submitted by sahamplontotean 3 hours ago
Chemical investigations of the soft coral Sarcophyton trocheliophorum, has led to the isolation of six cembranoids, two of which are new, Trochelioid A (1) and B , and one, 16-oxosarcophytonin E isolated from nature for the first time. Additionally, two have been isolated from S. trocheliophorum ...
submitted by sommei 3 hours ago
Tetrahydroxystilbene glucoside (TSG) is a strong antioxidant and free radical scavenger derived from Polygonum multiflorum Thunb. The present study aims to evaluate the protective effect of TSG against d-galactose induced aging process in mice and its possible mechanisms of action. Our study reve...
submitted by samonothco 3 hours ago
Four novel 2-styrylchromones, 4′,5,7-trihydroxy-6-isopentene-2-styrylchromone (1), 4′,5,7-trihydroxy-8-isopentene-2-styrylchromone , 4′,5,7-trihydroxy-6-(2-hydroxy-3-methylbut-3-enyl)-2-styrylchromone and 4′,5,7-trihydroxy-8-(2-hydroxy-3-methylbut-3-enyl)-2-styrylchromone , were isolated ...
submitted by ohjarth 3 hours ago
The authors observe that the external quantum efficiency (EQE) of the Iridium (III) bis(4-phenylthieno [3,2-c]pyridinato-N,C2′)acetylacetonate (PO-01) based yellow organic light-emitting diode (OLED) is significantly increased by uniformly co-doping Iridium (III)bis[(4,6-difluorophenyl)-pyridin...
submitted by ortwretis 3 hours ago
The paper presents the results of a study on the luminescence of SrI2:Nd3+ single crystals grown by the vertical Bridgman method. The photoluminescence (PL) spectra of SrI2:Nd crystals show characteristic lines corresponding to transitions in trivalent Nd3+ ions, the most intense line at ca. 1070...
submitted by socializr 3 hours ago
An analysis of the effects of rapid thermal annealing on the photoluminescence spectrum of InAs/In0.15Ga0.85As/GaAs Quantum dot-in-a-well heterostructures is presented. The variation of ground state interband transition energies with annealing has been modeled and the effect of varying dot aspect...
submitted by trthelokkamor 3 hours ago
Pure and Pb2+ doped LiSr4(BO3)3 materials were prepared by a solution combustion synthesis method. The phase analysis of all synthesized materials were determined using the powder XRD. The synthesized materials were investigated using spectrofluorometer at room temperature. The excitation and emi...
submitted by pietaamp 3 hours ago
The linear and nonlinear optical absorption as well as the linear and nonlinear corrections to the refractive index are calculated in a disc shaped quantum dot under the effect of an external magnetic field and parabolic and inverse square confining potentials. The exact solutions for the two-dim...
submitted by harndag 3 hours ago
Sol–gel chemistry within the pores of a polycarbonate template membrane was used for the preparation of Eosin Y–SiO2 hybrid nano- and microrods, using tetraethylorthosilicate [TEOS, Si(OC2H5)4] as the precursor in the presence of trifluoroacetic acid (TFA) catalyst. The ethanolic solution of ...
submitted by felixsch4 3 hours ago
In this present study, the combined effects of intense laser field and applied electric field on the nonlinear optical absorption and refractive index change in Ga 1 − x In x N y As 1 − y / GaAs double quantum wells are theoretically investigated within the framework...
submitted by drrlawry 3 hours ago
The phase relationship in the Al-Mo-Dy ternary system at 873 K has been investigated mainly by means of x-ray powder diffraction and scanning electron microscopy. The existences of ten binary compounds (i.e. AlMo3, Al8Mo3, Al4Mo, Al5Mo, Al12Mo, AlDy2, Al2Dy3, AlDy, Al2Dy and Al3Dy) and one terna...
submitted by Geohamdy 3 hours ago
Aqueous extracts of thistle flowers from the genus Cynara—Cardueae tribe Cass. (Cynareae Less.), Asteraceae Dumortier—are traditionally used in the Mediterranean region for production of artisanal cheeses. This is because of the presence of aspartic proteases (APs) with the ability to coagula...
submitted by dena 4 hours ago
In this paper layer-by-layer (LBL) assembly of calf thymus DNA (ct-DNA) onto gold-mercaptopropionic acid self-assembled monolayer via Zr(IV) ion glue, Au-MPA-Zr(IV)-ct-DNA SAM, is monitored by scanning tunneling microscopy (STM) technique. The STM images of Au-MPA-Zr(IV) template show well-organi...
submitted by skarc 5 hours ago
Phthalimide derivatives as nitrogen nucleophiles with α,β-unsaturated aldehydes for asymmetric aza-Michael additions have been reported. The reactions proceed smoothly to afford corresponding Michael adducts in good yields (up to 98%) and enantioselectivities (up to 95% ee).Phthalimide derivati...
submitted by EliaLanden 5 hours ago
Polymer solar cells were fabricated based on composite films of poly(2-methoxy-5-(2′-ethyl-hexyloxy)-1,4-phenylenevinylene) (MEH-PPV):fullerene derivative (6,6)-phenyl-C61-butyric acid methyl ester (PCBM) with weight blend ratio of 1:3, 1:4 and 1:5, spin-coated from chloroform (CF), chlorobenze...