fixation reaction
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2022 ◽  
Vol 56 ◽  
pp. 101867
Author(s):  
Yongjing Hao ◽  
Xiuli Yan ◽  
Xiaohuan Liu ◽  
Shenjun Qin ◽  
Zheng Zhu ◽  
...  

2021 ◽  
Vol 25 (11) ◽  
pp. 1237-1238
Author(s):  
A. Dmitriev

Alf. Cohn (Derm. Ztschr. Bd. 55, H. 2) gives detailed instructions for the preparation of a specific antigen, patient serum, and also describes in detail the technique of the Bordet-Gengou reaction itself. The author received as a result of his observations with acute gonorrhea in men 40% pos. responses, for chronic 60% and for complicated 80-100%. The results are especially demonstrative in gonorrhoid arthritis (100%). It is important to use the reaction in doubtful cases, when microscopic and bacteriological examinations do not give the necessary answer for making a diagnosis. If people who do not have gonorrhea are vaccinated, the reaction may be positive. If a positive reaction persists for months or years, you need to look for a focus with gonococci. According to the author, the complement fixation reaction cannot replace the previously tested diagnostic methods, but it complements them. Together with bacteriological and clinical research methods, the reaction sometimes helps to understand the diagnosis of difficult cases.


Author(s):  
Iryna Kovalenko ◽  
◽  
Olena Kril ◽  
Olena Korniychuk ◽  
◽  
...  

The experimental period in the history of immunology as a science can be attributed to the years of scientific activity of the world-famous bacteriologist and immunologist Jules Bordeaux, who was the first to experimentally prove the physicochemical nature of such immune reactions as agglutination, hemolysis, precipitation. He was also involved in revealing the nature of phagocytosis reactions and established the relationship between the virulence of the microorganism and the presence of a capsule and phagocytosis. Owing to the discovery of Jules Bordeaux, mankind became aware of the cytotoxic properties of blood serum. Bordeaux’s scientific heritage was the elucidation of the role of complement in immunological processes, which was proved experimentally during the work of a young scientist at the Pasteur Institute in the laboratory of I. I Mechnikov, who considered J. Bordeaux one of his favorite students. In collaboration with Octave Zhangou, the complement fixation reaction underlying Wasserman’s reaction was first proposed. Bordeaux is well known around the world for the «driving force» of immunity — the connection of antigen to antibody. He can be regarded as one of the founders of the method of serodiagnosis. Bordeaux was the director of the Pasteur Institute in Brussels for 35 years, the world’s only autonomous Pasteur Institute unrelated to Paris. Jules Bordeaux’s scientific legacy continued and became the basis for many epoch-making discoveries in medicine, including the explanation of the mechanisms of anaphylaxis, the study of blood clotting, the discovery of blood groups, etc. The theoretical substantiation of immunological reactions became the beginning of a new diagnostic direction in laboratory practice — immunoassay, which includes thousands of modern laboratory methods


2021 ◽  
Vol 6 (21) ◽  
pp. 5350-5355
Author(s):  
Yihan Tang ◽  
Wang Chen ◽  
Ruoxi Liu ◽  
Leyao Wang ◽  
Yating Pan ◽  
...  

Water ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 675
Author(s):  
Michael Toni Sturm ◽  
Harald Horn ◽  
Katrin Schuhen

Due to the fact, that microplastics are a global environmental problem, new ways for their removal from water, soil and air need to be developed. New materials in combination with easy to implement technologies for microplastic removal come into the focus of scientific studies and engineering, especially for application in water resources. In our comparative case study, the effects of water composition and temperature on the agglomeration-fixation reaction of microplastics using organosilanes were examined. We compared biologically treated municipal wastewater, seawater and demineralized water at temperatures ranging from 7.5–40 °C. Temperature variations and tested water compositions showed no negative effect on microplastic removal. The residues of the organosilanes remaining in the water after the fixation process were monitored using ICP-OES and DOC measurements. Only one of the organosilanes tested showed no dissolved residues in the waters. Microplastic encompasses a multitude of different types of polymers with different properties and surface chemistries. Therefore, we compared the efficiency of the process for polyethylene, polypropylene, polyamide, polyester, and polyvinylchloride as examples of common polymer types with different chemical compositions. A strong effect of the polarity of microplastics and organosilanes on removal efficiency was observed. The organic groups of organosilanes can be chemically adapted to different polymer types.


2021 ◽  
Author(s):  
Faezeh Taghavi ◽  
Amir Khojastehnezhad ◽  
Reza Khalifeh ◽  
Maryam Rajabzadeh ◽  
Fahimeh Rezaei ◽  
...  

The first report of the use of an acidic magnetic metal organic framework for the chemical fixation of CO2 as an environmentally friendly reaction.


2021 ◽  
Author(s):  
Sabuj Kanti Das ◽  
Anirban Ghosh ◽  
Sudip Bhattacharjee ◽  
Avik Chowdhury ◽  
Partha Mitra ◽  
...  

Metal-organic frameworks (MOFs) containing multiple carboxylate and sulfonate linkers together with positively charged rare earth metals can offer new opportunities in heterogeneous catalysis. High efficiency of CO2 fixation reaction at...


RSC Advances ◽  
2021 ◽  
Vol 11 (48) ◽  
pp. 30222-30228
Author(s):  
Tao Chang ◽  
Xiaopeng Li ◽  
Yongjing Hao ◽  
Lianwei Kang ◽  
Tian Tian ◽  
...  

The synergistic interaction of g-C3N4 and PABs plays an important role in the CO2 fixation reaction with epoxides.


Author(s):  
Yongjing Hao ◽  
Xiuli Yan ◽  
Zheng Zhu ◽  
Tao Chang ◽  
Xiaocai Meng ◽  
...  

The synergistic interaction of KI and NUPs plays an important role in the fixation reaction of CO2 and epoxides.


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