Skip to Content

RSS 总计

Dune ecosystem modelling

Plants & Animals - 星期五, 06/23/2017 - 22:06
Acacia longifolia, which is native to Australia, is a species which was cultivated in Portugal primarily to stabilize dunes and as an ornamental plant; now it has spread out uncontrollably in Portugal and into many ecosystems around the world. Using the acacia as an example, researchers show that the location has an effect on interaction with other species.
分类: ScienceDaily

Turtle 'go-slow zone' extensions needed

Earth & Climate - 星期五, 06/23/2017 - 22:04
Marine scientists are calling for an extension of go-slow zones in turtle habitats to reduce boat strikes on the threatened creatures.
分类: ScienceDaily

Turtle 'go-slow zone' extensions needed

Plants & Animals - 星期五, 06/23/2017 - 22:04
Marine scientists are calling for an extension of go-slow zones in turtle habitats to reduce boat strikes on the threatened creatures.
分类: ScienceDaily

Lowering health risks of cannabis use with new public health guidelines

Plants & Animals - 星期五, 06/23/2017 - 22:04
Canada's Lower-Risk Cannabis Use Guidelines, released with the endorsement of key medical and public health organizations, provide 10 science-based recommendations to enable cannabis users to reduce their health risks. The guidelines are based on a scientific review by an international team of experts.
分类: ScienceDaily

Impact of seismic surveys on zooplankton

Earth & Climate - 星期五, 06/23/2017 - 22:04
Marine seismic surveys used in petroleum exploration could cause a two to three-fold increase in mortality of adult and larval zooplankton, new researc has found. Scientists have studied the impact of commercial seismic surveys on zooplankton populations by carrying out tests using seismic air guns in the ocean off Southern Tasmania.
分类: ScienceDaily

Impact of seismic surveys on zooplankton

Plants & Animals - 星期五, 06/23/2017 - 22:04
Marine seismic surveys used in petroleum exploration could cause a two to three-fold increase in mortality of adult and larval zooplankton, new researc has found. Scientists have studied the impact of commercial seismic surveys on zooplankton populations by carrying out tests using seismic air guns in the ocean off Southern Tasmania.
分类: ScienceDaily

Tipping points are real: Gradual changes in CO2 levels can induce abrupt climate changes

Earth & Climate - 星期五, 06/23/2017 - 22:04
During the last glacial period, within only a few decades the influence of atmospheric CO2 on the North Atlantic circulation resulted in temperature increases of up to 10 degrees Celsius in Greenland -- as indicated by new climate calculations.
分类: ScienceDaily

Plants sacrifice 'daughters' to survive chilly weather

Plants & Animals - 星期五, 06/23/2017 - 20:50
Plants adopt different strategies to survive the changing temperatures of their natural environments. This is most evident in temperate regions where forest trees shed their leaves to conserve energy during the cold season. In a new study, a team of plant biologists found that some plants may selectively kill part of their roots to survive under cold weather conditions.
分类: ScienceDaily

Protein mingling under blue light

Plants & Animals - 星期五, 06/23/2017 - 20:50
One of the current challenges in biology is to understand rapidly-changing phenomena. Interestingly, only a small fraction of them is due to proteins acting in isolation, the majority of biological events are regulated by proteins acting together in clusters. Researchers have developed a new tool, called "CRY2clust", to trigger protein cluster formation in response to blue light. This new technique has a much faster response rate and higher sensitivity to light than existent methods.
分类: ScienceDaily

How a single chemical bond balances cells between life and death

Plants & Animals - 星期五, 06/23/2017 - 06:28
With SLAC's X-ray laser and synchrotron, scientists measured exactly how much energy goes into keeping a crucial chemical bond from triggering a cell's death spiral.
分类: ScienceDaily

Snake fungal disease identified in wild British snakes for first time

Plants & Animals - 星期五, 06/23/2017 - 03:32
Europe's wild snakes could face a growing threat from a fungal skin disease that has contributed to wild snake deaths in North America, according to an international collaborative study.
分类: ScienceDaily

Seafood poisoning bug thwarts a key host defense by attacking the cell's cytoskeleton

Plants & Animals - 星期五, 06/23/2017 - 03:32
The leading cause of acute gastroenteritis linked to eating raw seafood disarms a key host defense system in a novel way: It paralyzes a cell's skeleton, or cytoskeleton.
分类: ScienceDaily

How pheromones trigger female sexual behavior

Plants & Animals - 星期五, 06/23/2017 - 02:31
A new study showed how a male pheromone in mice enhances sexual behaviors in females -- and how it may enhance a different behavior, aggression, in males -- by identifying distinct neural circuits and neurons that generate a particular behavioral response to specific chemical signals. The findings point to a model for further investigating how sex-specific innate behaviors in living things are controlled.
分类: ScienceDaily

Catalyst mimics the z-scheme of photosynthesis

Earth & Climate - 星期五, 06/23/2017 - 02:30
A new study demonstrates a process with great potential for developing technologies for reducing CO2 levels.
分类: ScienceDaily

New efficient, low-temperature catalyst for hydrogen production

Earth & Climate - 星期五, 06/23/2017 - 02:29
Scientists have developed a new low-temperature catalyst for producing high-purity hydrogen gas while simultaneously using up carbon monoxide (CO). The discovery could improve the performance of fuel cells that run on hydrogen fuel but can be poisoned by CO.
分类: ScienceDaily

Satellite data to map endangered monkey populations on Earth

Earth & Climate - 星期五, 06/23/2017 - 00:19
Using a combination of satellite and ground data, a research team can map multiple indicators of monkey distribution, including human activity zones as inferred from roads and settlements, direct detections from mosquito-derived iDNA, animal sound recordings, plus detections of other species that are usually found when monkeys are present, such as other large vertebrates.
分类: ScienceDaily

Look inside your own pantry or fridge to find the top culprit of food waste

Earth & Climate - 星期四, 06/22/2017 - 20:33
Did you know you throw out about 20 pounds of food every month? Nearly 40 percent of the food produced in the U.S. goes to waste. Experts have tips for reducing waste at home, and look at how the food service industry is working to do the same.
分类: ScienceDaily

Can animal diet mitigate greenhouse emissions?

Earth & Climate - 星期四, 06/22/2017 - 20:29
The inclusion of agroindustrial by-products in pig feed can reduce the nitrous oxide emissions (N2O) of the slurry used as manures up to 65%, suggests new research.
分类: ScienceDaily

New research leverages big data to predict severe weather

Earth & Climate - 星期四, 06/22/2017 - 02:51
Every year, severe weather endangers millions of people and causes billions of dollars in damage worldwide. But new research has found a way to better predict some of these threats by harnessing the power of big data.
分类: ScienceDaily

Mystery of unexplained 'bright nights' solved

Earth & Climate - 星期四, 06/22/2017 - 01:34
Dating back to the first century, scientists, philosophers and reporters have noted the occasional occurrence of 'bright nights,' when an unexplained glow in the night sky lets observers see distant mountains, read a newspaper or check their watch. A new study accepted for publication in Geophysical Research Letters, a journal of the American Geophysical Union, uses satellite data to present a possible explanation for these puzzling historical phenomena.
分类: ScienceDaily
同步内容