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Tytuł:
From a Noble Substance to an Imitative Body. The Image and Meaning of Wax Figures in a Votive Offering
Autorzy:
Jagla, Jowita
Powiązania:
https://bibliotekanauki.pl/articles/1798729.pdf
Data publikacji:
2019-10-30
Wydawca:
Katolicki Uniwersytet Lubelski Jana Pawła II. Towarzystwo Naukowe KUL
Tematy:
wax, wax figure, votive offering, iconography, symbolism
Opis:
The Polish version of the article was published in Roczniki Humanistyczne vol. 62, issue 4 (2014). In a wealth of votive gifts, the wax ones undoubtedly deserve special attention. They were common as early as in the Middle Ages, and they were used until the 20th century. There was a variety of such votive offerings, starting with candles, through lumps of wax, and ending with full-scale wax figures that started being used as a votive gesture at the break of the 13th and 14th centuries in the north of Europe. In the 15th and 16th centuries this custom became popular among the wealthy German, Austrian and Italian noblemen. Making wax votive figures took a lot of skill so they were made by specially qualified artists (in Italy wax figures called Boti were produced by sculptors called Cerajuoli or Fallimagini). Religious orders collaborated with the artists-artisans, undertaking to supply wax, whereas the artisans prepared wooden frames, natural hair, glass eyes, paints, textiles and brocade. In the following centuries, the production of wax figures developed ever more dynamically, especially in the north of Europe, with less skilled wax modellers, artisans and gingerbread makers often being their producers. The latter ones mainly made smaller wax figures, cast or squeezed from two-part concave models (this type of items in their form and type reminded of figures made of gingerbread). Wax votive figures (especially of children aged three to 12) funded in the area of Upper and Lower Franconia (the Bamberg and Würzburg dioceses) from the mid-19th to the mid-20th century are a separate and rather unusual phenomenon. Popularity of this votive offering became stable about 1880, in the years 1900–1910 it reached its climax; and in the 1950s it came to an end. Franconian offerings were always constructed in a similar way: they had wax faces and hands (more rarely feet), and the other members were made of wood, metal and some other padding materials. Dolls were a dominating model for the production of these votes, and that is why, like dolls, they had wigs made of natural hair on their heads, glass eyes and open mouths. A very important role was played by clothing, in which figures were willingly dressed; they were children’s natural, real clothes (girls were often dressed in the First Communion dresses); moreover, the effigies had complete clothing, which means they had genuine underwear, tights, leather shoes. The figures were supplied with rosaries and bouquets held in their hands, and on the heads of girls there were garlands. The figures were put in cabinets and glass cases, sometimes with wallpaper on the back wall, and they had a longer text on the front glass with the name of the child, or possibly of its parents, and the time when the figure was offered. Despite the many features making the Franconian offering deposits different from votive figures from other regions, all these items are joined by a timeless and universal idea, in which—to quote H. Belting—“an artificial body has assumed the religious representation of a living body…”
Źródło:
Roczniki Humanistyczne; 2019, 67, 4 Selected Papers in English; 59-79
0035-7707
Pojawia się w:
Roczniki Humanistyczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Identification of Gas Products from Pyrolysis Process of Waxes Used in Lost-Wax Casting Technology
Autorzy:
Żymankowska-Kumon, S.
Kolczyk-Tylka, J.
Powiązania:
https://bibliotekanauki.pl/articles/106933.pdf
Data publikacji:
2018
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
lost-wax casting
foundry wax
gas chromatography
mass spectrometry
Opis:
Foundry waxes currently used in lost-wax casting technology are composed of paraffin, stearin, and – to a lesser extent – ceresin, polyethylene wax, and other natural and synthetic waxes. Most of these compounds are non-toxic; however, they may release aromatic hydrocarbons as a result of exposure to high temperatures. Based on a chromatographic analysis (pyrolysis gas chromatography-mass spectrometry, Py-GC/MS), the compounds that are separated from the popular wax mixtures used in foundries were evaluated (as well as the impact they may have on foundry workers). For this purpose, the three main stages of the process (wax, burnout, and pouring) were analyzed, and the appropriate test temperature was chosen (similar to the actual conditions during the process).
