Wszystkie pola: Polanski - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Investigations of the Surface Dielectric Function by Means of the Scanning Ellipsometry and Transition Radiation Methods
Autorzy:: Luz Martinez Montes de la, José
Polański, Krzysztof
Powiązania:: https://bibliotekanauki.pl/articles/1038284.pdf
Data publikacji:: 1990
Wydawca:: Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Opis:: We describe the scanning ellipsometry and transition radiation methods as well as their applications to surface dielectric function measurements. In particular, we present the results for a gadolinium sample in the visible and ultraviolet spectral ranges. We compare our experimental results obtained by both methods.
Źródło:: Acta Physicae Superficierum; 1990, 1
0867-2997
Pojawia się w:: Acta Physicae Superficierum
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Muchówki Chironomidae głównym ogniwem w sieciach troficznych wód słodkich
Chironomid larvae as the main element in energy flow through freshwater ecosystems
Autorzy:: Grzybkowska, Maria
Polański, Krzysztof
Grzybkowski, Wiktor
Dukowska, Małgorzata
Powiązania:: https://bibliotekanauki.pl/articles/1196828.pdf
Data publikacji:: 2009
Wydawca:: Polskie Towarzystwo Przyrodników im. Kopernika
Opis:: Circulation of energy much depends on biological transformations of organic matter, of both allochthonous and autochthonous origin. Microorganisms (bacteria and fungi) and macroinvertebrates exploiting available local environmental resources play an especially important role in this flow. Because among macroinvertebrates, chironomids (Chironomidae, Diptera) dominate in freshwater ecosystems these insects are very important. Energy flow is affected to the highest degree by detritivores feeding on small particles of organic matter: either suspended in water (filtering collectors, such as Odontomesa fulva and Micropsectra) or occurring on/in river bottom (gathering collectors or deposit feeders, Prodiamesa olivacea, Glyptotendipes). In turn periphyton feeders, such as Cricotopus, scrape periphyton from surfaces of various substrate objects, including epiphyton developing on vascular plants. Predators, e.g. Conchapelopia melanops and Cryptochironomus, constitute from 10 to 20% of total benthos density along the longitudinal river profile. Each of this group shows a morphological adaptation to the kind of food resources used. Photos of chironomidae head capsules were made by scanning electron microscope Vega 5135 Tescan in low vacuum operation's mod.
Źródło:: Kosmos; 2009, 58, 1-2; 153-160
0023-4249
Pojawia się w:: Kosmos
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Badania meteorytu NWA 4560 za pomocą analitycznej mikroskopii elektronowej
Investigations of NWA 4560 meteorite by analytical electron microscopy
Autorzy:: Szurgot, Marian
Polański, Krzysztof
Powiązania:: https://bibliotekanauki.pl/articles/1032968.pdf
Data publikacji:: 2013
Wydawca:: Polskie Towarzystwo Meteorytowe
Tematy:: Analytical electron microscopy
NWA 4560
extraterrestrial matter
meteorites
thin sections
Opis:: Ordinary chondrite NWA 4560 was investigated by analytical electron microscopy. Elemental composition and mineral composition have been analyzed. Kamacite, troilite, olivine, orthopyroxene, clinopyroxene, and oligoclase have been identified, and mean composition of meteorite, and composition of olivine, pyroxenes and oligoclase determined. Olivine Fa30–38, orthopyroxene bronzite Fs9–32Wo2–4, clinopyroxenes (pigeonite Fs13–17Wo5–7, as well as augite Fs17Wo22), and oligoclase Ab80An20 have been found in the meteorite. Olivine and pyroxene are common. POP, PO, BO, PP, RP, C, POP, GP and GOP chondrules have been identified. Elemental and mineral composition, atomic ratios and microstructure indicate that NWA 4560 is a type 3.2 ordinary chondrite which belongs to LL group.
