Zinc(II)-Based Ring-and-Rod Coordination Layer as an Excitation-Wavelength-dependent Dual-Emissive Chemosensor for Discriminating Fe3+, Cr3+, and Al3+ in Water.

The reactions of Zn(NO3)2, 3,6-bis(pyridin-3-yl)-9H-carbazole (bpycz), and 2,5-dihydroxyterephthalic acid (H4dhbdc) or 2-bromoterephthalic acid (Br-1,4-H2bdc) under hydro(solvo)thermal conditions yielded corresponding coordination polymers (CPs) {[Zn(H2dhbdc)(bpycz)]•0.5H2O}n (1) and [Zn(Br-1,4-bdc)(bpycz)]•2DMAc•H2O (2), respectively, with high thermal stability approaching 350 °C. CP 1 adopts a ring-and-rod layer structure, which is topologically described as a 4-connected net with the point symbol of 2•65. Two layers are interpenetrated in parallel interlocking mode to form a double 2D → 2D polyrotaxane entanglement with extra-framework void space of 19.6%. CP 2 has a non-interpenetrating ring-and-rod layer structure of 4-connected 2•65 net topology, with extra-framework void space of 16.6%. Thermally activated 1 and 2 revealed CO2 uptakes of 101.1 and 98.6 cm3 g-1, respectively, at P/P0 = 1 and 195 K. X-ray powder diffraction (XRPD) patterns confirmed that 1 and 2 both possessed high chemical stability in H2O, CH3OH, acetone, and DMF, and framework stability during gas adsorption-desorption. The H2O suspension of 1 displayed excitation-dependent dual-emissive properties, appearing at 432 nm upon excitation at 300 nm and at 528 nm upon excitation at 365 nm. Of note, 1 was capable of detection of Fe3+, Cr3+, and Al3+ ions in H2O, showing good anti-interference ability, excellent selectivity, and high sensitivity. More interesting, the dual-emissive properties make 1 to be an excellent luminescence chemosensor to screen Fe3+, Cr3+, and Al3+ from a pool of metal ions in H2O upon excitation at 300 nm via luminescence quenching effect and then discriminate Fe3+, Cr3+, and Al3+ upon excitation at 365 nm via luminescence quenching, unaltered, and enhancement responses, respectively. On the other hand, the H2O suspension of 2 demonstrated an excitation-independent emission appearing at around 430 nm, which could be utilized to sensitively detect Fe3+ and Cr3+ ions with good anti-interference ability and excellent selectivity via luminescence quenching effect. Further, 1 and 2 were recyclability and possessed cycling stability. The plausible sensing mechanisms for 1 and 2 toward Fe3+, Cr3+, and Al3+ were also explored in detail.

Plan-view transmission electron microscopy specimen preparation for atomic layer materials using a focused ion beam approach.

Using the focused ion beam (FIB) to prepare plan-view transmission electron microscopy (TEM) specimens is beneficial for obtaining structural information of two-dimensional atomic layer materials, such as graphene and molybdenum disulfide (MoS2) nanosheets supported on substrates. The scanning electron microscopy (SEM) image in a dual-beam FIB-SEM can accurately locate an area of interest for specimen preparation. Besides, FIB specimen preparation avoids damages and hydrocarbon contamination that are usually produced in other preparation methods, in which chemical etching and polymer adhesion layers are used. In order to reduce harmful ion-beam bombardment and re-deposition on the thin atomic layers during FIB specimen preparation, we develop a method to protect the atomic layers by making a "microcapsule" to insulate the sample surface. The method is applied respectively to prepare plan-view TEM specimens of a graphene sheet with multiple adlayers and MoS2 atomic layers. Useful electron diffraction results can be obtained from these specimens for understanding the interlayer orientation relationships in the two materials. Auger electron spectroscopy analysis further confirms that the sample surface is free from contamination under the sufficient protection given by the proposed method.

Validity and reliability of the Chinese version of the Sheehan Disability Scale (SDS-C).

