مقاله حاضر به بررسی تاثیر استراتژی مفاهیم ذهنی (concept mapping) در نگارش انشا انگلیسی بر خود تنظیمی (self-regulation) دانشجویان کارشناسی زبان انگلیسی می پردازد. تصور بر این است که آموزش استراتژی های ذهنی می تواند سبب پیشرفت تحصیلی فراگیران در زمینه های مختلف آموزشی شود (هکر، دانلوسکی، گریسر 1998). شرکت کنندگان در این تحقیق عبارت از شصت دانشجوی (دختر و پسر) کارشناسی زبان انگلیسی گرایش مترجمی و ادبیات بوده که به دو گروه سی نفره آزمایش و کنترل تقسیم شدند. نتایج تحقیق حاصل از تجزیه و تحلیل آماری نشان داد که تدریس استراتژی مفاهیم ذهنی می تواند سبب ارتقا خود تنظیمی دانشجویان با سطح زبانی متوسط شود. یافته های این تحقیق دارای کاربردهای آموزشی، عملی و نظری در زمینه آموزش استراتژی های یادگیری به ویژه آموزش مفاهیم ذهنی در مهارت نوشتاری دانشجویان می باشد.

مقدمه: از دست دادن دندان ها و پیامدهای آن برای سلامتی، همچنین ناراحتی روانی که به همراه دارد، تاثیر منفی بر وضعیت سلامتی و کیفیت زندگی می گذارد. ایمپلنت دندان با هدف افزایش سلامت و رضایت بیماران و بهبود همه ی جنبه های کیفیت زندگی انجام می شود. لذا این مطالعه با هدف تاثیر درمان ایمپلنت بر شاخص های کیفیت مرتبط با سلامت دهان و دندان در بیماران تحت درمان ایمپلنت در شهر اصفهان انجام شد. مواد و روش ها: در این مطالعه ی تحلیلی-مقطعی، کیفیت زندگی 73 بیمار مراجعه کننده به دانشکده ی دندان پزشکی دانشگاه آزاد اسلامی واحد اصفهان (خوراسگان) و مراکز خصوصی قبل و بعد از درمان ایمپلنت، در سال تحصیلی 1398-99 با استفاده از شاخص OIDP (Oral impact on daily Performance) بررسی گردید. تجزیه و تحلیل داده ها با آزمون های Paired t-test، Independent t-test و تحلیل واریانسی (ANOVA) انجام شد (0/05 = α, ). یافته ها: در مطالعه ی حاضر، شایع ترین مشکل و بیشترین عامل موثر در شرایط دهانی بر کیفیت رضایت، کشیدن و از دست دادن دندان ها بود که بیش از همه (83/6 درصد) در کیفیت غذا خوردن، بر لذت بردن از ارتباط با دیگران (68/5 درصد) و بر کیفیت لبخند زدن (64/4 درصد) تاثیر داشت. میانگین نمره ی OIDP قبل از درمان ایمپلنت نسبت به بعد از دریافت درمان در تمام جنبه های پرسش نامه کاهش نشان داد که از نظر آماری معنی دار بود (0/05

In order to investigate the effect of inorganic selenium replacement with organic selenium from Spirulina algae on Performance and breast meat quality of broilers, a total of 160 one-day-old chicks were used in a completely randomized design with four treatments, eight replicates and five birds per each replicate. The sources of selenium used included sodium selenite and organic selenium from Spirulina algae which were replaced at two levels of 50 and 100 percent. The organic selenium was produced by the culture of Spirulina algae and its enrichment with selenium. The selenium content of different treatments was measured by ICP-Mass method. In this experiment, the feed intake and body weight gain parameters were measured weekly and feed conversion ratio was calculated. At 42 day of age, one bird was slaughtered from each replicate and the weight of carcass ready to cook was measured. The breast meat was sampled for measurement of pH and selenium storage. The results showed that it was not observed any significant difference in Performance traits and ready to cook carcass percentage among different treatments. There was no significant difference in breast muscle pH at 0 and 24 hours after slaughtering. The amount of selenium deposited in breast muscle of birds fed organic selenium had significant increase when compared with other treatments (P<0.05). Generally, the results of this study showed that 100% replacement of sodium selenite with organic selenium from Spirulina algae led to increase in breast muscle selenium deposition without reduction in bird Performance.

The study objective was to evaluate the effects of reducing dietary starch content in fresh cow diets while maintaining NDF levels by substituting barley grain (BG), corn silage (CS), or both with beet pulp (BP) on DMI, lactation Performance, serum mineral and metabolites concentrations, liver enzymes and liver functionality index (LFI), serum insulin and revised quantitative insulin sensitivity check index (RQUICKI). Thirty-six multiparous cows were randomly assigned to 1 of 4 experimental diets from calving to 21 days in lactation. Experimental diets were a high-starch diet with ground BG (CO; 24.9% starch; 0% BP) and 3 low-starch diets where BP substituted for either BG (BB; 19.6% starch; 7% BP), CS (BC; 20.6% starch; 12% BP) or CS and BG (BCB; 20.3% starch; 12% BP). Relative to CO cows (16.50 kg/d), DMI was greater for BC (17.70 kg/d) and BCB (17.50 kg/d) cows, but it was lesser in BB (15.60 kg/d) cows. Similar to DMI results, milk yields tended to be greater for BC (37.89 kg/d) and BCB cows (37.81 kg/d) compared to CO cows (35.41 kg/d), but BB cows (33.05 kg/d) tended to produce less milk than CO cows. Relative to CO, cows fed BB had lower serum glucose concentrations, whereas cows fed BC and BCB had higher serum glucose. Serum insulin concentrations were lower for BB cows than for other exprimental groups. Relative to CO, serum NEFA and BHB concentrations were lower for BC and BCB, but was similar between BB and CO. The RQUICKI was lower for CO, BC cows than BB cows, and cows in BCB tended to have less RQUICKI compared to BB during postpartum. The concentrations of gamma glutamyl transferase were lower in BC and BCB cows relative to CO and BB cows. The cows fed CO and BB had higher serum bilirubin relative to cows fed BC and BCB diets. Although, LFI for CO cows was similar to cows on BB, BC and BCB, BC cows had higher LFI than BB cows and tended to have greater LFI than CO cows. Overall, reducing dietary starch by replacing CS (BC) or a mix of CS and BG (BCB) with BP positively affected DMI and milk yield and indicated improved energy metabolism and liver function during the first 21 d of lactation compared to when BP was fed instead of BG to reduce starch (BB).