Effect of magnesium sulphate solution on compressive strength and sorptivity of blended concrete

Jena, Trilochan,Panda, Kishor C. Techno-Press 2020 Advances in concrete construction Vol.9 No.3

This paper reports on the result of an experimental investigation carried out to study the compressive strength and sorptivity properties of blended cement concrete exposed to 5% and 10% MgSO₄ solution using fly ash (FA) and silpozz. Usually in sulphate environment the minimum grade of concrete is M30 and the mix design is done for target mean strength of 39 MPa. Silpozz is manufactured by burning of agro-waste rice husk in designed furnace in between 600° to 700℃ which is one of the main agricultural residues obtained from the outer covering of rice grains during the milling process. There are four mix series taken with control mix. The control mix made 0% replacement of FA and silpozz with Ordinary Portland Cement (OPC). The first mix series made 0% FA and 10-30% replacement of silpozz with OPC. The second mix series made with 10% FA and 10-40% replacement of silpozz with OPC. The third mix series made 20% FA and 10-30% replacement of silpozz with OPC and the fourth mix series made 30% FA and 10-20% silpozz replaced with OPC. The samples (cubes) are prepared and cured in normal water and 5% and 10% MgSO₄ solution for 7, 28 and 90 days. The studied parameters are compressive strength and strength deterioration factor (SDF) for 7, 28 and 90 days. The water absorption and sorptivity tests have been done after 28 days of normal water and magnesium sulphate solution curing. The investigation reflects that the blended cement concrete incorporating FA and silpozz showing better resistance against MgSO₄ solution when compared to normal water curing (NWC) samples.

Mechanical and durability properties of marine concrete using fly ash and silpozz

Jena, T.,Panda, K.C. Techno-Press 2018 Advances in concrete construction Vol.6 No.1

This article reports the utilization of fly ash (FA) waste product from industry and silpozz which is an agro-waste from agriculture as an environmental friendly material in construction industry. The evaluation of strength and durability study was observed using FA and silpozz as a partial replacement of Ordinary Portland Cement (OPC). The studied parameters are compressive strength, flexural strength, split tensile strength and bond strength as well as the durability study involves the acid soluble chloride (ASC), water soluble chloride (WSC), water absorption and sorptivity. Scanning electron microscopy (SEM) and XRD of selected samples are also done. It reveals from the test results that the deterioration factor (DF) in compressive strength is 4% at 365 days. The DF of split tensile strength and flexural strength is 0.96% and 0.6% at 90 days respectively. The minimum slip is 1mm and 1.1mm after 28 days of testing bond strength for NWC and SWC sample respectively. The percentage decrease in bond strength is 10.35% for 28 days SWC samples. The pre-cast blended concrete samples performed better to chloride diffusion. Modulus of elasticity of SWC samples are also studied.The water absorption and sorptivity tests are conducted after 28 days of curing.

Hypertension secondary to renal hypoplasia presenting as acute heart failure in a newborn

Jena Deitrick,Kayle Stevenson,Daniel Nguyen,William Sessions,Vijay Linga,Tetyana Vasylyeva 대한고혈압학회 2019 Clinical Hypertension Vol.25 No.3

Introduction: Neonatal hypertension is defined as persistent systolic and/or diastolic blood pressures above the 95th percentile compared to other infants of similar gestational age and size. Neonatal hypertension is a rare condition, occurring in only 0.2–3.0% of neonates. The most common etiology of neonatal hypertension is renal vascular or parenchymal disease, and it is usually detected on routine examination in an asymptomatic child. However, it may present in a variety of manners, including acute heart failure, renal dysfunction, feeding difficulties, failure to thrive, tachypnea, apnea, lethargy, irritability, or seizures. Case presentation: A term female was born via repeat caesarean section with vacuum extraction. On day of life (DOL) 3, the baby presented to the emergency department with poor feeding and lethargy. Initial laboratory tests indicated severe metabolic acidosis and the patient was transferred to our neonatal intensive care unit (NICU). During the hospital stay, the patient had intermittently high blood pressures. An echocardiogram was ordered, which demonstrated a severely decreased ejection fraction of 33%, but no signs of coarctation of the aorta. The low ejection fraction and constellation of symptoms were consistent with the diagnosis of acute heart failure, so treatment with milrinone was initiated. Further labs demonstrated elevated renin and aldosterone, and a computed tomography scan showed right kidney hypoplasia with reduced perfusion. This suggested a renovascular etiology of hypertension causing the initial presentation of acute heart failure. The patient was started on enalapril and clonidine for blood pressure control and was discharged with a home blood pressure monitoring system. At 5 months of life, this patient was still on enalapril and amlodipine as well as home blood pressure monitoring. Conclusions: Acute heart failure is a rare presentation of neonatal hypertension, and prompt recognition and treatment for the underlying systemic hypertension is necessary to provide the best possible outcomes for patients. Due to the lack of sufficient evidence, treatment of hypertension in newborns is often anecdotal in nature. Further awareness of neonatal hypertension and research determining ideal methods of diagnosis and treatment would benefit physicians and their affected patients.

