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1.
West J Nurs Res ; 46(7): 517-524, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38822693

RESUMO

BACKGROUND: Postpartum depression (PPD) is highly prevalent and plagues a significant proportion of parents. Postpartum depression also exerts various negative consequences on infant development and parent-infant relationships. Social support is identified as an important factor influencing many parental predictors, and may affect the development of PPD. OBJECTIVE: This study aimed to investigate how perceived social support can indirectly influence PPD symptoms in parents at 6 months postpartum by influencing postpartum anxiety, parental satisfaction, and parental self-efficacy (PSE). METHODS: A secondary analysis of data from a randomized controlled trial was used with a cross-sectional exploratory design. A total of 400 Singaporean parents (200 couples) were included, and structural equation modeling was used to analyze the relationships between PPD and potential predictors. RESULTS: Findings revealed a less adequate fit between the hypothesized model and the data collected. Social support was found to be a significant predictor of postpartum anxiety, PSE, and parental satisfaction. Postpartum anxiety was a significant predictor of PPD, but PSE and parental satisfaction were not. CONCLUSION: This study provides an overview of how different parental predictors may be associated with PPD among Asian parents. Postpartum anxiety significantly predicted PPD, but social support had negative effects on postpartum anxiety, parenting satisfaction, and PSE. The findings provide further insight into how parents at risk of PPD can be identified and demonstrated how social support might negatively impact parental outcomes. More qualitative research with Asian parents is needed to further explain these findings and inform the development of future interventions.


Assuntos
Depressão Pós-Parto , Pais , Apoio Social , Humanos , Feminino , Depressão Pós-Parto/psicologia , Estudos Transversais , Adulto , Singapura , Pais/psicologia , Autoeficácia , Inquéritos e Questionários , Masculino , Poder Familiar/psicologia , Ansiedade/psicologia
2.
Ann Acad Med Singap ; 53(3): 142-151, 2024 Mar 27.
Artigo em Inglês | MEDLINE | ID: mdl-38920242

RESUMO

Introduction: Children from low-income (LI) families often suffer from poor health, with sub-optimal health practices. This cross-sectional study examined the differences in health habits and health-related quality of life (HRQoL) of LI preschool children compared to non-low-income preschool peers (PPG). Method: Using data from the social-health Circle of Care-Health Development Screening Programme (CoC-HDSP) in Singapore, 118 LI children and 304 PPG children aged 18 months to 6 years old and their families were recruited from 13 government-funded preschools. Health practices examined included screen time habits, sleep, nutrition, dental health and the children's HRQoL using PedsQL 4.0 Generic Core Scales. Results: Majority of the children were aged 4-6 years in kindergarten 1 and 2. There were more Malay children in the LI than the PPG (61.9% versus [vs] 29.3%, P<0.001). Low-income children were more likely to have lower-educated parents (P<0.001). The completed vaccination rate in the LI group was lower than those in PPG (84.7% vs 98.0%, P<0.001). More in the LI group utilised emergency services for acute illnesses (P<0.05). Fewer LI children had ever visited a dentist (47.4% vs 75.4%, P<0.001), and more LI children consumed sweetened drinks daily (33.3% vs 8.6%, P<0.001). The LI group reported poorer-quality sleep (48.3% vs 27.2%, P<0.001), though both groups exceeded the daily recommended screen viewing duration. The LI group scored higher in the social (mean 92.4±12.2 vs 84.3±15.3, P<0.001) and emotional (mean 85.2±15.1 vs 76.6±17.3, P<0.001) domains of the PedsQL 4.0 when compared to PPG. Conclusion: Low-income children have poorer health practices, receive less preventive paediatric care, and utilise more emergency services for acute illnesses. These findings are important for developing interventions that work towards improving the health of LI children.


Assuntos
Pobreza , Qualidade de Vida , Humanos , Singapura , Estudos Transversais , Pré-Escolar , Feminino , Masculino , Criança , Comportamentos Relacionados com a Saúde , Saúde Bucal/estatística & dados numéricos , Lactente , Tempo de Tela , Sono
3.
J Integr Plant Biol ; 2024 Jun 18.
Artigo em Inglês | MEDLINE | ID: mdl-38888227

