Xem 1-19 trên 19 kết quả Nuclear transfer
  • Tuyển tập các báo cáo nghiên cứu khoa học quốc tế về bệnh thú y đề tài: Modification of maturation condition improves oocyte maturation and in vitro development of somatic cell nuclear transfer pig embryos

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  • Tuyển tập các báo cáo nghiên cứu khoa học quốc tế về bệnh thú y đề tài: Autologous somatic cell nuclear transfer in pigs using recipient oocytes and donor cells from the same animal

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  • Tuyển tập các báo cáo nghiên cứu khoa học quốc tế về bệnh thú y đề tài: Production of cloned sei whale (Balaenoptera borealis) embryos by interspecies somatic cell nuclear transfer using enucleated pig oocytes

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  • This book includes contributions from researchers around the world on numerical developments and applications to predict fluid flow and heat transfer, with an emphasis on thermal hydraulics computational fluid dynamics. Our ability to simulate larger problems with greater fidelity has vastly expanded over the past decade. The collection of material presented in this book augments the ever-increasing body of knowledge concerning the important topic of thermal hydraulics.

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  • I. Introduction An important aspect of nuclear reactor core analysis involves the determination of the optimal coolant flow distribution and pressure drop across the reactor core. On the one hand, higher coolant flow rates will lead to better heat transfer coefficients and higher Critical Heat Flux (CHF) limits. On the other hand, higher flows rates will also in large pressure drops across the reactor core, hence larger required pumping powers and larger dynamic loads on the core components.

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  • The handbook includes information on thermodynamics and the properties of fluids; the three modes of heat transfer - conduction, convection, and radiation; and fluid flow, and the energy relationships in fluid systems. This information will provide personnel with a foundation for understanding the basic operation of various types of DOE nuclear facility fluid systems.

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  • Gamma rays were discovered by Villard more than a hundred years ago. Rutherford gave the name -rays to the electrically neutral radiation emitted by the naturally occurring radioactive materials. Gamma rays are electromagnetic radiation, photons, which arises due to energy changes in the nucleus. It does not appear as an independent form of radiation, but it follows  and β decay, in those cases when the newly created core of the offspring is found in the excited state.

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  • Nuclear Reprogramming Development naturally progresses from totipotent fertilized eggs to pluripotent epiblast cells, to multipotent cells, and finally to terminally differentiated cells. According to Waddington's epigenetic landscape, this is analogous to a ball moving down a slope. The reversal of the terminally differentiated cells to totipotent or pluripotent cells (called nuclear reprogramming) can thus be seen as an uphill gradient that never occurs in normal conditions.

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  • Rarely in the modern history of humans has biology played such an important role in human affairs as it does today. In the eighteenth and nineteenth centuries, explorers stimulated the first major advance in biology by bringing back countless new species that Darwin, and others, put into a logical order based on the theory of natural selection. The development of evolutionary thinking and the clarification of the rules of genetic inheritance resulted in the theoretical base for targeted artificial selection—an essential component of progress in biology and agriculture....

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  • The present book is the final milestone in the radioecology programme, RAD, carried out from 1990 to 1993 under the Nordic Committee for Nuclear Safety Research, NKS. This work was done in parallel to three other NKS programmes: Reactor safety (SIK), Waste and decommissioning (KAN), and Emergency preparedness (BER). The NKS was established in 1966 and was financed by the Nordic Council of Ministers from 1977 to 1989.

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  • TTrade, he Senate Committee on Environment and Public Works, the House Committee on Foreign Affairs, the House Committee on Energy and Commerce, the Senate Committee on Foreign Relations, and the House Subcommittee on International Development, Finance, and Monetary Policy requested an assessment of energy and environmental technology transfer to Central Europe and the former Soviet Union. The intent was to determine how U.S. energy technology can help resolve the economic and environmental problems in the region....

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  • Overall, the rapid development in the market for credit risk transfer played a major role altering banks’ functions. Structurally, securitization allowed banks to turn traditionally illiquid claims (overwhelmingly in the form of bank loans) into marketable securities. The development of securitization has therefore allowed banks to off-load part of their credit exposure to other investors thereby lowering regulatory pressures on capital requirements allowing them to raise new funds.

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  • The present book is the final milestone in the radioecology programme, RAD, carried out from 1990 to 1993 under the Nordic Committee for Nuclear Safety Research, NKS. This work was done in parallel to three other NKS programmes: Reactor safety (SIK), Waste and decommissioning (KAN), and Emergency preparedness (BER). The NKS was established in 1966 and was financed by the Nordic Council of Ministers from 1977 to 1989.

    pdf501p phoebe75 01-02-2013 20 3   Download

  • Building engineering physics comprises a unique mix of heat and mass transfer physics, materials science, meteorology, construction technology and human physiology necessary to solve problems in designing high performance buildings. Add to this the requirement for creative design and rigorous engineering analysis, and it can be seen that building engineering physics is quite distinct from any of the established applied science or construction engineering professions.

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  • The process of generating power depends on several energy-conversion processes, starting with the chemical energy in fossil fuels or the nuclear energy within the atom. This energy is converted to thermal energy, which is then transferred to the working fluid, in our case, steam. This thermal energy is converted to mechanical energy with the

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  • Gas–liquid multiphase flows play an essential role in the workings of Nature and the enterprises of mankind. Our everyday encounter with liquids is nearly always at a free surface, such as when drinking, washing, rinsing, and cooking. Similarly, such flows are in abundance in industrial applications: heat transfer by boiling is the preferred mode in both conventional and nuclear power plants, and bubbledriven circulation systems are used in metal processing operations such as steel making, ladle metallurgy, and the secondary refining of aluminum and copper.

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  • Micromanipulation involves a well-integrated set of technologies in assisted reproductive technology (ART). Its applications are diagnostic as well as therapeutic, and it is practiced in mature gametes and all stages of preimplantation embryos.

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  • Many biological C-H activation reactions exhibit nonclassical kinetic isotope effects (KIEs). These nonclassical KIEs are too large (kH/kD 7) and/or exhibit unusual temperature dependence such that the Arrhenius prefactor KIEs (AH/AD) fall outside of the semiclassical range near unity. The focus of this minireview is to discuss such KIEs within the context of the environmentally coupled hydrogen tunneling model.

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  • The oxygen-evolving photosystem II (PS II) complex of red algae contains four extrinsic proteins of 12 kDa, 20 kDa, 33 kDa and cytc-550, among which the 20 kDa protein is unique in that it is not found in other organisms.We cloned the gene for the 20-kDa protein from a red algaCyanidium caldarium. The gene consists of a leader sequence which can be divided into two parts: one for transfer across the plastid envelope and the other for transfer into thylakoid lumen, indicating that the gene is encoded by the nuclear genome....

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