The Relationship of Stage of Lactation, Pasturage and Environmental Temperature to the Degree of Unsaturation of Cow Milk Fat

A survey of 39 stanchion and parlor pipeline milkers in Pennsylvania indicates a considerable amount of rancid milk being produced on many of these farms. The majority of farms having installations with vertical risers were encountering this difficulty. The effect of stage of lactation seems to be a more important factor on the susceptibility of milk fat to lipolysis than variations between summer and winter feeding.

Download Full-text

Relationship between Temperament and Stage of Lactation, Productivity and Milk Composition of Dairy Cows

Animals ◽

10.3390/ani11071840 ◽

2021 ◽

Vol 11 (7) ◽

pp. 1840

Author(s):

Ramūnas Antanaitis ◽

Vida Juozaitienė ◽

Vesta Jonike ◽

Vytenis Čukauskas ◽

Danguolė Urbšienė ◽

...

Keyword(s):

Milk Fat ◽

Genetic Correlations ◽

Subclinical Mastitis ◽

Milk Composition ◽

Cow Milk ◽

Phenotypic Correlation ◽

Protein Ratio ◽

Stage Of Lactation ◽

Milk Urea ◽

Milk Performance

The aim of this study was to assess the relationship between temperament and milk performance in cows at different stages of lactation, describing their productivity, metabolic status and resistance to mastitis. This study showed that with increasing lactation, cows’ temperament indicators decreased (p < 0.001) and they became calmer. The highest temperament score on a five-point scale was found in cows between 45 and 100 days of lactation. In the group of pregnant cows, we found more cows (p = 0.005) with a temperament score of 1–2 compared with non-pregnant cows A normal temperament was usually detected in cows with lactose levels in milk of 4.60% or more and when the somatic cell count (SCC) values in cow milk were <100,000/mL and 100,000–200,000/mL, with a milk fat-to-protein ratio of 1.2. A larger number of more sensitive and highly aggressive cows was detected at a low milk urea level. In contrast to a positive phenotypic correlation (p < 0.05), this study showed a negative genetic correlation between the temperament of cows and milk yield (p < 0.001). Positive genetic correlations between temperament scores and milk somatic cells (p < 0.001) and milk fat-to-protein ratio (p < 0.05) were found to indicate a lower genetic predisposition in cows with a calmer temperament to subclinical mastitis and ketosis. On the other hand, the heritability of temperament (h2 = 0.044–0.100) showed that only a small part of the phenotypic changes in this indicator is associated with genetic factors.

Download Full-text

Analysis the relationship of physiological, environmental, and cow milk productivity using AI

2016 International Conference on Data and Software Engineering (ICoDSE) ◽

10.1109/icodse.2016.7936165 ◽

2016 ◽

Cited By ~ 1

Author(s):

Sugiono Sugiono ◽

Rudy Soenoko ◽

Debrina Puspita Andriani

Keyword(s):

Cow Milk ◽

Milk Productivity ◽

Relationship Of ◽

The Relationship

Download Full-text

The Relationship of Environmental Temperature to the Incidence and Outcome of Schizophrenia

The British Journal of Psychiatry ◽

10.1192/bjp.160.6.788 ◽

1992 ◽

Vol 160 (6) ◽

pp. 788-792 ◽

Cited By ~ 30

Author(s):

Sunjai Gupta ◽

Robin M. Murray

Keyword(s):

Pilot Study ◽

Environmental Temperature ◽

Climatic Variables ◽

Sociocultural Factors ◽

Outcome Study ◽

Daily Range ◽

The Mean ◽

Relationship Of ◽

The Relationship

This paper presents new analyses of data from two multicentre studies carried out by the WHO. The morbid risk of developing schizophrenia, as broadly defined by the Determinants of Outcome Study, was positively related to the mean daily range of temperature. The outcome of schizophrenia, as determined by the International Pilot Study of Schizophrenia, was found to be positively related to mean environmental temperature. Further studies are needed to examine the relationship of geographical and climatic variables to schizophrenia in order to complement what is already known about the role of sociocultural factors.

