遺傳改變 的英文怎麼說

中文拼音 [yízhuàngǎibiàn]
遺傳改變 英文
genetic change
  • 遺 : 遺動詞[書面語] （贈與） offer as a gift; make a present of sth : 遺之千金 present sb with a gener...
  • 傳 : 傳名詞1 （解釋經文的著作） commentaries on classics 2 （傳記） biography 3 （敘述歷史故事的作品）...
  • 改 : Ⅰ動詞1 （改變） change; transform 2 （修改） revise; alter; modify 3 （改正） rectify; correct 4 ...
  • 遺傳 : [生物學] heredity; hereditary; inheritance; inherit
  • 改變 : change; alter; transform; turn; convert; mold; modify
  1. Another possible explanation for rococo genetic systems is atavism, in which some biological mechanisms revert back to an ancestral state, although presumably with modification, in a new, derived genetic background

    有關舊式遺傳學系統的另一個可能的解釋是隔代遺傳，在此過程中一些生物學機制恢復到一種原始生物才有的狀態，盡管該狀態可能會在一種新的衍生遺傳學背景下發生改變。
  2. This dissertation uses genetic algorithm to choose optimum parameters for the widely used pid controllers. in the optimization calculation process, mutation rate, cross rate and parameter range are adaptively changed to accelerate optimization process

    本文用遺傳演算法優化工程中廣泛使用的pid控制器的參數，採用變參數區間、變交叉變異概率等方法提高計算速度，並對適應值函數進行了改進。
  3. The method proposed in this thesis do well in solving the problems of multi - damping - ratio - spectra simulation. it is convenient to obtain the pareto optimal solution set of the multi - object question by using implicit parallel genetic algorithms and the method can meet the practical needs for simulating ground motions coinciding with multi - damping - ratio - spectra in seismic design. the crossing rate and variance rate are important parameters of genetic algorithms which affect the rate of convergence, the adapting rate of cross and variation in this paper can auto - adapt and according to stand or fall of current sample, it assures the sample approach to the pareto optimal solution set in fast convergent speed

    較好地解決多阻尼比反應譜擬合問題；本文方法通過一次運行就能獲得一組具有集系特性的地震動，在擬合多阻尼比反應譜的人造地震波集系的模擬方面有傳統方法所不能比擬的優勢，產生的人造波或人造波集系可滿足工程抗震設計需要；在遺傳演算法中，交叉概率和變異概率是影響收斂速度的重要參數，本文採用的改進自適應交叉概率和變異概率，可以根據當前樣本的好壞程度來自動地選擇適當的交叉概率和變異概率，以保證演算法始終以較好的速度向pareto最優解集逼近。
  4. Epigenetic marks are so named because they can dramatically affect the health and characteristics of an organism ? some are even passed from parent to child ? yet they do not alter the underlying dna sequence

    它們被稱為外遺傳標簽，是因為它們不會改變其下方dna的序列，但對生物體的健康及特徵卻有戲劇性的影響，有些甚至能從父母傳給子女。
  5. According to the least twin multiplication to calculating the sensitivity index in several water production functions. thus, the writer obtains the fitted the value of the sensitivity index and the varied rule. at the same time, the writer puts forward a new method named rag a ( real coding based accelerating genetic algorithm ) and combines raga with dpsa to calculating the best irrigation system under the non - sufficient irrigation of well irrigation rice in sanjiang plain

    根據《隨機水文學》理論中的時間序列分析法，建立了適合三江平原井灌水稻需水量預報的非平穩時序隨機模型；通過分析降雨隨機特性，選定季節性時序隨機模型，建立了適合三江平原井灌水稻降雨預報的月平均降雨模型；根據最小二乘法，計算出幾種常用水分生產函數中的敏感指數及敏感系數，進而得到三江平原適宜採用的水分生產函數漠型及模型中敏感指數的變化規律；本文提出遺傳動態規劃法（ raga ? dp ） ，即採用改進的基於實數編碼的加速遺傳演算法（ realcodingbasedacceleratinggeneticalgorithm ，簡稱raga ）與動態規劃法（ dpsa ）相結合，推求非充分灌溉條件下三江平原井灌水稻的最優灌溉制度。
  6. This modification includes : ( 1 ) selecting two important molecules as candidates, ( 2 ) choosing a promiscuous t - cell epitope, and two b - cell epitopes or conserved amino acid sequences from the two important molecules, ( 3 ) connecting them adequately through analysis by the molecule designing software. therefore, the synthetic new antigen may interfere with the process of fertilization by multiple ways and its contraceptive effects may be enhancing. based on the molecule designing methods, the b - lymphocyte cell epitope of sperm / testis specific protein sp17 and cyritestin which interfere with fertilization in mouse, as well as the promiscuous th cell epitope of the ribonuclease ( rnase ) in bovine were selected

