Response of S.C.704 maize hybrid seed production to planting pattern

In order to determine the best planting pattern for producing the S.C.704 hybrid seed of maize, a field experiment was conducted in 2007 at Safiabad Dezful Research Center via a complete block design with four treatments and replicates each. The treatments were: D1 (one row each of paternal and maternal lines), D2 (two rows of paternal line and one row of maternal line), D3 (two rows each of paternal and maternal lines) and D4 (one row of paternal line and two rows of maternal line). The result indicates that planting pattern has a significant effect on most of the characteristics of corn studied. Ear weight, seed weight on ear (maximum 97 g), ear weight ratio, seed weight, cob weight ratio (maximum 66%) and grain yield increased with differences from one row planting pattern to two row planting pattern. So, varying the planting pattern from one-row pattern to two-row pattern increased some of the characteristics, though there were no significant differences between one and two-row planting patterns. The fourth treatment (one row of paternal line and two rows of maternal line planting pattern) was the best on grain yield (2,753 kg/ha).Keywords: Planting pattern, seed produce, corn grain, S.C.704 hybri

Amorphous metal cores in medium frequency power transformer

Theoretical designs have been carried out which demonstratethe possible weight and volume reductions to be obtained whenusing amorphous metal in place of silicon-iron for the corematerial in medium frequency power transformers. The amorphousmetal provides such savings by its ability to operate at highflux densities without excessive core losses. The reduced coresize also benefits the winding size, the overall reduction inweight and volume is particularly appropriate for rail and airborne power supply equipment. Of the various amorphous metalalloys available in ribbon form, two were selected for evaluationfor the frequency band 50 to 3000 Hz. Several cores were builtsuitable for use in a3 kHz 20 kVA transformer using purposebuilt core winding facilities. The wound cores, after annealing,were subjected to a comprehensive series of tests using bothsinusoidal and square wave supply voltages. The thesis containsa valuable analysis of the results obtained and related to themagnetic properties of amorphous metal. The effect of mechanicalstresses has also been investigated. The wound amorphous ribboncores were found to be slightly flexible and prone to flaking,as a consequence several methods of core protection wereinvestigated. Temperature rise tests have been conducted on thecompleted cores and various methods of heat dissipation tried.The research has shown the viability of the use of amorphousmetal for the cores of medium frequency power transformers

Response of S.C.704 maize hybrid seed production to planting pattern

In order to determine the best planting pattern for producing the S.C.704 hybrid seed of maize, a field experiment was conducted in 2007 at Safiabad Dezful Research Center via a complete block design with four treatments and replicates each. The treatments were: D1 (one row each of paternal and maternal lines), D2 (two rows of paternal line and one row of maternal line), D3 (two rows each of paternal and maternal lines) and D4 (one row of paternal line and two rows of maternal line). The result indicates that planting pattern has a significant effect on most of the characteristics of corn studied. Ear weight, seed weight on ear (maximum 97 g), ear weight ratio, seed weight, cob weight ratio (maximum 66%) and grain yield increased with differences from one row planting pattern to two row planting pattern. So, varying the planting pattern from one-row pattern to two-row pattern increased some of the characteristics, though there were no significant differences between one and two-row planting patterns. The fourth treatment (one row of paternal line and two rows of maternal line planting pattern) was the best on grain yield (2,753 kg/ha)

Leaf epidermal micromorphology of the genus Hypericum (hypericaceae) from Iran

Foliar micromorphological characters of 17 species of Hypericum L. belonging to five sections, Androsaemum (Duhamel) Godron, Hypericum, Hirtella Stef. (including 2 subsections: Platyadenum N. Robson et Stenadenum N. Robson), Taeniocarpum Jaub. et Spach. and Drosanthe (Spach) Endl. were examined using scanning electron microscopy (SEM). Based on the current result three types of epidermal cell shape (irregular polygonal, roughly regular rectangular and irregular elliptical); four types of papilla (triangular, with striate wall, finger and star shapes); two main types and three subtypes of epicuticular wax; seven type classes of outer stomatal and peristomatal rims/stomata ledge aperture; three types of wax distribution on the stomata rims/pore/epidermal cell and three types of inner stomatal rims variations (smooth, sinuolate and sinuolate-erose) were identified. The result revealed that leaf micromorphological evidences of Hypericum are taxonomically informative and can be used for separating different sections and species

Effects of oral gavage treatment of Eupatilin on protection of skin flaps in rats

