Engineering bistetrazoles: (<i>E</i>)-5,5′-(ethene-1,2-diyl)bis(1<i>H</i>-tetrazol-1-ol) as a new planar high-energy-density material

Crystal structure of the high-energy-density material guanylurea dipicryl­amide

The title compound, 1-carbamoylguanidinium bis-(2,4,6-tri-nitro-phen-yl)amide [H2NC(=O)NHC(NH2)2](+)[N{C6H2(NO2)3-2,4,6}2](-) (= guanylurea dipicryl-amide), was prepared as dark-red block-like crystals in 70% yield by salt-metathesis reaction between guanylurea sulfate and sodium dipicryl-amide. In the solid state, the new compound builds up an array of mutually linked guanylurea cations and di...

Testing of a New High-density Concrete as Neutron Shielding Material

High -density lipoprotein cholesterol as a predictor for diabetes mellitus

Background: Diabetes is a prevalent chronic disease around the world. To evaluate risk of diabetes comprehensively, we developed a score model for the risk prediction with HDL-C as a protective factor. Methods: We extracted physical examination data of 2728 individuals. The data contain 18 demographic and clinical variables. To identify the statistical significant feature variables, the backwa...

Activated carbons derived from coconut shells as high energy density cathode material for Li-ion capacitors

In this manuscript, a dramatic increase in the energy density of ~ 69 Wh kg⁻¹ and an extraordinary cycleability ~ 2000 cycles of the Li-ion hybrid electrochemical capacitors (Li-HEC) is achieved by employing tailored activated carbon (AC) of ~ 60% mesoporosity derived from coconut shells (CS). The AC is obtained by both physical and chemical hydrothermal carbonization activation process, and co...

Iranian New Junior High School Book (Prospect 1) Weighted against Material Evaluation Checklist from Teachers' Perspective

The aim of this study was to evaluate the new version of Iranian EFL junior high school textbook (Prospect1) from the teachers’ perspectives. The participants included90experienced English teachers (42 females and 48 males) randomly selected from different junior high schools in different districts of Gilan province, Iran. The evaluation of the textbook was conducted quantitatively through a 5-...