RESUMO

Anther dehiscence is a crucial event in plant reproduction, tightly regulated and dependent on the lignification of the anther endothecium. In this study, we investigated the rapid lignification process that ensures timely anther dehiscence in Arabidopsis. Our findings reveal that endothecium lignification can be divided into two distinct phases. During Phase I, lignin precursors are synthesized without polymerization, while Phase II involves simultaneous synthesis of lignin precursors and polymerization. The transcription factors MYB26, NST1/2, and ARF17 specifically regulate the pathway responsible for the synthesis and polymerization of lignin monomers in Phase II. MYB26-NST1/2 is the key regulatory pathway responsible for endothecium lignification, while ARF17 facilitates this process by interacting with MYB26. Interestingly, our results demonstrate that the lignification of the endothecium, which occurs within approximately 26 h, is much faster than that of the vascular tissue. These findings provide valuable insights into the regulation mechanism of rapid lignification in the endothecium, which enables timely anther dehiscence and successful pollen release during plant reproduction.

4.
Midwifery ; 135: 104053, 2024 Jun 06.
Artigo em Inglês | MEDLINE | ID: mdl-38861779

RESUMO

BACKGROUND: With increasing paternal involvement in maternal and infant care, expectant fathers, who are often present during the labour process have been seen to use birth plans to express their wishes during childbirth. Despite their involvement, existing literature mainly focuses on maternal outcomes, highlighting the need to explore paternal involvement with birth plans. AIMS: To explore and consolidate the available literature on the involvement of fathers in the birth plan process, their perspectives toward birth plans, and how it has influenced their overall childbirth experience. METHODS: This scoping review was conducted based on Arksey and O'Malley's five-stage framework. Seven databases were searched from 1980 till March 2024: PubMed, Cochrane Library, Embase, Scopus, Web of Science, CINAHL, and Google Scholar. Data were screened, extracted, and cross-checked between two independent reviewers. A thematic analysis was conducted to summarise the data. RESULTS: BASED ON THE FINDINGS FROM THE 33 INCLUDED STUDIES, ONE OVERARCHING THEME WAS IDENTIFIED: : 'Factors promoting and restricting fathers' participation in birth plan'; supported by two main themes 1) Motivations behind paternal engagement in the birth plan process and 2) Roadblocks to paternal involvement in the birth plan. CONCLUSION: The findings of this review provided insights to guide future practice to engage fathers during childbirth by enhancing their involvement in birth plans. The findings on the motivating factors for fathers to be involved in the birth plan process and barriers affecting their participation also provided directions for future research by highlighting the gaps in the current evidence.

5.
Insects ; 15(3)2024 Feb 27.
Artigo em Inglês | MEDLINE | ID: mdl-38535354

RESUMO

The mechanism controlling sex allocation in the pea aphid, Acyrthosiphon pisum (Harris), remains a crucial yet unresolved issue in the field of evolutionary ecology. This study aims to assess the influence of the presence of both self and non-self clones, along with juvenile hormone III (JH III) titer, on the sex allocation of aphid offspring. To this end, red and green clones were utilized as experimental subjects, and the agar method was employed. Initially, three distinct experimental treatments were established using sexuparae, and the daily offspring count and sex allocation in each treatment zone were recorded. Subsequently, an additional experimental condition involving mixed-clone treatments was introduced. This procedure entailed the transfer of a single sexupara and 20 oviparous females from either the red (1G + 20Rov) or green clone (1G + 20Gov) onto a leaf on agar medium. Simultaneously, a control setup with a new sexupara (1G) was established. Three days following sexupara production, a dose of 0, 25, or 50 ng of JH III was applied to the aphids' abdomens. Subsequently, the titers of JH III in the sexuparae across each treatment group were quantified, and the extent of sex allocation was tallied. The findings demonstrated pronounced disparities in sex allocation among the various treatments and, notably, a substantial increase in the total offspring and oviparous number in the mixed-clone treatment group. The effects of mixed-clone treatment on the sex allocation patterns of the sexupara progeny could be determined by the application of exogenous JH III, indicating that JH may mediate the effects of mixed-clone treatment on sex allocation. Consequently, it can be concluded that A. pisum sexuparae possess the capability to modulate their sex allocation in response to the nature of adjacent competitor clones, thereby demonstrating a variety of sex allocation patterns. Throughout this process, JH III plays a pivotal role.

