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High-order harmonic radiation with noble gas and N〓 in static gas target has been obtained, and the effects on high-order harmonic efficiencies due to laser intensities , polarization, gas densities, confocal parameter, media characteristic and phase mismatch have been discussed. The experimental results show that the high-order intensities grow with the incident laser intensities and gas densities, and high-order harmonic signals amplify in the same time.

高次谐波辐射是强场物理中与电离过程相伴而生另一种重要过程,本文利用飞秒激光在静态气室中获得全部的稀有气体原子以及氮双原子分子5到21次的谐波发射,着重讨论了激光功率密度、激光偏振、气体密度、共焦参数、介质本身以及相位失配对高次谐波转换效率的影响。

In addition, there is a different grape in the useful material is resveratrol, it is also a strong antioxidant, in grape juice and wine in a lot more to save.

此外,在葡萄中还有一种与众不同的有益物质就是白藜芦醇,它也是一种强抗氧化剂,在葡萄汁和葡萄酒中多得以大量保存。

Results indicated that pesticides show different variability in certain extent in relative response between different matrixes. Certain pesticides are matrix-dependent such as chlorothalonil, paraoxon, deltamethrin, methamidophos, acephate etc, among them, chlorothalonil have better relative response in acidic matrixes (as orange, tomato, grape, kiwi fruit) but have serious suppression in scallion, onion, garlic, leek, lotus root etc.

结果表明,各农药相对响应值具有不同程度差异,个别农药显示了较强的基质依赖特点(如百菌清、对氧磷、溴氰菊酯、甲胺磷、乙酰甲胺磷);其中百菌清在酸性基质橙子、番茄、葡萄、猕猴桃、蘑菇中稳定,其基质对百菌清起到了保护性作用,且能够抑制或减少溴氰异构体2向异构体1的转化;而在大葱、洋葱、蒜、藕、梨等基质中存在显著的降解或抑制作用。

There were a great deal of kinds of the grass with high quality and quantity fed to fish To determine the best symbiosis ecosystem of fish and grass on a closed system circulated yearly, several cold and warm grass was selected to analyse the adaptability and nutrition absorbed. It indicted that Lolium multiform Lam. and lemarthria compressa were the best option due to high adaptability of wetness, high coarse protein, fat and fibre and so on in the leaf, high biomass, high bio-filtration effect of N and P, adaption to the low or high temperature, resist to the plant diseases and insect pests, and the food of fish whose forage was grass.

鱼用优质高产牧草的种类繁多,为确定最佳的鱼草共生周年循环系统,本文选择几种冷季牧草和暖季牧草进行生长适应性与营养吸收研究,分析表明,多花黑麦草和扁穗牛鞭草是最佳的冷季牧草和暖季牧草,它们耐水性强,叶片中所含的粗蛋白、粗脂肪、粗纤维等化学成分高,植株的生物量也高,生物过滤养殖废水中的氮和磷效果好,而且可以适应外界环境的低温或高温,抵抗病虫侵害,同时为草食性鱼类喜欢食用。

Under the condition of irrigation, the length of guard cells in wheat flag leaf were shorter relatively, the range of their distribution was more centralized; in the dryland the length of guard cells in wheat flag leaf w...

在灌溉条件下,旗叶保卫细胞相对较短,分布范围较集中,在旱地中,旗叶保卫细胞相对较长,分布范围也较集中。在水地和旱地中,小麦旗叶保卫细胞长度分布相同者一般为耐旱性较强的品种。反之,则为耐旱性较差的品种。

The hydrolysates from oat xylan using Xyn Ⅰ Xyn Ⅱ and their mixture for hydrolysis were analysed by HPLC. It was showed that Xyn Ⅰ hydrolyzed mainly the unsubstituted regions of oat xylan, and hydrolytes were high xylooligosaccharides; whereas Xyn Ⅱ exhibited greater catalytic versatility than Xyn Ⅰ and were able to attack substituted regions of the polysaccharide and showed greater activity to low xylooligosaccharides than Xyn Ⅰ to give xylobiose as the main hydrolysate. The purified xylanases were acidic enzymes.

以纯化酶组分及其混合物水解燕麦木聚糖,采用高效液相色谱分析相应的水解产物,结果表明,Xyn Ⅰ降解燕麦木聚糖时,主要降解作用发生在底物中没有取代基的区域,水解产物的聚合度较高;Xyn Ⅱ对底物具有更强的适应性,能降解底物中有取代基的区域,相对Xyn Ⅰ酶组分,Xyn Ⅱ酶组分对低聚合度的木聚糖的活性更高,木二糖为主要降解产物。

1 The expression of Bax began in the late proliferative phase, the highest level in the involuting phase.

TGFβ1在增生期血管瘤组织中表达较弱,阳性表达率43.75%,退化期血管瘤组织中表达强,阳性表达率83.33%,两组比较有显著性差异,p<0.01。

Objective In order to study the testing numerical value of urine iodine and hair iodine is stable or not.

广告载入中。。。广告载入中。。。张春之,吴小科,凌志强,邓兰,陆罗萍,姚敏,张梅亚目的探讨尿碘和发碘测定值的稳定性。

The forming process for the high-strength, steel-base modified polyformaldehyde composite material in five-laver structure is to melt modified polyformaldehyde by heating and roll to make the melt polyformaldehyde permeate into the gaps gaps between the large-grained spherical copper powder and screw copper nails.

四层结构的钢基铜塑复合材料的成型过程,是将改性聚甲醛加热熔化,经轧制,使熔融的聚甲醛渗透到大颗粒球形铜粉的间隙中,解决了三层材料复合过程中,熔融的聚甲醛水平流动性强过垂直方向的渗透性,造成了结合强度低的缺陷,使聚甲醛层与铜粉及基体结合更牢固,提高了其承载和抗剪切的能力。

The forming process for the high-strength, steel-base modified polyformaldehyde composite material in five-layer structure is to melt modified polyformaldehyde by heating and roll to make the melt polyformaldehyde permeate into the gaps between the large-grained spherical copper powder and screw copper nails.

五层结构的高强度钢基改性聚甲醛复合材料的成型过程,是将改性聚甲醛加热熔化,经轧制,使熔融的聚甲醛渗透到大颗粒球形铜粉的间隙中,解决了三层材料复合过程中,熔融的聚甲醛水平流动性远强过垂直方向的渗透性,造成了结合强度低的缺陷,使聚甲醛层与铜粉、螺旋铜钉及基体结合更牢固,提高了其承载和抗剪切的能力。

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It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发,分析对称连杆曲线上鲍尔点的产生条件,提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品,年生产总值3000万美元,产品价廉物美、选料上乘、质量保证,深受国内外客户的青睐

The eˉtiology of hemospermia is complicate,but almost of hemospermia are benign.

血精的原因很,以良性病变为主。