Wyniki wyszukiwania - BazTech

1

Strength estimation of teeth reinforced with different types of post systems

Ryniewicz W., Ryniewicz A. M., Madej W., Wiśniewska G.

Engineering Transactions

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2017

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Vol. 65, iss. 1

147--154

EN

Posts are permanent, single-tooth and periodontal restorations. During chewing, forces make teeth with posts to undergo complex stresses. The aim of this work is to compare and estimate the upper medial incisors restored with custom posts and prefabricated composite posts reinforced with fibreglass using the finite element method. Modelling and numerical analyses provide the opportunity to evaluate the reconstruction of teeth using custom and prefabricated posts.

2

Hortiterapia jako innowacyjna metoda terapii zajęciowej w Polsce

Kalina-Gagnelid A., Wiśniewska G.

Zieleń Miejska

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2016

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Nr 2

50--51

PL

Obecnie większa część populacji ludzi na Ziemi mieszka w miastach. Raport ONZ z 2014 r. wskazuje, że tendencja ta się utrzyma. Kontakt ze środowiskiem przyrodniczym będzie coraz bardziej utrudniony, a jakość życia zacznie maleć. Jednym ze sposobów, by temu przeciwdziałać, jest takie kształtowanie przestrzeni miast, aby ich mieszkańcy mieli łatwy dostęp do terenów zieleni.

3

The evaluation of the accuracy of shape imaging of prosthetic abutment

Ryniewicz W. I., Ryniewicz A. M., Wiśniewska G.

Acta of Bioengineering and Biomechanics

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2016

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Vol. 18, no. 2

43--50

EN

Purpose: The aim of the study was the in vitro evaluation of the accuracy of shape imaging of abutment teeth using different impression compounds. Methods: To compare the accuracy of the shape of the numerically imaged real prosthetic abutments with the tested models of abutments obtained with the replica technique, the Geomagic Qualify program was applied. Making use of the licensed program Statistica, statistical analysis of the results obtained was conducted. Results: In the research procedures, analyses were conducted for 10 abutment premolars and 10 abutment molars. The tests allowed us to state that the dimensional accuracy of the models of prosthetic abutments obtained with the application of elastic compounds tested ensures comparable shape imaging. Conclusions: The objective method developed and applied here is suitable for controlling the imaging of the abutment teeth. The Geomagic Qualify program that was used during the research is a reliable tool of 3D analysis for the estimation of procedure of abutment tooth preparation and indication of an error of shape of prepared occlusal surface, lateral surface of abutment and errors of shaping the chamfer zone.

4

Ocena efektywności nawozów fosforowo-siarkowych produkowanych na bazie mielonego fosforytu. Cz. 1, Technologia wytwarzania nawozów

Korzeniowska J., Stanisławska-Glubiak E., Hoffmann J., Górecka H., Jóźwiak W., Wiśniewska G.

Przemysł Chemiczny

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2014

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T. 93, nr 5

803-806

PL

Badano możliwość zwiększenia agronomicznej efektywności stosunkowo niskiej jakości fosforytu poprzez odpowiedni dodatek siarki i zgranulowanie obu składników metodą kompaktowania. Skomponowano 6 wariantów nawozów fosforowo-siarkowych o różnym stosunku fosforu do siarki i przedstawiono ich skład chemiczny oraz parametry granulacji. Na podstawie zawartości fosforu rozpuszczalnego w kwasie mrówkowym można przypuszczać, że najlepiej dostępny dla roślin będzie fosfor z nawozu o stosunku P:S = 1,35:1. Teza ta wymaga sprawdzenia w warunkach doświadczeń rolniczych.

EN

Morocco phosphate, S, bentonite and molasses were mixed together (P:S ratio 10:1 to 1.35:1) granulated by compacting, dried and analyzed for total and soluble P, S, Ca and Mg by inductively coupled plasma emission spectrometry, as well as for granule size (1.64-4.76 mm) and mech. strength. The granules met the quality requirements for fertilizers.

