Готові списки джерел за темами / Quantitative determination for the biological activity using NMR

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Добірка наукової літератури з теми "Quantitative determination for the biological activity using NMR"

Автор: Grafiati

Опубліковано: 3 червня 2025

Оновлено: 31 липня 2025

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Статті в журналах з теми "Quantitative determination for the biological activity using NMR"

Premchand, Patil Deepak V. Nagarale and Bhata R. Chaudhari*. "RECENT ADVANCES AND APPLICATIONS OF TELMISARTAN." Indo American Journal of Pharmaceutical Sciences 04, no. 10 (2017): 3935–45. https://doi.org/10.5281/zenodo.1035249.

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Telmisartan is pharmacologically active molecule, Here we reviewed some synthetic methods and their application like angiotensin II receptor, quantitative determination for the biological activity using NMR, restrict NFAT nuclear translocation and etc..

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Larive, Cynthia K., Dimuthu Jayawickrama, and Laszlo Orfi. "Quantitative Analysis of Peptides with NMR Spectroscopy." Applied Spectroscopy 51, no. 10 (1997): 1531–36. http://dx.doi.org/10.1366/0003702971939055.

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The determination of peptide concentration with 1H nuclear magnetic resonance (NMR) spectroscopy using an internal standard or an external standard in a sealed glass capillary was investigated for three tyrosine-containing tripeptides. Trimethylsilylpropionic acid (TSP) and maleic acid were tested as external standards for quantitation by proton NMR. Although comparable results were obtained for either standard, the performance of maleic acid was found to be superior because of its better long-term stability in the sealed capillary. Loss of TSP from solution occurred over time due to adsorptio

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RAKS, V. A. "INOSITOLS: BIOLOGICAL ROLE AND APPLICATION, METHODS OF EXTRACTION FROM PLANT RAW MATERIALS AND DETERMINATION, BIOTECHNOLOGICAL SYNTHESIS." Biotechnologia Acta 17, no. 3 (2024): 29–46. http://dx.doi.org/10.15407/biotech17.03.029.

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The aim of the work was to review modern extraction, detection and quantification analytical methods of inositols and their derivatives. Methods. Inositols are extracted from vegetable raw materials by methods of liquid extraction, under pressure, microwave extraction and supercritical fluid extraction. Quantitatively analyzed by methods of gas and liquid chromatography with preliminary derivatization. The structure of inositols can be determined by the NMR spectroscopy. Results. Inositols and their derivatives are biologically active compounds, wich are involved in the egulation of the intrac

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Rogov, A. V., and G. V. Mokrov. "Determination of the composition of pharmaceutical substances used in drugs with antiarrhythmic activity." Pharmacokinetics and Pharmacodynamics, no. 4 (January 22, 2024): 95–109. http://dx.doi.org/10.37489/2587-7836-2023-4-95-109.

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Cardiac arrhythmias are the most common pathologies of the cardiovascular system. Allapinin® and Allaforte® from “Pharmcenter VILAR” are effective IC-class antiarrhythmic agents. The main component of these drugs is a pharmaceutical substance with INN: lappaconitine hydrobromide, which in addition to lappaconitine hydrobromide itself, contains impurities of other diterpene alkaloids. This work is devoted to a detailed analysis of the alkaloid composition of a new pharmaceutical substance isolated from roots and rhizomes, as well as from the aerial part of plants of the genus Aconite (monkshood

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Satpathi, Sagar, Tamaki Endoh, Peter Podbevšek, Janez Plavec, and Naoki Sugimoto. "Transcriptome screening followed by integrated physicochemical and structural analyses for investigating RNA-mediated berberine activity." Nucleic Acids Research 49, no. 15 (2021): 8449–61. http://dx.doi.org/10.1093/nar/gkab189.

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Abstract Non-coding RNAs are regarded as promising targets for the discovery of innovative drugs due to their abundance in the genome and their involvement in many biological processes. Phytochemicals (PCs) are the primary source of ligand-based drugs due to their broad spectrum of biological activities. Since many PCs are heterocyclic and have chemical groups potentially involved in the interaction with nucleic acids, detailed interaction analysis between PCs and RNA is crucial to explore the effect of PCs on RNA functions. In this study, an integrated approach for investigating interactions

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Roman, Roxana, Lucia Pintilie, Miron Teodor Căproiu, et al. "New N-acyl Thiourea Derivatives: Synthesis, Standardized Quantification Method and In Vitro Evaluation of Potential Biological Activities." Antibiotics 12, no. 5 (2023): 807. http://dx.doi.org/10.3390/antibiotics12050807.

