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  • 1
    In: JPC - Journal of Planar Chromatography - Modern TLC, Akademiai Kiado Zrt., Vol. 29, No. 5 ( 2016-10), p. 380-387
    Type of Medium: Online Resource
    ISSN: 0933-4173 , 1789-0993
    Language: English
    Publisher: Akademiai Kiado Zrt.
    Publication Date: 2016
    detail.hit.zdb_id: 2304198-5
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  • 2
    In: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, Elsevier BV, Vol. 124 ( 2014-04), p. 292-299
    Type of Medium: Online Resource
    ISSN: 1386-1425
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2014
    detail.hit.zdb_id: 2016492-0
    SSG: 11
    SSG: 21
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  • 3
    Online Resource
    Online Resource
    Bentham Science Publishers Ltd. ; 2020
    In:  Current Pharmaceutical Analysis Vol. 16, No. 6 ( 2020-07-01), p. 743-751
    In: Current Pharmaceutical Analysis, Bentham Science Publishers Ltd., Vol. 16, No. 6 ( 2020-07-01), p. 743-751
    Abstract: Vitex negundo (Nagod) is a very useful medicinal plant growing throughout India. The leaves of Nagod are aromatic, tonic and vermifuge. They are useful in the treatment of many ailments. Introduction: Both seasonal and geographical variations have been observed in the active constituents in Vitex negundo. A comprehensive and reproducible HPLC method based on HPLC fingerprint analysis was developed for assessing the quality of Vitex negundo. Methods: Sixteen samples of Nagod collected from different locations and seasons of India were analysed by HPLC and chromatograms were recorded for each of them using PDA detector and 10 peaks were considered for further data analysis. The data were then treated for PCA and cluster analysis using Minitab software. Results: PCA and HCA analysis were used in determining the variability in the leaves of Nagod collected from different places and seasons. Conclusion: The method was useful for discriminating the location of plant within or outside Gujarat but was unable to display any effective seasonal variation in collected samples.
    Type of Medium: Online Resource
    ISSN: 1573-4129
    Language: English
    Publisher: Bentham Science Publishers Ltd.
    Publication Date: 2020
    SSG: 15,3
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  • 4
    Online Resource
    Online Resource
    Bentham Science Publishers Ltd. ; 2022
    In:  Current Psychopharmacology Vol. 11, No. 1 ( 2022-04), p. 30-42
    In: Current Psychopharmacology, Bentham Science Publishers Ltd., Vol. 11, No. 1 ( 2022-04), p. 30-42
    Abstract: Ageing comes with degeneration in many biological activities like impairment of cognition, intelligence, attention, and memory. The decline in all those mental capabilities would be due to the abnormal changes in neuronal architecture with increasing age, chronic oxidative stress and inflammatory state of the tissue, nutritional deficiency. Nootropics or smart drugs enhance memory, attention, creativity, and cognitive performance by affecting the synthesis and receptor binding of neurotransmitters in the brain, especially dopamine, serotonin, gamma-aminobutyric acid, glutamate, and acetylcholine. Nootropics have shown their positive effects in parkinson's, autism, alzheimer's, huntington's disorders, where impaired memory is the primary concern. Synthetic class of nootropics has limitations and reported exacerbation of other brain disorders (off label effects) or therapeutic failure in some instances. Nutraceuticals are dietary derived vitamins, minerals, herbal products, proteins, marine products, and probiotics. The health benefits derived from Nutraceuticals are increasing brain blood flow, reducing inflammation in nervous tissues, detoxifying toxins from the brain, balancing neurotransmitter turnover rate, correcting neuronal and receptor damages and facilitating synaptic transmission, good antioxidant properties and power of improving neuroplasticity of the brain that combat neurodegeneration. The demands for effective nootropics will remain high as the number of cases are increased tremendously.
    Type of Medium: Online Resource
    ISSN: 2211-5560
    Language: English
    Publisher: Bentham Science Publishers Ltd.
