bluuebunny/crossref_metadata_2025_split huggingface dataset:
Association Vitamin D2 and PFAS among pregnant women from NHANES 2017-2018: A case Control Analysis
Authors: Ripon Rezaul Karim 
Published: October 2024

Abstract

Introduction: This study uses data from the 2017-2018 NHANES survey to evaluate how exposure to perfluoroalkyl substances (PFAS) affects vitamin D2 levels in pregnant women. PFAS are widely known for their environmental persistence and potential health risks, particularly during pregnancy, as they affect important biological functions such as the metabolism of vitamin D2, which is essential for bone health and immune function.
Methods: The study focused on pregnant women from the NHANES 2017-2018 cohort, using “comment code LBDVD2LC – 25OHD2” to classify vitamin D2 levels and different PFAS as exposure variables. Data analysis was carried out with R to address the complicated design of the NHANES survey. To explore associations, weighted descriptive statistics, bivariate analyzes and logistic regression were used.
Results: The analysis found that most participants had vitamin D2 levels below the detection limit. PFAS exposure and reduced vitamin D2 levels were remarkably correlated. A significant association was found between increased exposure to PFAS and decreased vitamin D2 levels (p values <0.001), indicating that exposed pregnant women have low vitamin D2 levels.
Conclusion: This study highlights the negative effects of PFAS exposure on vitamin D2 levels in pregnant women, helping to understand PFAS as an important risk factor during pregnancy. The goal of future studies should be to clarify specific biochemical interactions and suggest feasible public health plans to reduce this exposure.
Hydrothermal Synthesis of Tungsten Oxide Photo/electrocatalysts: Precursor-Driven Morphological Tailoring and Electrochemical Performance for Hydrogen Evolution and Oxygen Reduction Reaction Application
Authors: Sarma Rahul , Kakati Biraj Kumar 
Published: October 2024

Abstract

This research examines the effective use of two specific precursor i.e Hydrochloric acid and Oxalic acid used in the synthesis of Tungsten oxide (WO3). Catalytic reactions including Oxygen Reduction Reaction (ORR) and Hydrogen Evolution Reaction (HER) was investigated with the synthesised material. The morphological as well as electrochemical characteristics were studied using Field Emission Scanning Electron Microscope (FESEM), X-ray Diffraction (XRD), Energy-Dispersive X-ray spectroscopy (EDX), UV spectroscopy along with electrochemical analysis. It is being found that the WO3 synthesised with oxalic acid (WO3-ox) demonstrated in superior HER catalysis, whereas the other variant (WO3 with HCl (WO3-h)) showed better ORR performance. An optical bandgap of 2.638 eV was obtained for WO3-ox. Moreover, electrochemical analysis revealed an ORR peak at 0.52 V for WO3-h, in acidic media of electrolyte. As a result of which the two electrocatalyst were utilised in two different applications. WO3-ox was used for Methylene Blue (MB) degradation under the UV light and WO3-h was incorporated as a cathode catalyst for electricity generation and wastewater treatment in Microbial Fuel Cell (MFC). A degradation efficiency of 83.9% was attained in a span of 3 hours. On the other hand, MFC showed superior electrical power density of 209.72 mW/m2 with catalyst as compared to bare carbon cloth electrode (139.78 mW/m2). The chemical oxygen demand (COD) removal efficiency, which acts as a measure of wastewater treatment was 1.47 folds higher with the MFC having the catalyst. Thus, by tailored modulation of synthesised material with different precursor can lead to optimization of its features for various applications like degradation of methylene blue and microbial fuel cell.
Exploring the influencing factors of sleep quality among ICU Nurses：a cross-sectional latent profile analysis
Authors: Li Lili , Yao Huiping , Li Fei , Xu Qiuwen , Hua Jiali , Zhang Ying , Wu Jing 
Published: October 2024

