Results 41 to 50 of about 6,223 (163)

Calibration and Detection of Phosphine Using a Corrosion-Resistant Ion Trap Mass Spectrometer

Biophysica
We present a corrosion-resistant quadrupole ion trap mass spectrometer (QIT-MS) designed for trace detection of volatiles in sulfuric acid aerosols, with a specific focus on phosphine (PH3).
Dragan Nikolić, Xu Zhang
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Simultaneous Phosphorus and Si Self-Diffusion in Extrinsic, Isotopically Controlled Silicon Heterostructures [PDF]

MRS Proceedings, 2004
ABSTRACTWe present experimental results of impurity and self-diffusion in an isotopically controlled silicon heterostructure extrinsically doped with phosphorus. As a consequence of extrinsic doping, the concentration of singly negatively charged native defects is enhanced and the role of these native defect charge states in the simultaneous phosphorus
Silvestri, Hughes H., Bracht, Hartmut A., Sharp, Ian D., Hansen, John, Nylandsted-Larsen, Arne, Haller, Eugene E.   +5 more
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An optimized method for extraction and purification of inorganic phosphate from plant material for oxygen isotope ratio analysis

MethodsX
Compound-specific stable isotope ratio analysis of oxygen isotopes in inorganic phosphate can be used to study biological phosphorus cycling and the transformation processes controlling the fate of phosphorus. However, methods for extraction of inorganic
Maria Monrad Rieckmann, Ruth Elaine Blake, Sae Jung Chang, Kristian Holst Laursen   +3 more
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Improvements in the preparation of phosphate for oxygen isotope analysis from soils and sediments. [PDF]

PLoS ONE, 2018
In contrast to the successful preparation of phosphate for oxygen isotope analysis from water samples, there are still a series of problems for similar analyses from soils and sediments.
Zifu Xu, Tao Huang, Xijie Yin
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Mercury distribution and transfer in mangrove forests in urban areas under simulated rising sea levels

Frontiers in Marine Science
This study assesses the impact of simulated sea level rise (SLR) on mercury distribution and migration in an urban mangrove wetland on the northern coast of Maluan Bay, Xiamen City, Fujian Province, China.
Xilin You, Xilin You, Lumin Sun, Xiaozheng Chen, Xiaozheng Chen, Yiting Li, Jue Zheng, Jue Zheng, Dongxing Yuan, Junjie Wu, Junjie Wu, Shiyu Sun   +11 more
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Symbiosis constraints: Strong mycobiont control limits nutrient response in lichens

Ecology and Evolution, 2017
Symbioses such as lichens are potentially threatened by drastic environmental changes. We used the lichen Peltigera aphthosa—a symbiosis between a fungus (mycobiont), a green alga (Coccomyxa sp.), and N2‐fixing cyanobacteria (Nostoc sp.)—as a model ...
Kristin Palmqvist, Oskar Franklin, Torgny Näsholm   +2 more
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Permafrost thaw stimulates primary producers but has a moderate effect on primary consumers in subarctic ponds

Ecosphere, 2020
Frozen tundra soils hold one of the Earth's largest pools of organic carbon. Climate warming and the associated permafrost thaw release a large fraction of this carbon into circumpolar lakes, inducing extreme browning that fuels the heterotrophic ...
Maxime Wauthy, Milla Rautio
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Green manure incorporation enhanced soil labile phosphorus and fruit tree growth

Frontiers in Plant Science
IntroductionThe incorporation of green manures substantially enhances the conversion of external phosphorus (P) fertilizers and soil-reserved P into forms readily available to plants.
Yuanyu Yang, Jianwei Zhang, Xia Chang, Lunlun Chen, Yongmin Liu, Qingwei Xu, Mengjuan Wang, Haiyan Yu, Renmei Huang, Jie Zhang, Yingxiao Hu, Qijuan Hu, Xiaojun Shi, Xiaojun Shi, Yuting Zhang, Yuting Zhang   +15 more
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The fate of carbon, nitrogen and phosphorus in freshwater polyculture mesocosms using both nutrient-balance and stable-isotope assessment

Aquaculture Reports
Freshwater polyculture can increase nutrient use by rearing species from different trophic levels. The aim of this study was to quantify nutrient balances and determine the food sources of fish using nitrogen (N) and phosphorus (P) nutrient balances and ...
Sarah Nahon, Christophe Jaeger, Christophe Menniti, Philippe Kerherve, Marc Roucaute, Joel Aubin   +5 more
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ESR measurements of phosphorus dimers in isotopically enriched 28Si silicon

, 2014
24 pages, 9 ...
Shankar, S., Tyryshkin, A. M., Lyon, S. A.   +2 more
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