Dissipation and residue determination of penicillin G and its two metabolites in citrus under field conditions by DSPE/UPLC–MS/MS

2020 ◽  
Vol 34 (12) ◽  
Author(s):  
Jie Zhou ◽  
Jiao An ◽  
Chao Dong ◽  
Yaohai Zhang ◽  
Qiyang Zhao ◽  
...  
Keyword(s):  
Field Conditions ◽  
Penicillin G ◽  
Residue Determination

Residue determination of pyraclostrobin, picoxystrobin and its metabolite in pepper fruit via UPLC-MS/MS under open field conditions

2019 ◽  
Vol 182 ◽  
pp. 109445 ◽  
Author(s):  
Yangyang Gao ◽  
Song Yang ◽  
Xiaoxu Li ◽  
Lifei He ◽  
Jiamei Zhu ◽  
...  
Keyword(s):  
Open Field ◽  
Field Conditions ◽  
Residue Determination ◽  
Pepper Fruit

The oscillography of penicillin G and the determination of its purity

1953 ◽  
Vol 18 (6) ◽  
pp. 739-748 ◽  
Author(s):  
J. Heyrovský
Keyword(s):  
Penicillin G

scholarly journals ANTIMICROBIAL AND ANTIOXIDANT EFFECT OF NATURAL EXTRACTS FROM LEAVES, ROOT, STEM AND FLOWERS OF BACCHARIS LATIFOLIA FROM ECUADOR

2020 ◽  
pp. 78-84
Author(s):  
FAVIAN BAYAS-MOREJON ◽  
ANGELICA TIGRE ◽  
RIVELINO RAMON ◽  
DANILO YANEZ
Keyword(s):  
Antimicrobial Activity ◽  
Antioxidant Activity ◽  
Potassium Phosphate ◽  
Natural Antioxidants ◽  
Butylated Hydroxytoluene ◽  
Penicillin G ◽  
Diffusion Method ◽  
E Coli ◽  
Antibacterial And Antioxidant Activity

Objective: The increase in chronic and degenerative diseases and the use of synthetic antioxidants such as (butylated hydroxyanisole (BHA) or butylated hydroxytoluene (BHT)) are being restricted because they can be considered carcinogenic. Therefore, there is a growing interest in the search for natural antioxidants, especially from plants, due to their content in different bioactive compounds, such as antioxidants and antimicrobials. To evaluate the antibacterial and antioxidant activity of Baccharislatifolia extracts. Methods: For the determination of the antimicrobial activity of extracts of leaves, root, stem and flowers of Baccharislatifolia (Bl), the disk plate diffusion method was used, the strains of Listeria, Salmonella and E. coli were studied; antibiotics Penicillin G and Ciprofloxacin were the controls. For the antioxidant activity, a solution of H2O2 (Abs at 230 nm) was prepared in Potassium Phosphate Monobasic-Sodium Hydroxide buffer. Results: The antimicrobial activity against Listeria and Salmonella, showed that the extracts of leaves and flowers were more effective with inhibition zones>15 mm and>20 mm respectively. In front of E. coli, the extracts of flowers and stem were the best with zones>7.0 mm. Antibiotics studied inhibited the development of Listeria and Salmonella. However, E. coli isolates were resistant. In the antioxidant activity, the flower extract of Bl in 60 mg/ml presents a higher effect with 47.25%. Conclusion: Bl extracts from leaves and flowers were more efficient both in their antimicrobial and antioxidant capacity.

Liquid chromatography–electrospray mass spectrometry multi-residue determination of pesticides in apples and pears

1999 ◽  
Vol 830 (1) ◽  
pp. 135-143 ◽  
Author(s):  
E Lacassie ◽  
M.-F Dreyfuss ◽  
J.L Daguet ◽  
M Vignaud ◽  
P Marquet ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Liquid Chromatography ◽  
Electrospray Mass Spectrometry ◽  
Residue Determination
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