Abstract

Objective This study aims to identify the potential classifications of sleep disturbances within the ICU nurse population, and to compare the between-group differences in demographic data and sleep characteristics.Methods Through convenience sampling, ICU nurses from three tertiary A-level hospitals in China were selected as research subjects from March to May 2024. A survey was conducted using a demographic data questionnaire, the PSQI scale, the DASS-21 scale, and the BPS scale, and the data on the sleep quality of ICU nurses was collected via electronic questionnaires. This research also utilized latent class analysis to examine the symptomatic traits of sleep quality in ICU nurses. Additionally, it applied univariate analysis and unordered multinomial logistic regression models to determine the factors influencing the various categories of their sleep quality.Results A total of 545 questionnaires were distributed, of which 522 were validly returned, yielding an effective response rate of 95.7%. Four potential sleep quality profiles were identified, including "high sleep quality - no sleeping pills," "medium sleep quality - low sleeping pills," "medium sleep quality - medium sleeping pills," and "low sleep quality - high sleeping pills," with proportions of 43.7%, 40.6%, 10.5%, and 5.2%, respectively. Unordered multinomial logistic regression analysis indicated that the number of night shifts per week, marital status, BPS scores, FSS scores, and DASS-21 scores were key factors affecting the sleep quality classification of ICU nurses(P < 0.05).Conclusion The sleep quality characteristics of ICU nurses are diverse and can be divided into four different categories. Therefore, nursing managers should be aware of this heterogeneity and take corresponding intervention measures based on the classification of nurses to ensure their sleep quality and promote psychological health.
“What other option did I have?” – The effect of conflict and displacement on child marriage and early childbearing among displaced Rohingya adolescents
Authors: Mieth Kate , Hasan Tahia , Chakrabarty Adrija , Lee Kenna , Kaiser Adrita , Hasan Tanvir , Elnakib Shatha , Jackson Caitlin , Robinson W. Courtland , Zimmerman Linnea A 
Published: October 2024

Abstract

Background. Humanitarian emergencies are postulated to increase rates of early marriage and early childbearing, as drivers of both are heightened or exacerbated in crisis settings. There is a critical need for research that explores the causal mechanisms that motivate family formation, i.e. the process from marriage into childbearing, and how this process is affected by conflict and displacement.
Objective. This paper aims to describe how displacement and living within a camp context has affected trends, norms, and drivers around family formation, focusing on the lived experience of female and male adolescents and young adults aged 15-24.
Methods. We coded and analyzed qualitative data from forty-nine in-depth interviews and sixteen focus group discussions conducted with Forcibly Displaced Myanmar Nationals aged 15-24 who arrived in Cox’s Bazar during or after October 2016.
Results. Participants agreed that rates of child marriage have increased post-conflict and displacement and generally attributed this increase to a variety of drivers, including fears around protection, socioeconomic need, lack of education and/or employment opportunities, and a perceived loosening of restrictions around legal age of marriage within camp. While some of these are pre-existing drivers exacerbated by conflict and displacement, others are new drivers that have developed as a result. The ways that adolescents experienced each driver were also highly gendered. Conversely, conflict and displacement had seemingly little effect on cultural expectations to demonstrate fecundity immediately after marriage. Finally, participants felt that adverse living conditions within camp have significantly lowered fertility intentions and have increased adoption of family planning.
Conclusions. Our results demonstrate that many Rohingya families currently view child marriage more as a practical tool to overcome challenges associated with being displaced, and early childbearing as an inevitable natural consequence of child marriage. The Bangladeshi government must ease restrictions on educational and livelihood opportunities for both adolescent girls and boys, who otherwise have no alternatives to child marriage, and few other opportunities to thrive and productively contribute to their communities.
Psychosexual Health’s Impact on NSSI：Chain Mediation of Adult Attachment and Social Supports
Authors: GAO Ping , ZHANG Yuqing , ZHAO Mei 
Published: October 2024