6.
Nat Commun ; 15(1): 1677, 2024 Feb 23.
Artigo em Inglês | MEDLINE | ID: mdl-38395971

RESUMO

Efficient upconversion electroluminescence is highly desirable for a broad range of optoelectronic applications, yet to date, it has been reported only for ensemble systems, while the upconversion electroluminescence efficiency remains very low for single-molecule emitters. Here we report on the observation of anomalously bright single-molecule upconversion electroluminescence, with emission efficiencies improved by more than one order of magnitude over previous studies, and even stronger than normal-bias electroluminescence. Intuitively, the improvement is achieved via engineering the energy-level alignments at the molecule-substrate interface so as to activate an efficient spin-triplet mediated upconversion electroluminescence mechanism that only involves pure carrier injection steps. We further validate the intuitive picture with the construction of delicate electroluminescence diagrams for the excitation of single-molecule electroluminescence, allowing to readily identify the prerequisite conditions for producing efficient upconversion electroluminescence. These findings provide deep insights into the microscopic mechanism of single-molecule upconversion electroluminescence and organic electroluminescence in general.

7.
J Adv Nurs ; 80(3): 1072-1083, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-37706224

RESUMO

BACKGROUND: Online peer support is a useful source of support for parents during the perinatal period, associated with improved psychological outcomes. Past research has found that peer support providers themselves gain from providing peer support as well, making it mutually beneficial. As current maternity care services are insufficient to meet the support needs of parents, the Supportive Parenting App (SPA) intervention was developed to offer them informational, appraisal and emotional support during the perinatal period. It consists of mobile health application-based educational support and online peer support provided by trained peer volunteers, to prevent the development of postnatal depression. OBJECTIVE: To explore the experiences of peer volunteers with providing online peer support to parents during the perinatal period, as well as to identify areas of improvement for the SPA intervention. METHODS: A qualitative descriptive design was adopted. This study took place from October 2020 to August 2021 in two tertiary public healthcare institutions in Singapore. A total of 18 peer volunteers were invited for individual semi-structured interviews. The interviews were audio recorded and transcribed verbatim, and thematic analysis was used to analyse the data. RESULTS: Four themes were emerged as follows: (1) 'Being there': Reminiscing about and healing of own postnatal depression experience; (2) Building rapport with parents; (3) Parents in mind: Mutual sharing of knowledge and how to support new parents better; (4) Ensuring good quality peer support. CONCLUSIONS: The peer volunteers felt that their experience was fulfilling and healing. Frequent contact, sharing of SPA resources and self-disclosure were found to help engage the new parents and build rapport between peer volunteers and parents. Challenges described by the peer volunteers have identified possible areas in which the SPA intervention can be improved. IMPLICATIONS FOR CARE: Communication between peer program facilitators, managers and peer volunteers can be enhanced to ensure that peer volunteers are more sensitive and precise when providing support or information. This can improve rapport building between parents and peer volunteers, which will in turn maximize the benefits that parents can reap through online peer-to-peer support. IMPACT: This study explored the perceptions of peer volunteers who provided online peer support to parents across the perinatal period. Peer volunteers felt that the SPA intervention was meaningful and that providing peer support was a healing experience. They were able to learn about the experiences of other mothers with postpartum depression while sharing their own past experiences. Thus, both parents and peer volunteers can benefit from engaging in online peer support programs. Technology-based interventions like the Supportive Parenting App (SPA) can be a suitable complement to maternity care services by providing parents access to medically accurate information and social support. Additionally, more experienced mothers can engage in fulfilling experiences through volunteering for new mothers who may benefit from informational, appraisal and emotional support. REPORTING METHOD: This study follows the reporting guidelines as stated by the Consolidated criteria for reporting qualitative research (COREQ) checklist. PATIENT OR PUBLIC CONTRIBUTION: Parents and peer volunteers contributed ideas that aided with the design of the mobile app. Many topics added to the educational materials were suggested by these parents as well. WHAT DOES THIS PAPER CONTRIBUTE TO THE WIDER GLOBAL CLINICAL COMMUNITY?: This study showed that sufficient training can be provided to lay peer volunteers to help them support other parents, buffering the pressure exerted on the healthcare industry due to the rising demand for healthcare services. The provision of such support is also beneficial for the peer volunteers themselves, as they find it meaningful and educational. Program developers of parenting and peer volunteering interventions can draw on the findings of this study to improve the effectiveness of these programs.


