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1.
Artigo em Inglês | MEDLINE | ID: mdl-38630403

RESUMO

Numerous technological advancements have been developed to tackle the issue of wastewater remediation effectively. However, the practical application of these technologies on a large scale has faced several challenges that have hindered their progress. These challenges include low selectivity, high energy requirements, and significant expenses. Nanoscale materials have demonstrated remarkable effectiveness in removing a wide range of contaminants. Nanoscale zero-valent iron (NZVI) exhibits a range of distinctive physical and chemical properties that have proven to be highly effective in various environmental remediation applications. These include its impressive surface area, remarkable reactivity, and its capacity to create stable colloidal suspensions. The paper explores the synthetic techniques for NZVI with special emphasis on green synthesis and the use of capping or support agents for maintaining stability and enhancing the reactivity of NZVI. The various structural and reactivity aspects of NZVI have been highlighted for its potential application in wastewater treatment sequestrating various categories of inorganic and organic contaminants. The discussion also delves into the limitations of NZVI, highlighting its dependence on water as a medium for contact reaction or electron transfer through the action mechanism of NZVI in adsorptive and photocatalytic sequestration of contaminants. The beneficial potential of NZVI-based composite systems in the field of environmental remediation has also been included which aids in the application of NZVI in environmental remediation.

2.
J Womens Health (Larchmt) ; 33(6): 816-826, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38501235

RESUMO

Background: Syndemic models have been used in previous studies exploring HIV-related outcomes; however, these models do not fully consider intersecting psychosocial (e.g., substance use, depressive symptoms) and structural factors (unstable housing, concentrated housing vacancy) that influence the lived experiences of women. Therefore, there is a need to explore the syndemic effects of psychosocial and structural factors on HIV risk behaviors to better explain the multilevel factors shaping HIV disparities among black women. Methods: This analysis uses baseline data (May 2009-August 2010) from non-Hispanic black women enrolled in the HIV Prevention Trials Network 064 Women's Seroincidence Study (HPTN 064) and the American Community Survey 5-year estimates from 2007 to 2011. Three parameterizations of syndemic factors were applied in this analysis a cumulative syndemic index, three syndemic groups reflecting the level of influence (psychosocial syndemic group, participant-level structural syndemic group, and a neighborhood-level structural syndemic group), and syndemic factor groups. Clustered mixed effects log-binomial analyses measured the relationship of each syndemic parameterization on HIV risk behaviors in 1,347 black women enrolled in HPTN 064. Results: A higher syndemic score was significantly associated with increased prevalence of unknown HIV status of the last male sex partner (adjusted prevalence ratio (aPR) = 1.07, 95% confidence interval or CI 1.04-1.10), involvement in exchange sex (aPR = 1.17, 95% CI: 1.14-1.20), and multiple sex partners (aPR = 1.07, 95% CI: 1.06-1.09) in the last 6 months. A dose-response relationship was observed between the number of syndemic groups and HIV risk behaviors, therefore, being in multiple syndemic groups was significantly associated with increased prevalence of reporting HIV risk behaviors compared with being in one syndemic group. In addition, being in all three syndemic groups was associated with increased prevalence of unknown HIV status of the last male sex partner (aPR = 1.67, 95% CI: 1.43-1.95) and multiple sex partners (aPR = 1.53, 95% CI: 1.36-1.72). Conclusions: Findings highlight syndemic factors influence the lived experiences of black women.


Assuntos
Negro ou Afro-Americano , Infecções por HIV , Assunção de Riscos , Comportamento Sexual , Transtornos Relacionados ao Uso de Substâncias , Sindemia , Humanos , Feminino , Infecções por HIV/etnologia , Infecções por HIV/epidemiologia , Infecções por HIV/psicologia , Negro ou Afro-Americano/estatística & dados numéricos , Negro ou Afro-Americano/psicologia , Adulto , Transtornos Relacionados ao Uso de Substâncias/epidemiologia , Transtornos Relacionados ao Uso de Substâncias/etnologia , Comportamento Sexual/etnologia , Comportamento Sexual/psicologia , Depressão/epidemiologia , Depressão/etnologia , Pessoa de Meia-Idade , Fatores Socioeconômicos , Fatores de Risco , Estados Unidos/epidemiologia , Habitação , Características de Residência , Adulto Jovem
3.
Polymers (Basel) ; 16(2)2024 Jan 21.
Artigo em Inglês | MEDLINE | ID: mdl-38276702