5

Dostępność fosforu dla roślin z kompostów wzbogaconych fosforytem. Cz. 1, Technologia wytwarzania kompostów

Stanisławska-Glubiak E., Korzeniowska J., Hoffmann J., Józwiak W., Wiśniewska G.

Przemysł Chemiczny

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2014

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T. 93, nr 5

807-810

PL

W celu zwiększenia rozpuszczalności fosforytu kompostowano go z surowcami organicznymi. Używając bioreaktora do kompostowania biomasy, przygotowano 4 warianty kompostów. Do wytworzenia kompostów użyto mielonego fosforytu oraz rozdrobnionej słomy jęczmiennej, trocin i wysłodków buraczanych. Komposty różniły się rodzajem i ilością komponentów organicznych. Gotowe komposty zgranulowano za pomocą prasy matrycowej. Kompostowanie fosforytu z komponentami organicznymi zwiększało jego rozpuszczalność, a tym samym powodowało wzrost dostępności fosforu dla roślin.

EN

Rock phosphate was ground and added to org. composts. After 1-2 months long composting at humidity 60%, the composts were granulated, dried to H2O content below 8% and studied for various P forms. The composting resulted in an increase in content of HCOOH, citric acid and NH4 citrate-sol. P in the rock phosphate.

6

Effect of sulphur added to phosphate rock on solubility and phytoavailability of phosphorus

Stanisławska-Glubiak E., Korzeniowska J., Hoffmann J., Górecka H., Jóźwiak W., Wiśniewska G.

Polish Journal of Chemical Technology

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2014

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Vol. 16, nr 1

81--85

EN

For ground phosphate rock (GPR) to be applied as phosphorus fertilizer, the availability of phosphorus to plants needs to be improved. One possible way to achieve this is by adding sulphur, which will accelerate decomposition of phosphate in soil owing to the activation of microbiological processes. This study involved granulation of fertilizers composed of phosphate and sulphur mixed at 38:1 and 10:1 ratios and two analogous fertilizer variants but with added molasses as a source of organic carbon for sulphur bacteria. A small-scale industrial installation for production of multi-component fertilizers was used to make granular fertilizer by the compaction method. The granular fertilizers were then tested in an agricultural experiment. The fertilizer in which the phosphate to sulphur ratio was 10:1 produced better effects. Addition of molasses to the fertilizers did not improve their fertilizing capacity.

7

Improvement of the solubility of rock phosphate by co-composting it with organic components

Korzeniowska J., Stanisławska-Glubiak E., Hoffmann J., Górecka H., Jóźwiak W., Wiśniewska G.

Polish Journal of Chemical Technology

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2013

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Vol. 15, nr 4

10-14

EN

One possible way to improve the solubility of phosphate rock is by co-composting it with organic substances. Four variants of composts were made in a biomass composting bioreactor. Ground phosphate rock (GPR) and shredded barley straw, pine sawdust as well as beet pulp pellets were used as compost components. The four composts were different from one another in the type and amount of organic components. The composts were granulated in a pelleting press. Changes in the solubility of phosphorus were assessed via chemical analyses and P-recovery efficiency calculated from the data achieved in a pot experiment. Solubility of ground phosphate rock was increased resulting from co-composting with organic substances, which meant that bioavailability of phosphorus increased. All the tested composts were characterized by a higher ratio of ammonium citrate soluble phosphorus to total phosphorus than non-composted GPR. Co-composting GPR with all the tested organic components yielded better effects than composting it with straw alone. The four composts were characterized by a slow release of P, which justifies our expectation that they will produce residual effects in the years following their application.

8

Elektrodializa monopolarna i bipolarna w procesach odzyskiwania wody i kwasu ze ścieków przemysłowych

Wiśniewski J., Wiśniewska G., Winnicki T.

Zeszyty Naukowe. Inżynieria Środowiska / Politechnika Śląska

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2002

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z. 46

283-292

PL

Zastosowano dwustopniową elektrodializę do odzyskiwania wody wysokiej jakości ze ścieków z płukania po trawieniu metali w kwasie siarkowym. Otrzymano wodę o przewodności 37 miS/cm. W celu wydzielenia kwasu z koncentratu kwasu i soli po procesie ED1 zastosowano elektrodializę monoselektywną i elektrodializę bipolarną. Otrzymano kwas zatężony od 51 do 64 razy w stosunku do ścieków surowych.