Assuntos
Depressão Pós-Parto , Serviços de Saúde Materna , Feminino , Humanos , Gravidez , Depressão , Mães/psicologia , Pesquisa Qualitativa , Voluntários
8.
BMC Cancer ; 23(1): 1060, 2023 Nov 03.
Artigo em Inglês | MEDLINE | ID: mdl-37923988

RESUMO

OBJECTIVE: Radiomic and deep learning studies based on magnetic resonance imaging (MRI) of liver tumor are gradually increasing. Manual segmentation of normal hepatic tissue and tumor exhibits limitations. METHODS: 105 patients diagnosed with hepatocellular carcinoma were retrospectively studied between Jan 2015 and Dec 2020. The patients were divided into three sets: training (n = 83), validation (n = 11), and internal testing (n = 11). Additionally, 9 cases were included from the Cancer Imaging Archive as the external test set. Using the arterial phase and T2WI sequences, expert radiologists manually delineated all images. Using deep learning, liver tumors and liver segments were automatically segmented. A preliminary liver segmentation was performed using the UNet + + network, and the segmented liver mask was re-input as the input end into the UNet + + network to segment liver tumors. The false positivity rate was reduced using a threshold value in the liver tumor segmentation. To evaluate the segmentation results, we calculated the Dice similarity coefficient (DSC), average false positivity rate (AFPR), and delineation time. RESULTS: The average DSC of the liver in the validation and internal testing sets was 0.91 and 0.92, respectively. In the validation set, manual and automatic delineation took 182.9 and 2.2 s, respectively. On an average, manual and automatic delineation took 169.8 and 1.7 s, respectively. The average DSC of liver tumors was 0.612 and 0.687 in the validation and internal testing sets, respectively. The average time for manual and automatic delineation and AFPR in the internal testing set were 47.4 s, 2.9 s, and 1.4, respectively, and those in the external test set were 29.5 s, 4.2 s, and 1.6, respectively. CONCLUSION: UNet + + can automatically segment normal hepatic tissue and liver tumors based on MR images. It provides a methodological basis for the automated segmentation of liver tumors, improves the delineation efficiency, and meets the requirement of extraction set analysis of further radiomics and deep learning.


Assuntos
Aprendizado Profundo , Neoplasias Hepáticas , Humanos , Estudos Retrospectivos , Neoplasias Hepáticas/diagnóstico por imagem , Imageamento por Ressonância Magnética , Processamento de Imagem Assistida por Computador
9.
Rev Sci Instrum ; 94(6)2023 Jun 01.
Artigo em Inglês | MEDLINE | ID: mdl-37862523

RESUMO

We report the design and realization of the back focal plane (BFP) imaging for the light emission from a tunnel junction in a low-temperature ultrahigh-vacuum (UHV) scanning tunneling microscope (STM). To achieve the BFP imaging in a UHV environment, a compact "all-in-one" sample holder is designed and fabricated, which allows us to integrate the sample substrate with the photon collection units that include a hemisphere solid immersion lens and an aspherical collecting lens. Such a specially designed holder enables the characterization of light emission both within and beyond the critical angle and also facilitates the optical alignment inside a UHV chamber. To test the performance of the BFP imaging system, we first measure the photoluminescence from dye-doped polystyrene beads on a thin Ag film. A double-ring pattern is observed in the BFP image, arising from two kinds of emission channels: strong surface plasmon coupled emissions around the surface plasmon resonance angle and weak transmitted fluorescence maximized at the critical angle, respectively. Such an observation also helps to determine the emission angle for each image pixel in the BFP image and, more importantly, proves the feasibility of our BFP imaging system. Furthermore, as a proof-of-principle experiment, electrically driven plasmon emissions are used to demonstrate the capability of the constructed BFP imaging system for STM induced electroluminescence measurements. A single-ring pattern is obtained in the BFP image, which reveals the generation and detection of the leakage radiation from the surface plasmon propagating on the Ag surface. Further analyses of the BFP image provide valuable information on the emission angle of the leakage radiation, the orientation of the radiating dipole, and the plasmon wavevector. The UHV-BFP imaging technique demonstrated here opens new routes for future studies on the angular distributed emission and dipole orientation of individual quantum emitters in UHV.

10.
J Phys Condens Matter ; 36(1)2023 Oct 03.
Artigo em Inglês | MEDLINE | ID: mdl-37738991

RESUMO

Spin polarization of two-dimensional electron gas (2DEG) at the interface of EuTiO3/SrTiO3(STO) heterostructures has been theoretical predicted and experimentally observed via x-ray magnetic circular dichroism and polarized x-ray absorption spectroscopy, which, however, is lack of magnetotransport evidence. Here, we report the fabrication of high-quality EuTiO3/STO heterostructures by depositing antiferromagnetic insulating EuTiO3thin films onto STO substrates. Shubnikov-de Haas oscillation, Hall, and magnetoresistance (MR) measurements show that the interface is not only highly conducting, with electron mobility up to5.5×103cm2V-1s-1at 1.8 K, but also shows low-field hysteretic MR effects. MR of ∼9% is observed at 1.8 K and 20 Oe, which is one order of magnitude higher than those observed in other spin-polarized 2DEG oxide systems. Moreover, the heterostructures show ferromagnetic hysteresis loops. These results demonstrate that the high-mobility 2DEG is spin polarized, whose origin is attributed to the interfacial Ti3+-3dstates due to oxygen deficiency and the exchange interactions between interfacial Eu spins and itinerant Ti-3delectrons.

