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Conversion of Acetic Acid from the Catalytic Pyrolysis of Xylan Over CeO<sub>2</sub>
Lee, Heejin,Ko, Jeong Huy,Kwon, Woo Hyun,Park, Young-Kwon American Scientific Publishers 2016 Journal of nanoscience and nanotechnology Vol.16 No.5
<P>CeO2 was synthesized hydrothermally in supercritical water and applied to the catalytic pyrolysis of xylan. Acetic acid, which is the main component in bio-oil produced from the non-catalytic pyrolysis of xylan, deteriorates the fuel quality of the oil. Catalysis over CeO2 effectively converted the acetic acid to ketone species, such as acetone, thereby reducing the acidity of the oil considerably. The content of aromatics in bio-oil was also increased substantially by catalysis.</P>
Comparison of Four Point-of-Care Devices for Pregnancy Test in Urine
Heejin So,Kyungsuk Kwon,Jungkyu Park,Kyeongmi Kim 대한임상검사정도관리협회 2023 Journal of Laboratory Medicine And Quality Assuran Vol.45 No.3
Point-of-care (POC) tests for human chorionic gonadotropin (hCG) are widely used in hospital laboratories. However, there is a lack of comparative studies focusing on pregnancy POC devices that test urine. In this study, we aimed to evaluate four commonly used pregnancy POC devices in Korea. From March to May 2023, remnant clinical urine samples were collected from 200 patients, consisting of 100 confirmed pregnant women and 100 nonpregnant women. The evaluated devices included the AllCheck hCG Card (Calth, Korea), Card ASAN Easy Test hCG (Asanpharm., Korea), Humasis hCG Card (Humasis, Korea), and careUS BEBE-CHECK (Wells bio, Korea). Among the four pregnancy POC devices, we observed a 99% negative percent agreement and 97% positive percent agreement. Only four samples showed discrepancies in results, which could be attributed to early pregnancy and abortion. Overall, the hCG POC devices assessed in this study demonstrated high concordance rates. However, we must be careful when interpreting urine pregnancy test results, particularly in cases involving early pregnancy or abortion.