The enhanced YSO population in Serpens

The Serpens Molecular Cloud is one of the most active sites of ongoing star formation at a distance of about 300 pc, and hence is very well-suited for studies of young low-mass stars and sub-stellar objects. In this paper, for the Serpens star forming region, we find potential members of the Young Stellar Objects population from the Gaia DR3 data and study their kinematics and distribution. We compile a catalog of 656 YSOs from available catalogs ranging from X-ray to the infrared. We use this as a reference set and cross-match it to find 87 Gaia DR3 member stars to produce a control sample with revised parameters. We queried the DR3 catalog with these parameters and found 1196 stars. We then applied three different density-based machine learning algorithms (DBSCAN, OPTICS and HDBSCAN) to this sample and found potential YSOs. The three clustering algorithms identified a common set of 822 YSO members from Gaia DR3 in this region. We also classified these objects using 2MASS and WISE data to study their distribution and the progress of star formation in Serpens.Comment: Accepted in Journal of Astrophysics and Astronomy (JoAA

Missed opportunities for family planning counselling among postpartum women in eleven counties in Kenya

Background: Mothers may access medical facilities for their babies and miss opportunities to access family planning (FP) services. This study was undertaken to describe missed opportunities for FP among women within the extended (0–11months) postpartum period from counties participating in Performance Monitoring and Accountability 2020 (PMA2020) surveys. Design and setting: This study analysed cross-sectional household survey data from 11 counties in Kenya between 2014 and 2018. PMA2020 uses questions extracted from the Demographic and Health survey (DHS) and DHS defnitions were used. Multivariable logistic regression was used for inferential statistics with p-value of \u3c0.05 considered to be signifcant. Participants: Women aged 15-49 years from the households visited. Primary outcome measure: Missed opportunity for family planning/contraceptives (FP/C) counselling. Results: Of the 34,832 women aged 15-49 years interviewed, 10.9% (3803) and 10.8% (3746) were in the period 0–11months and 12–23months postpartum respectively, of whom, 38.8 and 39.6% respectively had their previous pregnancy unintended. Overall, 50.4% of women 0-23months postpartum had missed opportunities for FP/C counselling. Among women who had contact with health care at the facility, 39.2% of women 0-11months and 44.7% of women 12-23months had missed opportunities for FP/C counselling. Less than half of the women 0-11months postpartum (46.5%) and 64.5% of women 12 – 23months postpartum were using highly efcacious methods. About 27 and 18% of the women 0-11months and 12 – 23months postpartum respectively had unmet need for FP/C. Multivariable analysis showed that being low parity and being from the low wealth quintile signifcantly increased the odds of missed opportunities for FP/C counselling among women in the extended postpartum period, p\u3c0.05. Conclusions: A large proportion of women have missed opportunities for FP/C counselling within 2 years postpartum. Programs should address these missed opportunities

Thermal–electrical–hydraulic properties of Al2O3–SiO2 hybrid nanofluids for advanced PEM fuel cell thermal management

Hybrid nanofluid is a new revolutionized cooling liquid with improved thermo-physical properties as compared to conventional coolant. This paper presents the feasibility of hybrid Al2O3–SiO2 nanofluids as an advanced coolant for PEM fuel cell application in terms of thermal–electrical–hydraulic thermo-physical properties. Nine mixture ratios of Al2O3–SiO2 were used in this experiment, ranging from 10:90 to 90:10 mixture ratios. The result demonstrated that both thermal conductivity and electrical conductivity decreased as the percentage of Al2O3 was increased in the mixture. In contrast, the dynamic viscosity property increased as the Al2O3 percentage ratio was increased. In summary, property enhancement ratio (PER) of thermo-hydraulic (PERt/v) and thermo-electrical (PERt/e) was established. Both PERt/v and PERt/e analyses favor 10:90 ratio of Al2O3–SiO2 hybrid as the most feasible ratio for the implementation in PEMFC. This is due to the dominant effect of thermal over viscosity and electrical conductivity

Human cyclin T1 expression ameliorates a T-cell-specific transcriptional limitation for HIV in transgenic rats, but is not sufficient for a spreading infection of prototypic R5 HIV-1 strains ex vivo

