Control of the synthesis of some biologically active substances by thin-layer chromatography

1982 ◽  
Vol 16 (1) ◽  
pp. 294-296 ◽  
Author(s):  
B. Banjanin ◽  
J. Budimir ◽  
N. Djonlagic ◽  
A. Hadzisće ◽  
M. Mazalović ◽  
...  
Keyword(s):  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Biologically Active Substances ◽  
Biologically Active ◽  
Layer Chromatography ◽  
Active Substances

scholarly journals Application of the thin-layer chromatography method for analysis of plant antioxidant activity

Food systems ◽  
2021 ◽  
Vol 4 (1) ◽  
pp. 26-30
Author(s):  
N. V. Kupaeva ◽  
E. R. Vasilevskaya ◽  
L. V. Fedulova ◽  
E. A. Kotenkova
Keyword(s):  
Antioxidant Activity ◽  
Thin Layer ◽  
Thin Layer Chromatography ◽  
High Performance ◽  
Biologically Active ◽  
Chromatography Method ◽  
Physicochemical Methods ◽  
Ethanol Extracts ◽  
Layer Chromatography ◽  
Active Substances

Plants are a rich source of effective non-toxic biologically active substances. Various physicochemical methods of analysis are used for evaluation of plant antioxidant activity. Composition of ethanol extracts of red, yellow and white onion husks, dried rosemary, basil, and chaga were studied by high performance thin layer chromatography (HPTLC) method. The antioxidant activity of the obtained fractions on a chromatographic plate was assessed by subsequent DPPH screening. The extracts red and yellow onion husk and rosemary demonstrated the highest antioxidant activity, variability of the qualitative composition and similarity of antioxidant profiles, while extract of white onion husks did not contain any antioxidant classes. Intensive spots with Rf of 0.13-0.97 were observed along the whole chromatogram track corresponding to red onion husks. It was also found that all tested extract, excepting white onion husk and chaga, contained spots with varying degrees of intensity in the Rf range of 0.96-0.98, which corresponded quercetin Rf value.

scholarly journals Assessment of the quality of peppermint leaves by thin-layer chromatography in some objects of plant origin

2020 ◽  
Vol 19 (5-6) ◽  
pp. 148-154
Author(s):  
Vali A. Sahratov ◽  
Tamara L. Malkova ◽  
Ludmila N. Karpova ◽  
Anna A. Pospelova
Keyword(s):  
Medicinal Plant ◽  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Biologically Active ◽  
Mentha Piperita ◽  
Plant Origin ◽  
Plant Materials ◽  
Layer Chromatography ◽  
Active Substances

The State Pharmacopoeia of the XIV edition defines the approach for the assessment of the quality of medicinal plant materials, it deals with the identification of the main groups of biologically active substances by thin layer chromatography. According to this approach, the analysis of some types of medicinal plant materials as a part of some objects of plant origin was carried out. The article presents the quality assessment algorithm as examplified by peppermint leaves (Mentha piperita L.), which are part of a variety of plant object.

Phytochemical, Analytical and Medicinal Studies of Holoptelea integrifolia Roxb. Planch - A Review

2019 ◽  
Vol 5 (4) ◽  
pp. 270-277 ◽  
Author(s):  
Vijay Kumar ◽  
Simranjeet Singh ◽  
Ragini Bhadouria ◽  
Ravindra Singh ◽  
Om Prakash
Keyword(s):  
Liquid Chromatography ◽  
Thin Layer ◽  
Thin Layer Chromatography ◽  
High Performance ◽  
Biologically Active ◽  
Toxicological Studies ◽  
Wide Range ◽  
Layer Chromatography

Holoptelea integrifolia Roxb. Planch (HI) has been used to treat various ailments including obesity, osteoarthritis, arthritis, inflammation, anemia, diabetes etc. To review the major phytochemicals and medicinal properties of HI, exhaustive bibliographic research was designed by means of various scientific search engines and databases. Only 12 phytochemicals have been reported including biologically active compounds like betulin, betulinic acid, epifriedlin, octacosanol, Friedlin, Holoptelin-A and Holoptelin-B. Analytical methods including the Thin Layer Chromatography (TLC), High-Performance Thin Layer Chromatography (HPTLC), High-Performance Liquid Chromatography (HPLC) and Liquid Chromatography With Mass Spectral (LC-MS) analysis have been used to analyze the HI. From medicinal potency point of view, these phytochemicals have a wide range of pharmacological activities such as antioxidant, antibacterial, anti-inflammatory, and anti-tumor. In the current review, it has been noticed that the mechanism of action of HI with biomolecules has not been fully explored. Pharmacology and toxicological studies are very few. This seems a huge literature gap to be fulfilled through the detailed in-vivo and in-vitro studies.

