A procedure was selected for the simultaneous extraction and purification of abscisic acid (ABA) and indoleacetic acid (IAA). Unnecessary steps were eliminated and an accumulation of aqueous phase was avoided. The superior performance of diethyl ether (compared to ethyl acetate) for bulk purification and the superior resolution provided by 250 millimeter columns packed with 5-micrometer spheric...

Terahertz digital off-axis holography is demonstrated using a Mach-Zehnder interferometer with a highly coherent, frequency tunable, continuous wave terahertz source emitting around 0.7 THz and a single, spatially-scanned Schottky diode detector. The reconstruction of amplitude and phase objects is performed digitally using the angular spectrum method in conjunction with Fourier space filtering...

We describe the control and performance of a new near-infrared camera based on a Rockwell PICNIC array detector for interferometry observations at the Infrared-Optical Telescope Array (IOTA). The camera control uses a complex programmable logic device that allows fast and stable clocking of the PICNIC array and on-the-fly reconfiguration of the readout method. We measured a read noise as low as...

We propose to utilize confocal Raman spectroscopy combined with high resolution atomic force microscopy (AFM) for nondestructive characterisation of the sidewalls of etched and passivated small pixel (24μm×24μm) focal plane arrays (FPA) fabricated using LW/LWIR InAs/GaSb type-II strained layer superlattice (T2SL) detector material. Special high aspect ratio Si and GaAs AFM probes, with tip leng...

Abstract This paper summarizes the research status of nondestructive testing technology building structures, focuses on technical principles and characteristics first wave phase inversion method impact elastic method, this basis, detector based reversal were used to conduct experimental cracks, materials, defects thickness test block. The results show that has low requirements for environment, ...

introduction: radiation imaging is one of the applicable methods in diagnostic medicine and nondestructive testing for industrial applications. in nondestructive 3d imaging, in addition to the radiation source, there is a requirement for a suitable detection system, data acquisition system, mechanical sections for moving objects, reconstruction algorithm and finally a computer for processing an...

The visual automatic detection method based on artificial intelligence has attracted more and attention. In order to improve the performance of weld nondestructive defect detection, we propose DRepDet (Dilated RepPoints Detector). First, analyze dataset in detail summarize distribution characteristics data, that is, scale is very different aspect ratio range large. Second, according design DRes...

X-ray microtomography is a nondestructive, three-dimensional inspection technique applied across vast range of fields and disciplines, ranging from research to industrial, encompassing engineering, biology, medical research. Phase-contrast imaging extends the domain application x-ray classes samples that exhibit weak attenuation, thus appearing with poor contrast in standard imaging. Notable ex...

Images were acquired using micro tomography technique (μCT ). That technique allows to study nondestructive internal structures imaging of any object. X-ray tube generates x-ray electromagnetic radiation which penetrates through the studied sample. Attenuation of x-rays intensity is registered at the opposite side of the sample by two-dimensional detector. Value of x-ray intensity registered in...

Nondestructive assay of gamma-ray emitting nuclear waste requires modeling because it is not practical to prepare a standard that matches the physical and nuclear properties of every waste item. The use of a high-purity germanium (HPGe) detector simplifies the spectral analysis process. Many models use simplified efficiency determinations and attenuation corrections. These models often work wel...