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Animal growth and productivity is decreased, because SS inhibit the secretion of some hormones and digestive enzyme, such as GH, Pancreatic juice, Gastralgia, Pepsin, and inhibit gastrointestinal tract creepage.

生长抑素是通过抑制动物体内多种激素、消化酶(胃蛋白酶、胰液、胃酸等)的分泌和胃肠道的运动而抑制动物的生长的

In order to study the influence of nitric oxide and copper ion on marine algae growth,Skeletonema costatum and Gymnodinium sp.were incubated when adding different concentrations of NO and copper with different addition methods,and the preliminary functional mechanism was discussed.

为研究一氧化氮与金属铜对海洋微藻生长的影响,选用中肋骨条藻和裸甲藻(Gymnodinium sp。)进行了不同NO和Cu浓度、不同添加方式的室内培养实验,初步探讨了它们的作用机制。结果表明:一次性或每天两次加入不同浓度NO(10-5~10-10mol/L),对微藻的生长表现出不同程度的促进或抑制作用,呈&两面性&。

Inaddition to that,LFY has a second role in the activation of the floral homeotic genes that specify the identity of organs in the flower and is a key intergrator of the outputs of floral inductive pathways.DFL, a FLORICAULA/LEAFY homologous gene,which cloned from C.lavandulifolium,was a key gene of florescence for C.lavandulifolium.

LEAFY基因在植物成花过程中意义重大,它不仅决定着花由营养生长向生殖生长的转变,它还接连GA成花途径和长日途径的信号继而诱导花分生组织的转变,同时还是活化花器官基因的关键基因。

These are main problems of eutrophication.In this paper we selected alga that suits to grow under different concentration of nutrition, after selecting seed, domesticating, culturing alga purely in the lab, we gained Hydrodictyon reticulatum and microalga, most of which are Miorocystis and chlorella.

本文选取在不同营养水平条件下适合生长的藻类物种,在实验室进行选种、驯化和纯化培养,得到水网藻和微藻(主要为微囊藻Miorocystis、小球藻chlorella);以实验室培养的生长速度快、生产能力高的水网藻为原料,制备一系列环境友好性光敏物质——叶绿素及其衍生物,运用光敏氧化分光光度法测定活性氧(O_2~-,H_2O_2,·OH,和~1O_2),根据其光敏产生活性氧效率,进行光敏物质的筛选;选用叶绿素铜及其钠盐,以微藻为实验控制对象,以Cu~(2+)作培养对照,在相同光照、营养条件下进行控藻实验。

In the present study,we stress the distinction between the process of deposition dynamicsand the process growth kinetics for the understanding of the atomistic mechanisms inenergetic depositions.

局域范围内的&瞬时&沉积模拟结果显示:随着沉积原子初始能量的增加,载能原子可以改变薄膜生长的局域表面形貌,促进薄膜的层状生长。

The results indicate that different molecular weight of dextran could be obtained by direct fermentation,and the acid hydrolyzing in the old technology be avoided.The yield reached the maximum by controlling the pH value to be 8.0,and the inorganic salt could promote the growth of the Leuconostoc mesenteriodes with the effect of promotion being Mn2++Ca2+>Mn2+>Ca2+.

结果表明:通过定向发酵技术可得到符合要求的不同分子量的右旋糖酐,避免了老工艺中酸水解工艺;控制发酵培养基pH值为8.0,可使产率最大;无机盐离子Mn2+和Ca2+能促进L.M菌的生长,其促进菌生长的程度大小依次为:Mn2++Ca2+>Mn2+>Ca2+。

The leaf in the Karst area was isolateral and had closely arranged mesophyllous cells.

在显微结构方面:岩溶区生长的扇叶铁线蕨的叶片具有旱生植物叶片特点,即叶片为等面叶,叶肉细胞排列较为紧密以及叶片维管组织发达等:而非岩溶区生长的扇叶铁线蕨的叶片为异面叶,特点为叶肉细胞排列相对疏松,维管组织不发达。

The microbiotic soil crust could create the microenvironment that was suitable for plant growth on the abominable environmental condition and unstable soil.

在风蚀环境条件和不稳定的土壤条件下,生物结皮的出现可创造适合植物生长的微环境,为植物的生长提供了条件。

The results show that Cd2+ for Pistia stratiotes and Myriophyllum spicatum L root-like effects of microbial flora with the microorganism or physiological groups, training time and Cd2+ concentration varies; Micro-organisms under Cd2+ stress would have two distinct effects: First, the growth of micro-organisms are not suited to reduce the number or extinction; Second, the growth of micro-organisms adapt to an increase in the number or the accumulation.

结果表明,Cd2+对大薸和穗状狐尾藻根系微生物的影响随微生物区系或生理类群、培养时间和 Cd2+浓度的不同而不同;受重金属镉胁迫后微生物会产生两个明显的效应:一是不适应生长的微生物数量会减少或灭绝;二是适应生长的微生物数量会增加或积累,在低浓度下,重金属对微生物数量一般有刺激作用,而在高浓度下一般为抑制作用,也有表现出刺激作用。

U 2+, Co 2+ and Mn 2+ whose concentrations were 40, 40, 20μg·L -1 respectively could increase the AKP activity significantly in mysis, but higher con...

o2 +在 2 0μg·L-1时明显提高两种酶的活性。而Ni2 +只使两种酶活性降低。鉴于碱性磷酸酶和ATPase与生长发育直接相关,金属离子对对虾幼体生长的影响与对两种酶活性的影响基本一致,因此体内这两种酶活性的高低可作为判别环境因素是否适合对虾幼体生存的指标。

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