Elemental composition of non-oak wood extracts commonly used in Balkan cooperage

In the production of some alcoholic beverages one of the most important practices is theageing process in a presence of wood. This process contributes to improved sensorycharacteristics such as aroma, color, taste and astringency. Although oak heartwood isthe most used material in cooperage, other species such as chestnut, cherry, and mulberrycan be also considered. Currently, limited published data are available on the mineralcontent of the wood extract from cooperage industry, although some research was doneto investigate the content of heavy metals in alcoholic beverages1, especially in wine2.Daily consumption of the wine and brandy with an elevated content of heavy metalsmight cause chronical poisoning. To avoid this issue, the maximum allowableconcentration (MAC, mg L–1) in fruit brandies were established for lead, zinc, arsenium,and copper.1The aim of this research was to investigate elemental composition of ethanolic extracts,obtained from alternative wood species used in Balkan cooperage, such as mulberry(Morus alba L.), Myrobalan plum (Prunus cerasifera Ehrh.), black locust (Robiniapseudoacacia L.), and wild cherry (Prunus avium (L.) L.). Elements were determined byinductively coupled plasma-optical emission spectroscopy (ICP-OES). Results indicatedthat the elemental composition of wild cherry extract was much lower than in other nonoakwood extracts, and all investigated wood extracts have lower content of traceelements than maximum allowable concentration in fruit brandies.Abstract: [https://cherry.chem.bg.ac.rs/handle/123456789/5297

Elemental composition of non-oak wood extracts commonly used in Balkan cooperage

In the production of some alcoholic beverages one of the most important practices is the ageing process in a presence of wood. This process contributes to improved sensory characteristics such as aroma, color, taste and astringency. Although oak heartwood is the most used material in cooperage, other species such as chestnut, cherry, and mulberry can be also considered. Currently, limited published data are available on the mineral content of the wood extract from cooperage industry, although some research was done to investigate the content of heavy metals in alcoholic beverages1, especially in wine2. Daily consumption of the wine and brandy with an elevated content of heavy metals might cause chronical poisoning. To avoid this issue, the maximum allowable concentration (MAC, mg L–1) in fruit brandies were established for lead, zinc, arsenium, and copper.1 The aim of this research was to investigate elemental composition of ethanolic extracts, obtained from alternative wood species used in Balkan cooperage, such as mulberry (Morus alba L.), Myrobalan plum (Prunus cerasifera Ehrh.), black locust (Robinia pseudoacacia L.), and wild cherry (Prunus avium (L.) L.). Elements were determined by inductively coupled plasma-optical emission spectroscopy (ICP-OES). Results indicated that the elemental composition of wild cherry extract was much lower than in other nonoak wood extracts, and all investigated wood extracts have lower content of trace elements than maximum allowable concentration in fruit brandies.Poster: [https://cherry.chem.bg.ac.rs/handle/123456789/5303

Rapid Electrochemical Method for the Determination of L-DOPA in Extract From the Seeds of Mucuna Prurita

This work presents the electrochemical behavior of levodopa (L-DOPA), at boron-doped diamond (BDD) electrodes, using cycling voltammetry (CV), in Britton-Robinson (BR) buffer solution, and application of the proposed electrode for the determination of L-DOPA in extracts from the seeds of velvet bean (Mucuna prurita Hook or Mucuna pruriens (L.) DC.). L-DOPA provides a well-defined and single oval-shape oxidation peak at +0.8 V vs. Ag/AgCl (3 M KCl) reference electrode in BR buffer solution at pH 3.0. Experimental parameters, such as pH of supporting electrolyte and square wave voltammetry (SWV) operating parameters (frequency and modulation amplitude) were optimized. The effect of possible interferences was evaluated. Under optimal conditions the detection limit of the developed method was 0.8 mu M and the calibration curve for L-DOPA was linear in the range from 2 to 100 mu M. The proposed method was successfully applied to the determination of L-DOPA in an extract from the seeds of Mucuna prurita. The obtained result was in good agreement with obtained by photometry with 2,2'-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid (ABTS). The developed approach can be beneficial for the quantification of L-DOPA using a BDD electrode as up-to-date potential alternative sensor for electroanalytical applications

