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Tag: "difference" at biology news

Targeted virus compels cancer cells to eat themselves

...lar self-cannibalization. The result was a huge difference in tumor volume among mice with subcutaneous malignant glioma that got hTERT-Ad and those that received a different, non-replicating virus. Average tumor size in the hTERT-Ad group was 39 cubic millimeters, while those receiving the other virus had a...

With record resolution and sensitivity, tool images how life organizes in a cell membrane

What's the difference between a lifeless sack of chemicals and a living cell? It's all in the way they're organized, according to Stanford biophysical chemist Steven Boxer. With colleagues at Stanford, the University of California-Davis and Lawrence Livermore National Lab...

Scientists use gene signatures to match cancer and other diseases with potentially effective drugs

... cell. The Connectivity Map system is based on the difference in gene activity patterns -- which genes are active, which are inactive -- in a disease cell compared with a normal cell, or a cell before it has been treated with a drug and after the drug has been administered. Usually there is a group of 100 or mo...

Thermal imaging shatters arousal gender gap myth

...sal between men and women, we see that there is no difference in the amount of time it takes healthy young men and women to reach peak arousal," said Dr. Irv Binik, psychology professor and founder and director of the Sex and Couple Therapy Service of Royal Victoria Hospital, which is part of the McGill Univers...

Results with newer bladeless LASIK equivalent to standard microkeratome LASIK

...s LASIK in the other eye. The researchers found no difference in subbasal nerve density between types of surgery...onths after surgery, yet the patients perceived no difference in vision after three months between their eyes treated with bladeless or microkeratome LASIK. Backs...

Study challenges myth that sex late in pregnancy hastens birth

...g sexually active women, combined with the lack of difference in delivery dates among the two groups, suggests that sexual intercourse has no effect on inducing labor, Schaffir said. He acknowledged that women who are more comfortable late in pregnancy may be more likely to engage in sexual activity, and that ...

New treatment for severe malaria

...is a development of heparin, and has the important difference of having no effect on normal blood coagulation. ...

Female birds boost up their eggs when hearing sexy song

...tural environments, in the experiment there was no difference in brood sex ratio between the different songs played to the females, which suggests different levels of female control. Male birdsong has long been known to attract females and influence mate choice decisions and even induce an alteration in the off...

Evolutionary forces explain why women live longer than men

...n live longer in almost every country, and the sex difference in lifespan has been recognized since at least the...ution and Human Adaptation Program, argue that the difference in life expectancy stems from the biological imperative of attracting mates. "This whole pattern i...

Pollutant haze heats the Arctic

...ths at a stretch during the long, dark winter. The difference is that here [in Salt Lake] the pollution source is local, whereas in the Arctic, the pollution source is from industry far away ?mostly from northern Europe and Eurasia." Garrett and Zhao used four years of measurements from the two sites to measur...

Salk scientists get to the root of plant cell fate

... aspects of their body plan." However, a critical difference between plants and animals in terms of polarity development is how much more tolerant plants are of manipulation. Long says, "In animals, early cell divisions are very important to development of polarity and if something goes awry with co-repressors...

Bone marrow may restore cells lost in vision diseases

...he retinal pigment epithelium, it could make a big difference in our visual health." Scientists were able to detect that RPE cells indeed appear to be naturally replenished in the test animals by transplanting bone marrow cells from normal male mice into albino females with two different types of acute RPE inj...

Choosy females make colourful males

...erent infection risks, which are associated with a difference in water depth and food choice. It is therefore in the females' interest to mate with their own males. Red and blue light Yet how did these differences evolve? The red species occurs in deeper water than the blue species and therefore experienc...

Joslin discovers signs of residual islet cell function in people with long-term type 1 diabetes

...ss to complications. There also was no significant difference in age, duration, age of onset or long-term glucos... daily insulin dose. The data shows no significant difference in clinical parameters for participants with or without c-peptide. For example, the average total ch...

Triple threat polymer captures and releases

...red from just an empty TGA pan, there was a slight difference versus those guests in the presence of either the ...en Thomas Professor of Chemistry, will measure the difference between those stable isotopes to help find where the guests are located relative to the host.. "We...

UCLA study finds same genes act differently in males and females

...gh levels." UCLA is the first to uncover a gender difference in gene expression in fat and muscle tissue. Earl...oduce an effect." "At the genetic level, the only difference between the genders is the sex chromosomes," said Drake. "Out of the more than 30,000 genes that ma...

Female guppies risk their lives to avoid too much male attention

...hers show that female guppies might use this color difference to their advantage, venturing into the deep water where predators lurk. The males' bright coloring also attracts predators, making it too dangerous for them to follow. "Understanding why and how [sexual segregation] occurs is essential if we are go...

Large dinosaurs were extremely hot in their day, UF study finds

...es for those reaching about 27 tons. This dramatic difference in body temperature between the largest and smalle...nces in how these species lived, because we know a difference of 18 degrees Fahrenheit results in a nearly 300 percent change in rates of population growth, lifes...

Scientists solve sour taste proteins

...ret the signals coming from the tongue to tell the difference between lemons and lemonade," Matsunami said. Future experiments using live animals as test models will be needed to answer remaining questions about taste sensation, he said. ...

HIV-1's high virulence might be an accident of evolution

...Heightened immune activation is the only clear cut difference between pathogenic and non-pathogenic infections w...eficiency viruses," Kirchhoff added. "The observed difference in Nef function may provide--for the first time--a mechanism to explain why many monkey species natu...

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