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New N-acyl thiourea derivatives with heterocyclic rings have been synthesized by first obtaining isothiocyanate, which further reacted with a heterocyclic amine, characterized by (FT-IR, NMR spectroscopy and FT-ICR) and tested for their in vitro antimicrobial, anti-biofilm and antioxidant activities to obtain a drug candidate in a lead-optimization process. From the tested compounds, those bearing benzothiazole (1b) and 6-methylpyridine (1d) moieties revealed anti-biofilm activity against E. coli ATCC 25922 at MBIC values of 625 µg/mL. Compound 1d exhibited the highest antioxidant capacity (~4

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Ryazanova, Tatyana K., Vladimir A. Kurkin, Anna A. Shmygareva, Svetlana N. Glushchenko, and Albert I. Agapov. "The current issues of standardization of <i>Aloe arborescens</i> Mill. leaves." Aspirantskiy Vestnik Povolzhiya 21, no. 5-6 (2021): 78–86. http://dx.doi.org/10.55531/2072-2354.2021.21.3.78-86.

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BACKGROUND: Aloe arborescens Mill. leaves contain a whole complex of biologically active compounds (derivatives of anthraquinone, anthrone, pyrone, biopolymers, etc.) and are widely used in medical practice as raw materials for the production of anti-inflammatory, wound healing agents. The presence of anthracene derivatives in the leaves determines the laxative activity of raw plant materials and preparations. It emphasizes the importance of Aloe arborescens preparations for internal use in inflammatory diseases accompanied by constipation and decrease in secretory activity. Another biological

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Sobolev, R. V., I. E. Sokolov, N. A. Petrov, V. А. Sarkisyan, and A. A. Kochetkova. "Methods of extraction, separation and identification of cyclic peptides from flaxseed (Linum usitatissimum L.): A review." Food systems 7, no. 4 (2025): 535–42. https://doi.org/10.21323/2618-9771-2024-7-4-535-542.

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Oilseed flax (Linum usitatissimum L.) is a valuable crop characterized by a high content of fats, dietary fiber, protein and various biologically active substances, in particular cyclopeptides. Cyclic peptides are a group of cyclic hydrophobic peptides consisting of eight to ten amino acids with a molecular weight in the range of 950–2300 Da. Flax oil and seeds contain from 0.1 to 0.3% cyclopeptides, which can exhibit antioxidant, anti-inflammatory, immunosuppressive, antihypertensive and antitumor activity. The aim of this review was to systematize and summarize the available literature data

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Kotova, Elizaveta O., Alexandra Yu Moiseeva, Zhanna D. Kobalava та ін. "Proinflammatory cytokines IL-6, IL-1β, TNF-α in infective endocarditis". Terapevticheskii arkhiv 96, № 4 (2024): 342–48. http://dx.doi.org/10.26442/00403660.2024.04.202711.

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Aim. To study the features of macrophages in the tissues of resected valves in operated patients with infective endocarditis (IE), their significance and interaction with inflammatory markers to improve the effectiveness of IE diagnosis. Materials and methods. Prospectively the research included 25 adult patients with active IE (Duke criteria 2015) and 24 patients with heart defects without IE, hospitalized in a cardiosurgical hospital in Moscow (2021–2022). A standard laboratory and instrumental examination was carried out for the diagnosis of IE, including etiological diagnosis with microbio

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Dijs, Ivo J., Eric van der Windt, Lauri Kaihola, and Klaas van der Borg. "Quantitative Determination by 14C Analysis of the Biological Component in Fuels." Radiocarbon 48, no. 3 (2006): 315–23. http://dx.doi.org/10.1017/s0033822200038777.

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Radiocarbon analysis was performed by liquid scintillation counting (LSC) and accelerator mass spectrometry (AMS) to assess whether the content of biological components in hydrocarbon fuels could be derived. Different fuel mixtures were prepared containing bioethanol, fossil ethanol, and fossil gasoline. The specific 14C activity of these mixtures was obtained from LSC measurements and directly related to the concentration of carbon originating from the bioethanol (biocarbon). The results were checked via standardized carbon dating procedures and AMS. A good linear correlation exists between t

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Більше джерел

Частини книг з теми "Quantitative determination for the biological activity using NMR"

Wemmer, D. "Design and Characterization of New Sequence Specific DNA Ligands." In Biological NMR Spectroscopy. Oxford University Press, 1997. http://dx.doi.org/10.1093/oso/9780195094688.003.0026.

