PT Symmetric, Hermitian and P-Self-Adjoint Operators Related to Potentials in PT Quantum Mechanics

In the recent years a generalization $H=p^2 +x^2(ix)^\epsilon$ of the harmonic oscillator using a complex deformation was investigated, where \epsilon\ is a real parameter. Here, we will consider the most simple case: \epsilon even and x real. We will give a complete characterization of three different classes of operators associated with the differential expression H: The class of all self-adjoint (Hermitian) operators, the class of all PT symmetric operators and the class of all P-self-adjoint operators. Surprisingly, some of the PT symmetric operators associated to this expression have no resolvent set

Determine compost quality using the cress tests (OK-Net Arable Practice Abstract)

Cress tests are a simple tool to test the phytotoxicity of composts. They are easy to carry out and analyse, and they only require few materials

Evaluation of Aposphaeria amaranthi as a Bioherbicide for Pigweed (Amaranthus Spp.)

Studies were conducted to determine the potential of the fungus, Aposphaeria amaranth!, as a bioherbicide for pigweeds (Amaranthus spp.). Experiments to establish the environmental parameters necessary for control of tumble pigweed (A. albus) demonstrated that an 8-hr dew period was sufficient for control of seedlings with four to six leaves, and that temperatures ranging from 20 to 28 C were conducive for disease development. Conidial concentrations as lowas 1x 10s conidia per ml also were sufficient for plant mortality. Host range tests demonstrated pathogenicity of A. amaranthi to several other species of Amaranthus, including biotypes resistant to triazine herbicides. Disease on redroot pigweed (A. retroflexus) was enhanced by incorporation of surfactants into inoculum suspensions. Field tests conducted in 1990 resulted in 73% control of redroot pigweed and 99% control of tumble pigweed. These results suggest that Aposphaeria amaranthi has potential as a bioherbicide for controlling pigweeds

Photometric and spectroscopic variations of the Be star HD 112999

Be objects are stars of B spectral type showing lines of the Balmer series in emission. The presence of these lines is attributed to the existence of an extended envelope, disk type, around them. Some stars are observed in both the Be and normal B-type spectroscopic states and they are known as transient Be stars. In this paper we show the analysis carried out on a new possible transient Be star, labelled HD 112999, using spectroscopic optical observations and photometric data.Comment: 10 pages, 5 figures, accepted for publication in IBV

Targeted Chemotherapy with Metal Complexes

Classical chemotherapeutics, such as cisplatin and its analogues, have been highly successful in the clinic, yet improvements can certainly be made, given the significant side effects associated with the killing of healthy cells. Recent advances in the field of chemotherapy include the development of targeted anticancer agents, compounds that are directed towards a specific biomarker of cancer, with the hopes that such targeted therapies might have reduced side effects given their greater selectivity. Here we discuss several transition metal complexes that are tailored towards various biomolecules associated with cancer. Most notably, the success of rhodium metalloinsertors, which specifically bind to nucleic acid base mismatches in DNA, highlight the enormous potential of this exciting new strategy

Relative Oscillation Theory, Weighted Zeros of the Wronskian, and the Spectral Shift Function

We develop an analog of classical oscillation theory for Sturm-Liouville operators which, rather than measuring the spectrum of one single operator, measures the difference between the spectra of two different operators. This is done by replacing zeros of solutions of one operator by weighted zeros of Wronskians of solutions of two different operators. In particular, we show that a Sturm-type comparison theorem still holds in this situation and demonstrate how this can be used to investigate the finiteness of eigenvalues in essential spectral gaps. Furthermore, the connection with Krein's spectral shift function is established.Comment: 26 page

Slow crack propagation in glass

Slow crack propagation in glass is examined in a variety of environments using the double-torsion technique. The results are interpreted in terms of a limited plasticity fracture criterion and the time dependence of the yield stress

Testing peas for legume fatigue (OK-Net Arable Practice Abstract)

The method offers reference points regarding the soil's contamination with these pathogens, and thus indication for a possibly required cultivation break. Refraining from cultivating on contaminated soils helps avoid the situation of a high yield loss due to legume fatigue. Practical recommendation 1. Extract 10 litres of humid soil from the field plot you wish to examine and sieve it down to a grain size of 10 mm. 2. Moisten dry samples and mix them up evenly. 3. Fill four aluminium trays with the humid soil and store the remaining soil. 4. Cover the trays filled with soil with tinfoil and place them in the baking oven. Sterilise the samples for at least 12 hours at 70-100 °C in the oven. 5. Let the aluminium trays cool for 12 hours after sterilisation. 6. Mark four flowerpots with "R" (for untreated reference) and another four with "H" (for heat-treated soil). 7. Fill the four H-flowerpots with the heat-treated soil and fill the four R-flowerpots with the untreated soil. 8. Place 5 field-pea seeds in each pot and cover them with 0, 5 cm of soil. 9. Place the pots in a tray with some water and keep them in a sheltered place with at least 18 °C and daylight. 10. Keep the pots humid during about 6 weeks by pouring water into the trays

Flammenphotometrische Bestimmung der freien Sulfationen im Harn

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