Danielli Brown (24 results)

Hardcover. Condition: Good. Dust Jacket Missing. 300 pp. Ex-library book and has markings on inside pages and page ends. Solidly bound copy but show much wear along bottom right cover and page end -- has water stain and cover has been worn down to the cardboard. Solidly readable copy.

Condition: New.

Condition: New.

Condition: As New. Unread book in perfect condition.

Condition: New.

Hardback. Condition: New.

Condition: New. In English.

Condition: New.

Condition: As New. Unread book in perfect condition.

hardcover. Condition: LIKE NEW. Like new book in almost like new jacket. This is a green hardcover published in 1950 by Cambridge Univ Press and reprinted in 1967, 482pp + one plate. Book in perfect condition. Dust jacket has very minimal wear, spine slightly tanned.**We provide professional service and individual attention to your order, daily shipments, and sturdy packaging. FREE TRACKING ON ALL SHIPMENTS WITHIN USA.…

Condition: New. In English.

Condition: Very Good. vii, 290 pp; illustrations. Original cloth. Very Good. This copy does NOT have any library markings. First Edition. "Contains the papers read at a Symposium of the Society, which was held at Cambridge in July, 1946." One of the noteworthy papers is W. T. Astbury, "X-Ray Studies of Nucleic Acids" (pp. 66-76, with 2 plates and 1 text figure; see photos). To quote just one passage from this paper: "It seems improbable . . . to judge by the degree of perfection in the X-ray fibre diagram, that these four different kinds of nucleotides are distributed simply at random; rather must they follow one another in some definite order--at least, in more crystalline regions of the structure that give rise to the regular diffraction pattern. It is necessary to make this proviso, because in high-polymeric aggregates there is always the possibility that there are long portions of chains (or columns in this case) of sufficient regularity to build up crystallographically more perfect regions, while at the same time there occurs every so often some chemical peculiarity that might indeed confer specificity on a structure that is otherwise designed to perform some more standard function" (pp. 67-68). Kersten Hall, "William Astbury and the biological significance of nucleic acids, 19381951", Studies in History and Philosophy of Science Part C: Studies in History and Philosophy of Biological and Biomedical Sciences, Vol. 42, issue 2, June 2011, pp. 119-128.…

Hardback. Condition: New.

Hard covers, dust jacket. Condition: Good. Dust Jacket Condition: Fair. xix, 448 pp. Ex-library copy with stamps etc. Jacket frayed. Weight: 1 Language: English Symposia of the Society for Experimental Biology, no. 7.

Cloth. Condition: Very Good. Dust Jacket Condition: Good. lacking free front end paper. Ex-Library.

Hardcover. Condition: Very Good. No Jacket. 1st Edition. xix, 448 pp; illus. Original cloth. Very Good, without dust jacket. Other contributors include Haldane, Hinshelwood, Sheppard, Medawar, Danielli, et al. 'In his 1953(b) essay, 'Epigenetics and Evolution,' Waddington analysed the shortcomings of the population genetic account of evolution. . . . Waddington (1953b) claimed that the Modern Synthesis failed to work in at least three areas. First, much adaptation appeared to be non-genetic and regulated by the environment, not by the inherited genotype. Second, as Goldschmidt had noted, large groups of animals differ from each other in ways not compatible with local races branching off. Accumulations of small mutations in a local group could not separate amphibians from fish or reptiles from amphibians. Waddington noted that Goldschmidt's own hypotheses were so unconvincing to geneticists that they obscured the cogency of Goldschmidt's arguments for these 'unbridgeable gaps.' Third, Waddington noted the different rates of evolution seen in the paleontological record. Waddington (1953b, p. 190) concluded that "It is by paying further attention to the nature of the evolving animal, rather than to that of the environment, that we seem likely to make the most rapid progress in our understanding of evolution." He claimed that in conventional studies of evolution, the animal is considered either as a genotype (and is studied by geneticists) or as a phenotype (and is studied by taxonomists). What is needed, said Waddington, is an evolutionary study of those processes that get the genotype to the phenotypethe epigenetics of development. . . . Waddington (1953b, p. 191) then launched into a critique of the notion of 'random mutation,' noting that there are developmental constraints placed on what changes are possible. . . . Waddington distinguishes here normalizing selection working on adults and stabilizing selection working during development. . . . Waddington's notions of normalizing and stabilizing selection have become stabilized in our changing concepts of the roles of genes in evolution' (Scott F. Gilbert, 'Diachronic Biology Meets Evo-Devo: C. H. Waddington's Approach to Evolutionary Developmental Biology', American Zoologist, Volume 40, Issue 5, October 2000, pp. 729737).…

HRD. Condition: New. New Book. Shipped from UK. THIS BOOK IS PRINTED ON DEMAND. Established seller since 2000.

HRD. Condition: New. New Book. Delivered from our UK warehouse in 4 to 14 business days. THIS BOOK IS PRINTED ON DEMAND. Established seller since 2000.

Condition: New. Print on Demand.

Condition: New. Print on Demand.

Condition: New. PRINT ON DEMAND.

Condition: New. Print on Demand.

Condition: New. Print on Demand.

Condition: New. PRINT ON DEMAND.