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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: Journal of Physical Activity and Hormones
- نوع مقاله: Journal Article
- کلمات کلیدی: Insulin resistance,Pregnancy,Insulin sensitivity,Gestational diabetes
- چکیده:
- چکیده انگلیسی: Introduction: The purpose of this study was to comparison the effects of aqua and resistance training on insulin resistance and homeostasis model assessment of β-Cell function in women with gestational diabetes mellitus.
Material & Methods: For this purpose, 34 women with gestational diabetes voluntarily participated which were selected from the available sampling pool. The subjects were simple random assigned in three groups. 12 subjects participated in an aqua aerobic training group (3 days/week, 30-45 min/day, 50-70% maximum heart rate) and 11 subjects participated in an aqua resistance training group (3 days/week, 2-3 set of 15 repetition, 50-70%maximum heart rate), and 11 subjects were in control group who did not participate in any exercise program during the study period.
Results: The results indicated that HOMA-β increased and fasting glucose decreased in the aqua resistance training (P<0.05), however no significant differences were observed between three groups. For fasting insulin and insulin resistance no significant differences observed after the intervention.
Conclusions: It seems likely that aqua resistance training is more effective in comparison to aqua aerobic training in improving diabetes risk factors in women with gestational diabetes.- انتشار مقاله: 24-03-1396
- نویسندگان: Nasibeh Kazemi,Seyed Ali Hosseini
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Ornamental Plants
- نوع مقاله: Journal Article
- کلمات کلیدی: root dry weight,Shoot dry weight,Leaf number,Length of petiole
- چکیده: به منظورمطالعه بسترهای مختلف کشت و کود ازته با منشا اوره بر برخی صفات مورفولوژیکی گیاه زینتی اسپاتی فیلوم، آزمایشی بهصورت طرح کرتهای خرد شده بر پایه طرح بلوکهای کامل تصادفی در سه تکرار و در شرایط گلخانه در سال 1397 اجرا شد. پلات اصلی شامل محیط کشتهای خاک برگ، ورمیکمپوست و یک محیط رشد مخلوط (مرکب از 20 درصد پیت موس، 50 درصد کوکوپیت و 30 درصد پرلیت) بود و پلات فرعی نیز مقادیر مختلف کود اوره (شامل 0، 1، 2، 3 و 4 گرم در لیتر) بود. نتایج نشان داد که محیط رشد مخلوط به علاوه دو گرم در لیتر کود اوره، اثر مثبت معنیداری بر تمام صفات دارد. با توجه به نتایج اثرات برهمکنش، بیشترین وزن تر ساقه (5/26 گرم در هر بوته)، وزن خشک ساقه (75/3 گرم در هر بوته)، وزن تر ریشه (5/35 گرم در هر بوته)، وزن خشک ریشه (87/4 گرم در هر بوته)، طول دمبرگ (1/55 سانتیمتر) و تعداد برگ (1/12) از محیط رشد مخلوط به علاوه دو گرم در لیتر کود اوره حاصل شد در حالی که مقدار این صفات در تمام محیطهای رشد بدون کود اوره، حداقل بود. افزایش کود اوره از صفر به دو گرم در لیتر، باعث افزایش وزن خشک ساقه و طول دمبرگ شد در حالی که استفاده از سه و چهار گرم در لیتر کود اوره، مقدار این صفات را کاهش داد. محیطهای رشد با هدایت الکتریکی دو دسی زیمنس در متر، تخلخل بالا و ظرفیت نگهداری بالای آب میتواند اثرات قابل ملاحظهای بر بهبود صفات موفولوژیکی گیاه اسپاتیفیلوم داشته باشد.
- چکیده انگلیسی: In order to evaluate different growing media and nitrogen fertilizer (urea) on some morphological traits of Spathiphyllum, an experiment was carried out in a split-plot arrangement based on a completely randomized block design in three replications in greenhouse conditions in 2018. The main plot was assigned to different growing media including T1: leaf-mold, T2: vermicompost, and T3: a mixed growing medium (peat moss 20% + cocopeat 50% + perlite 30%) and the subplot was assigned to urea fertilizer at different rates of 0, 1, 2, 3 and 4 g/L. Results showed that the mixed growing medium plus 2 g/L urea fertilizer had significant positive effects on all traits. According to the results for the interaction effects, the highest shoot fresh weight (26.5 g/plant), shoot dry weight (3.75 g/plant), root fresh weight (35.5 g/plant), root dry weight (4.87 g/plant), length petiole (55.1 cm), and leaf number (12.1) were obtained from the mixed growing medium plus 2 g/L urea fertilizer, while the traits were the least in all studied growing media plus 0 g/L urea fertilizer. The increase in the urea fertilizer from 0 to 2 g/L increased shoot dry weight and petiole length while the urea fertilizer at the rates of 3 and 4 g/L decreased them. The growing media with an EC of 2 dS/m, high porosity, and high water holding capacity can have significant effects on improving morphologic traits of Spathiphyllum plants.
