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Carry On, Mr. Bowditch is a novel by Jean Lee Latham that was awarded the Newbery Medal in 1956. The book is a children's biography of Nathaniel Bowditch, a sailor and mathematician who published the mammoth and comprehensive reference work for seamen: The American Practical Navigator. It is an epic tale of adventure and learning.
Nathaniel Bowditch (March 26, 1773 – March 16, 1838) was an early American mathematician remembered for his work on ocean navigation.He is often credited as the founder of modern maritime navigation; his book The New American Practical Navigator, first published in 1802, is still carried on board every commissioned U.S. Naval vessel.
Jean Lee Latham was born in Buckhannon, West Virginia. [2] Her father was a cabinetmaker and her mother was a teacher. [citation needed] She attended West Virginia Wesleyan College and received an A.B. in 1925. She also attended Ithaca Conservatory. She earned her masters degree from Cornell University in 1930. While in Wesleyan College, she ...
The government has published Bowditch ever since. George Blunt died in 1878. Nathaniel Bowditch continued to correct and revise the book until his death in 1838. Upon his death, the editorial responsibility for The New American Practical Navigator passed to his son, J. Ingersoll Bowditch. Very few significant changes were made under him.
A cDNA library is a combination of cloned cDNA (complementary DNA) fragments inserted into a collection of host cells, which constitute some portion of the transcriptome of the organism and are stored as a "library". cDNA is produced from fully transcribed mRNA found in the nucleus and therefore contains only the expressed genes of an organism.
DNA and RNA are both capable of encoding genetic information, because there are biochemical mechanisms which read the information coded within a DNA or RNA sequence and use it to generate a specified protein. On the other hand, the sequence information of a protein molecule is not used by cells to functionally encode genetic information. [1]: 5
There are two distinctive mapping approaches used in the field of genome mapping: genetic maps (also known as linkage maps) [7] and physical maps. [3] While both maps are a collection of genetic markers and gene loci, [8] genetic maps' distances are based on the genetic linkage information, while physical maps use actual physical distances usually measured in number of base pairs.
In humans, mitochondrial DNA (mtDNA) forms closed circular molecules that contain 16,569 [4] [5] DNA base pairs, [6] with each such molecule normally containing a full set of the mitochondrial genes. Each human mitochondrion contains, on average, approximately 5 such mtDNA molecules, with the quantity ranging between 1 and 15. [ 6 ]