natural strain 中文意思是什麼
natural strain
解釋
固有應變-
In the research field of food preservation, an intense interest for scientists is focused on the isolation of antimicrobial substances from microbial metabolites. natural biopreservatives derived from traditional fermented foods are generally recognized as safe. in this paper, one strain screened for its safety and broad antimicrobial spectrum and its antimicrobial substance - - bacteriocin are studied in detail
本文從傳統的發酵食品中篩選出一株安全、具有廣譜抗菌活性的芽孢桿菌，並對其抗菌活性物質細菌素進行分析，為微生物天然生物防腐劑的開發以及在食品中的應用提供理論依據。 -
However it is susceptible to protease ( s ) and cannot express in a large amount in the sporulation phase of natural occurring strain of b. s
但它在野生型菌株中的表達量低，易被蛋白酶降解失活。 -
3. the effect of sporulation - independent promotor on toxicity of natural strain in order to study the effect of sporulation - independent promotor ( p3a ), p3a was spliced with the cry1c gene, then inserted into the shuttle vector pht304, and then recombinated plasmid pbmb827 was obtained. after transferring pbmb827 into strain ybt - 1520, it was surprising that the transformants had almost no potency against all lepidopteran larvae tested
3非依賴芽胞形成icp的cry3a啟動子（ p _ （ 3a ） ）對野生菌株特性的影響帶p _ （ 3a ）和cry1c基因的重組質粒pbmb827轉入ybt - 1520 ，轉化子對所測昆蟲的毒力下降非常明顯，芽胞和晶體也很難脫落。 -
In this study, one strain of avian rotavirus was isolated from a chicken with natural diarrthoea. isolation and cultivation of the rotavirus was attemped by the inoculating on monolayers of marc 145 cells with a suspension of faecal material containing the rotavirus
本文對發生在山東某地雞流行性腹瀉病例的病原進行了研究。用胰蛋白酶處理病雞的糞便和腸內容物，接種marc145細胞，盲傳數代後分離到一株病毒。 -
The natural vibration spectrum curve is measured and the critical velocity to induce trashrack bar galloping is calculated. the effect of bar spacing on the bar strain and the characteristics of the exciting force are discussed. by fatigue analysis it is obtained that the service life of weld at the fixed end of the bar is about 13
分析了發電工況和抽水工況時的振源特性，討論了柵條凈距對柵條應變的影響，按鋼結構設計規范對柵條進行了疲勞計算， 1 ~ #測點處可視為不會發生疲勞破壞， 2 ~ #測點焊接處的疲勞壽命約為13 . 6年。 -
This device is easy to operate, safe, effective, without side - effects. it treats diseases such as migraine, trigeminal neuralgia, peripheral facial palsy, sciatica, toothache, scapulohumeral periarthritis, sprain, muscular strain, ect. thus it has gained wide favorable acceptance from acupuncturists and patients of many countries. sales networks are established in more than 30 countries including usa, france, canada, spain, italy, england, australia, thailand, vietnam, etc. this device is a natural, health preserving product
該儀器操作簡便、安全有效，尤其對常見病，如偏頭痛、三叉神經痛、周圍性面神經麻痹、坐骨神經痛、牙痛、肩周炎、扭挫傷、肌肉勞損等癥均有顯著療效，博得了世界各國針灸師和廣大患者的普遍青睞，銷售網路已遍布美國、法國、加拿大、西班牙、義大利、英國、澳大利亞、印尼、泰國、越南等三十多個國家和地區，是新一代的醫療保健產品。 -
The mechanic character, destroying pattern, the ductile and dissipation energy capacity of this composite structure under the earthquake have been clarified. the stiffness degradation, natural frequency, damping ratio of this structural system with the development of intensity of earthquake have also been investigated. with consideration of the top displacement, drift of story and micro - strain of longitude steel bars, the equivalent shell wall method has been presented in order to simplify the design of such type structure
通過試驗，掌握了該結構體系在水平地震荷載作用下的受力特點、變形與耗能性能、結構的破壞形態等力學指標：得到了結構在不同地震烈度條件下的剛度變化、自振頻率、阻尼比等動力特性；綜合結構的頂點位移、層間轉角以及鋼筋的微應變，提出了適合於該結構體系簡化設計的「等效剪力墻法」 。 -
