OBJECTIVES To analyze the effects of exposure to cigarette smoke during gestation and lactation on the milk production of rats and on the weight gain and linear growth of their offspring. METHODS Three groups of female rats were studied during gestation and lactation: 15 rats were exposed to cigarette smoke and air flow, 18 rats were handled, i.e., exposed to compressed air flow, and 18 rats ...

Experiments were designed to investigate the suitability of a combination of a short manual teat stimulation with a short latency period before teat cup attachment to induce and maintain oxytocin release and milk ejection without interruption. In Experiment 1, seven dairy cows in mid lactation were manually pre-stimulated for 15, 30 or 45 s, followed by either 30 s or 45 s of latency period. It...

Mastitis is one of the most important diseases of dairy cattle in the world. The identification and characterization of the constituent proteins in milk can be useful for studying the biochemistry and pathogenesis of mastitis. In this study, the electrophoretic patterns of milk from 10 healthy and 30 mastitic cows were studied. All of the latter milk samples were California Mastitis Test (CMT) ...

Mixed model analysis of data from 32 studies (122 diets) was used to evaluate the precision and accuracy of the omasal sampling technique for quantifying ruminal-N metabolism and to assess the relationships between nonammonia-N flow at the omasal canal and milk protein yield. Data were derived from experiments in cattle fed North American diets (n=36) based on alfalfa silage, corn silage, and c...

A facile method has been developed to detect pathogenic bacteria using magnetic nanoparticle clusters (MNCs) and a 3D-printed helical microchannel. Antibody-functionalized MNCs were used to capture E. coli (EC) bacteria in milk, and the free MNCs and MNC-EC complexes were separated from the milk using a permanent magnet. The free MNCs and MNC-EC complexes were dispersed in a buffer solution, th...

Transcutaneous Doppler ultrasound measurements were made of the superior mesenteric artery of 22 preterm infants (mean birth weight 600-2580 g) to investigate the response of intestinal blood flow to feeding. Analysis of the data in relation to milk intake showed a significant change in peak velocity and mean velocity; peak velocity before feeding increased from a mean baseline value of 34 cm/s...

A new type of spray dryer was developed for drying milk and the like efficiently. To this end, freely rotatable propellers powered with air-flow were placed in chamber to increase thermal efficiency product yield newly dryer. Milk samples dried both system a standard compare efficiencies yields each. It observed that had caused change flow direction air, decreased temperature walls, increased d...

mastitis is one of the most important diseases of dairy cattle in the world. the identification and characterization of the constituent proteins in milk can be useful for studying the biochemistry and pathogenesis of mastitis. in this study, the electrophoretic patterns of milk from 10 healthy and 30 mastitic cows were studied. all of the latter milk samples were california mastitis test (cmt) ...

The milking unit can be detached at a milk flow rate of 400 g/min without having a negative effect on milk yield. Machine-on time is shortened and teat condition improved, and udder health does not seem to be affected. The threshold may be set even higher for cows milked more than twice daily. It is recommended that specific setting of switch points and delay times are evaluated for each farm. ...