Eth­oxy­carbonyl­methyl 3-(4-chloro­benzyl­idene)dithio­carbazate

Mol­ecules of the title compound, C12H13ClN2O2S2, are linked into centrosymmetric dimers by pairs of inter­molecular N—H⋯S hydrogen bonds. In the crystal structure, there are π–π stacking inter­actions between symmetry-related benzene rings with a centroid–centroid distance of 3.7305 (13) Å, a perpendicular distance between the planes of 3.2851 (9) Å and a slippage of 1.768 Å. The structure is further stabilized by weak inter­molecular C—H⋯O hydrogen bonds

The results of photorefractive keratectomy with Mitomycin-C in myopia correction after five years

Objective: To evaluate the results of photorefractive keratectomy (PRK) with mitomycin C in myopia correction after five years. Methods: This is a cross sectional study which included 145 eyes of 74 patients in 18 to 51 years age group that were undergoing Photorefractive keratectomy with mitomycin C using Allegretto Wave Eye-Q 400-Hz excimer laser platform in Markazi Eye Center, Tehran, Iran. All the surgical procedures were performed by the same surgeon. After five years follow-up evaluation including BCVA, UCVA, Refractive error measurement and external eye examination was performed. Results: The mean diopter of spherical equivalent before surgery was -3.40±1.73. The following findings were obtained after 5 years follow up visit: The mean spherical equivalent value: -0.08±0.40, the mean Log MARUCVA: 0.02±0.07, the mean Log MAR BCVA: 0.00±0.04. Conclusion: PRK is an effective, safe and predictable method used to correct myopia. The wave frontoptimized algorithm of the Allegretto Wave Eye-Q 400-Hz excimer laser platform demonstrated good refractive and visual results. Presence of variables such as gender, age and astigmatism before operation have no significant impact on the result of this operation. © 2016, Professional Medical Publications. All rights reserved

2-Amino-4-methyl­pyridinium 6-carb­oxy­pyridine-2-carboxyl­ate sesquihydrate

In the title compound, C6H9N2 +·C7H4NO4 −·1.5H2O, extensive O—H⋯O, O—H⋯N, N—H⋯O and C—H⋯O hydrogen bonds, as well as ion pairing, π–π stacking inter­actions [centroid–centroid distances = 3.4690 (8) and 3.6932 (8) Å between aromatic rings] occur in the crystal. There are hydrogen-bonding inter­actions between water mol­ecules, which result in cyclic tetra­meric water clusters. One of the water O molecules has half occupancy. In the anion molecules, the –CO2 and –CO2H groups make torsion angles of 1.73 (18) and −12.14 (18)° with respect to the ring

Energy analysis of wall materials using building information modeling (BIM) of public buildings in the tropical climate countries

During the previous two decades, the energy saving potential using systematic building management is considered to be important which should be considered through the building lifecycle. Among the wide range types of different buildings, Public buildings are considered as one of the biggest energy-consuming sector in the world and major part of this amount is used by the air conditioning system especially in tropical climates. The most effective decisions related to sustainable design of a building facility are made in the feasibility and early design stages. Building Information Modeling (BIM) can expedite this process and provide the opportunity of testing and assessing different design alternatives and materials selection that may impact on energy performance of buildings. This paper aims at evaluating the efficiency of various types of wall materials with regard to theirs properties on energy saving. The case study in this paper is modeled by means of BIM application and then simulated by software, which is appropriate for energy analysis. The current energy consumption patterns of this case identified and shifted to the optimized level of energy usages by changing the walls materials to find most optimized of walls materials. Modification most optimized wall materials and energy analysis indicated 9347 Wh in Per meter square of electrical energy saving

Measuring psychosocial exposures: Validation of the Persian of the copenhagen psychosocial questionnaire (COPSOQ)

Background: The effect of psychosocial work environment on personal and organizational aspects of employees is well-known; and it is of fundamental importance to have valid tools to evaluate them. This study aims to evaluate the reliability and validity of the Persian version of Copenhagen Psychosocial Questionnaire (COPSOQ). Methods: The questionnaire was translated into Persian and then back translated into English by two translators separately. The wording of the final Persian version was established by comparing the translated versions with the original questionnaire. One hundred three health care workers completed the questionnaire. Chronbach's alpha was calculated, and factor analysis was performed. Results: Factor analysis revealed acceptable validity for the five contexts of the questionnaire. Cronbach's alpha ranged from 0.73 to 0.82 in different contexts. Conclusion: This study revealed that the Persian version of COPSOQ is a reliable and valid instrument for measuring psychosocial factors at work

Cluster approximation solution of a two species annihilation model

A two species reaction-diffusion model, in which particles diffuse on a one-dimensional lattice and annihilate when meeting each other, has been investigated. Mean field equations for general choice of reaction rates have been solved exactly. Cluster mean field approximation of the model is also studied. It is shown that, the general form of large time behavior of one- and two-point functions of the number operators, are determined by the diffusion rates of the two type of species, and is independent of annihilation rates.Comment: 9 pages, 7 figure

Heteropolyacides as green and reusable catalysts for the synthesis of [3,4-b][1,3,4] thiadiazines

Synthesis of [3,4-b][1,3,4]thiadiazines from the condensation of 4-amino-6-methyl-3-thioxo-1,2,4-triazine-5(2H)-one (AMTTO) or 4-amino-1,4-dihydro-5-methyle-1,2,4-triazole-5-thione (AMTT) with phenacyl bromide in the presence of a catalytic amount of various heteropolyacids (HPAs) under refluxing conditions is reported. DOI: http://dx.doi.org/10.4314/bcse.v28i1.