Synthesis, characterization, and self-assembly of fluorescent fluorine-containing liquid crystals.

SN Ar has been used to synthesize various functionalized derivatives of pentafluorobenzenes which are highly specific at the para position; and consequently are ideal for building calamitic (rod-like) liquid crystalline molecular systems. Here, we display the effectiveness of SN Ar chemistry as a convenient method toward the synthesis of fluorescent liquid crystalline perfluorinated comprising ethers and thioethers in excellent yields and high purity. In the current work, we describe the synthesis, self-assembly, and mesogenic properties of new perfluorinated para-terphenyls bearing various para-substituted alkoxy and thioalkoxy chains. The terphenyl core was prepared using Cu(I) (or Cu(I)/phenanthroline)-catalyzed decarboxylative carbon-carbon (or carbon-oxygen [sulfur]) cross-coupling from the analogous aromatic iodide and fluorobenzoate potassium salt. The molecular structures of the prepared perfluorinated terphenyls were demonstrated with 1 H, 13 C, and 19 F NMR, as well as FT-IR and X-ray crystallography. The liquid crystalline properties and mesogenic phases were characterized with differential scanning calorimetry and high-resolution polarized optical microscope. Both UV-visible absorbance and emission spectra demonstrated solvatochromism. Supramolecular self-assembly of the generated perfluorinated para-terphenyls was monitored by van der Waals and π-π stacking interaction forces. The creation of nanofibrous architectures was monitored by scanning electron microscopy.

Quality of life among caregivers of asthmatic children attending pulmonology clinics at Hamad General Hospital, Qatar.

INTRODUCTION: Chronic paediatric diseases, as bronchial asthma, affect the quality of life, which can be defined as the ability to preserve personal well-being despite sickness. These diseases have a huge impact on the quality of life of both the children, their parents and or caregivers. METHODOLOGY: A cross-sectional study using convenient sampling was conducted in the paediatric pulmonology clinics at Hamad General Hospital in Qatar aiming to evaluate the quality of life among caregivers of asthmatic children. The quality of life of caregivers was assessed using the standard Paediatric Asthma Caregiver Quality of Life questionnaire. Depression and asthma control were assessed using the Beck Depression Inventory; second edition and the Paediatric Asthma Control and Communication Instrument, respectively. RESULTS: Total number of the caregivers was 330. Majority of the asthmatic children had controlled or partially controlled asthma (47% and 44%, respectively). Most of the caregivers had either very good or good quality of life (63% and 31%, respectively). Mean quality of life score was 5.55 ± 1.14. Males, married and father caregivers had significantly higher mean quality of life. In addition, gender, getting bothered about child's asthma, asthma control score and depression score were significant predictors of quality of life among the caregivers. CONCLUSION: Most of the caregivers had either very good or good quality of life. Being a female, degree of asthma control and depression were important determinants of the quality of life of the caregivers. Provision of needed support to caregivers and effective approach to controlling asthma are recommended to improve the quality of life of caregivers.

Insomnia symptoms and their correlates among the elderly in geriatric homes in Alexandria, Egypt.

The prevalence of sleep complaints increases steadily with age. Studies investigating insomnia among elderly people living in geriatric homes, especially among Egyptians, are scarce. This study aimed to determine the prevalence of insomnia symptoms among the elderly living in geriatric homes in Alexandria and their correlates. A cross-sectional survey of a representative sample of elderly population of geriatric homes in Alexandria was implemented. A total of 177 persons aged 60 years or older participated. Difficulty initiating sleep was reported by 65% of the participants. Approximately half of them had difficulty maintaining their sleep (50.8%) or had non-restful sleep (51.4%). Short sleep was reported by 43.5% of the participants, while early morning awakening was reported by 28.2%. Advanced age (> or = 75 years) was significantly associated with increased risk for early morning awakening, non-restful sleep and short sleep. Women had approximately a fourfold risk of non-restful sleep as opposed to men. Short stay in geriatric homes (<1 year) was associated with 2.5-fold increased risk of non-restful sleep. Unmarried status was strongly and positively related to difficulty to maintain sleep and non-restful sleep. Depressive status was significantly associated with an increased risk of difficulty to maintain sleep and decreased risk of early morning awakening. Conclusively, the present study showed that insomnia symptoms are highly prevalent among the elderly living in geriatric homes. It also revealed that although age, gender, and other socio-demographic factors are correlated with insomnia symptoms, other factors are highly important. Health care providers should take these factors in consideration when dealing with elderly patients who complain of insomnia.

Women health in poor urban settings in Alexandria.

The aim of this paper is to investigate women health and status as well as to study gender gap in three poor urban settings in Alexandria. Poor families were identified and invited to participate in the study through the help of local informants. The study included 172 families, 53 from Abu-Kir, 57 from El-Dahreya and 62 from Wadi El-Kamar area. An interviewing questionnaire was used to collect data form the wives as well as their husbands about household family members. Wives and husbands who participated in the study were clinically examined. Their weight and height were measured. For those who accepted to participate, stool, urine and blood analyses were performed. Female to male comparison as well as sex ratio of some parameters were used to investigate gender gap. Results showed that females were the head of the family in 19.8% of the families. In 18% of the families, wives participated in the family income. Illiteracy represented 94.2% among females aged 45+ years, and unemployment was 97.4%. The rate of ill health increased with age from 36% for girls to 90% among older women (45+) compared to 71% among older males. Cardiovascular and orthopedic disorders represented the most reported problems among older females and males. Diarrhea and ARI episodes were rather more frequent among females than among males. About 60% of examined women suffered from obesity, 45% had gynecological problems, 38% had parasitic infections in stool, and 45% had anemia. Female to male sex ratio was low for <6 and 60+ years old. In conclusion, poor women suffer from high burden of socio-economic disadvantage, gender inequality and ill-health.