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implant     
相关语句
  种植体
    Development of Bioactive Coated Implant Root and Its Biological Evaluation
    牙根种植体生物活性涂层的研制及其生物学性能评价
短句来源
    The Study on the Bioactive Ceramic-Titanium Composite Implant
    生物活性陶瓷-钛复合种植体研究
短句来源
    STUDY OF BIOACTIVE COATING ON SOFT MAGNETIC IMPLANT FOR FIXING OF FALSE TEETH
    口腔义齿固位用软磁种植体表面生物活性涂层的研究
短句来源
    Experimental study of hydroxyapatite coated Ti-75 alloy implant in dogs
    羟基磷灰石涂层的钛-75合金种植体的犬骨内种植实验
短句来源
    Observation of surface ultramicrostructure and quantitative analysis of bone density in implant-bone interface after surface modification of titanium implant
    钛种植体表面处理后的超微结构观察和周围骨密度的定量研究
短句来源
更多       
  种植
    A STUDY OF PREPARAATION AND PROPERTIES OF BIOLOGICAL PIEZOELECTRIC CERAMIC COMPOSITE IMPLANT MATERIALS
    生物压电陶瓷复合种植材料的制备与性能研究
短句来源
    Development of Bioactive Coated Implant Root and Its Biological Evaluation
    牙根种植体生物活性涂层的研制及其生物学性能评价
短句来源
    The Study on the Bioactive Ceramic-Titanium Composite Implant
    生物活性陶瓷-钛复合种植体研究
短句来源
    STUDY OF BIOACTIVE COATING ON SOFT MAGNETIC IMPLANT FOR FIXING OF FALSE TEETH
    口腔义齿固位用软磁种植体表面生物活性涂层的研究
短句来源
    The Influence of Bone Quality Contacting with Dental Implant Apex on the Stress Distribution at the Bone/Implant Interface with Three-Dimension Finite Element Analysis
    种植牙根端接触骨质类型对骨界面应力分布影响的三维有限元分析
短句来源
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  植入
    AN INTERFACE ANALYSIS BETWEENC/SiC IMPLANT AND BONE
    骨与碳/碳化硅植入体的界面分析
短句来源
    EH composite artificial bone implant research in animal
    EH型复合人工骨材料动物体内植入研究
短句来源
    Biological Evaluation of A New Titanium Alloy, TAMZ, as Surgical Implant Material
    外科植入TAMZ合金生物学评价
短句来源
    Experimental study of the implant of hydroxyapatite-coated titanium alloy
    羟磷灰石涂层钛合金植入材料的实验研究
短句来源
    Objective The physical and chemical parameters of a new implant of hydroxyapatite coated titanium alloy, its biocompatibility to host bone and the maximal shear strength at the interface between bone and HAP were investigated, with simultaneously assess the value of this product as artificial bone or prosthetic material in clinical application.
    目的 通过测定一种新的羟磷灰石 (HAP)涂层钛合金植入材料的理化参数、与宿主骨的生物相容性观察及骨 HAP界面最大剪切强度的测定 ,评估该材料作为人工骨或人工关节材料的临床应用价值。
短句来源
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  植入物
    EXPERIMENTAL STUDY ON WEAR PARTICLE INDUCED ASEPTIC LOOSENING OF TITANIUM ALLOY IMPLANT
    人工关节磨损颗粒诱导钛合金植入物松动的实验研究
短句来源
    Experimental study on ectopic osteogenesis of BMP/PLA implant
    BMP/PLA植入物异位成骨的实验研究
短句来源
    The Comparative Evaluation on the Biocompatibility of Different Types of Surgical Implant
    不同类型外科植入物组织学生物相容性评价比较
短句来源
    The dynamic observation on fatigue crack of interface between bone and porous coated implant
    人工关节的生物学固定:微孔涂层植入物与骨组织界面疲劳裂纹的动态观察
短句来源
    Method:Three special particles of UHMWPE, Ti-6Al-4V and Co -- Cr-- Mo were used respectively to inducethe change of periimplant bone structure and the loosening of a well-fixed implant made of titaniumalloy in rabbit femur or tibia. The bone structure was observed from X-ray film with computerizedimage analysis system(CIAS) and implant loosening was assayed by push-out test.
    方法:本实验采用X线摄片骨密度灰度值测定以及植入物推出力学强度测试等手段,对Ti6Al-4V、Co—Cr—Mo与UHMWPE三种微小颗粒诱导的假体周围骨结构改变及假体松动作定量分析。
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      implant
    Magnesium alloys are potential to be developed as a new type of biodegradable implant material by use of their active corrosion behavior.
          
