取得了长足的进步,形成了独具中国特色的花生高产栽培技术体系,带动了花生整体生产水平的不断提高。回顾和总结我国花生高产栽培历程和经验,分析和探讨花生持续增产潜力与途径,有助于进一步提升我国花生高产栽培研究创新能力和整体生产水平。20世纪70年代初期,通过应用增产效果显著的氮磷化肥施用技术,产量突破了6000 kg hm^(-2);70年代末,通过化学调控、地膜覆盖、氮磷钾平衡施肥等关键技术,产量突破了7500 kg hm^(-2);进入20世纪90年代后,通过缓控徒长、量化施肥等关键技术,产量突破了9000kghm^(-2);进入新千年后,通过单粒精播等关键技术,产量突破了11,250 kg hm^(-2);2023年,以单粒精播技术为核心,配套全程可控施肥、“三防三促”群体调控和微生物耦合技术等,构建高产栽培技术体系创造实打验收12,982 kg hm^(-2)的全国高产纪录。据推算花生实际生产能力还有较大的提升空间,培育高潜力品种、充分挖掘土壤生产潜能和构建高质量的群体是未来进一步提高花生产量的主要途径。