RESUMO

Essential for human development, water is increasingly polluted by diverse anthropogenic activities, containing contaminants like organic dyes, acids, antibiotics, inorganic salts, and heavy metals. Conventional methods fall short, prompting the exploration of advanced, cost-effective remediation. Recent research focuses on sustainable adsorption, with nano-modifications enhancing adsorbent efficacy against persistent waterborne pollutants. This review delves into recent advancements (2020-2023) in sustainable biopolymeric nanocomposites, spotlighting the applications of biopolymers like chitosan in wastewater remediation, particularly as adsorbents and filtration membranes along with their mechanism. The advantages and drawbacks of various biopolymers have also been discussed along with their modification in synthesizing biopolymeric nanocomposites by combining the benefits of biodegradable polymers and nanomaterials for enhanced physiochemical and mechanical properties for their application in wastewater treatment. The important functions of biopolymeric nanocomposites by adsorbing, removing, and selectively targeting contaminants, contributing to the purification and sustainable management of water resources, have also been elaborated on. Furthermore, it outlines the reusability and current challenges for the further exploration of biopolymers in this burgeoning field for environmental applications.

4.
Dalton Trans ; 52(34): 11750-11767, 2023 Aug 29.
Artigo em Inglês | MEDLINE | ID: mdl-37605883

RESUMO

All-inorganic and organic-inorganic hybrid perovskite solar cells (PSCs) have taken a quantum leap owing to their high performance and low-cost solution processability. Their efficiency has been dramatically increased up to ∼26%, matching the conventional inorganic photovoltaics like monocrystalline Si (26.1%), polycrystalline Si (21.6%), CdTe (22.1%), and CIGS (22.3%). Such outstanding performance has been achieved due to their excellent optoelectronic properties, such as a direct bandgap in the visible region, a very high absorption coefficient, a long charge-carrier diffusion length, and ambipolar carrier transport characteristics. FAPbI3 (FA = formamidinium) and CsPbI3 perovskites among the pool of perovskites are recommended for solar cell applications because they meet all the requirements for photovoltaic applications. However, the fundamental problem of these perovskites is that their photoactive black phase is highly unstable under ambient conditions due to small and large sizes of Cs+ and FA+ ions, respectively. The instability of the black phase of these perovskites hinders their applications in photovoltaic devices as a high-quality light absorber layer. Several approaches have been employed to prevent the formation of the photo-inactive yellow phase or to enhance the stability of the black phase of perovskites, such as dimensional and compositional engineering, the addition of external additives, and dimensional engineering. This perspective summarizes the various methods for stabilizing the black phase of CsPbI3 and FAPbI3 perovskites at room temperature as well as their application in photovoltaic devices.

5.
Prof Psychol Res Pr ; 54(1): 103-113, 2023 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-37261211

RESUMO

The SARS-CoV-2 (COVID-19) pandemic has placed a tremendous strain on healthcare providers. Although there is a burgeoning body of literature on how COVID-19 has impacted frontline healthcare workers (i.e., providers treating COVID-19 patients), little attention has been dedicated to second-line workers (i.e., providers treating the mental health of people impacted by COVID-19). In this paper, we present findings from a thematic analysis of open text responses (n = 136) examining how COVID-19 shaped both the wellbeing of second-line workers, specifically mental health providers, as well as their clinical work in the early months of the COVID-19 pandemic in the United States. Results indicated that mental health providers were experiencing significant COVID-19-related burnout and poor physical and mental health outcomes. Participants described diminished negative effects on the quality of their clinical care from the burnout and trauma associated with COVID-19. Many also demonstrated resilience, identifying the duality of both negative (e.g., exhaustion) and positive (e.g., pride in helping others) meaning derived from their second-line work experiences. We conclude with recommendations for preventing and addressing burnout among mental health professionals in the era of COVID-19 and subsequent health emergencies.

