Holodirected coordination sphere around lead(II) in three-dimensional polymeric structure; New precursor for preparation of lead oxide sulfate nano-structures

A new lead(II) three-dimensional coordination polymer, [Pb-2(mu(3)-ANS)(2)(mu(2)-Cl)(2)(H2O)(2)](n) (1) [ANS(-) = 4-amino-1 -naphthalenesulfonateb has been synthesized and characterized. The single-crystal X-ray data of compound 1 shows only one type of Pb-II ion with coordination number of six, the lead atom has distorted octahedral coordination sphere containing stereo-chemically inactive electron lone pair. The thermal stability of 1 was studied by TG-DTA (Thermo gravimetric and differential thermal analyses). Regular morphology of Pb-2(SO4)O nano-particle was prepared from fine powders of compound 1 by calcination process at 700 degrees C. This nano-structure was characterized by XRD (X-ray powder diffraction) and SEM (Scanning electron microscopy).University of Tehran (01/1/389845

Shape Control of Zn(II) Metal–Organic Frameworks by Modulation Synthesis and Their Morphology-Dependent Catalytic Performance

Micro- and nanorods and plates of three porous Zn­(II)-based metal–organic frameworks, [Zn₂(oba)₂(4-bpdb)]_<i>n</i>·2­(DMF) (TMU-4), [Zn­(oba)­(4-bpdh)_0.5]_<i>n</i>·1.5­(DMF) (TMU-5), and [Zn­(oba)­(4-bpmb)_0.5]_<i>n</i> 1.5­(DMF) (TMU-6) were synthesized by the coordination modulation method. The effects of concentration of modulator, temperature, and time of reaction on size and morphology have been investigated. Also, catalytic performance of TMU-5 nanosized metal–organic framework in Knoevenagel condensation reaction was evaluated

Estimating the prevalence of dyspareunia according to mode of delivery: a systematic review and meta-analysis

The present study aimed to examine the prevalence of dyspareunia in the post-partum period in relation to the mode of delivery. In this systematic review and meta-analysis, published articles until February 2020 were searched through the related key term based on mesh term in national and international databases. In the initial search, 1391 articles were found that after removing duplicate, unrelated or non-English and non-Persian articles, finally 20 studies with a sample size of 11354 of women who had given birth were introduced in this study. The prevalence of dyspareunia following vaginal delivery, C-section, and instrumental delivery with 95%CI was 42%(31–56%), 26%(19–34%), and 37%(28–46%) respectively. In addition, the prevalence of dyspareunia in primiparous was higher than multiparous (34%vs.24%), in breastfeeding women was higher than non-breastfeeding women (48%vs.33%), in women who non-used hormonal contraceptive methods were higher than who used hormonal contraceptive methods (43%vs.35%) and its prevalence was similar in women with and without episiotomy. The results indicated that vaginal delivery, breastfeeding, used hormonal contraceptive and primiparity have an impact on dyspareunia. Thus, considering the high prevalence of dyspareunia, and its impact on the quality of life of couples in the postpartum period, attention to, planning, and designing effective interventions in this regard are essential.IMPACT STATEMENT What is already known on this subject? Dyspareunia is one of the common experiences of women in the post-partum period. One of the most important factors affecting dyspareunia in the post-partum period is the mode of delivery. What do the results of this study add? The present study adds to examine the prevalence of dyspareunia in the postpartum period in terms of the mode of delivery. So far, no study has been found which comprehensively and systematically estimating the prevalence of dyspareunia in relation to the type of delivery mode in women who have given birth recently. In addition to the type of delivery the prevalence of dyspareunia was estimated based on parity, breastfeeding, episiotomy and consumption of hormonal contraceptive status. What are the implications of these findings for clinical practice and/or further research? This finding will be a small step to familiarise physicians and midwives as well as people with the relationship between delivery mode and dyspareunia. In addition, in the absence of medical indications and the possibility of choosing the mode of delivery selectively, help them decide and choose the appropriate method of termination of labour and ultimately improve the mental and physical health of the birthing person, family and community