不同移栽期烤烟化学成分与香味成分的相关性和主成分分析

为了探讨气候资源配置差异,解决生产后期不利因素制约烟叶成熟、影响烟叶品质的问题,通过适度提前移栽并对不同移栽期烤后烟叶化学成分、香味成分、外观及评吸等54项指标间相关性及主成分分析,发现甜度、糠醛、糠醇、巨豆三烯酮1、巨豆三烯酮4和叶片生长期有效积温均值等6个指标与其余指标间表现出高度的相关性。3月10日移栽烟叶的上部叶色度最好,总氮较高且总糖最低,同时中部叶的甜度最高且苯乙醇含量最低,能较好地符合皖南优质烟质量评价指标体系,生产上可以探索适度提前移栽获得较好中部叶和上部叶的配套栽培措施。     

安徽中籼稻主要产量因子结构研究

以安徽省2000—2005年的中籼稻区域试验和联合鉴定试验的424个品种(组合)为材料,对产量性状作了相关分析及主成份分析。分析结果表明:产量和每穗总粒数、每穗实粒数、结实率、千粒重均呈极显著正相关,与有效穗呈显著正相关,每穗总粒数、每穗实粒数、结实率与有效穗呈极显著负相关,千粒重与有效穗呈负相关。所以在中籼品种(组合)的高产育种中,应以选每穗总粒数、每穗实粒数为主攻目标,即要选育穗大粒多型品种,不必过于追求有效穗和千粒重。穗实粒数、产量与全生育期存在一定的正相关关系,但不显著,即生育期短的品种(组合)也可以实现高产。主成份分析也表明穗实粒数、穗总粒数是高产育种主攻的关键。并在分析基础上提出了中籼稻品种(组合)高产育种策略建议,为中籼新品种(组合)的选育提供参考。     

Multiple realities of the Growth Triangle: Mapping knowledge and the politics of mapping

Abstract: The Singapore‐Indonesia‐Malaysia Growth Triangle has been applauded by the governments of the three nation states, economists and transnational corporations as an economic success. However, other stark realities are evident at the local level as well. The Growth Triangle is supplanting older cultural and economic geographies. This has given rise to struggles over rights to territories and resources. Of the three points in the triangle, it is the landscape of Riau‐Indonesia that has been transformed most dramatically. A comparative study of the cadastral maps of the administrators of the Growth Triangle versus the community maps of the indigenous peoples shows the differences in their perceived spatial ideas of Riau. It also highlights the different systems of knowledge as upheld by the administrators in contrast to that of the indigenous inhabitants. This comparative study brings to attention the issues of knowledge construction, mapping knowledge and the politics of mapping.     

坡耕地蓄水保土耕作技术措施的探讨

根据黄土丘陵区自然环境、社会经济条件,因地制宜地采取与其相适应的水土保持耕作技术措施,以利于蓄水、保土、培肥地力,提高单产,退耕陡坡,还林还草,促使农业生态系统逐渐向良性循环转变。为此,在大面积推广水平沟种植的基础上,进行了覆盖、留茬倒垄、沟内加土挡,坡地草田带状间作轮种、粮草灌宽带间作、川平地覆膜间作套种、深耕密植等水保耕作技术措施的试验研究,并对各种技术措施的蓄水、挡泥、培肥地力、增产增收效益作了评价。     

Fast readout of object identity from macaque inferior temporal cortex

Understanding the brain computations leading to object recognition requires quantitative characterization of the information represented in inferior temporal (IT) cortex. We used a biologically plausible, classifier-based readout technique to investigate the neural coding of selectivity and invariance at the IT population level. The activity of small neuronal populations (approximately 100 randomly selected cells) over very short time intervals (as small as 12.5 milliseconds) contained unexpectedly accurate and robust information about both object "identity" and "category." This information generalized over a range of object positions and scales, even for novel objects. Coarse information about position and scale could also be read out from the same population.     

Monolithic microfabricated valves and pumps by multilayer soft lithography

Soft lithography is an alternative to silicon-based micromachining that uses replica molding of nontraditional elastomeric materials to fabricate stamps and microfluidic channels. We describe here an extension to the soft lithography paradigm, multilayer soft lithography, with which devices consisting of multiple layers may be fabricated from soft materials. We used this technique to build active microfluidic systems containing on-off valves, switching valves, and pumps entirely out of elastomer. The softness of these materials allows the device areas to be reduced by more than two orders of magnitude compared with silicon-based devices. The other advantages of soft lithography, such as rapid prototyping, ease of fabrication, and biocompatibility, are retained.     

杉木连根采掘试验研究

本文通过对杉木全树采伐工艺分析和采掘试验研究。结果表明:杉木连根拔树采掘可延长应用主干28cm,造6m材每单株平均可净增产值25.78元,是一种综合利用杉木资源,提高经济效益的有效途径。     

DCPV－白僵菌－杀灭菊酯复合杀虫剂林间防治试验

本文通过对马尾松毛虫质型多角体病毒（ＤＣＰＶ）、白僵菌、２０％杀灭菊酯三种药剂混合使用的林间正交试验，从中筛选出最佳配比的复合杀虫剂，供生产上推广应用．林间试验结果表明，最佳组合为ＡａＢａＣａ，即ＤＣＰＶ（ＣＰＢ２×１０７个／ｍＬ），白僵菌（１０亿个／ｇ）和２０％杀灭菊酯（１：２万倍液），防治效果达９５．３％，比单一应用ＤＣＰＶ（Ａａ）、白僵菌（Ｂａ）、２０％杀灭菊醌（Ｃａ）分别增效１３．５％，２３．０％和３３．９％．     

Daily rhythm in tyrosine concentration in human plasma: persistence on low-protein diets

The concentration of tyrosine in the plasma of normal males varies diurnally. It is lowest (9.5 +/- 0.35 micrograms per milliliter) between 0130 and 0230 hours and rises to a peak of 16.2 +/- 0.82 micrograms per milliliter by 1030 hours. This rhythm persists when subjects are maintained for 2 weeks on a diet that is very low in protein.     

安徽中籼稻主要产量因子结构研究

以安徽省2000—2005年的中籼稻区域试验和联合鉴定试验的424个品种(组合)为材料,对产量性状作了相关分析及主成份分析。分析结果表明:产量和每穗总粒数、每穗实粒数、结实率、千粒重均呈极显著正相关,与有效穗呈显著正相关,每穗总粒数、每穗实粒数、结实率与有效穗呈极显著负相关,千粒重与有效穗呈负相关。所以在中籼品种(组合)的高产育种中,应以选每穗总粒数、每穗实粒数为主攻目标,即要选育穗大粒多型品种,不必过于追求有效穗和千粒重。穗实粒数、产量与全生育期存在一定的正相关关系,但不显著,即生育期短的品种(组合)也可以实现高产。主成份分析也表明穗实粒数、穗总粒数是高产育种主攻的关键。并在分析基础上提出了中籼稻品种(组合)高产育种策略建议,为中籼新品种(组合)的选育提供参考。