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Tag: "medium" at biology news

Predators keep the world green, ecologists find

...ng contrast with this scenario of destruction, the medium islands presented a relatively normal appearance." Besides proving that the green world hypothesis is correct, Terborgh's team's results have important implications for the debate raging in many countries over reintroduction of top predators such as...

Stem cells from muscles can repair cartilage

...t develop into cartilage) depending on the type of medium in which they grew. The addition of transforming grown factor â1 (TGFâ1) to MDSC-B4 did not enhance chondrogenic differentiation. The authors conclude that skeletal muscle is a promising source of cells that can differentiate into cartilage-producin...

New journal article urges use of animal serum-free media for growing live cells

...reakthroughs permit the growth of human cells in a medium free of animal serum, enabling scientists and researchers to make cell culture safer and more humane. "Scientists have access to humane and scientifically superior alternatives, so now is the time to completely eliminate the use of fetal calf serum...

Study finds drug may cut down involuntary movements

...tive disorder that worsens as brain cells known as medium spiny neurons are killed off by a mutant protein. The disease brings with it an array of other difficulties as well, including cognitive problems, changes in personality, and psychiatric problems like depression. As many as one-quarter of patients ...

Behavioral studies show UV contributes to marsupial color vision

...lly distinct cone types, sensitive to short (SWS), medium (MWS), and long (LWS) wavelengths, is a common feature of Australian marsupials. However, since evidence of color vision cannot be derived from physiological studies alone, marsupial trichromacy remained to be established with an unequivocal behaviou...

Findings advance use of adult stem cells for replacement bone

... of having the stem cells create the proper growth medium themselves. The group, which included graduate student Quynh Pham and postdoctoral research associate Upma Sharma, accomplished this by seeding discs of titanium mesh with stem cells and encouraging them to form extracellular matrix, or ECM, the bone...

Strawberries by design

...original site and transferring it to an artificial medium for growth or maintenance. Here unfolded leaves, known as trifoliate leaves, are able to grow. When collected at 6-7 weeks after seed germination, these leaves are highly amenable to gene transfer using A. tumefaciens. Since they glow green under flu...

Wisconsin scientists grow two new stem cell lines in animal cell-free culture

...clinical reality by completely ridding the culture medium in which they are grown of animal products that co...new cell lines in completely defined conditions in medium that completely lacks animal products." Other groups, Thomson notes, have cultured established huma...

First direct mechanical communication of mitochondria, cardiomyocyte nucleus shown

...iment, the researchers found that in an artificial medium mimicking the cytosol, 10 micro-molar of valinomycin (a potassium ionophore that induces mitochondrial matrix swelling) decreased nuclear volume by a significant 12% ± 2%. And 150 micro-molar of diazoxide (a mitochondrial ATP-sensitive potassium chan...

How IVF could be causing genetic errors in embryos

... can be modified by the composition of the culture medium and oxygen concentration. "Interestingly, the expression of one gene, H19, was reduced regardless of the culture conditions, and as H19 is associated with Beckwith Wiedeman syndrome, this finding needs to be investigated further." However, he cauti...

Corn waste potentially more than ethanol

...inoculated with domestic wastewater and a nutrient medium containing glucose, the researchers report in the journal Energy and Fuels. Once established, the bacteria colonies were fed the sugary organic liquid obtained from steam exploding of corn stover. The researchers, who include Logan, Yi Zuo, Penn Sta...

Nanotechnology being used to improve biocompatibility of human prosthetics and implants

...ssolution of the Ca/P-rich phases into the culture medium might promote the proliferation/differentiation of the osteoblast cells. ...

Medium is the message for stem cells in search of identities

...shes, specific types of cells would arise. "The medium and the molecular environment influence the fate of the cell," said Dennis Steindler, Ph.D., executive director of the McKnight Brain Institute. "We simulated some events that occur while the brain is developing and challenged them with different env...

Birds going extinct faster due to human activities

...shes, specific types of cells would arise. "The medium and the molecular environment influence the fate of the cell," said Dennis Steindler, Ph.D., executive director of the McKnight Brain Institute. "We simulated some events that occur while the brain is developing and challenged them with different env...

Test reveals effectiveness of potential Huntington's disease drugs

.... It primarily attacks nerve cells called striatal medium spiny neurons, the main component of the striatum. Dr. Bezprozvanny's group previously demonstrated that Huntington's striatal neurons are oversensitive to glutamate, a compound that nerve cells use to communicate with each other. In the lates...

Chemical tests of cell growth enter third dimension

...ining many tiny wells. Each well contains a growth medium and some cells, and a protein that will cause growing cells to fluoresce. Researchers test a drug by adding it to a well. If the cells continue to fluoresce, that means that the cells are still reproducing, and the drug isn't effective at controlling...

Faster, more accurate tuberculosis test developed

... Mycobacterium tuberculosis grows faster in liquid medium than in solid medium; (2) TB grows in characteristic tangles or coils and these characteristic cord formations can be seen microscopically in liquid medium; and (3) the ability to incorporate drugs permits rapid and direct drug-susceptibility testing...

Cholera pathogen reveals how bacteria generate energy to live

...nzyme has to reach all the way from the water-like medium inside the cell, through the oily membrane interior, to the water-like environment outside the cell. For this reason, the enzyme is made up of water-soluble and oil-soluble components within a single entity, so it can’t hold its shape in any one sol...

Groundbreaking Canadian asthma study

...th, a routine procedure. physicians treat small to medium sized airways with Bronchial Thermoplasty (BT). The BT device generates radio frequency/thermal energy and reduces areas of underlying smooth muscle in the airways. The procedure is completed in three treatment sessions, each lasting less than one ho...

Fungal factories may save hemlock forests

...nd other funders. Whey is a far cheaper growing medium than those available in labs for the many fungi now in use as biological controls in agriculture and forestry. And the whey serves as a nutritional resource, making each droplet a cozy biological factory for a fungal colony, pumping spores out int...

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