Guest Editorial: Special Issue on Performance Evaluation in Computer Vision

International Journal of Computer Vision -     

Suicidal age and childhood onychophagia among psychotic veterans

The relationship between childhood onychophagia (fingernail biting) and the suicidal and nonsuicidal mean age among 150 hospitalized psychotic veterans was investigated. The results show that the suicidal mean age is significantly younger than the nonsuicidal mean age and that the childhood onychophagia variable "focal suicide" significantly lowers the mean age of suicidal veterans, but does not significantly lower the mean age of nonsuicidal veterans.     

Surface properties and catalytic behavior of MoO3/SiO2 in esterification of acetic acid with ethanol

A series of MoO₃/SiO₂ catalysts was prepared by an impregnation method with Mo loadings ranging from 1 to 50 wt%. The original and calcined samples at 400 °C were characterized by thermogravimetry (TG), differential thermogravimetry (DTG), differential scanning calorimetry (DSC), X‐ray diffraction (XRD), Fourier transform infra‐red (FTIR) spectroscopy, and nitrogen adsorption measurements. The surface acidity and basicity of the catalysts were investigated by the dehydration–dehydrogenation of isopropanol and the chemisorption of pyridine. The catalytic esterification of acetic acid with ethanol was carried out at 220 °C in a conventional fixed‐bed reactor at 1 atm using air as a carrier gas. The results clearly revealed that silica–molybdena catalysts were active and selective towards the formation of ethyl acetate. Moreover, the catalyst containing 20 wt% MoO₃ was the most active and selective one. The results emphasize the importance of the surface acid sites together with the specific surface area of the prepared catalyst, towards ester formation. Copyright © 2005 Society of Chemical Industry     

Cyclisierungen mit Cyanthioacetamid in Gegenwart von Schwefel

Cyclizations of Cyanothioacetamide in the Presence of Sulphur Cyanothioacetoamide 1 reacts with sulphur in the presence of triethylamine to form the 2,5-diamino-thiophene derivative 3 and in the presence of sodium ethoxide the 1,4-dihydropyridine derivative 2 , respectively. 3 easily undergoes ring opening to yield the butadiene derivative 6 . Catalyzed by amine from 1 , cyclic ketones, and sulphur the 2-spiro[thieno[2,3-d]pyrimidine-4-thiones] 8 arise. Analogously to other cyanoacetic acid derivatives 1 react with sulphur and isothiocyanates to form the 4-amino-Δ⁴-thiazoline-2-thiones 9 and with sulphur and carbon disulfide to yield the 5-amino-1,2-dithiol-3-thione derivative 12 . Among the o-amino-thiocarboxamides 3 , 9 , 12 the compounds 3 and 9 can be converted into the 5,6-heterocondensed pyrimidine-4-thiones 4 and 10 .     

Biophotonic sensors with integrated Si3N4-organic hybrid (SiNOH) lasers for point-of-care diagnostics

Early and efficient disease diagnosis with low-cost point-of-care devices is gaining importance for personalized medicine and public health protection. Within t...     

MO-Berechnungen zur photographischen Farbentwicklung. IX. Experimentelle und quantenchemische Untersuchungen zur Acidität von Pyrazolonen-(5)

MO Calculations on the Photographic Development. IX. Experimental and Quantum Chemical Investigations on the Acidity of 5-Pyrazolones The pK_s values of 49 derivatives of 5-pyrazolone are measured by potentiometric titration and their ¹H-NMR-spectra recorded in DMSO-d₆. The experimental acidity order correlates for structural similar compounds as well with substituent constants and HMO electron densities.     

Revealing the Chemical Composition of Birch Pollen Grains by Raman Spectroscopic Imaging

The investigation of the biochemical composition of pollen grains is of the utmost interest for several environmental aspects, such as their allergenic potential and their changes in growth conditions due to climatic factors. In order to fully understand the composition of pollen grains, not only is an in-depth analysis of their molecular components necessary but also spatial information of, e.g., the thickness of the outer shell, should be recorded. However, there is a lack of studies using molecular imaging methods for a spatially resolved biochemical composition on a single-grain level. In this study, Raman spectroscopy was implemented as an analytical tool to investigate birch pollen by imaging single pollen grains and analyzing their spectral profiles. The imaging modality allowed us to reveal the layered structure of pollen grains based on the biochemical information of the recorded Raman spectra. Seven different birch pollen species collected at two different locations in Germany were investigated and compared. Using chemometric algorithms such as hierarchical cluster analysis and multiple-curve resolution, several components of the grain wall, such as sporopollenin, as well as the inner core presenting high starch concentrations, were identified and quantified. Differences in the concentrations of, e.g., sporopollenin, lipids and proteins in the pollen species at the two different collection sites were found, and are discussed in connection with germination and other growth processes.     

拉伸变形在线温度监测的研究

本项目旨在改进拉伸变形的生产控制,以求改进DTY（拉伸变形丝）的质量,减少损耗和昂贵的废料物。在生产中采用对运行长丝在线温度监测的方法应该可以提前发现变形丝染色性的差异。