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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: Research Journal of Pharmacognosy
- نوع مقاله: Journal Article
- کلمات کلیدی: Antioxidant,Anti-inflammatory,Anti-bacterial,Iranian Traditional Medicine,burn healing
- چکیده:
- چکیده انگلیسی: Burns are known as one of the most common forms of injury with devastating consequences. Despite the discovery of several antiseptics, burn wound healing has still remained a challenge to modern medicine. Herbal products seem to possess moderate efficacy with no or less toxicity and are less expensive compared to synthetic drugs. Burn is a well-known disorder in Iranian Traditional Medicine (ITM). Iranian physicians have divided burns into various types based on the cause and recommended treatment for each type. According to ITM references, herbal therapy was the major treatment prescribed by Iranian physicians for burns. In the present study, seven ancient Iranian medical texts were screened for the herbs with burn healing effects along with their applied dosage forms. The medicinal herbs were listed and scored based on the frequency of their repetition. Moreover, the best scientific name that was suitable for each plant as well as surveying modern studies about their biological effects has been carried out. In our investigation eighteen plants with seven topical application categories have been obtained as the most frequent herbs for burn healing in ITM. Modern studies have revealed that these plants have shown some biological activities such as anti-inflammatory, antimicrobial and antioxidant effects which might establish the relationship between the mentioned activities and burn wound healing property. This list can provide a suitable resource for future researches in the field of burn treatment.
- انتشار مقاله: 07-06-1393
- نویسندگان: Sh. Fahimi,H. Hajimehdipoor,M. Abdollahi,S.A. Mortazavi
- مشاهده
- جایگاه : پژوهشی
- مجله: Research Journal of Pharmacognosy
- نوع مقاله: Journal Article
- کلمات کلیدی: HIV,Antioxidants,Phytochemicals,mechanism of action
- چکیده:
- چکیده انگلیسی: Oxidative stress has been implicated in the progression of HIV to AIDS, since HIV usually replicates in a highly oxidized condition and CD4+ T lymphocytes can be activated via a cascade of internal oxidative pathways, which enhances the formation of proteins and enzymes. Thus, antioxidants should potentially be useful for the treatment and prevention of HIV infection as a new alternative strategy. Regarding the point that there are various approaches for treating the HIV-positive patients, antioxidant supplementation therapy alongside with other medications possesses many benefits. In fact, antioxidants and micronutrient supplements have been considered as a costly and short-term strategy to improve antioxidant deficiency. If diets come with sufficient education and scientific recommendations, they can provide a low-cost and long-term strategy to reduce oxidative stress, prevent micronutrient deficiency, and slow down HIV progression. This strategy may be applicable and beneficial particularly in countries around coast of Africa, where HIV is most common. Meantime these countries are rich of natural food resources. It seems that a healthy diet is the best way to insure proper nutrient intake, since it contains many nutrients not available in pills.
- انتشار مقاله: 01-04-1393
- نویسندگان: S. Saeidnia,M. Abdollahi
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Solar Energy Research
- نوع مقاله: Journal Article
- کلمات کلیدی: heating,Parabolic Trough Solar Collector,Organic Rankine Cycle,Power Generation,engineering faculty of Urmia University
- چکیده:
- چکیده انگلیسی: In the present paper, the energetic and exegetic analysis of using parabolic trough solar collectors (PTSC) subsystem with an organic Rankine cycle (ORC) at the engineering faculty of Urmia University that located in Nazlou regain as a case study is carried out. The task of this cycle is to provide the heating load and electrical power of the building. Firstly the energy demand of the building is calculated. Then, by considering the geographic location and weather conditions information of Nazlou, a cycle that fits with it, in three solar radiation modes is designed. These modes are the solar mode, the solar and storage mode, and the storage mode. According to results, total heating load and electrical power rate of the building are 1253.2 kW and 1500 kW, respectively. This energy demand can be provided by 250 and 500 number of PTSC in the solar mode and the solar and storage mode, respectively. PTSC outlet temperature and its efficiency during the year are between 470-660 K and 53-56%, respectively. Heating cogeneration and electrical power energy efficiencies in the first and third mode are around 95% and 15% and in the second mode are around 45% and 7.5%, respectively. Heating cogeneration, electrical power and ORC exergy efficiencies are around 18.5%, 9.5%, and 9% in the first and third mode, respectively. For second mode these values are around 9%, 4.5%, and 4%, respectively. Also, the major exergy destruction rate is occurred in the PTSC and ORC evaporator.
