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Showing 21 results for mohtarami


Volume 11, Issue 0 (بهار و تابستان 87- 2008)
Abstract

Objective: Ajowan is an annual herbaceous essential oil of Carum copticom. The main components of the oil are Tymol, β-pinene, γ- terpinene and Sabinene.The fruit oil of Carum copticum has been reported to have several therapeutic effects including anti fungal, anti bacterial and anti viral,... Candida albicans is an opportunistic fungus and transforms into pathogenic form in favorable conditions, causing fungal diseases. Materials and Methods: In this study, essential oil and alcoholic extract of Carum copticum were gained and Microdilution Broth method were used for detection of minimum inhibition concentration (MIC) and minimum fungicide concentration (MFC) of 11 clinical isolates of Candida albicans and Standard strain (PTCC50-27). Results: Results show that MIC for essential oil is 0.43 µg/ml, 0.87 µg/ml and for alcoholic extract is 3.51 µg/ml, 7.03 µg/ml, 1/75 µg/ml. Thus, it seems that Carum copticum could inhibit Candida albicans growth by a similar mechanism which occurs by Fluconazole (FLZ). In general, the results obtained in this study indicate that Carum copticum has potential values for growth inhibition of Candida albicans in vitro. Conclution: In recent years, systemic fungal infections due to Candida species have been received major consideration about inducing mortality in nosocomial patients because of increasing in immunocompromised disorders such as AIDS and hematological disorders as well as long term use of Phlebotomus perfiliewi transcaucasicus sandflies. Conclusion: This is the first report on natural infection of sand flies to L. donovani in the country and since the ecology and biology of L. donovani differs extensively from L. infantum, it is necessary to perform further studies to highlight the role of L. donovani in epidemiology of VL in the region and country.

Volume 12, Issue 2 (6-2009)
Abstract



Volume 12, Issue 3 (9-2009)
Abstract

Objective: Relapsing fever caused by Borrelia persica is an acute tick-borne disease which is transmitted by soft ticks of Ornithodoros tholozani to human. The disease is reported from Middle East and many regions of Iran. Detection of infection is problematic since the suspected infected ticks should be fed on animal hosts such as guinea pigs and subsequently after 7-14 days, the animal blood should be microscopically investigated for Borellia spirochetes on a Giemsa stainined thick smear. This classic method named xenodiagnosis is hard, time consuming, and less reliable. In this study, the application of PCR technique has been examined for detection of Borellia persica in soft ticks of O. tholozani. Materials and Methods: Tick specimens were collected from northwestern Iran and were fed on Borellia persica infected guinea pigs. DNA of the animal blood were extracted and used as target for PCR amplification of 16rDNA gene. Subsequently the products were subjected to sequencing. The effect of tick sex and post digestion as well as the minimum number of spirochetes on the efficiency of PCR were also tested. Results: The xenodiagnosis assay was able to detect infection in only 13.3% of the tick-bitten animal bloods whereas all of these blood specimens were PCR positive against the 16rDNA gene. There wasno difference in results of PCR for male and female of the ticks. Post digestion of infected blood meal in ticks did not affect the efficacy of PCR and the recently-fed samples showed similar results to those of completely gravid ones. A test on the threshold sensitivity of PCR assay indicated that only one spirochete is enough for the primers to anneal and to amplify the target gene. Conclusion: This study describes the first molecular assay for diagnosis of B. persica infected ticks in Iran and due to its high speed, accuracy, and applicability is a substitution method for diagnostic purposes in TBRF foci.

Volume 15, Issue 81 (11-2018)
Abstract

The increasing environmental problems caused by synthetic polymers used in food packaging demonstrate the need for extensive research into the development of biodegradable packaging. The aim of this study was to investigate the effect of adding clay nanoparticles to sodium caseinate biofilm as a factor enhancing its properties. For this purpose, composite films based on caseinat sodium with 0 to 1.5% nanoclay and 0 to 500 ppm Echinophora platyloba essential oil. The effects of nanoclay and essential oil on surface properties, transparency, mechanical properties, water vapor permeability and antioxidant properties were studied. The results showed that the addition of nanoclay has improved the mechanical properties of composites. In this regard, films made of 75 % of nanoclay have the highest tensile strength. The film containing 25% of nanoclay had the highest percentage of elongation at break point. The study of the microstructure of the film shows that the addition of nanoclay reduced the permeability of films to water vapor and also reduced the density of films and Causing their surface to become uneven. The compatibility of Echinophora Platyloba Essential Oil with caseinat sodium also produced satisfactory results in order to produce an active film of bionanocomposite. The film containing 500 ppm of essential oil showed an antioxidant activity of 78%. Overall, , The results showed that nanoclay can have positive effects on the physical properties of sodium caseinate and help to improve its properties.

