scholarly journals Analysis of plasma homocysteine levels in patients with chronic periodontitis before and after nonsurgical periodontal therapy using high-performance liquid chromatography

2020 ◽  
Vol 11 (3) ◽  
pp. 266
Author(s):  
GautamiS Penmetsa ◽  
RayapudiUday Bhaskar ◽  
Anudeep Mopidevi
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Chronic Periodontitis ◽  
High Performance ◽  
Plasma Homocysteine ◽  
Periodontal Therapy ◽  
Nonsurgical Periodontal Therapy ◽  
Before And After

scholarly journals Comparative Study of Dark Beer Before and After Freeze Drying Rehydration Cycle

2018 ◽  
Vol 72 (2) ◽  
pp. 123-127
Author(s):  
Ingmārs Cinkmanis ◽  
Guntis Gailums ◽  
Sanita Vucāne
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Phenolic Compounds ◽  
Organic Acids ◽  
High Performance ◽  
Freeze Drying ◽  
Gas Chromatography Mass Spectrometry ◽  
Before And After

Abstract The aim of the study was to compare dark beer before and after a freeze drying rehydration cycle. The pH, colour, and concentrations of extract, organic acids, and phenolic compounds were determined. Dark beer before and after freeze drying was analysed using standard brewing analysis methods of the Mitteleuropäische Brautechnische Analysenkommision (MEBAK) and two types of chromatography: high-performance liquid chromatography (HPLC) and gas chromatography mass spectrometry (GC/MS). Increase of pH was not observed in dark beer after freeze drying. Dissolved powdered beer in deionised water was clear, dark brown, without sediments, and reproduced the original commercially available dark beer, with original extract substance content 8.88%. Concentrations of the following organic acids were determined: oxalic, tartaric, quinic, malic, ascorbic, lactic, acetic, citric, fumaric, and succinic. Volatile compounds by GC/MS analysis were isolated from dark beer before and after freeze drying.

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