مقالات رزومه دکتر مرضیه باباش پور اصل

Using organic and inorganic substances is a healthy and affordable way to enhance fruit quality during storage. Apple is a popular fruit with high nutritional value and mainly experiences prolonged storage periods. The present study was conducted to optimize the shelf-life of apple fruits (Malus domestica Borkh. ‘Golden Delicious’) by Aloe vera gel and calcium chloride (CaCl2) and to evaluate apple characteristics after 90 days of cold storage. Using response surface methodology (RSM), measurements were aimed at fruit weight loss, pH, total soluble solids (TSS), total sugar (TS), fruit firmness, and juice content. As evidenced from RSM analysis, optimal conditions for apple shelf-life were achieved by 5.9% CaCl2 and 33.6% Aloe vera gel, which reduced weight loss and maintained fruit firmness, pH, total soluble solids, total sugars, and juice content. Aloe vera gel and CaCl2 showed similar modes of action in each case of the measured traits, except for TSS where the Aloe vera gel increased apple TSS, whereas CaCl2 decreased it. Therefore, an optimized combination of Aloe vera gel and CaCl2 offered a promising approach to the maintenance of apple quality in storage.

Drought is the most important stress factor that reduces plant growth and yield. However, the application of moisture absorbents may decrease the negative effects of drought. This study aims to investigate the effect of irrigation levels (irrigation after 140, 100, and 70 mm evaporation from pan evaporation) and moisture absorbents (without moisture absorbent, superabsorbent, vermiculite, zeolite, and the combined use of all three moisture absorbents) on yield components and physiological characteristics of safflower (Carthamus tinctorius L. cv. Goldasht). This experiment was performed in 1397 and 1398 as the split-plot design using the randomized complete block design with three replications. Results showed that under 140 mm evaporation due to the severe drought, seed yield and oil yield declined by 36.3% and 46.6%, respectively, as compared to the 70 mm evaporation. As usual, drought increased the malondialdehyde content significantly. Water absorbent treatments increased the grain yield as compared to the control. However, there were no significant differences in the effect of water absorbents on the grain yield but the most effective moisture absorbent to increase the oil yield was zeolite. Oleic and palmitic acids percent increased due to drought, while the amount of linoleic acid decreased with increasing the irrigation intervals. In conclusion, the results showed that the use of moisture absorbents alleviated the adverse effects of drought stress on the safflower yield and some yield components.

This study has aimed to determine the amount of flavonoids, anthocyanins, total phenolic compounds, ascorbic acid and antioxidant activity of the grape in the polar and nonpolar sub-fractions of methanolic extracts with two extraction methods, maceration and ultrasonic. The phenolic compounds content and antioxidant activity of selected grape (Vitis vinifera L. "Red Seedless") from Maragheh region, East Azerbaijan (Iran) were investigated with a view to their exploitation as a potential source of natural antioxidants. Antioxidant activities of the samples were determined by three testing systems namely DPPH, β-carotene/linoleic acid and reducing power assays. In the DPPH system, the highest radical scavenging activity was observed by the polar sub-fraction of the methanolic extract in frozen fruits (IC50 = 26.34 ± 6.5 μg/ml). In order to evaluate the efficiency of different methods for the extraction of the main polyphenols in grape, two methods were tested and compared. The results showed that the maceration method is better method as compared to the ultrasonic method. These advantages are visible on extracting of the flavonoids, anthocyanin, total phenolic, ascorbic acid contents and antioxidant capacity. Our findings demonstrate that the methanolic extracts of frozen and dried fruits of Vitis vinifera may be suggested as a strong potential source of natural antioxidant.

This study evaluates the reliability of polystyrene/MgAl-layered double hydroxide as a 3D new nanostructure solid phase microextraction fiber coating for extraction and determination the essential oil of Grammosciadium platycarpum Boiss. & Hausskn. growing wild in Maragheh region, East Azerbaijan province, Iran. The Headspace solid phase microextraction coupled with gas chromatography/mass spectrometric method was applied for analyzing of volatile oils. The Headspace solid phase microextraction parameters including the extraction temperature and time, sample weight, and water amount were optimized. The method was compared with traditional hydrodistillation. The analysis of the oils resulted in the identification of 31 compounds. Linalool (57.31 and 61.05%) and α-humulene (5.62 and 4.82%) were found to be the major components, in hydrodistillation and headspace solid phase microextraction methods, respectively. The novel 3D nanostructure fiber coating based on MgAl LDH had the advantages of the strong interaction between analyte and sorbent, simplicity, high thermal stability and more convenient handling than the other traditional SPME fibers. Although to date, SPME devices have been used mainly in laboratory applications, recent research has been directed towards remote monitoring, particularly for clinical, field environmental and industrial hygiene applications.

