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Comparative biochemical studies in Sipunculus natans and Sipunculus multisulcatus (Sipuncula)
Abstract 1. 1. Chemical determinations were made in the coelomic fluid of S. natans and S. multisulcatus , data being presented for water, sodium, potassium, calcium, magnesium, phosphorus, sulphur,
Asexual repooduction in Glossobalanus crozieri (Ptychoderidae, Enteropneusta, Hemichordata)
The present findings indicate that, when compared to the results reported for other species, asexual reproduction in all ptychoderids (Balanoglossus, Glossobalanus and Ptychodera) follows the same general pattern.
Biochemical studies in a eunicid (Polychaete) of the littoral of São Paulo, Brazil.
The chemical composition of the mucus was determined and the pH was 6·49, a very low value, and the bicarbonate concentration estimated by the Henderson-Hasselbach equation was 4·70 mM/1.
Biochemical studies on the giant earthworm Glossoscolex giganteus (Leuckart).
Abstract 1. 1. The sodium, potassium, chloride, calcium, magnesium, inorganic phosphorus, sulphur, copper, bicarbonate, protein, urea, glucose, total lipids, copper oxidase activity, total iodine and
Accumulation of "glycogens" in the genital region of Balanoglossus gigas Fr. Müller (Spengel, 1893) (Enteropneusta) during reproduction.
Glycogen accumulates in the hepatic region of immature animals, and in all regions, except the intestinal region, in mature animals, while in the proboscis, collar, branchial, genital, hepatic and intestinal regions of the mature and immature animals.
Biochemical studies on the enteropneust Balanoglossus gigas (fr. Muller, 1898).
The skeleton of the enteropneust Balanoglossus gigas has high concentrations of calcium and copper and the mucus, faeces and skeleton was determined.
Sex differences and maturation influence on the chemical composition in Chaetopterus variopedatus Rénier 1804 (Polychaeta).
The iodine content of different regions and of several structures, including aliform notopodia and setae was also determined, a remarkable concentration of iodine being found in both of the structures mentioned above.
Iodine: Accumulation by Balanoglossus gigas
The whole body of the giant Brazilian enteropneust, Balanoglossus gigas, shows an accumulation of iodine, but theconcentration in the hepatic region is 854.7 percent higher than it is in the
Urea and uric acid contents in the hepatopancreas, kidney and lung of active and dormant snails, Strophocheilus and Thaumastus (Pulmonata, Mollusca)
During hibernation urea increases in the liver and lung of the two species, but in estivation the kidney of Strophocheilus looses urea, while Thaumastus accumulates it, and the lung of both species accumulates uric acid, while in the kidney the levels of this substance diminish in estivating.