    In vivo study of degradable magnesium and magnesium alloy as bone implant
          
    Undecalcified cross-sections of implant were performed to observe bone-implant by scanning electron microscopy (SEM) and energy dispersive spectromicroscopy (EDS).
          
    The results indicate that magnesium is biocompatible, osteo-conductive and is a potential material for use as a degradable bone implant.
          
    Simulation of implant distribution with the inverse Fokker-Planck equation
          
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    Several decisive experiments have proved that the development of eggs in lepidop-terous insects does not need the presence of corpora allata. However, it is worthy tonote that the lepidopterous insects so far used are species which are unable to feed inthe adult stage and whose eggs are already ripened during the pupal development. Wedoubted whether this conclusion can be applied to all lepidopterous insects. In order tosolve this problem, experiments were performed on the armyworm, the adult of whichrequires...

    Several decisive experiments have proved that the development of eggs in lepidop-terous insects does not need the presence of corpora allata. However, it is worthy tonote that the lepidopterous insects so far used are species which are unable to feed inthe adult stage and whose eggs are already ripened during the pupal development. Wedoubted whether this conclusion can be applied to all lepidopterous insects. In order tosolve this problem, experiments were performed on the armyworm, the adult of whichrequires to feed on honeydew or nectar as the supplementary nutrients to ripe theireggs. The development of eggs in the adult ovarioles may be divided into three stages; i.transparent opalescent stage; ii. yolk deposition stage, iii. mature stage. The whole pro-cess was completed in a period of 5 days. Gross anatomical observation showed thatthere was a rough correlation between the secretory activity of the corpora allata and thevitellinogenesis of the eggs (Fig. 5). In the decapitated female moths which had previously well fed on honey afteremergence, the eggs showed no sign of further development in the first 5 days. Whenthe brains or the corpora allata-corpora cardiaca complexes were implanted into theabdomens of these decapitated females, it was found that only the eggs of the recipientswhich had received a pair of corpor allata from the well-fed male and female adultshad developed to the stage iii, while those of the recipients which received the brainsor corpor cardiaca were unable to develop. Therefore, it is concluded that egg maturationin the armyworm is under the hormonal control of the adult corpora allata. It was alsoseen that the volume of the corpora allata in males increased continuously during theadult life-span, but their function in relation to sexual activity remained obscure in ourexperiments.

    内分泌控制昆虫卵巢的发育与成熟已为大家所承认;特别是在直翅目、半翅目、鞘翅目、革翅目、双翅目等昆虫中卵巢的发育已证实由内分泌中心之一——咽侧体所调节。但在某些鳞翅目昆虫中所得的试验结果与上述结论不一致,它们的卵巢发育似与咽侧体激素无关;这一事实已有分别用家蚕、天蚕蛾、蓖麻蚕等昆虫为材料的试验结果证明。我们分析了这些资料,发现这些昆虫的卵巢皆在蛹期发育成熟,成虫期均不取食。而在有些鳞翅目昆虫如粘虫等中,它们的卵巢需要在成虫期获得补充营养后方能成熟,我们怀疑粘虫卵巢发育成熟与内分泌的关系可能与上述几种昆虫不一样。 本试验用移植和结扎的方法证明了:(1)粘虫雌蛾卵粒中卵黄的沉积与咽侧体体积的变化相关,交配后咽侧体体积增大时卵黄沉积最快;(2)粘虫卵巢的发育与成熟是受咽侧体激素的控制,而与脑无直接关系;(3)激素控制粘虫卵巢发育与成熟的临界期为羽化取食后24小时;(4)粘虫成虫期雌雄两性咽侧体的体积均有明显变化,雄性的比雌性的大1—3倍。 因此,通过本工作说明了在鳞翅目昆虫中,由于生殖腺在蛹期或成虫期发育的不同,在生殖腺发育的内分泌控制机制上也有差别。

    The electroencephalographic changes during audiogenic seizures have been studied with chronically implanted electrodes in seizure-inclined albino rats under unrestrained and restrained conditions, It has been noted that the patterns of electroencephalogram during seizures varied with the number of seizure trials. There was no apparent epileptic discharge during the first 2—3 seizure trials. Sharp negative spikes with increasing amplitude could be recorded after a few seizure trials from the temporal region...

