Showing papers by "Wrocław University of Technology published in 1992"
127 citations
TL;DR: In this article, a pyrolyzed coal was pyrolysed up to 1700°C in a fixed bed in an atmosphere of the evolved gases, and the sulphur removal of 89.8% was achieved at this temperature.
68 citations
TL;DR: In this paper, a model of the behavior of a number of competing firms producing functionally similar products is presented, where each firm searches for new routines and new combinations of the routines, i.e., technical and organizational ideas and skills associated with a particular economic context.
Abstract: A model is presented of the behavior of a number of competing firms producing functionally similar products. Each firm searches for new routines and new combinations of the routines, i.e. ‘technical and organizational ideas and skills associated with a particular economic context’. Decisions of a firm related to investment, modernization of production, price, etc. are based on the firm's evaluation of the behavior of other competing firms and the expected response of the market. Firms search for new combinations of routines in order to minimize the unit cost of production, maximize the productivity of capital, and maximize the competitiveness of their products in the market. Results of simulation of the model concerning investigation of price setting procedures, and long- and short-term firms' objectives are presented.
64 citations
TL;DR: Among the fats that were tested, tributyrin was the best substrate for the P. citrinum lipase and iron, magnesium, and calcium were found to have an inhibitory effect on enzyme activity.
59 citations
TL;DR: In this article, a nonideal plot can be transformed into a linear C vs (V 0 − V) − 1 2 plot making possible extraction of some interface parameters, such as voltage-capacitance characteristics of metal-semiconductor junctions.
Abstract: Interface states may affect the voltage-capacitance characteristics of metal-semiconductor junctions causing a bending of the (measured) I C 2 vs reverse bias. This nonideal plot can be transformed into a linear C vs (V 0 − V) − 1 2 plot making possible extraction of some interface parameters.
56 citations
TL;DR: Based on results of Pawlak and Wygralak some remarks on the relation between rough sets and fuzzy sets and an improved definition of rough set are given.
53 citations
TL;DR: In this article, the authors considered the dynamic response of non-linear systems to external excitations in form of a Poisson-distributed train of random impulses and obtained the equations governing its joint statistical moments by making use of a generalized Ito's differential rule, truncated with the help of a cumulant-neglect closure of different orders.
53 citations
TL;DR: In this paper, the surface renewal theory is applied to a description of mass transfer at the membrane surrace and the problem of determining the instantaneous permeate flux J(t) in a single element of the freshly renewed membrane surface is solved.
45 citations
41 citations
TL;DR: The wild-type strain of Pseudomonas fluorescens was found to utilize a range of structurally diverse organophosphonates as its sole carbon or nitrogen sources.
Abstract: The wild-type strain of Pseudomonas fluorescens was found to utilize a range of structurally diverse organophosphonates as its sole carbon or nitrogen sources. Representative compounds included aminoalkylphosphonates, hydroxyalkylphosphonates, oxoalkylphosphonates, and phosphono dipeptides. Among them, amino(phenyl)methylphosphonate,2-aminoethylphosphonate, aminomethylphosphonate, diisopropyl 9-aminofluoren-9-ylphosphonate, and 2-oxoalkylphosphonates were used by P. fluorescens as its sole sources of phosphorus. Only slight growth was observed on the herbicide glyphosate (N-phosphonomethylglycine), which was metabolized to aminomethylphosphonate. Neither phosphinothricin nor its dialanyl tripeptide, bialaphos, supported growth of P. fluorescens. The possible mechanisms of organophosphonate degradation by this strain are discussed.
40 citations
TL;DR: In this paper, a family of chromium(III) complexes obtained from the reduction of the chromate ion with ascorbic acid, crysteine and glutathione is described.
TL;DR: In this article, isotope and hydrochemical data of the thermal water system in Cieplice Ṡlaskie Zdroj (Spa) indicate the existence of two subsystems that greatly differ in volume and which meet at the fault zones of a granitic horst, where they discharge at an altitude of about 340m.
TL;DR: Utilization of organophosphonates as the sole source of phosphorus, carbon or nitrogen by a soil isolate of Penicillium citrinum was studied and it was found that the mould did not metabolize any of the phosphonates tested, when they served as the only carbon ornitrogen source.