11.
Worldviews Evid Based Nurs ; 20(5): 451-464, 2023 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-37559467

RESUMO

BACKGROUND: Extensive literature has shown the effectiveness of cognitive behavioral therapy in treating perinatal depression, but little is known about the effectiveness of its technology-based version. AIM: The aim of this review was to examine the effectiveness of technology-based cognitive behavioral therapy in reducing depressive and anxiety symptoms in women suffering from or at risk of experiencing perinatal depression. METHODS: Six electronic databases were searched until February 2023 for articles published in English. Random-effect meta-analyses were conducted. Heterogeneity was assessed using the I2 statistics and Cochran's Q chi-squared test. Sensitivity analyses and subgroup analyses were also performed, and quality appraisals at the study and outcome levels were conducted. RESULTS: A total of 16 randomized controlled trials were included in the review. Results from meta-analyses suggest that technology-based cognitive behavioral therapy has a medium effect in reducing perinatal depressive symptoms and a small effect in reducing perinatal anxiety symptoms. Overall, women suffering from or at risk of perinatal depression may benefit from technology-based cognitive behavioral therapy. LINKING EVIDENCE TO ACTION: Future interventions can be improved by addressing both perinatal depression and anxiety, paying more attention to antenatal women to prevent postnatal mental health issues, and using self-guided mobile applications for accessibility.


Assuntos
Terapia Cognitivo-Comportamental , Depressão , Feminino , Humanos , Gravidez , Depressão/terapia , Depressão/diagnóstico , Terapia Cognitivo-Comportamental/métodos , Transtornos de Ansiedade , Ansiedade/terapia , Ansiedade/diagnóstico , Tecnologia
12.
J Tradit Chin Med ; 43(4): 667-675, 2023 08.
Artigo em Inglês | MEDLINE | ID: mdl-37454251

RESUMO

OBJECTIVE: To investigate the therapeutic action and mechanism of the Qizhi Jiangtang capsule (, QZJT) on diabetic kidney disease (DKD) treatment. METHODS: This experiment used db/db mice and podocytes (MPC5) to develop DKD model. Evaluation of the effect of the QZJT on db/db mice by testing urine and blood biochemical parameters (24-h urinary albumin, serum creatinine, blood urine nitrogen), pathological kidney injury, and podocyte integrity. Moreover, autophagosomes in podocytes of DKD mice and cultured podocytes were detected using electron microscopy. Additionally, Western blotting was applied to detect the expression of podocyte marker protein (podocin), autophagy-associated proteins, and phosphatidylinositol 3-kinase/protein kinase B/mammalian target of rapamycin (PI3K/AKT/mTOR) signaling pathway changes and . RESULTS: QZJT significantly reduced urine protein, blood nitrogen urea, and serum creatinine and showed histological restoration of renal tissues. QZJT also significantly improved the down-regulation of podocin and foot fusion and effacement in db/db mice. QZJT increased autophagic vesicles in mice and cultured podocytes. QZJT also upregulated microtubule-associated protein 1 light chain 3-II (LC3-II) / (LC3-I) and Beclin-1 and downregulated phosphorylated-PI3K (p-PI3K), p-AKT, and p-mTOR in db/db mice and MPC5 cells. However, autophagy inhibitor 3-methyladenine partially alleviated the above effects in MPC5 cells. CONCLUSIONS: These results showed that the QZJT can enhance podocyte autophagy and ameliorate podocyte injury in DKD by inhibiting the PI3K/AKT/mTOR signaling pathway.


