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Runoff response to climate change and human activities in a typical karst watershed, SW China

This study aims to reveal the runoff variation characteristics of long time series in a karst region, analyse comprehensively its different driving factors, and estimate quantitatively the contribution rates of climate change and human activities to net runoff variation. Liudong river basin, a typical karst watershed in southwest China, is the study site. Statistical methods...

Estimation of soil organic carbon storage and its fractions in a small karst watershed

With few available soil organic carbon (SOC) profiles and the heterogeneity of those that do exist, the estimation of SOC pools in karst areas is highly uncertain. Based on the spatial heterogeneity of SOC content of 23,536 samples in a karst watershed, a modified estimation method was determined for SOC storage that exclusively applies to karst areas. The method is a “soil-type...

A Comparative Study of Electrolyte Flow and Slime Particle Transport in a Newly Designed Copper Electrolytic Cell and a Laboratory-Scale Conventional Electrolytic Cell

. - WEIZHI ZENG ,1,3 SHIJIE WANG,2 and MICHAEL L. FREE1 INTRODUCTION Electrorefining is widely used to refine non-ferrous metals such as copper, zinc, etc. as a final step to meet purity requirements. For

Rare Earth Metals: Resourcefulness and Recovery

SHIJIE WANG .Rio Tinto Kennecott Utah Copper South Jordan UT USA. .e-mail: When we appreciate the digital revolution carried over from the twentieth century with mobile communication and the ... , Yb, and Lu. The term rare earths was originally used to describe the oxides of the metals belonging to the Ln Shijie Wang is the guest editor for the Hydrometallurgy and Electrometallurgy Committee of

Characteristics of strontium isotopes and their implications in the Qixing Cave of Guizhou, China

The strontium isotopic compositions (87Sr/86Sr) of samples including soils, bedrock, soil waters, drip waters and their corresponding speleothems in the Qixing Cave (QXC), Guizhou Province, China, were systemically measured and analyzed. The results indicate that there are significant Sr isotopic differences among samples. The mean 87Sr/86Sr ratios in drip water for the samples 1...

Organic Carbon Storage in Four Ecosystem Types in the Karst Region of Southwestern China

Karst ecosystems are important landscape types that cover about 12% of the world's land area. The role of karst ecosystems in the global carbon cycle remains unclear, due to the lack of an appropriate method for determining the thickness of the solum, a representative sampling of the soil and data of organic carbon stocks at the ecosystem level. The karst region in southwestern...

Isolation and identification of a bovine viral diarrhea virus from sika deer in china

Background Bovine viral diarrhea virus (BVDV) infections continue to cause significantly losses in the deer population. Better isolation and identification of BVDV from sika deer may contribute significantly to the development of prophylactic therapeutic, and diagnostic reagents as well as help in prevention and control of BVDV. However, isolation and identification of BVDV from...

Association of the thymidylate synthase polymorphisms with esophageal squamous cell carcinoma and gastric cardiac adenocarcinoma

Polymorphisms in the untranslated regions (UTRs) of the thymidylate synthase (TS) gene, which may modulate TS transcription and expression, have been associated with susceptibility and prognosis of several tumors. However, their effects on the development and clinical staging of esophageal squamous cell carcinoma (ESCC) and gastric cardiac adenocarcinoma (GCA) have not been...