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Tag: "medium" at biology news

Bioartificial kidney under study at MCG

...tions also can harm the kidneys. Even the contrast medium needed to study kidney function can be toxic. "I have seen healthy people on antibiotics for urinary tract infections develop renal failure; that's not uncommon, but it's most dreaded in the critically ill patient," Dr. Szerlip says. ...

Wisconsin scientists grow critical nerve cells

...es of mini-stages, each requiring a unique growing medium and precise timing. To start, the Wisconsin team generated neural stem cells from the embryonic stem cells. They then transformed the neural cells into progenitor cells of motor neurons, which in turn developed in a lab dish into spinal motor neuron ...

Current human embryonic stem cell lines contaminated UCSD/Salk team finds

... cells," said Gage."Also, components of the growth medium have the capacity to change theimmunological characteristics of the human ES cells. More research isneeded to understand the optimal conditions for preparing human cellsfor therapeutic application.""We considered that one partial solution to the prob...

UCSD researchers maintain stem cells without contaminated animal feeder layers

...be rather simple now to develop a specific defined medium that allows for the maintenance of the human stem cells and enhances research without the problem of contaminating animal cells and their products." In a summary to their paper, the researchers noted that "the identification of activin A as a key fa...

The BIOS Initiative - open source biotechnology is born

... establish, will allow the public-sector, small to medium enterprises and even large firms worldwide to explore new business models and begin a new era of transparent and cost-effective innovation in life sciences. The technologies include TransBacter, a new method for transferring genes to plants, and GUS...

UF Researchers Map Bacterial Proteins That Cause Tooth Loss

...proteins secreted by P. gingivalis when grown in a medium containing human gum cell proteins with the proteins produced by the bacteria when grown in a neutral medium. Bacterial proteins from the two conditions were separated using a new technique called Multidimensional Protein Identification Technology, o...

PCRM develops world's first cruelty-free insulin assay

...ement for the fetal calf serum used as a culturing medium in millions of medical tests every year. After mo... successfully incorporated antibodies grown in the medium into a test kit for human insulin. A report on the new methodology will be published soon in a peer...

Researchers devise way to mass-produce embryonic stem cells

... another chamber that holds fluid, or medium. This medium delivers chemical messengers, called cytokines, to the stem cells. The cytokines essentially tell the stem cells to stay in their undifferentiated state. The difference between growing stem cells in a flask vs. the bioreactor is that the cells grown...

Nature provides inspiration for important new adhesive

...be used in making softwood plywood, particleboard, medium density fiberboard, oriented strand board, and the laminated veneer lumber that is finding increasing use to replace conventional joists and beams in construction. Techniques have also been explored to create the new adhesives from tree bark or wood...

Human Eggs Can Develop From Ovarian Surface Cells In Vitro

...o 6 days in the presence of an estrogen-containing medium (phenol red) to stimulate their growth, the team was able to produce new human oocytes in vitro. The oocytes cultured in this way are viable and went on to successfully complete the first meiotic division to become mature human eggs -- capable of be...

Scientists succeed in cloning human embryos from eggs matured in the lab

...tes were artificially activated by incubation in a medium containing calcium ionophore, which enabled the injected nucleus to prepare for the first embryonic division. Mr Heindryckx said: "Eighteen out of the 25 in vitro matured MII oocytes survived this nuclear transfer. Of these, 11 showed the formation ...

Invitrogen Launches i-Path -- A Unique Systems Biology Platform at BIO 2005

...tes were artificially activated by incubation in a medium containing calcium ionophore, which enabled the injected nucleus to prepare for the first embryonic division. Mr Heindryckx said: "Eighteen out of the 25 in vitro matured MII oocytes survived this nuclear transfer. Of these, 11 showed the formation ...

Aptamer-based Biosensor screens Air Force personnel and equipment

...ance, "no threat" is green, a barely detectable to medium level of an agent is one or two yellow dots, and a high detection level is red. The biosensor system is designed to be reliable, disposable and cost-effective. The Air Force will continue testing the device over the next several months. ...

Visceral Leishmaniasis: Successful Vaccine Trial In Dogs

...re J.L. (1999). Leishmania Spp: completely defined medium without serum and macromolecules (CDM/LP) for the continuous in vitro cultivation of infective promastigote forms. Am. J. Trop. Med. Hyg., 60 (1), 41-50. Brevets : Lemesre J.L. (1993). "Procédé de culture in vitro de différents stades parasitaires ob...

Student scientists create living bacterial photographs

...ng in dishes of agar, a standard jello-like growth medium for bacteria. Like pixels on a computer screen switching between white and black, each bacterium either produced black pigment or didn't, based on whether it was growing in a light or dark place in the dish. The resulting images are a collection of...

Life in deadly conditions

...produce vitamins and amino acids. Thus, the growth medium for the culture of the single-celled organism could be significantly simplified. Dieter Oesterhelt explains that "the comparison with other halophile archaea we have studied shows that these organisms have a high plasticity with which they can adapt...

War on terror meets war on cancer

...re were four sets of flasks, each holding a growth medium containing water with a different ratio of oxygen-18 to oxygen-16. After the bacteria grew for three hours, the contents of each flask were sucked through a filter, leaving a pasty "cake" of bacterial cells with the consistency of wet flour. Water ...

Sperm stem cells closer to being like embryonic stem cells

...hroughs in this study was developing a new type of medium to grow the cells in, and another was the use of a genetically manipulated "tag" that specifically labeled germ cells with a green fluorescent protein, making the germ cells easier to identify when mixed with other cell types. "The rat testes conta...

Looking for the genes that affect a person's level of response to alcohol

...ny different genes, each contributing a small to a medium amount," said Hesselbrock. "What Dr. Schuckit has done is add another set of genes to that pool. It may be a small step, but that certainly doesn't diminish the importance of the finding." ...

Genes involved in biofilms

... second strategy arose during the development of a medium chemically defined in order to study how environmental signals affect the process of formation of the biofilm. Unexpectedly, most of the clinical strains of Staphylococcus aureus were unable to form biofilm in the synthetic medium, which suggested ...

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