Dissimilation


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Dissimilation

 

in biology, the opposite of assimilation in the process of metabolism, consisting in the decomposition of organic compounds and conversion of protein, nucleic acids, fats, and carbohydrates (including those ingested) into simple substances. A number of dissimilation processes—respiration, fermentation, and glycolysis—play the central role in metabolism. As a result of these processes, energy contained in the molecules of complex organic compounds is released, partially to be transformed into adenosinephosphoric acids (chiefly ATP). The fundamental end products of dissimilation in all organisms are water, carbon dioxide, and ammonia. In animals these products are eliminated as they accumulate. In plant organisms CO2, partially, and NH3, totally, are used in the biosynthesis of organic matter, thus serving as the primary materials for assimilation.

The inseparable link between dissimilation and assimilation assures constant tissue renewal in organisms. Thus, in human blood one-half of the existing albumin is exchanged for new albumin molecules in ten days; the life span of erythrocytes is about four months. The relationship of the intensity of assimilation and dissimilation changes in relation to the stage of development, age, and physiological condition of the organism. The growth and development of the organism are characterized by the predominance of assimilation, which is manifested in the formation of new cells, tissues, and organs; their growth and differentiation; and in a general increase in body weight. In some pathological conditions and in starvation dissimilation usually predominates over assimilation, leading to a decrease in body weight.

S. E. SEVERIN and G. A. SOLOV’EVA


Dissimilation

 

in linguistics, one of the kinds of combinative sound changes in the course of speech. It occurs when one of two identical or similar speech sounds (adjacent or nonadjacent) changes to another distinct or less similar sound. Two examples of dissimilation are Latin peregrinum and Russian piligrim and Latinfebruaris and Russian fevral’.

References in periodicals archive ?
When it comes to the more productive trends, croswind exhibits the dissimilation tendency mentioned above: initially, this borrowing had undergone partial assimilation which manifested itself in the loss of the double consonant, a phenomenon relatively frequent in assimilated borrowings, cf., e.g., business > biznes (Manczak-Wohlfeld 1995: 44); however, nowadays it is recorded, especially on the Internet, in its English spelling with <ss>.
However, it can also support the scenario of a dissimilation process and of the lasting influence on the Rmet of ancient networks and technical specialisation that were once related to metal production.
It is worth mentioning that sugar dissimilation alone in the liquor during the pretreatment does not evaluate the process efficiency because it could be affected by the saccharification of the hexoses present, mainly in the cellulosic fraction, indicating the need of further enzymatic hydrolysis or characterization of the resulting solid fraction.
"Assimilation and Dissimilation: Tatars in Romania and Gagauz in Moldova." MA thesis, CEU Budapest, 2008.
The different translations of the Bible into Chinese have definitely helped the dissimilation and spread of the word of God, but there was little room for creative interpretation of the Bible cross-textually, as the text's doctrinal framework before it arrived on the shore of China largely dictated how the Bible should be understood.
Her topics are fortifying invisibility for empowerment in the face of disempowering structural invisibilities, epistemological and ethical issues around open methods for researching hidden populations, retaining minority identity while pretending to be part of the majority, externalizing Alevism from the Bulgarian Turkish group, Alevi Bulgarian Turks' self-perceptions of the Alevi ways, dissimulation as in-your-face disguise, and dissimilation and assimilation.
Okrent wrote, before explaining that it is the result of a process called "dissimilation", which is why we simply do not like to have two r's so close to each other.
Inspired by the aforementioned works, we also exploit the social forwarding path of vehicular network to analyze the nature of data dissimilation in the real trace based vehicular network.
Proctor, "Bacterial dissimilation of indoleacetic acid: a new route of breakdown of the indole nucleus," Nature, vol.
THE AMERICA OF OUR DAY is an engine of dissimilation, substantially as a result of government.
What is most important in Kreutzwald's T4, is also the general characteristic of the trochaic four-footed verse - here we can see the dissimilation of the indices of syllables of the second and the third duration between the even and odd positions: in even positions the second duration is preferred, in odd position the third.
"The Dynamics of Dissimilation: Ostjuden and German Jews." The Jewish Response to German Culture." From the Enlightenment to the Second World War, Ed.