Spleen, chemical composition

Chemical Composition of Horse Spleen Ferritin Iron Cores"... 

Insect pest infestation causes losses in quantity and quality of food commodities and changes in chemical composition, affecting the nutritive value of the produce (Howe, 1965 Scott, 1991 Swaminathan, 1977). Insect activity also leads to contamination of the produce (Table II). The flour beetles (Tribolium spp.) contaminate foodstuffs with their secretions, which contain 2-ethyl 1,4-benzoquinone and 2-methyl-1,4-benzoquinone. T. castaneum quinone secretions not only impart off-odors to food commodities but are also considered to cause liver and spleen tumors in mice (El-Mofty et al., 1992). However, Hodges et al. (1996) demonstrated that unlike in wheat flour, the accumulation of quinone secretions of T. castaneum adults in rice was negligible at less than 1 ppm, and hence, they claimed that T. castaneum infestation in rice is not likely to be a health risk. Males of R. dominica secrete aggregation pheromones (dominicalures) that contribute to the characteristic sweetish or musty odor in grain infested with R. dominica (Khorramshahi and Burkholder, 1981). However, Seitz and Sauer (1996)... 

Table 3. Chemical composition of spleen in Gaucher s disease...

The tetracyclines are a group of antibiotics with the same basic chemical structure they are derivatives of the naphthacene ring system. Compounds of the series differ in the composition of the side chains (Fig. 1). These antibiotics derived from different Streptomyces species show closely related spectra of bacteriostatic properties, with the exception of minocycline, which is very effective against most Staphylococcus strains resistant to other tetracyclines. Absorption, metabolism, and excretion of the different tetracyclines vary, however. After oral application, tetracycline, oxytetracycline, and chlortetracycline are absorbed to a much lesser degree than demethylchlortetracycline, methacycline, or the almost entirely absorbed minocycline. Maximum blood levels are found 2-6 h after oral intake and immediately in the case of intravenous infusion. Half-lives between 8 and 15 h were reported. The tetracyclines diffuse readily across the vascular barrier and are found in various tissues such as the liver, spleen, bone marrow, kidney, skin, and lungs as well as the peritoneal and pericardiac cavities. The tetracyclines are also able to... 

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