- انتشار مقاله: 04-06-1398
- نویسندگان: Seyyed Fazel Fazeli Kakhki,Ali Reza Sharifian,Nasser Beikzadeh
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Ornamental Plants
- نوع مقاله: Journal Article
- کلمات کلیدی: Humic acid,Chlorophyll,Chlorosis,Chelate,Nanofertilizer
- چکیده: اخیراً کاربرد نانو ذرات (NPS) سوپرپارامغناطیسی اکسید آهن مگنتیت (SPIONS) بهعنوان منبع نوین و امیدبخش آهن در کشاورزی مطرح شده است که قبل از استفاده گسترده میدانی، نیازمند بررسی بیشتر میباشد. در آزمایشی گلخانهای تاثیر نانو ذرات مگنتیت پوششدار شده با اسید هیومیک (Fe3O4/HA NPs) بر کاهش کلروز ناشی از کمبود آهن و کارآیی فتوسنتز در مقایسه با کلاتهای آهن Fe-EDTA(Fe-Ethylenediaminetetra acetic acid) وFe-EDDHA[Fe-Ethylenediamine di(O-hydroxyphenyl acetate)] بهعنوان تیمارهای شاهد در گل داوودی (Chrysanthemum morifolium) شاخه بریده تحت شرایط کشت هیدروپونیک بررسی شد. امکان جذب و انتقال نانو ذرات در گیاه توسط آزمایش مغناطیس سنجی ارزیابی شد. نتایج ردیابی Fe3O4/HA NPs بهوسیله مغناطیسسنجی نشاندهنده ورود نانوذرات به ریشه و انتقال به اندام هوایی داوودی بود. آزمایش گلخانهای نشان داد ۲۰ میلیگرم در لیتر Fe3O4/HA NPs در محلول غذایی موجب افزایش معنیدار میزان کلروفیلهای a،b ، کل وکاروتنوئیدها در برگ نسبت به تیمار Fe-EDTA بهترتیب به میزان 80/14، 15/12، 90/13 و 98/13 درصد شد ولی با تیمار شاهد Fe-EDDHA تفاوت معنیدار نداشت. نسبت متعادل کلروفیل a/b در همه غلظتهای نانوذرات با تیمارهای Fe-EDTA و Fe-EDDHA بهعنوان منابع مرسوم آهن در محیط رشد، بیانگر عدم تفاوت معنیدار بر کارایی فتوسنتز بود. بهطورکلی Fe3O4/HA NPs به اندام هوایی گیاه منتقل و باعث افزایش انواع رنگیزههای فتوسنتزی و رفع کلروز آهن شد.
- چکیده انگلیسی: Recently, the use of superparamagnetic iron oxide nanoparticles (SPIONS) as a new and promising source of iron in agriculture has been suggested that further investigation is needed before extensive field use. In a greenhouse experiment, the effect of coated magnetite nanoparticles with humic acid (Fe3O4/HA NPs) was investigated on iron deficiency chlorosis and photosynthesis efficiency compared to iron chelates of Fe-EDTA (Fe-Ethylenediaminetetraacetic acid) and Fe-EDDHA [Fe-Ethylene diamine-di (o-hydroxyphenylacetic acid)] as control treatments in chrysanthemum cut flower (Chrysanthemum morifolium) in the open hydroponic cultivation system. The feasibility of absorption and translocation of nanoparticles in the plant was evaluated by vibrating sample magnetometry (VSM). The results of tracing by magnetization measurement was demonstrated that NPs penetrated in root and transferred to the aerial parts of chrysanthemum. The greenhouse experiment demonstrated that the application 20 mg/L Fe3O4/HA NPs in nutrient solution significantly (P
- انتشار مقاله: 09-11-1397
- نویسندگان: Seyed Mohammad Banijamali,Mohammad Feizian,Afsaneh Alinejadian Bidabadi,Ebrahim Mehdipour
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Ornamental Plants
- نوع مقاله: Journal Article
- کلمات کلیدی: Humic acid,Chlorophyll,Iron oxide,Iron chelate,Fe3O4/HA
