Results 51 to 60 of about 6,047,181 (260)

Quantification of Carbonate Rock Dissolution Rates and Their Environmental Controls in the Northern Guangdong Karst Region Using the Dissolution Tablet Method

open access: yesRedai dili
Carbonate dissolution, a key process in the global carbon cycle, sequesters large quantities of atmospheric CO2 and directly regulates inorganic carbon fluxes from terrestrial, river, and ocean ecosystems.
Weihua Tang   +8 more
doaj   +1 more source

Chemical Ionization Mass Spectrometry: Fundamental Principles, Diverse Applications, and the Latest Technological Frontiers

open access: yesMass Spectrometry Reviews, EarlyView.
ABSTRACT The review examines the evolution of chemical ionization mass spectrometry (CI‐MS), a technique developed in 1966 by Field and Munson. CI is a soft‐ionization method that produces more intense molecular ions with less fragmentation than electron ionization (EI).
Malvika Dutt   +4 more
wiley   +1 more source

Leakage analysis and remediation measures for typical karst reservoirs with structural deficiencies in Guangxi

open access: yesCarsologica Sinica
Karst leakage poses a critical engineering challenge to the safety and functionality of reservoirs in Guangxi, potentially leading to water loss, reduced performance, or even operational failure.
Chun ZHUO   +4 more
doaj   +1 more source

Karst Water Management in Slovenia in the Frame of Vulnerability Mapping

open access: yesActa Carsologica, 2006
Slovene karst sources are of great national importance for drinking water supply. Since karst aquifer systems are very susceptible to contamination, these sources require appropriate and careful managing. Unfortunately, in the acts of Slovene legislation,
Nataša Ravbar, Gregor Kovačič
doaj   +1 more source

An Elasto–Plastic Hydro–Mechanical Model for Analyzing the Swelling Behavior of Heterogeneous Clay–Sulfate Rocks

open access: yesInternational Journal for Numerical and Analytical Methods in Geomechanics, EarlyView.
ABSTRACT Swelling of clay‐sulfate rocks is a concern in geotechnical engineering that can damage infrastructure. In the historic town of Staufen in southwest Germany, geothermal drilling into a swellable anhydrite‐bearing clay formation resulted in water inflow and subsequent swelling, triggering ground heave and damage to more than 250 houses.
Reza Mahmoudi Kouhi   +4 more
wiley   +1 more source

Preliminary modeling investigation on changes in Karst fractures and seepage field in rockmass between streams with equal water levels

open access: yesShuiwen dizhi gongcheng dizhi
The analytical solution of distributed water table in an unconfined aquifer between streams has been obtained in classic groundwater hydraulics based on Dupuit’s assumption, and it is frequently used in engineering practice. However, the applicability of
Youjun JIAO   +3 more
doaj   +1 more source

The Karst Waters Institute

open access: yesEos, Transactions American Geophysical Union, 1992
The Karst Waters Institute (KWI) is a U.S. research organization that was formed to combine the skills of academic, governmental, and private sector specialists to solve existing karst water problems and anticipate future problems. KWI has been incorporated as a not‐for‐profit corporation in West Virginia to provide the human expertise and database ...
openaire   +1 more source

A historical specimen of False Lingzhi (Ganoderma lucidum) resolves a 245‐year‐old confusion within an important medicinal mushroom group

open access: yesPLANTS, PEOPLE, PLANET, EarlyView.
Traditional Chinese Medicine has expanded far beyond Asia, with growing markets in North America and Europe for supplements and functional foods. Lingzhi or Reishi (Ganoderma lingzhi), a well‐known medicinal mushroom, is valued for its anti‐inflammatory and anticancer properties.
Torda Varga   +8 more
wiley   +1 more source

Urban expansion drivers and land use scenario simulation in Nanning, China, using the PLUS model

open access: yesScience Progress
With environmental changes and rapid urbanization, Chinese cities face serious challenges such as disrupted water cycles, frequent flooding, and ecological imbalances.
Yun-chuan Yang   +9 more
doaj   +1 more source

Progress of UAV Application in Soil Erosion Research

open access: yesRedai dili
Soil erosion is a major global environmental concern. Safeguarding soil and water resources requires a comprehensive understanding of erosion processes to proactively address and manage soil erosion.
Zhou Yangchi   +3 more
doaj   +1 more source

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