Download Full-text

Intramammary antibiotics in dairy goats : effect of stage of lactation, parity and milk volume on withdrawal periods, and the effect of treatment on milk compositional quality

Onderstepoort Journal of Veterinary Research ◽

10.4102/ojvr.v74i3.127 ◽

2007 ◽

Vol 74 (3) ◽

Cited By ~ 7

Author(s):

J. Karzis ◽

E.F. Donkin ◽

I.M. Petzer

Keyword(s):

Negative Correlation ◽

Milk Fat ◽

Animal Health ◽

Cow Milk ◽

Strong Positive Correlation ◽

Withdrawal Period ◽

Dairy Goats ◽

Positive Correlation ◽

Stage Of Lactation ◽

Moderate Negative Correlation

The length of the antibiotic withdrawal period after intramammary treatment was influenced by the milk yield of dairy goats during this trial. Shorter withdrawal periods were seen in relatively high yielding dairy goats (production above 1.5 ℓ per day) compared to low producers (less than 1.3 ℓ per day). High yielding goats treated with Curaclox LC (Norbrook [Pharmacia AH]) had a withdrawal period of 42 h, while low yielding goats, treated with the same product, had a withdrawal period of 74 h. The recommended withdrawal period for Curaclox LC for use in cattle is 72 h. Relatively high yielding goats treated with Rilexine 200 LC (Logos Agvet [Virbac]) had a significantly shorter withdrawal period (37 h) than that recommended for use in cattle (96 h). Low yielding goats treated with Spectrazol Milking Cow (Schering-Plough Animal Health) had a significantly longer (95 h) withdrawal period than that recommended for use in cattle (60 h). Withdrawal periods were also influenced by stage of lactation and parity. There was a moderate positive correlation between lactation number and withdrawal period, as measured by TRIS (R2 = 0.621), and a moderate negative correlation between stage of lactation and withdrawal period (R2 = -0.669). In Trials 1, 2 and 3 combined there was a moderate negative correlation between withdrawal period and volume (R2 = -0.511) and a strong positive correlation between withdrawal period and lactation number (R2 = 0.720). The differences in percentage milk fat, protein and lactose before, during and after treatment were not statistically significant except in Trial 3 (Curaclox LC and Rilexine 200 LC) where protein and lactose differed significantly. In Trial 2 (Spectrazol Milking Cow) milk fat percentages differed significantly between treatment and control groups as did protein percentages in Trial 3. These differences are however, not biologically meaningful.

Download Full-text

Differential Somatic Cell Count as a Marker for Changes of Milk Composition in Cows with Very Low Somatic Cell Count

Animals ◽

10.3390/ani10040604 ◽

2020 ◽

Vol 10 (4) ◽

pp. 604 ◽

Cited By ~ 3

Author(s):

Alfonso Zecconi ◽

Francesca Dell’Orco ◽

Diego Vairani ◽

Nicoletta Rizzi ◽

Micaela Cipolla ◽

...

Keyword(s):

Somatic Cell ◽

Cell Count ◽

Milk Fat ◽

Somatic Cell Count ◽

Milk Composition ◽

Cow Milk ◽

Udder Health ◽

Lactating Cows ◽

Accuracy Of Measurements ◽

The Relationship

The recent availability of a high-throughput milk analyzer performing a partial differential somatic cell count (DSCC) opened new opportunities in investigations on bovine udder health. This analyzer has a potential limitation on the accuracy of measurements when the somatic cell count (SCC) is below 50,000 cells/mL, values characterizing a good proportion of lactating cows in many herds. We obtained data for cows below this threshold, assessed the repeatability of these measurements and investigated the relationship between DSCC and udder health, milk composition and yield. Overall, 3022 cow milk test records performed on a Fossomatic™ 7/DC (Foss A/S, Hillerød, Denmark) were considered; 901 of them had an SCC ≤ 50,000 cells/mL. These latter samples were analyzed by qPCR to identify the presence of bacteria. Overall, 20.75% of the samples (187) were positive. However, the health status did not have any significant association with DSCC. The analysis of the association of DSCC on milk fat, protein and casein showed a significant decrease in their proportions as the DSCC increased, whereas it was not observed for milk yield and lactose. Therefore, DSCC in very low SCC cows may be suggested as a marker to identify early changes in milk composition.