6.
Artigo em Inglês | MEDLINE | ID: mdl-37047893

RESUMO

Intimate partner violence (IPV) in India remains an entrenched and prevalent public health issue. Despite ample evidence of the widespread problem of IPV in India and associated mental and physical morbidities, far less is known about intervention models to reduce IPV in India. The aims of this meta-analysis and systematic review are to assess the effectiveness of community-based interventions to reduce IPV in India and to provide a narrative synthesis of these intervention approaches. A total of 9 databases were searched to identify peer-reviewed, English-language articles published between January 2000 and September 2022. The search identified 10 studies that met study inclusion criteria, including 3 randomized control trials, 4 quasi-experimental, 2 pre/post, and 1 time-series evaluation. Eight studies were included in the meta-analysis. There was notable variation in the interventions and approaches employed to reduce IPV and varying measurement of IPV outcomes. The results of the meta-analysis show that participating in community-based IPV interventions produced a significant reduction in IPV among women. When considering different types of IPV, study participants were less likely to report physical and psychological IPV victimization. In addition, participants were also less likely to report approving of IPV after participating in community-based IPV interventions. Community-based interventions and research addressing IPV are still evolving in India. Missing descriptions of theoretical frameworks, sampling, intervention design, and inadequately reported effectiveness of intervention (both quantitative and qualitative reporting) need to be addressed. Moreover, long-term evaluations of the pilot interventions are needed to provide a clear picture of the long-term effectiveness, sustainability, and replicability of the community-based IPV interventions. The findings have implications for researchers, practitioners (community health workers, clinicians, and social workers), and policymakers keen on IPV reduction in India and globally.


Assuntos
Vítimas de Crime , Violência por Parceiro Íntimo , Humanos , Feminino , Violência por Parceiro Íntimo/prevenção & controle , Violência por Parceiro Íntimo/psicologia , Índia , Projetos de Pesquisa
7.
Langmuir ; 39(17): 6231-6239, 2023 May 02.
Artigo em Inglês | MEDLINE | ID: mdl-37074843

RESUMO

In the present work, we report the fabrication and characterization of well-defined core-satellite nanostructures. These nanostructures comprise block copolymer (BCP) micelles, containing a single gold nanoparticle (AuNP) in the core and multiple photoluminescent cadmium selenide (CdSe) quantum dots (QDs) attached to the micelle's coronal chains. The asymmetric polystyrene-block-poly(4-vinylpyridine) (PS-b-P4VP) BCP was employed to develop these core-satellite nanostructures in a series of P4VP-selective alcoholic solvents. The BCP micelles were first prepared in 1-propanol and subsequently mixed with AuNPs, followed by gradual addition of CdSe QDs. This method resulted in the development of spherical micelles that contained a PS/Au core and a P4VP/CdSe shell. These core-satellite nanostructures, developed in different alcoholic solvents, were further employed for the time-resolved photoluminescence analysis. It was found that solvent-selective swelling of the core-satellite nanostructures tunes the distance between the QDs and AuNPs and modulates their Förster resonance energy transfer (FRET) behavior. The average lifetime of the donor emission varied from 12.3 to 10.3 nanoseconds (ns) with the change in the P4VP-selective solvent within the core-satellite nanostructures. Furthermore, the distances between the donor and acceptor were also calculated using efficiency measurements and corresponding Förster distances. The resulting core-satellite nanostructures hold promising potential in various fields, such as photonics, optoelectronics, and sensors that utilize the FRET process.

8.
AIDS Behav ; 27(3): 796-805, 2023 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-36097086

RESUMO

Pre-Exposure Prophylaxis (PrEP) is a priority method for preventing HIV infection. This study's aims were threefold: (1) identify characteristics of members of a large health maintenance organization, Kaiser Permanente Georgia (KPGA), associated with HIV infection, (2) identify which member characteristics associated with HIV were also associated with PrEP prescription, and (3) identify which HIV-associated characteristics were associated with under- or over-prescribing of PrEP. Analysis of variables from the electronic medical record revealed that age, race, gender, mental health diagnosis, STI diagnosis, and sexual orientation were independently associated with HIV diagnosis. The same characteristics were independently associated with PrEP prescription except for race. Persons identifying as Black or unknown race, women, and/or heterosexual; and who had an STI diagnosis and/or illicit drug use had lower odds of being prescribed PrEP than of having an HIV diagnosis. The implications of these findings for improving physician identification of candidates for PrEP prescription are discussed.


