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  2. H&R Block - Wikipedia

    en.wikipedia.org/wiki/H&R_Block

    H&R Block, Inc., or H&R Block, is an American tax preparation company operating in Canada, the United States, and Australia. The company was founded in 1955 by brothers Henry W. Bloch and Richard Bloch . As of 2018, H&R Block operates approximately 12,000 retail tax offices staffed by tax professionals worldwide.

  3. Molecular Structure of Nucleic Acids: A Structure for ...

    en.wikipedia.org/wiki/Molecular_Structure_of...

    t. e. " Molecular Structure of Nucleic Acids: A Structure for Deoxyribose Nucleic Acid " was the first article published to describe the discovery of the double helix structure of DNA, using X-ray diffraction and the mathematics of a helix transform. It was published by Francis Crick and James D. Watson in the scientific journal Nature on pages ...

  4. Human genome - Wikipedia

    en.wikipedia.org/wiki/Human_genome

    The mitochondrial genome is shown to scale at bottom left. The human genome is a complete set of nucleic acid sequences for humans, encoded as DNA within the 23 chromosome pairs in cell nuclei and in a small DNA molecule found within individual mitochondria. These are usually treated separately as the nuclear genome and the mitochondrial genome ...

  5. CRISPR gene editing - Wikipedia

    en.wikipedia.org/wiki/CRISPR_gene_editing

    CRISPR-Cas9. CRISPR gene editing (pronounced / ˈkrɪspər / "crisper") standing for "Clustered Regularly Interspaced Short Palindromic Repeats" is a genetic engineering technique in molecular biology by which the genomes of living organisms may be modified. It is based on a simplified version of the bacterial CRISPR - Cas9 antiviral defense ...

  6. Tetra Tech - Wikipedia

    en.wikipedia.org/wiki/Tetra_Tech

    Tetra Tech, Inc. Tetra Tech, Inc. is an American consulting and engineering services firm based in Pasadena, California. The company provides consulting, engineering, program management, and construction management services in the areas of water, environment, infrastructure, resource management, energy, and international development.

  7. Coding theory approaches to nucleic acid design - Wikipedia

    en.wikipedia.org/wiki/Coding_theory_approaches...

    Code construction via a Binary Mapping. Perhaps a simpler approach to building/designing DNA codewords is by having a binary mapping by looking at the design problem as that of constructing the codewords as binary codes. i.e. map the DNA codeword alphabet onto the set of 2-bit length binary words as shown: , , , .

  8. Zidovudine - Wikipedia

    en.wikipedia.org/wiki/Zidovudine

    Zidovudine ( ZDV ), also known as azidothymidine ( AZT ), was the first antiretroviral medication used to prevent and treat HIV/AIDS. It is generally recommended for use in combination with other antiretrovirals. [6] It may be used to prevent mother-to-child spread during birth or after a needlestick injury or other potential exposure. [6]

  9. Genetic engineering - Wikipedia

    en.wikipedia.org/wiki/Genetic_engineering

    t. e. Genetic engineering, also called genetic modification or genetic manipulation, is the modification and manipulation of an organism's genes using technology. It is a set of technologies used to change the genetic makeup of cells, including the transfer of genes within and across species boundaries to produce improved or novel organisms.

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