120 research outputs found
Efficient photo‐degradation of cationic dyes by Co3O4 and Sr‐Co3O4 spinel nanocomposites under solar light irradiation
No full textIn the present study Co3O4 and Sr-Co3O4 nanoparticles were prepared by sol-gel and co-precipitation methods and tested as photo-catalysts for the degradation of methylene blue (MB, model molecule of the thiazine dyes class) and malachite green (MG, model molecule of the triphenylmethane category)under solar light irradiation. To study the photocatalytic activity, Co3O4 was doped by three different weight percentages of strontium (5%, 10%, and 15%). Among these, 10 wt% Sr-Co3O4, named as (10)Sr-Co3O4, showed maximum photodegradation efficiency toward both MB and MG. Their structural and morphological characteristics, chemical composition, surface area, and optical properties were investigated by FT-IR spectroscopy, X-ray diffraction (XRD), Field Emission Scanning Electron Microscopy – Energy Dispersive Spectroscopy (FE-SEM-EDX), UV–Vis diffuse reflectance spectroscopy (DRS) and photoluminescence (PL) analysis. The XRD investigations of Co3O4 and (10)Sr-Co3O4 catalysts indicated retention of structure. The effect of initial pH, initial concentration of the dyes and photocatalysts dose was properly investigated. The results demonstrated the enhanced photocatalytic activity of (10)Sr-Co3O4 compared to that of pristine Co3O4 due to Sr doping that improves electron-hole (e–/h+) pairs separation mediated by charge migration on the Sr-Co3O4 structure. The as-prepared photocatalyst exhibited a remarkable photocatalytic efficiency towards both the dyes. (10)Sr-Co3O4 and Co3O4 degraded 96% and 88% of MB at pH = 11, and 92% and 85% of MG at pH = 9, respectively in 90 min. Moreover, it was demonstrated that the photodegradation of MB and MG by Sr-Co3O4 and Co3O4 followed a pseudo-first-order kinetics. Both the photocatalysts showed good stability during recycling maintaining high performances after five cycles. Finally, the active species were identified using various scavengers by trapping holes and radicals generated during the photocatalytic degradation proces
Germplasm Resources, Genes and Perspective for Aromatic Rice
No full textAromatic rice is considered an important commodity in the global market because of its strong aroma and eating and cooking quality. Asian countries, such as India and Pakistan, are the leading traders of Basmati rice, whereas Thailand is the major supplier of Jasmine rice in the international market. The strong aroma of rice is associated with more than 300 volatile compounds, among which 2-acetyl-1-pyrroline (2-AP) is the principal component. 2-AP is a phenotypic expression of spontaneous mutations in the recessive gene OsBadh2 or Badh2. The present review focuses on the origin, evolution and diversity of genetic resources of aromatic rice available worldwide. A brief discussion is presented on the genes responsible for quality traits along with details of their molecular genetics. This compilation and discussion will be useful for future breeding programs and the biofortification of quality traits of aromatic rice to ensure food security and nutritional need
Colloidal silver nanoparticles prepared by UV-light induced citrate reduction technique for the quantitative detection of uric acid
No full textMorphometric study of proximal femur in fractured and non-fractured post menopausal women
No full textObjective: This study was conducted to investigate the risk of hip fracture using proximal femoral morphometry in fractured and nonfractured postmenopausal women.Methods: We conducted an observational cross-sectional study with 138 postmenopausal women (49 fractured and 89 nonfractured). The hip axis length (HAL), femoral neck axis length (FNAL), acetabular width (AW), femoral head width (FHW), femoral shaft width (FSW), and femoral neck shaft angle (FNSA) were measured in all cases by dual energy X-ray absorptiometry. We also studied the correlation between body mass index (BMI) with all the parameters in fractured and control groups.Results:The mean age, height, weight, and BMI were 61.24±3.23, 163.94±7.84 cm, 71.88±9.14 kg, and 26.72±2.78 kg/m², respectively, in fractured patients. In nonfractured patients the values were 59.73±5.32, 161.73±4.25 cm, 69.54±6.25 kg, and 26.74±2.23 kg/m² respectively. The mean HAL, FNAL, AW, FHW, FSW, and FNSA were 130.5±3.18 mm, 111.26±3.64 mm, 18.2±1.91 mm, 53.46±1.51 mm, 37.45±1.82 mm, and 132.76±3.15 degree in case group and 130.84±4.74 mm, 112.48±4.08 mm, 17.57±2.32 mm, 53.4±1.86 mm, 35.29±1.82 mm, and 128.76±3.6° in control group, respectively.Conclusion: The femoral parameters such as HAL, FNAL, AW, and FHW do not indicate any correlation between fractured and control groups, whereas FSW and FNSA were significantly higher in case group. The FNSA was having significant negative correlation with BMI in fractured group while that was having a significant positive correlation in the nonfractured group. This observation will be helpful in exploration of its clinical significance in proximal femoral fracture.Keywords: Proximal femur, Morphometry, Postmenopausal, Fracture
