Search

به‌منظور بررسی اثر محلول‌پاشی عناصر ریزمغذی و اسید سالیسیلیک به‌منظور بهبود برخی صفات کیفی و عملکرد کلزا تحت تنش کم‌آبی، آزمایشی به‌صورت اسپلیت‌پلات فاکتوریل در قالب طرح آماری بلوک‌های کامل تصادفی با سه تکرار در سال زراعی (1397-1396) در دانشکده کشاورزی دانشگاه لرستان اجرا شد. آبیاری در دو سطح (آبیاری در 80 درصد FC و آبیاری در 30 درصد FC) در کرت‌های اصلی و ترکیب عناصر ریزمغذی آهن، روی و منگنز در دو سطح (عدم مصرف و محلول‌پاشی با نسبت 2 در هزار) و عامل اسید سالیسیلیک در چهار سطح (صفر، 0.5، ۱ و 1.5 میلی‌مولار) در کرت‌های فرعی مورد مقایسه قرار گرفت. نتایج مقایسه میانگین داده‌ها نشان داد بیش‌ترین کلروفیل کل (2.23 میلی مول بر مترمربع بر ثانیه)، سرعت تعرق (3.12 میلی مول بر مترمربع بر ثانیه)، عملکرد دانه (4955.7 کیلوگرم در هکتار) و درصد روغن45.7) از ترکیب (عدم تنش کم‌آبی، محلول‌پاشی یک میلی‌مولار اسید سالیسیلیک و غلظت دو در هزار کود ریزمغذی حاصل شد. در شرایط تنش کم‌آبی کاربرد هم‌زمان کود ریزمغذی و اسید سالیسیلیک با غلظت یک ‌و ‌نیم میلی‌مولار موجب افزایش معنی‌دار کلروفیل کل (34 درصد)، کارتنوئید (29 درصد) سرعت فتوسنتز (27 درصد) و عملکرد دانه (36 درصد) نسبت به تیمار شاهد (بدون کاربرد کود ریزمغذی و اسید سالیسیلیک) شد. لذا استفاده از کود ریزمغذی (آهن+ روی+ منگنز) با غلظت دو در هزار به همراه غلظت یک و نیم میلی‌مولار اسید سالیسیلیک جهت کاهش اثرات سوء تنش کم‌آبی و حصول عملکرد مناسب توصیه می‌شود.

در تحقیق حاضر، اثرات میدان‌ مغناطیسی و پاشش الکتریکی بر جهت‌گیری نانولوله‌های‌کربنی پایدارشده با عامل‌ سطحی کربوکسیل در زمینه جاذب آلژینات-نانولوله‌های‌کربنی و هچنین بر جذب متیلن‌بلو مورد بررسی قرار گرفت. ویژگی‌های جاذب و عملکرد آن‌ها با استفاده از میکروسکوپ الکترونی روبشی نشر میدانی و طیف‌سنج مرئی- فرابنفش بررسی شدند. تصاویر میکروسکوپی نشان داد که به واسطه دو ساعت قرارگرفتن کلوئید آلژینات-نانولوله‌های کربنی در میدان مغناطیسی، با متوسط قدرت 318 میلی‌تسلا، نانولوله‌ها به‌طور قابل توجهی در زمینه پلیمری جهت‌گیری پیدا کردند. این در حالی است که پاشش قطرات کلوئیدی تحت میدان الکتریکی تأثیر ناچیزی در همراستا‌سازی آن‌ها داشته و اساساً منجر به ریزسازی قطرات و افزایش نسبت سطح به حجم ذرات شده است. با تلفیق میدان‌های مغناطیسی و الکتریکی در حضور نانولوله‌ها، به میزان 92/2 درصد جذب متیلن‌بلو، در مقایسه با حالت صرفا پاشش الکتریکی (71 درصد) و صرفاً پاشش الکتریکی بدون حضور نانولوله‌ها (59 درصد) به‌دست آمد. این تحقیق نشان داد که جهت‌گیری نانولوله‌های کربنی تحت میدان‌های مغناطیسی و الکتریکی در افزایش راندمان جذب آلاینده‌های زیست محیطی مؤثر بوده و می‌تواند منجر به تولید جاذب‌های اقتصادی‌تر شود.

Revocation is one of the important legal institutions that beside institutions like right of option, and right to rescind allow people that by means of that cancel their previous actions and revoke of them. Revocation has an important role in adopting legal relationships of people in the society but in spite of this in the legal system of Iran no more attention is paid to it and the nature of it partially unknown and this matter cause an important question in this ground like that: what is the legal nature of legal institution of revocation? What is difference of revocation with other legal institutions such as right of option in the binding contract, and right to rescind in the revocable contract, cancellation (Eqaleh) and annulment (Enfesakh)? Is revocation a legal right (haq) and whetherit is relinquishable and transferableor it’s a legal ruling (hokm) and unrelinguishable and untransferable? There is a disagreement between Foqaha and law makers About the nature and the effects of revocation .but what we achieved in this matter by study and analysis from the religious and legal sources is that in the perspective of legal nature Revocation is a juridical act and application and execution of it accomplish by the intention of revocation and revocation is one of the main evidences of unilateral act (Ighah) and materialized by an attention. Revocation has specific characterictis that mak it different from other legal institutions such as the right to option in the binding contract, right to rescind in the revocable contract, cancellation (Eqaleh) and annulment (Enfesakh). In addition itseems that revocation belongs to the legal rights (haq) that is relinquishable but untransferable.