Assuntos
Fármacos Anti-HIV , Prestação Integrada de Cuidados de Saúde , Infecções por HIV , Profilaxia Pré-Exposição , Humanos , Masculino , Feminino , Fármacos Anti-HIV/uso terapêutico , Infecções por HIV/prevenção & controle , Georgia , Prescrições , Profilaxia Pré-Exposição/métodos
9.
Artigo em Inglês | MEDLINE | ID: mdl-35410050

RESUMO

Despite the success of HIV prevention drugs such as PrEP, HIV incident transmission rates remain a significant problem in the United States. A life-course perspective, including experiences of childhood adversity, may be useful in addressing the HIV epidemic. This paper used 2019 BRFSS data to elucidate the role that childhood adversity plays in the relationship between HIV risk and HIV testing. Participants (n = 58,258) completed self-report measures of HIV risk behaviors, HIV testing, and adverse childhood experiences (ACEs). The median number ACEs in the sample was 1, with verbal abuse (33.9%), and parental separation (31.3%) being the most common ACEs reported. Bivariate findings showed that all ACEs were associated with increased HIV risk and testing. However, increased risk was not correlated with increased HIV testing, with the highest incongruence related to mental health problems of household member (53.48%). While both self-reported HIV risk and ACEs were positively associated with HIV testing, their interaction had a negative association with testing (aPR = 0.51, 95%CI 0.42, 0.62). The results highlight the need for targeted HIV prevention strategies for at-risk individuals with a history of childhood adversity.


Assuntos
Experiências Adversas da Infância , Sistema de Vigilância de Fator de Risco Comportamental , Divórcio , Humanos , Assunção de Riscos , Comportamento Sexual , Estados Unidos/epidemiologia
10.
Phys Chem Chem Phys ; 24(14): 8519-8528, 2022 Apr 06.
Artigo em Inglês | MEDLINE | ID: mdl-35348140

RESUMO

Semiconductor nanoheterostructures (NHSs) are being increasingly used for the photocatalytic conversion of solar energy in which photo-induced charge separation is an essential step and hence it is necessary to understand the effect of various factors such as size, shape, and composition on the charge transfer dynamics. Ultrafast transient absorption spectroscopy is used to investigate the nature and dynamics of photo-induced charge transfer processes in ZnSe-CdS NHSs of different morphologies such as nanospheres (NSs), nanorods (NRs), and nanoplates (NPs). It demonstrates the fast separation of charge carriers and localization of both charges in adjacent semiconductors, resulting in the formation of a charge-separated (CS) state. The lifetime of the charge-separated state follows the order of NSs < NPs < NRs, emphasizing the effect of morphology on the enhancement of photo-induced charge separation and suppression of backward recombination. The separated charge carriers have been utilized in visible light driven hydrogen production and the hydrogen generation activity follows the same order as that for the lifetime of the CS state, underlining the role of charge separation efficiency. Therefore, the variation of the morphology of NHSs plays a significant role in their charge carrier dynamics and hence the photocatalytic hydrogen production activity.

11.
J Interpers Violence ; 37(3-4): NP1253-NP1274, 2022 02.
Artigo em Inglês | MEDLINE | ID: mdl-32517563

RESUMO

Women who have experienced intimate partner violence (IPV) are more likely to engage in risky sexual behaviors that increase the likelihood of adverse sexual health outcomes, including HIV acquisition. This study explored key predictors of safer sex self-efficacy in a sample of racially/ethnically diverse abused women. A total of 173 women were recruited from domestic violence agencies and completed a battery of measures that assessed risk factors associated with HIV risk. Both individual- and relationship-level predictors of safer sex self-efficacy were examined, including IPV, partner dependence, HIV knowledge, condom attitudes, self-esteem, and alcohol use. Hierarchical linear regression analysis results indicated several key predictors for safer sex self-efficacy, including IPV (B = -0.01, p < .05), partner dependence (B = -0.45, p < .001), condom attitudes (B = 0.63, p < .001), and alcohol use (B = - 0.24, p < .05). It is evident that a number of individual- and relationship-level factors affect the degree of safer sex self-efficacy among abused women. In work with this population, researchers and clinicians should intentionally attend to the identified predictors to most effectively address the needs of these women.