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During the early 1980s there were two developments which lead to our studies of sequence specific DNA ligands. The first was the development of sequential assignment methods based on 2D NMR spectra which allowed complete assignment of resonances for proteins (Wüthrich, 1986). The assignments in turn allowed determination of many structural restraints through interpretation of NOESY crosspeaks and coupling constants from COSY type spectra. The second advance was the improvement of the chemistry for direct synthesis of DNA oligomers. With multimilligram samples of DNA oligomers available sequent

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Thakur, Rajneesh, Nikhil Mehta, Ajeet Singh, Kanchan Joshi, Ankita Gautam, and Navneet Bithel. "Techniques for the Isolation of Plant-Based Bioactive Compounds." In Advances in Bioinformatics and Biomedical Engineering. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-6684-7337-5.ch011.

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Phytochemicals are natural active ingredients that are occurring in plants. In the pursuit for novel biomolecules, the recovery of bioactive composites from plants, as well as their quantitative and qualitative evaluation, is critical. In the discovery and characterization of bioactive compounds, plant extraction and separation remain a critical concern. Analysis of bioactive compounds found in plant extracts using various approaches involving the use of chromatographic methods such as HPLC, TLC, OPLC, GC, PC, CC, and detection through FTIR, NMR, and MS is a frequent practice in the isolation

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Georgiou, George, and Barrett R. Harvey. "Applications of Flow Cytometry in Protein Engineering." In Flow Cytometry for Biotechnology. Oxford University Press, 2005. http://dx.doi.org/10.1093/oso/9780195183146.003.0017.

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In recent years, the application of evolutionary methods for protein engineering has created tremendous optimism regarding our ability to generate proteins with tailored functional properties such as ligand binding, improved stability, allostery, and catalytic activity. The power of directed protein evolution lies in its simplicity : First, a gene encoding a polypeptide is subjected to mutagenesis, and the resulting ensemble of mutated genes is expressed in a suitable cellular host. Second, the population of expressed proteins is subjected to a screening process. Often, multiple rounds of scre

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Тези доповідей конференцій з теми "Quantitative determination for the biological activity using NMR"

Grinco, Marina, Alexandru Marina, Natalia Birca, et al. "Pomolic acid from apple pomace: quantitative determination by heteronuclear two-dimentional QNMR and preparative isolation." In Scientific seminar with international participation "New frontiers in natural product chemistry". Institute of Chemistry, Republic of Moldova, 2023. http://dx.doi.org/10.19261/nfnpc.2023.ab14.

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Pomolic acid (PA) is a pentacyclic triterpenic acid isolated from apples by Brieskorn and Wunderer in 1967 [1]. Its highly relevant biological activity profile came recently into focus and there have been many reports on the content of PA in different plant sources [2]. Quite surprisingly, the general perception of low PA content in plants persists and this information hinders its broader investigation as a compound of pharmaceutical and nutraceutical potential. The main aim of the current work was quantitative determination of pomolic acid in apple pomace by two-dimensional heteronuclear NMR

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Brito, Jordana T., Lucas H. Martorano, Ana Carolina F. de Albuquerque, et al. "ESPECTROSCOPIA COMPUTACIONAL APLICADA AO REASSINALAMENTO ESTRUTURAL DE MOLÉCULAS QUIRAIS: HELIANNUOL L." In VIII Simpósio de Estrutura Eletrônica e Dinâmica Molecular. Universidade de Brasília, 2020. http://dx.doi.org/10.21826/viiiseedmol202025.

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In the past, structure determination of natural products was an arduous process depending almost entirely on chemical synthesis, mainly by derivatization and degradation processes, taking years of effort. Recently, structural elucidation of natural products has undergone a revolution. Nowadays, with the combined use of different advanced spectroscopic methods, it became possible to completely assign the structure of natural products using small amounts of sample. However, despite the extraordinary ongoing advances in spectroscopy, the mischaracterization of natural products has been and remain

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Organ, Adina, Mariana Jian, Vitalie Cobzac, et al. "Analytical studies on the fractionation products from lavender extracts." In Scientific seminar with international participation "New frontiers in natural product chemistry". Institute of Chemistry, Republic of Moldova, 2023. http://dx.doi.org/10.19261/nfnpc.2023.ab28.

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Lavender (Lavandula angustifolia) is a widespread aromatic plant exploited globally for essential oil production. It is known that the remaining wastes after industrial processing are rich in secondary metabolites with relevant biological activities [1]. In particular, triterpenic acids have recently attracted the interest of scientific community because of their broad activity spectrum which makes them very attractive for the use in cosmetics and healthcare products as functional compounds. The aim of this study was isolation and analytical studies on different fractions obtained from Lavandu

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