Voltage Stability improvement based on firing angle control of SVCs in wind integrated system with ANN
No full textThe widening gap between energy generation and demand on a global scale, coupled with the imperative to reduce emissions, has necessitated the development of largescale sustainable energy solutions. Among the various renewable energy options, Wind Power stands out as a viable source capable of generating substantial amounts of electricity. However, the unpredictable nature of wind availability and its fluctuations pose challenges for grid operators in effectively harnessing and distributing the generated wind power. This issue becomes more pronounced when transmitting wind power through local grids to distant load centers. Voltage instability at local buses emerges as a significant concern in wind-integrated power systems. To address these challenges, dynamic compensation at multiple locations has proven to be an effective solution. Various alternative approach to controlling the firing of Static Var Compensators (SVCs) connected to the network is proposed in the present work. The traditional method, which relies on a classical control approach, is computationally intensive and time-consuming. To overcome this limitation, we propose the utilization of a trained Neural Network for simultaneous control of the firing angles of all SVCs, accommodating various system conditions such as change in load and wind generation fluctuations. Porposed method has been evaluated on both a modified IEEE-30 bus system and a 28-bus Indian system.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Electrical Sustainable EnergyIntelligent Electrical Power Grid
Morphometric study of proximal femur in fractured and non-fractured post menopausal women
No full textObjective: This study was conducted to investigate the risk of hip fracture using proximal femoral morphometry in fractured and nonfractured postmenopausal women.Methods: We conducted an observational cross-sectional study with 138 postmenopausal women (49 fractured and 89 nonfractured). The hip axis length (HAL), femoral neck axis length (FNAL), acetabular width (AW), femoral head width (FHW), femoral shaft width (FSW), and femoral neck shaft angle (FNSA) were measured in all cases by dual energy X-ray absorptiometry. We also studied the correlation between body mass index (BMI) with all the parameters in fractured and control groups.Results: The mean age, height, weight, and BMI were 61.24±3.23, 163.94±7.84 cm, 71.88±9.14 kg, and 26.72±2.78 kg/m², respectively, in fractured patients. In nonfractured patients the values were 59.73±5.32, 161.73±4.25 cm, 69.54±6.25 kg, and 26.74±2.23 kg/m² respectively. The mean HAL, FNAL, AW, FHW, FSW, and FNSA were 130.5±3.18 mm, 111.26±3.64 mm, 18.2±1.91 mm, 53.46±1.51 mm, 37.45±1.82 mm, and 132.76±3.15 degree incase group and 130.84±4.74 mm, 112.48±4.08 mm, 17.57±2.32 mm, 53.4±1.86 mm, 35.29±1.82 mm, and 128.76±3.6° in control group, respectively.Conclusion: The femoral parameters such as HAL, FNAL, AW, and FHW do not indicate any correlation between fractured and control groups, whereas FSW and FNSA were significantly higher in case group. The FNSA was having significant negative correlation with BMI in fractured group while that was having a significant positive correlation in the nonfractured group. This observation will be helpful in exploration of its clinical significance in proximal femoral fracture.Keywords: Proximal femur, Morphometry, Postmenopausal, Fracture.</jats:p
Perceptions and practices of various maternal and child health services: a study among women of reproductive age group in a costal block of Ganjam District, Odisha
No full textBackground: “Healthy mothers - Healthy children” and “children’s health - tomorrows health”. Any intervention which should be planned towards the upliftment of health status of this group must start with gathering information about their present status especially in the underprivileged section. This study was conducted with an objective to assess perceptions and practices of various Maternal and Health services in the study group.Methods: An observational, cross-sectional study was conducted among women in reproductive age group residing in villages of a coastal block with a predesigned and pretested questionnaire.Results: Among the study population 54.7% women were in the 25-34 years age group, majority (46.7%) were illiterate and one-fourth of the study population age at marriage was below 18 years. Though 