Źródło:
Journal of Casting & Materials Engineering; 2018, 2, 3; 53-56
2543-9901
Pojawia się w:
Journal of Casting & Materials Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Mould Material on the Mechanical Properties of Wax Models
Autorzy:
Kroma, Arkadiusz
Brzęk, P.
Powiązania:
https://bibliotekanauki.pl/articles/2079829.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
FDM
Fused Deposition Modeling
investment casting
wax models
mechanical properties
wax injection dies
odlewanie inwestycyjne
modele woskowe
właściwości mechaniczne
matryce do wtrysku wosku
Opis:
The article presents results of research on the influence of the mould material on selected mechanical properties of wax models used for production of casting in investment casting method. The main goal was to compare the strength and hardness of samples produced in various media in order to analyse the applicability of the 3D printing technology as an alternative method of producing wax injection dies. To make the wax injection dies, it was decided to use a milled steel and 3D printed inserts made using FDM (Fused Deposition Modeling) / FFF (Fused Filament Fabrication) technology from HIPS (High Impact Polystyrene) and ABS (Acrylonitrile Butadiene Styrene). A semi-automatic vertical reciprocating injection moulding machine was used to produce the wax samples made of Freeman Flakes Wax Mixture – Super Pink. During injection moulding process, the mould temperature was measured each time before and after moulding with a pyrometer. Then, the samples were subjected to a static tensile test and a hardness test. It was shown that the mould material influences the strength properties of the wax samples, but not their final hardness.
Źródło:
Archives of Foundry Engineering; 2021, 21, 3; 48-52
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Detailed characterization of the substrate specificity of mouse wax synthase
Autorzy:
Miklaszewska, Magdalena
Kawiński, Adam
Banaś, Antoni
Powiązania:
https://bibliotekanauki.pl/articles/1039576.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
fatty alcohols
lipids
wax esters
acyl-CoA
Opis:
Wax synthases are membrane-associated enzymes catalysing the esterification reaction between fatty acyl-CoA and a long chain fatty alcohol. In living organisms, wax esters function as storage materials or provide protection against harmful environmental influences. In industry, they are used as ingredients for the production of lubricants, pharmaceuticals, and cosmetics. Currently the biological sources of wax esters are limited to jojoba oil. In order to establish a large-scale production of desired wax esters in transgenic high-yielding oilseed plants, enzymes involved in wax esters synthesis from different biological resources should be characterized in detail taking into consideration their substrate specificity. Therefore, this study aims at determining the substrate specificity of one of such enzymes -; the mouse wax synthase. The gene encoding this enzyme was expressed heterologously in Saccharomyces cerevisiae. In the in vitro assays (using microsomal fraction from transgenic yeast), we evaluated the preferences of mouse wax synthase towards a set of combinations of 11 acyl-CoAs with 17 fatty alcohols. The highest activity was observed for 14:0-CoA, 12:0-CoA, and 16:0-CoA in combination with medium chain alcohols (up to 5.2, 3.4, and 3.3 nmol wax esters/min/mg microsomal protein, respectively). Unsaturated alcohols longer than 18°C were better utilized by the enzyme in comparison to the saturated ones. Combinations of all tested alcohols with 20:0-CoA, 22:1-CoA, or Ric-CoA were poorly utilized by the enzyme, and conjugated acyl-CoAs were not utilized at all. Apart from the wax synthase activity, mouse wax synthase also exhibited a very low acyl-CoA:diacylglycerol acyltransferase activity. However, it displayed neither acyl-CoA:monoacylglycerol acyltransferase, nor acyl-CoA:sterol acyltransferase activity.
Źródło:
Acta Biochimica Polonica; 2013, 60, 2; 209-215
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structuring role of F-T synthetic wax in bitumen
Autorzy:
Iwański, M.
