Review on DNA Micro Array Technologyand Its Application
Takale Worku,
Demessa Negassu
Issue:
Volume 2, Issue 4, December 2019
Pages:
44-50
Received:
9 September 2019
Accepted:
16 October 2019
Published:
6 January 2020
DOI:
10.11648/j.ajz.20190204.11
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Abstract: DNA microarrays are technology that measure the expression level of thousands of genes at the same time. They need become avital tool for a good kind of biological experiments. one among the most common goals of polymer microarray experiments is to spot genes related to biological processes of interest. DNA Microarray is one such technology that allows the researchers to analyze and address problems that were once thought to be non traceable. This technology has scepter the scientific community to manage the elemental aspects underlining the expansion and development of life, additionally on explore the genetic causes of anomalies occurring within the functioning of organisms. Microarrays area unit vital as a result of they possess a large variety of genes and additionally owingto their transportable size. An important implication of the fundamental dogma of molecular biology is that there should be a strong association between the presence of a given protein in a cell and the presence of the mRNA sequence that is transcribed to build that protein. If a protein is active in a given cell, there should be a large number of copies of the mRNA sequence corresponding to that protein. Conversely, if a protein is not active in a cell, there should be few copies of the corresponding mRNA sequence. Thus, DNA microarrays attempt to evaluate the presence or absence of proteins in a cell and their relative abundance by measuring the relative abundance of the corresponding mRNA sequences. This review addresses the potential uses of DNA microarray technology, principle of the technology, its application and limitation of the technology.
Abstract: DNA microarrays are technology that measure the expression level of thousands of genes at the same time. They need become avital tool for a good kind of biological experiments. one among the most common goals of polymer microarray experiments is to spot genes related to biological processes of interest. DNA Microarray is one such technology that al...
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An Overview of the Major Vegetation Classification in Africa and the New Vegetation Classification in Ethiopia
Issue:
Volume 2, Issue 4, December 2019
Pages:
51-62
Received:
31 July 2019
Accepted:
27 September 2019
Published:
7 January 2020
DOI:
10.11648/j.ajz.20190204.12
Downloads:
Views:
Abstract: Vegetation is classified using life forms, density, and seasonality. The objective of this review work was to list the vegetation classification, major plant species and geographic distribution in Africa, and the recent vegetation category in Ethiopia. The review search was focused on English-language and peer-reviewed literature. The vegetation types in Africa were classified into various groups using various criteria of categorization. It was grouped into 24 types, 16 types, and even five groups. Though the vegetation categorization in Africa was varied, this work focuses on the five major groups of vegetation that is forest, woodlands and shrub lands, grass lands, agricultural land, and swampy and mangrove vegetation. The vegetation types in Ethiopia were also grouped in different types across time. However, recently, the vegetation was classified into 12 major and 12 sub-types of vegetation. The major vegetation types are desert and semi-desert scrub¬land, Acacia-Commiphora woodland and bushland, wooded grassland of the western Gambella region, Combretum-Terminalia woodland and wooded grassland, dry evergreen Afromontane forest and grassland complex, moist evergreen Afromontane forest, transitional rainforest, ericaceous belt, afro-alpine belt, riverine vegetation, fresh-water lakes, marsh and floodplain vegetation and salt lakes, marsh and pan vegetation. The total number of higher plant species was expected to be between 6500-7000. Out of them, about 10-12% are endemic species in Ethiopia. This shows that still, lot of work is remaining to fully assess the types of plant species that are available in the country. These big vegetation variations both in the continent and in Ethiopia was associated with the existence of variation in climate, geology, and altitude. These again favor the existence of diverse plant species.
Abstract: Vegetation is classified using life forms, density, and seasonality. The objective of this review work was to list the vegetation classification, major plant species and geographic distribution in Africa, and the recent vegetation category in Ethiopia. The review search was focused on English-language and peer-reviewed literature. The vegetation ty...
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