Operating on 10 GHz requires the ability to point the antenna with reasonable accuracy as the antenna beamwidth is quite narrow. My 2 foot dish as an example has ~ 34 dBi of gain and a 3 dB beamwidth of 3 degrees - put another way, 1.5 degrees either side of peak! All antenna heading...
Fig. 2(f) shows the IR spectra of SPEEK-PDA-VEGF tested. The peak at 3530 cm−1 is due to the stretching vibration of the phenolic hydroxyl group contained in the dopamine, which can prove that the dopamine was successfully encapsulated on the surface of the SPEEK sample. The peaks at...
I fear it is busier peak season but we were able to wander the streets unhindered by coach parties and paused to soak up the ambience eating frites and mayo – as you do. Better pic Onwards we went leaving behind the queues of people wailing and gnashing their teeth at the parking meters...
( abOu) 395 K and a eXO,hermic peak cOrrespOngding (O )he se,f-crOss,inking reac,iOn Of f(uOrina)ed pO,y(e(her e)her ke(OngD a)abOu, 700 K. FOr ,he secOnd hea(ing run) (he eXO)hermic peak disappered and (he g)ass (ransi)iOn shif(ed )O a higher (empera)ure. ...
The β relaxation peak and the α′ relaxation peak were observed in the logarithmic decrement curve of the amorphous block copolymer of PEEK/PES. The glass transition temperature (β relaxation peak) is shifted to higher temperature and approaches a constant value as annealing time and degree of...
A triplet signal that is assigned to the proton Hc of precursor 6 disappears completely in the spectrum of macrocycle 10. In addition, a doublet signal that is assigned to the proton Hd of precursor 9 also disappears completely in the spectrum of 10. The peak positions of the singlet ...
1H chemical shifts were expressed in δ units (ppm) with respect to the residual peak of the solvent (1H: CDCl3 7.26 ppm). Fourier-transform infrared spectroscopy (FTIR) measurements were performed on a FT-IR Bruker Vertex 70 Spectrophotometer. The samples were in form of free-standing film...
The crystalline characteristic IR peaks of PBT were investigated as a function of the annealing time. It was also found that C O stretching peak of PEI/PBT blend shifted to lower wavenumber as the crystallization of PBT in PEI/PBT blends proceeded. The trend of C O peak shift in PEI/PBT...
In the presence of 18-crown-6, D2O forms a 1:1 complex with the macrocyclic molecule in supercritical fluid CO2 with two different configurations. The D2O molecule can be bonded to two oxygen atoms of the crown cavity in a bridged configuration that is characterized by a broad peak at 2590...
A continuous shift towards lower ppm values is observed in the chemical shift of 7Li and 11B NMR spectra with addition of Li salt until it reaches the saturation point at 1.0 mol kg−1 concentration. Generally, the line width NMR peak increases with increasing Li salt concentrations ...