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Tag: "bottom" at biology news

Siberian lakes burp 'time-bomb' greenhouse gas

...," Walter said. "Now it is being released into the bottom of lakes, providing microbes a banquet from which they burp out methane as a byproduct of decomposition." "Permafrost models predict significant thaw of permafrost during this century, which means that yedoma permafrost is like a time bomb waiting ...

Taking 'chips' to the next level of gene hunting

...w double-capacity chips hold two layers of dots, a bottom layer that reads across and a top layer that reads... maps to the region of the genome contained in the bottom layer; likewise, if the experiment highlights a vertical row, the data correspond to the top layer. ...

Researchers make nanosheets that mimic protein formation

...is very exciting for assembling materials from the bottom up for a whole slew of applications ranging from drug delivery to energy," said Sharon Glotzer, professor of chemical engineering and materials science and engineering. Glotzer and Nicholas Kotov, associate professor of chemical engineering, and t...

Psst! Coffee drinkers: Fruit flies have something to tell you about caffeine

...tute of Basic Biomedical Sciences at Hopkins. "The bottom line is that our mutant flies willingly drink caffeine-laced liquids and foods because they can't taste its bitterness -- their taste receptor cells don't detect it." The Hopkins flies, genetically mutated to lack a certain taste receptor protein, h...

Buildup of damaged DNA in cells drives aging

...gnificant role in promoting the aging process. The bottom line is that avoiding or reducing DNA damage caused by sources such as sunlight and cigarette smoke, as well as by our own metabolism, also could delay aging," explained Dr. Niedernhofer....

Contrary to common wisdom, scientist discovers some mammals can smell objects under water

...eed video camera so that it pointed up through the bottom of a glass tank. Then he stuck various objects on the bottom of the tank ?pieces of earthworm, small fish, insect cuticle and blobs of wax and silicon ?and obser...

Researchers find protein that silences genes

... which acetylated amino acids are involved. "The bottom line is that HDA6 has very broad specificity. It can remove the acetyl groups from multiple histones and from multiple lysines of those histones" said Pikaard. When multiple acetyl groups are on the histones, the genes are turned on, Pikaard explai...

UN review shows need to halt destructive fishing practice

...tocks," the review said. The draft review called bottom trawling a particular concern, due to its tendency...me cases for interim steps such as a moratorium on bottom trawling until formal conservation and management systems can be set up. Nations have until Aug. ...

Structure determined for p53 tumor suppressor protein as bound to DNA for anti-cancer activity

...ate model of the p53 tetramer bound to DNA. "The bottom line is that we now have a detailed picture of how p53 binds DNA," says Ronen Marmorstein, Ph.D., a professor in the Gene Expression and Regulation Program at Wistar and senior author on the study. "Given the fact that p53 is an important tumor suppr...

Tiny airborne particles are a major cause of climate change

... warming. Policy makers have argued that, in the bottom line, the warming effect of the greenhouse gases and the (mainly cooling) aerosol effect may balance each other out so that the net global climate change will be small. Koren argues that it is the local climate change that is problematic: Clouds may ...

Ecologists home in on how sperm whales find their prey

...ular series of "clicks". When the whales reach the bottom of their dive, these clicks are emitted more often, eventually merging together to form "buzzes" of sound. This pattern reflects the whales homing in on cephalopods such as squid, with the buzzes reflecting the animals' final approach when detailed i...

Deep-water discovery

... the researchers to get an enticing glimpse of the bottom but until researchers make it to the seafloor in t...ed typical seafloor exploration to arriving on the bottom of the Grand Canyon at night with a flashlight and then attempting to ascertain the significance and...

Drug discovery team to explore newly discovered deep-sea reefs

...es typical seafloor exploration to arriving on the bottom of the Grand Canyon at night with a flashlight and then attempting to ascertain the significance and topography of the whole canyon based on small swaths revealed by the flashlight. The Miami AUV work has instead made it possible to choose dive sites...

Parasitic worms used to fight bowel disease

...rt efforts to learn how the treatment works. "The bottom line right now is that we know none of the mechanisms of how this works," she said. Mansfield, as well as other researchers, also wants to apply this effort to a variety of autoimmune conditions, such as asthma, diabetes and multiple sclerosis. Some...

Marine 'dead zone' off Oregon is spreading

...s have documented this year's region of low-oxygen bottom waters from Florence to Cascade Head," Chan said. ...each as far north as Kalaloch. Numerous species of bottom fish have been found dead on the beach south of the Quinault River in Washington. In Oregon, the mo...

DNA: Bacteria's survival ration

...ically, while bacteria would eat the rest from the bottom up. Nevertheless, Finkel said, DNA remains a backup nutrient for bacteria, being harder to digest than glucose and other simpler food sources. ...

Iron critical to ocean productivity, carbon uptake

...osphorus are nutrients that come up from the ocean bottom to feed the upper water column," Behrenfeld said. "Iron, on the other hand, can come from the deep or from the air, but it also enters the ocean through dust deposited by the wind. Windstorms blowing sand and dust off large deserts are a major source...

Ocean acidification threatens cold-water coral ecosystems

...opical coral reefs. Until now, scientists believed bottom trawling ?a commercial fishing method in which vessels drag large, heavily weighted nets across the bottom ?to be the greatest threat to cold-water corals. Now, however, a new study published in Frontiers i...

AIDS-related cognitive impairment exists in two separate forms

...e the 10-20 immortal stem cells that reside at the bottom of each crypt. The job of these stem cells is to r... crypts, and compared miRNA expression between the bottom tenth of the crypt, where the stem cells reside, and the upper 9/10s of the crypt. The difference in...

Markers of gene, protein, or micro-RNA activity predict outcome in prostate and colorectal cancers

...e the 10-20 immortal stem cells that reside at the bottom of each crypt. The job of these stem cells is to r... crypts, and compared miRNA expression between the bottom tenth of the crypt, where the stem cells reside, and the upper 9/10s of the crypt. The difference in...

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