INTRODUCTIONS: This study aims to evaluate the validity and reliability of the Chinese version of the Sheehan Disability Scale (SDS-C) among depression patients in Taiwan. METHODS: To validate the SDS-C, two samples were selected: Sample 1 (n = 78) consisted of patients diagnosed with Depressive Disorder, while sample 2 (n = 63) consisted of a nondepressive population. Sample 1 was evaluated with SDS twice with 7-14 days interval to measure test-retest reliability. Both samples were also evaluated with The Centre for Epidemiologic Studies Depression Scale (CESD), Family APGAR (adaptation, partnership, growth, affection, resolve) score, the Global Assessment of Functioning (GAF), and brief questionnaire of the World Health Organization Quality of Life instrument (WHOQOL-BREF) and by a psychiatrist. The two samples were combined to measure validity. RESULTS: In concurrent validity, SDS-C scores were significantly correlated with the total score of GAF. The discriminative validity was carried out by comparing the score of SDS-C between subjects with and without current depressive disorder (t = 12.32, df = 139, P < 0.001). Another discriminative validity by receiver-operating characteristic analysis showed the optimal cut-point was >11 (sensitivity: 82.1, specificity: 93.7). The area under the curve was 0.93 (±0.02). For the factor validity, principal components analysis showed that a single factor solution was the best solution accounting for 88.9% of the variance. Regarding the construct validity, SDS-C scores were significantly correlated with CESD, WHOQOL-BREF, and the Family APGAR score. For test-retest reliability, the intra-class correlation coefficient for the total SDS-C score was 0.89 (95% confidence interval 0.82-0.93) and internal consistency Cronbach's alpha was 0.94. DISCUSSION: The SDS-C was found to be a valid and reliable instrument for current depressive disorder patients in Taiwan.

Symptoms of attention deficit hyperactivity disorder and quality of life of mothers of school-aged children: the roles of child, mother, and family variables.

This study examined the impact of inattention and hyperactivity symptoms in children and mothers, opposition problems in children, maternal depression, and perceived family support on the quality of life (QOL) of mothers. Mothers of children in one elementary school were contacted. The relationship between sociodemographic variables, the levels of inattention and hyperactivity symptoms in children and mothers, oppositional symptoms in children, maternal depression, perceived family support, and maternal QOL were examined. Three hundred and eighty-two participants were included in this study. Consistent factors related to the mother's QOL in the four domains were maternal depression, perceived family support, and housing status after controlling for several family, maternal, and child variables. Maternal QOL was more related to her own and family factors including maternal inattention, hyperactivity and depression symptoms, perceived family support, and housing status, instead of parent-rated inattention and hyperactivity symptoms of the child. Screening for maternal inattention, hyperactivity and depression symptoms, and mental health services for these mothers are warranted based on these findings.

High prevalence but low awareness of hepatitis C virus infection among heroin users who received methadone maintenance therapy in Taiwan.

BACKGROUND: This study investigates the prevalence and correlates of hepatitis C virus (HCV) infections among heroin dependent individuals who received methadone maintenance therapy in Taiwan. Also, we investigate users' awareness of HCV. METHODS: Participants were 773 heroin users entering the methadone maintenance treatment (MMT) program at Tsaotun Psychiatric Center in Taiwan. The presence of HCV antibodies was detected. Multivariate logistic regression was used to identify the relationship between HCV infection and correlates. RESULTS: The prevalence of HCV infection was 90.8%. All participants who were HIV-positive were also infected with HCV. Multivariate logistic regression analysis showed that the route of heroin administration (injection), HIV-infection, and criminal records were significantly related to HCV infection. Few (34.8%) HCV positive heroin users were aware of their infection. CONCLUSION: An extremely high prevalence of HCV infection but low awareness of their infection status was found among MMT patients in Taiwan. These findings highlight the importance of education regarding risky behaviors and the necessity for HCV treatment for this population in Taiwan.

Parent-child interaction of mothers with depression and their children with ADHD.

