First comprehensive study on total contents and hot water extractable fraction of selected elements in 19 medicinal plants from various locations in Nyamira County, Kenya

Nischwitz, Volker; Mogwasi, Richard; Zor, S.; Getenga, Zachary; Kariuki, David K.; Günther, Klaus

doi:10.1016/j.jtemb.2016.08.001

Cited by 17 publications

(19 citation statements)

References 11 publications

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“…The differences between this study and others may be due to the different sites and times of the plants collection (Jordán et al, 2013), as well as, to an important extent, the mass:water ratio used and the different aqueous extraction methods. These results clearly show that not only the total content of bioactive compounds of the plants is important for the estimation of the therapeutic or toxic effects, but also the actual protocol of intake (Nischwitz et al, 2017). The infusions were prepared with 0.5 g plant material for 5 min in 250 mL hot water.…”

Section: Bioactive Compounds and Antioxidant Activity Of The Medicinal Plant Infusionsmentioning

confidence: 92%

Antioxidant activity of nine medicinal plants with commercial potential

Trevizan

Soto

Parra

et al. 2020

Idesia

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Nine plants from the Puna ecoregion of northern Chile, traditionally used in ethnomedicine, were studied. The total content of phenolic compounds and their antioxidant capacity (ABTS, FRAP, and ORAC) were determined both in the dry material and in the infusions. To our knowledge, this is the first report on the antioxidant capacity for some of these plants and their infusions. Furthermore, these results show the diversity and complexity of the plants of the Chilean highlands with high potential to be used as a source of natural antioxidants in the reformulation and development of healthier foods.

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Section: Bioactive Compounds and Antioxidant Activity Of The Medicinal Plant Infusionsmentioning

confidence: 92%

Antioxidant activity of nine medicinal plants with commercial potential

Trevizan

Soto

Parra

et al. 2020

Idesia

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“…Violation of homeostasis is often connected with a deficiency or excess of certain elements (Kasi et al 2010;Gupta et al 2014;Nischwitz et al 2014). Physiological value of microelements makes up a basis of their division in organs and tissues in our organism.…”

Section: Relevancementioning

confidence: 99%

“…The whole set of factors influence a human being; content of inorganic elements is only one of them. The value of biologically active substances is that they are contained in herbal raw material in naturally balanced complexes and are an important source of macroand microelements in a human organism (Gupta et al 2014;Nischwitz et al 2014;Perekhodko 2015). Chemical elements in plants are often connected with biologically active organic substances (enzymes, vitamins, hormones) and influence their biosynthesis.…”

Section: Relevancementioning

confidence: 99%

Research of element composition of Verbena species

Posatska¹,

Struk²,

Grytsyk³

et al. 2021

PHAR

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Violation of homeostasis is often connected with a deficiency or excess of certain elements. Undeniable value of biologically active substances of plants is that they are contained in plant raw material in natural balanced complexes and they are an important source of macro- and microelements for a human organism. Study of a chemical composition, including macro- and microelements, a pharmacological effect of Verbena species is a basis for conduction of further researches. There are 250 species of Verbena genus, 3 of which, namely Verbena officinalis L., Verbena supina L. and Verbena hybrida Hort are growing in Ukraine. The aim of our research was to study macro- and microelements in the raw material of Verbena genus species, to reveal the influence of the conditions of growing on the content of elements in the Verbena officinalis L. herb, to compare element composition of the Verbena officinalis L. herb and herbal extracts. Macro- and microelement composition of raw material was researched by using the method of atom-emission spectrometry with inductively bounded plasma iCAP 7000 Duo. To determine the influence of the conditions of increase of macro- and microelements in Verbena officinalis L. herb, their quantity in soils and plants from different areas of growing was defined. To reveal the intensity of absorption of macro- and microelements from the soil by the plants, the coefficients of their biological accumulation were calculated. The comparative determination of the element composition of Verbena officinalis L. herb and herbal extracts VOH-0 (extractant – purified water) and VOH-7 (extractant – 70% ethanol) was also carried out to determine the degree of elements transfer from plant raw material into extracts. Results of the research show that in the samples of Verbena officinalis L. herb, Verbena hybrida Hort. herb and Verbena supine L. leaves there are 22 inorganic elements. Results of studying of element composition of Verbena officinalis L. herb and samples of soil from different areas of growing in Ivano-Frankivsk and Ternopil regions show that the quantitative and qualitative compositions of microelements depend on element exchange of these plants, conditions of growing and element composition of soil. The reverse dependence between the content of most elements in the soil and the coefficient of their accumulation in plants was found out. Concentration of elements in the herb and extracts was identified to have the same profile, but the quantitative content of elements was different, which was influenced by the extractor (purified water, 70% ethanol). Results of our research are currently relevant; they should be taken into account in the development of new herbal medicines, which would have desirable pharmacological effect in the future.

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“…This requirement is not observed in the third world countries where the use of plants is neither controlled nor regulated by quality assurance parameters (Annan et al 2010;Khan 2013;Ogunbanjo et al 2016;Adie and Adekunle 2017). Though the determination of the total content of the heavy metal in the plants give an indication of the levels of toxicity much more information can be obtained by measuring the bioavailability and bio accessibility (Arpadjan et al 2008;Intawongse and Dean 2008;Musa Özcan et al 2008;Yemane et al 2008;Jayawardene et al 2010;Lv et al 2013;Zhu et al 2013;Okem et al 2014;Čadková et al 2015;Parviz et al 2015;Bolan et al 2016;Pizarro et al 2016;Yang et al 2016;Nischwitz et al 2017;Mogwasi et al 2018;Zhou et al 2018;Mogwasi et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Assessment of bio-availability of Cd, Pb, As and Tl via Gastric/Intestinal Digestion in Plants Collected From Different Kenyan Regions

Mogwasi

Getenga

Olale

et al. 2021

Preprint

Self Cite

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In this study, total and bio-available levels of cadmium (Cd), Lead (Pb), arsenic (As) and Thallium (Tl) in 19 Kenya plants from two study sites (Manga and Borabu) were evaluated. ICP-MS technique was used to determine total Cd, Pb, As and Tl contents, while ultra-filtration and physiological extraction tests evaluated bio-accessibility of these elements. The plants had low concentrations; Cd (0.27±0.02 and 0.26±0.02), As (0.32±0.02 and 0.48±0.04), Tl (0.07± 0.02 and 0.06±0.01) and Pb (1.23±0.11 and 1.16±0.10) mg/kg in Manga and Borabu sites. However, sequential ultra-filtration showed more than 70% high molecular weight species (>10 kDa) predominated with Pb, Cd and Tl. The physiological based tests showed Cd, Pb, As and Tl extracted enzymatically were significantly higher (0.45±0.11, 0.46±0.12, 0.37±0.10 and 0.81±0.19µg/g) than aquatically extracted (0.32±0.07, 0.34±0.11, 0.26±0.08 and 0.50±0.27) µg/g, (p<0.05). Low bio-accessibility levels of these elements in medicinal plants justifies their use therapeutically.

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First comprehensive study on total contents and hot water extractable fraction of selected elements in 19 medicinal plants from various locations in Nyamira County, Kenya

Cited by 17 publications

References 11 publications

Antioxidant activity of nine medicinal plants with commercial potential

Antioxidant activity of nine medicinal plants with commercial potential

Research of element composition of Verbena species

Assessment of bio-availability of Cd, Pb, As and Tl via Gastric/Intestinal Digestion in Plants Collected From Different Kenyan Regions

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