Introduction: Nowadays, skin flaps are used to repair wounds, skin lesions and in reconstructive surgeries. In this way, the main problem is loss of flap tissue and necrosis, due to processes that result from ischemia-reperfusion injury and reactive oxygen species. Eupatilin is an O-methylated flavone derived from Artemisia plants that demonstrates anti-inflammatory, anti-oxidative, and anti-tumor effects. In this study, we evaluated the effect of Eupatilin administration on the survival of skin flap and oxidative stress by measuring necrotic area of skin flap and oxidative stress markers, in rats. Materials and Methods: Forty rats were divided into four groups (10 rats per group), including Sham group, Flap group, Eupatilin+ Flap group (received Eupatilin before flap), and Flap + Eupatilin group (received Eupatilin after flap). Eupatilin (10 mg / kg) was administered as oral gavage to mice. One week after flap surgery in a 3 x 8 cm scale, flap necrosis, malondialdehyde (MDA) levels-using thiobarbituric acid method (TBA)-and superoxide dismutase (SOD)-using an oxidase enzymatic method-was measured. Results: Treatment with Eupatilin, before or after flap, reduced the necrosis area of flap (P <0.05 vs flap group). Decreased MDA level (P <0.05 vs flap group) and increased superoxide dismutase activity (SOD) (P <0.01 vs flap group) are shown. Conclusion: The data obtained from this study demonstrated improvement of skin flap survival in rats and reduction of tissue necrosis and oxidative stress by Eupatilin treatment, either before or after flap surgery. © 2019, Semnan University of Medical Sciences. All rights reserved

Pre-pregnancy maternal cardiovascular diseases and risk of offspring’s neurodevelopmental disorders: a population-based cohort study.

Objective Maternal exposure to cardiovascular disease (CVD) is associated with adverse maternal and neonatal health outcomes. However, its association with offspring’s long-term neurodevelopmental disorders (NDDs) is not yet known. We aimed to investigate the association between maternal pre-existing CVDs and children’s NDDs. Approach This nationwide cohort study included 2.7 million live singleton births recorded in the Swedish Medical Birth Register between 1990 and 2019. Information on maternal pre-pregnancy CVDs was extracted from the National Patient Register, including diagnosis of cerebrovascular disease, heart failure, arrhythmia, valvular and congenital heart diseases. Registered diagnoses of offspring NDDs included Attention-Deficit/Hyperactivity Disorder (ADHD), Autism Spectrum Disorder (ASD), and intellectual disability. Cox proportional hazards models were fitted to estimate Hazard Ratios (HRs) and 95% Confidence Intervals (CIs) for the associations. All estimates were adjusted for offspring’s age at diagnosis, sex, calendar period, and maternal characteristics including age at birth, parity, education, country of birth, cohabitation status, smoking, psychiatric illness, pre-gestational diabetes, and hypertension. Results The overall prevalence of maternal CVDs was 0.8% between 1990 and 2019. A total of 141 651 individuals (5.2%) received a diagnosis of ADHD, 64 691 (2.4%) of ASD, and 22 913 (0.9%) received a diagnosis of intellectual disability. The adjusted analyses showed that offspring of mothers with CVD had 16% higher rate of ADHD (HR 1.16; 95% CI: 1.09-1.24) and 12% higher rate of ASD (HR 1.12; 95% CI: 1.02-1.23), compared with offspring of mothers without CVD. Specifically, maternal heart failure was associated with 1.93-fold increased HR of ASD (95% CI: 1.21-3.08), maternal arrhythmia with 14% increased rate of ADHD (95% CI: 1.04-1.24), and maternal cerebrovascular disease was associated with 30% elevated rate of ASD (95% CI: 1.07-1.59) and 17% elevated rate of ADHD (95% CI: 1.02-1.36). No association was found between maternal CVDs and intellectual disability. Conclusion Maternal CVD before pregnancy may be a risk factor for offspring’s ADHD and ASD, with varied risks by CVD subtypes. The mechanisms behind the associations warrant further investigations

Relationship between Body Mass Index, Risk of Venous thromboembolism and Pulmonary Embolism: a systematic review and dose-response meta-analysis of cohort studies among four million participants

Background: The relationship between body mass index (BMI) and risk of venous thromboembolism (VTE) and pulmonary embolism (PE) is a controversial issue. This dose-response meta-analysis was performed to investigate the association between BMI and risk of VTE and PE incidence based on cohort studies. Method: A comprehensive systematic search was conducted up to August 2019 in MEDLINE/PubMed, SCOPUS, and Cochrane. DerSimonian and Laird random-effects models were run to estimate combined hazard ratios (HRs) with 95% confidence intervals (CIs). Dose-response analysis was also carried out based on BMI values. Results: Eleven articles with 16 arms and 3,910,747 participants were eligible for inclusion in this systematic review and meta-analysis. Pooled results showed a positive association between BMI and risk of VTE in the obese participants compared to participants classified in the normal BMI category (HR: 1.62, 95% CI: 1.29-2.04, I2 = 95%). Furthermore, results showed a significant association between lower BMI (underweight versus normal BMI category) and reduced risk of PE (HR: 0.80, 95% CI: 0.70-0.92, I2 = 9%) and higher risk of PE in obese versus normal BMI participants (HR: 2.24, 95% CI: 1.93-2.60, I2 = 0%). There was a significant linear relationship between BMI and risk of VTE (p &lt; 0.001) and PE (p &lt; 0.001). Conclusions: This systematic review and dose-response meta-analysis with 3,910,747 participants highlights obesity as a significant risk factor related to the incidence of VTE and PE. 2020 Elsevier LtdThe student research committee at Shahid Beheshti University of Medical Sciences was the financial supporter of this study (19163).Scopu