J-aggregation of 3,3-disulfopropyl-5,5-dichlorothiacyanine dye on colloidal silver particles with different properties

Наночестице сребра коришћене у овој докторској дисертацији синтетисане су у воденој средини помоћу различитих редукционих средстава, као што су натријум-борхидрид, тринатријум-цитрат и цетил-триметил-амонијум-бромид. Употребом ових метода добијене су наночестице сферног и штапићастог облика различитих величина и површинске покривености...Silver nanoparticles in aqueous solution were synthesized by reduction of silver nitrate using various reducting agents such as sodium borohydride, trisodium citrate and cetyl trimethyl ammonium bromide. Silver nanospheres and nanorods with a different size and surface coverage were obtained. Silver colloidal sol was characterized using various experimental methods: transmission electron microscopy, UV-vis spectroscopy, fluorescence and Raman spectroscopy, atomic force microscopy, dynamic light scattering, and zeta potential measurements. The interaction between synthesized silver nanoparticles and anionic cyanine dye (3,3’-disulfopropyl-5,5’-dichlorothiacyanine dye, TC) in aqueous solution was studied..

Disciplining dissent: multicultural policy and the silencing of Arab-Canadians

This article examines two cases of state funding cuts to the most prominent and active Arab community organisations operating in Canada, the Canadian Arab Federation and Palestine House. It contextualises the cuts within broader ‘crisis of multiculturalism’ debates imbued with anti-Arab/anti-Muslim racism and the silencing of Palestine advocacy efforts; arguing that the shift to a neoliberal multiculturalism, emptied of anti-racist politics, along with the construction of national identities around a set of western ‘core values’ has advanced a marginalising politics that demarcates a ‘civilisational’ border which excludes Arabs, Muslims, and by extension Palestine solidarity. Curtailing freedom of expression, partly through funding cuts, thus becomes a key mechanism for disciplining dissent in racialised communities

Prevalence and predictors of health service use among Iraqi asylum seekers in the Netherlands

BACKGROUND. A long asylum procedure is associated with higher prevalence rates of psychiatric disorders, lower quality of life, higher disability and more physical health problems. Additional knowledge about health seeking behavior is necessary to guide governments and health professionals in their policies. OBJECTIVE. To measure service use among one of the biggest asylum seekers population in the Netherlands and to assess its relationships with predisposing and need variables (including post-migration living problems). METHOD. Two groups were randomly selected: Group 1 (n = 143), less than 6 months and Group 2 (n = 151), more than 2 years in the Netherlands. Respondents were interviewed with fully structured, culturally validated, translated questionnaires, which contained instruments to measure psychiatric disorders, quality of life, disability, physical health and post-migration living problems. Use of preventive and curative (physical and mental) health services was measured and the relationship with predisposing and need risk factors was estimated with univariate and multivariate logistic regression analyses. RESULTS. A long asylum procedure is not associated with higher service use, except for mental health service use and drug use. Use of mental health services is, however, low compared to the prevalence of psychiatric disorders. Low quality of perceived general health and functional disability are the most important predictors of services use. Psychopathology predicts use of a medical specialist (non-psychiatrist), but does not predict mental health service use. CONCLUSION. A high percentage of asylum seekers with a psychiatric disorder is not getting adequate treatment. There is a mismatch between the type of health problem and the type of health service use. The various health services should work together in education, detection, referral and care in order to provide help to this group of patients.De Open Ank

Synthesis and crystal structure of Ca0.9Er0.1MnO3

Ca0.9Er0.1MnO3 nanopowders with perovskite type crystal structure were synthesized by sucrose-nitrate procedure (SNP). SNP is a combustion method in which sucrose C12H22O11 was used as fuel, while calcium nitrate tetrahydrate Ca(NO3)2×4H2O, manganese(II) nitrate hydrate Mn(NO3)2×H2O, erbium(III) nitrate pentahydrate Er(NO3)3×5H2O were used as oxidants. Obtained powder Ca0,9Er0,1MnO3 were calcinated at a temperature between 800–1000 °C. Powder properties have been studied, such as crystallite and particle size, lattice parameters, structural changes, and specific surface area. X-ray diffraction (XRD), Field emission scanning electron microscopy (FESEM), and Brunauer-Emmet-Teller (BET) method were used to characterize the synthesized samples at room temperature. Also, high temperature treatment (up to 1000 °C) was used to follow the stability of solid solutions and the growth of crystallites

Experimental ionization of atomic hydrogen with few-cycle pulses

We present the first experimental data on strong-field ionization of atomic hydrogen by few-cycle laser pulses. We obtain quantitative agreement at the 10% level between the data and an {\it ab initio} simulation over a wide range of laser intensities and electron energies

