Results 51 to 60 of about 551,517 (349)

Global Nitrogen Deposition Promotes Carbon Sink Formation in Terrestrial Ecosystems

Advanced Science, EarlyView.
Nitrogen deposition alleviates ecosystem N limitation and enhances carbon sinks. Using 829 observations, we show 36% of deposited N is retained globally (39.15 Tg N yr−1), with distinct NHx and NOy contributions. This retention drives a terrestrial C sink of 0.88 Pg C yr−1 (25.48%), highlighting the importance of pool‐specific C:N stoichiometry ...
Lei Li, Mingyu Xie, Nan Jia, Li‐Dong Mo, Qiang Yu, Fanjiang Zeng, Xiangyi Li   +6 more
wiley   +1 more source

Experimental study on buoyancy and side friction of underground silos in sand and silty clay

Frontiers in Earth Science
In current anti-flotation designs for underground structures, buoyancy is typically calculated based on Archimedes’ principle and the contribution of side friction is often neglected, potentially resulting in unnecessary construction costs. In this study,
Bo Yang, Shaopeng Chen, Chengyao Zhang, Na Su, Shun Zhang, Di Zhu   +5 more
doaj   +1 more source

Middle and Late Pleistocene environmental history of the Marsworth area, south-central England [PDF]

, 2014
To elucidate the Middle and Late Pleistocene environmental history of south-central England, we report the stratigraphy, sedimentology, palaeoecology and geochronology of some deposits near the foot of the Chiltern Hills scarp at Marsworth ...
Adamiec, Andrew Currant, Andrews, Avery, Ballantyne, Barrow, Bascomb, Bates, Bates, Bates, Bowen, Bowen, Bowen, Bowen, Bowen, Bowen, Bowen, Bowen, Bowen, Bridgland, Candy, Candy, Candy, Canti, Christopher P. Green, Clark, Clayden, Coope, Coope, Currant, Danielle C. Schreve, David H. Keen, David Parish, David Q. Bowen, de Deckker, de Rouffignac, EPICA community members, Evans, Evans, Evans, Galbraith, Gibbard, Gibbard, Gibbard, Gibbard, Green, Green, Gregory, Griffiths, Hamblin, Harmer, Harris, Hill, Hiltermann, Holyoak, Horton, Huntley, Ian Candy, Jarvis, John A. Catt, John G. Evans, Jones, Jones, Jouzel, Julian B. Murton, Kandiano, Kaufman, Keen, Keen, Keen, Keen, Keen, Kerney, Kerney, Kirsty Penkman, Linda L. York, Lisiecki, Lister, Lister, Loveday, Maddy, Markey, McManus, Meijer, Meisch, Mejdahl, Michael P. Kerney, Michael R. Frogley, Miller, Miller, Morgan, Mortimore, Murray, Murray, Murray, Murton, Murton, Murton, Murton, Murton, Murton, Oakley, Oches, Pawley, Penkman, Penkman, Penkman, Penkman, Penkman, Peter Worsley, Phillip S. Toms, Preece, Preece, Prescott, Robinson, Rose, Rousseau, Schreve, Sheila Taylor, Shephard-Thorn, Shephard-Thorn, Sherlock, Sherlock, Soil Survey of England and Wales, Sparks, Stathoplos, Straw, Sumbler, Sumbler, Sykes, Wehmiller, Wenban-Smith, Whiteman, Williams, Williams, Williams, Worsley, Zimmerman   +137 more
core   +2 more sources

Study on the Synergistic Effects and Optimization of Flotation Reagent Blends Under Low Reagent Consumption

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT Under low reagent dosage, the flotation performance of diesel as a collector was enhanced, and the synergistic mechanism of diesel blended with oleic acid and CTAB was investigated. Results showed that compared to pure diesel, the oleic acid blended system (Blend A) increased clean coal yield by 81.52% to 92.24%, while the CTAB blended system (
Rui Shen, Wei Zhou, Huanhuan Shang
wiley   +1 more source

Prediction of Compaction Parameters of Khon Kaen Loess Soil

Walailak Journal of Science and Technology, 2020
Soil stratum in Khon Kaen province, located in Northeast of Thailand, is well-known as a wind-deposited fine-grained soil (i.e. silty sand and silty clay). It is normally called “Loess or Khon Kaen Loess”.
Prinya CHINDAPRASIRT, Apichit KAMPALA, Anukun ARNGBUNTA, Suksun HORPIBULSUK   +3 more
doaj   +1 more source

Ceramic composition at Chalcolithic Shiqmim, northern Negev desert, Israel: investigating technology and provenance using thin section petrography, instrumental geochemistry and calcareous nannofossils [PDF]

, 2018
Technological innovations in ceramic production and other crafts are hallmarks of the Chalcolithic period (4500–3600 BCE) in the southern Levant, but details of manufacturing traditions have not been fully investigated using the range of analytical ...
Burton, Margie M, Levy, Thomas E, Quinn, Patrick S, Tamberino, Anthony   +3 more
core  

Geochemical characteristics of silty clays from the Brusartsi Formation

Review of the Bulgarian Geological Society, 2023
This study investigated the geochemical characteristics of Pliocene clay sediments from the Brusartsi Formation, situated in the area of the town of Kozloduy, North Bulgaria). The main objective of the study is to characterize the Brusartsi clays as a natural barrier against pollutant and radionuclide migration.
Metodi Karadjov, Doncho Karastanev, Boriana Tchakalova   +2 more
openaire   +1 more source

Under the Shade of a Coolabah Tree: A Second Cache of Tulas From the Boulia District, Western Queensland

Archaeology in Oceania, EarlyView.
ABSTRACT This paper reports on the excavation of a cache of stone artefacts, buried on the bank of a waterhole or ‘billabong’ in central western Queensland. This is an extremely rare find, and yet it is the second such site to be reported within less than a 10 km radius.
Yinika L. Perston, Lynley A. Wallis, Heather Burke, Lorna Bogdanek, Trevina Rogers, Justine Kemp   +5 more
wiley   +1 more source

Stiffness of clays and silts: Modeling considerations [PDF]

, 2014
A large database has recently been published that details the development of new empirical expressions for the stiffness reduction with strain of clays and silts.
Bolton, Malcolm, Vardanega, Paul J
core   +2 more sources

Experimental Setup for Splash Erosion Monitoring—Study of Silty Loam Splash Characteristics [PDF]

, 2020
An experimental laboratory setup was developed and evaluated in order to investigate detachment of soil particles by raindrop splash impact. The soil under investigation was a silty loam Cambisol, which is typical for agricultural fields in Central ...
Dostál T., Jeřábek J., Johannsen L.L., Kavka P., Klik A., Laburda T., Mützenberg D.V., Neumann M., Strauss P., Zambon N., Zumr D.   +10 more
core   +1 more source