| 单词 | nitrogen fixation |
| 例句 | Just like modern legumes and other plants that use nitrogen fixation, these cycads trade their sugars with bacteria in their roots in exchange for nitrogen plucked from the atmosphere. Plants that survived dinosaur extinction pulled nitrogen from air 2023-11-16T05:00:00Z “A good one that has been proposed is to understand nitrogen fixation,” Chong said. A quantum leap forward: University of Chicago gets $150 million from Google, IBM to build world’s most powerful supercomputer 2023-05-22T04:00:00Z As shown in Figure 1, the nitrogen that enters living systems by nitrogen fixation is successively converted from organic nitrogen back into nitrogen gas by bacteria. Fundamentals of Biology 2015-01-01T00:00:00Z As shown in Figure 20.12, the nitrogen that enters living systems by nitrogen fixation is eventually converted from organic nitrogen back into nitrogen gas by bacteria. Concepts of Biology 2013-04-25T00:00:00Z In this case, nitrogen fixation is the process where organisms convert atmospheric nitrogen into biologically useful chemicals. Chemistry 2019-02-14T00:00:00Z What is less clear is how nitrogen fixation helped the surviving cycads. Plants that survived dinosaur extinction pulled nitrogen from air 2023-11-16T05:00:00Z Gaseous nitrogen is transformed into ammonia through nitrogen fixation. Biology for AP Courses 2022-06-09T00:00:00Z Through symbiotic nitrogen fixation, the plant benefits from using an endless source of nitrogen from the atmosphere. Fundamentals of Biology 2015-01-01T00:00:00Z Only certain types of bacteria can convert nitrogen gas into ammonia through a process called nitrogen fixation. Miller & Levine Biology 2018-01-01T00:00:00Z This process is one type of nitrogen fixation. Chemistry 2019-02-14T00:00:00Z According to one study, viruses killing off a main competitor of toxic Microcystis may help pave the way for blooms; another indicates nitrogen fixation by other bacteria may provide the needed boost. To tame lake-fouling algal blooms, try an ecosystem approach 2022-07-05T04:00:00Z Construct a representation of the regulation of genes encoding the nitrogen fixation system using the elements below. Biology for AP Courses 2022-06-09T00:00:00Z Soil bacteria, collectively called rhizobia, symbiotically interact with legume roots to form specialized structures called nodules, in which nitrogen fixation takes place. Fundamentals of Biology 2015-01-01T00:00:00Z In contrast to the results of the P* method, direct measurements of nitrogen-fixation rates suggest that there is a clear spatial separation between nitrogen fixation and denitrification5–7. Consistent patterns of nitrogen fixation identified in the ocean 2019-02-12T05:00:00Z However, a few organisms can overcome this problem through a process known as nitrogen fixation, illustrated in Figure 18.32. Chemistry 2019-02-14T00:00:00Z Scientific journals rejected her work for three years — believing nitrogen fixation was limited to root nodules — until it was finally published in 2005. Our fertilizer is killing us. Here’s a fix 2018-10-11T04:00:00Z Gaseous nitrogen is transformed, or “fixed” into more readily available forms such as ammonia through the process of nitrogen fixation. Biology for AP Courses 2022-06-09T00:00:00Z Here, the presence of certain traits, such as the C4 photosynthesis pathway or nitrogen fixation, made a bigger difference to the plots' overall health than the number of species. Biodiversity moves beyond counting species 2017-05-30T04:00:00Z They complement their approach by using a model of ocean biogeochemistry and ecology to investigate the ecological controls on marine nitrogen fixation. Consistent patterns of nitrogen fixation identified in the ocean 2019-02-12T05:00:00Z To date, the only known kind of biological organisms capable of nitrogen fixation are microorganisms. Chemistry 2019-02-14T00:00:00Z “Instead of channeling all a chicken’s energy into its breast meat, you are forcing the cell to pump its energy into nitrogen fixation.” Our fertilizer is killing us. Here’s a fix 2018-10-11T04:00:00Z Abiotic nitrogen fixation occurs as a result of lightning or by industrial processes. Biology for AP Courses 2022-06-09T00:00:00Z Last year, Buick published evidence that biological nitrogen fixation was already well established half a billion years before these Pilbara basalts erupted. Earth’s ancient atmosphere was half as thick as it is today 2016-05-09T04:00:00Z In these regions, nitrogen fixation provides more than 30% of the nitrogen required to fuel the production of biomass and its subsequent export to the deep ocean. Consistent patterns of nitrogen fixation identified in the ocean 2019-02-12T05:00:00Z Kalil did an undergraduate in microbiology in Minnesota, then worked for a Minnesota company that was using microbial products in lieu of fertilizer to produce nitrogen fixation. Woman scouts for diseases, pests in 5 North Dakota counties 2015-09-27T04:00:00Z He notes that many of the article titles in the latest issue of Ecology contain technical terms — such as nitrogen fixation — that would be challenging to explain briefly in general terms. Petition calls for lay summaries in ecology journals 2015-03-31T04:00:00Z Nitrogenase, the enzyme that fixes nitrogen, is inactivated by oxygen, so the nodule provides an oxygen-free area for nitrogen fixation to take place. Biology for AP Courses 2022-06-09T00:00:00Z Those low levels, it suggests, are likely because we are now observing the remnants of ancient nitrogen fixation amid changed atmospheric conditions. Curiosity rover finds new signs that Mars could have supported life 2015-03-24T04:00:00Z With around 400 encoded qubits, Troyer