Triploidy induction by heat-shock treatment in red tilapia

The possible use of sterile triploid red tilapia is an interesting option for culture due to their proliferating breeding activities. The aim of the present study was to investigate and optimize the time of heat-shock treatment to prevent second polar body extrusion from the newly fertilized eggs of red tilapia, to produce a maximum number of triploid individuals. Heat-shock treatment was applied at a temperature of 41 degrees C for a total duration of 3.5 minutes after 2, 3, 4, 4.5, 5 and 6 minutes of fertilization. The best survival rate (67.0) and triploid percentage (89.7) was observed for the treatment at 4 minutes after fertilization. It is thus successfully demonstrated that 4 minutes after fertilization was the most suitable timing of heat-shock treatment for second polar body retention in newly fertilized eggs of red tilapia

On rationality of longarithmic Q-homology planes - I

Consiglio Nazionale delle Ricerche (CNR). Biblioteca Centrale / CNR - Consiglio Nazionale delle RichercheSIGLEITItal

Pharmacognostical evaluation of Psoralea corylifolia Linn. seed

Psoralea corylifolia Linn. belonging to Fabaceae family is an important endangered plant that has been therapeutically used to treat different pathological manifestations since ages. It is commonly known as Bakuchi in Sanskrit. Though it is an important plant, till date, no pharmacognostical reports have been available on its seed. A lot of adulterations are also present in the market. The present study is aimed towards evaluating pharmacognostical and histochemical characteristics of the seeds of P. corylifolia Linn. in detail. Macroscopic and microscopic pharmacognostical characters of seeds and histochemical studies were noted by following standard methods. Pharmacognostical evaluation of seed shows the presence of volatile oil, silica deposits and stone cells. The observations found in current work can be considered as reference standards in future studies. Keywords: Bakuchi, Pharmacognosy, Psoralea corylifolia, Silica deposits, Stone cell