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The system coprises a thin element for the visual monitoring of the exposition dose. Its application is expected in various practical fields, such as phototherapy, museums, skin protection, food safety, phramaceuticals safety, construction materials, etc. The time variable is calibrated via the colour change. It is based on the utilisation of different stabilites of many tested chemicals. Their light induced decomposition is manifested as decolorization. The decolorization is described kinetically, and then associated in a cumultaive form with a certain characteristic dose. The dose reflects the amount of absorbed light, and it has many practical consequences in the mentioned fields.

The described element is intended to provide a substantial information about the protected document if stolen, and then tracked. Its major use is supposed for archives, galeries, museums, art collections etc. It contains a combination of specific elements from the periodic table with a distinctive XRF response. Ususally there are four elements in use. Their combinations when using their diffrent amounts, typically up to 5 levels for each, allow a high number of codes to be encrypted.

The utility model deals with a catalyst in the form of solid particles containing activated carbon, on which metal oxides selected from the group of MgO, La2O3, Sm2O3 and CuO are deposited. The catalyst can also be supported on a nanofibrous carrier for fixing in a batch reactor stirrer. The catalyst is intended for the valorization of primary alcohols, especially ethanol and butanol, associated with the condensation of new carbon-carbon bonds to form hydrocarbons and hydrocarbon derivatives with a carbon chain longer than four.

This paper describes a study of welded steel plate joints using experimental and numerical methods. The objectives of this study are to observe the mechanical behavior of welded plate joints under monotonic and cyclic loads, identify their damage degradation processes, and provide useful test data for future damage analysis of beam-column connections in steel frame structures. Six specimens were designed, of which three were tested under monotonic loads, and the other three were tested under cyclic loads. The test setup consisted of three plates arranged in a cruciform and connected by two groove welds. The monotonic and cyclic loads were applied to the free end of the two outstanding plates, inducing a pulling force on the welded joint. Because the only element studied in the present work is the weld, the sizes of the three plates were kept constant. The responses of these welded plate joints are discussed in terms of their experimentally and numerically obtained mechanical parameters, hysteretic behavior, strain variations, stiffness degradation, damage process, and failure modes. The results show that the energy damage model outperforms the displacement damage model in terms of indicating the degree of damage. Furthermore, if designed according to code, all these welded plate joints perform satisfactorily.

Solution relates to the preparation of new N-alkylamides of alginic acid of formula, in which are those the modification attending in the carboxylic acid groups by esterification followed by an amino-de-alkoxylation and by direct amidation or amino de alkoxylation of an ester to aid microwave heating. This modification results in attachment of various long chain alkyl (depending on the amine used) and the obtained compound obtained hydrophobic character. Of the amines used was selected n-butylamine, n-hexylamine, n-octylamine, n-dodecylamine and n-octadecylamine. Hydrophobic amidated derivatives containing n-alkyl (C4 to C18) are able to function as sorbents nonpolar compounds and thereby decrease the in vivo levels of neutral sterols and triglycerides. Alginates are extracted from brown algae (Phaeophyceae) and have a wide industrial application. This procedure is a modification extends the possibility of recovery.

A tower between two regular languages is a sequence of strings such that all strings on odd positions belong to one of the languages, all strings on even positions belong to the other language, and each string can be embedded into the next string in the sequence. It is known that if there are towers of any length, then there also exists an infinite tower. We investigate upper and lower bounds on the length of finite towers between two regular languages with respect to the size of the automata representing the languages in the case there is no infinite tower. This problem is relevant to the separation problem of regular languages by piecewise testable languages.

Modul for vertical photobioreactor with tube. Utility pattern. Czech republic. CZ35857 U1

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