Volume 15, Issue 85 (3-2019)
Abstract

The aim of the study was to determine the Suitable concentration of Arabic gum, sodium caseinate and beta-cyclodextrin to encapsulation of pomegranate seed oil. For this purpos Beta-cyclodextrin, sodium caseinate and Arabic gum as wall covering by Mixture Design for trapping pomegranate seed oil were used and Then optimized samples with the least turbidity to determine viscosity, encapsulation efficiency, SEM, FT-IR and DLS were choiced. Turbidity of treatments increased at high levels of sodium caseinate as well as in the combination of Arabic gum with beta-cyclodextrin in lack of sodium caseinate. Results of Viscosity showed that the sample containing beta-cyclodextrin-sodium caseinate had a high viscosity than the Arabic gum-sodium caseinate. The maximum encapsulation efficiency was observed in sample containing of sodium casheinate (37.1%) and Arabic gum (62.9%), which had the lowest surface oil. According to the results of DLS , the smallest capsule diameter was related to the sample containing of beta-cyclodextrin and sodium caseinate (439 nm), and had an inverse relationship the diameter of the capsules with the polydispersity index, and values of Zeta potential in the sample containing 62.9% Arabic gum + 37.1% Sodium caseinate was maximum (-25.7). FT-IR results showed the electrostatic interactions in the formation of capsules and their stability. According to SEM images, the capsules irregularly and different morphologically were formed. Therefore, according to the results, 37.1% sodium caseinate and 62.9% Arabic gum is suggested for encapsulation of pomegranate seed oil.

Volume 16, Issue 86 (4-2019)
Abstract

Carrot Pomace Powder is one of the wastes that will be obtained during carrot processing so because of desired nutritional composition (especially fiber and salts); it can be used to increase the nutritional value of gluten-free bread. The purpose of this study was to investigate the effect of CPP­(0-30%) on the physico-chemical, textural and sensory properties of gluten free bread based on the replacement of gluten-free flours­(chickpea flour, Rice flour and corn starch) for celiac diseases. The results showed that the water activity, moisture, ash, a­* value, fiber, protein and antioxidant capacity of samples containing CPP was significantly higher than the control­ones­(P­<0.05). Increasing of CPP decreased carbohydrate, calorie, L­* value, specific volume and fat of gluten-free bread samples. With replacement of CPP in bread formulation, cohesiveness increased but firmness, springiness, gumminess, chewiness and resilience of samples decreased. According to the sensory evaluation, substitution of CPP up to 30% increased the overall acceptance of samples. Generally the results showed that the sample containing 30% CPP had better quality than others, and CPP is suitable factor to increase the nutritional value of gluten-free bread.

Volume 16, Issue 97 (March 2020)
Abstract

Acorn tree is abundant in many parts of Iran and is usually wasted or used as animal feed. According to the numerous health effects of acorn, the aim of this research is to investigate the influence of acorn flour (substituted at levels of 0-30% with rice flour, corn flour and starch) as a mixture design on chemical, nutritional, textural and sensorial properties of gluten free biscuits for celiacs. The results showed that moisture, ash, crude fiber, carbohydrate, antioxidant capacity and total phenol of gluten free biscuits supplemented with acorn flour increased noticeably compared to control. Increasing the acorn flour decreased calorie value of gluten free biscuits. Hardness and penetration energy of samples increased with substitution of acorn flour in formulation. Sensory evaluation showed addition of acorn flour up to 20% was acceptable but total acceptance diminished at high levels of it. The obtained results signify that the application of acorn flour in gluten-free baking could be useful for fortification and increase of nutritional value.

