Liposomes were prepared by thin film evaporation and ultrasonic technique, and single factor test was adopted to study the effects of several factors in preparation on encapsulation efficiency. 方法:采用薄膜超声分散法制备,并以包封率为指标采用正交设计法优化川芎嗪口服固体脂质纳米粒的制备工艺。
The effects of feed temperature, flow rate and feed concentration on temperature distribution, concentration distribution, distillate concentration, evaporation rate and mean separation factor were reviewed in this paper. 同时对进料温度、进料组成和进料流量对液膜温度、浓度分布、蒸馏速率、馏出液组成以及分离因数的影响进行了考察,并分析了原因。
Evaporation rate of solvent is the major kinetic factor affecting the nodule formation; for the formation of dense membranes, with the increase of evaporation rate, average diameters of the nodules tend to decrease. 溶剂脱离成膜体系的速率是影响球粒状结构形成的主要动力学因素,对于致密膜,溶剂脱离体系速率越快,球粒的直径越小。
With a project example, calculates the latent heat by pool water evaporation, and concludes that the pool water evaporation is an important factor influencing air conditioning load. 结合工程实例,计算了池水蒸发潜热量,得出池水蒸发潜热负荷是空调负荷的一个重要影响因素。
Due to consideration of multiple factors instead of single factor, the precision of calculation of the phreatic evaporation is higher than that of single factor method. 由于考虑因素更多,故比以往用单一值计算潜水蒸发量的精度更高。
The technical and structure parameters are analyzed with respect to the evaporation rate and separation factor. 并结合蒸发速率和分离效率这两个评价分子蒸馏效果的重要指标,对刮膜分子蒸馏器工艺参数与结构参数进行了分析与讨论。
While the working performance of evaporation source in the equipment is an vital factor which affects the quality of coating film directly, a further exploration for the phenomenon is needed. 设备中阴极电弧蒸发源工作性能的好坏直接影响到产品质量。
Precipitation is regard as the most direct factor of outer climate to bring expansive soil slope into disaster and evaporation effect is one of important premise, while fissure due to evaporation is the internal factor for disaster. 认为降雨是引起膨胀土边坡灾变的最直接的外在气候因素,而蒸发效应是灾变发生的一个重要前提条件,由于蒸发所产生的土体裂隙是灾变发生的内在原因;
Mass loss due to evaporation in summer does not seem to be important in the annual mass balance but it seems to be an important factor in determining the glacier distribution in this area. 在夏季,尽管平均日总量为0.013g/cm~2的蒸发在年物质平衡中所造成的物质亏损似乎是不太重要的,然而它却是制约该区冰川分布的重要因子。
Due to the less rainfall and it's big annual and interannual variability, the windy spring and the high evaporation rate, the drought disaster is seriously in spring, which has become a main factor limits the agriculture production of the region. 从气候条件来看,由于本区降水量少,年变化和季节变化大,春季多大风,蒸发强烈,春旱十分严重,已成为制约本区农业生产的主要因素。
The evaporation efficiency has a direct effect on manufacturing energy consumption and cost of aluminum oxide. The scale formation is main factor to influence improvement of evaporation efficiency. 蒸发效率的高低直接影响氧化铝生产能耗及成本,结疤是影响蒸发效率提高的主要因素。
Based on standard dynamic analysis and the simulation of new water level model, this paper indicates that the changing mass storage in evaporation area is also an important factor of false water level. 基于准动态计算分析和蒸发区完整模型的动态仿真试验,本文确定蒸发区循环管路贮质量变化也是引起虚假水位的重要影响因素。
Evaporation from sea surface is one of the important approaches of mutual relationship between sea and the atmosphere, it is also an important factor of heat energy exchange on the earth. 海面蒸发是海气相互作用的重要途径之一,是地球上热能交换的重要因子,海面蒸发量的测量对海气通量交换的研究具有十分重要的意义;
Craft calculations of parallel-flow adding material process of salt solution of multiple grade evaporation involves in more calculation item with uncertain factor. 食盐水溶液多效蒸发平流加料流程的工艺计算由于涉及较多的计算项目和不定因素而比较困难。
Field evaporation is the main factor in relation to drought. 农田蒸散是形成土壤干旱的主要因素。
With raining model and evaporation model, unsaturated-unsteady seepage analysis was used to calculate pore pressure of the case slope, and Bishop Equilibrium balance method with total cohesion was used to calculate the stability factor of the case slope. 采用蒸发和降雨模型对边坡进行非饱和-非稳定渗流分析,用总凝聚力表示的Bishop极限平衡法计算边坡安全系数。
Slope stability analysis of the natural slope showed that heavy rainfall infiltration could decrease the factor of safety dramatically while evaporation could increase the factor of safety slowly. 通过对边坡开挖之前的自然边坡的稳定性分析,降雨入渗可以使边坡土体的安全系数急剧降低而蒸发则可以使边坡土体的安全系数缓慢升高。
Annual evaporation was major climatic factors affecting on the height of Artemisia scoparia.6.The annual mean evaporation was a main factor to impact the cover degree of plant populations of meadow grassland in July and August, and there was a negative correlation between them ( P0.01). 6年蒸发量是影响青海湖北岸草甸化草原植物7、8月份覆盖度的主要因子,呈负相关关系(P0.01)。
From the point of the season, wind speed and evaporation for spring, autumn ETo major effect factor, temperature, wind speed for summer ETo major effect factor, wind speed for winter ETo major effect factor. 从季节上看,风速、蒸发量为春季、秋季ET0主要影响因素,温度、风速为夏季ETo主要影响因素,冬季风速为主要影响因素。
In the present thesis, the low-frequency combustion instability in liquid rocket engine is investigated with numerical simulations, theoretical analyses and experimental studies. The dynamic response characteristics of droplet evaporation to pressure oscillation are considered as the key exciting factor for low-frequency combustion instability. 本文基于推进剂液滴蒸发过程对压力振荡的动态响应特性可能是液体火箭发动机低频不稳定燃烧的主要激励因素,对液体火箭发动机的低频不稳定燃烧进行了数值仿真、理论分析和试验研究。
The daily variation, seasonal variation and year variation of dewfall and the soil evaporation in semi-arid were studied, the impact factor of dewfall and soil evaporation was analyzed. 研究了半干旱区陆面降露水和土壤蒸发的日变化、季节变化和年变化,并且初步分析了降露水和土壤蒸发的影响因子。
Xinjiang is located in the middle of Euro-Asia continent with rare precipitation, strong evaporation and arid climate, so, shortage water is the important factor of affecting the local ecological balance and restricting the sustainable economic development. 新疆深居中纬度欧亚大陆腹地,降水稀少,蒸发强烈,气候干燥,水资源短缺是影响新疆生态平衡和制约国民经济持续稳定发展的重要因素。