Neera is the sweet juice or sap, obtained by tapping the unopened inflorescence of the coconut palm and is rich in minerals. In order to improve the nutritional quality and acceptability of the product a trial was car...Neera is the sweet juice or sap, obtained by tapping the unopened inflorescence of the coconut palm and is rich in minerals. In order to improve the nutritional quality and acceptability of the product a trial was carried out to combine aloe cubes and strawberry flavour with neera. Aloe vera is a flavourless and translucent white soft gel with bland taste and rich in phytonutrients and electrolytes. Standard neera （SN） was prepared with neera alone （100%） and compared against experimental neera （EN） prepared with neera （87%）, aloe vera cubes （10%） and strawberry extract （3%）. The processed neera was packed in presterilized bottles and stored at 5 ℃. Organoleptic acceptability and storage stability study were carried out every week. Physicochemical characteristics and selected nutrient content were analysed on 0th day and at the end of storage period. Overall acceptability of EN （8.5 ± 0.53） was higher than SN （8 ± 0.82） on 0th day and over different storage periods. There was a gradual decrease in the organoleptic scores of both EN and SN on storage and it was unacceptable on 56th day of storage. The sodium, potassium and vitamin C content of EN were significantly higher than SN. The TSS of SN and EN were 14 ± 0°B/100 mL and 15.6 ± 0 °B/100 mL respectively on 0th day. Significant （p ≤0.01） increase in the microbial count in EN was noticed on storage.展开更多
A novel potential tridentate Schiff base was prepared by condensing equimolar quantities of 2-hydroxyacetophenone and 2-aminopyrimidine in methanol. This ligand was versatile in forming a series of complexes with lant...A novel potential tridentate Schiff base was prepared by condensing equimolar quantities of 2-hydroxyacetophenone and 2-aminopyrimidine in methanol. This ligand was versatile in forming a series of complexes with lanthanide ions such as La（III）, Pr（III）, Nd（III）, Sm（III）, Gd（III）, Dy（III） and Yb（III）. The ligand and the metal complexes were characterized through elemental analysis, molar conductance, UV-Visible, IR, 1H NMR, and mass spectral studies. The spectral studies indicated that the ligand was coordinated to the metal ion in neutral tridentate fashion through the azomethine nitrogen, one of the nitrogen atoms in the pyrimidine ring and the phenolic oxygen without deprotonation. Thermal decomposition and luminescence property of lanthanum（III） complex were also examined. The X-ray diffraction patterns showed the crystalline nature of the ligand and its lanthanum（III） complex. The DNA cleavage studies of the ligand and the metal complexes were carried out and it was observed that the lanthanum（III） and neo-dymium（III） complexes cleaved the pUC19 DNA effectively. The ligand and the metal complexes were screened for their antibacte-rial activities. The metal complexes were found to be more potent bactericides than the ligand.展开更多
Integration of green chemistry principles to nanotechnology is one of the key issues in nanoscience research. The development of the concept of green nanoparticle preparation has been growingly needed for environmenta...Integration of green chemistry principles to nanotechnology is one of the key issues in nanoscience research. The development of the concept of green nanoparticle preparation has been growingly needed for environmentally benign metal nanoparticle synthesis protocols to avoid adverse effects in medical applications. Keep this in mind, in the present study, silver nanoparticles were synthesized using Solanum lycopersicums fruit extract. The prepared silver nanoparticles were characterized by UV-visible spectroscopy, Fourier transform infrared spectroscopy, Raman spectroscopy, scanning electron microscopy and transmission electron microscopy techniques. The surface plasmon resonance peak was found at 445 nm. The synthesized silver nanoparticles were spherical in shape with the average size of 10 nm. The citric acid present in S. lycopersicums fruit extract acted as reducing agent and malic acid was responsible for capping of the bioreduced silver nanoparticles.展开更多
文摘Neera is the sweet juice or sap, obtained by tapping the unopened inflorescence of the coconut palm and is rich in minerals. In order to improve the nutritional quality and acceptability of the product a trial was carried out to combine aloe cubes and strawberry flavour with neera. Aloe vera is a flavourless and translucent white soft gel with bland taste and rich in phytonutrients and electrolytes. Standard neera （SN） was prepared with neera alone （100%） and compared against experimental neera （EN） prepared with neera （87%）, aloe vera cubes （10%） and strawberry extract （3%）. The processed neera was packed in presterilized bottles and stored at 5 ℃. Organoleptic acceptability and storage stability study were carried out every week. Physicochemical characteristics and selected nutrient content were analysed on 0th day and at the end of storage period. Overall acceptability of EN （8.5 ± 0.53） was higher than SN （8 ± 0.82） on 0th day and over different storage periods. There was a gradual decrease in the organoleptic scores of both EN and SN on storage and it was unacceptable on 56th day of storage. The sodium, potassium and vitamin C content of EN were significantly higher than SN. The TSS of SN and EN were 14 ± 0°B/100 mL and 15.6 ± 0 °B/100 mL respectively on 0th day. Significant （p ≤0.01） increase in the microbial count in EN was noticed on storage.
文摘A novel potential tridentate Schiff base was prepared by condensing equimolar quantities of 2-hydroxyacetophenone and 2-aminopyrimidine in methanol. This ligand was versatile in forming a series of complexes with lanthanide ions such as La（III）, Pr（III）, Nd（III）, Sm（III）, Gd（III）, Dy（III） and Yb（III）. The ligand and the metal complexes were characterized through elemental analysis, molar conductance, UV-Visible, IR, 1H NMR, and mass spectral studies. The spectral studies indicated that the ligand was coordinated to the metal ion in neutral tridentate fashion through the azomethine nitrogen, one of the nitrogen atoms in the pyrimidine ring and the phenolic oxygen without deprotonation. Thermal decomposition and luminescence property of lanthanum（III） complex were also examined. The X-ray diffraction patterns showed the crystalline nature of the ligand and its lanthanum（III） complex. The DNA cleavage studies of the ligand and the metal complexes were carried out and it was observed that the lanthanum（III） and neo-dymium（III） complexes cleaved the pUC19 DNA effectively. The ligand and the metal complexes were screened for their antibacte-rial activities. The metal complexes were found to be more potent bactericides than the ligand.
文摘Integration of green chemistry principles to nanotechnology is one of the key issues in nanoscience research. The development of the concept of green nanoparticle preparation has been growingly needed for environmentally benign metal nanoparticle synthesis protocols to avoid adverse effects in medical applications. Keep this in mind, in the present study, silver nanoparticles were synthesized using Solanum lycopersicums fruit extract. The prepared silver nanoparticles were characterized by UV-visible spectroscopy, Fourier transform infrared spectroscopy, Raman spectroscopy, scanning electron microscopy and transmission electron microscopy techniques. The surface plasmon resonance peak was found at 445 nm. The synthesized silver nanoparticles were spherical in shape with the average size of 10 nm. The citric acid present in S. lycopersicums fruit extract acted as reducing agent and malic acid was responsible for capping of the bioreduced silver nanoparticles.
