Xem 1-20 trên 96 kết quả Sequence organization
  • A primer, we are told by the Shorter Oxford English Dictionary (Onions, 1980:1,670), is “a small introductory book on any subject.” Some ten years ago, amidst a mixture of encouragement and pestering by colleagues, I set about writing a primer in conversation analysis. I had been teaching a two-term course called “Conversational Structures” to classes of both undergraduate and graduate students for over twenty years by then, and more abbreviated courses to one or the other of these cohorts for several years before that.

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  • The term DNA sequencing refers to methods for determining the order of the nucleotides bases adenine,guanine,cytosine and thymine in a molecule of DNA. The first DNA sequence were obtained by academic researchers,using laboratories methods based on 2- dimensional chromatography in the early 1970s. By the development of dye based sequencing method with automated analysis,DNA sequencing has become easier and faster.

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  • Automated DNA sequencing is a core research tool used by almost every research biochemistry lab. It is used to determine the sequence of DNA, or the genetic code, that serves as the blueprint of life for every organism on Earth.

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  • This chapter introduce to amino acids, peptides, and proteins. In this chapter, students will be able to: Name amino acids and peptides, and draw the structures from their names. Explain why the naturally occurring amino acids are called L-amino acids; identify which amino acids are acidic, which are basic, and which are neutral; show how to synthesize amino acids from simpler compounds, and show how to combine amino acids in the proper sequence to synthesize a peptide.

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  • Lecture Biology - Chapter 17: Genome sequencing, molecular biology, and medicine. The topics discussed in this chapter are: How do defective proteins lead to diseases? What kinds of DNA changes lead to diseases? How does genetic screening detect diseases? What is cancer? How are genetic diseases treated? What have we learned from the human genome project?

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  • In this text, the basic mathematical properties of the golden ratio and its occurrence in the dimensions of two- and three-dimensional figures with fivefold symmetry are discussed. In addition, the generation of the Fibonacci series and generalized Finobacci series and their relationship to the golden ratio are presented. These concepts are applied to algorithms for searching and function minimization.

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  • Life on Earth originated and then evolved from a universal common ancestor approximately 3.7 billion years ago. Repeated speciation and the divergence of life can be inferred from shared sets of biochemical and morphological traits, or by shared DNA sequences. These homologous traits and sequences are more similar among species that share a more recent common ancestor, and can be used to reconstruct evolutionary histories, using both existing species and the fossil record. Existing patterns of biodiversity have been shaped both by speciation and by extinction....

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  • The study of parallel computing is just about as old as that of computing itself. Indeed, the early machine architects and programmers (neither category would have described themselves in these terms) recognised no such delineations in their work, although the natural human predilection for describing any process as a sequence of operations on a series of variables soon entrenched this philosophy as the basis of all normal systems.

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  • Organizing use cases and usage scenarios represents a necessary process of eliminating redundancies in large amounts of information. Analysis is an iterative process in which you gradually create structure in the information provided by different sources of information. In this activity, you will group the use cases you created in Module 5 by actors and actions. Then you will eliminate redundancies in both sets of use cases. Finally, you will review the usage scenarios to determine if there are task sequences that should be consolidated as usage scenarios under a new use case. ...

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  • Amines are extremely important intermediates and end products of the chemical industry and are often obtained by hydrogenation of the corresponding nitro compounds or imines. A search of the literature reveals, that hydrogenation of nitro compounds catalyzed by well-defined molecular complexes in aqueous solutions is rare.

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  • Although processes for the production of LVOC are extremely diverse and complex, they are typically composed of a combination of simpler activities and equipment that are based on similar scientific and engineering principles. Chapter 2 describes how unit processes, unit operations, site infrastructure, energy control and management systems are combined and modified to create a production sequence for the desired LVOC product.

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  • In many small and shallow aquifers the hydrochemistry does not evolve further. However, the baseline natural quality of groundwater may vary spatially within the same aquifer if the mineral assemblages vary, and also evolves with time as the water moves along groundwater flow lines. If an aquifer dips below a confining layer (Figure 2.5), a sequence of hydrochemical processes occurs with progressive distance down gradient away from the outcrop, including precipitation of some solids when relevant ion concentrations reach saturation levels for a solid mineral phase.

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  • Soon after the first sequences of proteins and nucleic acids became available for comparative analysis, it became apparent that they can play a key role for reconstructing the evolution of life. The availability of the sequence of several proteins prompted the birth of the field of molecular evolution, which aims at both the reconstruction of the biochemical history of life and the understanding of the mechanisms of evolution at the molecular level through the analysis of the macromolecules of existing organisms.

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  • It is clear from such a definition that unusual event de- tection entails a number of challenges. The rarity of an un- usual event means that collecting sufficient training data for supervised learning will often be infeasible, necessitating methods for learning from small numbers of examples. In addition, more than one type of unusual event may occur in a given data sequence, where the event types can be ex- pected to differ markedly from one another.

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  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: The complete chloroplast genome sequence of Citrus sinensis (L.) Osbeck var 'Ridge Pineapple': organization and phylogenetic relationships to other angiosperms

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  • Over the past several years, scientists from the United States and around the world have been using a technique called DNA sequencing to unlock the genetic code of many different organisms. With code in hand, scientists can design sophisticated experiments that will inform our understanding of how an organism develops and functions. To date, they have carried out partial or complete DNA sequencing on human, mouse, rat, bacterial, and plant genomes. A major finding that was confirmed from these efforts is that most biologic functions are genetically conserved within and between species....

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  • Natural variations in pH and oxygen status are also important and are not restricted to deep environments. Many groundwaters in tropical regions in weathered basement aquifers and alluvial sequences have low pH, and the reducing conditions which prevail can promote the mobilisation of metals and other parameters of health significance such as arsenic.

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  • Impersonation is closely related to unauthorized access but is significant enough to be discussed separately. Impersonation is the ability to present credentials as if you are something or someone you are not. These attacks can take several forms: stealing a private key or recording an authorization sequence to replay at a later time. These attacks are commonly referred to as man-in-the-middle attacks, where an intruder is able to intercept traffic and can as a result hijack an existing session, alter the transmitted data, or inject bogus traffic into the network.

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  • Traditionally relational data has been stored in rows—i.e., as a sequence of tuples in which all the columns of each tuple are stored together on disk. This method has a long heritage back to early OLTP systems that introduced the “slotted page” layout still in common use today. However, analytical databases tend to have different access patterns than OLTP systems. Instead of seeing many single-row reads and writes, analytical databases must process larger, more complex queries that touch much larger volumes of data—i.e.

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  • Proteins might aggregate into ordered or amorphous structures, utilizing relatively short sequence stretches, usually organized in b-sheet-like assem-blies. Here, we attempt to list all available software, developed during the last decade or so, for the prediction of such aggregation-prone stretches from protein primary structure, without distinguishing whether these algo

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