EN

Two-stage electrodialysis was applied to the recovery of high-quality water from the rinsing wastewater after metal etching in sulphuric acid. Conductivity of the recovered water amounted to 37 miS/cm. Sulphuric acid was recovered from the acid and salt concentrate in the processes of monoselective electrodialysis and bipolar electrodialysis. The acid was 51 to 64 times concentrated comparing to raw wastewater.

9

Application of electrodialysis to water and acid recovery

Wiśniewski J. A., Wiśniewska G.

Environment Protection Engineering

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1999

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Vol. 25, nr 3

145-150

EN

Studies on water and acid recovery from the effluent after metal etching rinse are presented. Water recovery was studied using two alternative systems: electrodialysis 1 (ED1)-cation exchange-electrodialysis 2 (ED2) (System 1) and cation exchange-ED1-ED2 (System 2). System 1 yielded acid-free water which contained trace amounts of metal salts and had a conductivity of 30 mS/cm. System 2 provided water of a better quality - with no acid and metal salts content and its conductivity was 3 mS/cm. only. In order to recover hydrochloric acid from the ED1 concentrate, monoselective electrodialysis was applied. It was found that the acid solution recovered from the concentrate obtained in System 1 was 49 times concentrated comparing to raw wastewater, whereas the acid recovered in System 2 was 74 times concentrated. The calculated cost of water and acid production amounted to 0.4 and 1.55 DEM/m3 in System 1 and System 2, respectively.

PL

Przedstawiono wyniki badań nad odzyskiem wody i kwasu ze ścieków pochodzących z płukania metali po trawieniu. Do odzysku wody wykorzystano dwa alternatywne układy technologiczne: elektrodializę 2 (ED2) (system 1) oraz wymianę kationów - ED1 -ED2 (system 2). W systemie 1 otrzymano wodę pozbawioną kwasu, ze śladową zawartością soli metali, o przewodności 30 mS/cm. W systemie 2 otrzymano wodę o lepszej jakości (pozbawioną kwasu i soli metali), a jej przewodność wynosiła 3 mS/cm. Aby odzyskać kwas solny z koncentratu po procesie ED1, zastosowano elektrodializę monoselektywną. Stwierdzono, że roztwór kwasu otrzymany z koncentratu w systemie 1 był zatężony 49-krotnie w stosunku do ścieków surowych, roztwór kwasu natomiast odzyskany w procesie elektrodializy monoselektywnej w systemie 2 był zatężony 74-krotnie. Obliczony koszt wody i kwasu wyniósł 0,4 DEM/m3 wody w systemie 1 i 1,55 DEM/m3 wody w systemie 2.

10

Zastosowanie membran bipolarnych do odzysku substancji ze ścieków przemysłowych

Wiśniewska G., Wiśniewski J.

Ochrona Środowiska

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1998

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nr 3

39-42

EN

atche process of bipolar elctrodialysis and its pplicastion to the treatment of industrial effluents for the recovery of useful components was discussed in detail.The process was run in two different systems. On of these involved three membranes (cation-exchange,bipolar and anion-exchange),the other one two membranes(bipolar and anion-exchange),the other one two membranes(bipolar and anion-exchange or anion-exchange).The three-membrane system enabled,for example,the recovery of acid and lye from a spent etching bath,acid and amine from the effluent from flue gas desulphurization and nitrogen removal,or acid and amine recovery from wastewater following absorption of the flue gases peroduced during manufacture of aluminium moulds.The two membrane system allowed recovery of only one product - either alkali or acid. The paper also includes an account of the authoress's own investigations into acid recovery from spent etching bath,with the use of a two-membrane system,which yielded a 38% recovery at a small metal ion leakage (1.9 to 2.5%).The results obtained are compared with relevant data reported by other investigators.