Źródło:: Acta Societatis Metheoriticae Polonorum; 2013, 4; 90-107
2080-5497
Pojawia się w:: Acta Societatis Metheoriticae Polonorum
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Wyniki badań składu pierwiastkowego i mineralnego eukrytu NWA 4039 za pomocą analitycznej mikroskopii elektronowej
Results of investigation of elemental and mineral composition of NWA 4039 eucrite by analytical electron microscopy
Autorzy:: Szurgot, Marian
Polański, Krzysztof
Powiązania:: https://bibliotekanauki.pl/articles/1032944.pdf
Data publikacji:: 2012
Wydawca:: Polskie Towarzystwo Meteorytowe
Tematy:: HED meteorites
analytical electron microscopy
extraterrestrial matter
meteorites
Opis:: New NWA 4039 eucrite found in 2005 in Morocco was investigated by scanning electron microscopy. Elemental composition and mineral composition have been analyzed. The composition of feldspars and plagioclases has been determined, and the presence of ilmenite, chromite, troilite and silica confirmed. It was established that the mean elemental composition of NWA 4039 and atomic and molar ratios: Fe/Mn = 31, Na/Al = 0.045, Ca/Al = 0.66 and Mg/Mg+Fe = 31 are typical of eucrites, and two main meteorite minerals have the mean composition: pyroxene En30Fs66Wo4 and plagioclase feldspar An91Ab9. Presence of clinopyroxene pigeonite En37Fs55Wo8 and plagioclase An90Ab10 and An92Ab8 has been revealed. Mean chemical composition, as well as TiO2 content (0.59 wt%) vs. FeO/MgO ratio (4.11) indicate that NWA 4039 is a non cumulate, basaltic eucrite.
Źródło:: Acta Societatis Metheoriticae Polonorum; 2012, 3; 126-139
2080-5497
Pojawia się w:: Acta Societatis Metheoriticae Polonorum
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Badanie składu pierwiastkowego i mineralnego chondrytu węglistego NWA 4967 za pomocą analitycznej mikroskopii elektronowej
Investigation of Elemental and Mineral Composition of NWA 4967 Carbonaceous Chondrite by Analytical Electron Microscopy
Autorzy:: Szurgot, Marian
Polański, Krzysztof
Kosiński, Janusz W.
Powiązania:: https://bibliotekanauki.pl/articles/1032790.pdf
Data publikacji:: 2011
Wydawca:: Polskie Towarzystwo Meteorytowe
Tematy:: analytical electron microscopy
carbonaceous chondrites
extraterrestrial matter
meteorites
Opis:: New NWA 4967 carbonaceous chondrite found in 2007 was investigated by scanning electron microscopy. Elemental composition, mineral composition and microstructure have been analyzed. The composition and distribution of olivines have been determined, and kamacite, taenite, troilite, spinel and melilite identified.
Źródło:: Acta Societatis Metheoriticae Polonorum; 2011, 2; 147-157
2080-5497
Pojawia się w:: Acta Societatis Metheoriticae Polonorum
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Panel of serum metabolites discriminates cancer patients and healthy participants of lung cancer screening - a pilot study
Autorzy:: Roś-Mazurczyk, Małgorzata
Wojakowska, Anna
Marczak, Łukasz
Polański, Krzysztof
Pietrowska, Monika
Polanska, Joanna
Dziadziuszko, Rafał
Jassem, Jacek
Rzyman, Witold
Widlak, Piotr
Powiązania:: https://bibliotekanauki.pl/articles/1038611.pdf
Data publikacji:: 2017
Wydawca:: Polskie Towarzystwo Biochemiczne
Tematy:: early detection
lung cancer screening
metabolomics
serum biomarkers
Opis:: Introduction. Blood biomarkers may support early diagnosis of lung cancer by enabling pre-selection of candidates for computed tomography screening or discrimination between benign and malignant screening-detected nodules. We aimed to identify features of serum metabolome distinguishing individuals with early-detected lung cancer from healthy participants of the lung cancer screening program. Methods. Blood samples were collected in the course of a low-dose computed tomography screening program performed in the Gdansk district (Northern Poland). The analysis included 31 patients with screening-detected lung cancer and the pair-matched group of 92 healthy controls. The gas chromatography coupled to mass spectrometry (GC/MS) approach was used to identify and quantify small metabolites present in serum. Results. There were several metabolites detected in the sera whose abundances discriminated patients with lung cancer from controls. Majority of the differentiating components were downregulated in cancer samples, including amino acids, carboxylic acids and tocopherols, whereas benzaldehyde was the only compound significantly upregulated. A classifier including nine serum metabolites allowed separation of cancer and control samples with 100% sensitivity and 95% specificity. Conclusions. Signature of serum metabolites discriminating between cancer patients and healthy participants of the early lung cancer screening program was identified using a GC/MS metabolomics approach. This signature, though not validated in an independent dataset, deserves further investigation in a larger cohort study.
