Congenital and Hereditable Defects Which Interfere With The Reproductive Efficiency Of Domestic Cattle (Bos tarus)

The terminology concerning defects or abnormalities in cattle can render confusion if there is a not a distinction between the adjectives congenital and hereditable. The word congenital is derived from the Latin words con and genitalis. Con means with or together and genitalis means to beget or reproduction. Thus the word congenital describes those conditions which are present at birth as a result of the developmental process

Some Clinical Uses of Hormones in the Cow

The clinical use of hormones for the augmentation of fertility in the female is of practical importance. To the Livestock breeder, the value of his stock is measured by the production of offspring. It is essential that the veterinarian have an understanding of the complex hormonal control of the estrus cycle. This knowledge is necessary to understand possible variations in length and activities of the cycle and aids in the therapeutic use of hormone products

The influence of external factors on bacteriophages—review

The ability of bacteriophages to survive under unfavorable conditions is highly diversified. We summarize the influence of different external physical and chemical factors, such as temperature, acidity, and ions, on phage persistence. The relationships between a phage’s morphology and its survival abilities suggested by some authors are also discussed. A better understanding of the complex problem of phage sensitivity to external factors may be useful not only for those interested in pharmaceutical and agricultural applications of bacteriophages, but also for others working with phages