Publikationsdatenbank

Besides enzymatic conversions, many eukaryotic metabolic pathways also involve transport proteins that shuttle molecules between subcellular compartments, or into the extracellular space. Fungal itaconate production involves two such transport steps, involving an itaconate transport protein (Itp), and a mitochondrial tricarboxylate transporter (Mtt). [...]

Resonance modes in a planar square split-ring resonator (SRR) have been studied by Josephson spectroscopy at frequencies from 150 GHz to 800 GHz and excitation of fundamental modes in internal and external resonators have been observed. In addition, a square open-loop resonator (OLR) of the same dimension as the external resonator of the SRR has been analyzed, and red shift of the low-frequency resonance mode in SRR has been demonstrated..

Excitation of various resonance modes in a square open-loop resonator was studied by Josephson spectroscopy. A copper resonator with a side of a square of 233 μm was fabricated. [...]

[100]-tilt YBa 2 Cu 3 O 7-x bicrystal Josephson junctions with the resistances R n from 0.4 up to 400 Ohm have been fabricated and studied with Josephson admittance spectroscopy. In these junctions intrinsic ac shunting has been found, that is characterized by broadband admittance Y 1 of the order of R n -1 and low-level resonant contributions with the admittances ReY 2 (f k ) of two signs. [...]

[100]-tilt YBa 2 Cu 3 O 7-x bicrystal Josephson junctions (JJs) with resistances R n = (50-500) Ω and characteristic voltages I c R n (50 K) of 2.5 mV have been fabricated and their potential as classical terahertz detectors has been evaluated. The dc I-V curves of the JJs at temperatures T above 40 K have been found free of hysteresis and demonstrated high nonlinearity with the second derivatives d 2 V/dI 2 up to 10 7 -10 8 Ω/A at T = 50 K. [...]

Although the pressurised water reactors (PWR) in Western Europe differ considerably from the "Chernobyl type" nuclear power plants that blew up in the Ukraine on April 26$^{th}$ 1986, a melt down of their core could lead to the accidental release of radioactive aerosols. Such metal particles of a mean aerodynamic diameter of about 1 $\mu$m were artificially generated in the European RESSAC Programme to investigate the radionuclide transfer into the food chain. [...]