    The electroencephalographic changes during audiogenic seizures have been studied with chronically implanted electrodes in seizure-inclined albino rats under unrestrained and restrained conditions, It has been noted that the patterns of electroencephalogram during seizures varied with the number of seizure trials. There was no apparent epileptic discharge during the first 2—3 seizure trials. Sharp negative spikes with increasing amplitude could be recorded after a few seizure trials from the temporal region on one side at first and on both sides later on. The frequency of the spikes was usually 10—12/sec for a brief period immediately after the onset of the epileptic discharges, and then dropped suddenly to 2—3/sec, continuing at that frequency until the discharges stopped all together. As the number of the seizure trials increased, the epileptic discharges began to spread to the fronto-parietal regions of both sides. At the advanced stage of development, the epileptiform discharges tended to assume the spike-and-wave pattern. The electroencephalographic abnormalities bore no necessary relations to the muscular activities, since they could also be observed in animals paralyzed with succinylcholine or d-tubocurarine.

    本工作改进了慢性皮层电极的埋藏及引导方法,記录了大白鼠在自由以及限制活动的情况下发作听原性癲癎时,两侧顳区及額区皮层的脑电图变化。实驗結果表明最初2—3次听原性癲癎发作时脑电图上記录不到癎波,必須經过几次发作,才能从一侧顳区皮层記到振幅逐漸增大、頻率为每秒10—12次的负相鋒波。再經过多次发作后,对侧顳区皮层也出現类似的鋒波。两侧顳区的鋒波彼此同步。其振幅在每次发作开始时逐漸增大,至1毫伏左右时不再继續增大,以后一直保持在这一高度。其頻率在每次发作开始时为每秒10—12次,几秒钟后很快地降到每秒2—3次,持續一段时間后再逐漸减慢以至完全消失。随着发作次数的进一步增多,两侧額区皮层也先后出現癎波。額区与顳区皮层的癎波完全同步,并随着发放頻率的降低,每个鋒波之后出現正相慢波,成为一种鋒一波組合。实驗証明,发作时皮层各区出現的癎波与肌肉活动之間并无平行关系,因为当动物被琥珀酰胆硷或筒箭毒硷完全麻痹后,鈴声刺激仍能誘发同样的癎样放电。

    In the previous studies we found that the pre-copulation period and the pre-oviposition period of the male and the female oriental migratory locust, Locusta migratoriamanilensis Meyen, were about 7 to 15 days after emergence in normal condition. If thefemales were isolated in artificial parthenogenetic state, the pre-oviposition period wasgreatly prolonged to about 40--60 days in average after emergence. From these experi-ments, we observed that the increase of the volume of corpora allata and the diameterof...

    In the previous studies we found that the pre-copulation period and the pre-oviposition period of the male and the female oriental migratory locust, Locusta migratoriamanilensis Meyen, were about 7 to 15 days after emergence in normal condition. If thefemales were isolated in artificial parthenogenetic state, the pre-oviposition period wasgreatly prolonged to about 40--60 days in average after emergence. From these experi-ments, we observed that the increase of the volume of corpora allata and the diameterof their nuclei and the amount of cytoplasm in histological sections from female sourceswere correlated with the increase of the fresh weight and the length of the leading oocytesin the ovary (Fig. 2). When the corpora allata of adults were extirpated 1--2 days afteremergence, the allatectomized males were still able to copulate with the normal femaleswhen sexually mature. However, the copulation rate of the old allatectomized maleswere lower than that of the normal males of the same age. The spermatozoa of theallatectomized males were still able to fertilize the eggs of the mature females. Theoocytes of the allatectomized females remained in undeveloped condition and they did notlay any eggs throughout their lives, although the allatectomized females could be forcedto copulate with the normal mature males. The length of the leading oocytes retainedtheir original level (Fig. 5, 8). When the corpora allata were implanted into the allatectomized females, those ope-rated females could restore their potential for ovary growth and development. If thecorpora allata were partially extirpated, the pre-oviposition period of these operatedfemales was prolonged for a considerable time. The normal females could lay more eggs,and the parthenogenetic females shortened the pre-oviposition periods, when they wereimplanted with extra corpora allata from the males and the females. In discussion we suggest that the egg-ripening is controlled by the corpora allatahormone and their action is mediated through the fat body.

    本文报导了东亚飞蝗生殖活动和内分泌器官之一——咽侧体的关系。从解剖组织学上观察到咽侧体体积增长,并表现出一定的细胞学变化;在雌蝗成虫中,咽侧体特别表现有周期性分泌活动。雌雄飞蝗羽化后1—2日内将咽侧体摘去,对雌雄成虫初期交配活动影响不大:但去咽侧体雄蝗到了后期交配次数较少,而去咽侧体雌蝗卵巢始终不能发育。如果将咽侧体植入正常交配雌蝗或人为孤雌生殖雌蝗体内,则缩短产卵前期并增加产卵量。摘去咽侧体的雌蝗又植入咽侧体,或割断咽侧体的神经连系,对雌蝗卵巢发育并无影响,并照常产下卵块。由此证明咽侧体是控制飞蝗卵巢发育的内分泌中心之一。

     
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