Mazurek, G.
Powiązania:
https://bibliotekanauki.pl/articles/202273.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
bitumen
synthetic wax F-T
ductility
rheology
morphology
group type
Opis:
The reduction in asphalt mixture production and placement temperatures can be achieved by modifying bitumen 35/50 with the Fischer-Tropsch synthetic wax. To identify the role this modifier plays in the bitumen 35/50, a series of tests has been performed. The experiment was carried out for wax doses from 1.5% to 4.0%. Analysis of the modified binder properties such as ductility at 5, 15 and 25◦C, complex modulus G* with the parameter G*/sinx and LSV, susceptibility according to MSCR procedure, morphology and group type analysis helped describe the structuring function of the F-T wax in the binder. The optimum F-T wax content of 2.5% has been identified to provide the desired parameters required for modified binders.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2014, 62, 3; 525-534
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation criteria of wax pattern strength tests and their role in forecasting the shape accuracy of wax patterns
Autorzy:
Haratym, R.
Biernacki, R.
Lewiński, J.
Kwapisz, J.
Powiązania:
https://bibliotekanauki.pl/articles/381367.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
pattern strength
lost wax casting
pattern test
sustainability
recycling
wzór wytrzymałościowy
metoda traconego wosku
test wytrzymałościowy
recykling
Opis:
This research paper will present and analyze selected testing of wax patterns - bending strength test, test of resistance to creep and penetration hardness test. Evaluation of these tests will be carried out in terms of the shape accuracy of wax patterns. Additionally, statistical evaluation will be carried out of relationships between selected parameters of previously mentioned tests. Standard bending tests will be statistically evaluated and compared with two other test methods conducted on corresponding patterns. Particular attention will be given to creep resistance, which is a very useful test method for assessing changes in the shape of complex patterns in the function of time and temperature. At the same time an evaluation of hardness tests of wax patterns will be carried out with usage of appropriate samples or by direct examination of the production patterns.
Źródło:
Archives of Foundry Engineering; 2013, 13, 4; 49-52
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Temperature-dependent regulatory mechanism of larval development of the wax moth (Galleria mellonella).
Autorzy:
Cymborowski, Bronisław
Powiązania:
https://bibliotekanauki.pl/articles/1044435.pdf
Data publikacji:
2000
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
ecdysteroids
brain proteins
larval diapause
physiology
wax moth
Galleria mellonella
storage proteins
Opis:
The mechanisms underlying larval diapause in the wax moth (Galleria mellonella) is one of the most throughly studied aspects. At the low temperature of 18°C, the last instar larvae did not pupate but transferred to 30°C they initiated development and pupation in a circadian manner. Different types of surgical manipulations including head-ligation, nerve cord-severance, implantation of the brain, prothoracic glands, accompanied with ecdysteroid titre measurements indicated that diapausing arrest of larval development at 18°C might be due to the nervous inhibition of their prothoracic glands.
Źródło:
Acta Biochimica Polonica; 2000, 47, 1; 215-221
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ wybranego modyfikatora na właściwości asfaltu
The influence of the synthetic wax on rheological properties of bitumen
Autorzy:
Iwański, M.
Mazurek, G.
Powiązania:
https://bibliotekanauki.pl/articles/144058.pdf
Data publikacji:
2011
Wydawca:
Stowarzyszenie Inżynierów i Techników Komunikacji Rzeczpospolitej Polskiej
Tematy:
asfalt
wosk syntetyczny
reologia
asphalt
synthetic wax
rheology
Opis:
Celem badań była analiza wpływu nowoczesnego wosku alifatycznego na wybrane cechy lepko-sprężyste asfaltu. Przygotowano sześć wariantów modyfikacji poprzez dozowanie dodatku wosku syntetycznego, w zakresie od 1,5%(m/m) do 4%(m/m) ze zmianą co 0,5%(m/m). Temperatura badania została ustalona w zakresie od 50°C do 145°C. Wyniki przeprowadzonych badań ujawniły, że zastosowany modyfikator istotnie wpływa na oceniane właściwości reologiczne już przy zawartości około 1% w stosunku do masy modyfikowanego asfaltu.
