A New Humic Acid Preparation with Addition of Silver Nanoparticles

Alexandrova, G. P.; Dolmaab, G.; Tserenpil, Sh.; Grishenko, L. A.; Сухов, Б. Г.; Regdel, D.; Trofimov, B. A.

doi:10.1007/978-94-007-5634-2_142

Cited by 7 publications

(15 citation statements)

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“…The surface plasmon bands for nano-sized Ag formed in natural rubber matrix were ranged between 425-484 nm [4], while it was at about 418 nm for Ag/polyvinyl alcohol [11] composite, where particles sizes were 4-10 nm and <10 nm, respectively. The XRD spectrum, in Fig.3 (trial 8), was consistent with published data on nano-sized metal Ag [7] and demonstrated the existence of Ag 0 in the product. All the prominent peaks at 2θ values of about 38, 44.2, 64.4, 77.6 and 81.6 0 represent the 111, 200, 220, 311 and 222 Bragg's reflections of Ag crystal.…”

Section: Resultssupporting

confidence: 76%

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A new humic acid remedy with addition of silver nanoparticles

Alexandrova

Dolmaa²,

Enkhbadral³

et al. 2014

Mong. J. Chem.

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ABSTRACT:Previously known biogenic stimulator humic acid (HA) was the subject of this current study and HA based new remediation was developed by addition of silver (Ag) nanoparticles in its macromolecule. Extracted HA from a healing mud was characterized and used as reducing agent for Ag ion as well as a stabilizer for the formed Ag nanoparticles. The properties of the obtained hybrid composite were examined by XRD, UV and FTIR spectroscopic techniques. The diameter of the nanoparticles in the HA polymer was up to 8.6 nm and they were identified to be metallic Ag.

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Section: Resultssupporting

confidence: 76%

“…Synthesis of HA/Ag hybrid composite. Synthesis of HA/Ag organic and inorganic hybrid composite with antibacterial capacity was performed based on a method [7]. For each set of experimental trials, 400 mg of peloid HA was dissolved in 6 mL of 1 N NaOH solution and heated for 15 minutes.…”

Section: Materials and Reagentsmentioning

confidence: 99%

A new humic acid remedy with addition of silver nanoparticles

Alexandrova

Dolmaa²,

Enkhbadral³

et al. 2014

Mong. J. Chem.

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“…The molecular structure of HA is an aromatic non-organized polymer containing phenolic, carboxylic, as well as hydroxyl, methoxyl, aldehyde and keton groups. Nitrogen and sulphur atoms are also often found (Alexandrova et al, 2013;Spaccini et al, 2019). The average molecular weight is 6500.…”

Section: Bioactive Components In Sapropelmentioning

confidence: 99%

“…The average molecular weight is 6500. The main structural skeleton is made up of poly-functional groups attached to a condensed aromatic ring, with polypeptides and polysaccharides bound to it (Alexandrova et al, 2013). HAs are found to range from a yellowish to a dark brown colour and to lend the HS its colour.…”

Section: Bioactive Components In Sapropelmentioning

confidence: 99%

“…They are found to be soluble in water at higher pH values but insoluble under acidic conditions (Caseldine et al, 2000). The HA molecule reacts with the cell walls of an organism as well as with the receptors in the dermis due to the aromatic nucleus and functional groups, additionally penetrating through tissues and producing a therapeutic effect (Alexandrova et al, 2013;Canellas et al, 2015;Jacob et al, 2019). HA facilitates the regeneration of nervous tissues, stimulates the macrophage defence reactions and tissue reparation, as well produces an anti-inflammatory effect in the case of tissue burns and cornea diseases (Dolmaa et al, 2011;Rensburg, 2015).…”

Section: Bioactive Components In Sapropelmentioning

confidence: 99%

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Freshwater Sapropel: Biologically Active Components and Methods of Extraction

Kļaviņa

Auce

Pavlovska

et al. 2020

PNS

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Previously, sapropel has been commonly used in agriculture, cosmetology and medicine in its raw form and there has been no generally accepted method or standard for realizing sapropel extract. However, for sapropel usage in medicine, balneology and pharmacy, it is essential to develop quality criteria for raw sapropel and its extracts. This review aims at discussing and summing up different techniques for extracting bioactive compounds from sapropel as well as the possibilities of creating quality criteria. This paper covers existing analytical techniques and methodologies; currently, there are few extraction methods using several extractants for obtaining bioactive components from raw sapropel. Different freshwater sapropel types have been described and characterized. Bioactive components in sapropel have been identified and explained. Humic acids and fulvic acids have been identified as the main substances and their extraction methods have been listed. Solid-liquid, ultrasound assisted and supercritical fluid extraction methods have been pointed out as the most suitable. Additionally, analysis and storage conditions of the extracts have been discussed. There have been found to be no commonly accepted standard methods for sapropel extraction, or for the analysis and characterization of the sapropel extracts. For pharmacological applications, a common approach for the extraction process of active substances from sapropel and the analysis procedures of the extracts need to be established. This review will help equip other researchers with the latest information on this topic.

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