Karakterizacija Morus vrsta u odnosu na mikro, makro i toksične elemente

This study examines the mineral composition of the extracts of the fruits, leaves and roots of white mulberry (Morus alba L.) and black mulberry (Morus nigra L.) grown in Serbia. All extract samples of white and black mulberry were analyzed for the content of micro (B, Co, Cr, Cu, Fe, Li, Mn, Ni, Se, Sr, Zn), macro (Ca, Mg, Na), and toxic metals (Al, As, Cd, Hg, Pb) by inductively coupled plasma optical emission spectrometry (ICP-OES). The study revealed that parts of the plant had statistically significant impact on the levels of the examined elements among the two Morus species. All extracts contained high amounts of Ca, Mg, Na, B, Cu, Fe, Mn and Zn. The studies showed that in the most of extracts dominant macro element was Mg (591- 1942 μg/g of dry extract), while dominant microelements were Zn, B, Cu in all extracts, except for the black mulberry leaves, whose extract was most abundant in Fe (143 μg/g of dry extract). The highest content of micro and macro elements was detected in the extract of black mulberry leaves. This work contributes to the knowledge of the nutritional properties of Morus species. The obtained results may be useful in the evaluation of new dietary and food products.Ispitivanje je bazirano na određivanju mineralnog sastava ekstrakata Morus alba L. (beli dud) i Morus nigra L . (crni dud) uključujući plod, list i koren sa teritorije Srbije. U svim analiziranim ekstraktima određen je sadržaj mikro (B, Co, Cr, Cu, Fe, Li, Mn, Ni, Se, Sr, Zn), makro (Ca, Mg, Na) i toksičnih elemenata (Al, As, Cd, Hg, Pb) primenom optičke emisione spektroskopije sa induktivno kuplovanom plazmom (ICP-OES). Ispitivanje je pokazalo da postoji statistički značajna korelacija između delova biljke Morus vrste i sadržaja ispitivanih elemenata. U svim ekstraktima je dokazan visok sadržaj elemenata: Ca, Mg, Na, B, Cu, Fe, Mn i Zn, respektivno. Dominantan makro element u većem broju ekstrakata je Mg (591 - 1942 μg/g suvog ekstrakta). Što se tiče mikroelemenata, u svim ispitivanim ekstraktima u većem sadržaju su zastupljeni Zn, B i Cu. U uzorku M. nigra posebno se izdvaja Fe po svom sadržaju (143 μg/g suvog ekstrakta) u odnosu na ostale prisutne elemente. Od svih ispitivanih uzoraka najviši sadržaj mikro i makro elemenata je detektovan u ekstraktima lista M. Nigra. Ovaj rad doprinosi poznavanju nutritivnih svojstava Morus vrsta. Dobijeni rezultati mogu biti korisni u kreiranju novih dijetetskih i prehrambenih proizvoda

Supplementary material for the article: Ognjanović, M.; Dojčinović, B.; Fabián, M.; Stanković, D. M.; Mariano, J. F. M. L.; Antić, B. Microwave Assisted Hydrothermal Synthesis of (Fe,Co)3O4 Nanoparticles in the Presence of Surfactants and Effects of Co/Fe Ratio on Microstructure and Magnetism. Ceramics International 2018, 44 (12), 13967–13972. https://doi.org/10.1016/j.ceramint.2018.04.246

Supplementary material for: [https://doi.org/10.1016/j.ceramint.2018.04.246]Related to published version: [http://cherry.chem.bg.ac.rs/handle/123456789/2170]Related to accepted version: [http://cherry.chem.bg.ac.rs/handle/123456789/3236

