Spin distribution as a probe to investigate the dynamical effects in fusion reactions

The spin distributions are measured for the compound nucleus 80Sr populated in the reactions 16O+64Zn and 32S+48Ti. The comparison of the experimental results for both the systems shows that the mean γ-ray multiplicity values for the system 32S+48Ti are lower than those for 16O+64Zn. The spin distribution of the compound nucleus populated through the symmetric channel is also found to be lower than the asymmetric channel. Present investigation directly shows the effect of entrance channel mass asymmetry on the reaction dynamics

Effects on Aircraft Performance Due to Geometrical Twist of Wing

This paper provides an overview of the effects of Geometric Twist on Aircraft performance by introducing a washout condition in an aircraft wing. This condition results in an effective Angle of Attack at the wingtip that is lower than the Angle of Attack at the wing root. Using CFD analysis, the variation of aircraft performance factors such as lift, drag coefficients, and aerodynamic efficiency is calculated for different Twist angles. A plot of lift and drag coefficients at varying Angle of Attack angles has been generated based on these analyses. These results illustrate the advantages of wing twist variation, particularly at higher angles of attack. One significant advantage of Geometric Twist is that it causes stall conditions to first occur at the wing root, providing a signal to the pilot to control the aircraft before the stall reaches the wingtip. This ensures the effectiveness of control surfaces, such as Ailerons and Flaps, located at the wing trailing edge. A comparison is made between the lift, drag coefficients, and aerodynamic efficiency of twisted wings and untwisted wings with identical parameters. While twisting the wingtip yields favourable results at higher Angles of Attack (AOA) compared to an untwisted wing, the aerodynamic efficiency of the wings decreases at lower AOA. However, applying the twist angle at high angles of attack, such as 10, 12.5, 15, and 20 degrees, leads to an increase in aerodynamic efficiency

Idiopathic sialectasia of Stensen’s duct treated by marsupialisation of ectatic segment

Introduction:Sialectasis of parotid duct is an uncommon condition characterised by abnormal dilatation of a part or whole of the Stensen's duct. It may lead to recurrent parotid infections as well as a cause of concern for the patient. Superficial parotidectomy is the accepted surgical treatment for this condition. Case Report: A case of idiopathic dilatation of parotid duct is presented. It was treated by marsupialisation of the sialectatic segment.This procedure proved to be much simpler and safer than superficial parotidectomy whilst being equally effective. Conclusion: In cases of Stensen's duct sialectasis without any abnormality of the parotid gland, marsupialisation of the ectatic segment should be the treatment of choice

Occurrence of falcated teal Anas falcata Georgi in west Bengal

Volume: 92Start Page: 262End Page: 26

A successful pregnancy occurred after isolating the offending antibody(s) and choosing appropriate sperm donor of similar phenotype

Sensitization against Rh(D )is the most common cause of haemolytic disease of fetus and newborn (HDFN). Now a days, a widespread use of antenatal and postnatal Rh immunoglobulin has resulted in marked decrease in prevalence of Rh(D) alloimmunization. Fetal loss due to other red cell antigens gain importance as there are no prophylactic immunoglobulin are available. Here, we present a case of primary infertility associated with non Rh(D) alloimmunization which was detected in a 30 year old housewife during her ongoing infertility treatment. The antibody identification workup showed patient is having multiple alloantibodies , probable anti-c, and anti-Fya. The extended phenotype shows that the husband is mismatched with the wife's phenotype in “c” and Fya. Also the probable antibody in the mother's serum are anti-c and anti-Fya which are noted to cause HDFN as per literature

Catalytic H₂O₂ Disproportionation and Electrocatalytic O₂ Reduction by a Functional Mimic of Heme Catalase: Direct Observation of Compound 0 and Compound I in Situ

A phenolate-bound Fe-porphyrin complex assembled in situ, atop self-assembled monolayer (SAM) covered Au surfaces, can disproportionate hydrogen peroxide chemically with a turnover frequency (TOF) of 25 s^–1 and turnover number (TON) >10⁵ in a pH 7 buffer solution at room temperature. The same catalase mimic is found to selectively reduce oxygen to water when the cathodic potential is applied to the same surface: i.e., electrochemically. In situ resonance Raman (rR) experiments reveal the accumulation of compound I during chemical H₂O₂ disproportionation and compound 0 during electrochemical O₂ reduction, allowing spectroscopic detection of two key intermediates proposed to be involved in the mechanism of heme catalases that have, so far, remained elusive. The FeO vibration of a phenolate-bound compound I species is identified at 803 cm^–1, which shifts to 796 cm^–1 on hydrogen bonding. The Fe–O and O–O vibrations of the compound 0 species are identified at 587 and 830 cm^–1, respectively. The observation of two different intermediates under two different reaction conditions implies the fundamental differences in the mechanisms of H₂O₂ disproportionation and O₂ reduction

Ammonium Tetrathiomolybdate: A Versatile Catalyst for Hydrogen Evolution Reaction from Water under Ambient and Hostile Conditions

The lack of catalysts that can selectively reduce protons to produce hydrogen from water in the presence of oxygen and other conventional inhibitors of hydrogen evolution reaction (HER) has been a fundamental problem stalling the development of a practical hydrogen economy. Ammonium tetrathiomolybdate (ATM), a common laboratory reagent, spontaneously assembles on Au electrodes. Atomic force microscopy, scanning electron microscopy, and X-ray photoelectron spectroscopy data indicate formation of multiple layers of ATM which are stable over a wide pH range for days. These assemblies can produce hydrogen with very low onset potentials. It shows a turnover rate of 1.4 s^–1 and turnover number >5 × 10⁴ in pH 7 at 180 mV overpotential. The pH dependence of the peak potential suggests that the generation of H₂ from water proceeds likely via a ligand based proton coupled electron transfer process which precludes inhibition by O₂. The ATM functionalized Au electrodes are found to efficiently catalyze HER in saline rich, CO saturated, and sulfide rich water sources with minimal inhibition of catalytic activity