Electrical Properties of Indian Soils at Medium Broadcast Frequencies

The electrical conductivity and the effective dielectric constant of soils from different places of India have been determined each for seven different frequencies within the medium broadcast frequency range and also with different moisture contents by the differential transformer method. Samples of soil were produced from Dacca, Calcutta, Lucknow, Delhi, Lahore, Peshawar, Bombay, Calicut (Madras Presidency), and Trichinopoly. The conductivity was observed to increase with both frequency and moisture content. Rut the rate of increase with moisture was very great while that with frequency was small. The effective. (dielectric constant was found to decrease with frequency and to increase with moisture contents. From the observed values of the soil conductivity at 20% moisture the field strength attenuation curves for all the stations (except Delhi) of the All-India Radio have been drawn. Suitable antenna-heights in relation to wave lengths have also been calculated for all the A.I.R. transmitting stations on the basis of the measured values of the soil conductivity

Health-seeking behaviour of stroke patients in a rural area of Bangladesh

Background: Improper health-seeking behaviours (HSB) have been correlated with detrimental health outcomes, elevated rates of illness and mortality. The study aimed to investigate how stroke patients in a rural community of Bangladesh seek health care. Methods: A cross-sectional survey was conducted in the Raiganj sub-district of Sirajganj district from January to June 2016, using a validated screening tool to identify stroke patients at the household level. Neurologists confirmed the diagnosis after examining all suspected cases. Out of the 419 suspected cases identified during the screening process, 186 cases were officially reported after undergoing a confirmed diagnosis. Information on health-seeking behaviour was collected through face-to-face interviews with patients or their attendants. Results: After experiencing a stroke, approximately 35% of patients received treatment from unregistered care providers and over 40% received treatment outside of a hospital setting. Males were significantly more likely than females to receive treatment from registered physicians or hospitals (P<.05 and P<.01). A significantly higher proportion of educated individuals sought healthcare from registered physicians or hospitals (P<.05). Although better health-seeking behaviour was observed among higher-income groups, the findings were not statistically significant. Around 67% of patients were found to be hypertensive, with about one-third of them not taking any medication for their elevated blood pressure. Approximately 37% of patients had elevated blood glucose levels but only 22% were taking medication. Conclusion: A notable proportion of stroke patients in rural Bangladesh sought treatment from unqualified service providers. Health-seeking behaviour was associated with factors such as gender, education, and economic condition. Bangabandhu Sheikh Mujib Medical University Journal 2023;16(2): 75-8

Exploring perceptions of common practices immediately following burn injuries in rural communities of Bangladesh

© 2018 The Author(s). Background: Burns can be the most devastating injuries in the world, they constitute a global public health problem and cause widespread public health concern. Every year in Bangladesh more than 365,000 people are injured by electrical, thermal and other causes of burn injuries. Among them 27,000 need hospital admission and over 5600 people die. Immediate treatment and medication has been found to be significant in the success of recovering from a burn. However, common practices used in the treatment of burn injuries in the community is not well documented in Bangladesh. This study was designed to explore the perception of local communities in Bangladesh the common practices used and health-seeking behaviors sought immediately after a burn injury has occurred. Methods: A qualitative study was conducted using Focus Group Discussions (FGD) as the data collection method. Six unions of three districts in rural Bangladesh were randomly selected and FGDs were conducted in these districts with six burn survivors and their relatives and neighbours. Data were analyzed manually, codes were identified and the grouped into themes. Results: The participants stated that burn injuries are common during the winter in Bangladesh. Inhabitants in the rural areas said that it was common practice, and correct, to apply the following to the injured area immediately after a burn: egg albumin, salty water, toothpaste, kerosene, coconut oil, cow dung or soil. Some also believed that applying water is harmful to a burn injury. Most participants did not know about any referral system for burn patients. They expressed their dissatisfaction about the lack of available health service facilities at the recommended health care centers at both the district level and above. Conclusions: In rural Bangladesh, the current first-aid practices for burn injuries are incorrect; there is a widely held belief that using water on burns is harmful

Astaxanthin improves behavioral disorder and oxidative stress in prenatal valproic acid-induced mice model of autism

Prenatal exposure to valproic acid on gestational day 12.5 may lead to the impaired behavior in the offspring, which is similar to the human autistic symptoms. To the contrary, astaxanthin shows neuroprotective effect by its antioxidant mechanism. We aimed to (i) develop mice model of autism and (ii) investigate the effect of astaxanthin on such model animals. Valproic acid (600 mg/kg) was administered intraperitoneally to the pregnant mice on gestational day 12.5. Prenatal valproic acid-exposed mice were divided into 2 groups on postnatal day 25 and astaxanthin (2 mg/kg) was given to the experimental group (VPA_AST, n = 10) while saline was given to the control group (VPA, n = 10) for 4 weeks. Behavioral test including social interaction, open field and hot-plate were conducted on postnatal day 25 and oxidative stress markers such as lipid peroxidation, advanced protein oxidation product, nitric oxide, glutathione, and activity of superoxide dismutase and catalase were estimated on postnatal day 26 to confirm mice model of autism and on postnatal day 56 to assess the effect of astaxanthin. On postnatal day 25, prenatal valproic acid-exposed mice exhibited (i) delayed eye opening (ii) longer latency to respond painful stimuli, (iii) poor sociability and social novelty and (iv) high level of anxiety. In addition, an increased level of oxidative stress was found by determining different oxidative stress markers. Treatment with astaxanthin significantly (p < 0.05) improved the behavioral disorder and reduced the oxidative stress in brain and liver. In conclusion, prenatal exposure to valproic day in pregnant mice leads to the development of autism-like features. Astaxanthin improves the impaired behavior in animal model of autism presumably by its antioxidant activity