The purpose of research was the analysis of the effect of modern synthetic wax on some rheological properties of bitumen. Six variants of the modification were prepared by application the synthetic wax in the range of 1,5% to 4% with changes every 0,5%. The temperature of examination was established in the scope from 50°C to 145°C. It was determined that the modifier indeed influences on examined rheological parameters of bitumen in amount of 1 % in relation to the bitumen.
Źródło:
Drogownictwo; 2011, 10; 313-317
0012-6357
Pojawia się w:
Drogownictwo
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Od substancji szlachetnej do ciała imitacyjnego. Obraz i znaczenie figur woskowych w geście wotywnym
From a Noble Substance to an Imitative Body. The Picture and the Meaning of Wax Figures in a Votive Gesture
Autorzy:
Jagla, Jowita
Powiązania:
https://bibliotekanauki.pl/articles/1887742.pdf
Data publikacji:
2014
Wydawca:
Katolicki Uniwersytet Lubelski Jana Pawła II. Towarzystwo Naukowe KUL
Tematy:
wosk
figura woskowa
wota
ikonografia
symbolika
wax
wax figure
votive gifts
iconography
symbolism
Opis:
W bogatym zbiorze darów wotywnych na niewątpliwą uwagę zasługują wota woskowe powszechne już od wczesnego średniowiecza i wykorzystywane po wiek XX. Wota te miały dużą różnorodność, począwszy od świec po bryły wosku, aż wreszcie woskowe figury często naturalnych rozmiarów, które zaczęły być wykorzystywane w geście wotywnym na przełomie XIII i XIV wieku na północy Europy. W XV i XVI wieku zwyczaj ten upowszechnił się wśród majętnej szlachty niemieckiej, austriackiej i włoskiej. Wykonanie woskowych figur wotywnych wymagało znacznej wprawy, dlatego wytwarzali je specjalnie wykwalifikowani artyści (we Włoszech figury woskowe zwane Boti wytwarzali twórcy określani mianem Cerajuoli albo Fallimagini), klasztory współpracowały z artystami - rzemieślnikami zobowiązując się dostarczać wosk, natomiast rzemieślnicy przygotowywali materiał, czyli drewniane stelaże, naturalne włosy, szklane oczy, farby, tekstylia i brokat. W kolejnych stuleciach produkcja wotów woskowych rozwijała się coraz prężniej, szczególnie na północy Europy, przy czym wytwórcami powyższych obiektów stawali się często mniej zdolni modelatorzy woskowi, rzemieślnicy i piernikarze. Ci ostatni wykonywali głównie figury woskowe o mniejszych rozmiarach, odlewane bądź wyciskane z dwuczęściowych wklęsłych modeli (ten typ wotów przypominał w swojej formie i ujęciu figury z pierników). Odrębne i dość niezwykłe zjawisko stanowią wotywne figury woskowe (szczególnie dzieci w wieku od trzech do dwunastu lat) fundowane na obszarze Górnej i Dolnej Frankonii (diecezje Bamberg i Wiirzburg) od połowy XIX stulecia do połowy wieku XX. Aktywizacja popularności tego gestu wotywnego okrzepła mniej więcej około 1880 roku, punkt kulminacyjny osiągnął on w latach 1900-1910 i skończył się w latach pięćdziesiątych XX stulecia. Frankońskie wota konstruowano zawsze w podobny sposób: miały one woskowe twarze i dłonie (rzadziej stopy), pozostałe zaś członki wykonywano z drewna, metalu i różnych materiałów wyściełających. Dominującym wzorem dla produkcji owych wotów były lalki, dlatego tak jak lalki miały one na głowach peruki z naturalnych włosów, szklane oczy i otwarte usta. Niezwykle ważną rolę pełniły ubrania, w które odziewano figury, będące naturalnymi, prawdziwymi strojami dzieci (dziewczynki chętnie ubierano w sukienki z pierwszej komunii); co więcej wota te posiadały strój kompletny, a więc ubierano je w autentyczną bieliznę, pończochy, skórzane buciki. Figury ozdabiano różańcami i bukietami kwiatków trzymanych w dłoniach, oraz wiankami na głowach wotów dziewczęcych. Figury ustawiano w szklanych gablotach, witrynach i kasetach wyklejanych niekiedy z tyłu tapetą i podpisywanych na przedniej szybie dłuższym tekstem, który wyjaśniał dane wotantów (imię i nazwisko dziecka, ewentualnie jego rodziców) i czas ofiarowania figury. Mimo wielu cech różniących frankońskie wota od wotywnych figur z innych regionów, wszystkie te obiekty łączy ponadczasowa i ponadterytorialna idea, w której cytując H. Beltinga „sztuczne ciało przejęło religijną reprezentację żywego ciała [...]”.
