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Articles by M. Azizi
Total Records ( 4 ) for M. Azizi
  M. Zarei , M. Azizi and Z. Bashiri-Sadr
  Pomegranate is an important source of bioactive compounds and has been used extensively in the folk medicine of many centuries. The objective of this study was to analyse and compare the physico-chemical characteristics and bioactive compounds of pomegranate juices obtained from six pomegranate cultivars grown in Iran. This study showed that there were significant differences among the cultivars in all measured factors. The total soluble solids content (°Brix) varied from 15.77 (Shirin-e-Bihaste) to 19.56 (Rabbab-e-Fars), pH values from 3.06 (Faroogh) to 3.74 (Shirin-e-Mohali), titrable acidity concentration (g/100 g) from 0.51 (Shirin-e-Bihaste) to 1.35 (Rabbab-e-Fars) and total sugars content (g/100 g) from 16.88 (Rabbab-e-Fars) to 22.76 (Faroogh). The highest and lowest level of total anthocyanins (mg/100 g) were recorded in Aghaye and Shahvar (27.73 and 7.93), respectively. The concentration of ascorbic acid (mg/100 g) was between 8.68 (Aghaye) and 15.07 (Shirin-e-Bihaste). The total phenolics content (mg tannic acid/100 g) ranged from 526.40 (Shahvar) to 797.49 (Aghaye). The total tannins level (mg tannic acid/100 g) was observed in the pomegranate cultivars between 18.77 (Shahvar) and 38.21 (Aghaye). The values of the condensed tannins (mg catechin/100 g) ranged from 12.14 (Shirin-e-Bihaste) to 12.57 (Aghaye). The antioxidant activity varied from 46.51 (Shahvar) to 52.71% (Aghaye). The results also showed that antioxidant activity was positively correlated with total phenolics (r = 0.912), total tannins (r = 0.838), condensed tannins (r = 0.859) and total anthocyanins (r = 0.928). These data suggested that the cultivar was the main parameter which influences the composition of bioactive compounds in pomegranates.
  F. Shahriari-Ahmadi , E. Dehghan , M. Farsi and M. Azizi
  In this study the tip of meristem in diploid plants (2n = 2x =28) were treated with a 0.2% colchicine solution and flowcytometry was used to determine the DNA ploidy level of different tissues in individual plants. Morphological characteristics such as size and thickness of leaves, flowers, seeds, epidermis and guard cells, as well as the number of chloroplast in guard cells were considered as other parameters for identifying putative tetraploid plants. We show that, the DNA ploidy of Hyoscyamus muticus, treated with Colchicine can be evaluated using flow cytometry. In addition we also report reliable morphological markers to identify putative tetraploids in this species. Although, tetraploidy was induced using this technique, mixoploid plants were also observed among the Egyptian henbane plants. The results of this study also indicate that colchicine treatment can efficiently be used to improve Hyoscyamus muticus for commercial and pharmaceutical applications of its vegetative organs.
  H. Nemati , T. Nazdar , M. Azizi and H. Arouiee
  In order to compare of different methods and identify the optimum condition for tomato seed extraction, factorial experiments with 3 replications was conducted. In the first experiment, pulp of two tomato cultivars (Faraon, Dominator) were fermented at two temperatures (25, 35°C) and six periods (24, 48, 72, 96, 120, 144 h). The germination of seeds in laboratory as well as seedling emergence and preliminary growth in greenhouse were studied and measured. The results showed that effect of cultivar on traits (except of seedling emergence) was significant. Also the effect of temperature of fermentation, duration of fermentation and also interaction effects of them on seed germination were significant. Totally seed quality decreased with increasing temperature and duration of fermentation and the fermentation duration from 24 to 48 h at temperature 25°C, is recommended. In the second experiment, tomato seeds were extracted by HCL (pH was arranged to 1, 2, 3 for 10, 20, 30 min), H2SO4 (pH was arranged to 1, 2, for 15, 30 min), Sodium carbonate (5, 10% for 24 and 48 h) and fermentation. Percentage germination, germination rate, length of radicle and length of plumule were used for seed quality assessment. The results showed that interaction effect between pH and duration of HCL treatments was significant for seed germination (percentage and rate) and there was an interaction effect between concentration and duration for germination rate in alkali treatments. Different extraction methods had not detrimental effect on percentage germination, but acid treatments produce very bright clean seeds in compare to other treatments.
  A. Rangavar , V.A. Rojkov , M.G. Nurberdiev and M. Azizi
  Field experiments were conducted at Sanganeh Research Station at North-east of Iran to determining runoff production, soil accumulated moisture and develop semiempirical model to determine the best plant row spacing for reclamation and optimum production of degraded rangelands under natural precipitation. Runoff production and soil accumulated moisture were determined in 80 experimental plot on different combination of soil type, vegetation cover and slop gradient, during autumn, winter and spring precipitations during 1996-2005. Results from 90 precipitation events with various magnitude and intensity indicated that, soil accumulated moisture was not considerable in September to November period and the amount of evapotranspiration was more than precipitation up to 6 fold. The average of soil accumulated moisture, evapotranspiration and surface runoff in winter were calculated around 64, 33 and 3% of precipitation, respectively. In spring, the average of evapotranspiration, infiltration and runoff were 62, 36 and 2% of the rainfalls, respectively. The resulted values for moisture accumulation in the soil and surface runoff on the experimental plots make it possible to estimate the potential deficit of moisture and assess the water supply of the plant. Experimental data was used to develop a semiempirical model for determining the best plant row spacing for optimum production and water requirement of pastures. Generally we concluded that there is a strong possibility for reclamation of eroded rangelands using surface runoff in arid and semi arid regions.
 
 
 
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