 DR.S.ARAVAMUDHAN http://www.ugc-inno-nehu.com/ |
 BIODATA CONTACT INFO Curriculum Vitae/Resume webpages_list http://nehuacin.tripod.com Phone Mobile: +919862053872 EMAIL:- inboxnehu_sa@yahoo.com saravamudhan@hotmail.com aram1121944@gmail.com |
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A project proposal to the Centre for Bioinformatics, NEHU
North East Indian Medicinal Plant Chemistry & Conservation: The Use of NMR
Technology as aid for the required processing
http://aravamudhan-s.ucoz.com/nmr_oil_coal/nmr_oil_coal_proceedings.html
http://aravamudhan-s.ucoz.com/nmr_for_oil_and_coal.html
S.Aravamudhan
Department of Chemistry, North Eastern Hills University, Shillong 793022 Meghalaya INDIA
Email:inboxnehu_sa@yahoo.com
1. Standardization of herbal medicines
2. Bio-prospecting Natural Products for Medicinal properties
3. Bio-prospecting and Search for New Chemical Entity [NCE]
4. Computer aided storage and retrieval systems-generating data bases
5. Prospecting Genomes for Bioactive Molecules
6. Computer aided storage and retrieval systems-generating data bases
7. Prospecting Genomes for Bioactive Molecules
All the above listed medicinal plant aspects concern with identifying and characterizing Chemical Entities, and trying to know the extent possible the detailed characteristic chemical transformations which are responsible for specific medicinal effectiveness of the formulations. It is in general the holistic approach [ Jump to related Reports on NMR Techniques ]which practically enables categorizing and using the plant species for their medicinal effectiveness. It is not possible to discard with this traditional method altogether since it is this method which reveals the possibility of what ever potential modern technological tools have in improving the situation for the conservation and utilization of medicinal plants.
Nuclear Magnetic Resonance is a Spectroscopic tool for the study of molecules for their Structure and Reactivity. The NMR has been found to be such a potential tool for the macromolecules, the biologically significant macromolecules in particular, that efforts are made to develop sophisticated instrumentation requiring advanced technological inputs. This type of developing instruments is possible in the NMR regime which in turn unfolds several new techniques based on the Nuclear Magnetic Resonance phenomenon involving theory and experiment. The interpretative potential and inferences from the currently available NMR spectroscopic resources seems to be limited only by the extent to which the user wants to look for the details rather than the actual applicability of the NMR technique.
To emphasize and substantiate the importance of NMR as extold above it suffices to cite two instances of scientific gathering held in INDIA as below.
1. A workshop on ?NMR in the Post-genomic Era? was held in Lucknow in the year 2002 which was a Indo-Italian collaborative effort.
2. A Symposium on ?NMR, Drug Design and Bioinformatics? was held in the year 2004 at Saha Institute of Nuclear Physics at Kolkata
A glance through the program and lecture titles would reveal the extent to which NMR can be useful in such studies.
References 1 &2 cited at the end of this description, and the references therein, indicate that specific approaches are being initiated and tested using NMR technique which conforms to the trends of holistic approach prevalent in traditional practices, while the capability of NMR methods for the molecular level characterizations has been unequivocally established. Thus when it becomes necessary to acquire such detailed molecular level informations for standardizing medicinal plant materials, the NMR technique would not be found wanting while the traditional methods have a severe drawback for such detailed studies. Hence it seems that an effort, to adapt the NMR technique for what prevails in traditional practices in standardizing medicinal plant materials with the view to exploit the NMR potentials for revealing molecular details, would prove to be rewarding. It is intended to make a beginning by trying to look for the applicability of this potential NMR tool for whatever is known in the traditional practices in North East for the utilization of medicinal plant materials.
References:
1. ?A robust Clustering Approach for NMR Spectra of natural product extracts?: Gregory K.Pierens et.al., Magnetic Resonance in Chemistry, Vol. 43: 359-365 (2005)
2. ?Screening by NMR: A new Approach for the Study of Bioactive Natural Products? The Example of Pleurotus ostreatus Hot Water Extract? , Matteo Politi et.al., European Journal of Organic Chemistry, (2005) 1392-1396.
