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Gd-EOB-DPTA is a hepatocyte-specific contrast agent with the function of double-contrast imaging. It can reflect the blood supply of lesions via dynamic enhancement imaging and show the change in the expression of molecular receptors on hepatocyte membrane via hepatobiliary phase imaging. Gd-EOB-DPTA can reflect the multistep process of hepatocarcinogenesis from multiple dimensions, improve detection of hypovascular hepatocellular carcinoma (HCC) and small HCC, display cirrhotic nodules with high-risk malignant transformation, and therefore, it has been recommended as a noninvasive tool for HCC diagnosis in China and international HCC clinical practice guidelines. This article reviews the recent advances of Gd-EOB-DTPA in the diagnosis of HCC. [ABSTRACT FROM AUTHOR]

DTPA, EDTA and HC1 extractants were used to extract heavy metal absorbable mercury in the soil, by comparison, the highest extraction rate of the extractant DTPA was chosen. Then, the hollow carbon nanospheres/polyaniline composite was prepared. The composite was made into a DNA-modified hollow carbon nanospheres/polyaniline electrochemical sensor and the absorbable mercury in the soil was detected. The results showed that DTPA had the highest extraction rate of absorbable mercury in the soil from 20% to 31%. And the chemical sensor could detect the absorbable mercury content in soil accurately and sensitively. Compared with the results of atomic fluorescence spectrometry, the relative errors between the two actual samples were 2.32% and 2.71%, respectively. [ABSTRACT FROM AUTHOR]