scholarly journals Effect of cultivar and year of harvest on the mineral composition of Algerian extra-virgin olive oils

2020 ◽  
Vol 18 (1) ◽  
pp. e0901
Author(s):  
Karima Benamirouche-Harbi ◽  
Sonia Keciri ◽  
Zohir Sebai ◽  
Hicham Benamirouche ◽  
Lilya Boudriche
Keyword(s):  
Mineral Composition ◽  
Mineral Content ◽  
Graphite Furnace ◽  
Principal Component ◽  
Absorption Spectrometry ◽  
Mineral Elements ◽  
Technical Institute ◽  
Mineral Contents ◽  
Virgin Olive Oils ◽  
Olive Oils

Aim of study: To evaluate the effect of cultivar and year of harvest on the content of mineral elements of Algerian extra virgin olive oils.Area of study: Technical Institute of Arboriculture of Fruits and Vine (TIAFV), Bejaia, Algeria.Material and methods: The mineral contents of extra virgin olive oils from ten cultivars during two consecutive campaigns 2014/2015 and 2015/2016 were determined using atomic absorption spectrometry and absorption in a graphite furnace after microwave-assisted acid digestion. Principal component analysis was applied to correlate the mineral content with cultivar type and year of harvest.Main results: Mean concentrations for Fe, Zn, Cu, Na, K, Mg, As and Co in samples were observed in the range of 1.640-13.213, 1.546-32.866, 1.375-3.337, 19.666-104.720, 4.573-117.133, 0.120-2.560, 0.006-0.146 and 0.002-0.051 μg g-1, respectively. The first three principal components retained 76.25% of the variance. The determinants of the effect of cultivar type and year of harvest were Fe and Na; Mg, Co and As, respectively.Research highlights: The study showed that mineral composition of the olive oils was mainly determined by the cultivar and the year of harvest.

scholarly journals Mineral composition of wheat species as influenced by different fertilizer sources and different weed control practices

2022 ◽  
Author(s):  
Sancar Bulut
Keyword(s):  
Weed Control ◽  
Mineral Composition ◽  
Mineral Content ◽  
Organic Fertilizer ◽  
Animal Health ◽  
Mineral Elements ◽  
Control Methods ◽  
Wheat Species ◽  
Mineral Contents ◽  
Wheat Varieties

Abstract This research was carried out to determine the effects of agronomic practices on the mineral composition of organically-grown wheat species. In terms of all nutrients evaluated, the mineral content of wheat showed significant differences according to crop years, varieties, weed control methods and fertilizer sources. As the average of all factors, the Cu, Fe, Mn, Se, Zn, Cd, Co, Cr, Ni and Pb contents of the ground wheat grain were; 3.93, 42.8, 79.6, 0.549, 11.34, 0.012, 0.140, 0.194, 3.71 and 0.269 mg / kg, respectively. According to the wheat varieties, the Kırik was superior in terms of Cu, Fe, Se, Zn, Co and Cr, and the Dogu-88 was superior in terms of Mn, Cd, and Ni. The effect of weed control methods on mineral content was variable. According to fertilizer sources, the highest mineral content was obtained from the control plots without fertilizer treatments. The lowest mineral contents were obtained from chemical fertilization, cattle manure and organic fertilizer applications. There was no significant increase in the mineral content of wheat with organic fertilization, however, organic agriculture still preserves its place in terms of healthy food. As a result, it has been determined that the values obtained for all mineral elements were not at a level that pose a risk on the environment, human and animal health according to WHO.

scholarly journals High-Throughput Chemometric Quality Assessment of Extra Virgin Olive Oils Using a Microtiter Plate Reader

Sensors ◽  
2019 ◽  
Vol 19 (19) ◽  
pp. 4169
Author(s):  
Huihui He ◽  
Weiying Lu
Keyword(s):  
Quality Assessment ◽  
High Throughput ◽  
Latent Variables ◽  
Scatter Correction ◽  
Principal Component ◽  
Microtiter Plate ◽  
Food Ingredients ◽  
Virgin Olive Oils ◽  
Olive Oils ◽  
Plate Reader