Attention deficit/hyperactivity disorder (ADHD) is a developmental disorder that may have a chronic and pervasive impact on the child's function and cause long-term stress to parents. A higher rate of depression is associated with mothers of children with ADHD. This observational study aimed to investigate the effect of maternal depression and the child's ADHD on the quality of the parent-child interaction in children with ADHD and their mothers with depression. The study participants comprised 39 mother-son dyads including children with ADHD and mothers with depression, children with ADHD and mothers without depression, and children without ADHD and mothers without depression. The Specific Affect Coding System, 20-code version was used to code interactional affect, including positive engagement, negative engagement, negative disengagement, and neural affect. There were no statistically significant group-by-context interaction effects or group effects on all affective variables between the group of children with ADHD and mothers without depression and the group of children without ADHD and mothers without depression. Stimulant medication may account for these nonsignificant findings. No significant difference of positive affect between neutral and conflict-solving contexts was observed in depressed mothers whose children were diagnosed as ADHD. Children with ADHD whose mothers were depressed were less positive in their parent-child interaction compared with children in the other groups. Maternal depression may play an important role in the affective presentation of dyads of children with ADHD and mothers with depression. Implications for clinical practice and future research are provided.

A meta-analysis of behavioral parent training for children with attention deficit hyperactivity disorder.

This meta-analysis examined the effect of behavioral parent training on child and parental outcomes for children with attention deficit hyperactivity disorder. Meta-analytic procedures were used to estimate the effect of behavioral parent training on children with attention deficit hyperactivity disorder. Variables moderating the intervention effect were examined. Forty studies were included and generated an overall moderate effect size at post-treatment and a small effect size at follow-up. The majority of outcome categories were associated with a moderate effect size at post-treatment that decreased to a small effect size at follow-up. Parenting competence was the only outcome that had a large effect, which decreased to moderate at follow-up. The strength of the effect differed between questionnaire and observation measures. Behavioral parent training is an effective intervention for children with attention deficit hyperactivity disorder. Sustainability of the effects over time is a problem that awaits further scrutiny. Recommendations for further research and clinical practices are provided.

Psychometric comparisons of the Stroke Impact Scale 3.0 and Stroke-Specific Quality of Life Scale.

PURPOSE: This study compared the responsiveness and criterion-related validity of the Stroke Impact Scale (SIS) and Stroke-Specific Quality of Life Scale (SS-QOL) for patients after stroke rehabilitation. METHODS: The SIS and SS-QOL, along with five criterion measures-the Fugl-Meyer Assessment, the Motor Activity Log, the Functional Independence Measure, the Frenchay Activities Index, and the Nottingham Extended Activities of Daily Living Scale-were administered to 74 patients with stroke before and after a 3-week intervention. Responsiveness was examined using the Wilcoxon signed rank test and standardized response mean (SRM). Criterion-related validity was investigated using the Spearman correlation coefficient (rho). RESULTS: Whereas the SS-QOL subscales were nonresponsive to changes, the SIS hand function showed medium responsiveness (SRM = .52, Wilcoxon Z = 4.24, P < .05). Responsiveness of the SIS total also was significantly larger than that of the SS-QOL total (SRM difference, .36; 95% confidence interval, .02-.71). Criterion validity of the SIS hand function was good (rho = .51-.68; P < .01), but that of the SS-QOL was only fair (rho = .25-.31; P < .05). CONCLUSION: Because the SIS had better overall responsiveness and the SIS hand function showed medium responsiveness and good criterion validity, the SIS appears to be more suited for assessing changes after stroke rehabilitation.

Quality of life in mothers of children with oppositional defiant symptoms: a community sample.

Background Children with oppositional defiant symptoms (ODS) are highly related to parental stress, especially in mothers. This study is the first to investigate the quality of life (QOL) of mothers of children with ODS in a community sample.Methods Randomly selected mothers of children attending an elementary school were contacted, and 387 who completed the questionnaire participated in this study. The children's ODS status was determined by the maternal rating of the Chinese Swanson, Nolan, and Pelham rating scale, version IV. The mothers' QOL was estimated by maternal reports from the World Health Organization Quality of Life - BREF (WHOQOL-BREF) instrument. The relationship between the children's ODS status and maternal QOL was examined by analysis of covariance (ANCOVA) with the participants' sociodemographic factors as covariables.Results Sixty-three children, mostly boys, met the screening criteria for ODS. The positive screening rate for ODS was 16.49%. The children's ODS status was a significant predictor for the maternal physical capacity, psychological wellbeing and environment domains of QOL. Mothers of children with ODS who rented a house were younger and had lower education levels and worse QOL in all domains.Conclusion A high positive screening rate for ODS children in the elementary school and a relationship between poor maternal QOL and children's ODS were found in this study. Routine screening for ODS in children and mental health services for these children and their mothers are warranted.