Enhanced transmission through squeezed modes in a self-cladding magnonic waveguide.

We study spin-wave propagation in 360-nm wide Ni(80)Fe(20) nanowires using all-electrical spin-wave spectroscopy. Creating a zigzag-like magnetization state, we find enhanced spin-wave transmission compared to the states of more homogeneous magnetization. Micromagnetic simulations show that the spin waves propagate in narrow channels, which in particular, are remotely positioned from the edges. The internal channels reflect field-controlled self-cladding. Interestingly, rotation of the magnetic field at a specific value is found to vary the propagation velocity without changing the eigenfrequency. This opens the perspective of the velocity modulation transistor following a concept known from semiconductor electronics.

Effect of oregano (O. majorana x O. vulgare) on performance and antioxidative capacity of quails fed a diet rich in omega3 fatty acids.

Oregano possesses high antioxidant activity and could therefore be used to enhance oxidative stability of eggs high in omega3 fatty acids. In this study, 20 female quails were fed a diet containing 4% linseed oil. They were divided into two groups, one receiving oregano, and the other grass meal as control (2% respectively). Cholesterol oxidation products were analysed in fresh eggs, in stored eggs and in the livers. Trolox equivalent antioxidative capacity of plasma was measured. No significant differences were seen between the groups.

Morphometric and ultrastructural findings on human vestibular ganglion cells.

Eight human temporal bones (4 patients) were fixed within 2 h after death by perilymphatic perfusion through the oval and round windows. After preparation, 30-micron-thick sections were cut for light microscopy and ultrathin sections for ultrastructural evaluation. Under the light microscope, the diameter, the circumference and the area of the vestibular ganglion cells were measured. The data were statistically analyzed. The histograms of cell measurements showed two maxima. When observing the diameter of cells, one was at 40 microns and the other at 28 microns. Under the light microscope, we could distinguish two cell types, which mainly differed in size and content of granules in the cytoplasm. Ultrastructurally we identified also two cell types: larger cells with many mitochondria, dark clusters of endoplasmic reticulum and a varying amount of dark-stained lysosomes in the cytoplasm and smaller cells with only few mitochondria, no lysosomes and an extended rough endoplasmic reticulum. None of the ultrastructurally analyzed ganglion cells were myelinated.

Angioneurotic edema as a reaction to angiotensin-converting enzyme inhibitors.

While the incidence of ACEI-induced angioedema is low, ACEI use will continue to increase its frequency. Emergency physicians and otolaryngologists should play a key role in identifying patients with angioedema associated with ACEIs. Every patient with acute angioedema, especially in the region of the mouth, the tongue, and the upper airways, must be asked for medication with ACEIs. The physician must be aware of the fact that a moderate swelling can rapidly develop to a massive swelling, which requires an intubation or even a coniotomy. Thus, in any of these cases, the patient should be observed at least for 24 hours in the clinic or until the edema subsided almost completely.

A quantitative study of nerve fibers in the human facial nerve.

The facial and intermediate nerves were quantitatively evaluated in seven patients who died from systemic malignancies not involving the facial nerve. In addition, five of the specimens were also qualitatively evaluated by measuring the total and axon diameters of the facial and intermediate nerve fibers. In two cases the facial nerve fibers were counted at five different levels. The total number of myelinated nerve fibers in the facial nerve varied from 7500 to 9370. The total number of myelinated nerve fibers in the intermediate nerve varied between 3120 and 5360. The peak diameter of the facial nerve axon was between 4 and 6 microns, and was between 2 and 3 microns in the intermediate nerve. When comparing nerve segments at different anatomical levels, the largest amount of nerve fibers was found at the level of the middle mastoid portion. However, this number did not reach the amount of nerve fibers counted in the internal acoustic meatus.

[Numerical taxonomic studies on enterobacteria of surface-water (author's transl)]. / Numerisch taxonomische Untersuchungen an Enterobakterien aus Oberflächenwasser.

435 enterobacterial strains of surface-water were tested in 35 physiological characters and classified numerically by a single-linkage procedure. The relations of similarity are shown in a "Vernetzungsdiagramm" (connected graph, Fig. 1). Tab. 1 specifies the characters of the taxa, which were formed graphically. The following facts are the result of this taxonomic classification: 1. 32% of the Escherichia group are KCN-positive. In addition it was found that 60% of the E. coli isolated from the faeces of wild ducks were KCN-positive. 2. The type strains of the species Enterobacter aerogenes and Klebsiella aerogenes show a far reaching conformity in their physiological character. The splitting into two genera does not seem to be of significance any longer. 3. By reason of the "Vernetzungsdiagramm" and the table of characters (Tab. 1) we propose to regroup the genera Enterobacter and Erwinia. The genus Erwinia represented here by bacteria of the Herbicola-Lathyri-group is clearly divided into two groups. In the discussion we propose for Erwinia I the name of Enterobacter agglomerans and for Erwinia II the name of Enterobacter herbicola. 4. The taxa Kluyvera and Levinea are placed in the vicinity of Enterobacter cloacae and Erwinia II (Enterobacter herbicola), respectively.