Results of investigations on seminal fluid in so-called oligospermiogenesis

Diagnosis of ligospermiogenesis was made in 76 infertile subjects submitted to testicular biopsy. Histological examinations demonstrated a reduction in mature spermatids (Sc. Sd.-Clermont classification) in the tubular sections. Comparison of histological data with findings from seminal fluid analyses in these subjects revealed: a) a pathological seminal fluid pattern in all cases of oligospermiogenesis, b) these patients may show either an azoospermic or oligozoospermic seminal fluid pattern; statistical analyses confirmed an almost equal distribution of the two conditions.     

Die Wasserkraft als Rückgrat einer nachhaltigen Stromversorgung

Ohne Zusammenfassung Kurzfassung eines Vortrags der 43. Fachtagung der ?sterreichischen Gesellschaft für Energietechnik (OGE) im OVE, die am 24. und 25. November 2005 in Innsbruck stattfindet.     

Medical Image Registration and Interpolation by Optical Flow with Maximal Rigidity

In this paper a variational method for registering or mapping like points in medical images is proposed and analyzed. The proposed variational principle penalizes a departure from rigidity and thereby provides a natural generalization of strictly rigid registration techniques used widely in medical contexts. Difficulties with finite displacements are elucidated, and alternative infinitesimal displacements are developed for an optical flow formulation which also permits image interpolation. The variational penalty against non-rigid flows provides sufficient regularization for a well-posed minimization and yet does not rule out irregular registrations corresponding to an object excision. Image similarity is measured by penalizing the variation of intensity along optical flow trajectories. The approach proposed here is also independent of the order in which images are taken. For computations, a lumped finite element Eulerian discretization is used to solve for the optical flow. Also, a Lagrangian integration of the intensity along optical flow trajectories has the advantage of prohibiting diffusion among trajectories which would otherwise blur interpolated images. The subtle aspects of the methods developed are illustrated in terms of simple examples, and the approach is finally applied to the registration of magnetic resonance images.Supported by the Fonds zur Förderung der wissenschaftliche Forschung under SFB 03, Optimierung und Kontrolle.Stephen Keeling was born in 1956 in Louisville, KY, USA. He received the B.S. in Biology and Chemistry from Eastern Kentucky University in 1978, the M.S. in Biomedical Engineering (bioelectric phenomena) from Case Western Reserve University in 1981, and the Ph.D. in Mathematics (numerical analysis for PDEs) from the University of Tennessee in 1986. His postdoctoral research at ICASE and at Vanderbilt University focused on active noise control until 1989. From 1989 until 1998 he worked as Senior and then Principal Scientist in the CFD Group at the Arnold Engineering Development Center specializing in flow control and imaging. From 1998 until 2001 he worked with the mathematics and radiology faculties of the University of Graz as a Research Associate of the Special Research Center on Optimization and Control. Since 2001 he is Assistant Professor at the Institute of Mathematics of the University of Graz. His research interests include early vision problems in medical imaging with emphasis on MRI applications.Wolfgang Ring was born on November 6, 1965 in Zeltweg, Austria. He received his Masters Degree from the University of Graz in 1991 and his Ph.D. in Mathematics from the Technical University of Graz in 1994. He worked as an Assistant Professor at the Institute of Mathematics at the Technical University of Graz between 1993 and 1996. Since 1997 he is Assistant Professor at the Institute of Mathematics at the University of Graz. His main scientific interests are geometric inverse problems, mathematical imaging and optimal shape design.     

Variable-energy Blast Waves Generated by a Piston Moving in a Dusty Gas

This paper presents a similarity solution for strong blast waves of variable energy propagating in a dusty gas. It is assumed that the equilibrium-flow condition is maintained and the variable energy input is supplied by a driving piston or surface according to a time-dependent power law. Three cases have been investigated: Case I corresponds to a decelerated piston, Case II to a piston of constant velocity, and Case III to a continuously accelerated piston starting from rest. Except in the case of constant front velocity, the similarity solution is valid for adiabatic flow as long as the effect of the counter-pressure is neglected. The effects of a parameter characterizing the various energy input of the blast wave on the similarity solution have been examined. The computations have been performed for various values of mass concentration of the solid particles and for the ratio of density of solid particles to the constant initial density of gas. Tables and graphs of numerical results are presented and discussed.     

温芯盒用改性磷酸盐固化剂的研究和应用

针对呋喃树脂硬化过程和温芯盒制芯工艺的特点，开发了氯化化铝、氯化镁等改性的磷酸盐固化剂，研究其成分本比及分配比及用于温芯盒法时的工艺性能特点。     

Investigations on the oxalic acid content of honey from oxalic acid treated and untreated bee colonies

Varroa destructor, an ectoparasitic mite, is one of the major pests of honeybees in many parts of the world. In order to keep bee colonies alive and productive, effective biological, biotechnical, or acaricidal control measures are necessary. Oxalic acid is one substance under discussion to replace synthetic acaricides (e.g. pyrethroids, organophosphates) to minimize the risk of residues in bee products. The application of oxalic acid based solutions (Bienenwohl or a self-prepared oxalic acid solution with sugar) to control Varroa destructor resulted in no relevant changes in the oxalic acid content of honey produced the following year, compared with honey samples from untreated colonies from the same location. The range of oxalic acid content in honey was 5–68 mg/kg in oxalic acid treated and 5–65 mg/kg in untreated colonies. The oxalic acid content of the honey was positively correlated with its electrical conductivity and thus with its original nectar or honeydew source.     

Novel Data on the Polyphenol Composition of Italian Ancient Apple Cultivars

The pulp polyphenol composition of some Italian ancient apple cultivars, Dominici, Giachetta, Grigia di Torriana, Pom d'Aram, Ronzè, and Ros Borsetta, was studied in comparison with a Golden Delicious commercial variety, over a three-year period. Polyphenols were analyzed by liquid chromatography coupled with diode array and mass spectrometer detectors. The results showed that ancient varieties, such as Grigia di Torriana, Ros Borsetta, and Giachetta, constitute good sources of polyphenols, even without the peel. It was demonstrated that some representative apple phenolics, such as chlorogenic acid and phloridzin, were clearly affected by the harvesting year, whereas others, such as catechins and procyanidins, did not.     

棉织物生物酶前处理润湿性评价

研究了退浆、精练和漂白过程中影响棉织物润湿性的因素，指出渗透剂在棉织物前处理中会因其种类，浓度，处理温度，处理方式及干燥方式的不同，使织物有不同程度的“假毛效”。认为对于生物酶前处理，应以退浆率、果胶去除率，棉蜡去除率和润湿性等指标综合评价前处理效果。     

循环流化床锅炉的发展方向

介绍了循环流化床锅炉的历史由来及其发展,并针对其特点较详尽地阐述了循环流化床锅炉与其他炉型相比较所显示出来的优点,最后指出为实现循环流化床锅炉的进一步优化需解决的几个问题。