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排序方式: 共有4119条查询结果,搜索用时 15 毫秒
941.
Lev Podshivalov Anath Fischer Pinhas Z. Bar-Yoseph 《Archives of Computational Methods in Engineering》2014,21(4):399-479
Personalized medicine is an emerging field, considered by many in the biomedical community to be among the upcoming approaches to medical treatment. To embrace this new challenge, physicians need a better understanding of the biological processes in the human body, as well as precise diagnostic tools and patient-specific treatments. In response, the last three decades have witnessed a major shift in tissue engineering development, from treating bone tissue at the macro-scale level only to treating it at complex multiscale levels. Researchers have begun striving for a better understanding of bone structure and mechanics, and then applying this knowledge in designing new medical treatments and procedures. Today computational methods, including finite element analyses, are the tool of choice for biomechanical research of bone tissues. Moreover, bone multiscale modeling can become a vital part of a comprehensive computerized diagnostic system for patient-specific treatment of metabolic bone diseases, fractures and bone cancer. This review paper describes the state of the art in multiscale computational methods used in analyzing bone tissue. The discussed methods and techniques can serve as a base for the creation of such an envisioned diagnostic system. 相似文献
942.
943.
V. Fischer 《Forschung im Ingenieurwesen》1930,1(7):268-276
Zusammenfassung Es werden die Gleichgewichtsbedingungen für ein Dampfgemisch von Kohlenoxyd, Stickstoff und Wasserstoff und ein Flüssigkeitsgemisch
von Kohlenoxyd und Stickstoff aufgestellt und auf einen besonderen Fall der Zerlegung dieses Gemisches angewendet. In Erg?nzung
dazu folgt eine allgemeine thermodynamische Darstellung des Trennungsvorganges, aus der sich die eingangs verwendeten Gleichungen
durch Vereinfachungen ergeben. 相似文献
944.
Manuela R. Duxenneuner Peter Fischer Erich J. Windhab Justin J. Cooper-White 《Microfluidics and nanofluidics》2014,16(4):743-755
This paper reports the visualization of droplet formation in co-flowing microfluidic devices using food-grade aqueous biopolymer–surfactant solutions as the dispersed droplet phase and sunflower oil as the continuous phase. Microparticle image velocimetry and streak imaging techniques are utilized to simultaneously recover the velocity profiles both within and around the dispersed phase during droplet formation and detachment. Different breakup mechanisms are found for Newtonian–Newtonian and non-Newtonian–Newtonian model water-in-oil emulsions, emphasizing the influence of process and material parameters such as the flow rates of both phases, interfacial tension, and the elastic properties of the non-Newtonian droplet phase on the droplet formation detachment dynamics. 相似文献
945.
Cheryl Hartfield Alasdair McDowall Bruce Loveland Kirsten Fischer Lindahl 《Microscopy research and technique》1991,18(2):148-156
Thymus-leukemia (TL) antigen is a class I molecule of the major histocompatibility complex that is expressed on the surface of mouse cortical thymocytes. Though not expected, it has been reported that TL antigen can be found on isolated mitochondria of TL+ cells. We used immuno-cryoultramicrotomy to look for TL on mitochondria in situ, thereby avoiding the plasma membrane contamination that occurs when isolating organelles. Establishing optimal fixation conditions was crucial, as mitochondrial structure was not preserved by the low concentrations of fixative needed for detection of antibody labeling. The plasma membranes of tissue culture and thymus cells were labeled well with anti-TL antibody and protein A-gold conjugate, while mitochondria within the cells were not labeled. Isolation of mitochondria on a one-step Ficoll gradient resulted in a purer organelle preparation than did isolation of mitochondria by centrifugation alone. Generally, mitochondria within this purer preparation were not labeled. Our data show that under conditions where contamination by plasma membrane is not a major concern, TL antigen cannot be detected on mitochondria. 相似文献
946.
SNOM is a non-contact stylus microscopy analogous to STM. Optical near-field interaction is used to sense approach and optical properties on the nanometre scale (?1 nm normal, 20–50 nm lateral). SNOM was demonstrated in transmission and reflection, in a topographic mode, and with amplitude as well as phase objects. The excitation of plasmons in the SNOM ‘tip’, a very recent development, greatly enhances sensitivity and permits intriguing new optical experiments. Overcoming the limit of diffraction, SNOM turns a long-held dream of optical microscopists into reality. 相似文献
947.
K. Fischer und K. Alpers 《Zeitschrift für Lebensmitteluntersuchung und -Forschung A》1908,16(12):738-741
Ohne ZusammenfassungMitteilung aus dem Chemischen Laboratorium der Auslandsfleischbeschaustelle Bentheim 相似文献
948.
949.
K. Fischer und O. Gruenert 《Zeitschrift für Lebensmitteluntersuchung und -Forschung A》1910,20(9):580-583
Ohne ZusammenfassungMitteilung aus dem Chemischen Laboratorium der Auslandsfleischbeschaustelle Bentheim. 相似文献
950.