查询词典 unicellular

A number of microplants with spherical, triangular, polyangular and boat-like shapes have been found both from the early Palaeoproterozoic Dashiling and Qingshicun Formations (ca. 2500- 2400 Ma) of the Doucun Subgroup of the Hutuo Group and the late Palaeoproterozoic Changzhougou and Chuanlinggou Formations (ca. 1800 -1700 Ma) of the Changcheng Group in North China. According to the features of these fossils, such as size, external shape and internal structure, they may belong to unicellular eucaryotic planktons.

在华北地区古元古代滹沱群豆村亚群的大石岭组、青石村组(约2500～2400 Ma)和长城群的常州沟组、串岭沟组(1800～1700 Ma)中存在着大直径的球形和形态呈三角形、多角形及船形微古植物，根据它们的大小、外部形态和内部结构等综合判别，它们可能属于单细胞真核浮游生物。

In this study, the genomic structure and regulatory elements of ApoD from 10 representive species including protozoan, invertebrate, protochordate and vertebrate were analyzed and compared. The genomic structure of ApoD is less conserved in organisms from protostome to deuterostome invertebrates, while it is highly conserved among chordates including amphioxus and verebrates. All four conserved cysteine residues are present in amino acid sequence of deuterostome ApoDs, while there are only two cysteine residues in amino acid sequence of protostomes ApoD. Structure divergence between protostome and deuterostome ApoD proteins suggests their function difference. The majority of regulatory elements are present in nearly all organism ApoD genes ranging from unicellular protozoan to mammals, suggesting that ApoD plays a very fundamental role, and possesses a conserved regulatory mechanism. However, there also exist some specific regulatory elements, which are present only in certain species and may perform some special roles.ApoD mRNA expression in murine NIH/3T3 fibroblasts exposed to various stresses such as as hydrogen peroxide and UV light shows dose-dependent increase. And a fly homolog of ApoD, Glial Lazarillo, whose overexpression results in increased resistance to hyperoxia as well as a extension of lifespan under normoxia and resistance to starvation without altering lipid or protein content.

本文首先从生物信息学角度对分属于原生动物、无脊椎动物、头索动物和脊椎动物类群的10种动物ApoD的基因结构及调控区的调控元件进行分析及比较，发现：(1)ApoD基因外显子-内含子结构从原生动物草履虫到原口动物再到后口动物海胆的进化过程中不保守，但在分析的几种脊椎动物中相当保守；(2)文昌鱼ApoD基因扮演从无脊椎动物到脊椎动物承上启下的角色，可能代表了脊椎动物ApoD基因原型；(3)四个半胱氨酸保守位点在后口动物中都存在，而在原口动物中只存在两个，原口、后口动物ApoD蛋白一级结构上的差异反映蛋白功能上可能也存在一定差别；(4)调控区大多数主要调控元件为不同动物共有，说明ApoD主要功能及其表达调控在进化中相当保守；(5)ApoD基因个别调控元件是随着物种进化而出现并开始发挥相关作用，如SF-1；还有一些调控元件在进化过程中还没有发现其规律，这说明ApoD某些功能和基因表达调控模式可能因物种不同而存在一定的差异。

In this study, the cytotoxicological impact of melamine was determined using a unicellular eukaryote bioassay model, the ciliated protozoan Tetrahymena pyriformis

实验利用一种单细胞真核生物模型——纤毛类原生动物梨形四膜虫研究了三聚氰胺的细胞毒性。

They may be unicellular or multicellular, simple, forked, sellate, downy, silky, long, or short.

毛可由单细胞或多细胞组成，有结构单一，叉状，具鞍的，也有柔软的，柔滑的，长形的或短形的。

Under favorable condition, it multiplies as a unicellular organism. Upon starvation, a pathway involving aggregation, mound, slug, culmination stages induces the formation of a fruiting body consisting of a head of spores supported on a stalk of vacuolated cells.

在营养丰富条件下，以单细胞形式存在；一旦食物匮乏，单个细胞聚集成多细胞体，细胞历经细胞丘、蛞蝓体、拔顶阶段完成发育和分化过程，最终形成由孢子细胞和柄细胞组成的子实体。

A long, threadlike appendage,especially a whiplike extension of certain cells or unicellular organisms that functions as an organ of locomotion.

鞭毛，鞭状体一种作为可移动器官的长的线状附属部分，尤指某种细胞或单细胞生物的鞭状伸展部分

Overall genome size, and by extension the amount of junk DNA, appears to have little relationship to organism complexity: the genome of the unicellular Amoeba dubia has been reported to contain more than 200 times the amount of DNA in humans. The pufferfish Takifugu rubripes genome is only about one tenth the size of the human genome, yet seems to have a comparable number of genes.

整个基因组的大小以及根据垃圾DNA量的范围，好象与生物体的关系不大：据说变形虫的单细胞基因组含有200倍以上人类DNA数量。pufferfish Takifugu rubripes基因只是人类基因的大约十分之一，然而好象有了一个可比较的基因数量。

Overall genome size, and by extension the amount of junk DNA, appears to have little relationship to organism complexity: the genome of the unicellular Amoeba dubia has been reported to contain more than 200 times the amount of DNA in humans. The pufferfish Takifugu rubripes genome is only about one tenththe size of the human genome, yet seems to have a comparable number of genes.

整个基因组的大小以及根据垃圾DNA量的范围，好象与生物体的关系不大：据说变形虫的单细胞基因组含有200倍以上人类DNA数量。pufferfish Takifugu rubripes基因只是人类基因的大约十分之一，然而好象有了一个可比较的基因数量。

By using 120 L plastic vessel as experimental container in the nursery workshop, the effects of autolyzed baker yeast as supplemental feed to unicellular algae in the diet of larvae of pearl ouster Pinctada martensii were studied. The aim of this study was to resolve such problems like unstable food supply and low utilization rate of easily cultivated Chlorella sp.

在实验车间内利用120L的塑料箱作为实验容器，采用自溶面包酵母作为单细胞藻的辅助饵料，研究其在马氏珠母贝育苗中的饵料效果，以期解决该贝育苗过程饵料供应不稳定、易培饵料品种小球藻Chlorella sp。

Trace fossils that are older than known animal fossils may have been formed by large unicellular organisms such as amoebas.

遗迹化石要比动物化石古老，它们可能是由大量单细胞生物形成的，比如：变形虫。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。