    本研究以蛋白質分子設計的理論和方法研究避孕疫苗，將sp17和cyritestin關鍵表位和牛核糖核酸酶非選擇性th細胞表位合理組合，獲得新抗原- 35肽序列；並在合成、純化後分別與弗氏佐劑、免疫刺激復合物（ iscoms ）混合后免疫不同遺傳背景的雌性小鼠，觀察血清和生殖道內的特異性抗體滴度的動態變化、生育力的改變以及免疫后小鼠重要臟器的組織病理學改變：以及在ivf下，新抗原的特異性抗血清對精卵相互作用的影響及抗原在精子表面的特異性定位。
  7. A lineage that has spun off a lot of species will show more genetic change than one that has not

    一支在此後產生了大量物種的世系表現出的遺傳學改變將多於那些產生較少物種的世系。
  8. However, genetic improvement by in vitro culture in mustard ( brassica juncea coss. ), especially in chinese mustard, is restricted by the poor frequency of shoot regeneration, and no regeneration system is established yet

    芥菜類作物（尤其是中國芥菜）再生率偏低，在遺傳轉化、突變體篩選等方面尚未形成一個高效穩定的再生體系，從而制約了離體條件下遺傳改良的進程。
  9. Along with the development of the cytobiology and the molecular biology, and thoroughly research of the biophysics, the biochemistry, the genetics and immunology, it has cultivated the modem biological technology, such al genetic engineering, cellular engineering, enzyme engineering, fermentation engineering and so on, to change biology characteristic to carry on the material transformation, has formed the front biological examination technology : the dna probe, the pcr technology, the molecular mark, the bioluminescence technology, genechip technology and so on the widespread application of these advanced biotechnologies in dairy industry baa impelled the dairying technical transformation, and has been having vital significance to dairy production, research and dairy product security

    摘要隨著細胞生物學和分子生物學的發展及對生物物理、生物化學、遺傳學和免疫學研究的深入，培育了基因工程、細胞工程、酶工程、發酵工程等改變生物特性進行物質轉化的現代生物技術，形成了dna探針、 pcr技術、分子標記、生物熒光技術、基因晶元技術等前沿性的生物檢測技術，其在乳品工業中的廣泛應用，推動了乳業的技術變革，對乳品生產、研究和乳品安全意義重大。
  10. Epigenetic alterations in cell - type - specific gene expression control the transition of neural stem cells ( nscs ) from predominantly neurogenic to predominantly gliogenic phases of differentiation, but how this switch occurs is unclear

    細胞類型特異的基因表達之表觀遺傳學改變控制著神經幹細胞由神經元發生為主向膠質細胞發生為主的轉變，但是這一時相的切換機制還不清楚。
  11. The main contents of this paper is according to the structural characteristic of forced vibration, making use of the varying quantity data of free frequency of two different physical cantilever beam on the structural damage experiment basis, then using the bp network, genetic algorithm and the genetic bp algorithm to build up relation model between position, extent of structural damnification, and the varying quantity of free frequency

    其主要內容就是根據結構受迫振動特性，利用試驗測得兩根不同物理性質懸臂梁在受損傷產生裂紋前後的固有頻率改變量，使用bp網路、遺傳演算法、遺傳bp演算法，建立了結構損傷的位置、程度與結構固有頻率損傷前後改變量之間的關系模型。
  12. Twenty f1 combinations crossed among 5 varieties and strains different in fiber properties according to complete diallel crossing design were used to evaluate the heterosis and gene action of boll weight and lint percentage in high quality fiber property varieties in upland cotton in 1998 1999 for two year successively at nanjing. it was indicated that there existed small interactions with the environmental factors without maternal effects and the additive gene effect was in chief, attaining to 51. 2 % and 65. 4 % respectively for boll weight and lint percentage. the dominant effect was also in higher rate, 32. 6 % and 16. 8 % respectively. the population mean heterosis of boll weight and lint percentage over the mid - parental mean were relatively prominent 13. 3 % and 3. 5 % respectively in extreme significance. however, boll weight showed no significantly surpassing parental f1 heterosis over the better parent based on population mean ( 2. 0 % ) ; while the lint percentage expressed significant negative heterosis value ( - 2. 1 % ). the gene actions were in conformity with the heterosis expression. it was shown clearly that the f1 combinations crossed between parents with similar performances had relatively high dominant effects and significant positive f1 surpassing parental heterosis ( f1 heterosis over the better parent ) ; while no f1 combination crossed between the parents with prominent mutual difference surpassed the higher parent in yield components, which indicated that among those parents with less difference and close relationships, there still existed sufficient genetic variation or certain mechanism for creating variation and achieving greater advances in breeding. correlation analyses also indicated that there still existed severely undesirable negative correlation between yield and fiber properties as well as the difficulties for their simultaneous improvements

