查询词典 sieve

The fundamental imaging features of osteosarcoma were showed bone destruction, periosteal reaction, neoplastic bone and soft-tissue mass. Among 49 cases examined by radiography, osteoblastic pattern sarcoma was found in 19 cases, osteolytic pattern sarcoma was found in 13 cases and mixed pattern sarcoma was found in 17 cases. The detection rates of bone destruction, periosteal reaction, soft-tissue mass, neoplastic bone and Codman triangle by radiography were respectively 61.2%, 95.9%, 71.4%, 73.5%and 27.7%. All 10 cases with CT scan were showed bone destruction, soft - tissue mass and neoplastic bone. The detection rates of periosteal reaction,憇ieve sign挶 and Codman triangle with CT scan were respectively 90%, 90% and 11%. The tiny neoplastic bone and"sieve sign"were showed sensitively by CT, but Codman triangle was showed by radiography superior to CT.32 cases with MRI scan presented the normal marrow was replaced by the tumor, which was showed low to intermediate signal intensity on T1-weighted images and promiscuity signal intensity on T2-weighted images. 7 cases presented hemorrhage and 24 cases presented necrosis.

骨肉瘤基本影像表现为骨质破坏、骨膜反应、瘤骨和软组织肿块。49例X线表现为成骨型19例，溶骨型13例，混合型17例；X线对骨质破坏、骨膜反应、软组织肿块、瘤骨和Codman三角的检出率分别为61.2%、95.9%、71.4%、73.5%和27.7%；10例CT表现均可见骨质破坏、软组织肿块及瘤骨，CT对骨膜反应、筛孔征和Codman三角的检出率为90%、90%和11%；CT对显示细小肿瘤骨和筛孔征最敏感，但对Codman三角的显示不如X线平片；32例MRI表现为骨髓腔内正常的骨髓高信号被肿瘤信号所取代，T1WI呈低～等信号，T2WI呈混杂信号，7例合并出血，24例中央坏死囊变，32例增强扫描均呈不均匀强化及瘤周可见水肿区。

Using W-HMS molecular sieve synthesized from the tungsten source of (NH4) 2WO4 as catalyst and hydrogen peroxide as oxidant, the effects of reaction time, temperature, dosage of catalyst, solvent type and volume, and oxidant concentration on the catalytic oxidation of cyclopentene to glutaraldehyde were investigated.

对以(NH4)2WO4为钨源合成的W-HMS分子筛为催化剂，过氧化氢为氧化剂，环戊烯合成戊二醛的多相催化反应进行了研究，考察反应时间、反应温度、催化剂用量、溶剂种类和用量以及氧化剂浓度等因素对戊二醛收率的影响。

Experimental study on enhanced deaquation process for extra-heavy crude oil using dehydrant ;2. DMF refining by molecular sieve as dehydrant ;3. Hybrid catalysts composed of JC207 methanol synthesized catalyst and dehydrant (HZSM-5 zeolite or γ-Al2O3) were prepared for the synthesis of dimethyl ether.

采用甲醇合成催化剂JC207和固体酸脱水剂(HZSM-5分子筛或γ-Al2O3)混合制得合成二甲醚双功能催化剂，并在固定床反应装置中进行了活性评价，考察了固体酸脱水剂的酸性对一步法合成二甲醚的影响。

We used phospholipid, Epikuron 200, and cholesterol as material to prepare liposome formulation, and discuss the effect of liposome formulation which contain phospholipid and cholesterol or the mix of ionic surfactants such as stearylamine, dicetyl phosphate and nonionic surfactant such as Tween 80. For the three group that physical properties of drug entrapment efficiency, particle size and stability of formulation on day 0, 14, 21 and 30 were respectively compared, and further, we were sieve out optimization of formulation.

我们利用Epikuron 200之磷脂质，以及胆固醇作为制备微脂粒处方之材料，并探讨处方不加或分别加入表面修饰剂stearylaminem与dicetyl phosphate以及非离子界面活性剂Tween 80对处方之影响，且比较此三组微脂粒的物理性质，包含包埋率、粒径大小以及处方在第0、14、21、30天之安定性的变化，进一步筛选出理想之处方。

In this study, on the basis of the grain size analysis using the laser diffract instrument and sieve-pipette methods for several model sediments, the two sets of grain size parameters are compared and the differences between the two methods are analyzed.

为了解激光粒度仪法和传统的筛析－沉降法在模型沙粒度测量方面的差异，用这两种方法对几种模型沙样品分别进行了粒度分析。

Key words : grain size analysis ; laser diffract instrument ; sieve-pipette method ; model sediment

对不同的粒级组分进行了激光法和筛析-沉降法的回归分析，粗颗粒物质相关性好，可以进行数据间的转换。

In the second part, the supported mesoporous sieve solid base KNO_3/MCM-48 and KAc/MCM-48 were prepared. And it was the first time that KNO3/MCM-48 and KAc/MCM-48 were used as catalysts for the synthesis of dipropyl carbonate by transesterification of propanol and dimethyl carbonate.

第二部分研究了负载型KNO_3/MCM-48和KAc/MCM-48固体碱的的制备，并首次将这类催化剂应用到丙醇和碳酸二甲酯酯交换法合成碳酸二丙酯的反应中。

Anhydrous magnesium chloride may be prepared from materials containing magnesium chloride such as magnesium chloride hydrate, carnallite or bittern by different dehydrating methods of organic solvent distillation or molecular sieve absorption, gas protective heating, discomposing the MgCl2-NH3 complex that can be composed from high boiling-point polar-solvent system...

无水氯化镁制备技术经历几十年不断的探索，取得了一些进步，但彻底改变耗能高、污染腐蚀严重、流程复杂的工艺过程，开发流程简单、低污染腐蚀、低成本的绿色工艺仍然需要更深入的研究。

The synthesis methods of ethyl lactate catalyzed by P-toluene sulfonic acid, cationic exchange resin, ferric chloride hexahydrate, stannous chloride, Aluminium chloride, modified zirconium oxid, ferric-potassium vitriol, ammonium ferric sulfate dodecahydrate, rave earth sulfate, sodium bisulfate monohydrate, complex solid superacid, heteropoly acid, molecular sieve, ionic liquid and lipase etal.

评述了对甲苯磺酸，阳离子交换树脂，六水三氧化铁，氯化亚锡，三氯化铭，改性氧化锆，铁钾矾，十二水合硫酸铁铵，稀土硫酸盐，一水硫酸氢钠，复合固体超强酸，杂多酸，分子筛，离子液体和脂肪酶等催化剂催化合成乳酸乙酯的合成方法。

After improvement method of sieving. It can proceed the sieving to the single species pesticide liquid, and also fit to multi-specieses pesticide liquid or unknown pesticide liquid, the ratio of volume does not completely together whole 10. Compare with the former, the later has some advantages like easy to operate, economic, easy to control in operating temperature (30℃), breadth application and sieve speed quick (10 min/each), etc. It is very suitable for pesticide factory to produce emulsifiable solution.

改进后的筛选方法，二者的体积比则不凑整10，既可对单品种农药液进行筛选，也可对多品种农药液或未知农药液进行筛选，与前者相比，后者具有操作方法简便、经济、操作温度易控制(30℃)、应用范围宽、筛选速度快（10min/个）等优点，非常适合农药厂家在生产乳油时应用。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。