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Tag: "poisonous" at biology news

An 'elegant' idea proves its worth 25 years later

...tion." Excess nitrogen yields ammonia, which is poisonous and in the case of urea cycle disorders, causes brain damage, retardation, coma and even death. Despite the immediate clinical success of the treatment, the drug combination was finally approved by the U.S. Food and Drug Administration only in 200...

Scientists find genes involved in the battle between Hessian flies and wheat

...o are under stress from toxic molecules, including poisonous oxygen compounds." Researchers know little abou...y larvae encounter defense mechanisms that include poisonous oxygen compounds, Shukle said. These compounds, also called reactive oxygen species, can be produced...

Vasectomy may put men at risk for type of dementia

...een these cells prevent blood-borne infections and poisonous molecules from entering the semen. After a vasectomy, however, the protective barrier is broken and semen mixes into the blood. The immune system recognizes the sperm as invading foreign agents and produces anti-sperm antibodies in 60 to 70 perce...

Illuminating the dark side of plants

...k contains vital information on a broad variety of poisonous and injurious temperate and tropical plants such as holly, poinsettia, and philodendron. It also includes common names, descriptions, species distribution, and information on the toxic part of each plant, and provides the latest medical information ...

Lead-'scrubbing' drug may also improve muscle function in lead-exposed children

...ich a drug is administered to seek out and bind to poisonous heavy metals, such as lead or mercury, in the bloodstream. The compound resulting from this binding is then excreted in the urine, essentially cleaning out the dangerous metals. Succimer (Chermet) is an oral chelating drug approved by the Food and...

Nonvenomous Asian snakes 'borrow' defensive poison from toxic toads

Most snakes are born with poisonous bites they use for defense. But what can non-poisonous snakes do to ward off predators? What if they could borrow a dose of poison by eating toxic toads, then recycling the toxins? That's exactly what happens in the relationship between an Asian ...

Ocean seep mollusks may share evolutionary history with other deep-sea creatures

...ow the crust. Although seep and vent fluids are a poisonous brew for most species, animals such as giant tube worms and the mollusks studied by Kiel and Little thrive with the help of the symbiotic bacteria. "If you can become adapted to living at these sites, you can make a very good living indeed," Little s...

Sandia research to focus on early detection of harmful algal blooms

... coastal region. Current methods for detecting the poisonous toxins characteristic of the blooms are cumbersome, require either expensive reagents or animal testing, or are unable to quantify toxins - critical information for managing shellfish beds. The technologies under development at Sandia would eliminate...

Gatekeeping: Penn researchers find new way to open ion channels in cell membranes

... Physiology at Penn ?screened venoms from over 100 poisonous invertebrate species to make this discovery. The enzyme, sphingomyelinase D (SMase D), splits a lipid called sphingomyelin that surrounds the channel embedded in the cell membrane. As a result, the channel opens to allow the passage of small ions ...

Cultural transmission in bats: When listening for dinner, bats learn from their neighbors

...novel (experimental) association of the calls of a poisonous toad species with the presence of palatable prey. ...groups, most bats did not approach the call of the poisonous species even after 100 trials. These results suggest that once acquired, novel prey-cue/prey-quality...

Hopkins researchers develop new tool to watch real-time chemical activity in cells

...t into the cell to do its work, and figure out how poisonous the chemical is to a cell. "Living cells are critical to our work because they show us how and what is actually happening in a normal context and time span when a chemical is added," says Jin Zhang, Ph.D., an assistant professor of pharmacology an...

Toxic molecule may cause most common type of muscular dystrophy

... have shown for the first time that getting rid of poisonous RNA (ribonucleic acid) in muscle cells can reverse... showed in our mouse model that when you make this poisonous RNA the mice get various aspects of myotonic dystrophy," Mahadevan said. "Then, when you take away t...

Stanford snake venom study shows that certain cells may eliminate poison

...28 issue of Science. Venom from three species of poisonous snakes and one species of honeybee were studied by a group led by Stephen Galli, MD, professor and chair of the Department of Pathology. Using mice, they analyzed how mast cells, a vital part of the immune system in mammals, reacted to the various ve...

'Biobullets' fight harmful mussels

...mall amounts of potassium chloride, a salt that is poisonous to most freshwater mollusks. Unlike other methods used to eradicate zebra mussels, such as chlorine, "biobullets" pose little or no threat to other marine animals, the researchers say, because they rapidly degrade and disperse in water. Since their ...

Poison dart frog mimics gain when birds learn to stay away

...protected from predators not by mimicking its most poisonous neighbor, but by looking like a frog who's poison packs less punch. The Texas biologists studied three species of poison dart frogs--one highly toxic species, one less toxic species and one harmless species. All live in the same area and are brightl...

Retinol for combating leukemia cells

.... 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 University research team analysed the effect of retinamide in certain types of leukemia - lymphoblastic leukemias. Nowadays, samples f...

Scientists develop a way to make the deadliest toxin known even more toxic

... said, "Since the botulinum neurotoxin is the most poisonous toxin known, finding a compound to activate it might seem somewhat counterproductive. But the range of clinical uses for the toxin have increased well beyond its cosmetic use--multiple sclerosis, stroke, cerebral palsy, migraine, and backache are jus...

Poison + water = hydrogen. New microbial genome shows how

...ding water, remove all the oxygen, mix in a bit of poisonous carbon monoxide, and add a pinch of hydrogen gas. ... on carbon monoxide. While consuming this normally poisonous gas, the microbe mixes it with water, producing hydrogen gas as waste. As the world increasingly c...

Plants have a double line of defence

...isms: for example, the structure of the cell wall, poisonous substances on the surface of the plant, or a lack of molecular entry sites for pathogens. But the researchers in Cologne have now shown that active immune responses make a key contribution to nonhost resistance ?for example, the transport of PEN2 to ...

Research team receives $7.5 million to study cassava

... toxic levels of cyanogens ?substances that induce poisonous cyanide production. "In Africa , improperly processed cassava is a major problem," Sayre said. "It's associated with a number of cyanide-related health disorders, particularly among people who are already malnourished." Sayre's laboratory focuses o...

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