scholarly journals ANTIBACTERIAL ACTIVITY AND THIN LAYER CHROMATOGRAPHY PROFILE Muntingia Calabura LEAF EXTRACT AS A MATERIAL CANDIDATE HAND SANITIZER

2018 ◽  
Vol 11 (1) ◽  
pp. 43
Author(s):  
Santy Pristianingrum ◽  
Baiq Lely Zainiati ◽  
Iwan Doddy Dharmawibawa
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Preventive Action ◽  
Hand Sanitizer ◽  
Layer Chromatography ◽  
Active Substances ◽  
Muntingia Calabura

Abstract : the utilization of antibacterial active substances from several plants is increasingly not only as the ingredients of medicine, but its utilization is also utilized for an antibacterial ingredient for preventive action, one of them is hand sanitizer material. This research focused to find the antibacterial active substances alternative from Muntingia calabura leaves extract. The data were analyzed descriptively including the inhibitory of ethanol absolute extract and ethanol 95% of M. Calabura against isolate clinical bacteria by Kirby Bauer method and the type of coumpund that contains in M.calabura leaf by thin layer chromatography utilizingeluen n-hexan- Methanol. Etanol absolute extract M.calabura leaf showing the average inhibition zone against Pseudomonas aeruginosa 15.67 mm, Staphylococcus aureus 19.33 mm and Escherichia coli 13 mm. While, The etanol extract 95% showing higher inhibition Pseudomonas aeruginosa 19.67 mm, Staphylococcus aureus 19.33 mm and Escherichia coli 16.67 mm. This inhibitory zone was slightly lower than chlorhexidine gluconate with an average of 20-24 mm against the three bacteria that utilized in the test but belongs to the strongly sensitive category for natural materials according to Mukherjee (1988). From thin layer chromatography profile with eluen n-hexan: methanol found three compounds that were in the range of Rf value 0.4; 0.5 and 0.7. The Conclusion for this study is the bioactive material from etanol 95% extract M.calabura leaf can be optimized to the hand sanitizer active compound candidate.

scholarly journals Algorithm for assessing the completeness of seed treatment of wheat and barley

2019 ◽  
pp. 212-224
Author(s):  
L. Chervyakova ◽  
T. Panchenko ◽  
O. Tsurkan ◽  
N. Adamenko
Keyword(s):  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Control Method ◽  
Bromphenol Blue ◽  
Chromatography Method ◽  
Agno3 Solution ◽  
Stage Characteristic ◽  
Layer Chromatography ◽  
Active Substances

Goal. To develop a method for the determination of imidacloprid, clothianidin, prothioconazole and tebuconazole in the treatment seeds of wheat and barley. Methods. Active substances were determined by thin layer chromatography (TLC). Mathematical-statistical method for evaluate the linear range of the dependence of the area of the chromatographic zone on the amount of active substance was used. Results. The determination of pesticides includes a number of basic stage: characteristic the matrix by the ratio of the content of coextracting substances, that interfere with the determination, and the content of pesticides; classification of pesticides by polarity in according to the dipole moment (µ, D); extraction from the analyzed sample by organic solvent with corresponding of the dielectric constant, ε; purification; qualitative and quantitative determination. In the case of the analysis of treatment seeds, in which the amount of pesticides is much greater than coextracting compounds, the stages of classification and purification are excluded from the analysis. The extraction is carried out with ethanol. Qualitative determination of pesticides is carried out on plates with a thin layer of adsorbent (silicagel) in the mobile phase (mixture of hexane and ethanol, ε = 7.49) with using corresponding reagents. Silver ammonia (AgNO3) solution and followed by UV irradiation of the chromatogram is used for identification halogen-containing pesticides (zones of localization of compounds are formed dark spots of reduced silver). Pesticides containing donor atoms of sulfur, nitrogen, oxygen, identify by bromphenol blue (BPB) and subsequent bleaching of the background with an solution of citric acid (zones of localization of compounds are formed blue spots form on a light background). The active substances are identified with the corresponding Rf of the zones localization. Quantitatively of active substances is determined by the calibration dependence of the area of compound’ chromatographic zone on its quantity. For all four compounds, this dependence is linear in the concentration range of 0.20 — 0.80 µg and is described by the regression equation for: imidacloprid y = 6.25x + 5.45; for clothianidine y = 11.65x + 6.70; for prothioconazole y = 28.7x + 2.05; for tebuconazole y = 13.00x + 7.00. In all cases, the correlation between the indicators is estimated as strong (r = 0.99). Conclusions The algorithm for assessing the completeness of the treatment of wheat and barley seeds is an express control method and using the thin layer chromatography method allows to determine four active substances in one sample during one analysis with high accuracy (relative error of less than 5% at n = 5, P = 0.95) excluding laborious experiment.

