查询词典 seawater

In this paper, we studied M. meretrix ferritin, cathepsin B and caspase genes, which are involved in clam larval shell formation, nutrition, metabolism and apoptosis, respectively. We have cloned the three genes, investigated the temporal and spatial expression profile both at gene and protein level in trochophore (L1), D-veliger (L2), pediveliger (L3) and postlarvae (L4). The potential roles of these proteins were analyzed with specific inhibitors during larval development. Firstly, embryos were found developed into trochophore-like larvae with no shell if cultured at gastrula stage in artificial seawater without iron. Shell-like structures were formed only in the presence of iron. The larvae which had been transferred at L1 stage into ASW developed normal shell. This indicated that iron and iron associated protein are important for larval shell formation. The EST sequence which is homologous with ferritin, which is a principal iron metabolic protein, was selected from the M. meretrix cDNA library. The full-length of ferritin subunit cDNA was cloned by RACE. The results of real-time PCR revealed that the MmeFer mRNA expression changed before and after the larval shell formation.

本论文以文蛤幼虫为研究对象，分别对文蛤幼虫发育过程中贝壳形成相关的铁蛋白、营养及变态相关的组织蛋白酶B及变态过程中细胞凋亡相关的caspase三个基因进行了克隆，分析了基因及编码蛋白在担轮幼虫期(L1)、D形幼虫期(L2)、壳顶幼虫期(L3)和稚贝期(L4)的时空表达特征，解析了其可能的功能，并研究了相应酶类的特异性抑制剂作用对幼虫发育过程的影响，进行了目标蛋白的功能验证，详述如下：研究结果显示，在文蛤胚胎发育到原肠胚时放入不含铁离子的人工海水中培养，发育成无壳的畸形，随着人工海水中铁离子添加浓度的升高，幼虫长出壳状组织接近正常状态；而发育到L1期幼虫放入不含铁离子的人工海水中培养却可以发育出正常的壳，推测铁和铁代谢相关蛋白在幼虫贝壳初始形成有重要的作用。

Though seawater contains only three parts per billion of uranium, mostly in the form of uranyl tricarbonate, the element can be sucked out of it by ion exchange.

虽然铀在海洋中的含量只有十亿分之三，但其中大部分都以三碳酸铀的形式存在，使得铀元素可以通过离子交换吸出。

The salt concentration in the liquid water of Lake Vida is found to be a great deal higher than that of seawater.

液态水中盐的浓度被发现远高于其他海水的含量

After reaching of the setting of vacuum, the seawater is heated with jacket water.

待真空度达到规定值后，用缸套水加热海水。

To test stainless steel wire rope with different compositions immerged in seawater and to analyze and discuss anti-corrosion property.

对不同成分的不锈钢丝绳进行海水全浸试验，对耐腐蚀性能进行分析和讨论。

Professor Wootton says biological factors were missing from previous models of ocean climate systems - and that life in the ocean, or in this case on the ocean edge, can also affect seawater pH.

伍顿教授称，生物学的因素和海洋中的生命都比以前海洋气候系统模型中的少，如果这种情况发生在海边，也会影响海水的PH值。

Under laboratory conditions, this paper studied the adsorption of different concentration 40, 400 and 4 000 μgL^(-1 polycyclic aromatic hydrocarbons including low molecular weight acenaphthylene, phenathrene and chrysene and high molecular weight benzo perylene in seawater by the leaf litters of Kandelia candel and Avicennia marina at different decomposition status.

在实验室条件下，研究了海水中多环芳烃（含低分子量PAHs苊、菲和以及高分子量PAHs苯并芘）浓度分别为40、400和4000μgL^(-1)时，红树植物秋茄和白骨壤不同分解状态落叶碎屑对PAHs的吸附作用。

In seawater and fresh water, aluminum alloy was not corroded as the all protection of alclad. In salt lake, the alclad on LC4 aluminum alloy remaindered for half a year, and used up for one year. The base of LC4 aluminum alloy was corroded seriously.

在海水和淡水中，包铝层可以对铝合金基材起到完全的保护作用，使基材免遭腐蚀；而在盐湖水中，半年时LC4铝合金表面尚有包铝存在，而一年时LC4铝合金表面包铝已完全消耗至尽，LC4的基体发生严重腐蚀。

According to SEM observation, the corrosion regulation of LC4 aluminum alloy with alclad in China water system and the protection of alclad on LC4 were studied. The corrosion experiment was done in seawater of Qingdao, Zhoushan, Xiamen, salt lake with high salinity of Geermu, and fresh water of Changjiang River in Hankou.

利用带包铝LC4铝合金在东部地区海水、西部地区盐湖水、中部地区淡水中的暴露腐蚀试验，对盐湖水中包铝对铝合金基体的保护作用行为进行了探讨，得到带有包铝的LC4铝合金在水系统中的腐蚀规律。

The mineralization temperature is in a range of 90℃~300℃, and the mineralization fluid is a combination of slightly acidic-slightly alkalic precipitations, seawater and magmatic water.

其成矿温度在90~300℃之间，成矿流体为低盐度的弱酸性－弱碱性大气降水、海水和岩浆水的混合溶液。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。