substance 2 4

Tag: "substance" at biology news

Secrets of the sea yield stronger artificial bone

... in the investigational stages, variations of this substance could also be used in a myriad of applications in ...cate structure of nacre, which is a finely layered substance found in some mollusk shells, such as oysters and abalone. Scientists have long sought to duplicate ...

New weapon in battle against osteoporosis

...teoporosis". "We treated these mice with an active substance that bonds specifically to the CB2 receptor. In this way we were able to diminish the bone loss caused by ovary removal," explains the molecular biologist. Many patients carry a particular variant of the CB2 gene But how far can these results b...

Ancient fossil DNA found preserved in crystal

... ground up and treated with sodium hypochlorite ?a substance that removes all traces of organic matter ?the clusters of crystals remain intact and the organic material embedded in them is unaffected. Now, almost 20 years later, Weiner and Salamon have returned to these findings, reasoning that fossil bones mig...

A large step forward in the fight against African sleeping sickness

...ase disappear. There is every indication that this substance can also counteract Trypanosoma brucei rhodesiense in humans − sparing them from African sleeping sickness. ...

Scientists make first step towards 'holy grail' of crystallography

...the proteins to become crystals, researchers use a substance called a nucleant, which does this by encouraging ...tallise. They tested the theory using BioGlass, a substance developed by Imperial's material scientists, as a scaffold to trap and encourage the growth of prote...

AIDS drug from sunflowers

Sunflowers can produce a substance which prevents the AIDS pathogen HIV from reproduc...en pinned to what is known as 'DCQA'. However, the substance is only available in very small quantities and is thus extremely expensive. By using the Bonn method...

Retinol for combating leukemia cells

...etic retinoid, i.e. our body does not produce this substance naturally. Natural retinoids are used to treat various diseases (e.g. those of the skin) but they turn out to be quite poisonous in the doses required ?they are not well tolerated. This is why synthetic retinoids are created. Specifically, the Un...

Alternatives to the use of nitrate as a fertiliser

...responsible for the assimilation of ammonium, this substance is not modified in moderate concentrations in the pea but it is so in spinach. Regarding the main metabolic modifications, these take place in the roots in the case of the pea and in the leaves in the case of spinach. Moreover, in the roots of the pe...

Forsyth scientists gain greater understanding of how embryos differentiate left from right

...g ciliary, serotonergic (serotonin is the chemical substance involved in transmitting signals between neurons), and ion flow mechanisms. The data was strengthened by the operation of this mechanism through all three vertebrates. This is important because prior data was very fragmented and different asymmetry-...

Curry and cauliflower could halt prostate cancer

...thyl isothiocyanate (PEITC), a naturally occurring substance particularly abundant in a group of vegetables that includes watercress, cabbage, winter cress, broccoli, Brussels sprouts, kale, cauliflower, kohlrabi and turnips. "The bottom line is that PEITC and curcumin, alone or in combination, demonstrate sig...

New compound protects against liver cancer

...derived from oleanolic acid, a naturally occurring substance found in many plants. Other oleanolic derivatives are known to reduce tumor growth in animals and humans. Researchers believe CDDO-Im works by activating Nrf2, a master switch known to direct certain enzymes to stimulate the cell's defense mechanism...

Newly discovered protein kills anthrax bacteria by exploding their cell walls

...ti hopes to combine PlyPH with a non-toxic aqueous substance developed by a group in California that will germinate any anthrax spores it comes in contact with. As the spores germinate, the PlyPH protein will kill them, usually in a matter of minutes. The combined solution could be used in buildings, on transp...

Potential vaccine developed for deadly leishmaniasis disease

...ine manufacturers achieve this by adding a booster substance ?an adjuvant. The standard existing adjuvant, alum, has limitations. Potential alternative adjuvants are toxic, expensive or have other problems. Seeberger’s candidate vaccine combines the delivery vehicle, immune-stimulating antigen and adjuvant in...

Cholesterol gets 'thumbs up' for role in digit development

...ugh cholesterol has a bad rap as the sticky, fatty substance responsible for clogging arteries, Vanderbilt University Medical Center researchers recently found that the attachment of cholesterol to an important developmental protein controls the development of fingers and toes in mice. Without cholesterol, mic...

Cell therapy slows progression of an inherited neurological disease; Improves motor skills in mice

...ly begins early in life. In the disease, the fatty substance sulfatide accumulates in the brain due to the lack of an enzyme and causes loss of the white matter or myelin protecting nerve fibers. Without myelin, nerves cannot conduct impulses to and from other areas of the body, resulting in symptoms including...

Gene needed for butterfly transformation also key for insects like grasshoppers

...still have the large head and the stubby legs." A substance called juvenile hormone is present at each step of nymph development in insects that do not experience complete metamorphosis, and the researchers found that juvenile hormone correlates with the expression of the broad gene during the nymphal stage. ...

Growth hormone is made in the brain, report scientists

Scientists have found that growth hormone, a substance that is used for body growth, is produced in the brain, according to an article published in this week's Proceedings of the National Academy of Sciences. The researchers -- from three institutions –?found that growth hormone is produced within the h...

Human prostate grown from embryonic stem cells

... a human prostate, secreting hormones and PSA; the substance in the blood used to diagnose prostate disease," she said. Professor Gail Risbridger, Director of MIMR's Centre for Urological Research and leader of the research project, said the discovery will have a significant impact on prostate cancer and BPH ...

HIV/AIDS rates in Tijuana, Mexico increasing at alarming rate

...ess of HIV/AIDS and, for some, the need to turn to substance use and sex work to fill the perceived void ?all contributing factors that can lead to increased vulnerability to HIV infection. Although homosexual/bisexual men continue to be the groups most affected by HIV/AIDS in the border region, needle shar...

Environmental tobacco smoke linked to behavior problems in children and pre-teens

...f cotinine in the children's blood. Cotinine is a substance produced when nicotine is broken down by the body and can be measured in blood, urine, saliva and hair. It is considered the best available marker of environmental tobacco smoke exposure. Dr. Yolton found a relationship between cotinine levels and ...

1 2 3 4 5 6 7