This study aimed to determine the amount of flavonoids, anthocyanins, total phenolic compounds, ascorbic acid and antioxidant activity of the peel and pulp of the quince (Cydonia oblonga Mill.) in the polar and nonpolar sub-fractions of methanol extracts with two extraction methods, Soxhlet and microwave. The antioxidant properties were assessed by the ability to quench the stable free radical 2,2-diphenyl-1-picrylhydrazyl (DPPH), ferric reducing antioxidant power (FRAP) and β-carotene bleaching assays. The results showed that the Soxhlet method extracted higher amount of the phytochemicals. In the DPPH system, the highest radical scavenging activity was seen by the polar sub-fraction of the methanol extract in the peel of quince fruit (IC50=52±7.3 μg/mL). Among all the extracts analyzed, the polar sub-fraction of the peel extract exhibited a significantly higher total flavonoid (62.33±3.1 mg CTE/100 g), anthocyanin (1.54±0.24 μg C-3-GE/100 mg fresh weight), phenolic content (108.14 μg GAE/mg) and antioxidant activity than other samples with Soxhlet extraction method. Fruit has a number of bioactive ingredients and many of them were concentrated in the peel of the fruit rather than the flesh. Therefore, enjoy the benefits that unpeeled fruit offers! The present study revealed that the peel of quince fruit has higher phytochemicals and antioxidant properties when compared to the pulp.

The objective of this study is determination the volatile compounds of Matricaria chamomilla of an inorganic–organic hybrid material based on ZnO nanoparticles anchored to a composite made from polythiophene and hexagonally ordered silica (ZnO/PT/SBA-15) as a solid-phase fiber microextraction (SPME). Microextraction techniques with nanoparticles ZnO/PT/SBA-15 resulted in a more efficient analyte enrichment, faster sample preparation, and lower solvent consumption. Furthermore, they are simple, inexpensive, environmentally friendly, and compatible with many analytical instruments. Using ZnO/PT/SBA-15 followed by GC–MS, 37 compounds were separated and identified in Matricaria chamomilla, which mainly included α-bisabolol(17.51%), Cis-trans-farneso(8.72%), β-bisabolene(8.37%), E-β–Farnesene(5.48%) Guaiazulene(4.36%), α-Pinene(3.68%) and Limonene(3.24%). The presented experimental results clearly demonstrate that prepared fibers are suitable for SPME analyses of volatile oils. For optimization of the microextraction conditions by the ZnO/PT/SBA-15 SPME fiber, a one at the time optimization strategy was used. The optimized parameters were sample state and its amount, extraction temperature and time and finally desorption conditions.

In the current study, simultaneous extraction and concentration of the analytes from the headspace on the solid phase microextraction (SPME) fiber were followed by transferring the essential oil components of Salvia hydrangea DC to the headspace with the help of a heating source. The essential oil components of the plant were extracted and concentrated in a single step. A one-at-the-time optimization procedure was applied to the microextraction conditions by using the nanocomposite fiber of polypyrrole/SBA-15. The results of the essential oil extraction of Salvia hydrangea clearly demonstrated that polypyrrole/SBA-15 fibers were efficient with SPME technique. The acceptable SPME precision in our study was corroborated by the relative standard deviation (RSD) values of less than 15%. In comparison to the hydro-distillation (HD) method, the SPME technique could equally provide monitoring of almost all the constituents of the studied essential oil in an easier way and shorter time with much lower amounts of the plant sample. The results of the essential oil extraction of Salvia hydrangea clearly demonstrated that polypyrrole/SBA-15 fibers were efficient with SPME technique.

Many members of the Amaryllidaceae are regarded as toxic. The toxic constituents that occur in the whole family are referred to as the Amaryllidaceae alkaloids. The main aim of this study was the identification of alkaloid compounds from Galanthus transcaucasicus Fomin, a medicinal plant from Amaryllidaceae.

Planar and column chromatography techniques were used for isolation of alkaloid components. GC/MS analysis was carried out for the identification of alkaloid compounds.

Silica gel column chromatography of the alkaloidal extract of G. transcaucasicus bulbs afforded seven fractions. Preparative thin layer chromatography of these fractions led to the isolation of compounds 1 (nerinine)and 2 (homolycorine). Galantamine was not detected in any of these fractions.

Our findings showed that G. transcaucasicus could be a new source of bioactive alkaloids for possible applications in pharmaceutical industries.

To optimize conditions for micropropagating Galanthus transcaucasicus Fomin, the effect of explant type, different concentrations of sucrose, type and different concentrations of auxin were examined on bulblet production. For the induction of bulblets, three types of bulb scales were usesd as explants. A two-step sterilization procedure was applied. Assessments were made after incubation for 20 weeks at 23±1ºC with 16h photoperiods. Highest number of bulblets were proliferated culturing bulb scales on modified MS medium supplemented with 2.0 mg.l-1 BA and 2.0 mg.l-1 IBA. About 27% of bulblets were bigger than 5 mm in diameter, suitable for acclimatization. With the increase of sucrose concentration, number of bulblets decreased, but their size increased. This protocol provided a basis for future study on large-scale multiplication system for commercial nurseries of Galanthus transcaucasicus.