稳定性

The cyanin of Acer ginnala had low light and heat stability.It could hold the cyanin stability under low temperature and dark condition.

茶条槭的花色素苷表现出光、热稳定性差的明显特征，低温和黑暗条件能较好地保持花色素苷的稳定性。

In this paper,we compared the photodegradation efficiency of nano-titania films by using dichloroacetic acid,rhodamine B and methyl orange as the photocatalytic referents and the ultraviolet lamp as the source light to generate the photocatalytic reaction.

针对纳米氧化钛光催化性能研究中缺乏统一有效表征标准的现状，比较了二氯乙酸、罗丹明B和甲基橙三种光催化活性评价物的热稳定性和对紫外光的稳定性，并以氧化钛纳米薄膜为光催化剂，研究了三种评价物的光催化降解效率表征，以及酸碱度、通氧条件等因素对评价物在光催化活性表征中的影响及其机理，归纳了三种评价物对于纳米氧化钛光催化活性表征的优缺点。

During the process of the fore mentioned analyses, some tentative works as follows were done.(1)On the basis of the fundamental of spatial analytic geometry, the basic method for displaceable block searching was put forward and the relevant program was written. With this program one can easily search out all the displaceable blocks and omitting of blocks, which is very common in searching blocks manually, can be avoided.(2)The coefficient of stability of blocks with failure mode II-2(that is, sliding on a single sliding surface, but confined by near intersecting line )was deduced.(3)The multi-cavern effect of Laxiwa underground caverns was studied on the assumption that all of the caverns were full face tunneled at the same time.(4)The stability classification scheme of rock mass surrounding large scale underground caverns was established. In addition to inherit the merits of the method of engineering geological

在完成上述工作的过程中，本论文主要在以下几个方面进行了一些探索：①基于空间解析几何原理，提出了块体搜索的基本思路并编制出相应的程序，基本实现了块体搜索的自动化，既大大缩短了块体搜索时间，又能防止因人工搜索引起的遗漏；②推导出Ⅱ-2型(单滑面滑动，但受侧限面约束)块体的稳定性系数计算公式；③以数值模拟方法论证了拉西瓦地下厂房洞室群全断面一次开挖时群洞效应的具体特点；④以岩体质量、开挖效应、群洞效应和次生灾害效应为评价指标，建立了&大型地下洞室群围岩稳定性分类&方案；该方案既继承了水电行业规范&围岩工程地质分类&法的优点，又综合考虑了大型地下洞室群的工程特点。

The results of physicochemical tests showed that the pigment was a kind of water dissolvable pigment with heat stability.

榛子壳棕色素为水溶性色素，具有良好的耐热性；强光长时间照射会影响色素的稳定性；在pH值4~12范围内，色素稳定性良好；Na，K，Ca(上标 2+)，Al(上标 3+)，Mg(上标 2+)对色素无影响，但Fe(上标 3+)，Cu(上标 2+)，Zn(上标 2+)对其影响较大；色素对常见的食品添加剂稳定，但柠檬酸使其发生轻微褪色。

In this paper,we establish Lyapunov Direct and Feedback Linearization two methods to analyze stability of Duffing systems which belongs to nonlinear systems.

首先，本文对给定的模型进行适当的变形后，构造出相应的Lyapunov函数，通过确定一定的条件，使其满足Lyapunov第二方法渐近稳定性定理，从而使系统具有稳定性。