Abstract

This study utilizes the psychosexual health development (PSYCHOSEXUAL HEALTH), adult attachment scale (AAS), social supports rating scale (SSRS), and non-suicidal self-injury (NSSI) severity rating scales for clinicians’ questionnaires. The study explores the correlation between PSYCHOSEXUAL HEALTH and NSSI and the chained mediating roles of AAS and SSRS. We employed SPSS Windows software version 26.0 for relevant analysis and Amos for structural equation model analysis with Bootstrap mediating effects. The results indicate that PSYCHOSEXUAL HEALTH is closely correlated with AAS and SSRS, and can negatively predict NSSI behaviors. PSYCHOSEXUAL HEALTH can negatively predict NSSI under the mediating effect of SSRS. PSYCHOSEXUAL HEALTH can negatively predict NSSI through the mediating roles of AAS and SSRS. AAS has a full mediating effect, whereas SSRS has a partial mediating effect. Therefore, we conclude that PSYCHOSEXUAL HEALTH development is crucial to NSSI behaviors. Based on the conclusion, we discussed the future research direction to better develop secure AAS and high-quality SSRS through school education and guidance. This study provides a scientific theoretical basis for implementing PSYCHOSEXUAL HEALTH education and NSSI prevention efforts to reduce the occurrence rate and enhance school group interventions.
A Trackless Auxiliary Transportation Robot System for Unmanned Material Distribution of Underground Coal Mine
Authors: Hao Mingrui , Yuan Xiaoming , Ren Jie , Bi Yueqi , Ji Xiaodong , Zhao Sihai , Wu Miao 
Published: October 2024

Abstract

Response to the current situation of backward automation level, heavy labor intensity and high accident rate in underground coal mine auxiliary transportation system, the trackless auxiliary transportation robot system (MTATBOTS) is presented in the paper. The robot is specially designed for long-range, space-constrained and explosion-proof underground coal mine environment. With onboard perception and autopilot system, the robot can perform automated and unmanned subterranean material transportation. The paper proposes an integrated-odometry-based method to improve position estimation and mitigate location ambiguities for simultaneous localization and mapping (SLAM) in large-scale, GNSS-denied and perceptually-degraded subterranean transport roadway scenario. Additionally, the paper analyzes the robot dynamic model and presents the nonlinear control strategy for the robot to autonomously tack a planned trajectory based on the path-following error dynamic model. Finally, the proposed algorithm and control strategy are tested and validated in a virtual underground transport roadway environment relying on the simulation model of the robot system. The test result indicates that the proposed algorithm can obtain more accurate and robust robot odometry and better underground roadway mapping result compared with other SLAM solutions.
WITHDRAWN: An accurate interpolation-based iterative frequency estimator of 2D multi- frequency sinusoids
Authors: Peng Yuqin , Tu Yaqing , Mou Zelong , Yang Huiyue 
Published: October 2024

Abstract

The full text of this preprint has been withdrawn, as it was submitted in error. Therefore, the authors do not wish this work to be cited as a reference. Questions should be directed to the corresponding author.
Digital support for female students in physical education universities in Japan
Authors: Okuyama Junko , Seto Shuji , Motokawa Tomonori , Kato Tomomi , Miyamoto Aya , Maekawa Maki , Funakoshi Shunichi , Okazaki Tatsuma , Ebihara Satoru 
Published: October 2024

Abstract

At the age of university students, it is important to accomplish the developmental tasks of adolescents. Furthermore, in addition to acquiring specialized knowledge and accomplishing developmental tasks, athletic colleges also require young athletes to be active. Therefore, we decided to investigate the use of a smartphone application, me-fullness® as an unprecedented method of support for female college students currently enrolled in athletic colleges. We conducted a psychological survey of female university students at the International Pacific University in Okayama, Japan, before and after one month of use of a me-fullness® app (N = 125) and a group of non-users (N = 85). The app-using group showed significant improvement in depressive symptoms, anxiety symptoms and stress scores as indicated by the Depression, Anxiety and Stress Scale − 21 Items (DASS-21), as well as insomnia, Premenstrual Syndrome (PMS) and resilience scores, while the non-app-using group showed improvement in anxiety and resilience (by Wilcoxon signed-rank test). This study suggests that use of the me-fullness app may have improved depression, stress, insomnia, and resilience. We hope that this study will lead to better college life and sports performance for female students in athletic universities and colleges.
Integrated metabolome and transcriptome analysis provides clues to fruit color formation of yellow, orange, and red bell pepper
Authors: Xue Qiqin , Zhang Qingxia , Zhang Aiai , Li Da , Liu Yongguang , Xu Haicheng , Yang Qinghua , Liu Fengyan , Han Tongyao , Tang Xiaozhen , Zhang Xiurong 
Published: October 2024

