Enhanced synchronization in an array of spin torque nano oscillators in the presence of oscillating external magnetic field

We demonstrate that the synchronization of an array of electrically coupled spin torque nano-oscillators (STNO) modelled by Landau-Lifshitz-Gilbert-Slonczewski (LLGS) equation can be enhanced appreciably in the presence of a common external microwave magnetic field. The applied microwave magnetic field stabilizes and enhances the regions of synchronization in the parameter space of our analysis, where the oscillators are exhibiting synchronized oscillations thereby emitting improved microwave power. To characterize the synchronized oscillations we have calculated the locking range in the domain of external source frequency.Comment: Accepted for publication in Europhysics Letters (EPL

Effect of biofertilizer and some plant growth hormones on germination and seedling character of Sesame (Sesamum indicum (L.)

In this study, the effect of plant growth regulators (IAA and GA3 ) and living bacteria containing (Azospirillam) biofertilizer were investigated on the germination, root length and shoot length. The seeds of sesame variety TMV – 7 were treated with different concentration of gibberlic acid (1.0mgL-1, 1.5 mgL-1, 2.0 mgL-1 and 2.5 mgL-1) and indole acetic acid(1.0mgL-1, 1.5 mgL-1, 2.0 mgL-1 and 2.5 mgL-1). The biofertilizer, Azospirillam was mixed with rice Starch in a container to form slurry . Germination, root length and shoot length were evaluated. From the results, it was observed that the biofertilizer had regulatory effect on seed germination, root length and shoot length over control. In plant growth hormones treated plants, 2.0mg/l of GA3 shows maximum effect compared to IAA. It can be concluded that, the biofertilizer treatment stimulated the germination and growth by excreting phytohormones and enhancing the nutrient mobilization from the seed

Effects of tranexamic acid in major orthopedic surgical procedures: a randomized comparative study

Background: Despite modern healthcare system, major surgeries always cause economical constraints. Complications due to blood loss, long hospital stay are most common in major surgical procedures. Tranexamic acid (TXA), a synthetic derivative of lysine is used instead of blood transfusion to control bleeding peri and post operatively. Hence this study was planned to assess the effects of tranexamic acid on various orthopedic surgical procedures, in terms of blood loss, duration of surgical procedure and hospital stay.Methods: Prospective randomized comparative study, among patients undergoing elective and emergency orthopedic surgery. Patients with multiple fractures, organ injury and CKD were excluded from this study. Patients were randomized to tranexamic acid (TXA) group and colloids, blood transfusion group based on computer generated random numbers. Thirty two patients were randomized to tranexamic acid group and thirty two in control group. Statistical analysis was done using SPSS V 20.Results: The mean age group was 38.41±11.4 and 36.83±13.5 in TXA group and control group respectively. The mean SD for blood loss in TXA group was 321.5±124.7 and control group 482.7±189.6, the difference was found to be highly statistically significant with p=0.0002. Likewise the difference in postoperative Hb was found to be statistically significant with p<0.01. The p value for surgical site infection and hematoma was not statistically significant.Conclusions: TXA significantly reduces blood loss and blood transfusion requirements in patients undergoing orthopedic surgery

Effects of intra articular steroids, hyaluronic acid and combination of both among patients with knee osteoarthritis

Background: Osteoarthritis (OA) is a common degenerative disorder of articular cartilage accompanied by hypertrophic changes of the bone. In the management of OA, though use of intra articular (IA) injection of steroids, hyaluronic acid (HA) separately plays an important role, their effects in terms of reducing pain, joint stiffness and movement restriction when it is used in combination remains a question. Hence this study was planned to assess the effects of HA and steroids alone with combination of both Ha and steroids.Methods: Prospective randomized comparative study, among patients with osteoarthritis knee attending the outpatient department of Orthopedics in a tertiary care hospital during January 2017 to May 2018, were included. Patients were randomized in three groups (steroids, HA and combination of both) and a total of 96 patients were included and the outcome was assessed by WOMAC scale. Statistical analysis was done using SPSS Version 20.Results: Pain and movement restriction, at the end of fourth week and pain, joint stiffness and movement restriction, were found to be statistically improved in combined steroids and HA group than the group with steroids alone. Similarly at the end of third month, pain and movement restriction were found to be statistically improved in combined steroids and HA group than HA group alone.Conclusions: This study demonstrates that HA together with corticosteroid provides pain relief, reduction of joint stiffness and helps in improving joint movements within three months after treatment

Effect of Gibberellic Acid and Indole 3-Acetic Acid on Seed Germination Performance of Horse gram (Macrotyloma uniflorum) Lam (Verdc)

The experiment was undertaken with an objective to investigate the effect of various concentrations of plant growth regulators, i.e., Gibberellic acid (GA3) and Indole 3-acetic acid (IAA) on seed germination of Macrotyloma uniflorum. Seeds were soaked for 12 hours in different concentrations substances (1.0, 2.0, 3.0 and 4.0 mg/L) of IAA, GA3 and control set was soaked only in distilled water.  Three replicates of each treatment with fifty seeds per replicate were arranged for precise physiological analysis. Significant variation was found in all aspects after analysis of variance (ANOVA) of each mean value. After two weeks of seed soaking, it was noted that germination percentages were significantly accelerated by lower concentrations (1 and 2 mg) of used hormones. Amongst the two potential growth regulators, 2 mg/L was found most effective because it showed highest germination percentage for IAA (93%) and GA3 (88%). A great deal of information relating to seed germination practices shows that these plant growth regulators were efficient in overcoming dormancy leading to rapid seed germination. IAA was selected as best hormone in this study, which showed highest seed germination (93%).