Useful yields from resonance ionization mass spectrometry can be extremely high compared to other mass spectrometry techniques, but uranium analysis shows strong matrix effects arising from the tendency of uranium to form strongly bound oxide molecules that do not dissociate appreciably on energetic ion bombardment. We demonstrate a useful yield of 24% for metallic uranium. Modeling the laser ionization and ion transmission processes shows that the high useful yield is attributable to a high ion fraction achieved by resonance ionization. We quantify the reduction of uranium oxide surface layers by Ar and Ga sputtering. The useful yield for uranium atoms from a uranium dioxide matrix is 0.4% and rises to 2% when the surface is in sputter equilibrium with the ion beam. The lower useful yield from the oxide is almost entirely due to uranium oxide molecules reducing the neutral atom content of the sputtered flux. We demonstrate rapid isotopic analysis of solid uranium oxide at a precision of <0.5% relative standard deviation using relatively broadband lasers to mitigate spectroscopic fractionation.
Background: First-time mothers may experience postnatal depression and a lack of social support, affecting their life satisfaction. However, there is a lack of studies investigating the application of guided antenatal education support programs to deal with such issues.Purpose: The study aimed to evaluate the effects of guided antenatal education support programs on postnatal depression, social support, and life satisfaction among first-time mothers.Methods: This quasi-experimental study involved a total of 72 first-time mothers. Convenience sampling was applied for participant selection, and no randomization was used. The participants were equally divided into the intervention group and the control group. A self-administrated questionnaire was used for data collection during the antenatal period (pretest) and six weeks postpartum (posttest). The risk of postnatal depression was assessed using the Edinburgh Postnatal Depression Scale (EPDS). In addition, the Multidimensional Scale of Perceived Social Support (MSPSS) and the Satisfaction with Life Scale (SWLS) were used to assess social support, and life satisfaction, respectively. The intervention group received a guided antenatal education support program, consisting of antenatal education sessions plus an extra 15-minute discussion and a support guidebook. The data were analyzed using a paired t-test and an independent t-test.Results: There was a significant reduction in the risk of postnatal depression score in the intervention group (p<0.05) after receiving the guided antenatal education compared to the control group. Also, there was a significant increment of life satisfaction score (p<0.05) and social support score (p<0.05) after receiving guided antenatal education in the intervention group.Conclusion: The guided antenatal education support is beneficial to reduce postnatal depression and increase life satisfaction and social support. Nurses and midwives should provide an integration of psychoeducation for first-time mothers, especially during pregnancy.
Cell lines and patient-derived xenografts are essential to cancer research, however, the results derived from such models often lack clinical translatability, as these models do not fully recapitulate the complex cancer biology. It is critically important to better understand the systematic differences between cell lines, xenografts and clinical tumors, and to be able to identify pre-clinical models that sufficiently resemble the biological characteristics of clinical tumors across different cancers. On another side, direct comparison of transcriptional profiles from pre-clinical models and clinical tumors is infeasible due to the mixture of technical artifacts and inherent biological signals. To address these challenges, we developed MOBER, Multi-Origin Batch Effect Remover method, to simultaneously extract biologically meaningful embeddings and remove batch effects from transcriptomic datasets of different origin. MOBER consists of two neural networks: conditional variational autoencoder and source discriminator neural network that is trained in adversarial fashion. We applied MOBER on transcriptional profiles from 932 cancer cell lines, 434 patient-derived tumor xenografts and 11159 clinical tumors and identified pre-clinical models with greatest transcriptional fidelity to clinical tumors, and models that are transcriptionally unrepresentative of their respective clinical tumors. MOBER can conserve the biological signals from the original datasets, while generating embeddings that do not encode confounder information. In addition, it allows for transformation of transcriptional profiles of pre-clinical models to resemble the ones of clinical tumors, and therefore can be used to improve the clinical translation of insights gained from pre-clinical models. As a batch effect removal method, MOBER can be applied widely to transcriptomics datasets of different origin, allowing for integration of multiple datasets simultaneously.
Nursing students are reported to have moderate to high test anxiety, leading to reduced academic performance, poor self-esteem, and failure to complete the program and practice nursing. This review aims to examine the interventions for test anxiety reduction in nursing students. Following the PRISMA guidelines, peer-reviewed experimental studies published in English between 2016 and 2021 from four databases, EBSCOhost, PubMed, Science Direct, and Scopus, were systematically searched. The findings were presented in tabular and narrative form. Among the 722 studies retrieved, 14 selected studies were critically appraised, guided by the Joanna Briggs checklist for Randomized Controlled Trials and the checklist for Quasi-Experimental Studies, resulting in 11 studies for inclusion in the systematic review. Test anxiety was assessed by different scales. Aromatherapy hand massage, aromatherapy using a diffuser in combination with music therapy, confidence training for test relaxation, coping program, music therapy, emotional freedom technique, animal-assisted intervention, and guided imagery were all found to be effective in reducing test anxiety. In conclusion, while numerous interventions to reduce test anxiety in nursing students were found to be effective, the quality of the studies investigating these interventions was varied with generally small sample sizes and limited follow-up. Future research should be conducted, and the same interventions should be carried out using a larger sample size to strengthen the body of evidence.
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