Assuntos
Diabetes Mellitus , Nefropatias Diabéticas , Podócitos , Camundongos , Animais , Proteínas Proto-Oncogênicas c-akt/genética , Proteínas Proto-Oncogênicas c-akt/metabolismo , Nefropatias Diabéticas/tratamento farmacológico , Nefropatias Diabéticas/genética , Nefropatias Diabéticas/metabolismo , Fosfatidilinositol 3-Quinase/metabolismo , Fosfatidilinositol 3-Quinases/genética , Fosfatidilinositol 3-Quinases/metabolismo , Creatinina/metabolismo , Serina-Treonina Quinases TOR/genética , Serina-Treonina Quinases TOR/metabolismo , Autofagia , Mamíferos/metabolismo , Diabetes Mellitus/metabolismo
13.
Front Neurol ; 14: 1164605, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37273698

RESUMO

A case of neurosyphilis with a positive anti-N-methyl-D-aspartate receptor (NMDAR) antibody was reported. A 54-year-old man who presented with acute memory deficits was admitted to our hospital. Acute ischemic stroke (AIS) was initially considered, and he was prescribed intravenous thrombolysis with recombinant tissue-type plasminogen activator (rt-PA). However, the intermittent onset of episodic memory and orientation disorder still occurred. No diffusion restriction was indicated by magnetic resonance imaging (MRI), and subclinical seizures were frequently found by electroencephalogram (EEG). Rapid plasma reagin (RPR) test of serum showed positive results for syphilis. Analysis of cerebrospinal fluid (CSF) revealed elevated leukocyte count and protein level. RPR test, Treponema pallidum particle agglutination (TPPA) assay, and Treponema pallidum antibody (TP-Ab) in CSF showed positive results, and the anti-NMDAR antibodies were positive in CSF and serum. Finally, the patient was diagnosed with neurosyphilis with a positive anti-NMDAR antibody. The clinical symptoms were improved, and the leukocyte count in CSF was reduced after treatment with intravenous penicillin G and levetiracetam. This case suggests that in cases with positive results for neurosyphilis and NMDAR antibodies, the proper treatment has to be decided based on all of the available clinical and diagnostic testing data.

14.
Plant Physiol ; 193(1): 627-642, 2023 08 31.
Artigo em Inglês | MEDLINE | ID: mdl-37233029

RESUMO

Protecting haploid pollen and spores against UV-B light and high temperature, 2 major stresses inherent to the terrestrial environment, is critical for plant reproduction and dispersal. Here, we show flavonoids play an indispensable role in this process. First, we identified the flavanone naringenin, which serves to defend against UV-B damage, in the sporopollenin wall of all vascular plants tested. Second, we found that flavonols are present in the spore/pollen protoplasm of all euphyllophyte plants tested and that these flavonols scavenge reactive oxygen species to protect against environmental stresses, particularly heat. Genetic and biochemical analyses showed that these flavonoids are sequentially synthesized in both the tapetum and microspores during pollen ontogeny in Arabidopsis (Arabidopsis thaliana). We show that stepwise increases in the complexity of flavonoids in spores/pollen during plant evolution mirror their progressive adaptation to terrestrial environments. The close relationship between flavonoid complexity and phylogeny and its strong association with pollen survival phenotypes suggest that flavonoids played a central role in the progression of plants from aquatic environments into progressively dry land habitats.


Assuntos
Arabidopsis , Flavonoides , Plantas , Pólen/genética , Arabidopsis/genética , Flavonóis , Esporos
15.
Phys Chem Chem Phys ; 25(10): 7550, 2023 Mar 08.
Artigo em Inglês | MEDLINE | ID: mdl-36848140

RESUMO

Correction for 'Magnetotransport and magnetic properties of Cr-modified Mn2Sb epitaxial thin films' by Ting-Wei Chen et al., Phys. Chem. Chem. Phys., 2023, 25, 5785-5794, https://doi.org/10.1039/D2CP05442F.

16.
Phys Chem Chem Phys ; 25(7): 5785-5794, 2023 Feb 15.
Artigo em Inglês | MEDLINE | ID: mdl-36744652

RESUMO

High-quality Mn2-xCrxSb (x = 0.01, 0.04, and 0.1) epitaxial thin films were grown on SrTiO3 (STO) (001) single-crystal substrates using molecular beam epitaxy. Magnetotransport and magnetic measurements reveal that the x = 0.01 sample undergoes a quasi-ferrimagnetic (I) [Q-FIM(I)]-to-ferrimagnetic (II) [FIM(II)] spin reorientation (SR) transition and a giant magnetoresistance (MR) associated first-order ferrimagnetic(II)-to-antiferromagnetic (AFM) phase transition upon cooling, resulting in the AFM ground state with a weak in-plane net moment. Upon increasing the doping level from x = 0.01 to 0.1, both the SR transition and the first-order magnetic transition are suppressed. For x = 0.1, the former transition is suppressed, leaving only the Q-FIM(I)-to-AFM transition within the whole temperature region. TAFM-FIM shows almost similar changes upon the application of either in-plane or out-of-plane magnetic fields. TAFM-FIM values of the x = 0.01 and 0.04 samples are much higher than those of the Mn2-xCrxSb bulk with similar doping levels, which can be understood by the clamping effect from STO substrates. For each thin-film sample, the MR effect is observed near TAFM-FIM and disappears in the high temperature Q-FIM(I) phase and low temperature AFM phase, indicating that MR is related to the spin-dependent electron scattering during the first-order magnetic phase transition. Based on the magnetotransport and magnetic data, a magnetic phase diagram is established for the Mn2-xCrxSb films in the low doping level region.