Assuntos
Infecções por HIV , Violência por Parceiro Íntimo , Feminino , Infecções por HIV/epidemiologia , Humanos , Fatores de Risco , Sexo Seguro , Autoeficácia , Parceiros Sexuais
12.
J Mol Liq ; 368(A)2022 Dec 15.
Artigo em Inglês | MEDLINE | ID: mdl-38130892

RESUMO

Nanomaterials by virtue of their small size and enhanced surface area, present unique physicochemical properties that enjoy widespread applications in bioengineering, biomedicine, biotechnology, disease diagnosis, and therapy. In recent years, graphene and its derivatives have attracted a great deal of attention in various applications, including photovoltaics, electronics, energy storage, catalysis, sensing, and biotechnology owing to their exceptional structural, optical, thermal, mechanical, and electrical. Graphene is a two-dimensional sheet of sp2 hybridized carbon atoms of atomic thickness, which are arranged in a honeycomb crystal lattice structure. Graphene derivatives are graphene oxide (GO) and reduced graphene oxide (rGO), which are highly oxidized and less oxidized forms of graphene, respectively. Another form of graphene is graphene quantum dots (GQDs), having a size of less than 20 nm. Contemporary graphene research focuses on using graphene nanomaterials for biomedical purposes as they have a large surface area for loading biomolecules and medicine and offer the potential for the conjugation of fluorescent dyes or quantum dots for bioimaging. The present review begins with the synthesis, purification, structure, and properties of graphene nanomaterials. Then, we focussed on the biomedical application of graphene nanomaterials with special emphasis on drug delivery, bioimaging, biosensing, tissue engineering, gene delivery, and chemotherapy. The implications of graphene nanomaterials on human health and the environment have also been summarized due to their exposure to their biomedical applications. This review is anticipated to offer useful existing understanding and inspire new concepts to advance secure and effective graphene nanomaterials-based biomedical devices.

13.
Cureus ; 13(3): e14116, 2021 Mar 25.
Artigo em Inglês | MEDLINE | ID: mdl-33907649

RESUMO

Introduction Disease management programs (DMPs) provide education, self-management skills, care coordination, and frequent clinical assessment and medication adjustment. Our health system's diabetes mellitus (DM) DMP recruited patients from an emergency department (ED) and outpatient settings (primary care physicians' [PCP] and endocrinologists' offices; cold calling patients with poorly-controlled diabetes). We investigated whether recruitment to a DMP from an ED is feasible and effective, hypothesizing such patients would have better enrollment rates, future A1c control, and ED utilization because their receptiveness to change was "framed" by their ED visit. "Framing" is the notion that the same problem presented using a different context impacts response to the information. Being told in an acute-care ED setting one has newly-diagnosed or poorly-controlled DM, or DM-related complications may influence desire/commitment to enroll in the DMP and make lifestyle/medication changes. That is, acute illness or acute setting may influence/"frame" willingness to enroll and improve glycemic control.  Methods We captured all DMP recruitees' demographic, medical, insurance, A1c, and recruitment venue characteristics and evaluated future enrollment rates, A1c, and ED utilization from any ED in our health system. We analyzed pre- vs. post-recruitment changes in A1c and ED visit rates, comparing patients recruited from the ED who enrolled, patients recruited from the ED who did not enroll, patients recruited from outpatient settings who enrolled, and patients recruited from outpatient settings who did not enroll. Continuous enrollment predictor and outcome variables were compared using the Mann-Whitney test; categorical outcome variables were compared using Fisher's exact test. Results There were no statistically significant differences in characteristics (including mean baseline A1c [~11.4%]) among patients recruited from the ED, clinics, or cold calling. Twenty-five percent of all ED-recruited patients enrolled vs. 35% from outpatient settings. When a recruiter familiar with the DMP was in the ED, 41% of ED patients enrolled vs. 12% at other times (p=0.0001). Nearly 84% of ED visits were for direct DM-related causes (eg, diabetic ketoacidosis, hyperosmolar hyperglycemic state) or complications with a well-established link to diabetes (eg, acute coronary syndrome, stroke, wound infection); there was no statistically-significant difference in enrollment rates between patients whose ED visit was vs. was not for a DM-related complaint (53.8% vs. 60.0%, p=0.8018). No other variables, including whether the patient had newly diagnosed DM, were associated with enrollment. Enrollees with worse baseline glycemic control (A1c ≥11%) had a greater median A1c decrease (3.5% vs. 1.9%) vs. those with less-poor baseline glycemic control (A1c <11%) or those declining the program (p=0.05). Post-recruitment ED visits-per-patient-per-month decreased among patients recruited from the ED (-0.08), but not among those recruited from outpatient settings. (+0.08), p<0.0001). Conclusion ED recruitment to a diabetes DMP is feasible and effective. An ED-based diabetes DMP recruiter had enrollment rates substantially greater than a cold-calling DMP recruiter, comparable to enrollment rates from PCPs and endocrinologists, suggesting the importance of the recruitment framing/context. ED-recruited patients achieved substantial improvements in A1c and future ED visit rates.