- انتشار مقاله: 06-03-1397
- نویسندگان: M. Abdollahi Haghghi,S.M. Pesteei,A. Chitsaz
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Mining and Environment
- نوع مقاله: Journal Article
- کلمات کلیدی:
- چکیده:
- چکیده انگلیسی: Indigenous acidophilic bacteria separated from mine-waste can be used in return for the addition of the reagents like sulfuric acid. Among the tailings bacteria, Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans are of the most-studied ones for the bioleaching and bioremediation of elements. In this work, the isolation and characterization of the mentioned bacteria are studied by a proposed biochemical protocol. The sequential cultivation of the soil bacteria in a series of liquid media and solid cult
- انتشار مقاله: 09-09-1378
- نویسندگان: Z. Piervandi,A. Khodadadi Darban,Seyed M. Mousavi,M. Abdollahi,Gh.R. Asadollahfardi,K. Akbari Noghabi
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Mining and Environment
- نوع مقاله: Journal Article
- کلمات کلیدی: Bioleaching,Chalcopyrite,Acidianus brierleyi,Initial pH,Iron oxidation,Jarosite precipitation
- چکیده:
- چکیده انگلیسی: Although bioleaching of chalcopyrite by thermophilic microorganisms enhances the rate of copper recovery, a high temperature accelerates iron precipitation as jarosite, which can bring many operational problems in the industrial processes. In this research work, the bioleaching of chalcopyrite concentrate by the thermophilic Acidianus brierleyi was studied, and the microbial growth, copper dissolution, iron oxidation, and jarosite precipitation were monitored in different initial pH (pHi) values. Bacterial growth was greatly affected by pHi. While the bacterial growth was delayed for 11 days with a pHi value of 0.8, this delay was reduced to nearly one day for a pHi value of 1.2. Two stages of copper recovery were observed during all the tests. A high pHi value caused a fast bacterial growth in the first stage and severe jarosite precipitation in the later days causing a sharp decline in the bacterial population and copper leaching rate. The copper recoveries after 11 days were 25%, 78%, 84%, 70%, 56%, and 39% for the pHi values of 0.8, 1.0, 1.2, 1.3, 1.5, and 1.7, respectively. Sulfur and jarosite were the main residues of the bioleaching tests. It was revealed that the drastic effect of jarosite precipitation on the microbial growth and copper recovery was mainly caused by the ferric iron depletion from solution rather than passivation of the chalcopyrite surface. A slow precipitation of crystalline jarosite did not cause a passive chalcopyrite surface. The mechanisms of chalcopyrite bioleaching were discussed.
- انتشار مقاله: 17-12-1398
- نویسندگان: M. R. Samadzadeh Yazdi,M. Abdollahi,S. M. Mousavi,A. Khodadadi Darban
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Mining and Environment
- نوع مقاله: Journal Article
- کلمات کلیدی: PROMETHEE Method,Dimension Stone,Sawability Ranking,Production Rate
- چکیده:
- چکیده انگلیسی: Predicting the sawability of the dimension stone is one of the most important factors involved in production planning. Moreover, this factor can be used as an important criterion in the cost estimation and planning of the stone plants. The main purpose for carrying out this work was to rank the sawability of the dimension stone using the PROMETHEE method. In this research work, four important physical and mechanical properties of rocks including the uniaxial compressive strength, Schmiazek F-abrasivity, mohs hardness, and Young's modulus were evaluated as the criteria. During the research process, two groups of dimension stones were selected and analyzed. The rock samples were collected from a number of Iranian factories for the laboratory tests. The production rate of each sawn stone was selected to verify the proposed sawability ranking method. The results obtained showed that the new ranking method can be reliably used for evaluating the sawability of the dimension stone at any stone factory with different rocks only by the physical and mechanical properties testing.
