搜索结果: 1-15 共查到“理学 oxygen”相关记录231条 . 查询时间(0.085 秒)
Rondaxe Lake in Herkimer County, New York, represents classic Adirondack Park waters. But over the last quarter-century, Rondaxe – like thousands of lakes in temperate zones around the world – has bee...
Comet 67P/Churyomov-Gerasimenko – arguably the most-studied comet in history – has yielded a cosmic surprise: It emits molecular oxygen drawn from its nucleus.
A new study co-led by a Cornell researcher has identified serpentinite – a green rock that looks a bit like snakeskin and holds fluids in its mineral structures – as a key driver of the oxygen recycli...
Researchers have found that the extinction at the end of the Permian period coincided with a sudden spike and subsequent drop in the ocean's oxygen content.
Sea ice kept oxygen from reaching deep ocean during last ice age, study finds（图）
Sea ice oxygen reaching deep ocean during ice age
2021/3/5
Extensive sea ice covered the world's oceans during the last ice age, preventing oxygen from penetrating into deep ocean waters and complicating the relationship between oxygen and carbon, a new study...
Organic matter,bacteria doom sea stars to oxygen depletion（图）
Organic matter bacteria doom sea stars oxygen depletion
2021/1/28
For more than seven years, a mysterious wasting disease has nearly killed off sea star populations worldwide. Many of these species are at the brink of extinction.New Cornell University-led resea...
Without oxygen, Earth's early microbes relied on arsenic to sustain life（图）
Without oxygen Earth early microbes relied arsenic sustain life
2020/10/16
Much of life on Earth today relies on oxygen to exist, but before oxygen was present on our planet, lifeforms likely used arsenic. The findings of the U.S. National Science Foundation-funded rese...
Volcanic activity and changes in Earth's mantle were key to rise of atmospheric oxygen（图）
Volcanic activity changes Earth mantle were key rise atmospheric oxygen
2020/6/19
Oxygen first accumulated in the Earth's atmosphere about 2.4 billion years ago, during the Great Oxidation Event. A long-standing puzzle has been that geologic clues suggest early bacteria were photos...
Carbon hides in sediment,keeping oxygen in atmosphere（图）
Carbon hides sediment keeping oxygen atmosphere
2019/10/28
A new study by researchers at the Woods Hole Oceanographic Institution and Harvard University may help settle a long-standing question: how do small amounts of organic carbon become locked away in roc...
Scientists at the Scripps Institution of Oceanography at the University of California, San Diego, have found that low oxygen levels in seawater could blind some marine invertebrates.The results, publi...
2018年冷泉港亚洲会议：Iron,Reactive Oxygen Species&Ferroptosis in Life,Death&Disease（Cold Spring Harbor Asia conference on Iron,Reactive Oxygen Species&Ferroptosis in Life,Death&Disease）
2018年 冷泉港亚洲会议 Iron,Reactive Oxygen Species&Ferroptosis in Life,Death&Disease
2018/1/12
We are pleased to announce the Cold Spring Harbor Asia conference on Iron, Reactive Oxygen Species & Ferroptosis in Life, Death & Disease which will be held in Suzhou, China, located approximately 60 ...
2018年冷泉港亚洲会议（Iron, Reactive Oxygen Species & Ferroptosis in Life, Death & Disease）
Fe(II) Fe(III) H2O2
2017/12/28
We are pleased to announce the Cold Spring Harbor Asia conference on Iron, Reactive Oxygen Species & Ferroptosis in Life, Death & Disease which will be held in Suzhou, China, located approximately 60 ...
中国地质大学科学技术发展院张磊（博士生）， 赵来时等GPMR国家重点实验室 Geochimica et Cosmochimica Acta, 2017. Raman spectral, elemental, crystallinity, and oxygen-isotope variations in conodont apatite during diagenesis
牙形；石磷；灰石；古海洋；古气候
2021/10/21
近日，中国地质大学地质过程与矿产资源国家重点实验室赵来时教授团队在国际著名期刊《Geochimica et Cosmochimica Acta》发表题为Raman spectral, elemental, crystallinity, and oxygen-isotope variations in conodont apatite during diagenesis（牙形石磷灰石的拉曼光谱、元素...
Caltech Chemical Engineer Explains Oxygen Mystery on Comets
Caltech Chemical Engineer Oxygen Mystery Comets
2017/7/20
A Caltech chemical engineer who normally develops new ways to fabricate microprocessors in computers has figured out how to explain a nagging mystery in space—why comets expel oxygen gas, the same gas...
Decades of Data on World’s Oceans Reveal a Troubling Oxygen Decline
Decades of Data World’s Oceans Oxygen Decline
2017/7/19
A new analysis of decades of data on oceans across the globe has revealed that the amount of dissolved oxygen contained in the water – an important measure of ocean health – has been declining for mor...