15.
J Urban Health ; 97(3): 387-394, 2020 06.
Artigo em Inglês | MEDLINE | ID: mdl-32232654

RESUMO

Methamphetamine use, sexual relationship power (SRP), and partner violence (PV) are associated with increased risk of sexually transmitted infections (STIs) among women. The objective of our study was to examine the association of recent PV and SRP on STIs by partner type among HIV-negative, heterosexual women who use methamphetamine in San Diego, CA. Using baseline survey data from 209 women enrolled in FASTLANE II, an HIV behavioral intervention trial, we conducted logistic regression analyses to examine associations between PV, SRP, and self-reported lifetime STIs (e.g., chlamydia, gonorrhea). Models focused on PV perpetrated within the past 2 months by: (1) spouse, live-in, or steady sexual partners and (2) casual or anonymous sexual partners. Seventy-eight percent of women reported lifetime physical PV and 57% reported lifetime sexual PV. In the past 2 months, 19.6% reported physical and/or sexual violence by a spouse, live-in, or steady sexual partner, and 7.2% reported physical and/or sexual PV by a casual or anonymous partner. Median SRP score was 2.36 (interquartile range: 2.02-2.68). Twenty-six percent of women reported ever being diagnosed with ≥ 1 STI. While recent physical violence and sexual violence were not associated with STI history among women in steady relationships, women who reported recent sexual violence by casual/anonymous partners were approximately 8 times more likely to ever have an STI compared with those with no history of recent PV by casual/anonymous partners (AOR: 7.70; 95% CI: 1.32, 44.84). SRP was not associated with lifetime STIs among women who reported either partner type. Our findings support a relationship between recent sexual violence perpetrated by casual/anonymous partners and women's STI history. Women who use methamphetamine need help in navigating partner violence experiences. Risk reduction interventions to support this marginalized population are needed.


Assuntos
Metanfetamina , Poder Psicológico , Parceiros Sexuais , Infecções Sexualmente Transmissíveis , Maus-Tratos Conjugais , Transtornos Relacionados ao Uso de Substâncias , Adulto , California/epidemiologia , Feminino , Humanos , Masculino , Fatores de Risco , Parceiros Sexuais/psicologia , Infecções Sexualmente Transmissíveis/epidemiologia , Maus-Tratos Conjugais/estatística & dados numéricos , Transtornos Relacionados ao Uso de Substâncias/epidemiologia
16.
ACS Appl Mater Interfaces ; 12(6): 7317-7325, 2020 Feb 12.
Artigo em Inglês | MEDLINE | ID: mdl-31933353

