Nature Of Eggs Research Articles

Physical and chemical nature of eggs from six breeds of domestic fowl

1. The physical nature and chemical composition of the eggs from several breeds, White Leghorn, Rhode Island Red, Sussex, Maran, Dwarf Sussex and English Gamecock, have been studied. 2. The water content was highest in White Leghorn eggs, which were the heaviest. 3. Cholesterol content was similar in all eggs except for Dwarf Sussex in which it was less. 4. English Gamecock eggs contained a higher proportion of protein than those of the other breeds. 5. From the data presented, egg size, under similar conditions of feeding, does not determine the contents of components of the egg, but there are underlying genetic factors.

Paragonimus and Paragonimiasis

The arrangement of spines, the shape of ovary and testes, the nature of eggs, and the relative size of oral and ventral suckers are good criteria for differentiating adult Paragonimus species. This chapter discusses some the characteristics of the species of Paragonimus. The symptomatology and the sero-immunological diagnosis related to Paragonimus are also reviewed. A reliable diagnosis of paragonimiasis depends on the recovery of Paragonimus eggs from the sputum or faeces. The intradermal test, complement fixation test, and other serological tests are all supplementary diagnostic methods. However, the sero-immunological techniques are now playing an important role in the diagnosis of paragonimiasis, especially extrapulmonary paragonimiasis, in the evaluation of the therapeutic effect and in the differential diagnosis between the species of Paragonimus. The chapter also discusses the treatment of Paragonimus. Bithionol is the drug of choice for the treatment of pulmonary paragonimiasis, and is effective for the treatment of cutaneous paragonimiasis.

Contributions to the bionomics, anatomy, reproduction and development of the Indian house-gecko,Hemidactylus flaviviridis RÜPpel. Part I

The present paper is the introductory part of a series of studies made on the habits, anatomy and life-history of the Indian house-gecko,Hemidactylus flaviviridis Ruel. The more important points dealt with herein are as follows : (1) The systematic position of this lizard is reviewed, and the generally recognised definition of theSquamata criticised in the light of the more recent anatomical work. (2) The history of the institution of the genusHemidactylus and the speciesH. flaviviridis is concisely dealt with. (3) A resume of our knowledge of fossil lacertilians and Gekkonids is given. (4) A suitable cage devised for the keeping and rearing of geckoes has been described, and the method of incubating the eggs also dealt with. (5) An account of its general habits, food and feeding, sloughing, fidelity to particular sites in the house, caudal autotomy, regeneration, hibernation, age, etc., is given. (6) The breeding season is observed to commence generally in March and to continue for several months. (7) External differences between the two sexes are noted. It is found that two swellings on the ventral aspect of the tail make their appearance in the male during the breeding season. (8) The method of courtship and copulation has been described. (9) Observations are made on the size and nature of eggs, their fertilisation, intra-uterine development, incubation, hatching and many other related questions.