species: cow

Gut Check: Polyamines in Human Milk Are Essential for Intestinal Maturation

Gut Check: Polyamines in Human Milk Are Essential for Intestinal Maturation

Putrescine, spermine, and spermidine may not have the most appetizing names, but these amino-acid derived molecules (called polyamines) are ingredients of all mammal milks. The presence of polyamines in milk is not surprising—putrescine, spermine, and spermidine are manufactured by all mammalian body cells, including mammary tissue. But polyamines are not accidental milk ingredients, passed on simply because they are ubiquitous in mammalian cells. Research from human and non-human animal models demonstrates that optimal nutrient absorption, the composition of the intestinal microbiome, and even food allergy may all depend on a sufficient supply of polyamines during the neonatal period. Milk polyamines, although odd in name, are essential for the proper maturation of the gastrointestinal tract in humans and other mammals. Read More...

Lessening the Gas Leak

Lessening the Gas Leak

A team of scientists from four continents has gathered evidence to demonstrate that it should be possible to cut methane emissions from dairy cattle without reducing how much milk they produce nor having to change the conditions in which they are kept. The answer is simply to add an ingredient to their feed. In tests lasting several months, this ingredient, 3-nitrooxypropanol known as 3NOP, cut methane emissions from Holstein dairy cows by about 30%. Achieving such a reduction in enteric methane output across the dairy industry would be a significant contribution to wider efforts to reduce greenhouse gas emissions. Read More...

The Energy Cost of Immune Cell Victory

The Energy Cost of Immune Cell Victory

Immune cells are strange beasts. Their favorite occupation, like a child nearing the end of a long summer vacation, is just hanging around looking for something to do. Usually, they just cruise the body in the blood, sometimes detouring into tissues seemingly just because they can. All is good. Read More...

Dairy Farmers Prefer Healthy Manageable Cows

Dairy Farmers Prefer Healthy Manageable Cows

Reaping the rewards of the genomic revolution in selective breeding in of dairy cows requires an informed and engaged dairy farmer response. A study published in December 2016 from a Danish group of dairy scientists reports that farmers rank health and management qualities above production traits in their cows. However, this ranking differs depending on whether the farmer is classified as organic or conventional. Read More...

The First Farmers: Where Did They Come From and Where Did They Go?

The First Farmers: Where Did They Come From and Where Did They Go?

Farming was a transformational technology that began the expansion of human populations and created settlements leading to the emergence of civilization. The origin of farming can be traced to the region known as the Fertile Crescent, which covered the area from modern Egypt around the eastern Mediterranean to Anatolia, the southern Caucasus mountains in the north, and the Euphrates and Tigris valleys in the east. Archaeologists have discovered evidence of early crop production from before 11,000 years ago and have traced the spread of agriculture in all directions from this region. One of the remaining questions is whether local hunter-gatherer populations across Europe and southern Asia learned about farming from afar and began their own farming culture, or whether Neolithic farmers migrated and brought agriculture and settlement with them. So, who were these ancient farmers, where did they come from, and where did their descendants emigrate? Read More...

The Bacterial Diversity in Raw Cow Milk During Its Transport and Storage

The Bacterial Diversity in Raw Cow Milk During Its Transport and Storage

Pasteurization helps make raw cow milk safe for human consumption, but it doesn’t get rid of all bacteria. These remaining bacteria can cause spoilage, thus affecting the shelf life and quality of milk products and leading to wastage. Knowing what bacteria are present in milk before and during milk processing could help identify sources of spoilage and find ways to get rid of them. Read More...

Dairy Protein Digestion: Life in the Slow Lane

Dairy Protein Digestion: Life in the Slow Lane

Foods traveling from the mouth to the intestines are a bit like drivers off to work on a four-lane interstate. Some foods get in the fast lane and are quickly digested, whereas others stay in the slow lane, taking longer to reach their final destination. Why some foods are speed demons and others Sunday drivers depends on the particular properties of the nutrients in the foods. For example, proteins take longer to break down in the stomach than do carbohydrates, and milk contains some of the slowest digesting proteins of all. What makes milk proteins such slow pokes? Read More...

Genomic Selection Accelerates Improvements in Health and Productivity of Dairy Cows

Genomic Selection Accelerates Improvements in Health and Productivity of Dairy Cows

The introduction of genomic selection into dairy cattle selective breeding programs has been greatly anticipated and is a remarkable example of the benefits of genomic technology. Made possible because the systems for selective breeding were already well developed in dairy, and the widespread use of artificial insemination meant that new developments could be delivered quickly. First introduced in the USA in 2008, there has now been sufficient time to generate enough data to assess its impact. Read More...

Automated Dairy Farming Gathers Momentum

Automated Dairy Farming Gathers Momentum

The Dairy Science Unit at The University of Sydney has been developing future dairy concepts and practices for over 10 years. Along with collaborators and partners in industry, the focus has moved from sustainable farming practices to the development of large herd, automated milking systems in pasture based settings, and increasingly expanded automation of dairy farming theme. This is a trend that is emerging in agriculture on a global scale, and dairy stands to benefit enormously from this revolution. Read More...

Medicating the Elderly with Night Milk

Medicating the Elderly with Night Milk

Elderly people often have trouble sleeping. For those afflicted, it’s more than mere annoyance: insomnia in old age is associated with a range of health difficulties. What’s worse, many medications that are commonly prescribed to elderly people only add to the problem—including beta blockers, which treat hypertension. This is because they lower the levels of a hormone called melatonin. Yet, melatonin levels can be increased by consuming foodstuffs that are rich in them. One key source is milk collected from cows in the middle of the night. Read More...