    Publication Date: 2022
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  • 5
    In: Luminescence, Wiley, Vol. 38, No. 6 ( 2023-06), p. 753-761
    Abstract: Doxepin hydrochloride (DOX) is a tricyclic antidepressant drug. Three sensitive spectrofluorimetric methods, namely resonance Rayleigh scattering (RRS), frequency doubling scattering (FDS) and second‐order scattering (SOS), were developed and validated for their estimation of doxepin in spiked human plasma and formulation using liquid–liquid extraction method through the formation of an ion pair complex with eosin Y at a pH of 4.5. Various factors affecting fluorescence intensity were optimized, and the reaction kinetics was determined using the Arrhenius equation method. Different scattering methods such as RRS, FDS and SOS were developed at maximum scattering wavelengths λ ex / λ em  = 567/567 nm for RRS, 720/360 nm for SOS and 260/520 nm for FDS, respectively. The methods exhibited high sensitivities, and the detection limits for DOX were found to be 0.82, 1.20 and 1.03 ng/ml for RRS, FDS and SOS methods, respectively. The FDS method exhibited the highest sensitivity. The methods were validated using the International Council for Harmonisation of Technical Requirements for Pharmaceuticals for Human Use guidelines and applied to determine DOX in capsule and spiked human plasma samples.
    Type of Medium: Online Resource
    ISSN: 1522-7235 , 1522-7243
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2023
    detail.hit.zdb_id: 2001819-8
    SSG: 12
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  • 6
    Online Resource
    Online Resource
    Bentham Science Publishers Ltd. ; 2023
    In:  Current Drug Discovery Technologies Vol. 20, No. 6 ( 2023-11)
    In: Current Drug Discovery Technologies, Bentham Science Publishers Ltd., Vol. 20, No. 6 ( 2023-11)
    Abstract: Indole is known as a versatile heterocyclic building block for its multiple pharmacological activities and has a high probability of success in the race for drug candidates. Many natural products, alkaloids, and bioactive heterocycles contain indole as the active principle pharmacophore. These encourage the researchers to explore it as a lead in the drug development process. The current manuscript will serve as a torchbearer for understanding the structurally diverse class of indole derivatives with extensive pharmacological activity. The current manuscript describes the intermediates and their functional groups responsible for superior biological activity compared to the standard. The review is written to help researchers to choose leads against their target but also to provide crucial insight into the design of a hybrid pharmacophore-based approach in drug design with enhanced potential. The present reviews on the indole derivatives correlate the structures with biological activities as well as essential pharmacophores, which were highlighted. The discussion was explored under challenging targets like dengue, chikungunya (anti-viral), antihypertensive, diuretic, immunomodulator, CNS stimulant, antihyperlipidemic, antiarrhythmic, anti-Alzheimer’s, and neuroprotective, along with anticancer, antitubercular, antimicrobial, anti-HIV, antimalarial, anti-inflammatory, antileishmanial, anti-anthelmintic, and enzyme inhibitors. So, this review includes a discussion of 19 different pharmacological targets for indole derivatives that could be utilized to derive extensive information needed for ligand-based drug design. The article will guide the researchers in the selection, design of lead and pharmacophore, and ligand-based drug design using indole moiety.
    Type of Medium: Online Resource
    ISSN: 1570-1638
    Language: English
    Publisher: Bentham Science Publishers Ltd.
    Publication Date: 2023
    SSG: 15,3
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  • 7
    Online Resource
    Online Resource
    Oxford University Press (OUP) ; 2023
    In:  Journal of AOAC International ( 2023-09-07)
    In: Journal of AOAC International, Oxford University Press (OUP), ( 2023-09-07)
    Abstract: Tigecycline (TIG) is a third-generation glycylcycline derivative used as an antimicrobial and anticancer agent for the past few years. Its intricate structure makes it more vulnerable toward degradation under the influence of various environmental factors and leads to the generation of impurities. Due to its stability issues, TIG is available as a lyophilized powder for injection. The analysis of TIG becomes a cumbersome task for analysts due to its instability in solution form. As TIG works as a life-saving drug, it is important to review its analytical methods for its quality control. Objective The present review discusses various analytical methodologies for determining TIG from its bulk, lyophilized powder, pharmacopoeial methods and factors responsible for its instability. Methods The present review represents the analysis of data reported in the literature from 1999-2022 for the analysis of TIG. Results Numerous alternative analytical techniques such as UV-visible spectrophotometry, spectrofluorimetric methods, RP-HPLC (reversed-phase high-performance liquid chromatography) and FT-IR (Fourier transform infrared), and electrophoresis has been reported for quantification, identification, and characterization of TIG. Conclusions Several analytical techniques are available to be used as a quality control tool for tigecycline, including HPLC without derivatization, whereas the fluorescence technique requires derivatization using acidic dye. A few methods require tedious pre-sample preparation techniques, become time-consuming, and involve using one or more organic solvents; there is a need to develop eco-friendlier methods for analyzing tigecycline. Highlights Various analytical methods such as spectrometric, fluorimetric and chromatographic methods have been discussed for estimation of TIG from its bulk and different dosage form.