- چکیده: علیرغم تولید روزافزون نانوذرات(NPS) و کاربرد آنها در کشاورزی، بررسیهای محدودی در خصوص تاثیر این مواد بر رشد گیاهان انجام گرفته است. بدینمنظور، این پژوهش در شرایط آزمایشگاهی و گلخانهای به اجرا گذاشته شد. ابتدا سنتز نانوذرات سوپرپارامغناطیسی اکسید آهن مگنتیت (SPIONS) با پوشش اسید هیومیک (Fe3O4/HA) در شرایط آزمایشگاهی به روش همرسوبی انجام شد. آزمون اثر بخشی نانو ذرات سنتز شده بر رشد رویشی و جذب عناصر غذایی داوودی Chrysanthemum morifolium) ) شاخه بریده در شرایط گلخانهای در قالب طرح کاملا تصادفی در چهار تکرار مورد ارزیابی قرار گرفت. تیمارها شامل غلظتهای 10، 20 و 40 میلیگرم بر لیتر آهن خالص از منبع Fe3O4/HA NPS و همچنین غلظت 4/1 میلیگرم بر لیتر آهن خالص از دو منبع کلات آهن ( Fe-EDTAوFe-EDDHA) بهعنوان تیمارهای شاهد در سیستم کشت هیدروپونیک باز در نظر گرفته شد. نتایج آزمایشگاهی نشان داد سنتز نانوذرات مگنتیت با پوشش اسید هیومیک بهروش همرسوبی منتج به تولید نانوذراتی با قطر میانگین 38/8 نانومتر و با ویژگی مواد سوپرپارامغناطیس شد. آزمایش گلخانهای مشخص کرد کاربرد Fe3O4/HA موجب افزایش معنیدار جذب کل آهن، کلروفیل و رشد رویشی گیاهان نسبت به تیمارهای شاهد شد. بیشترین مقدار جذب کل آهن، نیتروژن، فسفر، پتاسیم، کلسیم، منیزیم، منگنز و بور در غلظت ۲۰ میلیگرم در لیتر نانوذرات مشاهده شد. تعداد شاخه در بوته، ارتفاع شاخه و وزن خشک کل بوته بهترتیب 25، 38 و 5/39 درصد در تیمارFe-EDTA و50، 36 و 48 درصد در تیمار Fe-EDDHA افزایش معنیدار یافت. نتایج این بررسی نشان داد نانو ذرات مگنتیت با پوشش اسید هیومیک موجب رفع کمبود آهن و افزایش رشد داوودی شد.
- چکیده انگلیسی: Despite the increasing rate of nanoparticles (NPS) production and their application in agriculture, few studies have focused on their effect on plant growth. So, the present research was conducted in laboratory and greenhouse conditions. First, superparamagnetic iron oxide nanoparticles (SPIONS) with a humic acid coating (Fe3O4/HA) were synthesized in laboratory conditions by the chemical coprecipitation method. The effectiveness of the synthesized nanoparticles in vegetative growth and nutrients uptake of chrysanthemum cut flower (Chrysanthemum morifolium) were evaluated in greenhouse conditions with four replications in a completely randomized design. The treatments consisted of 10, 20 and 40 mg/L of pure Fe from the source of Fe3O4/HA NPS and 1.4 mg/L of pure Fe from two sources of iron chelates which contained Fe-EDTA(Fe-Ethylenediaminetetraaceticacid) and Fe-EDDHA [Fe-ethylenediaminedi(O-hydroxy phenylaceticacid)] were considered as control treatments in the open hydroponic cultivation system. The results of the laboratory experiment indicated that the synthesis of Fe3O4/HA by the chemical coprecipitation method led to the production of nanoparticles with an average diameter of 8.38 nm and superparamagnetic properties. The greenhouse experiment demonstrated that the application of Fe3O4/HA significantly increased Fe uptake, chlorophyll and vegetative growth of the plants versus the control treatments. The highest rates of Fe, N, P, K, Ca, Mg, Mn, and B uptake were observed at the NP rate of 20 mg/L. The branch number per plant, stem height, and total dry weight of the plants were significantly increased by 25, 38, and 39.5% versus the treatment of Fe-EDTA and by 50, 36, and 48% versus the treatment of Fe-EDDHA, respectively. It is concluded that magnetite NPs with a humic acid coating resolved Fe deficiency and increased chrysanthemum growth.
