Results 81 to 90 of about 1,071,828 (189)

Searching for the Terrestrial Paleocene/Eocene Boundary at the Canadian High Arctic: A Carbon Isotope Study [PDF]

, 2007
The Paleocene Eocene Thermal Maximum (PETM) is a rare climatic event in the history of the Earth, which marks the abrupt transition from the Paleocene to Eocene of the Cenozoic era with a rapid increase in global surface temperatures of up to 5-8&#;C ...
Kraus, Monica
core   +1 more source

Effects of Nitrogen Deposition and Precipitation Patterns on Nitrogen Allocation of Mongolian Pine (Pinus sylvestris var. mongolica) on Sandy Land Using ¹⁵N Isotope

Agriculture
In the context of global climate change, atmospheric nitrogen deposition is increasing, and precipitation patterns are becoming more variable. This study examines the impact of these changes on nitrogen (N) allocation mechanisms in semi-arid region tree ...
Tianhong Zhao, Shihao Cheng, Qun Gang, Yonghui Zhuang, Xianjin Zhu   +4 more
doaj   +1 more source

Nitrification-denitrification in WSP: a mechanism for permanent nitrogen removal in maturation ponds [PDF]

, 2009
A pilot-scale primary maturation pond was spiked with 15N-labelled ammonia (15NH4Cl) and 15N labelled nitrite (Na15NO2), in order to improve current understanding of the dynamics of inorganic nitrogen transformations and removal in WSP systems.
Camargo Valero, M, Curtis, T, Davenport, R, Mara, D, Newton, R, Read L F   +5 more
core  

Soil Property Alterations and Nitrogen Use Dynamics of Hemarthria altissima Under Distinct Nitrogen Forms

Agronomy
Atmospheric nitrogen deposition is increasing worldwide, with profound implications for plant nitrogen acquisition and ecosystem nutrient cycling, particularly in nitrogen-limited systems.
Xiaowei Wei, Mingyue Sun, Shihan Feng, Ju Zhang, Yidi Gai, Yuheng Yang, Xuechen Yang   +6 more
doaj   +1 more source

Nitrogen Contribution by Palm Oil Mill Effluent to Young Oil Palm (Elaeis guineensis Jacq.) as measured by 15N Isotope Dilution Technique [PDF]

, 1994
Palm oil mill effluent (POME) is an organic waste material produced at the oil palm mills. In its raw form, POME is highly polluting due to its high content of biological and chemical oxygen demand.
Abdul Rahman, Zaharah, T., Mohd Hashim
core  

NITROGEN CYCLING IN A FOREST STREAM DETERMINED BY A 15N TRACER ADDITION [PDF]

, 2000
Nitrogen uptake and cycling was examined using a six‐week tracer addition of 15N‐labeled ammonium in early spring in Walker Branch, a first‐order deciduous forest stream in eastern Tennessee.
Meyer, Judy L., Mulholland, Patrick J., Peterson, Bruce J., Sanzone, Diane M., Tank, Jennifer L., Webster, Jackson R., Wollheim, Wilfred M.   +6 more
core   +1 more source

Isotopic Nitrogen-15 Labeling of Mice Identified Long-lived Proteins of the Renal Basement Membranes. [PDF]

Sci Rep, 2020
Liu P, Xie X, Jin J.
europepmc   +1 more source

Fate of Fertilizer Nitrogen in the Field 2 Years After Biochar Application

Plants
This study aimed to clarify the scientific quantification of fertilizer nitrogen (N) uptake and utilization, its destination, and its residual distribution in the soil at a depth of 0–30 cm after biochar application using 15N tracer technology.
Lining Zhao, Weijun Yang, Zi Wang, Jinshan Zhang, Liyue Zhang, Mei Yang, Xiangrui Meng, Lei Ma   +7 more
doaj   +1 more source

Submillimeter, millimeter, and microwave spectral line catalogue [PDF]

A computer accessible catalogue of submillimeter, millimeter and microwave spectral lines in the frequency range between 0 and 3000 GHZ (i.e., wavelengths longer than 100 mu m) is presented which can be used a planning guide or as an aid in the ...
Pickett, H. M., Poynter, R. L.
core   +1 more source

Barnes Hospital Bulletin [PDF]

, 1967
https://digitalcommons.wustl.edu/bjc_barnes_bulletin/1017/thumbnail ...

core   +1 more source