2,3-Diaza-1,3-dienes (Azines) as Substrates for the Staudinger Reaction. Synthesis and Reactivity of N-Imino-.beta.-lactams

1994 ◽  
Vol 59 (26) ◽  
pp. 8003-8010 ◽  
Author(s):  
Benito Alcaide ◽  
Miguel Miranda ◽  
Javier Perez-Castells ◽  
Concepcion Polanco ◽  
Miguel A. Sierra
Keyword(s):  
Reaction Synthesis ◽  
Staudinger Reaction ◽  
Beta Lactams

Modulating steric effects in diastereoselective Staudinger reaction: Synthesis of optically pure cis-β-lactams

Tetrahedron ◽  
1996 ◽  
Vol 52 (10) ◽  
pp. 3741-3756 ◽  
Author(s):  
M. Jayaraman ◽  
V. Srirajan ◽  
A.R.A.S. Deshmukh ◽  
B.M. Bhawal
Keyword(s):  
Steric Effects ◽  
Reaction Synthesis ◽  
Staudinger Reaction ◽  
Optically Pure

ChemInform Abstract: 2,3-Diaza-1,3-dienes (Azines) as Substrates for the Staudinger Reaction. Synthesis and Reactivity of N-Imino-β-lactams.

ChemInform ◽  
2010 ◽  
Vol 26 (36) ◽  
pp. no-no
Author(s):  
B. ALCAIDE ◽  
M. MIRANDA ◽  
J. PEREZ-CASTELLS ◽  
C. POLANCO ◽  
M. A. SIERRA
Keyword(s):  
Reaction Synthesis ◽  
Staudinger Reaction

ChemInform Abstract: Modulating Steric Effects in Diastereoselective Staudinger Reaction: Synthesis of Optically Pure cis-β-Lactams.

ChemInform ◽  
2010 ◽  
Vol 27 (27) ◽  
pp. no-no
Author(s):  
M. JAYARAMAN ◽  
V. SRIRAJAN ◽  
A. R. A. S. DESHMUKH ◽  
B. M. BHAWAL
Keyword(s):  
Steric Effects ◽  
Reaction Synthesis ◽  
Staudinger Reaction ◽  
Optically Pure

Identification of antibiotics in meat. Flow cytometry capabilities

Vsyo o myase ◽  
2020 ◽  
pp. 56-60
Author(s):  
Zayko E.V. ◽  
◽  
Kuznetsova O.A. ◽  
Bataeva D.S. ◽  
Grudistova M.A. ◽  
...  
Keyword(s):  
Raw Materials ◽  
Animal Husbandry ◽  
Flow Cytometer ◽  
Poultry Meat ◽  
Meat Processing ◽  
Beta Lactams ◽  
Antimicrobial Substances ◽  
Chemotherapy Drugs ◽  
Processing Plants ◽  
Meat Samples

The problem of the uncontrolled use of antibiotics currently remains unresolved. Step-by-step monitoring of meat using modern methods will reduce the risk of using contaminated meat raw materials for food production. Qualitative monitoring will identify samples containing residual antimicrobial substances. The use of methods for identifying groups of antibiotics will help narrow the search for antibiotics by expensive chromatographic methods. A study was carried out of beef, pork and poultry meat, which is used in meat processing plants in the production of raw smoked sausages, using two methods. At the first stage, using a qualitative microbiological method, the raw meat was evaluated for the presence of antimicrobial substances, then their group was determined using a NovoCyte flow cytometer. According to the results of a study on a flow cytometer, it was found that out of 10 groups of antibiotics that can be determined by the tested method, the group of lincosamides was not found in all meat samples. The most common groups of chemotherapy drugs in pork were sulfonamides – 29.6 %, tetracycline group – 18.5 % and beta-lactams – 14.8 %, and in beef aminoglycosides – 36.7 %, phenicols – 30 % and beta-lactams – 13.3 %. In poultry meat samples, the most common were sulfonamides – 23.2 %, fenicols – 23.2 %, and beta-lactams – 16 %. Five groups of antibiotics were found in all studied types of meat: fenicols, β-lactams, macrolides, polypeptide antibiotics, and quinolones. This indicates their widespread use in animal husbandry and poultry farming.

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