- انتشار مقاله: 22-09-1397
- نویسندگان: Seyed Mohammad Banijamali,Mohammad Feizian,Afsaneh Alinejadian Bidabadi,Ebrahim Mehdipour
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Oral Health and Oral Epidemiology
- نوع مقاله: Journal Article
- کلمات کلیدی: anxiety,Pain,Dentistry,injection
- چکیده:
- چکیده انگلیسی: BACKGROUND AND AIM: Pain control is an important part of pediatric dentistry. The purpose of this study was to evaluate pain and behavioral reaction who receive an injection with conventional and telescopic dental needles.METHODS: A total of 50 healthy children aged 4-8 years were included to this study to get a dental injection with the telescopic or the conventional dental needles. Two observers scored videos of children at the time of injection procedures based on sound, eye, motor (SEM) scale and distress reaction to evaluate the observed pain-related behavior. Children completed a face version of visual analog scale (VAS) after injection. Reliability of observer’s opinion evaluated and was established at 96%. Independent t-test and chi-square tests were used for statistical analysis. Statistical significance was defined at P < 0.0500.RESULTS: This study was conducted among 23 girls and 27 boys with mean age 5.3 ± 1.4. The pain scores according to VAS for the telescopic, and the conventional dental needles were 40.20 ± 10.50 and 56.40 ± 14.63, respectively, which was statistically significant between the two groups (P = 0.0001). The difference of SEM values for the telescopic and the conventional groups were statistically significant in totals as well as individual parameters (P = 0.0001). According to mean distress scores, patients showed less muscle tension, less verbal protest and less movement when receiving the telescopic needles (P < 0.0500).CONCLUSION: Telescopic dental needles with the ability of using topical anesthesia before needle insertion and covering needle sight out of patient’s eyes may be a good intervention to reduce pain and anxiety of children during dental injection.
- انتشار مقاله: 25-10-1395
- نویسندگان: Raha Habib-Agahi,Seyyed Abdolreza Gandjalikhan-Nassab,Maryam Alsadat Hashemipour,Alireza Saidi,Ali Eskandarizadeh
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Oral Health and Oral Epidemiology
- نوع مقاله: Journal Article
- کلمات کلیدی: attitude,Knowledge,Dentistry,Human Immunodeficiency Virus (HIV)
- چکیده:
- چکیده انگلیسی: BACKGROUND AND AIM: Human immunodeficiency virus (HIV) can cause a hazardous disease and has severe fatal consequences. The problem of dental treatment in affected patients has still remained a big debate. The objective of this study was to evaluate the knowledge and attitude of post-graduate dentistry students regarding treatment and education of HIV-positive patients.METHODS: This was a cross-sectional descriptive study on the post-graduate students of dentistry in Iran. Samples were collected using consensus method. A valid questionnaire comprising three parts was designed according to previous studies. The questionnaire comprised of a demographic part, general questions and questions regarding knowledge and attitude of the subjects. Answers were collected and Student’s t-test and Fischer’s exact test was used to analyze the data.RESULTS: A total of 380 subjects took part in this study (164 male, 216 female). There were 92 HIV-positive patients. The average score of knowledge was 14.5 ± 2.8 (range = 0-24). The average score of knowledge in male and female participants was 14.5 ± 2.8 and 14.6 ± 2.7 respectively (range = 0-65). There was no significant relationship between knowledge and gender (P = 0.70). The average score of attitude was 44.8 ± 5.25 and male residents had a positive attitude in comparison to female residents. Male participants had a significantly more negative attitude toward high risk and HIV-positive patients compared to female residents (P = 0.04).CONCLUSION: The results of this study showed that post-graduate students had a positive attitude toward treatment of HIV-positive patients. Also, this study showed that post-graduate students had a good knowledge about the HIV-positive patients. This study shows that post-graduate students of dentistry were eager to learn more about the treatment of HIV-positive patients. Findings of this study also add new concepts to the oral hygiene maintenance of HIV-positive patients and decision making for them.
- انتشار مقاله: 19-04-1395
- نویسندگان: Maryam Alsadat Hashemipour,Mohsen Shahi,Azin Mirzadeh,Sayed Amir Hossien Gandjalikhan-Nassab
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Optoelectronical Nanostructures
- نوع مقاله: Journal Article
- کلمات کلیدی: Comparator,photonic crystal,Kerr Effect,Optical Devices
- چکیده:
- چکیده انگلیسی: In this paper, a photonic crystal structure for comparing two bits has been
proposed. This structure includes four resonant rings and some nonlinear rods. The
nonlinear rods used inside the resonant rings were made of a doped glass whose linear
and nonlinear refractive indices are 1.4 and 10-14 m2/W, respectively. Using Kerr effect,
optical waves are guided toward the correct output ports. In this study, plane wave
expansion and finite difference time domain methods were used for calculation of
photonic bandgap and simulation of optical wave propagation, respectively. The size of
the proposed structure is 1585 μm2 which is more compact than the previous works.
