Read-only memory disk with AgOx super-resolution mask layer

A novel read-only memory (ROM) disk with an AgOx mask layer was proposed and studied in this letter. The AgOx films sputtered on the premastered substrates, with pits depth of 50 nm and pits length of 380 nm, were studied by an atomic force microscopy. The transmittances of these AgOx films were also measured by a spectrophotometer. Disk measurement was carried out by a dynamic setup with a laser wavelength of 632.8 nm and a lens numerical aperture (NA) of 0.40. The readout resolution limit of this setup was λ/(4NA) (400 nm). Results showed that the super-resolution readout happened only when the oxygen flow ratios were at suitable values for these disks. The best super-resolution performance was achieved at the oxygen flow ratio of 0.5 with the smoothest film surface. The super-resolution readout mechanism of these ROM disks was analyzed as well.

Generation of 210 fs laser pulses at 1093 nm by a self-starting mode-locked Yb:GYSO laser

We report the first demonstration, to our knowledge, of the femtosecond laser operation by using a new alloyed Yb:GYSO crystal as the gain medium. With a 5 at. % Yb3+-doped sample and chirped mirrors for dispersion compensation, we obtained pulses as short as 210 fs at the center wavelength of 1093 nm. The average mode-locking power is 300 mW, and the pulse repetition frequency is 80 MHz. (C) 2008 Optical Society of America

博优210的选育、示范与推广

博优210是华南晚籼杂交稻的“高优”组合，1993和1994年通过省区试和大面积试种表证，1995年5月通过广东省品种委员会审定，具国内同类型品种领先水平。其主要技术经济指标：1、米质1级至特2级（达出口标准），精米率75％，正精米率71％；2、两年省区试产量名列第二位和第一位，比对照组合增产1％和2％，大田一般亩产450公斤；高产的552公斤，比主栽组合博优64增产30公斤；3、高抗稻瘟病，中抗白叶枯病，后期较耐低温；4、较早熟，全生育期118天，比主栽组合博优64早2至3天；5、制种容易，一般亩产200公斤。由于综合性状优良，而具有较高的经济效益和社会效益，种1亩博优210可增值219元，另因少施或不施农药，减少环境污染，而具有一定的生态效益。

博优210的选育及相关理论研究

博优210是华南晚籼杂交稻的“高优”组合，1993和1994年通过省区试和大面积试种表证，1995年5月通过广东省品种委员会审定，具国内同类型品种领先水平。其主要技术经济指标：1、米质1级至特2级（达出口标准），精米率75％，正精米率71％；2、两年省区试产量名列第二位和第一位，比对照组合增产1％和2％，大田一般亩产450公斤；高产的552公斤，比主栽组合博优64增产30公斤；3、高抗稻瘟病，中抗白叶枯病，后期较耐低温；4、较早熟，全生育期118天，比主栽组合博优64早2至3天；5、制种容易，一般亩产200公斤。由于综合性状优良，而具有较高的经济效益和社会效益，种1亩博优210可增值219元，另因少施或不施农药，减少环境污染，而具有一定的生态效益。博优210均适宜华南各省晚稻区种植，越南亦大量引进试种。种植面积发展异常迅速，1993年3600亩，1994年10万亩，1995年约90万亩，预计1996年将超过300万亩，行家预测，博优210在“九五”期间必将成为华南晚稻主栽组合。发表在《中国水稻科学》等7篇论文，是杂交稻优质育种和优质高产育种的规律性研究结果，对杂交稻育种具有一定指导意义。成果达国内领先水平。

~(210)Pb和~(137)Cs法对比研究武汉东湖现代沉积速率

对采自东湖 站和 站的沉积物采用210Pb和137Cs相结合的方法测定沉积速率,210Pb法测出东湖 站和 站的沉积速率为8.73mm/a和6.90mm/a,137Cs测出东湖 站和 站的沉积速率为7.4mm/a和5.8mm/a.分析了两种方法测定结果差异产生的原因,并与以往的研究相对比,探讨东湖沉积速率空间分布的规律性,沉积速率变化与人类活动的关系、沉积速率与扰动的关系.

Assessing soil erosion rates on manually-tilled hillslopes in the Sichuan Hilly Basin using Cs-137 and Pb-210(ex) measurements

IEECAS SKLLQG

铅－210、钍－228、钚年代学在滇池、洞庭湖和昆明湖环境问题上的应用

笔者在大量的文献调研基础上，试图利用 ~(210)Pb、~(228)Th 等短半衰期的铀系子体确定某些湖泊沉积物的沉积速率及年代，结合 239，240 pu 在我国内陆湖泊的分布规律，以全球 pu 随时间的分布规律探索其测年的可能性，以多核素方法探讨测年结果的可靠性，建立沉积的时间尺度。同时，利用这些核素作示踪研究沉积物表层的生物扰动所造成的混合效应。通过对沉积物垂直方向上物质成份。矿物成份和元素分析，研究沉积环境的演化及近百年工业污染的历史。根据所选湖泊的纬度差别，研究湖泊沉积环境和沉积物类型对所研究的核素方法的影响。本论文是首次利用多核素方法研究我国一些内陆湖泊的环境问题，对在我国继续开展这方面研究具有重要意义。

Study of the Adsorption of Fibrinogen on Gold-Coated Silicon Wafer by an Impedance Method

In 0.1 mol/l KH2PO4–Na2HPO4 (pH 7.80) buffer solution, the potential of zero charge (PZC) and the open circuit potential of gold-coated silicon were determined to be about −0.6 and +0.10 V (vs SCE), respectively. The open circuit potential was higher than the PZC, which indicated that the surface of the gold-coated electrode had a positive charge. The ellipsometry experiment showed that the adsorption of fibrinogen onto the gold-coated silicon wafer surface arrived at a saturated state when the adsorption time exceeded 50 min. The percentage of surface without adsorbed protein, θ, was about 63%. This means that the proportion of surface actually occupied by fibrinogen was only about 37% after the adsorption arrived at saturation. The solution/protein capacitance value was determined in an impulse state around −0.59 V (vs SCE) and was stable (4.2×10−5 F) at other potentials.