3 research outputs found
Evidence of a new shell closed nucleus governing slow quasi-fission
Mass distributions of fission fragments arising from the slow quasi-fission
process have been derived by comparing the measured distributions with the
theoretical distributions based on compound nuclear fission model for several
reactions. The mass-distributions corresponding to quasi-fission events for all
the systems show the following common features: (1) they are double peaked with
fixed peak-centroids and nearly same width at different incident energies, (2)
the yield of quasi-fission events decreases with the increasing projectile
energy, and (3) peak corresponding to lighter fragment is observed at A
96 for all the systems, whereas the peak of heavier fragment increases linearly
with the mass of the di-nuclear system. All the above observations are quite
similar to the ones observed in well known asymmetric fission of actinides,
thus providing clear evidences of shell effect in slow quasi-fission where the
lighter fragment is possibly nuclei around Zr, a new doubly magic
nucleus. This finding has great implications in the study of nuclear reactions,
structure and particularly in super-heavy element synthesis where quasi-fission
is synonymous
Effects of yoga on hypothyroidism: A systematic review
Evidence from clinical trials has shown positive effects of yoga on hypothyroidism. To date, there is no review of these studies. This systematic review evaluates the efficacy of yoga as a therapeutic intervention for hypothyroidism.PubMed, Medline, PsycINFO, and Science Direct databases were searched to identify relevant literature. The review included clinical studies that evaluated the effects of yoga on hypothyroidism. Studies that were not conducted inenglish, unavailable, non-experimental, or those that were reviews, case studies, case reports, not based on yoga, involved yoga as a intervention, or included a mixed population were excluded.Eleven studies (n = 516) met the eligibility criteria. Of these, four studies were RCTs, two non-RCTs and five were pretest-posttest studies. The duration of the yoga intervention varied from 1 to 6 months. Most of these studies adopted a combination of suryanamaskar, asana, pranayama and meditation. On quality assessment, one study had a low risk of bias (1 RCT), six studies had a moderate risk of bias (3 RCTs, one non-RCT and two pretest-posttest studies), and four studies had a high risk of bias (1 non-RCT and three pretest-posttest studies). The outcome measures assessed were TSH, T3, T4, and thyroid medication usage, lipid indices, BMI, heart rate variability, pulmonary measures, blood glucose, anxiety, depression, self-esteem, quality of life and sleep. The majority of the studies reported significant improvements in these outcomes following yoga intervention.This systematic review reports evidence for effects of yoga on various outcome measures in hypothyroidism, suggesting its possible role in the management of hypothyroidism. However, there is a need for adequately powered, high-quality RCT studies in the future to draw a definitive conclusion