Polymeric versus lipid nanocapsules for miconazole nitrate enhanced topical delivery: in vitro and ex vivo evaluation

Nanocapsules can be equated to other nanovesicular systems in which a drug is entrapped in a void containing liquid core surrounded by a coat. The objective of the present study was to investigate the potential of polymeric and lipid nanocapsules (LNCs) as innovative carrier systems for miconazole nitrate (MN) topical delivery. Polymeric nanocapsules and LNCs were prepared using emulsification/nanoprecipitation technique where the effect of poly(ε-caprolactone (PCL) and lipid matrix concentrations with respect to MN were assessed. The resulted nanocapsules were examined for their average particle size, zeta potential, %EE, and in vitro drug release. Optimum formulation in both polymeric and lipidic nanocapsules was further subjected to anti-fungal activity and ex vivo permeation tests. Based on the previous results, nanoencapsulation strategy into polymeric and LNCs created formulations of MN with slow biphasic release, high %EE, and improved stability, representing a good approach for the delivery of MN. PNCs were best fitted to Higuchi’s diffusion while LNCs followed Baker and Lonsdale model in release kinetics. The encapsulated MN either in PNCs or LNCs showed higher cell viability in WISH amniotic cells in comparison with free MN. PNCs showed less ex vivo permeation. PNCs were accompanied by high stability and more amount drug deposition (32.2 ± 3.52 µg/cm²) than LNCs (12.7 ± 1.52 µg/cm²). The antifungal activity of the PNCs was high 19.07 mm compared to 11.4 mm for LNCs. In conclusion, PNCs may have an advantage over LNCs by offering dual action for both superficial and deep fungal infections.     

Synthesis and Characterization of Imidazolium-Based Ionic Liquids and Evaluating Their Performance as Asphaltene Dispersants

With the projected increase in the production of heavy oil due to the energy crisis, asphaltene-related issues are likely to come to the forefront. This leads to operational problems, safety hazards, and oil production deficiencies, resulting in huge economic losses for the petroleum industry. Therefore, in this work, we aimed to inhibit asphaltene precipitation using ionic liquid (IL) compounds. ILs with long alkyl chains can inhibit the precipitation of asphaltene molecules due to the π–π* interactions between them and the formation of hydrogen bonds. A series of imidazolium-based ionic liquids, IL-0, IL-4, IL-10, and IL-16, were synthesized with yield percents of 79, 81, 80, and 83%, respectively. The prepared materials were characterized well using FTIR, ¹H-NMR, and Elemental Analysis. The surface tension, interfacial tension (IFT), and different surface parameters were investigated at different temperatures to simulate the reservoir temperature. IL-0, IL-4, IL-10, and IL-16 displayed their γ_cmc values at 35, 34, 31, and 32 mN/m at 303 °K, respectively. It was found that the prepared ILs are good surfactants with low values of interfacial tension. Quantum structure–activity relationships using Density Functional Theory (DFT) were used to investigate the geometry optimization electronic structures, the energy gap (ΔE), and the reactivity of the cations of the prepared ILs. The synthesized ILs were evaluated as asphaltene dispersants using two different techniques. The viscometric technique showed that the asphaltene onset precipitation was 28.5 vol.%. This percent was postponed to 42.8, 50, 78.5, and 64.3 vol.%, after adding IL-0, IL-4, IL-10, and IL-16, respectively, and the spectroscopic technique confirmed the results.     

Gender Differences in the Amount of Gingival Display During Smiling Using Two Intraoral Dental Biometric Measurements

Purpose: The aims of this study were to compare gender differences in the width and length of the maxillary right central incisor and the horizontal and vertical overlap of the anterior teeth and to determine the relationships of these two intraoral dental biometric measurements with the amount of gingival display during smiling. Materials and Methods: A total of 61 men and 66 women were included in this study. For each participant, the gingival tissue display during smiling was judged to be either visible or not, and the maximum mesiodistal and incisogingival dimensions of the maxillary right central incisor were measured, along with the amount of horizontal and vertical overlap of anterior teeth using a digital caliper. Gender differences in these parameters and the relationship between subjects showing gingival display when smiling and the two intraoral dental biometric measurements were determined. Statistical analyses of data were performed using SPSS (V11) software. The mean scores for gender were calculated, and a Student's t‐test was used to identify significant differences between both groups. Significance level was set to 0.05. Results: The age of the participants ranged between 23 and 52, with a mean of 33.47 ± 9.07 years. A relatively small percentage of the subjects (22.05%) displayed gingiva when smiling. More women displayed gingiva when smiling than men, with a 2:1 female:male ratio. Men exhibited significantly (p < 0.05) wider (8.76 ± 0.66 mm) and longer (10.28 ± 0.88 mm) central incisors compared to women (7.92 ± 0.72 mm; 9.27 ± 0.93 mm width and length, respectively). No gender differences were found in the width‐to‐length ratio. Subjects with gingival display had significantly more horizontal (4.28 ± 1.21 mm; p < 0.001), and vertical (3.52 ± 0.66 mm; p < 0.05) overlap of anterior teeth compared to those who did not display gingiva when smiling (2.40 ± 1.03 and 2.30 ± 0.93 mm, respectively). Conclusions: Significantly more women displayed gingiva in smiling. Men had significantly wider and longer central incisors. No differences were recorded between men and women relative to both the horizontal and vertical anterior tooth overlap. Subjects who displayed gingiva when smiling had more horizontal and vertical overlap of anterior teeth.     