In a rich arsenal of votive gifts wax ones undoubtedly deserve a special attention. They were common as soon as early Middle Ages and they were used until the 20th century. There was a variety of such votes, starting with candles, through lumps of wax, and ending with full-scale wax figures that started being used as a votive gesture at the break of the 13th and 14th centuries in the north of Europe. In the 15th and 16th centuries this custom became popular among the wealthy German, Austrian and Italian noblemen. Making wax votive figures took a lot of skill so they were made by specially qualified artists (in Italy wax figures called “Boti” were produced by sculptors called “Cerajuoli” or “Fallimagini”). Religious orders collaborated with the artists-artisans, undertaking to supply wax, whereas the artisans prepared wooden frames, natural hair, glass eyes, paints, textiles and brocade. In the next centuries the production of wax votes developed ever more dynamically, especially in the north of Europe, with less skilled wax modelers, artisans and gingerbread bakers often being their producers. The latter ones mainly made smaller wax figures, cast or squeezed from two-part concave models (this type of votes in its form and type reminded of figures made of gingerbread). Wax votive figures (especially of children aged three to twelve) founded at the area of Upper and Lower Franconia (the Bamberg and Würzburg Dioceses) from the middle of the 19th to the middle of the 20th century are a separate and rather unusual phenomenon. Popularity of this votive gesture became stable about 1880, in the years 1900-1910 it reached its climax; and in the 1950s it came to an end. Franconian votes were always constructed in a similar way: they had wax faces and hands (more rarely feet), and the other members were made of wood, metal and some other padding materials. Dolls were a dominating model for the production of these votes, and that is why, like dolls, they had wigs made of natural hair on their heads, glass eyes and open mouths. A very important role was played by clothing, in which figures were willingly dressed; they were children’s natural, real clothes (girls were often dressed in the First Communion dresses); moreover, the votes had complete clothing, which means they had genuine underwear, tights, leather shoes. The figures were supplied with rosaries and bouquets held in their hands, and on the heads of girls there were garlands. The figures were put in cabinets and glass cases, sometimes with wallpaper on the back wall, and they had a longer text on the front glass with the name of the child, or possibly of its parents, and the time when the figure was offered. Despite the many features making the Franconian votes different from votive figures from other regions, all these object are joined by a timeless and universal idea, in which – quoting H. Belting – “an artificial body has assumed the religious representation of a living body (…)”.
Źródło:
Roczniki Humanistyczne; 2014, 62, 4; 89-110
0035-7707
Pojawia się w:
Roczniki Humanistyczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of selected properties of asphalt concrete with synthetic wax
Autorzy:
Mazurek, G.
Iwański, M.