Supplementary data for the article: Ognjanović, M.; Stanković, D.; Ming, Y.; Zhang, H.; Jančar, B.; Dojčinović, B. P.; Prijović, Ž.; Antić, B. Bifunctional (Zn,Fe)3O4 Nanoparticles: Tuning Their Efficiency for Potential Application in Reagentless Glucose Biosensors and Magnetic Hyperthermia. Journal of Alloys and Compounds 2019, 777, 454–462. https://doi.org/10.1016/j.jallcom.2018.10.369

Supplementary material for: [https://www.sciencedirect.com/science/article/pii/S0925838818340684?via%3Dihub]Related to published version: [http://cherry.chem.bg.ac.rs/handle/123456789/361]Related to accepted version: [http://cherry.chem.bg.ac.rs/handle/123456789/2797

Chemical Composition, Total Phenols and Flavonoids Contents and Antioxidant Activity as Nutritive Potential of Roasted Hazelnut Skins (Corylus avellana L.)

The present study evaluates natural composition of Serbian roasted hazelnut skins (HS) with potential role in application as functional nutrient of various food products. Total phenols (TPC) and flavonoids contents (TFC) in HS extracts obtained with dierent ethanol concentrations (10%—I, 50%—II and 96%—III) and their antioxidant activities were investigated. The highest total phenols content (706.0 9.7 mgGAE/gextract) was observed in 96% ethanol HS extract. Ethanol HS extracts showed very high antioxidant activity with eective concentrations (EC50) ranged between 0.052 and 0.066 mg/mL. The phenol and flavonoid content of roasted HS extracts I–III was determined by HPLC-ESI-MS/MS analyses. Contents of lipids, proteins, carbohydrates, metals, and C, H, N, S elements in roasted HS were also determined. Relatively high C/N, C/P and C/N/P ratios, rich metal contents and fatty acids composition indicated that hazelnut skin might be a good candidate for use as either human or fungal functional nutrient. In addition, possible application of phenolic HS extracts as UV booster was studied by recording UV spectra (220–440 nm) of 10 mg/L of HS extracts I–III combined with 10 mg/L of chemical sunscreen agent benzophenone-3 and in vitro sun protection factor (SPF) was calculated

The comparison of sample extraction procedures for the determination of cations in soil by IC and ICP-AES

This paper presents the extraction of cations from a soil sample, type ranker on serpentinite, in deionized water, by use of three different extraction techniques. The first extraction technique included the use of a rotary mixer, the second technique involved the use of a microwave digestion system with different extraction temperatures, and the third technique employed an ultrasonic bath with different extraction times. Ion chromatography was used for determining the concentration of Li, Na, K, Ca, Mg and ammonium ions in soil extracts with subsequent determination of concentrations for all cations, except for ammonium ion extraction, conducted by Inductively Coupled Plasma-Atomic Emission Spectrometry. The results of cation extractions showed that microwave assisted extraction was most efficient for the Li, Na, K, Ca, Mg, Co, Mn, Ni, Pb and ammonium ions. Use of a rotary mixer for extraction was most efficient for Cd and Zn ions, while use of ultrasound bath was most efficient for Cr, Cu, Fe and Al ions. Several times higher amount of cations extracted by the most efficient, compared to the second best technique, under optimal conditions, were noticed in the case of: Ca, Mg, Co, Mn, Fe, Al, and Zn ions

Bakterijsko luženje metala iz elektronskog otpada pomoću At. ferrooxidans

U ovom radu je ispitano biološko luženje metala (Cu, Sn, Ni, Zn i Ag) iz matičnih ploča personalnih računara pomoću Acidithiobacillus ferrooxidans (At. ferrooxidans).Poster: [https://cherry.chem.bg.ac.rs/handle/123456789/5406

Bakterijsko luženje metala iz elektronskog otpada pomoću At. ferrooxidans

Poster presented at XLIX Savetovanje Srpskog hemijskog društva, (13-14. maj 2011., Kragujevac)Abstract: [https://cherry.chem.bg.ac.rs/handle/123456789/5405