Introduction: canola (Brassica napus L.) is one of the most important oilseed plants that has been ranked third in the oil production after soybeans and oil palm. Drought is seriously the most important factor limiting the growth and production of canola in Iran. By foliar application of micronutrients, plant growth condition can be improved under stress. Salicylic acid (SA) plays an important role in abiotic stress tolerance, and more interests have been focused on SA due to its ability to induce a protective effect on plants under adverse environmental conditions. It is necessary to know the traits related to drought tolerance and their relationship with Seed yield. Due to the important role of roots in the absorption and conduction of water and nutrients, accurate knowledge of the root system and how it is distributed in the soil is of particular importance. therefore, the purpose of the present study was to investigate the Effect of foliar application of micronutrients and salicylic acid to improve some quality traits and yield of canola (Brassica napus L.) under water deficit stress. Materials and methods: the experiment was conducted as split factorial in a randomized complete block design with three replications at Lorestan University College of Agriculture, Iran during 2017-2018. Water deficit was considered as the main factor in levels irrigation at 80 (control) and 30% of field capacity, and in the subplots subtractive treatment of the two factors of foliar application of micronutrient elements (nonconsumption and spraying at a concentration of 0.2%) and salicylic acid concentration of 0, 0.5, 1 and 1.5 mM). The time of water deficit stress coincided with the stage of the beginning of regrowth (BBCH32). foliar application of micronutrient fertilizer in rosette stage (BBCH29) and foliar application of salicylic acid in two stage of flowering beginning (BBCH60) and pod filling (BBCH72). the measured traits included Chlorophyll Total, Carotenoids, Photosynthesis rate, Transpiration rate, seed yield, oil percentage, and Protein percentage. the data was analyzed by statistical analysis system (SAS version: 9.1). the means were analyzed using the Duncan test at P=0.05. Results and discussion: The results of analysis of variance showed that the triple interaction of stress in micronutrient fertilizer and salicylic acid on all traits studied in this experiment were significant. The results of comparing the mean of the data showed that water deficit stress significantly reduced total chlorophyll (14%), carotenoids (21%), photosynthesis rate (19%), transpiration rate (53%), grain yield (27%), oil percentage (11%) and significantly increased protein content Seeds (22%). the combination (no stress + 1.5 mM salicylic acid spraying and concentration of 2 per thousand fertilizers Micronutrients) was obtained. produced the highest total chlorophyll (2.23 mg g-1 wet weight), transpiration rate (3.12 mmol H2O2 m-2 s-1), seed yield (4955.7 kg ha-1) and oil percentage (45.7). foliar application of micronutrient fertilizer and 1.5 mM of salicylic acid significantly increased total chlorophyll (34%), carotenoids (29%), photosynthesis rate (27%) and Seed yield (36%) compared to the control treatment (without application of micronutrient fertilizer and Salicylic acid). Conclusion: A triple micronutrient fertilizer (iron+zinc+ manganese) with a concentration of 0.2% is recommended along with a concentration of 1.5 mM of salicylic acid to reduce the negative effects of water deficit stress and achieving acceptable seed yield. [ABSTRACT FROM AUTHOR]

Background & Aim: The COVID-19 survivors are prone to psychological distress due to their experience of illness and severe conditions. Diseases can also affect patients’ quality of life. The aim of this study was to determine the relationship between mental health and quality of life among the COVID-19 survivors one year after the infection. Methods & Materials: This is a descriptive, correlational, cross-sectional study that was conducted from February, 2020 to July 2020. A total of 276 patients who survived from COVID-19 were included to the study through the convenience sampling method. Data were collected using a demographic and clinical information form, the 12-item general health questionnaire (GHQ-12) and the 36 item short form survey (SF-36). Data analysis was performed through the SPSS software version 16 using independent t-test, Pearson correlation coefficient, analysis of variance (ANOVA) and linear regression. Results: The mean score of mental health and total score of quality of life were 6.26±2.75 and 59.2±18.30, respectively. There is a significant relationship between the score of mental health and the score of quality of life (P<0.001), so that with the increase of the mental health score, which indicated the worsening of the mental health status of the participants, their quality of life score decreased. Conclusion: Paying attention to the mental health and quality of life of the survivors of COVID-19, as well as adopting supportive strategies for them are recommended. Providing psychological and psychiatric services can improve their mental health and quality of life. [ABSTRACT FROM AUTHOR]