Spectral analyses of fresh and dry Hypericum perforatum L. Effects with colloidal nano silver 30 ppm

Ignatov, Ignat; Popova, Teodora P.; Bankova, Ralitsa; Neshev, Nikolai

doi:10.14719/pst.1429

Cited by 4 publications

(3 citation statements)

References 11 publications

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“…They were compared with those of other 1% solutions of medicinal plant extracts reported in (25,26), i.e.…”

Section: Resultsmentioning

confidence: 99%

“…The distribution of hydrogen bonds energy in the investigated solution was measured with an optical method invented by Antonov, based on the non-equilibrium process of droplets evaporation (20)(21)(22)(23)(24)(25). Its output is the so -called Non-equilibrium Energy Spectrum (NES), described by the function f(E) where the energy E is expressed in eV.…”

Section: One Percentmentioning

confidence: 99%

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Theoretical Analysis of Hydrogen Bonds, Energy Distribution and Information in a 1 % Rosa damascena Mill Oil Solution

et al. 2022

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The method of Non-equilibrium Energy Spectrum (NES) was applied in measurement of hydrogen bonds energy distribution in 1% Rosa damscena L. oil solution in deionized water. Local maxima in this spectrum were identical with these obtained in investigations of other biologically active solutions and related to particular bio effects as follows: (-0.1387 eV; 8.95 µm; 1117 cm-1). This local maximum is typical for antibacterial, anti-tumor and anti-inflammatory effects. The local maxima at (-0.1212 eV; 10.23 µm; 978 cm-1) and (-0.1262 eV; 9.82 µm; 1018 cm-1) are typical for anti-inflammatory effects and this at (-0.1112 eV; 11.15 µm; 897 cm-1) is typical for effects on the nervous system and nerve conductivity. Information theoretical analysis was performed using the values of Shannon entropy and Transformational information entropy, pointing to hydrogen bonds distribution similarities between Rosa damscena L., V. myrtillus L. and Salvia divinorum Epling. The possible chemical causes of these similarities were identified as antioxidant activity and polyphenols concentration.

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“…They were compared with those of other 1% solutions of medicinal plant extracts reported in (25,26), i.e.…”

Section: Resultsmentioning

confidence: 99%

Section: One Percentmentioning

confidence: 99%

Theoretical Analysis of Hydrogen Bonds, Energy Distribution and Information in a 1 % Rosa damascena Mill Oil Solution

et al. 2022

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“…In the present investigation, both of the above findings were used. The number of water molecules at (E = -0.1387 eV) (λ = 8.95 μm) (ṽ = 1117 cm -1 ) of Hypericum perforant L. are 11 (34). Mathematical models, using percentage distribution in the medicinal plants, were established on the basis of Ignatov's method.…”

Section: Mathematical Models and Cluster Analysesmentioning

confidence: 99%

Application of infrared spectral analyses for medicinal plants containing calcium (Ca2+)

Ignatov¹,

Balabanski²,

Angelcheva³

2022

Plant Sci. Today

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A study was performed with the methods of Non-equilibrium energy spectrum (NES), Differential non-equilibrium energy spectrum (DNES), mathematical models and water cluster analysis on the changes of hydrogen bonds energy distribution in aqueous solutions due to calcium ions (Ca2+) from the medicinal plants: Origanum vulgare L., Thymus vulgaris L., Mentha longifolia L., Petroselinum crispum Mill., Sideritis scardica Griseb., Salvia officinalis L. All of them are known to contain more than 1000 mg/100 g of calcium ions. The local maximum at (E = -0.1112 eV) (? = 11.15 ?m) (? = 897 cm-1) in all investigated solutions was associated with the presence of calcium ions by Student’s t-test at P<0,05. In the proposed practical approach, the solutions had similar clustering patterns at E = -0.1387 eV, corresponding to water clusters of 16-20 water molecules. These findings from different plant species further expand the evidence about the specific influence of calcium ions on the -0.1112 eV hydrogen bonds energy level in aqueous solutions.

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Determination of essential oil and chemical composition of St. John’s Wort

Doğan,

Fidan,

Baş

et al. 2024

Open Chemistry

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Considering it contains a variety of physiologically active compounds, including flavonoids, common phenols, and essential oils (EOs), St. John’s wort (Hypericum perforatum L.) is a common plant in Bulgaria that is predominantly used in folk medicine to cure various disorders. Determining the chemical makeup of St. John’s wort inflorescences that were gathered from northern Bulgaria was the purpose of this investigation. The antioxidant activity of H. perforatum L. extracts was assessed using 1,1-diphenyl-2-picrilhydrazyl (DPPH), ferric reducing antioxidant power (FRAP), and Trolox equivalent antioxidant capacity (TEAC) tests on methanol extract. The amount of EO obtained by water distillation was 0.08%, with its main components (over 3%) being n-nonane (27.46%), β-sesquiphellandrene (11.17%), heptanal dimethyl acetal (5.94%), ethyl hexyl ketone (5.93%), undecane (3.75%), sabinene (3.3%), and tridecyl alcohol (3.1%). Methanol extracts were obtained from the inflorescences, with the total flavonoid content determined as 8.66 mg quercetin equivalents (QE)/mg and total phenolic content as 271.33 mg Gallic acid equivalent/g. The FRAP assay yielded 493.07 µmol/L of antioxidant activity, while the TEAC assay yielded 106.39 µmol/L, respectively. Our findings enable a comprehensive characterization of H. perforatum from Bulgaria and an assessment of its oil suitability for potential industrial applications. Additionally, the results could guide the selection of specimens for future targeted breeding efforts.

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Spectral analyses of fresh and dry Hypericum perforatum L. Effects with colloidal nano silver 30 ppm

Cited by 4 publications

References 11 publications

Theoretical Analysis of Hydrogen Bonds, Energy Distribution and Information in a 1 % Rosa damascena Mill Oil Solution

Theoretical Analysis of Hydrogen Bonds, Energy Distribution and Information in a 1 % Rosa damascena Mill Oil Solution

Application of infrared spectral analyses for medicinal plants containing calcium (Ca2+)

Determination of essential oil and chemical composition of St. John’s Wort

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