Fluorescent assay of alkaline phosphatase activity via atom transfer radical polymerizationMicrochimica Acta - Tập 189 - Trang 1-8 - 2022
Jing Lu, Daoxiang Li, Lele Ma, Mingsan Miao, Yanju Liu, Jinming Kong
A novel fluorescence assay is proposed through activators regenerated by electron transfer atom transfer radical polymerization (ARGET ATRP) strategy for alkaline phosphatase (ALP) activity detection. First of all, 2-bromo-2-methylpropionic acid (BMP) was employed as the initiator to modify on the surface of the magnetic nanoparticle (Fe3O4-MNP) by amide bonding. Then, ascorbic acid (AA) produced ...... hiện toàn bộ
Preconcentration and Recovery of Metal Ions by Donnan DialysisMicrochimica Acta - Tập 153 - Trang 117-126 - 2005
Krystyna Pyrzynska
Donnan dialysis has been demonstrated to be a useful technique for the preconcentration and recovery of metal ions. The chemical composition of both the sample and receiver solutions in terms of concentration and ionic compounds has a significant influence on the mass transfer efficiency. Illustrated by examples, approaches have been reviewed that can be used to obtain higher selectivity of metal ...... hiện toàn bộ
Dual-target electrochemical DNA sensor for detection of Pb2+ and Hg2+ simultaneously by exonuclease I–assisted recycling signal amplificationMicrochimica Acta - Tập 189 - Trang 1-11 - 2022
Yue Wang, Hongguo Zhai, Jiaqi Yin, Qi Guo, Yuhao Zhang, Qingqing Yang, Falan Li, Xia Sun, Yemin Guo, Yanyan Zhang
With the development of exonuclease, the exonuclease has been used to construct a variety of aptasensor and to realize the signal amplification. Among them, based on silver nanoparticles (Ag NPs) and exonuclease I (Exo I)-assisted cycle signal amplification strategy, we designed a novel high-sensitivity dual-target electrochemical biosensor to detect Pb2+ or Hg2+ in water. In the presence of Hg2+,...... hiện toàn bộ
Use of stainless steel absorption tubes for the semimicro carbon-hydrogen combustionMicrochimica Acta - Tập 38 - Trang 521-531 - 1951
J. A. Kuck, Mignal Arnold
A temporary shortage of soft glass absorption tubes made it necessary to see if stainless steel ones could not be substituted in the carbon-hydrogen semimicro combustion. It was also of interest to find out if metal tubes would exhibit any greater constancy of weight on the microbalance. This latter point concerns the future possibility of carbon-hydrogen ultramicro analysis where absorption tube ...... hiện toàn bộ
Determination of phosphorus and zinc in lubricating oil additivesMicrochimica Acta - Tập 64 - Trang 493-501 - 1975
Y. A. Gawargious, R. M. Habib, S. A. El-Mergawy
Methods are described for the semimicro-determination of phosphorus and zinc in lubricating oil additives, after combustion in a 1-litre flask filled with oxygen. The phosphorus method is based upon conversion of phosphate into yellow phosphovanadomolybdate and spectrophotometric measurement of its absorbance at 460 nm. Zinc is determined polarographically after conversion into the tetrahydroxozin...... hiện toàn bộ