Self-rated health and dietary adherence in people with chronic kidney disease

Jena Lee,Min Joo Kim,Jee Yun Park,Sun Em,Jung Yeon Quon,Soo Kyung Park 한국간호과학회 2021 한국간호과학회 학술대회 Vol.2021 No.10

Aim(s): Self-rated health (SRH) was thought to be an important indicator for health-related behavior in people with chronic diseases. It also has been reported that SRH was a significant predictor for dietary adherence in people with other chronic diseases. However, little is known about SRH and its relationship to dietary adherence in people with chronic kidney disease (CKD). Thus, the purposes of this study were 1) to describe SRH, 2) identify its associated factors, and 3) investigate the relationship between the SRH and dietary adherence in people with CKD. Method(s): This was a secondary analysis of dataset from 7th Korea National Health and Nutrition Examination Survey (2016-2018). Those who had estimated glomerular filtration rate (eGFR) of <60 mL/min/1.73 m2 (N=557, mean age=71.75, eGFR=58.9, male=56.8%) were included in this study. Data for demographic and clinical characteristics, and dietary adherence were obtained by interview and physical examination. Compliance for diet therapy and daily potassium level were included to describe dietary adherence. Descriptive and inferential statistics were used to analyze the data. Result(s): 320(57.5%) participants rated their SRH as “good” or “moderate” (better SRH), whereas 237(42.5%) participants responded “poor” (worse SRH). Multivariate logistic regression showed that male participants, those who were old, had middle income level, did muscular exercise were more likely to have better SRH. Current smoker and those with anxiety/depression and multiple chronic diseases were less likely to have better SRH. Regarding relationship of SRH to dietary adherence, those with better SRH were more likely to be noncompliant to diet therapy and to take more than 2.5grams of potassium, after controlled for other covariates. Conclusion(s): Understanding of associated factors for SRH and its relationship to dietary adherence will help healthcare providers develop more effective interventions to improve SRH and its impact on dietary adherence in people with CKD.

Extending Application of the 'Hardcore' Definition to Smokeless Tobacco Use: Estimates from a Nationally Representative Population in India and its Implications

Jena, Pratap Kumar,Bandyopadhyay, Chandan,Mathur, Manu Raj,Das, Sagarika Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.12

Background: The term 'hardcore' has been applied to use of smoking tobacco and generally referred to as the inability or unwillingness of regular smokers to quit. The component constructs of hardcore except nicotine dependence are product neutral. With the use of 'time to first chew' as a measure of nicotine dependence, hardcore definition can be extended to characterize smokeless tobacco users. Hardcore users respond less to tobacco cessation interventions, and are prone to tobacco induced diseases including cancer. Thus identifying hardcore users would help in estimate the burden of high risk population for tobacco induced diseases. Smokeless tobacco use is predominant and accounts for more than 50% of oral cancer in India. Hence, hardcore chewing information could be used for planning of tobacco and cancer control interventions. The objective of this study was to assess the prevalence and associated factors of hardcore smokeless tobacco use in India. Materials and Methods: Global Adult Tobacco Survey (GATS)-India 2010 data were analyzed to quantify hardcore smokeless tobacco use in India with following five criteria: (1) current daily smokeless tobacco use; (2) no quit attempt in the past 12 months of survey or last quit attempt of less than 24 hours duration; (3) no intention to quit in next 12 months or not interested in quitting; (4) time to first use of smokeless tobacco product within 30 minutes of waking up; and (5) knowledge of smokeless tobacco hazards. Results: The number of hardcore smokeless tobacco users among adult Indians is estimated to be 5% (39.5 million). This group comprises 23.2% of daily smokeless tobacco users. The population prevalence varied from 1.4-9.1% across different national regions of India. Logistic regression modeling indicated age, education and employment status to be the major predictors of hardcore smokeless tobacco use in India. Conclusions: The presence of a huge number (39.5 million) of hardcore smokeless tobacco users is a challenge to tobacco control and cancer prevention in India. There is an unmet need for a universal tobacco cessation programme and intensification of anti-tobacco education in communities.

