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Petrologic types for the 23 chondrites are ascertained mainly based on the property of chon-drules and matrix structures of the chondrites, as well as the composition of olivines, structures of pyroxenes and characteristics of feldspars, and so on.

陨石岩石类型的确定，主要根据陨石中球粒及基质的特征，参考其它标志，如橄榄石成分、辉石的结构、长石的特征等进行分类，效果较好。

The effect of preparation method of Al-pillared montmorillonite agent, montmorillonite suspending concentration, Al-pillared agent dosage, pillaring reacting temperature, pillaring reacting time are investigated, and the best craft condition has been ascertained. Then the capability has compared with the nature montmorillonite.and Al-pillared montmorillonite.

研究探讨了铝交联剂制备方法、蒙脱石悬浊液浓度、铝交联剂的用量、交联反应温度、交联反应时间等各因素对其制备的影响规律，确定了铝交联改性的最佳工艺条件，进行了与天然蒙脱石和改性累托石的性能比较。

The optimizations of processing parameters for clarification juice of balsam pear and Platycodon grandiflorum were ascertained.

以苦瓜、桔梗为实验原料，研究苦瓜桔梗复合饮料的加工工艺。

On the basis of analysis, the prestress number of cable is ascertained.

对它进行了非线性静力分析，在分析的基础上，合理确定了拉索的预应力值。

One of them has been identified to be Stemona sessilifolia, and the other not ascertained yet.

其氫碘酸鹽的熔點爲252°。又從母液中分得一種氫碘酸鹽，熔點218°。

Variabilis natural type; applied the theory of numerical taxology and cluster analysis method, classified the Q. variabilis of Qinba and Huanglong mountain; ascertained the standard and method of Q. variabilis plus trees selection about 30 ages in Shaanxi province different areas and selected 49 plus trees that were suitable to different areas; used isoenzyme analysis ,through the detection enzyme system of POD,GDH,EST and ADH ect, researched the genetic variation level of Q. variabilis natural populations and heredity construction of different Q. variabilis natural type .The result showed:(1) Q.

本文通过对栓皮栎地理分布的研究，确定了研究栓皮栎天然类型的地理区域；应用数值分类学原理，采用聚类分析方法，对秦巴山区和黄龙山区的栓皮栎天然类型进行划分；确定了陕西省不同地区30年左右栓皮栎优树选择的标准和方法，并选出了适宜不同地区生长的优树49株；采用同工酶技术，通过对POD、GDH、EST、ADH等4个酶系统的检测，研究栓皮栎天然群体遗传变异水平和不同栓皮栎天然类型的遗传结构。

The studies was proceeded on the the supercritical CO2 extraction technique of rotenone from Tephrosia vogelii. The extraction influences of technology conditions were systematically groped, The research results were listed as follows:1 The analysis method applied in this paper has been proved to be suitable to technology research of the studies on the SC-CO: extraction technique of rotenone from Tephrosia vogelii. 3 indexes, extraction ratio of rotenone. extraction ratio of total compounds and rotenone content percent in total compounds weight, were carried out with HPLC quantitatively determination combined with the sample weight loss after extraction. With these 3 indexes. The extraction influences of technology conditions were evaluated by synthesis. Then the best technology conditions were ascertained for different extraction aims.2 The pretreatment of rough material should be needed before extraction. Comminuting the material to 0.28mm size is most fit to SC-CO: extraction.3 Firstly static extracting 20 min then turn to dynamic doing is the better extraction mode than other ones.4 The orthogonal experiment was conduct with 3 factors and 5 levers.

本论文通过对非洲山毛豆SC-CO_2萃取中影响萃取效果的工艺条件的研究，初步得出如下结果：(1)本论文中所采用的萃取效果评价方法适宜于非洲山毛豆中鱼藤酮的超临界流体萃取技术研究，该方法具体为：HPLC定量分析非洲山毛豆SC-CO_2萃取物中的鱼藤酮含量，再结合萃取前后处理样品的重量损失，得出鱼藤酮萃取率、萃取所得粗物质萃取率和粗物质中鱼藤酮含量三个参数，以此三个指标综合评价萃取条件对萃取效果的影响；(2)通过对原料粒度对萃取效果影响的研究，结果表明SC-CO_2萃取非洲山毛豆复叶中的鱼藤酮，原料粉碎成30目粒度叶粉时萃取效果较好；(3)通过对萃取方式与萃取效果之间关系的研究，结果表明SC-CO_2萃取非洲山毛豆中鱼藤酮应采用先静态后动态的萃取方式，静态萃取时间为20min；(4)通过温度、压力和CO_2流量三因素五水平的正交试验，结果表明温度是最主要的影响因素，压力因素对鱼藤酮萃取率的影响程度高于CO_2流量，而对于粗物质萃取率和粗物质中鱼藤酮含量CO_2流量因素高于压力。

And β-sitosterol is detected for the first time in studying of Tilia mongolica wood. By GC-MS techniques, it is ascertained that forty-five kinds of chemical components were in the leaves of Tilia mongolica and they accounted for over 80.35 percent of total volatile oil.

通过对蒙椴树叶成分利用气相色谱-质谱连用技术分析，确定出其中的45种化学成分，并通过标准峰面积法确定了它们的相对含量，已鉴定成分占总油状组分的80.35%，主要成分以脂肪酸、烷烃、醇类物质为主。

Andβ-sitosterol is detected for the first time in studying of Tilia mongolica wood.By GC-MS techniques,it is ascertained that forty-five kinds of chemical components were in the leaves of Tilia mongolica and they accounted for over 80.35percent of total volatil eoil.

通过对蒙椴树叶成分利用气相色谱-质谱连用技术分析，确定出其中的45种化学成分，并通过标准峰面积法确定了它们的相对含量，已鉴定成分占总油状组分的80.35%，主要成分以脂肪酸、烷烃、醇类物质为主。

Optimization of the medium was carried out on the level of flask, corncob, tryptone, Mg2+ and Hisdidane were selected for the production of xylanase. Effects of other factors, such as Tween-80 on the production of xylanase were also ascertained. After the orthonagol design, the optimal medium for the production of xylanase on the level of flask was established.

在摇瓶水平上进行了培养基筛选实验，筛选到适合于木聚糖酶发酵主要碳源—玉米芯、主要氮源—蛋白胨、无机盐离子—Mg~(2+)、氨基酸—His，还进行了表面活性剂Tween—80的添加量等因素试验。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。