A commercially available microtiter plate reader was applied as a high-throughput counterpart of ultraviolet-visible (UV–Vis) spectrophotometer to identify the producing location of extra virgin olive oils (EVOOs). Multiplicative scatter correction and the first derivative was used to denoise the UV–Vis spectra and eliminate the effects of background drift. The spectra were analyzed using chemometrics methods including the principal component analysis (PCA) and the partial least squares-discriminant analysis (PLS-DA). The PLS-DA model on full spectra using 5 latent variables showed a classification accuracy of 97.92% by cross-validation. The overall results demonstrated that the use of a UV–Vis spectrophotometer based on the microtiter plate reader combined with chemometrics can be applied to the quality assessment of EVOOs. It is demonstrated that the microtiter plate reader can be a high-throughput tool in the quality assessment of food ingredients.

scholarly journals Chemical and Sensory Profiling of Monovarietal Extra Virgin Olive Oils from the Italian Marche Region

Antioxidants ◽  
2020 ◽  
Vol 9 (4) ◽  
pp. 330 ◽  
Author(s):  
Deborah Pacetti ◽  
Maria Chiara Boarelli ◽  
Rita Giovannetti ◽  
Stefano Ferraro ◽  
Paolo Conti ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Sensory Analysis ◽  
High Performance ◽  
Principal Component ◽  
Tocopherol Content ◽  
Volatile Fraction ◽  
Virgin Olive Oils ◽  
Olive Oils ◽  
Marche Region ◽  
Total Antioxidant

Chemical and sensory peculiarities of monovarietal extra virgin olive oils (MEVOOs) from the cultivars (cvs.) Ascolana tenera (ASC), Coroncina (COR), Mignola (MIG), Piantone di Mogliano (MOG), and Raggia (RAG) from Marche region (Italy) are investigated. Their polar phenolic substances and α-tocopherol are analysed through high performance liquid chromatography with different detectors. Volatile substances, fatty acid composition, and squalene are analysed by gas chromatography coupled to mass spectrometry (MS) and to the flame ionization detector, respectively. Total antioxidant activity and sensory analysis were also performed. MOG showed high squalene content (on average 0.88 ± 0.16 g/100 g), high relative amount of α-copaene among volatiles, and the highest oleic acid percentage. MIG had high α-tocopherol content (on average 350.0 ± 57.6 mg kg−1) and high α-farnesene in the volatile fraction. ASC showed the highest sensory quality and the lignan pinoresinol with higher concentration as compared to the other MEVOOs (p < 0.05), which resulted in a possible chemical marker for this cv. RAG was characterized by the sensory note of almond, which corresponds to its highest (E)-2-hexenal percentage. Sensory analysis and an antioxidant activity assay performed on a set of industrial extra virgin olive oils purchased in supermarkets, highlighted MEVOOs’ superiority from these points of view. Principal component analysis displays the main characteristics of the cvs. investigated.

scholarly journals Proximate and Mineral Nutrition of Common Bean Genotypes as Influenced by Harvesting Time

2021 ◽  
Vol 14 (1) ◽  
pp. 85
Author(s):  
Onkgolotse G. Moatshe-Mashiqa ◽  
Patrick K. Mashiqa ◽  
Odireleng O. Molosiwa
Keyword(s):  
Common Bean ◽  
Mineral Composition ◽  
Mineral Content ◽  
Nutritive Value ◽  
Field Experiments ◽  
Mineral Contents ◽  
Harvesting Time ◽  
Global Food Security ◽  
Zn Content ◽  
Proximate And Mineral Composition