90.7% of study population were aware of the ongoing contraceptive practises only 37.4% of the respondents accepted some or other contraceptive methods. Fear of side effects (35.4%) found to be the chief reasons for unwillingness for adopting contraception. Majority (90.2%) responded that pregnant women need to go for ANC but only 51.9% knew correctly about minimum number of ANC. Women having adequate knowledge on ANC was found to be significantly associated with their educational status and age at marriage. Among PNC mothers 57.6% had completed the requisite no. of ANC and only 30% of respondents had completed the course of iron and folic acid tablet during their last pregnancy.Conclusions: The literacy status of the study population has to be improved which will lead to demand generation and utilization of the health and other services provided by the Government.</jats:p
Scalar Dark Matter and Radiative Dirac neutrino mass in an extended model
No full textWe explore a gauged extension of standard model with inclusion
of three right-handed neutrinos of exotic charges to cancel the gauge
anomaly. Non-trivial transformation of new particles under symmetry
forbids the neutrino mass at tree level and hence a small Dirac mass can be
generated radiatively at one loop with a doublet fermion and singlet scalar. We
also discuss the phenomenology of a scalar dark matter, which can be obtained
from the mixing of neutral CP even component of a doublet and real singlet
scalar. An adhoc symmetry is required in the current framework to
stabilize the dark matter candidate. Presence of new particles with odd
charges and small mass splitting, makes the phenomenology more interesting by
governing the relic density with co-annihilation processes. We explore the
spin-independent direct detection constraints on dark matter via the scalar
mediation. The new particle spectrum not only opens up new window for dark
matter study but also satisfy the constraints from lepton flavor violating
decay of .Comment: 19 pages, 18 figure
COVID 19 fatalities burden in Asian countries: An analysis of pattern and determinants
No full textCovid 19 pandemic has severe implications on health and life of people. Asia being the most populous region has higher fatalities burden. Health infrastructure, stringent preventive measures by the government and public participation through adhering to social distancing have influence to check on fatalities' burden. The level of Social capital as well as voters' participation in a particular country can have influence on containment of COVID cases and fatalities. In this context, the main objectives of this study are to analyse pattern and trend of death burden for 45 Asian countries and impact of stringency measures by government, and voters’ turnout ratio on death burden. However, for regression analysis only 32 countries are taken into account considering the availability of data for all variables. Multiple linear regression analysis is employed in a cross-sectional framework and Ordinary least square estimation technique with heteroscedastic adjusted standard errors have been used for estimation of coefficients. The results show that southern Asia contributes the highest share of fatality cases in total fatality cases of Asia with 71.43% share. It also has the highest share of confirmed cases in total confirmed cases of Asia with 71.72%. However, when we take the population into account, Western Asia leads in the share of confirmed COVID-19 cases and its associated fatality cases per million populations in Asia as compared to other Asian regions. The factors like health infrastructure and voters’ turnover ratio are found to be significant and potential in reducing the new deaths per million populations. Though the coefficient of Stringency index has been negative and it did not emerge to be significant in Asian countries. The COVID related fatalities in Asian region are urban centric and urbanization proxy is found to be positive and significant. Diabetes prevalence rate has some heterogeneous result and in the present study its coefficient is not in the hypothesized direction. . The Countries should ramp up health infrastructure and necessary preparedness to deal with the subsequent waves and COVID related fatalities. Importance need to be given people's participation and their shared responsibilities in dealing with COVID cases and checking on fatalities. The realisation of social responsibility among the masses can lead to community participation and adhering to the protocols imposed by the government and helps in checking on spread of virus and associated death
Studies on Assessment of Ground Water Pollution Vulnerability Index for CUTM Campus Paralakhemundi, Odisha through Application of “DRASTIC” Model
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