Volume 60, Issue 4
October 1964, pages 241-298
pp 241-248 October 1964
pp 249-263 October 1964
Under control conditions of the laboratory, the rates of oxygen consumption, locomotor activity and feeding show a diurnal rhythm. It appears that light plays only a minor role in the production of this rhythm in the juvenile Atlantic salmon.
pp 264-272 October 1964
1. The right anterior wall of the atrium dextrum is smooth and non-muscular and represents the remnant of the sinus wall which has been incorporated in the atrium.
2. The atrium dextrum is divided into two parts by a horizontal partition. The muscular strands of the atrium dextrum do not form acrista terminalis.
3. S-A node, A-V node and A-V bundle are absent.
4. The atrial septum and the walls of the two atria have Purkinje fibres.
5. In the left ventricle, a muscular papilla originating from the posterolateral wall of the ventricle runs parallel to the ventricular septum. This muscular papilla is connected anteriorly with a posterior extension of the left atrial wall and the atrial septum.
6. A ‘moderator band’ in the left ventricle has been described.
7. Vestige of ductus arteriosus persists.
8. A coronary artery has been noted springing from the aorta at its origin near the atrioventricular junction.
pp 273-280 October 1964
The utilization of sucrose, maltose, lactose, and raffinose byAspergillus ustus (Bainier) Thom and Church,A. flavipes (Bainier and Sartory) Thom and Church,A. carneus (van Teigh) Bloch., andA. amestelodami (Mangin) Thom and Church was studied. The culture solutions were analysed by circular paper partition chromatography to detect the presence of various sugars formed in the medium during the period of incubation. Except for lactose, all the oligosaccharides were utilized through an indirect pathway and almost all proved to be good sources of carbon for the fungi tested. Most of the species converted maltose by transglycosidation into two new oligosaccharides,viz., maltotriose and maltotetraose with simultaneous liberation of glucose. During the utilization of raffinose, melibiose and fructose were detected in the culture media of all the Aspergilli. Melibiose was further broken down to glucose and galactose byA. carneus andA. amestelodami.
Except for lactose all four moulds showed greater vegetative growth on filter-sterilized oligosaccharides than on autoclaved sugars. In the case of lactose the reverse was found to be true. In this case it is likely that autoclaving promoted partial hydrolysis of the disaccharide.
pp 281-286 October 1964
The following amino-acids have been detected in the healthy and the diseased tissues of sandal (green foliage): alanine, arginine, aspartic acid, cysteine, glutamic acid, histidine leucine, isoleucine, lysine, methionine, ornithine, phenylalanine, proline, hydroxy proline, serine, threonine, valine and α-aminobutyric acid.
Quantitative estimations have been made of alanine, aspartic acid and glutamic acid as also those of the corresponding ketocarboxylic acids, namely, pyruvic, oxalacetic and α-ketoglutaric acids which are involved in the aminoacid and carbohydrate metabolisms, respectively. Distinct differences have been noticed in regard to the quantities of these acids present in the healthy and diseased tissues and their significance has been discussed.
pp 287-292 October 1964
The right optic nerve ofDanio rerio (Ham.) was severed without disturbing the regular course of the blood. The outer sheath of nerve was, however, only punctured so as to make the accurate approximation and to help and guide the regenerating nerve fibres before the lens and the retinal elements had time to degenerate. Return of vision was restored in twenty-four out of ninety fishes operated upon. The tests for the restoration of the vision,viz., dropping of food particles and the optokinetic reactions with the eye movements were carried out. Histological check-ups at different stages of regeneration were performed and the picture thus obtained of the regenerating nerve fibres has been discussed at a great length.
pp 293-297 October 1964
Results of experiments during three consecutive seasons on the rôle of blue-green algae in combination with partial soil sterilization and chemical nutrients indicate high responses to algae inoculation and a fertility build-up of the soil. It is also seen that blue-green algae tend to produce better response in soils which are poor.
pp 298-298 October 1964 Erratum