Spectroscopic determination of the role of vanadyl oxygen in room temperature NH3 sensing by V2O5 nanoparticles.

In the present study, a multi-modal approach consisting of in-situ photoluminescence, Raman, and UV-Vis absorption spectroscopic studies is carried out along with chemiresistive sensing to unveil the mechanism of NH3 gas sensing by V2O5 nanoparticles in ambient air. V2O5 nanoparticles with an average size of 49 nm show a superior sensor response of 17 ± 1.5 % towards 1 ppm of NH3 gas with a response and recovery time of 96 s and 45 s, respectively. The photoluminescence and UV-Vis absorption studies in the presence of NH3 reveal electron doping to a new energy level at 1.84 eV, resulting in conduction band filling and increase in the optical band gap. The intensity of the photoluminescence spectrum shows an increase in the presence of NH3 gas as a result of this electron doping. The sensor response from the optical sensing carried out by in-situ photoluminescence study is 43 % for 40 ppm of NH3 gas. The vanadyl oxygen site is the most active in the sensing process, as evident by a selective enhancement in the intensity of V-O (vanadyl) bond vibration. This study gives an experimental evidence for the changes in optical and electronic properties of V2O5 on the adsorption of NH3 gas molecules.

Non-invasive Resolution of Pathological Ovarian Masses with Homeopathic Treatment-A Case Series.

BACKGROUND: Ovarian masses may be either physiological or pathological. Physiological ovarian masses are non-neoplastic. Pathological masses grow more than 7 cm and persist beyond 3 months; they do not resolve spontaneously, and invasive surgery with removal of reproductive organs is the conventional treatment. It usually results in further co-morbidities and hampers the quality of life of the patient. OBJECTIVES: This case series of pathological left ovarian masses demonstrates the role of homeopathic treatment in each of two multiparous women where the right ovary was surgically removed previously for similar pathology and in an adolescent girl with increased tumor marker CA-125. METHODS: Three cases of women with pathological ovarian masses in the left ovary, and advised invasive surgery by attending gynecologists, were treated with homeopathic medicines at the outpatient department of the National Homeopathy Research Institute in Mental Health, Kottayam, Kerala, from 2017 to 2020. Each case was followed up with clinical and ultrasonographic evidence and reported according to the criteria set out in the HOM-CASE guidelines. RESULT: Complete resolution of the ovarian masses was observed in all three cases, evidenced by ultrasonography, with normalizing CA-125 values also observed in the case of endometrial cyst. The patients improved within 4 to 15 months of treatment using Thuja and other individualized homeopathic medicines. The MONARCH score was calculated as +7/13, +9/13, and +9/13 for the three cases, respectively, indicating a positive causal attribution of homeopathy in the resolution of these pathological ovarian masses. CONCLUSION: This case series suggests that individualized homeopathy, and notably Thuja, can be useful in the treatment of pathological ovarian masses.

What determines nutritional recovery in malnourished children after correction of congenital heart defects?

BACKGROUND: Malnutrition is common in children with congenital heart disease (CHD), especially in developing countries. OBJECTIVE: To examine the impact of corrective intervention on the nutritional status of children with CHD and identify factors associated with suboptimal recovery. METHODS: Consecutive patients with CHD in a tertiary center in South India were evaluated for nutritional status before and 2 years after corrective intervention. Anthropometry was performed at presentation and every 6 months for 2 years, and z scores were compared. Malnutrition was defined as a weight-for-age, height-for-age, and weight/height z score <-2. Determinants of malnutrition were entered into a multivariate logistic regression analysis model. RESULTS: Of 476 patients undergoing corrective intervention (surgical: 344; catheter-based: 132) z scores of less than -2 for weight for age, height for age, and weight/height were recorded in 59%, 26.3%, and 55.9% of patients, respectively, at presentation. On follow-up (425 patients [92.5% of survivors; 20.63 +/- 13.1 months of age]), z scores for weight for age and weight/height improved significantly from the baseline (weight: -1.42 +/- 1.03 vs -2.19 +/- 1.16; P < .001; weight/height: -1.15 +/- 1.25 vs -2.09 +/- 1.3; P < .001). Height-for-age z scores were not significantly different. Malnutrition persisted in 116 (27.3%) patients on follow-up and was associated with a birth weight of