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web counter Installed on April 15th, 2011 with initial reading 'zero' Counter Reading stood at:"000000063" as noted on April 27, 2011 at 10:52 AM: "000000063" The quest about the possibility of utilizing Nuclear Magnetic Resonance Technique for item 1. (listed above) "Standardization of herbal medicines" arose since the exposure at the 72nd Annual Session of the National Academy of Science ,India held in North Eastern hill University,SHILLONG, November 25-27, 2002 during the Workshop on Biodiversity. At this event and in the subsequent events at N.E.H.U., Shillong on Medicinal Chemistry and the Medicinal Plant resources, the importance of traditional medical practices and the necessity to standardize them were vindicated. The problems that arise in standardizing the medicines prescribed by traditional medical practitioners was evident and by that time the metabolic profiling of biological fluids and similar samples by NMR techniques were advancing rapidly and the application to the problems related to the subject matter as above was evident. This resulted in an effort to make available a brief note on the application of NMR techniques was necessary and the above text was drafted, and posted to intenet, as a convenient starting point to initiate this line of research with the NMR facilities at NEHU. An effort to popularise this aspect included the activities at the Biodiversity Cell(Coordinator: Prof.B.Myrbo, Department of Chemistry) and the Centre for Bioinformatics NEHU (Coordinator Prof. P.Tandon, Department of Botany)and it was also necessary to look into the approaches based statistical methods (Principal Component Analysis) for analysing the NMR Spectral Contents for possible correlations. It is heartening to find that at CBMR, Lucknow the metabolic profiling is being developed in such a way that it would be beneficial to adapt the approaches as it was found necessary for Standardizing traditional medicines. Dr.S.Aravamudhan, NEHU Campus, 12th March, 2011
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NMR WORKSHOPS are held for the convenience of USERS to get to know the NMR Techniques: Look for such announcements in the NEHU WEBSITE
"Workshop on NMR in Chemistry and Metabolomics in Biological System" announced for the duration 22nd - 25th February, 2011
could not be held for LACK of PARTICIPANTS http://aravamudhan-s.ucoz.com/technical_education.htmlA presentation file : Introduction for this context |
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The above Video is a youtube feature named NEICSSR_June2011.WMV and the URL is: http://www.youtube.com/user/aram1121944/#p/a/u/0/TlwipuSTlEw Another embedded video URL: http://www.ugc-inno-nehu.com/ToxicHE.html is also a VIDEO UPLOAD feature at youtube.com http://www.youtube.com/watch?v=scKjeqFr0fk Find a pedastrian approach to describe peripheral NMR in Sections III & IV of this article :- http://aravamudhan-s.ucoz.com/nmr_for_oil_and_coal.html A college level introductory description of Nuclear Magnetic Resonance [N.M.R.] can be found in the Playlist : "NMR Videos" at YOUTUBE link: 1_NMR_ElementaryDefinition.WMV Elementary article on NMR Author: S.Aravamudhan More about NMR tools at the link for SAIF, NEHU find in Dr.Aravamudhan's website: http://www.ugc-inno-nehu.com This presentation file is for the National Seminar on: "ENVIRONMENTAL MANAGEMENT AND DEVELOPMENT OF NORTH EAST INDIA" organized by NEICSSR, Shillong while the World Environemnt Day on 5th June 2011 is nearing. The topic for this paper is "An Advanced Spectroscopic Technique Convenient to Adapt |
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Dr. O.P.Sidhu has kindly replied as below, to my email Request for reprints of his publications related to the subject matter of this webpage: ================================================================================ Reprints Thu, April 21, 2011 9:29:12 AM From: OM P SIDHU : opsidhu@rediffmail.com View Contact To: inboxnehu_sa@yahoo.com Attacahments: 4 Files Download All Biresource_Tech.pdf (263KB) ; Phytochemical_Analysis.pdf (857KB) Phytochemistry_71__2010__1085___1094.pdf (857KB) ; PLANTA_online_copy.pdf (643KB) -------------------------------------------------------------------------------- Dear Dr Aravamudhan, This is with reference to your email regarding request of reprints. We are working in the area of plant metabolomics in collaboration with CBMR (SGPGIMS) Lucknow. I am sending you our recently published research papers in plant metabolomics. Thanks Dr O.P. Sidhu Scientist National Botanical Research Institute (CSIR) Rana Pratap Marg Lucknow-226 001, INdia |