    利用5個具有不同纖維品質性狀的品種（系）配製完全雙列雜交組合20個，通過親本和f1的2年隨機區組試驗發現產量性狀的鈴重和衣分與環境的互作效應小，不存在母體效應，並以加性遺傳效應為主，分別占表型方差的51 . 2 %和65 . 4 % ;顯性遺傳效應所佔的比率也較高，分別為32 . 6 %和16 . 8 % .鈴重和衣分的群體平均優勢較大，分別為13 . 3 %和3 . 5 % ，達到了極顯著;鈴重的超親優勢為2 . 0 % ，不顯著;衣分為顯著的負值（ - 2 . 1 % ） .遺傳分析與雜種優勢結果一致.具體表現在產量性狀上，親本相當配製的組合雜合顯性較高，其超親優勢正向顯著，而極值親本（差異較大）所配組合沒有超過高親的.這表明親本差異小、親源關系較近的親本中仍然存在足夠的遺傳變異或某種機制以創造變異使育種取得更大的進展.相關分析表明了仍然存在嚴重的品質與產量的負相關，遺傳改良的難度較大
  13. This study was conducted to examine the interrelationship of 10 seed vigor traits in 12 wheat genotypes through variance, co - variance and path coefficient analysis, to determine broad - sense heritability, and to estimate genetic advance under selection. the genotypes showed significant difference for all traits, except for percentage of normal seedling. genetic correlation between conversion efficiency of seed reserve, electrical conductivity with other traits were not significant, showed that selection for any of them might be possible without hampering any other traits. however path coefficient analysis indicated that conversion efficiency of seed reserve, seed reserve utilization ratio have strong direct effect in affecting seedling weight, and that mean germination time has significantly negatively correlated in affecting gi. moderate to high estimates of broad - sense heritability, genetic coefficient of variation and expected genetic advance were obtained for electrical conductivity, germination index, mean germination time, seed dry weigh, seedling dry weigh, seed reserve depletion ratio indicating the possibility for improving these traits

    本研究利用12個普通小麥品種對10個種子活力性狀的遺傳變異和相關研究，表明除正常幼苗百分率外，其餘種子活力性狀在品種間均存在顯著的差異.種子貯藏物質轉換效率、電導率兩個性狀間及與其它性狀均無顯著的遺傳相關，因此對他們的選擇不會影響到其它性狀.通徑分析表明幼苗干重主要取決于種子貯藏物質轉換效率、種子貯藏物質利用速率;發芽指數主要由平均發芽時間決定.電導率、發芽勢、幼苗干重、種子干重、發芽指數、種子貯藏物質消耗比率6個性狀表現中到高的遺傳力、遺傳變異系數和相對遺傳進展，指明通過遺傳育種手段改良這些性狀是可能的
  14. Proteins carry genetic messages throughout the cell causing biochemical changes that can determine whether a cell behaes normally or abnormally

    這些蛋白攜帶有與細胞生化改變有關的整個遺傳信息，而正是這些生化改變左右了細胞功能的正常與否。
  15. Here we review molecular genetic progress in each of histological subtypes of ovarian carcinoma

    本文對卵巢癌及其不同組織學亞型分子遺傳學改變的研究進展進行綜述。
  16. A major component of wheat breeding programmes is to incorporate disease resistance, particularly to the various leaf and stem diseases, the races of which frequently change and genetic resistance continually breaks down

    小麥育種項目的一個重要部分是抗病育種，特別是針對各種葉和莖病，致病菌系經常改變，致使小麥的遺傳抗性不斷地失效。
  17. New delhi, apr 25 : impotency among indians is rising with one in every six persons becoming sterile due to various environmental and lifestyle changes and genetic factors, according to research conducted by the indian council of medical research ( icmr )

    新德里， 4月25日：根據印度醫學研究委員會（ icmr ）開展的研究顯示，由於環境和生活方式的諸多改變和遺傳因素，印度的性無能人口比例已經上升至1 ： 6 。
  18. In the first large - scale screen of genetic changes in cancer cells, researchers have found that a typical breast or colorectal tumor results from mutations in about 90 genes, with different sets of mutations producing the same type of cancer

    在首次癌細胞遺傳改變的大規模篩選中，研究者發現典型乳腺或者結直腸腫瘤源於約90種基因突變，不同的突變組合產生同種類型的癌癥。
  19. Conclusions a common genetic variant at the traf1 ? c5 locus on chromosome 9 is associated with an increased risk of anti ? ccp - positive rheumatoid arthritis

    結論：常見的9號染色體traf1 ? c5位點的遺傳改變與抗? ccp反應陽性的類風濕關節炎的風險增高相關。
  20. According to the construction and management experience of the national key laboratory of crop genetic improvement for years, this paper analyzed and proposed a pattern including the laboratory accurate orientation and maintaining the research direction invariable, the prominent discipline characteristic and the conformity discipline superiority, the construction specialty management organized group and the reasonable academic echelonment, straightening out the relations of laboratory and the discipline construction as well as the laboratory with the university and so on

    摘要結合作物遺傳改良國家重點實驗室多年來建設與管理經驗，分析並提出了準確定位並保持研究方向不變、突出學科特色並整合學科優勢、構建專職管理班子和合理學術梯隊、理順實驗室與學科建設關系以及實驗室與依託單位關系等實驗室運行機制和管理模式。
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