Volume 18, Issue 113 (july 2021)
Abstract

The purpose of this study was investigating the effect of wheat flour replacement with triticale flour (0-30%) and β-glucan fiber (0-10%) on physicochemical, texture and sensory properties of Barbari bread with using of two-level factorial design containing central points based on D-optimal. The results showed that with substitution of these two factors, the water activity, moisture and ash content in bread samples significantly increased and the fat, carbohydrate and calorie of the samples decreased. Antioxidant capacity and protein of samples increased with replacement of triticale flour. However, high levels of β-glucan decreased the protein and antioxidant capacity of the samples. Also the fiber content of samples decreased and increased with addition of triticale flour and β-glucan, respectively. The effect of replacement of triticale flour on the specific volume of bread was dependent on the amount of β-glucan; so that the specific volume of bread with replacement of triticale in the samples without β-glucan significantly decreased but it increased in the samples containing high levels of β-glucan. Loss weight, crust and crumb color, firmness and penetration energy of bread were not significantly affected by the substituted factors. According to the sensory evaluation, the replacement of triticale flour and β-glucan increased the flavor score and overall acceptance of barbari bread samples. According to the results, bread samples enriched with 30% triticale flour and 10% β-glucan have desirable physicochemical, texture and sensory properties and are recommended as optimum samples for production.

Volume 18, Issue 119 (january 2021)
Abstract

Oleaster Powder can be used to enrich and improve the nutritional value of gluten-free baked products, which often have low fiber content, due to their desirable nutritional properties such as minerals, vitamins and rich in dietary fiber; therefore the aim of this study was to enrich gluten-free bread with Oleaster Powder and create a new product with suitable texture and nutritional quality; for this purpose in this study, the effect of replacing of Oleaster Powder at levels 0-30% with gluten-free flours (chickpea flour, Rice flour and corn starch) on physicochemical, textural and sensory properties of gluten-free bread was evaluated based on response surface methodology (RSM). The results showed that by increasing the level of Oleaster Powder moisture content, ash, fiber, antioxidant capacity, lightness (L­*)  and yellowness value (b­*) of the samples significantly increased and the amount of fat, protein, carbohydrate, calories and redness (a *) of the samples decreased (P <0.05). Also the water activity was not affected by the factor (P>­0.05).With increasing the level of Oleaster Powder, the firmness and gumminess of breads increased significantly. On the other hand, at levels higher than 7.5% of Oleaster Powder, specific volume, cohesiveness and resilience of samples decreased and the loss weight of samples increased (P <0.05). In spite of increasing springiness and chewiness of samples with addition of Oleaster Powder, they were not statistically significant (P>­0.05). According to sensory evaluation, the sample containing 7.5% Oleaster Powder had a higher overall acceptance. Finally, the results showed that the sample enriched with 7.5% Oleaster Powder had desirable properties compared to other samples and can be used as a pragmatic raw material in the production of gluten-free breads with high and desirable nutritional value.

Volume 18, Issue 121 (March 2022)
Abstract

This study aimed to investigate the effect of replacing wheat flour with spinach powder (0-30%) as a rich source of fiber and minerals using a mixture design based on D-optimal on physicochemical properties (weight loss, moisture, ash, protein, fat, fiber, antioxidant capacity, color, specific volume, height, water activity) and textural and sensory properties of bread. According to the results, with the addition of spinach powder moisture content, ash, fiber increased but weight loss, protein, fat, specific volume, water activity and height of the samples decreased, significantly. The antioxidant capacity of supplemented bread with spinach powder was significantly higher than the control sample (p <0.05). Also, textural properties including firmness and penetration energy were significantly increased by adding spinach powder. Spinach powder supplementation led to a decrease of  L *, a *, and an increase of  b* in the samples. According to the results, replacing wheat flour with spinach powder up to 7.5% improved the overall acceptance of the samples.