Abstract

Fruit color is a crucial trait for bell pepper. To investigate the mechanism of color formation, three bell pepper lines with different color (yellow, orange and red) were used as materials to conduct comprehensive targeted metabolomic and transcriptomic analyses. During the process of fruit development, 54 carotenoids metabolites were discovered, exhibiting unique accumulation patterns and notable variety specificity. The types and content of carotenoids in orange fruit (OM) were notably greater compared to the other two varieties. Red pigment (capsanthin and capsorubin) was specifically enriched in red fruit (RM), and yellow pigment (lutein and zeaxanthin) is the highest in yellow fruit (YM) and OM. Five modules positively correlated with carotenoid accumulation and one negative module was determined by weighted gene co-expression network analysis (WGCNA). Additionally, transcription factors (TFs) and hub genes related to carotenoid synthesis were predicted. By elucidating the regulation of 7 key carotenoid metabolites by 14 critical genes, we constructed a comprehensive carotenoid biosynthesis metabolic network that comprehensively explains the pigment changes observed in green and mature pepper fruit. Overall, the results not only provide important insights into carotenoid synthesis pathway, but also lay a solid base for revealing the mechanism of bell pepper color transformation.
Utilization of Agricultural wastes as biochar’s and pozzolanic ashes in cementitious blends
Authors: Commeh Michael , Thiedeitz Mareike , Acheampong Benedict , Ashley Nkansah Nana Kwame , Gafah Godsway , Tsitsi Joshua Mawuli , Acheampong Seth , Tsekpo Edmond , Ess Rosemond Nyamewaa Van , Barnor-Arthur Jason Okyeremah 
Published: October 2024

Abstract

Agricultural activities tend to produce a lot of waste in their operation. These wastes, if not properly disposed of, cause environmental pollution. This agricultural waste (biomass) can be utilized into valuable materials like rice husk ash (RHA) and biochar. Ordinary Portland Cement (OPC) is the primary binder in standard cementitious mixes and a significant contributor to CO2 emissions. This study investigates the utilization of RHA and biochar as supplementary cementitious materials to minimize the need for OPC. This research adopts pyrolysis and controlled combustion to convert rich husk (agricultural waste) to produce RHA and biochar. In order to establish RHA and Biochar's suitability as SCM, chemical composition techniques (X-Ray Diffraction analysis, X-Ray Fluorescence analysis, and Ultrasonic Pulse Velocity test) and mechanical performance testing (compressive strength tests of various mortar mixes with varied percentages (0%, 5%, 10%, and 15%) replacement of RHA and Biochar by weight of cement) were conducted. The findings showcased that partially replacing OPC with RHA and biochar in cementitious mixes improves mechanical performance and durability while maintaining a lower carbon footprint. Utilization of agricultural waste in cementitious materials encourages efficient circular economy principles as well as environmentally sustainable infrastructure. This study highlights how using bio renewable resources can lead to sustainable development.
New record of Vallisneria americana Michx. in the transitional zone in the Usumacinta river system
Authors: Sánchez Alberto J. , Florido Rosa , Hernández-Trejo Humberto , Álvarez-Pliego Nicolás , Salcedo Miguel Ángel , Barba Everardo 
Published: October 2024