Abstract: Utilization of organophosphonates as the sole source of phosphorus, carbon or nitrogen by a soil isolate of Penicillium citrinum was studied. Penicillium citrinum was found to utilize 2-aminoethylphosphonic and 2-oxoalkylphosphonic acids as the sole phosphorus source whereas 1-hydroxyalkylphosphonates as well as 1-aminoalkylphosphonates and their dipeptides did not support the growth of the fungus. The mould did not metabolize any of the phosphonates tested, when they served as the sole carbon or nitrogen source.
Penicillium citrinum is perhaps the first mould strain isolated from soil, shown to be capable of organophosphonate degradation.
TL;DR: In this article, acid-catalyzed reactions of long-chain aliphatic aldehydes (Ia-d) with 1,1,1-tris(hydroxymethyl)-ethane (II), 2n-alkyl-5-hydroxmethyl5-methyl-1,3-dioxane (IIIa)-d) were obtained, and they were reacted with SO3·pyridine complex in dry carbon tetrachloride solution, to obtain trisubstituted derivatives of 1,3diox
Abstract: In acid-catalyzed reactions of long-chain aliphatic aldehydes (Ia-d) (a,R=n-C5H11; b,R=n-C7H15; c,R=n-C9H19; d,R=n-C11H23) with 1,1,1-tris(hydroxymethyl)-ethane (II), 2-n-alkyl-5-hydroxymethyl-5-methyl-1,3-dioxanes (IIIa-d) were obtained. Then they were reacted with SO3·pyridine complex in dry carbon tetrachloride solution, to obtain trisubstituted derivatives of 1,3-dioxane (IVa-d). They constitute a new group of chemodegradable, acetal-type anionic surfactants, which may readily hydrolyze and oxidize to nonsurfactant compounds. Physical data of the new compounds and some surface properties, such as Krafft point, critical micelle concentration (CMC), surface tension of aqueous solution near CMC (γCMC) and wetting and foaming properties, were determined. Sodium salts of sulfated 2-n-alkyl-5-hydroxymethyl-5-methyl-1,3-dioxanes (IVa-d) exhibit aqueous solution properties similar to those of the well-known sodium alkyloligooxyethylene sulfates. Presence of the 5-methyl-1,3-dioxane moiety in molecules of compounds IVa-d introduces hydrophobic character comparable to the effect of three oxyethylene groups (-CH2CH2O-) or of two methylene groups (-CH2-) of the alkyl chain in sodium alkyl ether sulfates [R(OCH2CH2)mOSO3Na] with equal R value.
TL;DR: A commercial platinum (Pt) catalyst with 0.15% platinum ingredient (referred to as Pt-O) was investigated for activity in the combustion of chlororganic compounds, for resistance to poisoning, and for potential application to control gas emissions.
TL;DR: In this paper, the 1:3 complex between antimony triiodide and sulfur, SbI3 * 3S8, is found to possess a high second-order optical nonlinearity.
Abstract: Crystals of the 1:3 complex between antimony triiodide and sulfur, SbI3 * 3S8, are found to possess a high second-order optical nonlinearity. The powder second-harmonic generation efficiency is found to be approximately half of that of the isostructural complex of iodoform with sulfur, CHI3 * 3S8. Second-harmonic generation can be phase matched. The phase-matching angle of type I is found to be approximately 30° at the fundamental wavelength 1.064 μm. The Maker fringes’ measurements give χ222(2)≅16 pm/V, χ333(2)≅23 pm/V and χ311(2)≅15 pm/V, for the values of the components of the second-order susceptibility tensor. The third-rank hyperpolarizability tensor β was decomposed into irreducible parts; the norms of the vector part and the septor (octupolar) part in the SbI3 * 3S8 complex were evaluated to be βυ = 52.1 × 10−40 m4/V and βs = 20.2 × 10−40 m4/V, respectively.
TL;DR: The problems addressed at process realizability testing and deadlock avoidance policy are proved to be NP-hard, hence practically intractable, and a pragmatic, more restrictive but practically applicable, solution for handling the deadlock problems in FAS is discussed.
