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The generation of oxygen from electrolysis in gel electromembrane extraction (G-EME) causes a negative error when applied to the analysis of easily oxidized species such as nitrite. Nitrite in G-EME is oxidized by oxygen to nitrate, leading to the negative error and the impossibility of simultaneous analysis. In this work, the application of oxygen scavengers …

Application of oxygen scavengers in gel electromembrane extraction: A green methodology for simultaneous determination of nitrate and nitrite in sausage samples Read More »

Hepatitis B infection has caused severe symptoms and fatalities around the world, so a simple and fast point-of-care diagnostics is in need. In this work, the research group of Professor Orawon Chailapakul developed an electrochemical sensor for simultaneous detection of hepatitis B surface antigen (HBsAg) and hepatitis B e antigen (HBeAg), common Hepatitis B biomarkers. …

Dual-label vertical-flow based electrochemical sensor for hepatitis B diagnostics Read More »

Ten undescribed benzophenones, schomburginones A− J, together with 14 known analogs were isolated from the leaves of Garcinia schomburgkiana, an edible plant native to the Indochina region. The structures of the undescribed compounds were elucidated by NMR combined with HRMS spectroscopy, while their absolute configurations were determined using ECD and single-crystal X-ray diffraction analysis. The …

Schomburginones A‒J, geranylated benzophenones from the leaves of Garcinia schomburgkiana and their cytotoxic and anti-inflammatory activities Read More »

Geographical indication, a type of intellectual properties, plays a pivotal role in modern world trades. It is a tool that can very well sustain the value of local products. In a research led by Assoc. Prof. Dr. Thanit Praneenararat, the analysis of chemical constituents in Thai coffees was performed using paper spray mass spectrometry. This …

Paper spray mass spectrometry as an effective tool for differentiating coffees based on their geographical origins Read More »

Prof. Dr. Orawon Chailapakul from the Department of Chemistry, Faculty of Science, Chulalongkorn University and her group earned awards from the 48th International Exhibition of Inventions of Geneva held in Geneva, Switzerland, from April 26-30, 2023. The team received gold medal from “An Innovative Electrochemical Analytical Device with a Smartphone for Heavy Metals Detection” and …

Electrochemical Sensors Earned Medal Awards from the 48th International Exhibition of Inventions GENEVA Read More »

Professor Dr. Sanong Ekgasit and team from Department of Chemistry, Faculty of Science, Chulalongkorn University won 6 innovation awards and 1 special prize at the 48th International Exhibition of Inventions of Geneva held in Geneva, Switzerland from April 26-30, 2023. The awards included 2 Gold Medals; (1) Aragoshine: Glittering Bio-Calcium Carbonate and (2) Hyacinth Nanocrystals: …

Outstanding Innovation Award for excellent effort in creating invention at 48th International Exhibition of Inventions GENEVA Read More »

– pH-responsive nanofiber was developed based on gelatin and red radish anthocyanin.– Only aqueous media was used in material fabrication using electrospinning.– Nanofibrous mats could be stored in a wide range of temperatures over 2 months.– Unique color change of nanofiber in different pHs could be detected by naked eye.– The green-fabricated nanofiber showed a …

Nanofibrous membrane from red radish for meat spoilage monitoring Read More »

       Weedy rice is one of the most problematic weeds in rice-growing regions, particularly in Southeast Asia. Unlike other types of weeds, it is extremely difficult to distinguish weedy rice from cultivated rice directly from paddy seeds as they exhibit common morphological features. As such weed management can be a difficult, time-consuming, and …

Mapping Hyperspectral NIR images using Supervised Self-Organizing Maps: Discrimination of Weedy Rice Seeds Read More »

             The research group of Assoc. Prof. Boosayarat Tomapatanaget has successfully fabricated helicene dye-encapsulated ethyl cellulose (EC@dye-NH) nanoparticles as fluorescence biosensors for specific and selective detection of long-chain aldehydes, which are significant biomarkers of lung cancer. This effective probe employed the idea of an imine formation reaction between hydrazine group …

Helicene-Hydrazide Encapsulated Ethyl Cellulose as a Potential Fluorescence Sensor for Highly Specific Detection of Nonanal in Aqueous Solutions and a Proof-of-Concept Clinical Study in Lung Fluid Read More »