says, it would be possible to analyse ways to improve industrial nitrogen fixation—the energy-intensive process that turns the unreactive molecule in air into fertilizer. Quest for Quantum Computers Heats Up 2014-12-04T05:00:00Z With around 400 encoded qubits, Troyer says, it would be possible to analyse ways to improve industrial nitrogen fixation — the energy-intensive process that turns the unreactive molecule in air into fertilizer. Physics: Quantum computer quest 2014-12-02T05:00:00Z "The entire living world is based on this nitrogen fixation process," says Sella. The bringer of life and death 2014-06-06T04:00:00Z Which statement best explains which organisms need nitrogen fixation and why? Biology for AP Courses 2022-06-09T00:00:00Z The first one was the agricultural revolution started by the Haber-Bosch process of nitrogen fixation which is today keeping a third of the world alive. Lindau 2013: Steven Chu talks innovation, energy, climate change and awareness 2013-07-03T17:15:00.617Z We don't need the fertilizer people so much because of biological nitrogen fixation. Green Blog: Q. and A.: Farming for an Uncertain Future 2012-09-27T11:43:10Z Biological nitrogen fixation and utilization in agriculture is a fascinating, multi-layered symbiosis. Nitrogen Fixation 2012-01-15T19:15:03.357Z Nitrogen fixation is something that needs to happen in an anaerobic environment, and so when you break the crust up, you aerate it, and when you aerate it then the nitrogen fixation basically stops. A Crust of Dust: Degradation of Desert Topsoil by Human Activities May Wreak Havoc with the Environment 2012-01-09T13:15:00.217Z Cyanobacteria live in most aquatic ecosystems where sunlight is present; they play a key role in nitrogen fixation. Biology for AP Courses 2022-06-09T00:00:00Z This is likely an accounting problem, meaning that we are not going to the right places to measure nitrogen fixation, rather than an indication that the ocean is losing nitrogen. Scientist at Work: Q. and A. on the Nitrogen Cycle 2011-05-26T15:57:10Z The excess phosphorus may signal that conditions are ripe for nitrogen fixation. Scientist at Work: Tracing Nitrogen's Path Through the Ocean 2011-04-12T15:45:43Z The ratios will help us to infer something about the relative contributions of different nitrogen cycling processes, in particular nitrogen fixation. Scientist at Work: Collecting Seawater From the Depths 2011-04-04T18:37:13Z That they have come ultimately from the free atmospheric nitrogen seems certain, and various attempts have been made to explain a method of this nitrogen fixation. The Story of Germ Life As shown in Figure 37.18, the nitrogen that enters living systems by nitrogen fixation is successively converted from organic nitrogen back into nitrogen gas by bacteria. Biology for AP Courses 2022-06-09T00:00:00Z The flux of nitrogen from land to sea is about 80 teragrams per year of nitrogen, or roughly half of the amount of nitrogen added to the ocean by biological nitrogen fixation. Scientist at Work: Q. and A. on the Nitrogen Cycle 2011-05-26T15:57:10Z Getting nitrogen from the air is called nitrogen fixation. The Story of the Soil; from the Basis of Absolute Science and Real Life, It is the expressed intention of certain governments outside Germany to foster the nitrogen fixation enterprise. The Riddle of the Rhine; chemical strategy in peace and war There is little reason, however, for believing this to be a very important factor But in the soil bacteria we find undoubtedly an efficient agency m this nitrogen fixation. The Story of Germ Life Describe nitrogen fixation and why it is important to agriculture. Biology for AP Courses 2022-06-09T00:00:00Z Averaged over the entire ocean, measurements of nitrogen removal processes appear to exceed measurements of nitrogen fixation rates. Scientist at Work: Q. and A. on the Nitrogen Cycle 2011-05-26T15:57:10Z The reduction of nitrates back to nitrogen gas is called nitrogen fixation. Biology for AP Courses 2022-06-09T00:00:00Z It may be, however, that as the nitrogen fixation enterprise was developed there, requiring a large amount of technical development and control, this was considered a sufficient contribution to the general cause. The Riddle of the Rhine; chemical strategy in peace and war We do not know to what extent these organisms are distributed in the soil, nor how widely this nitrogen fixation through bacterial life is going on. The Story of Germ Life The process of nitrate formation from ammonia is called nitrogen fixation. Biology for AP Courses 2022-06-09T00:00:00Z Alyson, do you think that temperature is an important factor controlling nitrogen fixation rates in the area that you are covering? Scientist at Work: Q. and A. on the Nitrogen Cycle 2011-05-26T15:57:10Z The process of nitrogen being bonded into organic molecules is called nitrogen fixation. Biology for AP Courses 2022-06-09T00:00:00Z The most formidable examples of such excess production were, and remain, the nitrogen fixation and the nitric acid plants of the I.G. The Riddle of the Rhine; chemical strategy in peace and war Identify three beneficial results of symbiotic nitrogen fixation. Biology for AP Courses 2022-06-09T00:00:00Z The process of nitrogen being bonded to organic molecule is called nitrogen fixation. Biology for AP Courses 2022-06-09T00:00:00Z Through symbiotic nitrogen fixation, the plant benefits from using an endless source of nitrogen: the atmosphere. Biology for AP Courses 2022-06-09T00:00:00Z The nitrogen fixation plants of the I.G. undoubtedly demand the same critical examination. The Riddle of the Rhine; chemical strategy in peace and war |
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