Global Adult Tobacco Survey (GATS): A Case for Change in Definition, Analysis and Interpretation of "Cigarettes" and "Cigarettes Per Day" in Completed and Future Surveys

Jena, Pratap Kumar,Kishore, Jugal,Sarkar, Bidyut K. Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.5

Background: The Global Adult Tobacco Survey has 15 key indicators, cigarettes smoked per day (CPD) among daily smokers being one of them. The first wave of GATS in 14 countries indicated that mean CPD use is higher in women than men in India only, which is contrary to the current understanding of tobacco use globally. This study was undertaken to understand the unusual findings for mean CPD use in the GATS-India survey. Materials and Methods: Items B06a and B06b of the GATS India survey questionnaire that collected information on daily consumption of manufactured and rolled cigarettes were analyzed using SPSS software. Exclusive users were identified from these items after excluding the concurrent users of other tobacco products. Cigarette type, exclusive use and gender stratified analyses were made. Consumption of different types of cigarettes among the mixed users of manufactured and rolled cigarettes were correlated. Results: Higher mean number of CPD use among male daily-smokers was observed than their female counterparts in product specific analysis. Mean CPD as per GATS cigarette definition was higher in males than females for exclusive users but a reverse trend was observed in case of non-exclusive users. Use of manufactured cigarettes increased with increase in use of rolled cigarette among the mixed users and around half of these users reported equal CPD frequency for the both types of cigarettes. Conclusions: The anomaly in mean CPD estimate in GATS-India data was due to inclusion of two heterogeneous products to define cigarettes, variation in cigarette product specific user proportions contributing to the average and non-exclusive concurrent use of other tobacco products. The consumption pattern of cigarettes among the mixed users highlights bias in CPD reporting. Definition, analysis and interpretation of 'cigarettes per day' in the GATS India survey need to be improved by redefining cigarettes and making product specific analyses.

Oxidative Stress and Antioxidant Defences in the Tasar Silkworm Antheraea mylitta D: Challenged with Nosema Species

Jena, Karmabeer,Pandey, Jay Prakash,Sinha, Ajit Kumar Korean Society of Sericultural Science 2014 International Journal of Industrial Entomology Vol.28 No.2

This study was designed to find out the effect of Nosema spore on oxidative damages and antioxidant defence in the midgut of tasar silkworm Antheraea mylitta. Higher level of lipid peroxidation (LPX) and total hydroperoxides indicate the resultant oxidative stress in the Nosema exposed specimen. Increased superoxide dismutase (SOD) suggests activation of physiological mechanism to scavenge the superoxide radical produced during Nosema infection. Higher activities of catalase and glutathione-S-tranferase on $18^{th}$ d indicate adaptive behaviour of the tissue against oxyradicals. The results suggest that Nosema infection is involved in altering the active oxygen metabolism by modulating LPX and reactive oxygen species (ROS), which is indicative of pebrine disease disorder.

Generalized switched-capacitor multilevel inverter topology with self-balancing capacitors

Jena, Kasinath,Panigrahi, Chinmoy Kumar,Gupta, Krishna Kumar,Kumar, Dhananjay,Dewangan, Niraj Kumar The Korean Institute of Power Electronics 2022 JOURNAL OF POWER ELECTRONICS Vol.22 No.9

This paper presents a switched-capacitor topology with fewer switching components and reduced voltage stresses. The circuit contains eight switches and two capacitors to generate a five-level voltage waveform. This paper provides in-depth descriptions of the structural design, operation, and loss analysis. Inherently self-balanced capacitors are utilized in the proposed topology, which eliminates the need for additional charge balancing circuits and sensors. The control action was implemented using a simple logic-based multicarrier pulse width modulation (PWM) strategy. A brief comparative analysis with state-of-the-art topologies has been presented to demonstrate the merits of the developed topology. Finally, the feasibility and efficacy of the suggested topology have been evaluated using simulation and experimental testing to ensure that it is both feasible and effective.

Identification of Cold-Tolerant Breeding Lines by Quantitative Trait Loci Associated with Cold Tolerance in Rice

Jena, K. K.,Kim, S. M.,Suh, J.P.,Yang, C. I.,Kim, Y.G. Wiley (John WileySons) 2012 Crop science Vol.52 No.2

Genetic diversity in Oryza species and use of wild species in rice improvement

Jena Kshirod K.,Brar Darshan S.,Mackill David J. 한국작물학회 2003 한국작물학회 학술발표대회 논문집 Vol.2003 No.-