Transformant ybt - 833 - 1 kept all indigenous plasmids, ybt - 833 - 2 lost a plasmid carrying crylab and ybt - 833 - 3 lost all indigenous plasmids carrying icp genes. comparing their potency with natural strain ybt - 833, the overall toxicity of all transformants was not noticeably higher than strain ybt - 833
質粒pbmblc電脈沖轉入菌株ybt - 833 ，得到了幾個icp基因背景不同的轉化子，它們的綜合毒力較出發菌ybt - 833都沒能得到提高。 -
This article is associated with one of the projects called an intellectual decision technology for damage identification and maintenance of highway bridge in beijing sponsored by beijing natural scientific fund. this paper mainly focuses on the study of the application of the ideal damage identification parameter named strain modal
本文結合北京市自然科學基金重點項目? ?北京市公路橋梁損傷識別與維護智能決策技術的研究，著眼于目前一種較為理想的損傷識別參數? ?應變模態在公路橋梁損傷識別中的應用研究。 -
In order to prolong the natural life of fracturing pump valve, this article do much basic research work on fracturing pump value. firstly, kinetic characteristics of fracturing pump valve are stated particularly and analysed. through stimulated experiment based on practical working conditions, the wearing disciplinarian and forms of impact particle wear about fracturing pump valve are researched by comparing it with pure impact wear and abrasive wear. furthermore, the wear mechanism of impact particle wear and particle erosion are analysed. in the end, by using the fenite element analyzing tool ansys, the distributing law of stress and strain of fracturing pump valve at the state of closing and during the process of impact are analysed carefully
詳細闡述和分析了它的運動特性；根據其實際工況，通過模擬試驗，研究了壓裂泵閥沖擊磨料磨損的磨損規律和磨損形式，並且將其與純沖擊磨損、滑動磨料磨損進行了對比；分析了壓裂泵閥的沖擊磨料磨損、沖蝕磨損等磨損機理；藉助ansys有限元分析工具，對泵閥關閉狀態下和沖擊過程中的應力應變分佈規律進行了詳細分析。 -
The paper defines the natural strain - stress material model, and chose the special element of conta174 and prest179 to ensure the accuracy of the analysis
對所劃分的三種極限承載狀態所設置的模型對比分析了連接內力的變化規律。 -
Major difference of hn proteins lies in no. 18 - no. 75 amino acid residues on n - terminal which includes three active sites of hn protein. the influence on biological action, caused by the difference of hn protein, is needed to study further. hn gene has only four glycosylation sites, which is 1 or 2 less on amount than that of other strains. so, this difference can be take on as a natural mark of ndv b95 strain furthermore, the fragment encoding hn gene was excised from the positive clone pgem - hn with sail and saci enzyme, and purified by agrose gel fraction method. then the fragment was subcloned into the pet - 28c expressing vector digested by sail and saci restriction enzyme
作者將正確的重組克隆質粒pgem - hn用saii 、 saci雙酶切，電泳回收目的片段，將其亞克隆到經saii 、 saci雙酶切處理的pet - 28c中，轉化大腸桿菌tgi感受態細胞，得到的轉化子經pcr鑒定和酶切分析，篩選出符合閱讀框的重組子，構建成重組表達質粒pet - hn ，並在大腸桿菌bl _ （ 21 ） （ de _ 3 ）宿主菌中成功地表達了含目的蛋白的融合蛋白，融合蛋白的分子量約66kd ，加入iptg誘導8h后，蛋白表達幾乎達到最高水平。 -
The natural mode of vibration of structures can be expressed in the form of the curvature model. and it is connected correspondingly to strain
曲率模態反映的是結構的固有振型，它與應變存在著一一對應的關系。 -
However, the yield of d - amino acids has been tempered by some limited factors from strain per se resulting in the shortages of that goods in the markets. therefore, scientists are trying to substitute engineered strains for natural strains in the process described above
目前，用微生物菌體轉化生產d -型氨基酸的工藝路線已經產業化，但天然菌體轉化工藝存在一些限制因素，阻礙了d -型氨基酸的擴大生產，導致產品短缺。
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