<p>Abstract</p> <p>Background</p> <p>Cells derived from native rodents have limits at distinct steps of HIV replication. Rat primary CD4 T-cells, but not macrophages, display a profound transcriptional deficit that is ameliorated by transient trans-complementation with the human Tat-interacting protein Cyclin T1 (hCycT1).</p> <p>Results</p> <p>Here, we generated transgenic rats that selectively express hCycT1 in CD4 T-cells and macrophages. hCycT1 expression in rat T-cells boosted early HIV gene expression to levels approaching those in infected primary human T-cells. hCycT1 expression was necessary, but not sufficient, to enhance HIV transcription in T-cells from individual transgenic animals, indicating that endogenous cellular factors are critical co-regulators of HIV gene expression in rats. T-cells from hCD4/hCCR5/hCycT1-transgenic rats did not support productive infection of prototypic wild-type R5 HIV-1 strains <it>ex vivo</it>, suggesting one or more significant limitation in the late phase of the replication cycle in this primary rodent cell type. Remarkably, we identify a replication-competent HIV-1 GFP reporter strain (R7/3 YU-2 Env) that displays characteristics of a spreading, primarily cell-to-cell-mediated infection in primary T-cells from hCD4/hCCR5-transgenic rats. Moreover, the replication of this recombinant HIV-1 strain was significantly enhanced by hCycT1 transgenesis. The viral determinants of this so far unique replicative ability are currently unknown.</p> <p>Conclusion</p> <p>Thus, hCycT1 expression is beneficial to <it>de novo </it>HIV infection in a transgenic rat model, but additional genetic manipulations of the host or virus are required to achieve full permissivity.</p

Volumetric and viscometric behavior of the binary system: (Hexan-1-ol + p -Xylene)

金沢大学理工研究域物質化学系Densities and viscosities for the binary mixtures of hexan-1-ol with p-xylene have been measured at a number of mole fractions at T = (303.15, 313.15, and 323.15) K. The excess molar volumes and viscosity deviations have been calculated from the experimental results and have been fitted to the Redlich-Kister polynomial equation. © 2010 American Chemical Society

Erratum: Density and viscosity of the binary mixtures of hexan-1-ol with isomeric xylenes at T = (308.15 and 318.15) K and atmospheric pressure

金沢大学理工研究域物質化学系Densities and viscosities of binary liquid mixtures of hexan-1-ol + o-xylene, + m-xylene, or + p-xylene were measured at a number of mole fractions at T = (308.15 and 318.15) K and atmospheric pressure. The excess volumes and the viscosity deviations from the mole fraction average were calculated from the experimental density and viscosity data. The experimental data were correlated with Redlich-Kister equation. Variations in the calculated excess and deviation properties for the liquid mixtures were studied in terms of intermolecular interactions. © 2010 American Chemical Society

Biochemical Analysis on Blood and Crop Contents of Household Chickens Along With Their Production and Health Status in Bangladesh

This study aimed to assess the biochemical parameters of household chickens at crop and blood levels and measure the body weight. For this purpose, 350 Deshi (local) and 27 Fayoumi day old chicks were reared in 2 separate brooders within a house for 15 days. Body weight, serum total protein and calcium levels of these chicks were evaluated on day 0 and 15. After control house trial, birds were distributed among the selected households. Again, body weights and certain biochemical parameters were assessed from randomly selected birds at 60, 120 and 180 days of age. Fayoumi birds gained higher weight (P<0.001) than at control trial, whereas Deshi birds attained better weight (P<0.001) at household. Crop contents were dominated by carbohydrate. The level of crude proteins and calcium in crop contents increased along with age regardless of bird types. The average phosphorous in the crop contents was 0.3% (60 days), 2.6% (120) and 0.7% (180) regardless of bird types. Both serum total protein (P<0.05) and calcium (P<0.05) were significantly difference in between bird types at control house study. In conclusion, Deshi birds attained higher weight at household. The crude protein was below standard. Calcium and Phosphorous levels in the crop contents varied with ages, regardless of bird types

Effects of Indole-3-Butyric Acid (IBA) and rooting media on rooting and survival of air layered wax apple (Syzygium samarangense) CV Jambu Madu

The wax apple or jambu madu, is a non-climacteric tropical fruit from Myrtaceae family and widely cultivated in South East Asia. The limited availability of good quality seedlings of wax apple is the main problem to development of flourish it’s market share in the current fruit industry. Therefore, in order to produce good quality planting materials, a study aimed at optimizing propagation and adventitious rooting technique and survivability of wax apple air layer was conducted. In this study, four different levels of Indole-3-Butyric Acid (IBA) concentration (0, 1000, 1500 and 2000 mg L-1) and three rooting media (sphagnum moss, vermicompost and garden soil) were applied after removal of bark (phloem) on the shoot to determine the effect on rooting and survivability of the wax apple air layer under field conditions. The results showed that the wax apple shoots treated with 2000 mg L-1 IBA produced the significantly higher number of roots, increased length of root, diameter of branch, length of branch, number of leaf and leaf area of air layers. In addition, the highest chlorophyll content and stomatal aperture were recorded in 2000 mg L-1 IBA treatment compared to other treatments including control. Vermicompost medium was better than garden soil and sphagnum moss in respect of rooting and survivability of air layers. The results showed that the combination of 2000 mg L-1 IBA and vermicompost as rooting media give the best combination to root initiation, root number, root length and survival rate (100%) of wax apple air layers. From this study, it can be concluded that 2000 mg L-1 IBA and vermicompost treatment enhance the root initiation, early establishment and survivability of wax apple air layered under field conditions