Research Progresses on Nutrient Quality of Rice Grain and Molecular Breeding Approach

Corresponding author, zjhym@ public xm f j cn[中文文摘]本文综述了稻米营养品质 (蛋白质、赖氨酸和微量营养素 )的经典遗传学和分子遗传学、分子育种的研究现状 ,并对利用分子标记辅助育种方法提高稻米营养品质作了展望。[英文文摘]This paper reviewed the classical and molecular genetic research progresses on nutrient qulity (including protein, lysine and micronutrient) of rice grain and its molecular breeding, furthermore, the molecular markerassisted breeding strategy for nut rient quality improvement was put forward

Research Progresses on Appearance Quality of Rice Grain and Strategies for its Molecular Improvement

Corresponding auther, [email protected] j.cn[中文文摘]本文综述了稻米外观品质 (长、宽、长宽比和垩白 )的经典遗传及分子遗传研究状况 ,归纳列举了已定位的外观品质性状的QTLs,提出了稻米外观品质改良的分子策略[英文文摘]This paper has review ed the classical and molecular genetic research progresses of rice appearance quality,which including traits of grain length, grain width, length- width ratio and chalkiness, and compared the QTLs conferring these traits which was detected by deferent labs using deferent kind populat ions.The authors have put forward the molecular strategy for appearance quality improvement.国家863项目(2002AA211091)及(2001AA211091)资

载体对甲烷催化部分氧化制合成气的影响

运用固定床流动反应装置、ＴＰＲ和ＸＲＤ等手段考察了载体的晶相组成、比表面和孔结构等性质对Ｎｉ基催化剂在甲烷部分氧化制合成气中反应性能的影响。结果表明，热稳定性好、导热好的惰性材料如（Ｃａ）ＭｇＡｌ２Ｏ４等是甲烷部分氧化制合成气理想的催化剂载体。载体必须具有适当的比表面和孔结构，以利于反应物分子在催化剂表面吸附并与活性中心充分接触，同时也有利于产物分子脱附并离开催化剂表面，防止副反应（积碳反应和燃烧反应）的发生，及时把反应热移走，避免热点产生使催化剂失活。另外还发现，具有不同比表面和孔结构的催化剂具有不同的最佳空

Study on the Hydrogenation of CO_2 over YBa_2Cu_3O_(6--7) Superconductor Catalyst

在ybA_2Cu_3O_(6~7)超导催化剂上进行CO_2加氢制醇的反应,研究了温度、压力和空速对催化剂活性和甲醇收率的影响.对催化剂进行了Xrd,原位fT-Ir,XPS,ESr和AfM表征,表明ybA_2Cu_3O_(6~7)在反应状态下被还原分解,铜主要被还原为Cu--+;CO_2加氢制醇的中间态可能为醛基、甲氧基;反应前催化剂粒度较大,反应后催化剂变得松散,粒度变小.The hydrogenation of CQj over YBa^Cu^O^.j superconductor catalyst was investigated using XRD, in - situ FT- IR, XPS, ESR, TPR and ATM techniques.It is shown that the CH3OH selectivity is directly proportional to the reaction pressure and space velocity, but is inversely proportional to the reaction temperature.The Cu2+ ions in YBa2Cu3O6--7 were mainly reduced to Cu+ in the presence of H2 and CO2.The intermediates in the catalytic reaction might be aldehyde and methoxy radical.During the hydrogenation the catalyst might be decomposed.国家自然科学基金(29573128);国家博士后科学资金资助课

Study on the hydrogenation of CO2 over YBa2Cu3O6 similar to 7 superconductor catalyst

The hydrogenation of CO2 over YBa2Cu3O6 similar to 7 superconductor catalyst was investigated using XRD, in - situ FT - IR, XPS, ESR, TPR and AFM techniques. It is shown that the CH3OH selectivity is directly proportional to the reaction pressure and space velocity, but is inversely proportional to the reaction temperature. The Cu2+ ions in YBa2Cu3P6 similar to 7 were mainly reduced to Cu+ in the presence of H-2 and CO2. The intermediates in the catalytic reaction might be aldehyde and methoxy radical. During the hydrogenation the catalyst might be decomposed

PREPARATION OF SiO 2 AEROGEL AND PORES DISTRIBUTION

通讯作者：于作龙 中国科学院成都有机化学研究所[中文摘要]本文以正硅酸乙酯（ＴＥＯＳ）为原料，水和乙醇为溶剂，盐酸和氨水为催化剂，采用溶胶－凝胶，水热合成和低温冷冻干燥等工艺，制备了ＳｉＯ２气凝胶，研究了ｐＨ值、ＴＥＯＳ浓度及焙烧温度对气凝胶的比表面积、孔径分布的影响。结果表明：在碱性条件下，制得的气凝胶比表面积较大，孔径较窄。气凝胶在较高温度下，比表面积有所下降，孔径略微变粗。[英文摘要]The SiO 2 aerogel was synthesized from TEOS, EtOH and H 2O using Sol-gel, hydrothermal and low temperature drying technique depending on catalyst HCI or NH 3 The influence of the pH value of the original hydrogel, TEOS concentration and drying temperature on surface area, pore distribution of aerogel were investigated In our experimental scope when pH=9 3, the resultant SiO 2 aerogel has higher surface area, narrower and smaller pore distribution Having been dried in higher temperature, the surface area and pore distribution of areogel are lower and wider.国家自然科学基