Common bean is the most consumed legume by humans and hence significant for global food security and nutritive value mainly iron (Fe) and zinc (Zn). The objective of the study was to evaluate the effect of harvesting time and genotypes on proximate and mineral composition of common bean. Two field experiments were carried out in Sebele (24o33&prime;S, 25o54&prime;E, 994 m above sea level) horticultural fields during summer 2018/2019. Treatments included two common bean genotypes DAB 564 (white) or 520 (red) and three harvesting stages as the early, mid and late season harvest. In both seasons, genotype and harvesting time significantly (P &lt; 0.05) influenced proximate, macro and micro mineral composition of common bean seeds. Generally genotypes studied had a sufficient amount of proximate and mineral content with crude protein, iron (Fe) and zinc (Zn) content as the most abundant minerals at a range between 20-22%, 33-101 mg g-1 and 41-45 mg g-1, respectively across harvesting times. Genotype DAB 564 (white coloured) significantly (P &lt; 0.05) produced seeds with the highest concentration of proximate and mineral contents especially zinc (45 mg g-1) and iron (70 mg g-1) content irrespective of season. Harvesting common bean seed early or mid-stage produced high seed concentration of proximate, micro and macro mineral content across genotype or season.

scholarly journals Genetic Variation for Biofortifying The Maize Grain

2016 ◽  
Vol 4 (8) ◽  
pp. 684 ◽  
Author(s):  
Gönül Cömertpay ◽  
Faheem Shehzad Baloch ◽  
Halil Erdem
Keyword(s):  
Starch Content ◽  
Principal Component ◽  
Mineral Elements ◽  
Quality Traits ◽  
Maize Breeding ◽  
Mineral Contents ◽  
Maize Germplasm ◽  
Geographical Regions ◽  
Maize Landraces ◽  
Maize Grain

The maize germplasm variation is valuable for breeders to develop elite hybrids with increased mineral contents in the maize grain to eliminate mineral malnutrition, which is referred as HIDEN HUNGER. Therefore, we aimed to determine mineral element diversity of maize landraces collected from different geographical regions of Turkey. There was huge diversity for all mineral traits and other quality traits. Turkish maize landraces showed high variation for Zn (17-41.34 mg kg-1), Fe (13.52-29.63 mg kg-1), Cu (0.77-3.34 mg kg-1), Mn (5.68-14.78 mg kg-1), Protein (6.6-11.6%), starch content (73.3-80.0%), oil content (3.15-4.7%) and thousand grain weight (177.0-374.9g). There were significant positive and negative associations among mineral elements and quality traits. The principal component analysis differentiated some maize landraces from the rest, and these diverse landraces could be used in the maize breeding program with biofortification purpose.

scholarly journals Lead, mercury and arsenic content in spices: Black, white and green pepper, black cumin and ginger

2015 ◽  
Vol 13 (3) ◽  
pp. 191-202 ◽  
Author(s):  
Slavica Blagojevic ◽  
Stevan Blagojevic ◽  
Biljana Begovic
Keyword(s):  
Maximum Concentration ◽  
Graphite Furnace ◽  
Microwave Digestion ◽  
Hydride Generation ◽  
Absorption Spectrometry ◽  
Human Consumption ◽  
Arsenic Content ◽  
Mineral Contents ◽  
Green Pepper ◽  
Black Cumin

In order to evaluate the safety of selected commercial spices brands, concentration of lead, mercury and arsenic, as well as moisture and mineral contents were analyzed in samples of dried black and white pepper powders, black, white and green peppercorns, black cumin seeds and ginger powder. Lead (Pb), mercury (Hg) and arsenic (As) concentrations in spice samples purchased from local markets in Belgrade were determined, after a microwave digestion of the samples, by atomic absorption spectrometry (AAS), using the graphite furnace AAS technique (Pb), cold vapor AAS technique (Hg) and hydride generation AAS technique (As). Trace levels of Pb, Hg and As in the selected dried spices samples were in the range 0.10 ppm - 0.79 ppm, 0.01 ppm - 0.10 ppm and 0.01 ppm - 0.51 ppm, respectively. The maximum Pb concentration was determined in the sample of ginger and it was 0.79 ppm, the maximum concentration of Hg was 0.10 ppm, determined in green peppercorns samples, while the maximum concentration of As in powdered black pepper sample was 0.51 ppm. The moisture and mineral contents in the different analyzed spices were in the range 1.70-13.10% and 3.40-6.50%, respectively. According to the obtained results, the concentrations of the analyzed toxic elements, as well as the moisture and mineral content in selected spices, were below the maximum permissible limits declared by the national legislations deemed safe for human consumption.