TL;DR: In this article, smooth points of the unit sphere of ORLICZ spaces equipped with LUXEMBURG norm are characterized for a non-atomic measure as well as for the counting measure.
Abstract: Smooth points of the unit sphere of ORLICZ spaces equipped with LUXEMBURG norm are characterized for a non-atomic measure as well as for the counting measure. As a corollary, a criterion of smoothness of ORLICZ spaces with LUXEMBURG norm is obtained.
TL;DR: In this paper, a single-degree-of-freedom hysteretic system subjected to a specific non-Gaussian random excitation in the form of a Poisson-distributed train of random pulses is considered.
TL;DR: In this paper, the relationship between the hierarchy of chaos and estimation for the stochastic process is investigated, and the results are based on the Correspondence Principle for the PC processes.
01 Jan 1992
TL;DR: In this paper, it has been determined that ion-water and cation-surface active anion interactions govern the ion flotation selectivity, when a sublate was not formed in the bulk solution.
Abstract: It has been determined that ion-water and cation-surface active anion interactions govern the ion flotation selectivity, when a sublate was not formed in the bulk solution. The flotation selectivity orders of anions were correlated with the experimentally-determined viscosity coefficients, whereas the flotation selectivity orders of cations were correlated with their ionic potential values. It has been found that, if sublate precipitation takes place in the bulk solution, the surface charge of sublate was the key factor influencing the floatability of an ion. Basic properties of sublates, e.g. the solubility and electrokinetic potential in aqueous solution have been determined. Ion flotation kinetics, using cobalt(II) and cobalt(III) ions as an example, is also considered in this study.
TL;DR: In this article, an optical fiber silicon pressure sensor with a bossed membrane has been fabricated and a photovoltage proportional to the degree of deflection of the membrane is generated in the junction.
Abstract: A novel optical-fiber silicon pressure sensor with a bossed membrane has been fabricated. The pressure deflects the micromachined thin membrane and moves the end of a fiber illuminating the p-n junction fabricated near the edge of the membrane in a standard IC process. A photovoltage proportional to the degree of deflection of the membrane is generated in the junction. A nontypical output voltage versus inlet pressure characteristic has been obtained.
TL;DR: In this article, the heterogeneity coefficient of deformed sheet metal described by surface roughness was introduced into Jalinier theory of computation of forming limit diagrams, and in the same manner the heterogeneity coefficients are altered.
TL;DR: The uptake of lead from aqueous solution by Chlorella vulgaris and Chlamydomonas sp. was studied after 20 min or 5-7 days exposure to Pb(II).
TL;DR: In this article, two series of carriers based on acrylonitrile (AN)-vinyl acetate (VA)-divinylbenzene (DVB) terpolymers were obtained by aminolysis of nitrile groups to N-alkylamino ones.
TL;DR: In this article, the authors reviewed the research carried out on polar molecular solids: low-molecular weight molecular crystals and polymers, the attention being focused on details of their molecular architecture leading to a possible appearance of ferroelectricity.
Abstract: The paper reviews the research carried out on polar molecular solids: low-molecular weight molecular crystals and polymers, the attention being focused on details of their molecular architecture leading to a possible appearance of ferroelectricity. Possible directions of search for molecular ferooelectrics are discussed in the paper: it is believed that novel ferroelectric materials may be sought among crystals built of molecules undergoing subtle conformational changes, and in weak CT complexes undergoing specific phase transitions.
TL;DR: In this paper, the authors synthesized and screened for herbicidal activity on Lepidium sativum L. L. appeared to be more tolerant to these analogues, while their influence on shoot growth was negligible.
Abstract: Phosphonic and phosphinic acid analogues of glutamic and aspartic acids were synthesized and screened for herbicidal activity on Lepidium sativum L. Depending on the chemical structure, they exhibited significant or moderate herbicidal activity against L. sativum roots (with some representatives being equipotent with phosphinothricin), while their influence on shoot growth was negligible. Cucumis sativus L. appeared to be more tolerant to these analogues. The origin of this selectivity remains to be determined.