Xem 1-20 trên 85 kết quả Cell separation
  • The editor has incorporated scientific contributions from a diverse group of leading researchers in the field of hematology and related blood cell research. This book aims to provide an overview of current knowledge pertaining to our understanding of hematology. The main subject areas will include blood cell morphology and function, the pathophysiology and genetics of hematological disorders and malignancies, blood testing and typing, and the processes governing hematopoiesis. Blood cell physiology, biochemistry and blood flow are covered in this book....

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  • Cell membranes act as barriers to most, but not all, molecules. The development of a cell membrane that could allow some materials to pass while constraining the movement of other molecules was a major step in the evolution of the cell. Cell membranes are differentially (or semi-) permeable barriers separating the inner cellular environment from the outer cellular (or external) environment.

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  • Invasive Disease The treatment of a tumor that has invaded muscle can be separated into control of the primary tumor and, depending on the pathologic findings at surgery, systemic chemotherapy. Radical cystectomy is the standard, although in selected cases a bladder-sparing approach is used; this approach includes complete endoscopic resection; partial cystectomy; or a combination of resection, systemic chemotherapy, and external beam radiation therapy. In some countries, external beam radiation therapy is considered standard.

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  • Protein ubiquitination mediated by ubiquitin ligases plays a very important role in a wide spectrum of biological processes including development and disease pathogenesis. RING finger protein 13 (RNF13) is a recently identi-fied ubiquitin ligase which contains an N-terminal protease-associated domain and a C-terminal RING finger domain separated by a transmem-brane region.

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  • Non-Hodgkin's lymphomas were separated from Hodgkin's disease by recognition of the Sternberg-Reed cells early in the twentieth century. The histologic classification for non-Hodgkin's lymphomas has been one of the most contentious issues in oncology. Imperfect morphologic systems were supplanted by imperfect immunologic systems, and poor reproducibility of diagnosis has hampered progress.

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  • Cell biology of carbohydrate metabolism: Regulation of metabolic pathways, glucose as a regulator of metabolism, a carbohydrate response element (ChoRE) consists of 2 E-box like elements separated by 5 nucleotides, metabolic control analysis,...

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  • The pyruvate dehydrogenase complex (PDC) is subjected to multiple interacting levels of control in plant cells. The first level is subcellular compartmentation. Plant cells are unique inhaving twodistinct, spatially separated forms of the PDC; mitochondrial (mtPDC) and plastidial (plPDC). The mtPDCis the site of carbon entry into the tricarboxylic acid cycle, while the plPDCprovides acetyl-CoAandNADHfor de novofatty acid biosynthesis.

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  • After CFA made a random selection of the time frame from which credit files were to be analyzed, a generic number was assigned to keep the nameless study data from each study file separated from other study files. No copies or partial copies of any credit reports, on paper or electronically, were removed from any credit reporting agency location. Anonymous credit scores and an analysis of the credit data, as reviewed by credit reporting agency personnel for security and industry knowledge, was supervised and recorded by the CFA researcher for tabulation.

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  • The feedback from oil prices to economic activity is captured by a reduced-form production function that allows us to separately specify shocks to the output gap (transitory shocks to output), shocks to potential output (permanent shocks to the level of output), and shocks to potential output growth (permanent shocks to the growth rate of output). The richness of this specification helps us to model the complicated interactions of oil price movements and GDP, where both trend and gap decline if oil prices increase.

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  • The annual agriculture appropriations bill traditionally makes two separate appropriations for the federal crop insurance program. It provides discretionary funding for the salaries and expenses of the RMA. It also provides “such sums as are necessary” for the Federal Crop Insurance Fund, which finances all other expenses of the program, including premium subsidies, indemnity payments, and reimbursements to the private insurance companies. Government costs for crop insurance have increased substantially in recent years. After ranging between $2.1 and $3.

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  • Although the chapters included in this book are all addressing protein interactions, we try to separate them into two parts according to their objectives. Chapters in part 1 mainly focus on the investigation of some specific protein-protein or protein-nucleic acid interactions, and try to elucidate the mechanism of specific cellular processes. Part 1 provides some insight of why and how to study protein interactions, and illustrates some approaches to modulate protein interactions.

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  • There has been a growing realization in national governments and multilateral institutions that it is impossible to separate economic development issues from environment issues; many forms of development erode the environmental resources upon which they must be based, and environmental degradation can undermine economic development. Poverty is a major cause and effect of global environmental problems. It is therefore futile to attempt to deal with environmental problems without a broader perspective that encompasses the factors underlying world poverty and international inequality....

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  • Electrophoresis is defined as the transport of electrically charged particles in a direct current electric field. Electrophoretic separation is based on differential rates of migration in the bulk of the liquid phase and is not concerned with reactions occurring at the electrodes. In the early days, electrophoresis was carried out either in free solution or in the supporting media such as paper, cellulose acetate, starch, agarose, and polyacry lamide gel.

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  • Jennifer Peterson was 35 and pregnant when she discovered a lump in her breast. Tests showed she had invasive breast cancer. 21 The cancer and its treatment, separate and apart from the pregnancy, were a threat to her health. A health exception recognizes the added threat to her health posed by pregnancy during the onset and treatment of her cancer, while without such an exception Jennifer would have been forced to continue her dangerous pregnancy.

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  • The prospect of human cloning has been one of the most emotive and divisive issues to face UN negotiators and the international community in recent years. Despite widespread consensus amongst nations regarding the desirability of banning reproductive cloning, efforts to negotiate an international convention ground to a halt due to fundamental divisions regarding so-called research or therapeutic cloning.

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  • The Georgia Coalition for the Peoples’ Agenda has played a critical role in bringing together three powerful networks to examine the impact of air pollution from coal-fired power plants upon the African American community. The Black Leadership Forum, the Southern Organizing Committee for Economic and Social Justice and Clear the Air share a keen interest in promoting responsible public policies protective of human health and the environment.

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  • Data is increasingly generated by instruments that monitor the environment – telescopes looking at the heavens, DNA sequenc- ers decoding molecules, bar-code readers watching passing freight-cars, patient monitors watching the life-signs of a person in the emergency room, cell-phone and credit-card systems look- ing for fraud, RFID scanners watching products flow through the supply chain, and smart-dust sensing its environment. In each of these cases, one wants to compare...

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  • We especially paid attention not to distend the bladder too much to prevent a high irrigation pressure and a resultant TUR syndrome. Special attention was paid to avoid the injury to Santorini’s plexus and the rectum. The procedure was started from the 12 o’clock position, dividing the prostate into 6 parts, and resected specimens were collected separately to examine the distribution of cancer. The seminal vesicle was partially resected at its attached part to the prostate between the 4 and 8 o’clock positions to determine the invasion of cancer.

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  • The security architecture should be developed by both the network design and the IT security teams. It is typically integrated into the existing enterprise network and is dependent on the IT services that are offered through the network infrastructure. The access and security requirements of each IT service should be defined before the network is divided into modules with clearly identified trust levels. Each module can be treated separately and assigned a different security model.

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  • Caveolae are nearly ubiquitous plasma membrane domains that in adipo-cytes vary in size between 25 and 150 nm. They constitute sites of entry into the cell as well as platforms for cell signalling. We have previously reported that plasma membrane-associated caveolae that lack cell surface access can be identified by electron microscopy.

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