17.
Dev Psychobiol ; 65(2): e22359, 2023 03.
Artigo em Inglês | MEDLINE | ID: mdl-36811366

RESUMO

Oxytocin (OT) plays a pivotal role in early parent-child relationship formation and bonding that is critical for the social, cognitive, and emotional development of the child. Therefore, this systematic review aims to consolidate all available evidence regarding the associations of parental OT concentration levels with parenting behavior and bonding within the past 20 years. A systematic search was conducted in five databases from 2002 to May 2022, and 33 studies were finalized and included. Due to the heterogeneity of the data, findings were presented narratively based on the type of OT and parenting outcomes. Current evidence strongly suggests that parental OT levels are positively related to parental touch and parental gaze and affect synchrony and observer-coded parent-infant bonding. No gender difference in OT levels was observed between fathers and mothers, but OT strengthens affectionate parenting in mothers and stimulatory parenting in fathers. Child OT levels were also positively associated with parental OT levels. Family and healthcare providers could encourage more positive touch and interactive play between parent and child to strengthen parent-child relationships.


Assuntos
Ocitocina , Poder Familiar , Lactente , Feminino , Humanos , Poder Familiar/psicologia , Relações Pais-Filho , Pais , Mães/psicologia
18.
JMIR Mhealth Uhealth ; 11: e43885, 2023 02 22.
Artigo em Inglês | MEDLINE | ID: mdl-36811952

RESUMO

BACKGROUND: Previous studies have investigated the various effects of parenting on infant developmental outcomes. In particular, parental stress and social support have been found to significantly affect the growth of the newborn. Although many parents today use mobile apps to obtain more support in parenting and perinatal care, few studies have examined how these apps could affect infant development. OBJECTIVE: This study aimed to examine the effectiveness of the Supportive Parenting App (SPA) in improving infant developmental outcomes during the perinatal period. METHODS: This study adopted a 2-group parallel prospective longitudinal design and recruited 200 infants and their parents (N=400 mothers and fathers). The parents were recruited at 24 weeks of gestation for a randomized controlled trial conducted from February 2020 to July 2022. They were randomly allocated to either the intervention or control group. The infant outcome measures included cognition, language, motor skills, and social-emotional development. Data were collected from the infants when they were aged 2, 4, 6, 9, and 12 months. Linear and modified Poisson regressions were used to analyze the data to examine between- and within-group changes. RESULTS: At 9 and 12 months post partum, the infants in the intervention group were found to have better communication and language skills than those in the control group. An analysis of motor development revealed that a larger proportion of the infants in the control group fell under the at-risk category, where they scored approximately 2 SDs below the normative scores. The control group infants scored higher on the problem solving domain at 6 months post partum. However, at 12 months postpartum, the infants in the intervention group performed better on cognitive tasks than those in the control group. Despite not being statistically significant, the intervention group infants were found to have consistently scored better on the social components of the questionnaires than the control group infants. CONCLUSIONS: Overall, the infants whose parents had received the SPA intervention tended to fare better in most developmental outcome measures than those whose parents had received standard care only. The findings of this study suggest that the SPA intervention exerted positive effects on the communication, cognition, motor, and socioemotional development of the infants. Further research is needed to improve the content and support provided by the intervention to maximize the benefits gained by infants and their parents. TRIAL REGISTRATION: ClinicalTrials.gov NCT04706442; https://clinicaltrials.gov/ct2/show/NCT04706442.


