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chiasma n.(pl. chiasmas, -mata ) 【生物...

Results : there was no contorting phenomenon of hemoglobin in pisces cyprinus carpio and amphibia rana catesbeiana in the the course of “ direct chiasma “ 、 “ crossing “ and “ surrounding “ experimentation 結果:鯉魚、牛蛙的血紅蛋白自身在“直接交叉” 、 “穿過” 、 “兜過”實驗電泳過程中均未出現扭曲現象。

Results : there was no contorting phenomenon of hemoglobin in pisces cyprinus carpio and amphibia rana catesbeiana in the the course of “ direct chiasma “ 、 “ crossing “ and “ surrounding “ experimentation 結果:鯉魚、牛蛙的血紅蛋白自身在“直接交叉” 、 “穿過” 、 “兜過”實驗電泳過程中均未出現扭曲現象。

chiasmatypy

In the phase of image pretreatment , the main jobs of this system includes dot operation , image swell , positive chiasma transform , edge extraction and edge swell , outline track , etc . because the visual system itself is a neural system , systematizer designed in the paper adopts bp neural network to accomplish computer image identification , the system has some advantages over the traditional one , but with the extensive application of bp neural network , the problems existing in bp neural network come forth increasingly 在系統軟件設計部分中,首先是對所選零件進行模式識別,包括圖像預處理、特征提取和分類器設計三個階段,其中在圖像預處理階段本系統主要做的工作有:點運算、圖像增強、正交變換、邊緣提取和邊緣增強、輪廓跟蹤等。由于視覺系統本身就是一個神經系統,故本文所設計的分類器采用bp神經網絡,其具有一些傳統技術所沒有的優點。

After explaining the chiasma and infiltration between the technology of “ man - computer exchange ” and other subjects , he briefly introduced the most influential events and fruits of its development 在仔細講解了“人機交互”技術作為一門學科與其他學科例如多媒體技術,認知心理學,人機工程學等的交叉滲透后,他簡要介紹了“人機交互”發展歷程中最有影響的事件和成果。

Bluetooth is a wireless communication technology developing fast among all the communication technologies for its perfect performance , easily applied , and competing and complementary chiasma with wlan 藍牙技術是一種數據傳輸選擇于ism頻段,實現條件相對成熟的短距離無線通訊技術,在市場投向上與wlan既相互爭奪也相互補充

Results : there was no contorting phenomenon of hemoglobin in pisces cyprinus carpio and amphibia rana catesbeiana in the the course of “ direct chiasma “ 、 “ crossing “ and “ surrounding “ experimentation 結果:鯉魚、牛蛙的血紅蛋白自身在“直接交叉” 、 “穿過” 、 “兜過”實驗電泳過程中均未出現扭曲現象。

Terminalization the movement of chiasmata to the end of the bivalent arms , a process that may occur during late prophase i of meiosis 交叉)移端:發生在第一次減數分裂后期,染色體交叉向二價體染色體臂的末端移動的過程。

Chiasmata are seen during this stage , and by the end of diakinesis the nucleoli and nuclear membrane have disappeared 在這個時期可以看見交叉,在終變期末細胞核中的核仁,核膜消失。

The chiasmata can slip off the ends of the bivalents , and thus chiasma frequency may be reduced by terminalization 有時交叉可以從二價體末端處滑開,因此移端過程可以降低交叉頻率。

Crossing over the exchange of material between homologous chromatids by the formation of chiasmata 交換:同源染色單體之間形成交叉時遺傳物質的交換現象。

Sax found average chiasma frequencies of 2 . 3 to 2 . 5 per bivalent in pines and larches Sax發現松樹和落葉松每條二價染色體的平均交叉頻率是2 . 3 2 . 5 。

Localization of chiasma 交叉局部化

Chiasma theory of pairing 配對交叉說

Chiasma fasciculorum opticorum 視束交叉

The chiasmata observed during the later stages of the meiotic prophase are cytological evidence of earlier cross-over events . 在減數分裂前期末所看到的交叉是在這以前發生了互換事件的細胞學證據。

Sax found average chiasma frequencies of 2.3 to 2.5 per bivalent in pines and larches . Sax發現松樹和落葉松每條二價染色體的平均交叉頻率是2.32.5。

Genetic recombination can occur without the formation of a chiasmata . 遺傳重組在沒有形成交叉的情況下,也可以發生。