Tag: "freezing" at biology news

European common frog found to use novel mating strategy

... adjust to short breeding seasons and survive dry, freezing temperatures, Vieites, then at the Universidade de Vigo in Vigo, Spain, was surprised to see males embracing clutches. He and his colleagues spent two years in the field observing this behavior, and took tissue samples to test the paternity of the eg...

Israeli scientists reveal the plan of a key cellular machine

...o they could study them individually. Split-second freezing at very low temperatures allowed the scientists to view the spliceosome units in as close to a natural state as possible. From thousands of images, each at a slightly different angle, a composite 3-D structure of the spliceosome was built up. The r...

Study by Israeli scientists provides insight on DNA code

...o they could study them individually. Split-second freezing at very low temperatures allowed the scientists to view the spliceosome units in as close to a natural state as possible. From thousands of images, each at a slightly different angle, a composite 3-D structure of the spliceosome was built up. The r...

Patented process preserves transplant tissues/organs

...method to chill body tissues and organs well below freezing without forming ice crystals. The new process for ... refrigerator temperatures (approximately 4 C) and freezing has not been possible due to ice crystals, which damage delicate cells and greatly reduce the viabil...

Highlights of American Chemical Society national meeting in Philadelphia, Aug. 22-26

...mistry at ultra-low temperatures -- Although it's freezing in outer space, chemistry happens all the time. Stars are born, gasses collide and reactions are set in motion. Here on Earth, physical chemists are tapping new techniques -- including nano-helium droplets and altered electric fields -- to study chem...

Plumbing trees' plumbing reveals their engineering skill

... the plant is less likely to experience drought or freezing conditions which cause cavitation," said Jackson. "The surprise was the extent to which individual trees can make these developmental changes," he said. "There has long been data showing that roots tend to have larger conduits than shoots. But there ...

Design competition for new Antarctic Research Station

...complex will be self-sufficient, able to withstand freezing winter temperatures of around -30C and have minimal environmental impact on Antarctica's pristine environment. There is a growing risk that ice on which the UK's Halley Research Station sits could break off in the next decade. The new station will a...

Germans must research the history of reproductive medicine during the Nazi era

...an embryo before it is transferred to a woman; and freezing embryos for use at a later stage, which means that Germany has one of the higher rates of multiple births in Europe, because doctors have to transfer all the embryos they manage to create, regardless of the embryo's quality 40% of all ART births in ...

Noah's modern ark: The role of ART in conserving endangered species

...nging from artificial insemination (AI) and IVF to freezing sperm, eggs and embryos; but the challenges are very different. "Although we have benefited greatly from those scientists who study ART in humans and domestic or laboratory animals, we face different problems and it is clear that the high tech compon...

New laboratory model can be used to test new treatments for pediatric eye cancer

...d cryotherapy, which means killing cancer cells by freezing them. The main goal of these treatments is to save the eyes and, if possible, to avoid or delay radiation therapy. Unfortunately, in many cases, one or both eyes must be removed if other treatments fail. Effective drug therapy would greatly improve b...

Baby born from sperm frozen for record 21 years

..."This case report provides evidence that long-term freezing can successfully preserve sperm quality and fertil...ample of the safety and success of long-term sperm freezing and to help encourage young cancer patients to think positively about the future at a time when they...

Protein keeps cold fish from becoming frozen flounder, new study shows

...d temperatures as low as -1.9 degrees Celsius: the freezing point of sea water. The antifreeze plasma proteins...ciated with winter flounder only provides 0.7oC of freezing point depression, which in combination with blood solutes, only protects the fish down to -1.5 degre...

Research into cetacean reproduction leads to birth of killer whales by artificial insemination

...liquid-stored for up to three days or preserved by freezing and later thawed. Eight attempts at artificial insemination over the course of two years led to three pregnancies, one from thawed sperm and two from liquid-stored sperm. One male calf and one female calf were born. The third pregnant female, who di...

Kinase backgrounder: Iressa discovery part of major kinase project at Dana-Farber

...chers had the foresight several years ago to begin freezing patient tumor samples and "waiting for the day they had technology in hand to make these kinds of discoveries." Making "smart" drugs "It took 20 years from the time mutant kinases were discovered to the approval of Gleevec," says Dana-Farber's Thom...

The Hunter's Breath tells a story of adventure and discovery in Antarctica

...y loaf about on the ice or dive gracefully through freezing water to depths that would crush a human diver. Yet life is not easy in Antarctica, even for an animal so well adapted to its harsh environment. The researchers used an array of high-tech equipment to gain access to the hidden life of the...

Making the most of stem cells

... and labor intensive, but - because so few survive freezing - it may also mean that natural selection is alter..., genetic variability becomes less of an issue. By freezing the cells attached to a gel matrix instead of suspended in solution, and adding the chemical trehalo...

Freeze-dried sperm can fertilize rabbit oocytes

...erm. Even after being stored at temperatures above freezing for more than two years, the treated sperm were as capable as fresh sperm at fertilizing rabbit oocytes. In a paper scheduled for publication in Biology of Reproduction, the team headed by Xiangzhong Yang of the Center for Regenerative Biology at the...

Capturing cell protein production in action could help fight antibiotic resistance

... cellular process of interest. Also, the effect of freezing the sample before electron microscopy reduces radiation damage. This makes it possible to apply a higher electron dose, which gives a clearer image." To manufacture proteins, cells make a transcript of a gene's DNA. The template is then edited and s...

UN report: Accelerate global agreement to oversee exploitation of South Pole 'extremophiles'

...lates in some Antarctic fish, preventing them from freezing in their subzero environments. It was discovered i...fe of frozen food, improving surgery involving the freezing of tissues, and enhancing the preservation of tissues to be transplanted. A preliminary scan of the ...

Avoid bad memories: Targeting genes and drugs

... intensified signaling and attenuated the elevated freezing response, proving that the detected change was causally involved with the behavioral impact and paving the way toward developing novel treatment to traumatized patients....

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