RESUMO

Mixed-dimensional van der Waals nanohybrids (MvNHs) of two-dimensional transition-metal dichalcogenides (TMDs) and zero-dimensional perovskites are highly promising candidates for high-performance photonic device applications. However, the growth of perovskites over the surface of TMDs has been a challenging task due to the distinguishable surface chemistry of these two different classes of materials. Here, we demonstrate a synthetic route for the design of MoSe2-CsPbBr3 MvNHs using a bifunctional ligand, i.e., 4-aminothiophenol. Close contact between these two materials is established via a bridge that leads to the formation of a donor-bridge-acceptor system. The presence of the small conjugated ligand facilitates faster charge diffusion across MoSe2-CsPbBr3 interfaces. Density functional theory calculations confirm the type-II band alignment of the constituents within the MvNHs. The MoSe2-CsPbBr3 nanohybrids show much higher photocurrent (∼2 × 104-fold photo-to-dark current ratio) as compared to both pure CsPbBr3 nanocrystals and pristine MoSe2 nanosheets owing to the synergistic effect of pronounced light-matter interactions followed by efficient charge separation and transportation. This study suggests the use of a bifunctional ligand to construct a nanohybrid system to tune the optoelectronic properties for potential applications in photovoltaic devices.

17.
J Clin Child Adolesc Psychol ; 49(1): 36-49, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-30084657

RESUMO

We utilized a life course framework to examine associations between the accumulation, timing, and duration of adverse childhood experiences (ACEs) across early childhood (ages 1-5 years) and internalizing and externalizing behavior problems at age 9. The sample included 1,789 children from the Fragile Families and Child Wellbeing Study, a birth cohort study of children born between 1998 and 2000. Primary caregivers reported on seven ACEs at child ages 1, 3, 5, and 9. We created 2 summary measures of early childhood ACEs to capture (a) accumulation and (b) timing and duration. We derived indicators of caregiver-reported internalizing and externalizing problems at ages 5 and 9. Logistic regression was used to estimate associations between early childhood ACEs and behavior problems at age 9, sequentially adjusting for sociodemographic covariates, age 9 ACEs, and age 5 behavior problems. In fully adjusted models, children exposed to 6 or more ACEs in early childhood faced 3 times the odds of age 9 behavior problems, compared to children exposed to 0-1 ACE. Intermittent adversity was associated with the greatest increase in odds of age 9 behavior problems, relative to other early childhood timing/duration categories. Categories of high early and high late adversity were also associated with age 9 behavior problems. Chronic adversity was not associated with age 9 behaviors in final models that adjusted for age 5 problems. These results demonstrate the importance of a developmental perspective for understanding the role of childhood adversity in the etiology of child psychopathology.


Assuntos
Experiências Adversas da Infância/métodos , Comportamento Problema/psicologia , Pré-Escolar , Estudos de Coortes , Feminino , Humanos , Masculino
18.
J Interpers Violence ; 35(23-24): 5574-5588, 2020 11.
Artigo em Inglês | MEDLINE | ID: mdl-29294855

RESUMO

Physical and sexual violence are commonly researched as risk factors for human immunodeficiency virus (HIV). However, psychological violence and its relationship with HIV risk behaviors have received limited attention among African American/Black (Black) women. This study examined (a) the frequency of recent (past 3 months) psychological violence, physical violence, and sexual violence and (b) the association of HIV risk behaviors, including unprotected sex, sex under the influence of alcohol/drugs, and sex exchange for money/drugs/shelter, with psychological violence. Participants included 191 women (89.2% Black), who were recruited through information sessions held at community centers, Parent Teacher Association meetings, substance use and HIV counseling centers, radio public service announcements, and word of mouth. Interested women participated in a multisession HIV and substance use prevention program and completed a self-reported assessment at program baseline. The current study utilized baseline data collected for a longitudinal study. Results from descriptive analysis indicated that the rate of psychological violence was higher than physical violence or sexual violence, and it was strongly associated with physical and sexual violence. Furthermore, hierarchical logistic regression analysis showed that unprotected sex was significantly associated with recent psychological violence after controlling for covariates. Findings suggest that recent psychological violence is more common than physical or sexual violence and it relates to sexual risk behaviors among Black women. Recent psychological violence may indicate psychosocial and sexual vulnerability for HIV and warrants particular attention among Black women.