Download Full-text

An Inline Reticulorumen pH as Biomarker of Cow’s Reproduction and Health Status

10.20944/preprints202001.0096.v1 ◽

2020 ◽

Author(s):

Ramūnas Antanaitis ◽

Vida Juozaitiene ◽

Dovilė Malašauskienė ◽

Mindaugas Televičius

Keyword(s):

Health Status ◽

Milk Fat ◽

Blood Parameters ◽

Blood Gas ◽

Protein Ratio ◽

Time Body Weight ◽

Blood Gas Parameters ◽

Relationship Of ◽

The Relationship ◽

Blood Gas Analyzer

We hypothesized possibility that inline registered reticulorumen pH can be as biomarker of cows reproduction and health status. Aim of this study was to evaluate the relationship of reticulorumen pH with biomarkers from automatic milking system (AMS) and some blood parameters and determinate reticulorumen pH as biomarker of cows reproduction and health status. According to cows reproductive status the cows were classified as belonging to the following four groups: 15-30 d. postpartum; 1-34 d. after insemination; 35 d. after insemination (non-pregnant); 35 d. after insemination (pregnant). According reticulorumen pH assay experimental animals were divided into four classes: 1) pH<6.22 (5.3% of cows), 2) pH - 6.22-6.42 (42.1% of cows), 3) pH - 6.42-6.62 (21.1% of cows), 4) pH >6.62 (10.5% of cows). Rumination time, body weight, milk yield, milk fat – protein ratio, milk lactose, milk somatic cell count (SCC), milk electrical conductivity of all quarters of udder were registered with the help of Lely Astronaut® A3 milking robots. The pH, temperature of the contents of cow reticulorumens and cow activity were measured using specific smaX-tec boluses. Blood gas parameters were analyzed using a blood gas analyzer (EPOC, Canada). We found that pregnant cows has higher reticulorumen pH during insemination time, comparing with non-pregnant. Cows with lower reticulorumen pH has lowest milk fat – protein ratio, and lactose concentration, and highest SCC. Cows with lowest reticulorumen pH has lowest blood pH. With increase reticulorumen pH, increases blood potasium and hematocrit, decreases CO2, saturation and sodium.

Download Full-text

Study Temperature and Humidity Influence on High-Power IGBT

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.325-326.499 ◽

2013 ◽

Vol 325-326 ◽

pp. 499-502

Author(s):

Bing Yang Luo ◽

Yi Min Mo ◽

Wen Lu Zhang ◽

Si Ning Liu

Keyword(s):

Failure Rate ◽

High Power ◽

Environmental Temperature ◽

Igbt Modules ◽

Environment Temperature ◽

Temperature And Humidity ◽

Four Quadrant ◽

Relationship Of ◽

The Relationship ◽

Humidity Monitoring

This paper has made a statistic survey on the failure rate of the appliance of high-power IGBT on the Harmonious locomotive. According to the analysis ,environmental temperature and humidity have a crucial influence on failure rate, thus a set of temperature and humidity monitoring system has been designed to investigate the environment temperature and humidity of high failure rate Four-quadrant IGBT modules, analyzing factors such as temperature and humidity and the working conditions accordingly, exploring the relationship of rising temperature of IGBT ,locomotive speed ,pressure of the air cylinder, setting a foundation for later analysis on the mechanism of troubles.

Download Full-text

623. Variations in the incidence of udder infection and mastitis with stage in lactation, age and season of the year

Journal of Dairy Research ◽

10.1017/s0022029900008177 ◽

1956 ◽

Vol 23 (2) ◽

pp. 181-193 ◽

Cited By ~ 36

Author(s):

J. Oliver ◽

F. H. Dodd ◽

F. K. Neave ◽

G. L. Bailey

Keyword(s):

Infection Rate ◽

Clinical Symptoms ◽

Significant Rise ◽

Early Lactation ◽

Health Records ◽

Udder Health ◽

Stage Of Lactation ◽

Relationship Of ◽

The Relationship ◽

Marked Tendency

1. The detailed udder health records of 530 lactations have been analysed on a monthly and lactation basis, so that separate studies of the first infection rate, re-infection rate, total new infection rate and total infection and mastitis incidence for both cows and quarters could be made. These data have been used to study the relationship of stage of lactation, age and season of the year with udder infection and mastitis.2. With advancing lactation there was a decline in the rate of first infection, reinfection, total new infection and in mastitis in infected cows and quarters.3. In early lactation there was a marked tendency for infected cows and quarters to develop clinical symptoms.4. During the last 4 months of lactation there was no significant rise either in infection or in mastitis.5. There was an increase in infection and mastitis with advancing age, but infected older cows were not more liable to develop clinical symptoms than younger cows.6. There was an indication that the longer a quarter was free from infection the greater were its chances of remaining so.7. No major seasonal trends were found in the incidence of udder infection and mastitis, although the incidence was slightly higher in the summer months.

Download Full-text