Abstract

Vallisneria americana is a submersed rooted macrophyte with ample geographic distribution in North America, which as a structured habitat, shelters high biodiversity of aquatic fauna and helps to sink Carbon. However, their populations have drastically decreased or disappeared in the free-flowing Usumacinta river system. Physico-chemical parameters in water, measurements of quantitative habitat complexity, and records of the fish collected were quantified in the unique path of V. americana. This patch of 4 m 2 registered a low average density (96 ∓ 48 stems/m 2), 61.7 ∓ 0.9 g ash free dry weight /m 2 of biomass, and 192 ∓ 42.3 masculine inflorescences/m 2. Six fish species of the Poecillid and Cichlid families were caught, with an average density of 19 ∓ 1.9 fish/m 2 , all of them less than 6.3 cm of standard length. This first record of V. americana in the transitional longitudinal zone (20-60 MASL) of the Usumacinta river system strengthens the relevance of the Wanhá Biosphere Reserve, as it was mainly decreed for their records of relictual inland of red mangrove populations, and high diversity of tropical swamp woody communities. Moreover, the American eelgrass patch represents a nursery area for at least six native fish of Poeciliids and Cichlids, which are the two more diverse fish families in Middle America. Moreover, Cichlid´s fishery is a relevant component to environmental sustainability.
The myeloid SRC family kinase HCK regulates breast cancer growth by activating tumor-associated macrophage-led invasion and inhibiting cytotoxic T cell activity
Authors: Murrey Michael W. , Poh Ashleigh R. , Steer James H. , Rinaldi Catherine , Mouchemore Kellie A. , Dwyer Amy R. , Denisenko Elena , Kuznetsova Irina , Yeow Yen , Jones Matthew E. , Hmon Khaing P. , Muiri Daithi O , Liu Ya-Yu , Lin Weitao , Forrest Alistair R.R. , Ellies Lesley G. , Joyce David A. , Ernst Matthias , Pixley Fiona J. 
Published: October 2024

Abstract

The normal developmental and homeostatic roles of tissue resident macrophages are subverted in tumor-associated macrophages to promote tumor progression. Pro-tumoral macrophage activities include immune evasion and promotion of invasion and metastasis. We show that both activities are regulated by the myeloid Src family kinase HCK, which drives macrophage motility and invasive capacity. Loss of HCK reduced the growth of the aggressively invasive Py8119 mammary tumor by 70–80% while excessive HCK activity increased tumor growth. Consistent with a role for HCK in regulating macrophage invasiveness, plasma membrane-associated Src family kinase activity at the tumor margins was lost in the absence of HCK. Additionally, tumors from HCK-deficient hosts contained increased CD8+ T cell numbers and CD8+ T cell depletion reduced survival of tumor-bearing mice. However, CD8+ T cell-depleted HCK-deficient mice continued to show a significant survival advantage over CD8+ T cell-replete control mice, confirming a T cell-independent role for HCK in the promotion of tumor invasion and metastasis. Single cell RNA sequencing confirmed that macrophages comprised more than 40% of tumor mass associated with CSF-1 and IL-34 secretion by Py8119 cells and that loss of HCK activity did not affect macrophage recruitment. Tumor-associated macrophages were clustered into 5 subtypes, immunoregulatory (Folr2high), inflammatory (H2-Aahigh), interferon-primed, angiogenic and tissue resident, and their relative proportions were not affected by HCK activity. Thus, HCK regulates macrophage invasive capacity and cytotoxic T cell numbers but not macrophage numbers or their subtype distribution to drive Py8119 tumor growth.
Optimization of process parameters for ultrasonic-assisted laser welding of Ti6Al4V alloy and the impact of ultrasonic power on porosity, microstructure, and mechanical properties
Authors: chen yue , Liang Chongyi , Lin Haozhong , Tan Haoyuan , Zhang Longfei , Wei Wei , Zhou Jun 
Published: October 2024

Abstract

In this study, the optimization of welding parameters, pore defects, microstructure and mechanical properties of Ti6Al4V alloy welded joints subjected to ultrasonic-assisted laser welding were studied. The optimal parameter combination and the most significant factor influencing the tensile strength of the joint were determined by three-factor and three-level orthogonal experiments with range and variance analysis methods. A control experiment was set up under the optimal parameters to reveal the reason of ultrasonic influence on joint strength from the pore defects and microstructure. The control test showed that the cavitation effect and stirring effect of ultrasonic could significantly improve the weld defects and microstructure. Compared with no ultrasonic, the porosity of the welded joint decreased from 3.06% to 0.08%, and the average grain size of prior-β and α' martensite were refined by 15.1% and 6.7% respectively under an ultrasonic power of 1000W. The ultrasonic vibration also contributed to the grain boundary transformation from low-angle to high-angle and significantly reduced the residual stress inside the joint. With the increase of ultrasonic power, the tensile strength increased by 4.37% and 8.38% respectively and the fracture mode changed from brittle-ductile mixed fracture to ductile fracture.