title: Modulation of physicochemical and spectroscopic properties of l-serine and l-proline by propionate based food preservatives.
abstract: To have an insight into the effect of preservatives on various ingredients of processed items, it is important to study their thermodynamic, transport and spectroscopic properties in aqueous solutions to elucidate various solute-co-solute interactions. The densities, viscosities and enthalpies of dilution of l-serine and l-proline have been determined in water and in aqueous solutions of sodium propionate and calcium propionate at different temperatures. The derived parameters elucidate the changes in taste quality and hydration number of l-serine and l-proline in the presence of the studied preservatives. Predominance of dehydration effect has been observed from calorimetry and changes in chemical shifts from nuclear magnetic resonance spectroscopy also support the above results.
authors.affiliation: Department of Chemistry, Guru Nanak Dev University, Amritsar 143005, Punjab, India. Electronic address: tsbanipal@yahoo.com.
authors.forename: Tarlok S
authors.initials: TS
authors.lastname: Banipal
authors.affiliation: Department of Chemistry, Guru Nanak Dev University, Amritsar 143005, Punjab, India.
authors.forename: Navalpreet
authors.initials: N
authors.lastname: Kaur
authors.affiliation: Department of Chemistry, Guru Nanak Dev University, Amritsar 143005, Punjab, India.
authors.forename: Jaspreet
authors.initials: J
authors.lastname: Kaur
authors.affiliation: Department of Chemistry, Guru Nanak Dev University, Amritsar 143005, Punjab, India.
authors.lastname: Komal
authors.affiliation: Department of Chemistry, Guru Nanak Dev University, Amritsar 143005, Punjab, India.
authors.forename: Parampaul K
authors.initials: PK
authors.lastname: Banipal
mesh_terms: D005520:Food Preservatives / Q000032:analysis*; D011392:Proline / Q000032:analysis*; D011422:Propionates / Q000032:analysis*; D012694:Serine / Q000032:analysis*; D013816:Thermodynamics
chemical_list: D005520:Food Preservatives; D011422:Propionates; D012694:Serine; C514136:calcium propionate; D011392:Proline; C514135:sodium propionate
keywords: Amino acids; Calcium propionate (PubChem CID: 19999); Enthalpy of dilution; Hydration number; Nuclear magnetic resonance spectroscopy; Preservative; Sodium propionate (PubChem CID: 16213474); Taste quality; l-proline (PubChem CID: 145742); l-serine (PubChem CID: 5951)