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Sharma, Om P.
- Second Swadeshi Science Nobel Prize-A Mirage?
Abstract Views :231 |
PDF Views:74
Authors
Affiliations
1 CSIR-Institute of Himalayan Bioresource Technology, Post Box No. 6, Palampur 176 061, IN
1 CSIR-Institute of Himalayan Bioresource Technology, Post Box No. 6, Palampur 176 061, IN
Source
Current Science, Vol 109, No 2 (2015), Pagination: 238-239Abstract
No Abstract.Full Text
- Indian Science Congress - A Circus or a Forum for Showcasing Hard Science?
Abstract Views :321 |
PDF Views:81
Authors
Affiliations
1 CSIR-Institute of Himalayan Bioresource Technology, Post Box No. 6, Palampur 176 061, IN
1 CSIR-Institute of Himalayan Bioresource Technology, Post Box No. 6, Palampur 176 061, IN
Source
Current Science, Vol 110, No 5 (2016), Pagination: 749-750Abstract
The recent comment of Venkatraman Ramakrishnan, Nobel laureate of Indian origin and President of the Royal Society of Britain, about the Indian Science Congress (ISC), 'It was a circus. I find that it's an organization where very little science is discussed', triggered a lot of debate on the seriousness of the organization and deliberations in ISC. Perhaps, the same is relevant for meetings of some other societies in different branches of sciences in India. The media reactions varied from strongly endorsing Ramakrishnan's views to the defence of the status quo and the manner in which ISC is conducted.Full Text
- Phytoecdysteroid Profiling of Silene vulgaris by UPLC-ESI-MS
Abstract Views :214 |
PDF Views:76
Authors
Affiliations
1 Natural Products Chemistry and Process Development Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur 176 061, IN
1 Natural Products Chemistry and Process Development Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur 176 061, IN
Source
Current Science, Vol 113, No 10 (2017), Pagination: 1986-1992Abstract
Silene vulgaris is a wild edible plant consumed in both raw as well as cooked forms in several parts of Europe. The phytoconstituents of Silene species include phytoecdysteroids, triterpenoidal saponins, terpenoids, flavonoids and phenolics. Silene vulgaris is a relatively unexplored species and the chemical profiling of this plant has not been attempted so far. Hence the UPLC-ESI-MS approach was applied to the extracts of flowers, leaves and ischolar_mains of S. vulgaris for the profiling of phytoecdysteroids. The relative distribution of these compounds varied between flowers and leaves; however, the qualitative composition was similar. Only traces of phytoecdysteroids were present in the ischolar_mains. The aglycones, sugars and other moieties were determined on the basis of ESI-MS. A total of eight previously known phytoecdysteroids were identified. Partial characterization of eight other phytoecdysteroids was also attempted.Keywords
Chemical Profiling, Chromatographic Analysis, Phytoecdysteroids, Silene vulgaris.Full Text
References
- Madl, T., Sterk, H., Mittelbach, M. and Rechberger, G. N., Tandem mass spectrometric analysis of a complex triterpene saponin mixture of Chenopodium quinoa. J. Am. Soc. Mass Spectrom., 2006, 17(6), 795–806.
- Glensk, M., Wray, V., Nimtz, M. and Schopke, T., Silenosides, A. C., triterpenoid saponins from Silene vulgaris. J. Nat. Prod., 1999, 62(5), 717–721.
- Richardson, M., Flavonols and C-glycosylflavonoids of the Caryophyllales. Biochem. Syst. Ecol., 1978, 6(4), 283–286.
- Mamadalieva, N. Z., Lafont, R. and Wink, M., Diversity of secondary metabolites in the genus Silene L. (Caryophyllaceae) – structures, distribution and biological properties. Diversity, 2014. 6(3), 415–499.
- Alarcon, R., Ortiz, L. T. and Garcia, P., Nutrient and fatty acid composition of wild edible bladder campion populations [Silene vulgaris (Moench.) Garcke]. Int. J. Food Sci. Technol., 2006. 41(10), 1239–1242.
- Tardio, J., Pascual, H. and Morales, R., Wild food plants traditionally used in the province of Madrid, Central Spain. Econ. Bot., 2005, 59(2), 122–136.
