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Migracja żelaza w indochinicie podczas jego wygrzewania w 1100°C: badania EMPA i XRD

100%
Brachaniec T., Szopa K., Krzykawski T., Broszkiewicz A.
Acta Societatis Metheoriticae Polonorum
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2014
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vol. 5
47-51
EN
Iron reach tektite represented by indochinite was examined by using EMP and XRD after 120 min long heating in oxide atmosphere at 1100°C. The electron microprobe analyses as well as BSE images reveal loss of iron in tektite bulk composition. Iron as a element was incorporated into a new, probable mineral phase that is mostly present on the surface of the indochinite. Size and textural relation of the Fe-rich phase does not permit to analize it. XRD data does not reveal presence of any mineral rich in Fe including metallic iron.
2
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Jak odróżnić oryginał od fałszywek: kopalny meteoryt z Lechówki

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Szopa K., Karwowski Ł., Krzykawski T., Brachaniec T.
Acta Societatis Metheoriticae Polonorum
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2018
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vol. 9
112-122
EN
Value of meteorites can be explained at least in two aspects. From the scientific point of view they are priceless objects, which can bring important information about the very beginning of the Universe. Because of their rarity anduniqueness, the meteorites often are extremely expensive in the term of a commercial value. This situation is used by dishonest sellers who offer fake meteorites. It has happened with the paleometeorite remnants, which were originallyfound in Cretaceous-Paleogene clay boundary in Lechówka, Poland. The so-called fake Lechówka remnants were offered by one seller on domestic online shops. All grains had certificate of authenticity that was included with the sold grains. In this paper we described the most common and diagnostic features, which can be easily applied to distinguish the original meteorite remnants from the fake ones.
3
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Fragmenty kopalnego meteorytu z Lechówki: charakterystyka mineralogiczna i geochemiczna

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Szopa K., Karwowski Ł., Krzykawski T., Brachaniec T.
Acta Societatis Metheoriticae Polonorum
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2017
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vol. 8
100-109
EN
Fossil iron meteorites are extremely rare in the geological sedimentary record. In the boundary clay from the outcrop at the Lechówka quarry (Poland), fragments of the paleometeorite were found in the Cretaceous-Paleogene boundary clay layer. The fragments of meteorite (2–6 mm in size) and meteoritic dust are metallic-grey in colour. Analyses of the meteorite from Lechówka reveal the presence of Ni-rich minerals with a total Ni amount of 2–3 wt%. They are represented by: taenite, kamacite, schreibersite, Ni-rich magnetite, and Ni-rich goethite. The investigated remnants of paleometeorite apparently represent an independent fall and does not seem to be derived from the K-Pg impactor.
4
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Trynityt – wstępne dane SEM oraz XRD szkliwa nuklearnego z USA

100%
Brachaniec T., Szopa K., Krzykawski T., Broszkiewicz A.
Acta Societatis Metheoriticae Polonorum
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2015
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vol. 6
38-41
EN
Trinitite is a glass produced as a result of a nuclear explosion. The characteristic feature of the investigated material are bubbles and presence of incompletely melted quartz grains.
5
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Topliwość tektytów

88%
Brachaniec T., Szopa K., Krzykawski T., Broszkiewicz A., Szczyrba M.
Acta Societatis Metheoriticae Polonorum
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2014
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vol. 5
21-24
EN
In this paper, results of melting experiment of tektites are presented. Tektites from four strewnfields: North American, Central European, Ivory Coast and Australasian were used. The fragments of investigated tektites were heated in oxide atmosphere in 1100oC in two time intervals: 5 and 120 minutes. The temperature of 1100oC is too low for completely melting of the studied material despite to heating in the same conditions but in small area (eg. in a spot).
6
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Application of selected diffractive and microscopic methods to evaluate the physical state of drug and morphology of microspheres obtained by spray drying of furosemide with Eudragit L30 D-55.

76%
Ostróżka-Cieślik A., Sarecka-Hujar B., Krzykawski T., Karcz J., Banyś A., Jankowski A.
Acta Poloniae Pharmaceutica - Drug Research
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2018
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vol. 75
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issue 3
EN
In pharmaceutical technology, the analysis of physicochemical properties of raw materials, intermediates and products is part of quality control testing at each stage of designing formulations and in the routine evaluation of the final product. The aim of the study was to analyse the physical state of drug and the morphology of microspheres obtained by spray drying, where furosemide was incorporated in the polymeric matrix of Eudragit L30 D-55. The following optimal parameters of the spray drying process were established: aspirator capacity of 80%, T.in: 140 ° C, pump capacity: 10%. The laser diffraction method was used to analyse the size distribution of microspheres in the following furosemide-Eudragit L30 D-55 systems: 1:1, 1:3, 1:5. X-ray powder diffraction was applied to compare the degrees of crystallinity of the final product and the starting material. Furosemide has crystal structure both before and after spray drying, it occurs in the polymorphic forms (form I crystals). No reflection from the crystalline phase has been found on the diffraction pattern of Eudragit. This is an amorphous substance.
7
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Sferule z granicy Kreda-Paleogen (Lechówka, Polska) – wstępne dane

76%
Brachaniec T., Szopa K., Karwowski Ł., Krzykawski T., Salamon M., Brom K.
Acta Societatis Metheoriticae Polonorum
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2015
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vol. 6
17-22
EN
Samples of boundary clay from Cretaceous–Paleogene deposits from Lechówka, Poland were examined for spherules to confirm the impact origin of the sediment. The chemical composition of investigated spherules show similarities to material from the K–Pg boundary from Stevns Klint. The impact genesis of the spherules is confirmed by the presence of nickel-rich spinel grains on their surfaces. The deposits with spherules are built by smectite with Al and Mg enrichment. This cheto smectite is forming as a result of the weathering of the impact glass.
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