次生胞核 的英文怎麼說
中文拼音 [cìshēngbāohé]
次生胞核
英文
secondary nucleus-
Fossil evidence has suggested that there was a major jump in eukaryotic complexity some 600 million years ago, during a period dubbed the cambrian ex - plosion
化石證據已經顯示出在大約在6億年前，原核細胞復雜體在被稱為「寒武紀大爆發」的時期發生了一次大的飛躍。Nucleoli do not emerge in this process. the number of the organelles increase until secondary spermatocyte stage. mitochondria accumulate together, merging together with lysosomes and golgi bodies at the early spermatid stage, and finally the lamellar structure is formed, which forms the acrosome at last
在精子發生過程中，線粒體、內質網和核糖體逐漸增多，其中線粒體數目在次級精母細胞階段達到頂峰，並形成線粒體區，精細胞早期核內出現膜性泡結構，同時次級溶酶體與高爾基體大量存在，這些細胞器共同形成片層復合體，並參與頂體的形成。Bottom - up processing and feature detecting theory based on strong electrophysiological evidences has played a dominant role in the visual research for long time. people know top - down processing just by common sense. knowledge or experience are recalled from memory by reactivation of their neural representations and affected visual processes. however recently, researches from human and monkey provide experimental evidences for top - down processing. first, mnemonic representation of visual objects and faces, located in the ventral processing stream of visual perception in monkey, provide the best evidences of how neuronal codes are created by neurons that have the special ability to link the representations of temporally associated stimuli ; second, experiments suggest that not only bottom - up signals from the retina but also top - down signals from the prefrontal cortex can trigger the retrieval of associative codes, which may serve as a neural basis both for the conscious recall and for the visual processes affected by top - down processing further studies will improve people s understanding of the causal relation of activation and behavior by use of combined fmri and electrophysiology or lesion studies
聯想性編碼是通過學習由一些具有特殊功能的神經元建立的，這些神經元具有將時間性關聯刺激的表徵聯系起來的能力。其次，不僅來自視網膜的底-頂信號，而且來自前額葉的頂底信號都能觸發聯想性編碼的提取，既可以作為有意識回憶的神經基礎，又是頂-底加工影響視覺過程的基礎。腦損傷病人研究具有高時間解析度的人類功能性核磁共振成像functional magnetic resonance imaging ， fmri和猴fmri研究以及猴細胞電生理分析相結合，將進一步加強人們對視覺腦機制的全面理解。A sds - iso - propanol method suitable for tea plant, which was plentiful of tea polyphenols, had been developed using a modification of chen darning ' s method from different sample storage conditions such as fresh, dry and frozen shoots. it was a quick, easy, economical and effective method. the tactics were as follows : before the cell nuclear membranes were decomposed, the tea polyphenols and proteins etc. were removed
該法提取緩沖液使細胞維持一定的滲透壓，研磨時使細胞核基本保持完整；在細胞核被裂解之前去除細胞質中的茶多酚、大部分蛋白質和rna ；而後用sds裂解細胞核，異丙醇或乙醇沉澱dna ，這樣能經濟、快速和有效地從富含茶多酚、茶多糖等次生物質的茶樹新梢中提取基因組dna 。In this research, we tested 43 herbicides which include 20 different chemical classes and 11 different modes of action using 5 unicellular green algae. the results showed that chlorella pyrenoidosa was more sensitive than the other 4 algae and was suitable as target organism during herbicide screening
本研究在國內首次以5種單細胞綠藻為模式生物，參照oecd藻類生長抑制測試方法，對包括20種化學結構11種作用機制的43種商品化除草劑進行生物篩選試驗，發現蛋白核小球藻比其他4種藻更適合作為除草劑篩選中的靶標。This step - by - step, physiological narrative of patient rescues will immerse viewers in the stories that began as events unfold outside and the human body and progress inside ; teetering on the brink of death to reveal these incredible stories
醫生原以為是並發性偏頭痛，但再次發作時，以先進的核磁共振掃描檢查才發現，雪莉其實是中風，而且大腦受損部分嚴重腫脹，壓迫到正常腦細胞。分享友人