- Bajguz, A., Bakala, I. and Talarek, M., Ecdysteroids in plants and their pharmacological effects in vertebrates and humans in studies. In Natural Products Chemistry (ed. Atta-ur-Rahman), Elsevier, The Netherlands, 2015, pp. 121–145.
- Mamadalieva, N. Z., Phytoecdysteroids from Silene plants: distribution, diversity and biological (antitumour, antibacterial and antioxidant) activities. Bol. Latinoam. Caribe Plant. Med. Aromat., 2012, 11(6), 474–497.
- Zibareva, L., Volodin, V., Saatov, Z., Savchenko, T., Whiting, P., Lafont, R. and Dinan, L., Distribution of phytoecdysteroids in the Caryophyllaceae. Phytochemistry, 2003, 64(2), 499–517.
- Zibareva, L., Distribution and levels of phytoecdysteroids in plants of the genus Silene during development. Arch. Insect. Biochem. Physiol., 2000, 43(1), 1–8.
- Figueiredo, R. C., Barroso, J. G., Pedro, L. G. and Scheffer, J. J. C., Factors affecting secondary metabolite production in plants: volatile components and essential oils. Flavour. Frag. J., 2008, 23, 213–226.
- Carini, M., Facino, R. M., Aldini, G., Calloni, M. and Colombo, L., Characterization of phenolic antioxidants from Mate (Ilex paraguayensis) by liquid chromatography/mass spectrometry and liquid chromatography/tandem mass spectrometry. Rapid Commun. Mass Spectrom. 1998, 12(22), 1813–1819.
- Mulder, M. M., Van Der Hage, E. R. E. and Boon, J. J., Analytical in-source pyrolytic methylation electron impact mass spectrometry of phenolic acids in biological matrices. Phytochem. Anal., 1992, 3(4), 165–172.
- Clifford, M. N., Zheng, W. and Kuhnert, N., Profiling the chlorogenic acids of ester by HPLC-MSn. Phytochem. Anal., 2006, 17(6), 384–393.
- Wang, P., Li, S., Ownby, S., Zhang, Z., Yuan, W., Zhang, W. and Beasley, R. S., Ecdysteroids and a sucrose phenylpropanoid ester from Froelichia floridana. Phytochemistry, 2009, 70(3), 430–436.
- Nilufar, Z. M. et al., New minor ecdysteroids from Silene viridiflora. Collect. Czechoslo. Chem. Commun., 2004, 69, 1675–1680.
- Suksamrarn, A., Wilkie, J. S. and Horn, D. H. S., Blechnosides A and B: ecdysteroid glycosides from Blechnum minus. Phytochemistry, 1986, 25(6), 1301–1304.
- Ho, R., Girault, J.-P., Cousteau, P.-Y., Bianchini, J.-P., Raharivelomanana, P. and Lafont, R., Isolation of a new class of ecdysteroid conjugates (glucosyl-ferulates) using a combination of liquid chromatographic methods. J. Chromatogr. Sci., 2008, 46(2), 102–110.
- Ho, R., Girault, J.-P., Raharivelomanana, P. and Lafont, R., E- and Z-isomers of new phytoecdysteroid conjugates from French Polynesian Microsorum membranifolium (Polypodiaceae) fronds. Molecules, 2012, 17(10), 11598–11606.
- Simon, A., Vanyolos, A., Beni, Z., Dekany, M., Toth, G. and Bathori, M., Ecdysteroids from Polypodium vulgare L. steroids, 2011, 76(13), 1419–1424.
- Wu, P., Xie, H., Tao, W., Miao, S. and Wei, X., Phytoecdysteroids from the rhizomes of Brainea insignis. Phytochemistry, 2010, 71(8), 975–981.
- Wu, J.-J. et al., Steroidal saponins and ecdysterone from Asparagus filicinus and their cytotoxic activities. Steroids, 2010, 75(10), 734–739.
