Multimetallic cooperativity is believed to play a key role in the cleavage of dinitrogen nitrides (N3-), but mechanism remains ambiguous due lack isolated intermediates. Herein, we report reduction complex [K2{[UV(OSi(OtBu)3)3]2(?-O)(?-?2:?2-N2)}], B, with KC8, yielding tetranuclear tetranitride cluster [K6{(OSi(OtBu)3)2UIV}3{(OSi(OtBu)3)2UVI}(?4-N)3(?3-N)(?3-O)2], 1, novel example N2 nitride b...

Background: The increasing evidences show that global depletion of stratospheric ozone layer is caused by pollutant and growing incidence of the skin cancer and cataract is related to the amounts of solar UV radiation reaching the earth ׳s surface. Therefore, the main driving force behind such efforts has been the lack of an appropriate network in scope monitoring of the terrestrial UV...

Crystals of two new inorganic uranyl silicates, Cs[(UO6)2(UO2)9(Si2O7)F] (1) and Rb2[(PtO4)(UO2)5(Si2O7)] (2), were produced from melts in evacuated silica tubes. Their structures have been solved by direct methods: 1 is trigonal, P-31c, a = 10.2040(3), c 17.1278(5) Å, V 1544.45(10) Å3, R1 0.042; 2 tetragonal, P4/mbm, 16.0400(24), 3.9231(6) 1009.34(10) 0.045. the first example cation–cation int...

The luminous tongues tend to be narrower and having We present ground-based electromagnetic data from the may occasionally develop into auroral torches which are MIRACLE and BEAR networks and satellite optical narrow, finger-like auroral forms that extend several observations from the UVI and PIXIE instruments on the degrees of latitude poleward from the auroral oval. Inside Polar satellite of ...

In the present research, continuous measurements of global solar radiation (G) and UVB are taken in different climate sites during period time from 1986 to 2020 for all weather conditions. The differences between measured calculated energy values vary 1% 2.2%. average hourly intensity ratio current study's total was 0.294%. contrast, UVBext. corresponding Gext., UVBext./Gext., 1.563%, demonstra...

In this paper, experimental results on the residual mechanical stress generated during the different steps of the photolithography process of SU-8 thin films using different photo-initiator concentrations are presented. The main aim of the reported research work has been firstly to investigate and identify the causes for the generation of residual stresses and secondly to optimise the fabricati...

[1] This paper reports results from a detailed analysis of theta auroras that occurred during the passage of a magnetic cloud on 8 November 2000. The interplanetary magnetic field (IMF) was generally northward for more than 12 hours, while the y-component of the IMF changed signs several times. Auroral images of the Northern Hemisphere acquired from the Ultraviolet Imager (UVI) on board the Pol...

BACKGROUND The role played by vitamin D in atopic dermatitis is controversial and has been the focus of many studies. The ultraviolet index has not been considered in this type of research. OBJECTIVES The objectives of the study were to assess 25-hydroxy vitamin D [25(OH)D] serum level in atopic dermatitis patients and control group, to investigate the association between atopic dermatitis cl...

The area of the polar cap a.s a function of local time and substorm phase was measured using images from the Polar Ultraviolet Imager (UVI) for different interplanetary magnetic field (IMF) orientations during three substorms in January 1997. We measured changes in the polar cap area and motion of the poleward and equatorward boundary of the auroral oval. It was found that the polar cap boundar...