The mice showed also ageing - associated decline in oocyte quality, as indicated by increased frequency of premature chromatid separation, spindle disruption and / or chromosome misalignments in mii oocytes of aged mice. the gv oocytes from aged mice normally matured in vitro. the percentages of pronuclear - stage embryos, 2 - cell embryos and blastocyst derived from mii oocytes of aged mice by in vitro fertilization ( ivf ) were comparable with ones of young mice, but pronuclei formed 1 h later in aged mice than in young mice
老齡小鼠gv期卵母細胞能正常體外成熟;老齡小鼠m期卵母細胞經體外受精后
形成原
核期胚、 2 -細胞期胚和囊胚的比率與年輕小鼠比較無顯著差異,但原
核形成時間延遲1小時;在老齡小鼠卵母細胞,注射牛精子抽提物或sr ~ ( 2 + )處理時所誘發的ca ~ ( 2 + )振蕩以及在減數分裂成熟及早期胚胎中的pkc分佈未發生改變。
The percentage of oocytes cleaved and formed pronucleus in either 0. 625 ( ag / ml or 1. 25ug / ml chx group was significantly higher than the control group ( p < 0. 05 ). however, when the concentration of chx was increased to 5 ug / ml, the cleavage rate and pronuclear formation rate were decreased significantly ( p < 0. 01 )
結果培養在0 . 625和1 . 25 g mlchx的卵母細胞的激活分裂率和總原
核形成率明顯高於對照組( p 0 . 05 ) ,而培養在5 g mlchx的卵母細胞的激活分裂率和原
核形成率則極顯著低於對照組( p 0 . 01 ) 。
The results show that the deposition of nickel on the substrate do not undergo upd process, but undergoes nucleation process. in the experimental conditions, the electrocrystallization of nickel follows the mechanism of three dimensional progressive nucleation and growth
結果表明,鎳在該基體上的沉積沒有經歷upd過程,鎳的電沉積經歷了晶
核形成過程,在所研究的外加電位范圍內,其電結晶按連續成
核和三維生長方式進行,外加電位對晶體生長具有顯著的影響。
Biological processes for the formation of carbonate concretions in the upper triassic wayao formation of guanling, guizhou
貴州關嶺上三疊統瓦窯組中碳酸鹽巖結
核形成的生物作用
With the thermodynamic theories and techniques, it is relatively easy to determine the phase equilibrium data with enough accuracy, however there still exist much more difficulties in crystallization kinetics study even for a simple binary system. that is the reason that nucleation and crystal growth rate are generally represented in form of the empirical expressions. the crystallization kinetic is important for crystallizer design, process control and optimization, and it is strongly depended upon the accurate characterization of process information concerning with multiphase flows and the further disclose of its mechanisms with suitable mathematical models
熱力學理論和方法已足以獲得準確的相平衡關系;然而即使對于簡單的二元物系的結晶過程,晶
核形成和晶體生長動力學的研究仍面臨許多困難,通常採用經驗模型表述,而動力學參數的準確性和可靠性是結晶器放大設計、過程式控制制與優化的關鍵,因此多相流信息的準確表徵、結晶機理的進一步揭示及建立起與之相適應的數學模型有著十分重要的學術研究和實際應用價值。
The paraffin section of the flag leaf of wheat during its senescence was observed with sem. the results showed : 1 ) during the senescence of wheat, the nuclear shape altered obviously
對小麥旗葉衰老過程中的石蠟切片進行掃描電鏡觀察,結果表明, ( 1 )旗葉衰老過程中,細胞
核形態發生明顯變化。
In this paper, we give a kernel shape estimation of m ( x ) using variable bandwidth local linear refression approch, and discuss the asymptotic normality, the convergence rate of mean square and convergence rate with probability
本文對上述模型,利用變窗寬局部線性回歸方法,給出了m ( x )的
核形估計,並討論了這一估計的漸近正態性、依概率收斂速度、和均方收斂速度。
Within the framework of sparse bayesian learning, the algorithm extends the relevance vector machine by combining global and local kernels adaptively in the form of multiple kernels, and the improved locality preserving projection ( llp ) is then applied to reduce the column dimension of the multiple kernel input matrix to achieve less training time
在稀疏貝葉斯學習的框架下,該演算法首先以多
核形式自適應結合全局
核函數和局部
核函數擴展相關向量機,然後應用改進的保局投影來約簡多
核輸入矩陣的列維數以減少訓練時間。
During spawning, the structure of oviduct is obviously affected. before laying eggs, there are many secretions in oviduct and lots of microvilli at the surface of epithelial cells. the clear cells contain lots of mitochondria, endoplasmic reticulums and golgi complexes
日本沼蝦產卵過程對輸卵管結構產生顯著的影響,產卵前,管腔內有很多分泌物,管壁上皮細胞表面有大量微絨毛,細胞內細胞器如線粒體、內質網、高爾基體等含量豐富,細胞
核形態正常。
Inhibition of the cupric complexes of amino acid on microsclerotia formation of verticillium dahliae
幾種氨基酸銅對大麗輪枝菌微菌核形成的抑制作用