Volume 19, Issue 122 (April 2022)
Abstract

Bioactive peptides are special protein components that have a significant effect on human body function. In this study, the effect of proteins and peptides resulting from the hydrolysis of amaranth proteins (total protein, albumin, and globulin) at levels 1 to 5% and different hydrolysis times (0.5, 1.5, 3, and 5 hours) on The properties of sourdough and the quality of bread were investigated. The results showed that the peptides obtained by hydrolysis of total amaranth protein in 3 hours had the greatest effect on the growth of Lactobacillus Plantarum (PTCC 1896) (11.40 Log CFU / mL) and Saccharomyces cerevisiae (PTCC 5052)  (8.32 Log CFU / mL) in vitro. These microbes are the main flora of sourdough and different amounts of peptides on their growth were statistically significant compared to the control sample. The titratable acidity and pH ‌ after 16 hours of fermentation at 30 ° C in the wet dough containing 5% peptide were 13.33 mL NaOH and 4.6, respectively, which was higher than other treatments. The highest amount of water activity, specific volume, titratable acidity, and the lowest enthalpy in bread was prepared from sourdough containing 3% peptide. Therefore, bread made from sourdough containing 3% peptides was selected as the best treatment to increase the quality of bread.

Volume 19, Issue 125 (July 2022)
Abstract

Today, consumers' interest in consuming healthy foods with high nutritional value has drawn the attention of everyone, especially researchers, to the use of healthy foods, further the use of probiotics and prebiotics in bakery products, especially sourdough bread. Bulk bread samples prepared with sourdough containing probiotic Bacillus coagulans and prebiotic fructooligosaccharide (FOS) were characterized for their physical, chemical, and sensory attributes. The results showed that by adding sourdough containing B.coagulans to bulk bread compared to the control, acidity, specific volume, moisture, height, crust hardness, cohesiveness, springiness, chewiness, and sensory evaluation decreased but hardness increased. In this study, water activity was not influenced by factors. In contrast, adding sourdough containing B.coagulans and FOS to bulk bread significantly affected hardness, chewiness, crust penetration, color, and hardness during storage, as well as sensory evaluation. However, it significantly reduced the specific volume, height, and moisture indices compared to the control sample. Consequently, sourdough containing B.coagulans and FOS has provided bread with desirable properties and may be used as a starter culture for creating bulk bread with high nutritional and functional properties.

Volume 20, Issue 4 (10-2018)
Abstract

The aim of this study was to evaluate the effects of inulin (IN) and resistant dextrin (RD) as fat replacer and prebiotic on gluten-free biscuit and its dough. To make the gluten-free biscuits, we used rice flour, corn flour and corn starch in the proportion of 3:1:1, respectively. The influence of prebiotics on the dough properties was studied via texture profile analysis including firmness, cohesiveness, adhesiveness, gumminess and springiness. Biscuit quality was assessed by spreading behavior, texture and surface characteristics, chemical properties, and sensory evaluation. Compared to the control, a significant increase in firmness (17.04 N to 52.85 N), cohesiveness (0.49 to 0.65) and gumminess (8.45 N to 32.71 N) of dough (except RD25) was observed when substitution percent of fibers increased. Adhesiveness and springiness did not have significant changes. Enhancing of fat replacement percentage caused significant changes compared to the control in hardness (9.60 to 24.52 N) and L* (58.79 to 56.94), a* (8.99 to 9.71), water activity (0.225 to 0.096), moisture (4.97% to 4.12%), total fat (12.65% to 3.90%), peroxide index (1.89 to 0.90 meq/kg), fiber (2.02% to 9.51%), carbohydrate (76.49% to 84. 63%), and calorie (443.38 to 396.52 Kcal). The consumers did not find significant differences in acceptability between the control biscuits and the biscuits with 25% of fat replaced by RD and IN except color and flavor that were better than the control. Gluten-free biscuits containing IN25 and RD25 were similar to the control biscuits, and they could have additional health benefits derived from IN and RD presence.
 