Źródło:: Acta Biochimica Polonica; 2017, 64, 3; 513-518
0001-527X
Pojawia się w:: Acta Biochimica Polonica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Ionizing radiation affects profile of serum metabolites: increased level of 3-hydroxybutyric acid in serum of cancer patients treated with radiotherapy
Autorzy:: Roś-Mazurczyk, Małgorzata
Wojakowska, Anna
Marczak, Łukasz
Polański, Krzysztof
Pietrowska, Monika
Jelonek, Karol
Domińczyk, Iwona
Hajduk, Agata
Rutkowski, Tomasz
Składowski, Krzysztof
Widłak, Piotr
Powiązania:: https://bibliotekanauki.pl/articles/1038706.pdf
Data publikacji:: 2017
Wydawca:: Polskie Towarzystwo Biochemiczne
Tematy:: head and neck cancer
mass spectrometry
metabolomics
radiation response
serum metabolome
Opis:: Radiotherapy causes molecular changes observed at the level of body fluids, which are potential biomarker candidates for assessment of radiation exposure. Here we analyzed radiotherapy-induced changes in a profile of small metabolites detected in sera of head and neck cancer patients using the gas chromatography coupled with mass spectrometry approach. There were about 20 compounds, including carboxylic acids, sugars, amines and amino acids, whose levels significantly differed between pre-treatment and post-treatment samples. Among metabolites upregulated by radiotherapy there was 3-hydroxybutyric acid, whose level increased about three times in post-treatment samples. Moreover, compounds affected by irradiation were associated with several metabolic pathways, including protein biosynthesis and amino acid metabolism.
Źródło:: Acta Biochimica Polonica; 2017, 64, 1; 189-193
0001-527X
Pojawia się w:: Acta Biochimica Polonica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Identification of serum proteome components associated with progression of non-small cell lung cancer
Autorzy:: Pietrowska, Monika
Jelonek, Karol
Michalak, Malwina
Roś, Małgorzata
Rodziewicz, Paweł
Chmielewska, Klaudia
Polański, Krzysztof
Polańska, Joanna
Gdowicz-Kłosok, Agnieszka
Giglok, Monika
Suwiński, Rafał
Tarnawski, Rafał
Dziadziuszko, Rafał
Rzyman, Witold
Widłak, Piotr
Powiązania:: https://bibliotekanauki.pl/articles/1039297.pdf
Data publikacji:: 2014
Wydawca:: Polskie Towarzystwo Biochemiczne
Tematy:: cancer staging
early detection
lung cancer
proteomics
serum biomarkers
Opis:: The aim of the present study was to perform comparative analysis of serum from patients with different stages of non-small cell lung cancer (NSCLC) using the three complementary proteomic approaches to identify proteome components associated with the progression of cancer. Serum samples were collected before any treatment from 200 patients with NSCLC, including 103 early stage, 64 locally advanced and 33 metastatic cancer samples, and from 200 donors without malignancy. The low-molecular-weight fraction of serum proteome was MALDI-profiled in all samples. Serum proteins were characterized using 2D-PAGE and LC-MS/MS approaches in a representative group of 30 donors. Several significant differences were detected between serum samples collected from patients with early stage cancer and patients with locally advanced cancer, as well as between patients with metastatic cancer and patients with local disease. Of note, serum components discriminating samples from early stage cancer and healthy persons were also detected. In general, about 70 differentiating serum proteins were identified, including inflammatory and acute phase proteins already reported to be associated with the progression of lung cancer (serum amyloid A or haptoglobin). Several differentiating proteins, including apolipoprotein H or apolipoprotein A1, were not previously associated with NSCLC. No significant differences in patterns of serum proteome components were detected between patients with adenocarcinoma and squamous cell carcinoma. In conclusion, we identified the biomarker candidates with potential importance for molecular proteomic staging of NSCLC. Additionally, several serum proteome components revealed their potential applicability in early detection of the lung cancer.
Źródło:: Acta Biochimica Polonica; 2014, 61, 2; 325-331
0001-527X
Pojawia się w:: Acta Biochimica Polonica
Dostawca treści:: Biblioteka Nauki

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