Results 11 to 20 of about 92,945 (337)

Metabolite Ratios as Quality Indicators for Pre-Analytical Variation in Serum and EDTA Plasma

Metabolites, 2021
In clinical diagnostics and research, blood samples are one of the most frequently used materials. Nevertheless, exploring the chemical composition of human plasma and serum is challenging due to the highly dynamic influence of pre-analytical variation ...
Sven Heiling, Nadine Knutti, Franziska Scherr, Jörg Geiger, Juliane Weikert, Michael Rose, Roland Jahns, Uta Ceglarek, André Scherag, Michael Kiehntopf   +9 more
doaj   +1 more source

Downregulation of Peroxidase Activity of Platinum Cube Enables Minute–Time Scale Colorimetric Signaling of Hypoxanthine for Fish Freshness Monitoring

Foods, 2023
Due to its unique biological composition, aquatic products, especially fish, are extremely perishable compared to other muscle products. Herein, we proposed an artificial nanozyme-based colorimetric detection of hypoxanthine (Hx), the indicator of fish ...
Xiaoming Ma, Tingting Feng, Peng Zhang, Hui Zhang, Xuan Hu, Yuying Yang, Zhen Wang, Huifang Zhang, Dong Peng, Xun Li, Jianguo Xu   +10 more
doaj   +1 more source

The combination of microbiological, biochemical, and quality index methods in quality evaluation of pacific white shrimps (Litopenaeus vannamei) preserved at 0°C

Vietnam Journal of Science, Technology and Engineering, 2022
In this study, the sensory, microbiological, and biochemical qualities were used to examine the quality of Pacific white shrimps (Litopenaeus vannamei) preserved at 0°C during a 10-day period.
Nhat Tam Le, Nguyen Que Anh Huynh, Nhu Khue Doan, Thuy Xuan Uyen Phan, Ba Thanh Nguyen, Sao Mai Dam, Thi Van Thi Tran, Le phuong Lien Nguyen, Van Hai Chu, Huynh Anh Vu Truong   +9 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

Highly efficient biosynthesis of hypoxanthine in Escherichia coli and transcriptome-based analysis of the purine metabolism.

ACS Synthetic Biology, 2020
Nucleosides and purine analogs have multiple functions in cell physiology, food additives, and pharmaceuticals, and some are produced on a large scale using different microorganisms. However, biosynthesis of purines is still lacking. In the present study,
Min Liu, Yingxin Fu, Wenjie Gao, M. Xian, Guang Zhao   +4 more
semanticscholar   +1 more source

Simultaneous Determination of Xanthine and Hypoxanthine Using Polyglycine/rGO-Modified Glassy Carbon Electrode

Molecules, 2023
A novel electrochemical sensor was developed for selective and sensitive determination of xanthine (XT) and hypoxanthine (HX) based on polyglycine (p-Gly) and reduced graphene oxide (rGO) modified glassy carbon electrode (GCE). A mixed dispersion of 7 μL
Ting Wang, Lin Zhang, Chengyu Zhang, Dongmei Deng, Dejia Wang, Liqiang Luo   +5 more
doaj   +1 more source

Molecularly Imprinted Polymer-Based Electrochemical Sensor for Rapid and Selective Detection of Hypoxanthine

Biosensors, 2022
In this paper, we report on the coupling of an electrochemical transducer with a specifically designed biomimetic and synthetic polymeric layer that serves as a recognition surface that demonstrates the molecular memory necessary to facilitate the stable
Diksha Garg, Neelam Verma, Monika
doaj   +1 more source

Ischemic preconditioning attenuates portal venous plasma concentrations of purines following warm liver ischemia in man [PDF]

, 2005
Background/Aims: Degradation of adenine nucleotides to adenosine has been suggested to play a critical role in ischemic preconditioning (IPC). Thus, we questioned in patients undergoing partial hepatectomy whether (i) IPC will increase plasma purine ...
Chouker, A., Dugas, Martin, Heizmann, O., Martignoni, A., Messmer, K., Peter, K., Rau, H. G., Schauer, R. J., Thiel, M., Volk, A.   +9 more
core   +1 more source

Hypoxanthine uptake by human erythrocytes [PDF]

FEBS Letters, 1979
It is well established that the uptake of hypoxan- thin, by human erythrocytes is mediated by its incorporation into IMP [ 11. The synthesis of this nucleotide is dependent on the intracellular availability of 5phosphoribosyl o-1-pyrophosphate (PRPP) and on the activity of hypoxanthine-guanine phospho- ribosyltransferase (HGPRT) [ 11.
GIACOMELLO, Alessandro, SALERNO, Costantino   +1 more
openaire   +4 more sources

Biochemistry Changes That Occur after Death: Potential Markers for Determining Post-Mortem Interval [PDF]

, 2013
Death is likely to result in very extensive biochemical changes in all body tissues due to lack of circulating oxygen, altered enzymatic reactions, cellular degradation, and cessation of anabolic production of metabolites.
Donaldson, Andrea
core   +1 more source