differential species 中文意思是什麼

differential species 解釋
（群叢中的）識別種
  • differential : adj 1 差別的，區別的；特定的。2 【數學】微分的。3 【物、機】差動的，差速的，差示的。n 1 （鐵路不...
  • species : n. 〈sing. , pl. 〉1. 種類；【生物學】（物）種。2. 【邏輯學】種。3. 【原子能】核素。4. 【法律】形式。5. 【宗教】聖餐物。
  1. In this paper, the nacre of hyriopsis cumingii ( lea ) which is one of the main freshwater pearl - forming mollusk in china is studied emphatically, as compared with the nacre of three species of saltwater pearl - forming mollusks, pinctada martensii ( dunker ), pinctada maxima ( jameson, and peteria penguin ( roding ). the basic characteristics of nacreous and prismatic layers are understood by powder x - ray diffraction analysis, trace elements analysis, amino acid composition of protein and differential thermal analysis

    本文以我國主要育珠蚌淡水三角帆蚌貝殼珍珠層為重點研究對象，以三種海水育珠貝馬氏珍珠貝、企鵝珍珠貝及大珠母貝貝殼珍珠層為對比研究對象，首先通過粉末x -射線衍射、微量元素分析、蛋白質氨基酸分析及差熱分析對珍珠層及其與之密切共生的稜柱層的基本特徵進行了初步研究。
  2. In this paper, phylogenetic relationship of 13 species involved in 6 genera of cruciferae wer e carried out through both the clones of homologous sequences with the primers designed on the basis of conserved regions of cyp86mf gene in cytochrome p450 gene superfamily and the differential analyses of them. meanwhile, complete sequences of some genes in cytochrome p450 gene superfamily were isolated and identified by smart pcr - race strategy, and expressed in e. colt. the results were as follows : ( 1 ) isolated by pcr from 11 species of cruciferae, eleven homologous gene segments that deduced amino acids were identities of over 80 % at nucleotide sequence level and similarities of over 70 % at amino acid sequence level

    本論文以已知的細胞色素p450基因超家族成員cyp86mf基因的保守區設計引物對十字花科重要蔬菜作物的6個屬13個物種進行了同源序列的分離克隆，通過核酸序列的差異比較分析，研究了該基因在不同物種中的進化關系；同時，通過保守引物的pcr擴增和race相結合的方法對十字花科植物不同物種的細胞色素p450基因家族成員基因全長進行了分離克隆、鑒定和原核表達的研究，獲得如下研究結果： （ 1 ）通過pcr從十字花科植物不同物種中擴增到11個可以推導出完整氨基酸序列的同源片段。
  3. According to the theory of differential inequality and the comparision theorem, we will establish some new and more practical criteria of the extinction, uniform persistence and globally asymptotical stability for partial species of the above system. since the narrate of the main theorem is long, we omit it. to see section 2 of chapter 3 for details

    通過利用微分不等式理論，比較定理及構造適當的lyapunov函數，得到了判別種群持續生存、滅絕和全局漸近穩定性的三個定理，這便是第三章的主要內容，由於定理較長，這里不作敘述，詳見第三章第二節。
  4. Generally, differential-species have had greater importance than character-species.

    一般講，區別種比特徵種更重要一些。
  5. A mathematic model of two - species competitive with stage structuer is considered. the quality theory of differential equation is applied. the existence and stability of the positive equilibrium are analysed

    摘要研究一類具有階段結構的競爭生態模型，運用微分方程定性理論方法，討論了各類平衡態的性質，得到正平衡態存在穩定的條件。
  6. Natural selection ( selection ) - - differential reproduction of different members of a species due to the variability in fitness among individuals or genotypes, leading to changes in allele frequencies over time

    天擇- -天擇是改變對偶基因頻率的主要因素，因為天擇的結果使某種基因型的個體減少，因而改變原有的對偶基因頻率。
  7. Co2 laser - based differential absorption lidar ( dial ) systems have been used extensively for the remote sensing measurement of molecular species in the atmosphere and trace gases, therefore, have important value in military and civilian fields

    基於二氧化碳激光器的差分吸收激光雷達（ co2dial ）系統被廣泛地應用於對大氣分子種類以及微量氣體進行遙感的測量之中，具有非常重要的軍事和民用價值。
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