Synthesis and characterization of quercetin-conjugated gold nanoparticles

Gold nanoparticles and quercetin-conjugated gold nanoparticles complex were synthesized using trisodium citrate as reducing agent. Both kinds of nanoparticles were characterized using spectrophotometry, dynamic light scattering and zeta potential measurements. Comparison of the results confirmed successful synthesis of quercetin-conjugated gold nanoparticles complex.Physical chemistry 2018 : 14th international conference on fundamental and applied aspects of physical chemistry; Belgrade (Serbia); 24-28 September 2018

Work Life Balance Among Nurse Educators Towards Quality Life: A Mixed Method Study

Work-Life balance is completely an imminent problem that needs to be addressed across all organizations. The nursing field, especially nurses in the Academe is not excused due to multiple roles they are facing. This study was intended to determine and explore the work life balance among nurse educators towards quality life. The respondents of the study were the nurse educators of the Schools of Nursing in the city Baguio and the province of Benguet, Philippines. The research utilized Mixed Method design specifically, sequential explanatory strategy. It was found out that work-life balance of nurse educators vary and that nurse educators can maintain their composure in their work with or without interference with personal life or vice versa despite their very complex roles. Further exploring the verbatim accounts of the participants, the researchers extracted participant

Preparation, synthesis and characterization of nanometric Ca0.9Er0.1MnO3

The present research demonstrates the synthesis and characterization of Ca0.9Er0.1MnO3 perovskite powder using the sucrose nitrate procedure (SNP) technique. The following substances were used to obtain this complex perovskite: sucrose C12H22O11, which has a dual role (complexant and fuel), and metal nitrates were used as oxidants - calcium nitrate tetrahydrate Ca(NO3)2×4H2O, manganese(II) nitrate hydrate Mn(NO3)2×H2O, erbium(III) nitrate pentahydrate Er(NO3)3×5H2O. Nanopowder was prepared by combining metal nitrates in their respective stoichiometric ratios. The synthesized Ca0.9Er0.1MnO3 powder was calcined in a temperature range of 800–1000 °C for a period of 15 min. The effects of calcination were characterized through different experimental techniques (differential thermal analysis (DTA), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Field emission scanning electron microscopy (FESEM), and inductively coupled plasma (ICP))

Comparison of self-reported health & healthcare utilisation between asylum seekers and refugees: an observational study

<p>Abstract</p> <p>Background</p> <p>Adult refugees and asylum seekers living in Western countries experience a high prevalence of mental health problems, especially post traumatic stress disorder (PTSD), depression and anxiety. This study compares and contrasts the prevalence of health problems, and potential risk factors as well as the utilisation of health services by asylum seekers and refugees in the Irish context.</p> <p>Methods</p> <p>Cross sectional study using validated self reported health status questionnaires of adult asylum seekers (n = 60) and refugees (n = 28) from 30 countries, living in Ireland. Outcome measures included: general health status (SF-36), presence of PTSD symptoms and anxiety/depression symptoms. Data on chronic conditions and pre or post migration stressors are also reported. The two groups are compared for utilisation of the health care system and the use of over the counter medications.</p> <p>Results</p> <p>Asylum seekers were significantly more likely than refugees to report symptoms of PTSD (OR 6.3, 95% CI: 2.2–17.9) and depression/anxiety (OR 5.8, 95% CI: 2.2–15.4), while no significant difference was found in self-reported general health. When adjusted by multivariable regression, the presence of more than one chronic disease (OR 4.0, 95%CI: 1.3–12.7; OR 3.4, 95% CI: 1.2–10.1), high levels of pre migration stressors (OR 3.6, 95% CI: 1.1–11.9; OR 3.3, 95% CI: 1.0–10.4) or post migration stressors (OR 17.3, 95% CI: 4.9–60.8; OR 3.9, 95% CI: 1.2–12.3) were independent predictors of self reported PTSD or depression/anxiety symptoms respectively, however, residence status was no longer significantly associated with PTSD or depression/anxiety. Residence status may act as a marker for other explanatory variables; our results show it has a strong relationship with post migration stressors (χ²= 19.74, df = 1, P < 0.001).</p> <p>In terms of health care utilisation, asylum seekers use GP services more often than refugees, while no significant difference was found between these groups for use of dentists, medication, hospitalisation or mental health services.</p> <p>Conclusion</p> <p>Asylum seekers have a higher level of self reported PTSD and depression/anxiety symptoms compared to refugees. However, residence status appears to act as a marker for post migration stressors. Compared to refugees, asylum seekers utilise GP services more often, but not mental health services.</p