Assuntos
Negro ou Afro-Americano , Infecções por HIV , Feminino , Humanos , Estudos Longitudinais , Fatores de Risco , Assunção de Riscos , Comportamento Sexual , Violência
19.
Trauma Violence Abuse ; 21(2): 311-325, 2020 04.
Artigo em Inglês | MEDLINE | ID: mdl-29649966

RESUMO

Intimate partner violence (IPV) victimization is a global public health issue and has serious consequences of women's health. While scholars and researchers have made some progress in addressing IPV and its impact across different levels of care, there is a paucity of intervention research in this area. For example, we know little about which intervention models work best for particular groups of IPV survivors. Previous reviews have concluded there is insufficient evidence to recommend specific treatment options for victims, but they have also been limited in scope of target populations or have employed narrow eligibility criteria. This systematic review examined the efficacy and effectiveness of interventions for victims of IPV related to physical and mental health and revictimization. Three large databases were searched and articles were selected using specified criteria. Fifty-seven articles met inclusion criteria. Results indicate that both empowerment-based advocacy and cognitively focused clinical interventions demonstrate positive outcomes on the vast sequelae of violence in the context of an intimate relationship. The heterogeneity of intervention approaches and frameworks makes comparisons across studies challenging, but this review demonstrates that interventions focused on problem-solving/solution seeking, enhanced choice making and the alteration in distorted self-thinking and perception are promising in facilitating and maintaining positive physical and mental health changes for women who experience violence.


Assuntos
Vítimas de Crime/psicologia , Violência por Parceiro Íntimo/psicologia , Terapia Cognitivo-Comportamental , Empoderamento , Feminino , Humanos , Violência por Parceiro Íntimo/prevenção & controle , Masculino , Pesquisa/tendências , Sobreviventes/psicologia , Saúde da Mulher
20.
J Womens Health (Larchmt) ; 29(8): 1142-1149, 2020 08.
Artigo em Inglês | MEDLINE | ID: mdl-31721639

RESUMO

Background: We examined whether experiencing more types of lifetime intimate partner violence (IPV) was independently associated with the effectiveness level of the contraceptive method women chose following an abortion. Materials and Methods: Using data on 245 women who were attending an urban hospital abortion clinic, we assessed whether women had ever experienced emotional, physical, or sexual IPV. Effectiveness of women's post-abortion contraceptive method selection was categorized into high (intrauterine device [IUD] and implant), moderate (pill, patch, ring, and shot), and low (condoms, emergency contraception, and none) effectiveness. Using multinomial logistic regression, we examined the relationship between number of types of IPV experienced and post-abortion contraceptive method effectiveness, adjusting for sociodemographics, prior abortion, having children, abortion trimester, importance of avoiding pregnancy in the next year, pre-abortion psychological distress, and effectiveness level of the contraceptive method women were planning to use before contraceptive counseling. Results: Twenty-seven percent (27%) of women experienced two or three types of IPV, 35% experienced one IPV type, and 38% experienced no IPV. Compared to women with no histories of IPV, women who experienced two or more types of IPV during their lifetimes were more likely to choose contraceptive methods with moderate effectiveness (adjusted odds ratio [AOR] = 5.23, 95% confidence interval [CI]: 1.13-24.23, p = 0.035) and high effectiveness (AOR = 5.01, 95% CI: 1.12-22.39, p = 0.035) than those with low effectiveness. Conclusion: Women who experienced two or more types of lifetime IPV selected more effective contraceptive methods post-abortion. Access to contraceptives that are not partner dependent, including long-acting reversible contraceptives (LARC), may be particularly important for women who have experienced multiple types of IPV.


Assuntos
Aborto Induzido/psicologia , Comportamento Contraceptivo/psicologia , Comportamento Contraceptivo/estatística & dados numéricos , Anticoncepção/métodos , Violência por Parceiro Íntimo/psicologia , Violência por Parceiro Íntimo/estatística & dados numéricos , Contracepção Reversível de Longo Prazo/métodos , Adulto , Anticoncepcionais/administração & dosagem , Estudos Transversais , Feminino , Humanos , Gravidez , Inquéritos e Questionários
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