- انتشار مقاله: 27-12-1393
- نویسندگان: R. Mikaeil,M. Abdollahi Kamran,G. Sadegheslam,M. Ataei
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Food Biosciences and Technology
- نوع مقاله: Journal Article
- کلمات کلیدی: Artificial Neural Networks,Partial Least Squares,NIR Spectroscopy,Soluble Solids Content
- چکیده:
- چکیده انگلیسی: This paper reports on the use of Artificial Neural Networks (ANN) and Partial Least Square
regression (PLS) combined with NIR spectroscopy (900-1700 nm) to design calibration models for the
determination of sugar content in sugar beet. In this study a total of 80 samples were used as the calibration set,
whereas 40 samples were used for prediction. Three pre-processing methods, including Multiplicative Scatter
Correction (MSC), first and second derivatives were applied to improve the predictive ability of the models.
Models were developed using partial least squares and artificial neural networks as linear and nonlinear models,
respectively. The correlation coefficient (R), sugar mean square error of prediction (RMSEP) and SDR were the
factors used for comparing these models. The results showed that NIR can be utilized as a rapid method to
determine soluble solid content (SSC), sugar content (SC) and the model developed by ANN gives better
correlation between predictions and measured values than PLS.- انتشار مقاله: 21-04-1394
- نویسندگان: S. Minaei,H. Bagherpour,M. Abdollahian Noghabi,M.E. Khorasani Fardvani,F. Forughimanesh
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of AI and Data Mining
- نوع مقاله: Journal Article
- کلمات کلیدی: Genetic programming,Shuffled Frog Leaping Algorithm,Shuffled Frog Leaping Programming,Regression Problems
- چکیده:
- چکیده انگلیسی: There are various automatic programming models inspired by evolutionary computation techniques. Due to the importance of devising an automatic mechanism to explore the complicated search space of mathematical problems where numerical methods fails, evolutionary computations are widely studied and applied to solve real world problems. One of the famous algorithm in optimization problem is shuffled frog leaping algorithm (SFLA) which is inspired by behaviour of frogs to find the highest quantity of available food by searching their environment both locally and globally. The results of SFLA prove that it is competitively effective to solve problems. In this paper, Shuffled Frog Leaping Programming (SFLP) inspired by SFLA is proposed as a novel type of automatic programming model to solve symbolic regression problems based on tree representation. Also, in SFLP, a new mechanism for improving constant numbers in the tree structure is proposed. In this way, different domains of mathematical problems can be addressed with the use of proposed method. To find out about the performance of generated solutions by SFLP, various experiments were conducted using a number of benchmark functions. The results were also compared with other evolutionary programming algorithms like BBP, GSP, GP and many variants of GP.
- انتشار مقاله: 28-09-1397
- نویسندگان: M. Abdollahi,M. Aliyari Shoorehdeli
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Science and Technology A:Science
- نوع مقاله: Journal Article
- کلمات کلیدی: Biodiesel,Stability,Screening methods,Pseudomonas sp,Organic solvent-tolerant lipase
- چکیده:
- چکیده انگلیسی: Using enrichment procedures, 45 organic solvent-tolerant lipase producer bacterial strains were screened from areas contaminated by oil and organic solvents. Among the strains, 15 isolates exhibited extreme stability toward organic solvents and high lipolytic activity. The NEB-1 isolate which was later identified as Pseudomonas sp. strain NEB-1 by biochemical tests and 16S rDNA gene sequence analysis was selected based on extremely high tolerance to organic solvents and maximum lipase production. Biochemical studies revealed that the crude lipase was stable at temperatures between 20 ºC and 60 ºC and pH ranges of 4 to 11 for 1 h. Optimum pH and temperature of the enzyme were revealed to be 9.5 and 70 ºC, respectively. The crude lipase showed remarkable tolerance in presence of different organic solvents with a broad range of hydrophobicity characteristics. The solvent stable lipase showed an attractive potency for application in biocatalysis in non-aqueous systems and biodiesel production.