The impact on mothers of bringing up a child with intellectual disabilities: a cross-cultural study

BACKGROUND: Most research into the impact on mothers of having a child with an intellectual disability has been done in Western cultures. These mothers are at increased risk of stress, along with poorer health and weakened family relationships. Nurses are well placed to support these mothers. OBJECTIVES: (1) To describe across three different cultures-Irish, Taiwanese and Jordanian-the inter-relationships among three indicators of maternal well-being. (2) To identify the coping strategies of mothers and the professional and informal supports available to them. (3) To identify the variables that have a negative impact on maternal well-being and possible moderating influences on them. DESIGN: A survey approach with three groups of self-selected mothers. PARTICIPANTS: The characteristics of the child determined the inclusion criteria; namely aged 5-18 years with a diagnosis of intellectual disability of such severity that the children attended special schools or centres. In each country, the special services within particular geographical areas were approached and all families known to them were given the opportunity to participate. In all 206 mothers agreed to participate. METHODS: Mothers were interviewed individually at home or in the day centre attended by their child. They completed various rating scales of known reliability and validity. In addition they described in their own words, the impact the child had on their lives and how they coped. RESULTS: In all three countries, mothers experienced poor mental health, increased levels of child-related stress and poorer family functioning which the qualitative data further illuminated. Their child's behaviour problems were a major factor in this. The impacts on mothers' well-being were not alleviated by access to professional supports or use of coping strategies. CONCLUSIONS: Health professionals need to adopt family-centred approaches that embrace the support needs of mothers. Similar strategies would apply across all cultures although they must be responsive to individual need.     

Women's perceptions of reproductive health in three communities around Beirut, Lebanon

The aim of this study was to elicit definitions of the concept of reproductive health among women in three communities around Beirut, Lebanon, as part of the reproductive health component of a larger Urban Health Study. The communities were characterised by poverty, rural-urban mobility and heterogeneous refugee and migrant populations. A random sample of 1,869 women of reproductive age completed a questionnaire, of whom a sub-sample of 201 women were randomly selected. The women's understanding of good reproductive health included three major themes, which were expressed differently in the three communities. Their understanding included good physical and mental health, and underscored the need for activities promoting health. Their ability to reproduce and raise children, practise family planning and birth spacing, and go through pregnancy and motherhood safely were central to their reproductive duties and their social status. Finally, they saw reproductive health within the context of economic status, good marital relations and strength to cope with their lives. These findings point to the need to situate interventions in the life course of women, their health and that of their husbands and families; the importance of reproduction not only from a health services point of view, but also as regards women's roles and responsibilities within marriage and their families; and taking account of the harsh socio-economic conditions in their communities.     

Syrian women's perceptions and experiences of ultrasound screening in pregnancy: implications for antenatal policy

Ultrasound scanning is firmly embedded in antenatal maternity care around the world. This paper reports on a qualitative study carried out in 2003 of 30 Syrian women's perceptions and experiences of routine ultrasound in pregnancy. It was part of a larger study of the experiences of pregnancy and childbirth of 500 women from Damascus and its suburbs who had recently given birth to healthy newborns. The women had had multiple scans during pregnancy and accepted its use uncritically nearly all the time. The scans gave them reassurance that the baby was healthy, the pregnancy was progressing well and allowed them to learn the sex of the baby. The women also reacted positively to the antenatal educational messages that were conveyed using scans. However, we found the excessive use of this technology worrying. We believe private doctors, who attend 80% of pregnant women, use ultrasound primarily to attract women to their clinics and increase their income. We recommend that maternity care in Syria should be better regulated; that women and their doctors should be made aware of the essential components of antenatal care; that notional guidelines for antenatol care should be developed and that Syrian women should be empowered to ask questions about pregnancy and childbirth and the care they receive.     

Role of 320-MDCT in assessment of cardiac great arteries anomalies

Objectives

To assess the role of 320 MDCT angiography in the evaluation of extra cardiac, vascular anomalies of great arteries and compare its results with transthoracic echocardiography and its impact on treatment planning.