Furthermore, the obtained maximum delay time is about 2 ps that is proper to highspeed
processing. The normalized output power margins for logic 0 and 1 are calculated
as 25% and 71%, respectively. According to the obtained results, this structure can be
used for optical integrated circuits.- انتشار مقاله: 26-11-1397
- نویسندگان: Seyyed Mohammad Hosein Jalali,Mohammad Soroosh,Gholamreza Akbarizadeh
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering
- نوع مقاله: Journal Article
- کلمات کلیدی: Powder Metallurgy,Nano Composites,static compression pressure,titanium and silicon carbide reinforcing
- چکیده:
- چکیده انگلیسی: Building the Nano composites for getting material with combinational properties and improving properties of currently used material has been taken significant attention. One of the ways of building Nano composites is using a method known as powder metallurgy. Because with this method not only wastes are decreased to minimum but we can also mix the materials with high melting point with the materials with low melting point which is a difficult thing to do with foundry method. In this research titanium alloy for improvement in its mechanical properties is mixed with silicon carbide reinforcing. Knowing the fact that silicon carbide is in Nano scale these two materials start building Nano composites. The powder metallurgy method is the best way for mixing these two materials together. To make sure that the properties of the made alloy is similar to the foundry alloy, the static compression methods are used. For comparison the results, two factors such as the Nano silicon carbide percentage and the static compression pressure are. Also, Density experiment, observation of grain boundaries using a scanning electron microscope, pressure test and the hardness experiment was done on it.
- انتشار مقاله: 28-09-1394
- نویسندگان: SEYED MEHRAN ZOHALI,Farzad Fariba
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering
- نوع مقاله: Journal Article
- کلمات کلیدی: Stress distribution,stress intensity factor,Concentrate load,Edge crack
- چکیده:
- چکیده انگلیسی: The stress distribution on the tip of the cracks and the stress intensity factor on them are the main courses in the fracture mechanic. The stress intensity factor of the cracks with the different load exited and the different geometry are listed in the tables of the standard books. In all of them, the cracks are located in the central point of the plates. In the uniform edge loaded case, the crack position is not effect on the stress intensity factor of the crack but in the case that the load is concentrated the stress distribution different from point to another point and therefore the stress intensity factor of the crack, is changed with the crack displacement from the point of the exited load. In this paper, the stress intensity factor changes with the distance of it from the edge of the semi-infinite plate with the edge crack is investigated. A new relation is introduced from the simulation solution with the Abaqus. Then, similar relation from analytical solution from the theory of the linear fracture mechanic was proposed. This relation was determined from the stress distribution calculation in the plate with the pointed load with the analytical solution from the elasticity theory. This two relations were compared with another and finally the more accurate relation was introduced as the relation of the stress intensity factor with the distance from the edge of the plate.
- انتشار مقاله: 20-08-1394
- نویسندگان: Farzad Fariba,Seyed Mehran Zohali
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Rehabilitation in Civil Engineering
- نوع مقاله: Journal Article
- کلمات کلیدی: Damage detection,Mode Shape,Limited sensors,Neumann series expansion
- چکیده:
- چکیده انگلیسی: In this paper, a new method proposed for structural damage detection from limited number of sensors using extreme learning machine (ELM). One of the main challenges in structural damage identification problems is the limitation in the number of used sensors. To address this issue, an effective model reduction method has been proposed. To condense mass and stiffness matrices, the second-order approximation of Neumann series expansion (NSEMR-II) has been used. Mode shapes and frequencies of damaged structures and corresponding generated damage states used as input and output to train extreme learning machine, respectively. To show the effectiveness of presented method, three different examples consists of a truss structure, irregular frame and shear frame have been studied. The obtained results show the ability of the proposed approach in identifying and estimating different damage cases using limited numbers of installed sensors and noisy modal data.
- انتشار مقاله: 19-09-1396
- نویسندگان: Seyed Sina Kourehli,Seyed Sina Kourehli,Seyed Sina Kourehli,Seyed Sina Kourehli
- مشاهده