- انتشار مقاله: 26-04-1392
- نویسندگان: M. Abdollahi,H. R. Karbalaei-Heidari
- مشاهده
- جایگاه : پژوهشی
- مجله: Iran Agricultural Research
- نوع مقاله: Journal Article
- کلمات کلیدی: G. intraradices,Clover,G. mosseae,Mycorrhizal growth response,Phosphorus inflow
- چکیده: اثر قارچهای میکوریزا آربسکولار بر رشد و سرعت ورود فسفر به داخل ریشه دو گونه شبدر متفاوت در ریخت شناسی ریشه مورد مطالعه قرار گرفت. این آزمایش گلدانی به صورت فاکتوریل در قالب طرح بلوکهای کامل تصادفی شامل دو گونه شبدر (تریفولیوم الکساندرینوم و تریفولیوم پراتنس)، سه وضعیت میکوریزا (بدون حضور میکوریزا، گلوموس اینترارادیسز و گلوموس موسیه) و سه زمان برداشت گیاه (20، 40 و 60 روز بعد از کشت گیاهچه ها) در چهار تکرار به مرحله اجرا در آمد. در این مطالعه وزن ماده خشک گیاه، کلونیزاسیون ریشه و جذب فسفر بر حسب سرعت ورود آن به ریشه و پاسخ میکوریزایی آن اندازه گیری شد. نتایج نشان داد که پاسخ رشد میکوریزایی شبدر برسیم (تریفولیوم الکساندرینوم) به طور معنی داری از پاسخ رشد میکوریزایی شبدر قرمز (تریفولیوم پراتنس) بیشتر بود. این نتیجه عمدتاٌ به مجموع طول بیشتر شبدر برسیم که توانست سطح بیشتری را برای کلونیزاسیون فراهم کند نسبت داده شد. بیشترین سرعت ورود فسفر به گیاه در دوره اول برداشت گیاه (20-0 روز) مشاهده گردید. در این دوره برداشت و در تیمار شبدر برسیم (تریفولیوم الکساندرینوم)، سرعت ورود فسفر به داخل شبدر شاهد (بدون حضور میکوریزا) و شبدر کلنی شده با گلوموس موسیه و گلوموس اینترارادیسز به ترتیب برابر با 9/1، 8/6 و 01/8 پیکومول بر متر بر ثانیه بود که به ترتیب 6/3 و 2/4 مرتبه بیشتر از سرعت ورود فسفر به داخل گیاه شاهد بود. تاثیر بیشتر قارچ گلوموس اینترارادیسز در افزایش سرعت ورود فسفر ممکن است به توانایی بیشتر قارچ گلوموس اینترارادیسز در انتشار به داخل خاک و جذب بیشتر فسفر از منطقه دور تر از اطراف ریشه گیاه باشد و یا ممکن است به تراکم بیشتر آربسکول و ریسه های داخلی در واحد طول ریشه کلنی شده در مقایسه با گلوموس موسیه باشد. نتیجه گیری کلی اینکه، شبدر برسیم در مقایسه با شبدر قرمز پاسخ بیشتری به کلونیزاسیون میکوریزایی داشت و این به نوبه خود به بهبود بیشتر تغذیه فسفری شبدر برسیم کلنی شده با قارچ گلوموس اینترارادیسز منجر شد.
- چکیده انگلیسی: The effects of arbuscular mycorrhizal (AM) fungi on growth and phosphorus (P) inflow into two species of clover plant with different root morphology were studied. The experiment was arranged as a randomized complete block design consisting of a 2×3×3 factorial combination of two clover species (Trifolium alexandrinum L. and Trifolium pratense L.), three mycorrhiza states (without mycorrhiza, Glomus intraradices and Glomus mosseae) and three harvests (20, 40 and 60 days after transplanting) with 4 replications. In this experiment, plant dry matter, root colonization and P uptake in terms of P inflow and mycorrhizal P response (MPR) were determined. Results showed that mycorrhizal growth response (MGR) of T. alexandrinum was greater than that of T. pratense. This was mainly attributed to the higher root length of T. alexandrinum which provides a greater surface area for colonization compared to T. pratense. The highest P inflow was observed during the first harvest period (0-20 d). In this harvest period and during the treatment with T. alexandrinum, P inflow into non-colonized roots, roots colonized by G. mosseae and G. intraradices were 1.9, 6.8 and 8.01 pM m-1 s-1, respectively being 3.6 and 4.2 times greater than the control plants. The greater effect of G. intraradices compared to G. mosseae on increasing P inflow might be due to the superior ability of G. intraradices to spread into the soil and absorb more P beyond the P depletion zones around the roots and/or might be due to the higher intensity of arbuscules and intra-radical hyphae per unit length of colonized root. In conclusion, T. alexandrinum was more responsive to mycorrhizal colonization than T. pratense which, in turn, resulted in better P nutrition of T. alexandrinum colonized by G. intraradices.
- انتشار مقاله: 09-10-1392
- نویسندگان: H. NADIAN,G. FATHI,M. ABDOLLAHI
- مشاهده