Results 1 to 10 of about 193,200 (241)

Alzheimer-mutant γ-secretase complexes stall amyloid β-peptide production [PDF]

eLife
Missense mutations in the amyloid precursor protein (APP) and presenilin-1 (PSEN1) cause early-onset familial Alzheimer’s disease (FAD) and alter proteolytic production of secreted 38-to-43-residue amyloid β-peptides (Aβ) by the PSEN1-containing γ ...
Parnian Arafi, Sujan Devkota, Emily Williams, Masato Maesako, Michael S Wolfe   +4 more
doaj   +2 more sources

Research Progress of Fluorescence Spectrum Analysis Technology in Food Detection

Shipin gongye ke-ji, 2022
As a testing technology for food, fluorescence spectrometry has the advantages of convenient, sensitive and efficient detection of complex and trace components in food.
Xin SHI, Yongkang LUO, Jiaran ZHANG, Ce SHI, Zhiyao ZHAO   +4 more
doaj   +1 more source

The correlation analysis of TOC, CODCr and fluorescence characteristics in MPR [PDF]

E3S Web of Conferences, 2020
Water samples from different biochemical reaction time in one reactor period in Micro-Pressure Inner-Loop Bioreactor (MPR) were measured respectively with adopt Excitation-emission matrix (EEM) fluorescence spectroscopy, Total organic carbon (TOC) and ...
Tian Xi, Liu Ying, Zhao Chunling, Ji Xiaona, Ren Zhiming, Bian Dejun   +5 more
doaj   +1 more source

OVERVIEW OF X-RAY FLUORESCENCE SPECTROMETRY [PDF]

Fiabilitate şi Durabilitate, 2021
One of the techniques used in identifying the constituent chemical elements of a material is the X-ray fluorescence method. From the analysis of X-ray fluorescence data the energy and intensity of the characteristic photons emitted by the sample can be
Nicoleta-Maria MIHUȚ, Cătălina IANĂȘI   +1 more
doaj  

Two-Photon Excited Fluorescence of NADH-Alcohol Dehydrogenase Complex in a Mixture with Bacterial Enzymes

Biomolecules, 2023
Thorough study of composition and fluorescence properties of a commercial reagent of active equine NAD-dependent alcohol dehydrogenase expressed and purified from E. coli has been carried out. Several experimental methods: spectral- and time-resolved two-
Ioanna A. Gorbunova, Maxim E. Sasin, Dmitry V. Yachkov, Denis A. Volkov, Alexei D. Vedyaykin, Andrey A. Nikiforov, Oleg S. Vasyutinskii   +6 more
doaj   +1 more source

Rapid detection of arsenic, cadmium and lead content in wheat flour by portable high-sensitivity X-ray fluorescence spectroscopy technology

Zhongguo shipin weisheng zazhi, 2022
ObjectiveA portable high-sensitivity X-ray fluorescence spectrometry method was established to directly and quickly determine the content of arsenic， cadmium and lead in wheat flour.MethodsPart of the sample was put into the sample cup， and then directly
ZHONG Hailin, ZHANG Runhe, ZHAO Chaomin, NIU Bing, FAN Xiang, CAI Wenxuan, WU Chiying, XU Xiaowei, DENG Xiaojun   +8 more
doaj   +1 more source

Naturally occurring fluorescence in transparent insect wings [PDF]

Journal of Luminescence 254, 119490, 2023, 2021
In spite of the crucial role it is believed to play in nature, fluorescence in natural organisms remains under-investigated from optical, chemical and biological perspectives. One example is the transparent wings of insects from the order Hemiptera: fluorescence emission has so far not been reported in any of the 3,000 described species of the ...
arxiv   +1 more source

Cucurbituril—assisted sensitive fluorescence detection and quantitation of naproxen drug in wastewater samples: Guest-host characterization and HPLC investigation

Frontiers in Chemistry, 2022
Sensitive spectrofluorometric and liquid chromatography with fluorescence detection methods have been developed for detection and determination of naproxen drug in the presence of cucurbit7uril (CB7).
Mohammed A. Meetani, Ahmad Alhalabi, Mohammed K. Al-Tabaji, Abdulla Al-Hemyari, Haythem A. Saadeh, Na’il Saleh   +5 more
doaj   +1 more source

Quantitative detection and isolation of Legionella pneumophila in environmental water sample by Legiolert enzyme substrate method combined with mass spectrometry

Zhongguo linchuang yanjiu, 2023
Objective To investigate the application of Legiolert enzyme-substrate method with mass spectrometry in direct quantitative detection and separation of Legionella pneumophila in environmental water samples.
JIN Ping, GE Teng, YE Yan-hua, SI Jia-li, JIANG Xiao, ZHANG Hong-ying
doaj   +1 more source

The Use of Fluorescence Spectrometry to Determine the Botanical Origin of Filtered Honeys

Molecules, 2020
The aim of this study was to determine whether fluorescence spectrometry can be used to identify the botanical origin of filtered honeys. Sixty-two honey samples with different botanical origins, both filtered and unfiltered, were investigated in order ...
Aleksandra Wilczyńska, Natalia Żak
doaj   +1 more source