Volume 20, Issue 135 (May 2023)
Abstract

In this research, flax seed mucilage was extracted. Composite film of sodium alginate and flax seed mucilage was prepared. Norbixin pigment and tungsten oxide (WO3) nanoparticles were used to modify the film structure. The color, crystallite, thermal and mechanical properties of the films were investigated. Also, the antibacterial properties of the prepared films against Escherichia coli and Staphylococcus aureus bacteria were investigated. The obtained results showed that the pure alginate/mucilage film does not have very high transparency, which is reduced by adding tungsten oxide nanoparticles and norbixin pigment. The effect of tungsten oxide nanoparticles in reducing film transparency has been greater than that of Norbixin. Examining the factor a (green-red) shows that this factor has increased with the increase of Norbixin and tungsten oxide nanoparticles. Examining factor b (blue-yellow) shows that with the increase of Norbixin and tungsten oxide nanoparticles, this factor has increased. By examining the XRD spectrum of the pure alginate/mucilage film, it was found that this film showed two broad peaks at 2θ of 10° and 20°, which indicates the relatively amorphous structure of this film. In the alginate/mucilage film modified with tungsten oxide nanoparticles, the peaks related to the crystalline nanoparticles in 2θ of approximately 25, 30, 35, 40, 50, 55 and 65 degrees are quite clear, which shows that these nanoparticles improve the crystalline structure of the film. By examining the TGA curves of the films, it was found that the addition of tungsten oxide nanoparticles and norbixin pigment increased the thermal stability of the film. Examining the antibacterial property of the films showed that the addition of tungsten oxide nanoparticles and norbixin pigment increased the antibacterial property of the film significantly (p<0.05).


Volume 20, Issue 138 (August 2023)
Abstract

Pomegranate peel could have medicinal or industrial applications, however, is consideredan agro-industrial residue.The present study aimed to investigate the replacement  effect of pomegranate  peel extract (PPE) with water (0-12%)  and tomato pomace powder (TPP) with cake flour (0-10%) on the physicochemical (moisture content, dough density, acidity, and color), phytochemical (total phenolic content and antioxidant capacity), textural, and sensory properties of sponge cake based on combined (mixture-mixture) design. The obtained results showed that replacing TPP with cake flour increased dough density. Replacing TPP with cake flour and PPE with water darkened the color of the crumb. The moisture content of the samples decreased with the replacement of TPP and PPE. Increasing the level of TPP and PPE resulted in increased total phenol and antioxidant capacity. Substitution of PPE and TPP increased the acidity of samples on 1st day of baking. However, PPE decreased the acidity of samples compared to the control ones during storage time (7th day). The energy and hardness of samples with the incorporation of TPP up to 6% increased but at high levels (>6%) decreased. The results of the sensory evaluation showed that incorporation of TPP and PPE decreased the overall acceptability score of samples (p<0.05). However, the overall acceptance of all samples was higher than the acceptable limit (>3.7). According to the sensory results, replacing 6% TPP with cake flour with 7% PPE instead of water in sponge cake formulation produced a high nutritional value product with the same sensory characteristics as the control ones.
 


Volume 20, Issue 140 (October 2023)
Abstract

The present study aimed to investigate acorn flour (0-30%) and acorn syrup (0-100%) substitutions with wheat flour (cake flour) and sugar respectively on the properties of sponge cake based on combined design. The results showed that replacing acorn flour (AF) with wheat flour increased the dough density and baking loss% and decreased cohesiveness, lightness (L*), and redness (a*). Incorporating acorn syrup darkened the color of the crust. The Moisture content and specific volume were not affected by the replacement of flour and syrup of acorn. Addition of the acorn flour and acorn syrup enhanced water activity, firmness, chewiness, and diminished springiness. Sensory evaluation showed that with the replacement of acorn syrup, the overall acceptability of samples decreased, but acorn flour had no significant effect on it. According to the optimization results, it is suggested to substitute 11% acorn flour along with 25% or 45% acorn syrup to produce a high nutritional product with desirable textural and sensory characteristics.


Volume 20, Issue 140 (October 2023)
Abstract

In this paper, the possibility of producing sponge cake by replacing triticale flour (TF) (0-30%) and beta-glucan fiber (BG) (0-10%) was investigated by utilizing a two-level factorial design containing central points. According to the results, by increasing TF and BG replacement ratio in the cake formulation, moisture content, water activity, ash, fiber, and antioxidant capacity increased, whereas carbohydrates, calories, and lightness of cases decreased. Moreover, the specific volume of cakes in those samples containing TF decreased, while adding the BG fiber can lead to improving it. Meanwhile, as BG and TF levels increased, the hardness of the samples increased while their cohesiveness and springiness decreased. On the other hand, BG replacement did not have a significant effect on the chewiness and gumminess, whereas TF may lead to increasing them. The overall acceptance of the samples increased with the simultaneous replacement of TF and BG. Furthermore, the numerical optimization confirmed that it is possible to produce enriched and desirable cakes via high utility through a combination of 30% TF and 8.3% BG.
 