Powiązania:
https://bibliotekanauki.pl/articles/202091.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
initial yield strength
synthetic wax
Prony Series
pseudo-strain
viscoplastic deformation
granica plastyczności
wosk syntetyczny
szereg Prony
Opis:
This article discusses the issue of viscoplastic deformation that usually occurs in road pavements, especially in the summer season in Poland. The evaluation of viscoplastic deformations was performed on the example of the asphalt concrete designated for the binding course layer (AC16W). Additionally, the bitumen used for manufacturing asphalt concrete samples was modified with two types of synthetic waxes widely applied in the warm mix asphalt technology. These waxes varied in molecular weight, which affected their softening point results. Before decomposition of the total strain into elastic and viscoplastic part, oscillatory tests in the linear viscoelastic region were required. The generalized Maxwell model was used to describe the behavior of asphalt concrete in the linear viscoelastic range. Using the elasto-viscoelastic correspondence principle, described by Schapery, the initial yield strength stress was evaluated. The pseudostrain variable turned out to be useful for estimating the onset of viscoplastic strains occurring in road pavement. Such engineering procedure approach could result in faster approximation of the yield strength level during the design of pavement structures. It will also allow for differentiation of mixtures in terms of their susceptibility to permanent deformation and of their sensitivity to traffic induced overloading.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2018, 66, 2; 217-228
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania nad wytwarzaniem emulsji woskowych metodą emulgowania wysokociśnieniowego oraz ultradźwiękowego
Research on the production of wax emulsions with high-pressure and ultrasonic emulsification
Autorzy:
Antosz, A.
Ptak, S.
Powiązania:
https://bibliotekanauki.pl/articles/1835425.pdf
Data publikacji:
2017
Wydawca:
Instytut Nafty i Gazu - Państwowy Instytut Badawczy
Tematy:
emulsje
emulsje woskowe
emulsions
wax emulsions
Opis:
We wstępnej części artykułu przedstawiono cztery zasadnicze metody wytwarzania emulsji. W części doświadczalnej zaprezentowano wyniki badań nad sporządzaniem emulsji woskowych przy użyciu dwóch różnych technik emulgowania: wysokociśnieniowego i ultradźwiękowego z zastosowaniem jonowych i niejonowych emulgatorów. Dokonano porównania wybranych właściwości fizykochemicznych wytworzonych emulsji.
The first part of the paper presents four basic methods of producing emulsion. In the experimental part, are presented, results of the research on wax emulsion production conducted using two different emulsification techniques: high-pressure and ultrasonic with the use of ionic and non-ionic emulsifiers. A comparison was made of selected physico-chemical properties of the produced emulsion.
Źródło:
Nafta-Gaz; 2017, 73, 3; 200-207
0867-8871
Pojawia się w:
Nafta-Gaz
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ioannis Motsianos and Karen S. Garnett (Eds), "Glass, wax and metal: lighting technologies in late antique, byzantine and medieval times", Oxford: Archaeopress, 2019 – book review
Autorzy:
Chrzanovski, Laurent
Powiązania:
https://bibliotekanauki.pl/articles/1634104.pdf
Data publikacji:
2020-01-15
Wydawca:
Uniwersytet Warszawski. Wydawnictwa Uniwersytetu Warszawskiego
Tematy:
lighting technologies
Byzantine
late antique
medieval
wax
Źródło:
Polish Archaeology in the Mediterranean; 2019, 28(1); 671-673
1234-5415
Pojawia się w:
Polish Archaeology in the Mediterranean
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of various film packaging, wax coating and storage conditions on the shelf life and quality of pomegranate fruits
Autorzy:
Safizadeh, M.R.
Powiązania:
https://bibliotekanauki.pl/articles/1834.pdf
Data publikacji:
2019
Wydawca:
Instytut Ogrodnictwa
Tematy:
pomegranate
Punica granatum
chemical analysis
cold storage
storage condition
wax coating
plastic film
Źródło:
Journal of Horticultural Research; 2019, 27, 2
2300-5009
Pojawia się w:
Journal of Horticultural Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Epicuticular wax on stomata of damaged silver fir trees [Abies alba Mill.]
Autorzy:
Bacic, T
Krstin, L.
Rosa, J.
Popovic, Z.
