Results 1 to 10 of about 430,572 (307)

Remote-Controlled Microfluidic Platform for Real-Time Detection of Multiple Mycotoxins on Chip [PDF]

Foods
Food safety requires real-time monitoring of mycotoxins in food, as food products contaminated with these toxins poses major threat to human health.
Jun Liu, Shiyu Zeng, Rashid Muhammad, Zhuoao Jiang, Gang Tan, Qi Yang, Binfeng Yin   +6 more
doaj   +2 more sources

Measurement of the coordination effect of polyphenols used in oil field by colorimetric method [PDF]

E3S Web of Conferences, 2021
Polyphenols are widely used in drilling fluid, cement slurry and water treatment in oil fields. The paper is based on the characteristics of the abundant phenolic hydroxyl groups in plant polyphenol compounds that can form stable complexes with iron ions,
Tian Wen, Liu Huanyu, Han Xiaoyu, Zhou Rui, Qu Le, Zhang Jie, Dong Sanbao   +6 more
doaj   +1 more source

Deployable Lab-on-a-Chip Sensor for Colorimetric Measurements

Micromachines, 2023
The infield measurement of nutrients, heavy metals, and other contaminants in water is still a needed tool in environmental sciences. The Lab-on-a-chip approach can develop deployable instruments that use the standardized analytical assay in a ...
Stefan Gassmann, Till Schleifer, Helmut Schuette   +2 more
doaj   +1 more source

One-Step and Colorimetric Detection of Fish Freshness Indicator Hypoxanthine Based on the Peroxidase Activity of Xanthine Oxidase Grade I Ammonium Sulfate Suspension

Frontiers in Microbiology, 2021
The global food waste problem, especially aquatic product spoilage, stimulates the accurate freshness analysis of food products. However, it still remains a great challenge to realize in-field determination of fish freshness at the time of use.
Chen Guo, Shuhan You, Changmei Li, Tiantian Chen, Xiudan Wang   +4 more
doaj   +1 more source

A Highly Sensitive and Selective Probe for the Colorimetric Detection of Mn(II) Based on the Antioxidative Selenium and Nitrogen Co-Doped Carbon Quantum Dots and ABTS•+

Frontiers in Chemistry, 2021
Herein, selenium and nitrogen co-doped carbon quantum dots (Se/N-CQDs) were hydrothermally synthesized by using citric acid, histidine, and sodium selenite, which had sp3 and sp2 hybridized carbon atoms and showed excitation-dependent fluorescence ...
Qinhai Xu, Xiaolin Liu, Yanglin Jiang, Peng Wang   +3 more
doaj   +1 more source

A multi-functional chemosensor for highly selective ratiometric fluorescent detection of silver(I) ion and dual turn-on fluorescent and colorimetric detection of sulfide [PDF]

Royal Society Open Science, 2018
A multi-functional chemosensor 1 as silver and sulfide detector was synthesized by the combination of octopamine and 4-dimethylaminocinnamaldehyde. Sensor 1 exhibited a ratiometric fluorescence emission for Ag+ from blue to sky. The binding mode of 1 and
Ji Hye Kang, Ju Byeong Chae, Cheal Kim   +2 more
doaj   +1 more source

Colorimetric and Fluorescent Sensing of Copper Ions in Water through o-Phenylenediamine-Derived Carbon Dots

Sensors, 2023
Fluorescent nitrogen and sulfur co-doped carbon dots (NSCDs) were synthesized using a simple one-step hydrothermal method starting from o-phenylenediamine (OPD) and ammonium sulfide. The prepared NSCDs presented a selective dual optical response to Cu(II)
Roberto Pizzoferrato, Ramanand Bisauriya, Simonetta Antonaroli, Marcello Cabibbo, Artur J. Moro   +4 more
doaj   +1 more source

Clinical Validation of a Colorimetric Loop-Mediated Isothermal Amplification Using a Portable Device for the Rapid Detection of SARS-CoV-2

Diagnostics, 2023
Quick and reliable mass testing of infected people is an effective tool for the contingency of SARS-CoV-2. During the COVID-19 pandemic, Point-of-Care (POC) tests using Loop-Mediated Isothermal Amplification (LAMP) arose as a useful diagnostic tool. LAMP
Bruna W. Raddatz, Felipe J. Rabello, Rafael Benedetti, Gisleine J. Steil, Louise M. Imamura, Edson Y. S. Kim, Erika B. Santiago, Luís F. Hartmann, João V. Predebon, Bruna M. Delfino, Meri B. Nogueira, Jucélia S. dos Santos, Breno G. da Silva, Diego R. P. Nicollete, Bernardo M. M. de Almeida, Sergio R. Rogal, Marcus V. M. Figueredo   +16 more
doaj   +1 more source

Colorimetric Measurement of Triglycerides Cannot Provide an Accurate Measure of Stored Fat Content in Drosophila [PDF]

, 2010
Drosophila melanogaster has recently emerged as a useful model system in which to study the genetic basis of regulation of fat storage. One of the most frequently used methods for evaluating the levels of stored fat (triglycerides) in flies is a coupled ...
Andreas Bergmann, B Al-Anzi, Bader Al-Anzi, C Vieu, D Schwartz, DA Skorupa, G Barsh, JA Pospisilik, Kai Zinn, KN Bharucha, MH Sieber, NH Morley, P Jumbo-Lucioni, P Nilsson-Ehle, P Wood, P Xu, S Grönke, S Grönke, ST Harbison, W Song   +19 more
core   +10 more sources

Sodium Alginate Modified Platinum Nanozymes With Highly Efficient and Robust Oxidase-Like Activity for Antioxidant Capacity and Analysis of Proanthocyanidins

Frontiers in Chemistry, 2020
Platinum nanozymes exhibiting highly efficient and robust oxidase-like activity are successfully synthesized and modified using sodium alginate (SA-PtNPs). According to a steady-state dynamic assay, Michaelis-Menton constant (Km) is calculated as 11.6 μM,
Shao-Bin He, Liu Yang, Xiu-Ling Lin, Hua-Ping Peng, Zhen Lin, Hao-Hua Deng, Wei Chen, Guo-Lin Hong   +7 more
doaj   +1 more source