scholarly journals Physico-chemical and sensory evaluation of virgin olive oils from several Algerian olive-growing regions

OCL ◽  
2021 ◽  
Vol 28 ◽  
pp. 55
Author(s):  
Malika Douzane ◽  
Mohamed-Seghir Daas ◽  
Amel Meribai ◽  
Ahmed-Hani Guezil ◽  
Abdelkrim Abdi ◽  
...  
Keyword(s):  
Olive Oil ◽  
Virgin Olive Oil ◽  
Principal Component ◽  
Great Variability ◽  
Olive Cultivar ◽  
Virgin Olive Oils ◽  
Olive Oils ◽  
Physical Chemical ◽  
Physico Chemical

Olive cultivar diversity is rich in Algeria but most remain unexplored in terms of quality traits. This work aimed to evaluate the physicochemical and organoleptic quality of twenty olive oil samples belonging to four Algerian cultivars (Chemlal, Sigoise, Ronde de Miliana and Rougette de Mitidja) collected throughout the national territory. Physical-chemical and sensory results showed that 60% of the oils belong to the extra virgin category, while 40% were classified as “virgin olive oil”. The results of the principal component analysis (PCA) revealed a great variability in fatty acids composition between the samples depending on the cultivar and origin. Oleic acid was the most abundant and varied between 64.84 and 80.14%. Extra virgin olive oils with quality attributes are eligible for a label. Rougette de Mitidja, Ronde de Miliana and Sigoise from Oran showed great potential.

CHEMICAL COMPOSITION OF AQUATIC MACROPHYTES. III. MINERAL COMPOSITION OF FRESHWATER MACROPHYTES AND THEIR POTENTIAL FOR MINERAL NUTRIENT REMOVAL FROM LAKE WATER

1978 ◽  
Vol 58 (3) ◽  
pp. 851-862 ◽  
Author(s):  
A. JABBAR MUZTAR ◽  
S. J. SLINGER ◽  
J. H. BURTON
Keyword(s):  
Mineral Composition ◽  
Aquatic Plants ◽  
Aquatic Macrophytes ◽  
Myriophyllum Spicatum ◽  
Mineral Elements ◽  
Mineral Nutrient ◽  
Vallisneria Americana ◽  
Mineral Contents ◽  
Freshwater Macrophytes ◽  
Phosphorus Levels

Mineral composition of aquatic plants from Chemung Lake and Lake Ontario was investigated. The four species harvested at progressive dates in 1974 showed no trend of variation in their individual mineral contents. This was probably because some dates did not correspond with a specific growth stage. All the four species harvested at three dates, except Myriophyllum spicatum and Vallisneria americana collected in September, were extremely high in ash. Myriophyllum and Vallisneria harvested in September represented immature plants, since these were obtained from sites harvested previously and consequently were much lower in ash. Calcium and phosphorus levels varied with the ash content, with the former being the major cation in all species. Analyses of washed and unwashed samples of several macrophytes harvested in 1975 showed that extremely high ash was the result of surface calcification with CaCO3. Silica, Co, Cu and Se were present at safe levels for feeding to animals. Results indicated that harvesting aquatic plants has the potential to remove large quantities of mineral nutrients from the aquatic environment, and feeding good quality plants to herbivore and poultry could meet their requirements for many of the mineral elements.

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