Powiązania:
https://bibliotekanauki.pl/articles/56785.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
abaxial leaf epidermis
silver fir tree
fir decline
epicuticular wax change
Abies alba
air pollution
Pinaceae
stoma
Opis:
Condition of epistomatal wax on the abaxial surface of the current and previous-year needles of damaged silver fir trees (Abies alba Mill.), both from the polluted Risnjak and "clean" Donja Dobra sites in Gorski Kotar region, both influenced by pollutants coming from Europe, during two years, three times a year, were examined with Scanning Electron Microscope. In the course of time the wax tubules on the epistomatal rims of stomata in polluted, but also in "clean" needles surface, become fused and agglomerated rapidly to various extents of morphologically different types of amorphous wax crusts, primarily compact and particulate ones. This process begins very early, especially in polluted Risnjak site, and may be interpreted as a possible result of air pollution. However, the recrystalization, or production of new tubules, also appears relatively quickly in mostly cases. Quantitative estimations indicate a very large total amount of amorphous wax crusts in the current-year needles, and a very high percentage of the same wax in previous-year needles. Amorphous wax crusts cover stomatal pores, as well as the rims, disturbing the normal gas exchange. Statistically there is a signicant tendency of increase in wax degradation in the needles of the polluted site in comparison with those of the unpolluted one, but there is an insignificant wax degradation among the needles of damaged trees within each site. These results confirmed most of the research done in our preliminary report.
Źródło:
Acta Societatis Botanicorum Poloniae; 2005, 74, 2
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of Physical Properties of Wax Mixtures Obtained From Recycling of Patterns Used in Precision Casting
Ocena właściwości fizycznych mieszanek woskowych uzyskanych na drodze recyklingu modeli dla odlewnictwa precyzyjnego
Autorzy:
Biernacki, R.
Haratym, R.
Bałkowiec, A.
Wawulska-Marek, P.
Matysiak, H.
Zdunek, J.
Kurzydłowski, K. J.
Powiązania:
https://bibliotekanauki.pl/articles/354030.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
investment casting
wax pattern
wax blends
pattern properties
odlewanie
mieszanki wosku
ocena właściwości
mieszanina modelowa
Opis:
The study investigated the properties of selected certified mixtures used to make wax patterns for the production of precision castings for the aerospace industry. In addition, an assessment of the recycled mixtures consisting of certified wax materials recovered during autoclaving was carried out. Hardness was tested via a proposed method based on penetration, creep related deformation, bending strength and linear contraction. The hardness was studied on laboratory specimens and patterns made with the use of injection molding equipment. For these patterns, linear contraction was estimated at variable pressure and for different temperature injection parameters. Deformations connected with creep and resistance were evaluated on cylindrical specimens. Differences in creep resistance in relation to the hardness were observed depending on the type of pattern mixtures. Recycled mixture has a greater resistance and smaller linear contraction than certified mixtures used for making sprue, raisers and other parts of filler system.
W pracy zbadano właściwości wybranych mieszanek modelowych atestowanych stosowanych do wykonywania modeli wytapianych przy produkcji odlewów precyzyjnych dla przemysłu lotniczego. Dodatkowo badaniom poddano masę z recyklingu składająca się z odzyskanych w procesie autoklawizacji mieszanek woskowych atestowanych. Zaproponowano badania twardości metodą penetracji, odkształceń związanych z pełzaniem, wytrzymałości na zginanie oraz skurczu liniowego. Twardość badano na próbkach laboratoryjnych oraz na modelach wykonanych na wtryskarce przemysłowej. Dla tych modeli oszacowano skurcz liniowy przy zmiennych parametrach ciśnienia i temperatury wytrysku. Odkształcenia związane z pełzaniem i wytrzymałość badano na modelach walcowych. Obserwuje się różnice odporności na pełzanie w odniesieniu do twardości w zależności od rodzaju mieszanki modelowej. Masa z recyklingu ma większą odporność i mniejszy skurcz liniowy niż masa atestowana stosowana na układy wlewowe.
Źródło:
Archives of Metallurgy and Materials; 2015, 60, 1; 345-349
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł

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