scholarly journals STUDYING OF THE LIPOPHILICITY AND TOXICITY OF DIPHENYLACETAMIDE DERIVATIVES

2018 ◽  
Vol 9 (1) ◽  
Author(s):  
Suzana Apostolov ◽  
Đenđi Vaštag ◽  
Borko Matijević ◽  
Gorana Mrđan
Keyword(s):  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Reversed Phase ◽  
Biologically Active ◽  
Log P ◽  
Organic Modifiers ◽  
Modern Approach ◽  
Software Packages ◽  
Test Organisms ◽  
Layer Chromatography

Modern approach in the study of biologically active compounds includes the establishment of relationships between molecular structure, physicochemical properties and the behavior which studied compound can manifest in the biological medium. These examinantions are performed in the early stages of the design of future bioactive agent and require the knowledge of molecular descriptors that can point to its biological activity, including lipophilicity which occupies a key position. For the series of diphenylacetamide derivatives, lipophilicity is determined experimentally by thin-layer chromatography on reversed phase (RP TLC18 F254s), in mixtures of water and various organic modifiers and computationally, by using the relevant software packages. In order to estimate the potential acute toxicity of the tested diphenylacetamide derivatives, their effective concentrations, EC50, on the selected test organisms have been determined. Experimentally determined lipophilicity (RM 0 and m) is correlated with a standard measure of lipophilicity (log P), as well as with the selected parameters of toxicity. Thus it has been found that thin-layer chromatography on reversed phase can be used reliably for describing the lipophilicity and for the evaluation of the toxic effects of diphenylacetamide derivatives.

scholarly journals Analytical control of active substances of the class of imidazolinones in herbicide formulations

2021 ◽  
pp. 15-18
Author(s):  
L. Cherviakova ◽  
T. Panchenko ◽  
O. Borzykh
Keyword(s):  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Polar Compounds ◽  
Analytical Determination ◽  
Analytical Control ◽  
Regression Equations ◽  
Detection Range ◽  
Layer Chromatography ◽  
Active Substances

Goal. The choice of a chromatographic method and the development of a method for the analytical determination of imazethapyr, imazamox, imazapyr in herbicide preparative forms in the joint presence. Methods. Active substances were analyzed by thin layer chromatography. The linear range of the dependence of the area of chromatographic zones on the amount of active substance was assessed by a mathematical-statistical method. Results. Determination of pesticides by thin-layer chromatography includes the main stages: classification of pesticides by polarity; extraction of active substances from the analyzed sample; chromatographic separation, detection and quantification. The decisive factor in the analysis stages is the dipole moment (μ, D), which characterizes the polarity of the compounds. Imazethapyr, imazamox and imazapir are polar compounds (μ≥6, D) with the corresponding values: 6.1; 6.4 and 6.8 D. Extraction of active substances is carried out with ethanol. Qualitative determination — in a thin layer of adsorbent silica gel in the mobile phase: a mixture of ethanol with acetic acid in a ratio of 4 : 1.5. Identify compounds at the wavelength of the spectrum λ 254 nm and using the developing reagent silver ammonia. The calibration dependence of the area of the chromatographic zone of the compound on its amount is linear in the detection range of 0.30—1.30 μg and is described by the regression equations for: imazethapyr S = 12.345 C + 0.7778, R2 = 0.99; imazapyr S = 9.3671 C + 1.081, R2 = 0.99; imazamox S = 7.6234 C + 1.4462, R2 = 0.98. The equation is used to quantify the active ingredients in the chromatogram. Conclusions. The use of the method of thin layer chromatography makes it possible to select selective conditions for the analysis of imazethapyr, imazamox, and imazapyr in the presence of herbicides in preparative forms. The developed technique is an express method of control and provides determination of active substances in the course of one analysis with high accuracy (relative error is less than 5% at n = 5, P = 0.95). The analytical support of the developed and patented method allows for analytical control of active substances of the imidazolinone class in the formulation of pesticides by analytical and toxicological laboratories, testing services without the use of expensive devices.

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