| Solid State Characterization of Pharmaceuticals which contains a Chapter on Characterizing Structure and Dynamics in Pharmaceutical Solids by Solid-State NMR Spectroscopy. To order your copies, special discount price for bulk purchase, please write to: Ms. Sarulatha/Ms. Mythili Research Publishing Services H12F Double Tank Colony, K.K. Nagar Chennai - 600 078, Tamil Nadu Phone: +044-24350149; 044-24720542; HP: 9841029371 E-mail: enquiries@researchpubonline.com |
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CLICK HERE to display the source page from "SpectroscopyNow.com" for the material below [May 5, 2006] Solid-state NMR studies of the molecular structure of Taxol Magnetic Resonance in Chemistry 2006, 44, 581-585 Yu Ho, Der-Lii M. Tzou and Feng-I Chu Abstract: Solid-state 13C{1H} cross-polarization/magic angle spinning spectroscopy (CP/MAS) has been utilized to extract the molecular structure information of Taxol, which is an anti-tumor therapeutic medicine extracted from the yew bark. The 13C signals have chemical shift values quite consistent with those measured in solution phase, and the overall chemical shift range is over 200 ppm. Notably, most of the 13C resonances of the taxane ring have two clearly resolved spectral components except the resonance peaks of C-15, C-16 and C-17, which are located at the central part of the taxane ring. On the basis of our NMR data, we propose that these doublets originate from two slightly different molecular conformations of the taxane ring and still the central part of the ring remains structurally similar. Furthermore, it is demonstrated that the 13C chemical shift difference deduced from the doublet splittings can serve as a direct measure of the structural difference between the two conformations, which could possibly correlate with the anti-tumor activity of Taxol. |
| CLICK HERE to display the source webpage from "SpectroscopyNow.com" for the material below |
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Huᮧq���s a plant root used in one of the most common tonics of Chinese herbal medicine with purported activity in cancer, diabetes, inflammation, and nephritis. As such, there is a lot of interest in the active ingredients of this species as it might lead to novel pharmaceuticals against a range of illnesses. Now, researchers in China have used proton NMR to identify active components, and report their results in the journal Magnetic Resonance in Chemistry. Xingang Du, Yanjing Bai, Hong Liang, Zhiying Wang, Yuying Zhao, and Qingying Zhang of the School of Pharmaceutical Sciences, at Peking University Health Science Center, in Beijing and Luqi Huang of the Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, also in Beijing, have focused on the chemistry of extracts of Astragalus membranaceus var. mongholicus. The dry roots of this leguminous plant, more usually known as Radix Astragali, or huᮧq���yellow leader) in traditional Chinese medicine (TCM) is one of the most important tonics used to reinforce "Qi" (the principle of vital energy in TCM). Practitioners claim that this strengthens superficial resistance to disease, promotes the discharge of pus and the growth of new tissue. In clinical tests it has demonstrated physiological activity in liver protection, as an antioxidant, an antiviral compound, and in lowering blood pressure and stimulating the immune system. The researchers used one- and two-dimensional NMR, including 1H, 13C, COSY, HSQC, HMBC, and NOESY sequencesto establish structures of extracts of huᮧq���They isolated four 3'-hydroxy-4'-methoxy-isoflavonoids from the dried roots. Namely, calycosin-7-O-beta-D-glucopyranoside, calycosin, pratensein-7-O-beta-D-glucopyranoside, and pratensein. This latter compound was previously unknown and represents a potential new lead for the development of novel pharmaceuticals from this traditional remedy. Interestingly, the team found that during structural elucidation of the compounds, solvent obscured the proton signal patterns somewhat producing mis-assignments. The team therefore used a range of deuterated solvents to side-step this issue and were able to correctly assign the novel compound with confidence as well as correct the previously reported literature structures for the others.
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