The Quality of Life of Families of Children with Cerebral Palsy

Cerebral palsy, the most common cause of physical childhood disability, is a non-progressive disorder that results from an anoxic brain injury to the fetal or newborn brain. Because this disorder can cause disability, ranging from mild to severe effects on motor and cognitive functioning, the diagnosis can vary from one child to another, causing family stress due to vague and unknown predicted outcomes of the disorder. Because the diagnosis of cerebral palsy affects families in different ways depending on coping mechanisms, support systems, and the age and level of functioning of the child, among other factors, it is important to take an individualistic approach to care. Family-centered care has been shown to be beneficial in approaching the care needs of these families. To promote overall quality of life, efforts should be made to evaluate specific family member needs and include the entire family in the education, care planning, and implementation processes

Atomically resolved scanning force studies of vicinal Si(111)

Well-ordered stepped semiconductor surfaces attract intense attention owing to the regular arrangements of their atomic steps that makes them perfect templates for the growth of one- dimensional systems, e.g. nanowires. Here, we report on the atomic structure of the vicinal Si(111) surface with 10 degree miscut investigated by a joint frequency-modulation scanning force microscopy (FM-SFM) and ab initio approach. This popular stepped surface contains 7 x 7-reconstructed terraces oriented along the Si(111) direction, separated by a stepped region. Recently, the atomic structure of this triple step based on scanning tunneling microscopy (STM) images has been subject of debate. Unlike STM, SFM atomic resolution capability arises from chemical bonding of the tip apex with the surface atoms. Thus, for surfaces with a corrugated density of states such as semiconductors, SFM provides complementary information to STM and partially removes the dependency of the topography on the electronic structure. Our FM-SFM images with unprecedented spatial resolution on steps confirm the model based on a (7 7 10) orientation of the surface and reveal structural details of this surface. Two different FM-SFM contrasts together with density functional theory calculations explain the presence of defects, buckling and filling asymmetries on the surface. Our results evidence the important role of charge transfers between adatoms, restatoms, and dimers in the stabilisation of the structure of the vicinal surface

DNA methylation in CHO cells - Characterization of epigenetic phenomena under process conditions

Wippermann A. DNA methylation in CHO cells - Characterization of epigenetic phenomena under process conditions. Bielefeld: Universität Bielefeld; 2017

Grinding of transformation-toughened mixed oxide ceramic

During the manufacturing of ceramic components, grinding is an important manufacturing step. It influences the workpiece quality and the operational reliability. Thermomechanical loads during grinding can influence the lifetime and operational reliability of ceramics by modifying their bending strength and subsurface properties. Therefore, it is necessary to consider the influence of the grinding forces and mechanical loads on the strength of the ceramics in order to design a suitable grinding process. In this investigation, a quick-stop device is used to interrupt the grinding process of the newly developed mixed oxide ceramic SHYTZ (strontium hexaaluminate/yttria-toughened zirconia) and the market-established ceramic ATZ (alumina-toughened zirconia). Subsequently, an analysis of the occurring material removal phenomena, the number of active abrasive grains, and the real thermomechanical loads is carried out. It was found that the number of active grains and the material removal phenomena are influenced by the tool specifications. Besides that, the experimentally determined number of active grains was found to be up to 14 times higher than predicted by an analytical model given in literature. Consequently, the calculated single grain chip thickness was found to be up to 12.1% lower than analytically predicted. The investigation of the process forces and thermal loads showed up to 52% higher loads for ATZ than for SHYTZ. The subsequent analysis of the resulting bending strength of the ceramics revealed a lower influence of the grinding process on the strength of SHYTZ than for ATZ. Furthermore, a correlation between the used tool bonding and the resulting thermomechanical loads, bending strength, and residual stresses could be observed. © 2020, The Author(s)

Diaplazentare Deoxynivalenolintoxikation bei Schweinefeten. Lassen sich am 70. Trächtigkeitstag histomorphologisch und immunhistologisch diagnostisch verwertbare Befunde erheben?

Diaplacentar deoxynivalenol intoxication in porcine fetuses. Are histomorphological and immunohistochemical investigations at the 70th day of gestation a helpful diagnostic tool