Sublimation Drying of Fish Products in the Arctic in the Production of Feed for Farm Animals

Introduction. The article considers biological resources of the Arctic, which is expedient to use in the production of fish meal for feeding farm animals. The aim of the research is to prove the usefulness of a continuously operating two-chamber line for sublimation drying of fish products using natural freezing of fish catch and a cheap source of thermal energy for drying: ethane, propane, butane (waste when cleaning natural gas and petroleum products of local enterprises), as well as microwave energy. Materials and Methods. A continuously operating two-chamber sublimation line is proposed, the chambers of which work alternately: one for the process of sublimation drying, and the other for loading and unloading processed products. The natural freezing of fish and thermal energy for the process of sublimation (drying) from the burning of waste gas are used whenever possible. When there is cheap electricity, it is advisable to use microwave energy for drying that makes it possible to shorten the drying cycle, ensure uniformity and simultaneity of drying the material up to 3–5% humidity without rearranging the trays along the height of the cart. Results. We propose the construction of a two-chamber sublimation line for large lump products and a sublimation unit based on microwave energy, which allows regulating the sublimation drying temperature within specified limits. Discussion and Conclusion. The presented design solutions of a large lump product sublimation drying line and sublimation unit using microwave energy are necessary for designing equipment based on digital technology

AlGaAs/GaAs Quantum Well Infrared Photodetectors

In this article, we present an overview of a focal plane array (FPA) with 640 × 512 pixels based on the AlGaAs quantum well infrared photodetector (QWIP). The physical principles of the QWIP operation and their parameters for the spectral range of 8–10 μm have been discussed. The technology of the manufacturing FPA based on the QWIP structures with the pixels 384 × 288 and 640 × 512 has been demonstrated. The parameters of the manufactured 640 × 512 FPA with a step of 20 μm have been given. At the operating temperature of 72 K, the temperature resolution of QWIP focal plane arrays is less than 35 mK. The number of defective elements in the matrix does not exceed 0.5%. The stability and uniformity of the FPA have been demonstrated

Single-photon emission from InGaAs quantum dots grown on (111) GaAs

This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Appl. Phys. Lett. 96, 093112 (2010) and may be found at https://doi.org/10.1063/1.3337097.In this letter, we demonstrate that self-organized InGaAs quantum dots (QDs) grown on GaAs (111) substrate using droplet epitaxy have great potential for the generation of entangled photon pairs. The QDs show spectrally sharp luminescence lines and low spatial density. A second order correlation value of g(2)(0)<0.3 proves single-photon emission. By comparing the power dependence of the luminescence from a number of QDs we identify a typical luminescence fingerprint. In polarization dependent microphotoluminescence studies a fine-structure splitting ranging ≤40eV down to the determination limit of our setup (10eV) was observed.DFG, 43659573, SFB 787: Halbleiter - Nanophotonik: Materialien, Modelle, Bauelement