    Type of Medium: Online Resource
    ISSN: 1060-3271 , 1944-7922
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2023
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  • 8
    In: Journal of AOAC INTERNATIONAL, Oxford University Press (OUP), Vol. 102, No. 4 ( 2019-07-01), p. 1014-1020
    Abstract: Background: Ayurvedic medicines help in healing disease with fewer undesirable effects in comparison with an allopathic system of medicine to treat central nervous system (CNS) disorders, as the latter is more expensive. Centella asiatica L. is often used in Ayurvedic formulations for the treatment of CNS disorders. Objective: A stability test using an HPTLC method for the estimation of an important marker asiaticoside (ASI) from C. asiatica powder and marketed formulation was developed. Methods: The marker compound ASI from plant powders and marketed formulations were resolved using toluene–ethyl acetate–methanol–glacial acetic acid (2+7+3+1, v/v/v/v) as the mobile phase and then was derivatized. The plant powder and marketed formulation were also subjected to stability studies. Results: The Rf value of ASI was found in range of 0.43–0.47 for the standard ASI, plant powder, and marketed formulation. It was found that the plant powder and formulation exhibited first-order degradation kinetics. Conclusions: The contents of ASI in the formulation (Churna) and its flow characters reduced at the end of the 6 months during an accelerated stability study. The developed method can be used to quantify ASI in the presence of its degradation products. Highlights: The developed method helps in determining batch to batch variation in the content of ASI in herbal formulations.
    Type of Medium: Online Resource
    ISSN: 1060-3271 , 1944-7922
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2019
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  • 9
    Online Resource
    Online Resource
    A and V Publications ; 2018
    In:  Asian Journal of Nursing Education and Research Vol. 8, No. 2 ( 2018), p. 230-
    In: Asian Journal of Nursing Education and Research, A and V Publications, Vol. 8, No. 2 ( 2018), p. 230-
    Type of Medium: Online Resource
    ISSN: 2231-1149 , 2349-2996
    Language: English
    Publisher: A and V Publications
    Publication Date: 2018
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  • 10
    In: Journal of AOAC International, Oxford University Press (OUP), Vol. 106, No. 4 ( 2023-07-17), p. 979-991
    Abstract: Jatyadi taila (JT) is a well-known Ayurvedic wound-healing product, comprising 16 different medicinally important plants, including Curcuma longa, Terminalia chebula, and Jasminum officinale. Objective The proposed work discusses the development and validation of the green and economical stability-indicating HPTLC method for quantification of the key marker phytoconstituents, curcumin (CUR), gallic acid (GA), and ursolic acid (UA), from JT. Method Quality standard parameters for JT were determined following standard procedures. The marker constituents CUR, GA, and UA were resolved from JT using toluene–ethyl acetate–formic acid (6:2:1, v/v/v) as the mobile phase and subsequently derivatized to estimate UA. The developed plates were subjected to HPTLC-MS analysis. All constituents were subjected to forced degradation to determine the proposed technique’s stability-indicating property and the accelerated stability studies of marketed formulation and marker constituents. Greenness evaluation of the method was aided by the AGREE methodology. Results The Rf values of CUR, GA, and UA were found to be 0.60 and 0.60; 0.27 and 0.28; and 0.74 and 0.77 from reference standard and oil samples respectively, when analyzed at 366 nm, 290 nm, and 366 nm, respectively. HPTLC-MS was carried out to verify the active constituents present in JT. The constituents followed first-order degradation kinetics. The quantity of CUR, GA, and UA in JT was reduced at the end of accelerated stability studies. The developed approach was validated in compliance with the International Conference on Harmonization (ICH) Q2 (R2) guideline. Conclusions Among the chosen key markers, GA was highly unstable during forced degradation. JT should be stored at a controlled temperature using more protective packaging material to ensure its quality and efficacy. Highlights The developed method can be used as a quality control tool for JT as it can be used to determine the stability of the key marker compounds the herbal formulation.
    Type of Medium: Online Resource
    ISSN: 1060-3271 , 1944-7922
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2023
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