- 5α/5β Stereochemistry of Spirostanol and Furostanol Saponins
Abstract Views :300 |
PDF Views:78
Authors
Affiliations
1 Natural Products Chemistry and Process Development Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur 176 061, IN
2 Near Neugal Chowk, P.O. Bandla, Tea Estate, Palampur - 176 061, IN
1 Natural Products Chemistry and Process Development Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur 176 061, IN
2 Near Neugal Chowk, P.O. Bandla, Tea Estate, Palampur - 176 061, IN
Source
Current Science, Vol 115, No 4 (2018), Pagination: 618-621Abstract
Steroidal saponins constitute an important class of plant secondary metabolites and are mostly found in monocotyledonous angiosperms. These compounds are known to possess a vast array of bioactivities, including anticancer, adjuvant, immunostimulant, anti-inflammatory, antimicrobial, hypocholesterolaemic, antimicrobial and antioxidant1,2. Structurally, steroidal saponins are classified as spirostanol and furostanol glycosides3. A third and relatively less common class of steroidal saponins is furospirostanols. The saponins of this class generally have a polyoxygenated A-ring and/or one or more double bonds present in the rings A and B4.Full Text
References
- Sparg, S. G., Light, M. E. and van Staden, J., J. Ethnopharmacol., 2004, 94, 219–243.
- Rao, A. V. and Gurfinkel, D. M., Drug Metab. Drug Interact., 2000, 17(1–4), 211–235.
- Munafo Jr, J. P. and Gianfagna, T. J., Nat. Prod. Rep., 2015, 32, 454–477.
- Xu, T. H. et al., J. Asian Nat. Prod. Res., 2008, 10(5), 415–418.
- Agrawal, P. K., Jain, D. C. and Pathak, A. K., Magn. Reson. Chem., 1995, 33(12), 923–953.
- Agrawal, P. K., Bunsawansong, P. and Morris, G. A., Phytochemistry, 1998, 47(2), 255–257.
- Agrawal, P. K., Steroids, 2005, 70(10), 715–724.
- Agrawal, P. K., Magn. Reson. Chem., 2003, 41(11), 965–968.
- Agrawal, P. K., Magn. Reson. Chem., 2004, 42(11), 990–993.
- Chen, P. Y., Chen, C. H., Kuo, C. C., Lee, T. H., Kuo, Y. H. and Lee, C. K., Planta Med., 2011, 77(9), 929–933.
- Yu, H. S. et al., Helv. Chim. Acta, 2011, 94(7), 1351–1358.
- Eskander, J., Lavaud, C. and Harakat, D., Fitoterapia, 2010, 81(5), 371–372.
- Zhang, C. L., Gao, J. M. and Zhu, W., Phytochem. Lett., 2012, 5(1), 49–52.
- Naveed, M. A., Riaz, N., Saleem, M., Jabeen, B., Ashraf, M., Ismail, T. and Jabbar, A., Steroids, 2014, 83, 45–51.
- Yokosuka, A. and Mimaki, Y., Phytochemistry, 2009, 70(6), 807–815.
- Da Silva, B. P., Valente, A. P. and Parente, J. P., Nat. Prod. Res., 2006, 20(04), 385–390.
- Jin, J. M., Liu, X. K. and Yang, C. R., J. Asian Nat. Prod. Res., 2003, 5(2), 95–103.
- Jin, J. M., Zhang, Y. J. and Yang, C. R., J. Nat. Prod., 2004, 67(1), 5–9.
- Mandal, D., Banerjee, S., Mondal, N. B., Chakravarty, A. K. and Sahu, N. P., Phytochemistry, 2006, 67(13), 1316–1321.
- Sharma, U., Saini, R., Kumar, N. and Singh, B., Chem. Pharm. Bull., 2009, 57(8), 890–893.
- Zhang, Y., Yang, C. R. and Zhang, Y. J., Helv. Chim. Acta, 2013, 96(9), 1807–1813.
- Guo-Lei, Z. H. U., Qian, H. A. O., RongTao, L. I. and Hai-Zhou, L. I., Chin. J. Nat. Med., 2014, 12(3), 213–217.
- Zhou, W. B. et al., J. Asian Nat. Prod. Res., 2010, 12(11), 955–961.
- Yokosuka, A., Jitsuno, M., Yui, S., Yamazaki, M. and Mimaki, Y., J. Nat. Prod., 2009, 72(8), 1399–1404.