Volume 21, Issue 6 (10-2019)
Abstract

In this work, pomegranate juice was adulterated manually by adding sour cherry and red grape juices. Physicochemical properties (brix, acidity, formalin index, reducing sugar, and total sugar) and Volatile Organic Compounds (VOCs) gas chromatography profile (extracted by PPy-Ag nano-fiber) of pure pomegranate juice and adulterated pomegranate juice were evaluated and used to find adulteration. PPy-Ag nano-fiber as a Head-Space Solid Phase Micro Extraction-Gas Chromatography (HS-SPME-GC) method was used to extract and detect the VOCs profile (total peak area and total peak height) of different juices. The Box-Behnken Design (BBD) was used to study the effects of Pomegranate Juice (PJ), Sour Cherry Juice (SCJ) and Grape Juice (GJ) percent (V/V%) in the adulterated mix juice physicochemical properties and GC-profile. Results showed that the percent of pomegranate juice, sour cherry juice, and grape juice affect the juice physicochemical property, and there are relations between the physicochemical property of the juice and VOCs gas chromatography profile (total peak area and total peak height) that can help to find adulteration. The presented research makes it possible to detect adulteration of sour cherry and grape juice and their percent in the adulterated mix by analyzing the juice physicochemical properties and GC-profile.
 

Volume 21, Issue 146 (April 2024)
Abstract

Drying is one of the effective ways to increase shelf life and preserve the useful compounds of materials, which can be improved by using different methods and materials. The use of bioactive compounds as a pre-treatment can be one of the effective methods to increase functional and antibacterial properties. This research was conducted to simultaneously apply ultrasonic pretreatment and pure apple vinegar before drying garlic slices, and investigate their effect on the functional and antibacterial properties of dried garlic slices by hot air. Before drying, the slices were floated in pure apple vinegar and distilled water under ultrasonic treatment (frequency of 40 kHz) for 10 minutes at 35oC, and also in pure apple vinegar for 10 minutes at 35oC. Then they dried using a hot air circulation dryer at a temperature of 50oC to reach a moisture content of 6% (wet basis). The chemical properties of samples including total phenolic and flavonoid content, functional properties, antioxidant capacity, and antibacterial properties were evaluated. The results showed that the use of ultrasound pretreatment together with pure apple vinegar had the greatest effect in the increase of bioactive compounds and antibacterial properties of samples compared with the control one. The results showed that the use of ultrasonic and pure apple vinegar improved the quality, functional, and antibacterial properties of dried sliced garlic samples.
 

Volume 21, Issue 149 (July 2024)
Abstract

The purpose of this research was to prepare nanocomposite film based on wheat gluten containing quercetin nanoliposome and zinc oxide nanoparticles and use it to package rainbow salmon; For this purpose, in this research, the effect of quercetin nanoliposome at the levels (0, 5, 10% by volume) and zinc oxide nanoparticles at the levels (0, 3, 6% by weight) using the response surface method in The central composite design template was investigated on the physicochemical properties of the nanocomposite film, and finally, the optimal sample was used in the packaging of rainbow salmon meat to check its properties during the storage period (0, 3 and 6 days). Also, the results of the research on packaged fish meat showed that the use of wheat gluten nanocomposite film containing 10% quercetin nanoliposomes and 6% zinc oxide nanoparticles led to a decrease in peroxide index, volatile nitrogen compounds index, thiobarbituric acid index and total microbial count during the storage period. Became. Also, no significant difference was observed in the fat of the examined samples, and the color of the packaged fish meat was duller than the control sample. Finally, according to the obtained results and investigations, the addition of 10% quercetin nanoliposome and 6% zinc oxide nanoparticles in the wheat gluten nanocomposite film formulation led to the improvement of the properties of the produced film and the properties of the packaged fish during the storage period.
 

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