Assuntos
Aplicativos Móveis , Poder Familiar , Recém-Nascido , Feminino , Criança , Gravidez , Humanos , Lactente , Poder Familiar/psicologia , Desenvolvimento Infantil , Estudos Longitudinais , Estudos Prospectivos
19.
J Med Internet Res ; 25: e41859, 2023 01 16.
Artigo em Inglês | MEDLINE | ID: mdl-36645699

RESUMO

BACKGROUND: Adjusting to new or additional parenting responsibilities increases stress and affects parental well-being. Existing research has highlighted both parents' desire to receive more support. It has also been found that receiving sufficient social support enhances parenting outcomes. With the increasing popularity of mobile health apps, a Supportive Parenting App (SPA) intervention was developed to fulfill the support needs of parents during the perinatal period. OBJECTIVE: This study aimed to examine the effectiveness of the SPA on parental outcomes during the perinatal period. METHODS: A 2-group pretest and repeated posttest randomized controlled trial was conducted wherein 200 couples (N=400 mothers and fathers) were recruited from 2 public health care institutions in Singapore. Parents were randomly assigned to intervention (100/200, 50%) or control (100/200, 50%) groups. The SPA intervention consisted of a mobile app-based psychoeducation and peer support program to support parents from pregnancy to 6 months post partum. The outcome measures included postnatal depression, anxiety, parental bonding, parental self-efficacy, perceived social support, and parenting satisfaction. Data were collected at baseline (at >24 weeks of gestation-age of viability in Singapore) and at the first, second, fourth, sixth, ninth, and 12th month post partum. Linear mixed models were used to compare parental outcomes between the groups, and a linear mixed model for repeated measures was used to examine within-group changes. RESULTS: Parents in the intervention group mostly showed better outcomes compared with those in the control group. Parents in the intervention group had higher perceived social support than those in the control group at the first (effect size=1.59, 95% CI 0.38-2.80; Cohen standardized effect size=1.31; P=.01), second (effect size=1.98, 95% CI 1.09-2.88; Cohen standardized effect size=2.21; P=.003), and fourth (effect size=2.57, 95% CI 1.62-3.51; Cohen standardized effect size=2.72; P=.048) months post partum. However, parents in the intervention group showed significantly poorer parental bonding (effect size=1.67, 95% CI 0.24-3.11; Cohen standardized effect size=1.16; P=.02). The other parental outcomes did not differ significantly between groups. The scores of mothers and fathers also differed significantly for all outcomes except parental self-efficacy. CONCLUSIONS: Parents in the intervention group generally fared better, especially regarding perceived social support. However, the lack of statistical significance in most outcomes showed the limited effectiveness of the SPA intervention, which may be because of the COVID-19 pandemic. Parental differences in outcome scores suggest that mothers and fathers have different support needs; therefore, interventions should be tailored accordingly. Further improvements and evaluations are needed to examine the effectiveness of the SPA intervention in enhancing parental outcomes. Despite statistically insignificant results, limitations should be considered to further improve mobile health app-based interventions such as SPA, as they could serve as reliable and convenient sources of support for parents. TRIAL REGISTRATION: Clinicaltrails.gov NCT4706442; https://clinicaltrials.gov/ct2/show/NCT04706442.


Assuntos
COVID-19 , Aplicativos Móveis , Feminino , Gravidez , Humanos , Poder Familiar , Pandemias , Pais
20.
Birth ; 50(1): 16-31, 2023 03.
Artigo em Inglês | MEDLINE | ID: mdl-36598288

RESUMO

BACKGROUND: Even when maternity care facilities are available, some women will choose to give birth unassisted by a professional (freebirth). This became more apparent during the pandemic of coronavirus disease 2019 (COVID-19), as women were increasingly concerned they would contract the virus in health care facilities. Several studies have identified the factors that influence women to seek alternative places of birth to hospitals, but research focusing specifically on freebirth is limited. METHODS: Eight databases were searched from their respective inception dates to April 2022 for studies related to freebirth. Data from the studies were charted and a thematic analysis was subsequently conducted. RESULTS: Four themes were identified based on findings from the 25 included studies: (1) Geographical and socio-demographic determinants influencing freebirth, (2) Reasons for choosing freebirth, (3) Factors hindering freebirth, and (4) Preparation for and varied experiences of freebirth. DISCUSSION: More women chose to give birth unassisted in low- and middle-income countries (LMICs) compared with high-income countries (HICs). Overall, motivation for freebirth included previous negative birth experiences with health care professionals, a desire to adhere to their birth-related beliefs, and fear of contracting the COVID-19 virus. Included studies reported that study participants were often met with negative responses when they revealed that they were planning to freebirth. Most women in the included studies had positive freebirth experiences. Future research should explore the different motivators of freebirth present in LMICs or HICs to help inform effective policies that may improve birth experiences while maintaining safety.


Assuntos
COVID-19 , Serviços de Saúde Materna , Obstetrícia , Gravidez , Feminino , Humanos , Motivação , Parto
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