Specifically, itcontains 8 chapters.In chapter 1, the formation, structures, properties and the futureprospect of liposome were thoroughly reviewed;In chapter 2, the stibility and permeability of phopholipid -eleostericacid liposome were studied together with the effect of polymerizationof eleostearic acid. This membrane system was very sensitive to 〓,the effect of 〓 was clarified to increase the aggregation/fusion ofliposomes and made the permeability of mixed liposomes much higher;In chapter 3, two polymerizable conjugated diyne bolaamphiphiles were synthesized. They could form very stable mixed liposome, andthe diyne could be polymerized by UV light in bilayer liposomes, as aresult, the stability of mixed liposome against solvent or surfactantafter polymerization were enhanced. In chapter 4, two kinds of amphiphilic amino acids were synthesized andstable liposomes were formed therefrom After the condensationpolymerization of amino acid in bilayer liposomes, stable polypeptide liposomes were obtained, which had lower phase transition temperatureand higher permeability.In chapter 5, four kinds of glycolipids were synthesized and theiraggregation behavior in water was comparied. When incorporated intophospholipid bilayer membranes, they could increase the phase transitiontemperatures and inhibit the aggregation and fusion of mixedliposomesat lower temperature.In chapter 6 and 7, three kinds of steroidal bolaamphiphiles withdifferent chain lengths were synthesized. Incorporation of steroidalmoiety to the center of lipid bilayer membrane obviously increased themobility of lipid membrane and shifted Tc to lower temperature side incomparasion with cholesterol. The bolaamphiphile which was shorter thanthe hosted lipid bilayer membrane thickness influenced the lipid packingmore obviously.

全文共分8章：第一章对脂质体的形成、结构、性质及展望进行了较为详细的文献综述；第二章研究了磷脂-桐酸脂质体的稳定性，通透能力及桐酸的聚合对这些性质的影响；磷脂-桐酸混合脂质体为一类对〓灵敏的脂质体，〓的作用首先是使脂质体集聚然后使脂质体融合，并加速内包荧光物的释放；第三章通过合成两种可聚合共轭双炔双极性双亲分子DDCA，DDOL，研究了共双炔分子在双分子层脂质体膜上的聚合及对脂质体性质的影响，聚合可以提高脂质体相对于溶剂及表面活性剂的稳定性；第四章合成了两类氨基酸为极性基团的双亲分子，它们均可以在超声下形成稳定的脂质体结构；氨基酸基团可以在脂质体上进行缩聚反应，若聚合后脂质体表面仍有足够的亲水能力，则可得到稳定的多肽型脂质体；聚合后脂质体的相变温度降低，通透能力增加；第五章合成了四种亲水基团为单糖基的双亲分子GL-l，GL-2，GL-3， GL-4，研究了它们在水中的分散情况、集合体形态与分子结构的关系；在DMPC双分子层膜中加入糖脂分子可以使脂质体的相变温度提高，阻止脂质体在低温放置时的集聚与融合；第六章-第七章合成了三种不同碳链长度的双极性含胆甾环双亲分子 CL-1，CL-2，CL-3；它们可以象胆固醇一样与磷脂混合形成稳定脂质体，胆甾环基团位于脂质体双分子层膜的中间；与胆固醇的作用相反，它们可以增加磷脂双分子层膜的流动性，降低混合脂质体的相变温度；三种分子的作用与其碳链长度和磷脂双分子层膜的厚度有关，比膜厚度短的分子影响最大。

The characteristics of this emulsifiable concentrate including emulsion dispersion, emulsion stability, cold storage and thermal storage stability was qualified the requirement of the national standards.

该乳油的乳化分散性、乳液稳定性和冷、热贮稳定性均符合国家标准。

The result of this study showed that the content of moisture, sucrose, milk powder and the difference of pH affected the stability of the fermentable rice milk in different levels.

对稳定性的研究表明：不同的含水量，不同的蔗糖、奶粉的添加量及不同的pH值对产品的稳定性有不同程度的影响。

The strain was inoculated to fermentive medium (pH 7.0) at the amount of 10 percent, cultured for 84 hours at 28℃ with shaking. Its antagonistic activity reached the highest level and high thermostability, pH stability and resistance to proteinase K were achieved.

以10%的接种量将该菌接种到初始pH7.0的发酵培养基中，28℃旋转培养，发酵液在84h时抗菌活性达到最高，且具有较好的热稳定性和pH稳定性，对蛋白酶K有一定的耐受性。

The PCBN cutting tool, with many advantages such as good wear resistance, thermal and chemical stability, low friction factor and so on, has incomparable superiority when hard machining ferreous materials, instead of grinding, is becoming a new kind of finish machining way.

PCBN刀具具有硬度高、耐磨性好、热稳定性和化学稳定性好，导热性良好以及摩擦系数低等优点，在硬态加工铁系材料时具有无可比拟的优越性，正逐步取代磨削加工而成为一种新的精加工途径。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。