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Tag: "minutes" at biology news

A gene's first 'kiss' sets off that affair known as puberty

...rmones from their childhood hibernation. Within 30 minutes of kisspeptin being administered to male monkeys, LH, one of the hormones stimulated by GnRH secretion, was no longer dormant, with levels 25-times higher than its baseline of zero. In addition to Dr. Plant, other authors of the PNAS paper are Muham...

The secret lives of whales

...ddle of the ocean basin where echoes take 10 to 20 minutes to return. “They must have the ability to process low-frequency sounds into images just as dolphins do with high frequency sounds, and they must have remarkable acoustic memories just as we have visual memories,?says Clark. Clark concludes that he a...

Why do insects stop 'breathing'? To avoid damage from too much oxygen, say researchers

... decades: why insects routinely stop breathing for minutes at a time. Challenging previous theories, researchers at UC Irvine and Humboldt University propose that insects such as grasshoppers, moths, butterflies, some types of fruit flies, beetles and bugs close off their respiratory systems periodically to...

Nano-Probes Allow an Inside Look at Cell Nuclei

...reen fluorescent proteins only fluoresce for a few minutes at a high resolution. These labels are also either toxic to cells or difficult to construct and manipulate. In the future, they hope to tailor quantum dots to track specific chemical reactions inside nuclei, such as how proteins help repair DNA afte...

Rats infected as newborns grew up vulnerable to memory problems during an immune challenge

...o explore a novel experimental chamber for several minutes on the first day. On the second day, each rat was placed back into the chamber and was shocked for two seconds and then put back in its home cage. After 24 hours, the researchers again put each rat in the experimental chamber and recorded whether the...

Vampire bats keep out of trouble by running

...while their prey are sleeping, spending perhaps 10 minutes drinking from the small cuts they make. However, running may help them avoid being stepped on, Riskin suggests. More likely, the researchers say, the ability to run evolved long ago, when vampire bats had to prey on faster South American athletes suc...

Nanoparticles offer new hope for detection and treatment

...could be "lit up" and easily located as soon as 30 minutes after the mice were injected with the nanoparticles. Because nanoparticles can be engineered to carry a variety of substances, they also may be able to deliver cancer-fighting drugs to malignant tumors as effectively as they carry the imaging materi...

Buying Time Through Hibernation on Demand

...e body temperature and metabolic activity. Within minutes of breathing the hydrogen sulfide and room-air cocktail, the mice stopped moving and appeared to lose consciousness, their respiration dropped from the normal 120 breaths per minute to fewer than 10 breaths per minute, and their core temperature drop...

U-M team recovers ancient whale in Egyptian desert

...e body temperature and metabolic activity. Within minutes of breathing the hydrogen sulfide and room-air cocktail, the mice stopped moving and appeared to lose consciousness, their respiration dropped from the normal 120 breaths per minute to fewer than 10 breaths per minute, and their core temperature drop...

Some Brain Cells 'Change Channels' To Fine-tune The Message

...cells are shocked with an electric current, within minutes the channels are replaced by ones made of GluR2 and GluR3. After the swap, sodium can still get in, but calcium is kept out. To learn more about how this takes place, the Hopkins researchers studied brain cells from genetically engineered mice. Thro...

A little stress gives beneficial oomph! to immune system

...ts showed that acute stress ?stress that lasts for minutes to hours ?temporarily mobilized all major types of immune cells, or leukocytes to potential battle stations in the body. In certain situations, this stress-induced boost in the number of immune cells may be advantageous, as leukocytes fight infection...

Master gene controls healing of skin in fruit flies and mammals

...ticle repair are activated very quickly, within 30 minutes after injury," said Joseph Pearson, a graduate student working under McGinnis and a coauthor of the paper. "They are activated over many cell diameters, most strongly at the boundaries of the wound, suggesting that the grainyhead gene initiates the c...

Thai spice helps cut blood sugar swings

...ormally absorbed rather quickly -- within about 20 minutes -- took over 2 hours after HCA ingestion. This delay is good because it reduces the high peaks of glucose, which otherwise would require the body to produce a lot of insulin to deal with the 'meal.' "Finding this delayed absorption is a completely n...

Whole-body MRI Takes Less Than 20 Min To Scan A Patient's Entire Body For Cancer Spread To Bone

... study, the whole-body MRI procedure took about 15 minutes total room time. They found that whole-body MRI detected 35 bone metastases, whereas whole-body FDG-PET discovered only 26. But MRI could only detect 63 of 68 lymph nodes, 15 of 19 soft-tissue tumors and 23 of 28 metastases in the internal organs, nu...

A probe, not an echo

...res. *Scans can be performed in a matter of a few minutes and because they are ultrasonic, they do not use potentially harmful ionizing radiation. *The system requires a minimum of special pre-scan procedures and appears likely, in clinical use, to be more comfortable for patients than alternatives. "The ...

Some Brain Cells Change Channels

...cells are shocked with an electric current, within minutes the channels are replaced by ones made of GluR2 and GluR3. After the swap, sodium can still get in, but calcium is kept out. To learn more about how this takes place, the Hopkins researchers studied brain cells from genetically engineered mice. Thro...

New miniaturised chip dramatically reduces time taken for DNA analysis

... the time needed to identify DNA chains to several minutes or a few hours, depending on each chain. These sensors can be applied to many different tasks, ranging from paternity tests and identifying people to detecting genetically modified food, identifying bacterial strains in foodborne illnesses and testin...

Discovery of New Dopamine Action May Yield Alternative Psychiatric Drugs

... slow modes: one that takes place over a period of minutes and a second -- newly discovered -- that lasts for...mine relays messages to the brain over a period of minutes has been well worked out. The new study by Caron and his colleagues reveals a second mechanism where...

Certain fish have a special mating preference

...er testing each individual and devoting over 1,000 minutes of observation, Langerhans found that it wasn't even close. "They chose the larger one over and over," Langerhans said. "All females had the same preference." A tenet of Langerhans's study was his belief that the gonopodium could be viewed as a seco...

IMF Launches World’s First DNA Database for Myeloma Patients

...er testing each individual and devoting over 1,000 minutes of observation, Langerhans found that it wasn't even close. "They chose the larger one over and over," Langerhans said. "All females had the same preference." A tenet of Langerhans's study was his belief that the gonopodium could be viewed as a seco...

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