Ocena możliwości wykorzystania desorpcji termicznej do wyznaczania charakteru nasyceń w profilu odwiertu

Matyasik, I.; Zapała, Marek; Kierat, Maria; Kania, Małgorzata; Bieleń, W.; Spunda, Karol

doi:10.18668/ng.2019.12.01

Cited by 2 publications

(3 citation statements)

References 20 publications

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“…They are a diverse group of lipid molecules synthesized by bacteria, fungi, plants, invertebrates, and animals [ 21 , 22 , 23 , 24 , 25 , 26 ]. These aromatic steroids have been identified in various sources, including geological samples, marine sediments, and oil [ 27 , 28 , 29 , 30 , 31 ].…”

Section: Steroids Bearing Aromatic Ring(s)mentioning

confidence: 99%

“…A comprehensive analysis of the literature reveals that the most prevalent subgroup among natural lipids is mono-aromatic steroids and triterpenoids, with an aromatic ring in either position A (approximately 200 metabolites) or position B (around 20 steroids) [ 32 ]. Additionally, a small number of di-aromatic steroids have been identified in living organisms, geological samples, marine sediments, and oil, while only a few tri-aromatic steroid hydrocarbons have been found in living organisms, marine sediments, and oil [ 28 , 29 , 30 , 33 , 34 ].…”

Section: Steroids Bearing Aromatic Ring(s)mentioning

confidence: 99%

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Biological Activity and Structural Diversity of Steroids Containing Aromatic Rings, Phosphate Groups, or Halogen Atoms

Dembitsky

2023

Molecules

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This review delves into the investigation of the biological activity and structural diversity of steroids and related isoprenoid lipids. The study encompasses various natural compounds, such as steroids with aromatic ring(s), steroid phosphate esters derived from marine invertebrates, and steroids incorporating halogen atoms (I, Br, or Cl). These compounds are either produced by fungi or fungal endophytes or found in extracts of plants, algae, or marine invertebrates. To assess the biological activity of these natural compounds, an extensive examination of referenced literature sources was conducted. The evaluation encompassed in vivo and in vitro studies, as well as the utilization of the QSAR method. Numerous compounds exhibited notable properties such as strong anti-inflammatory, anti-neoplastic, anti-proliferative, anti-hypercholesterolemic, anti-Parkinsonian, diuretic, anti-eczematic, anti-psoriatic, and various other activities. Throughout the review, 3D graphs illustrating the activity of individual steroids are presented alongside images of selected terrestrial or marine organisms. Additionally, the review provides explanations for specific types of biological activity associated with these compounds. The data presented in this review hold scientific interest for academic science as well as practical implications in the fields of pharmacology and practical medicine. The analysis of the biological activity and structural diversity of steroids and related isoprenoid lipids provides valuable insights that can contribute to advancements in both theoretical understanding and applied research.

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Section: Steroids Bearing Aromatic Ring(s)mentioning

confidence: 99%

Section: Steroids Bearing Aromatic Ring(s)mentioning

confidence: 99%

Biological Activity and Structural Diversity of Steroids Containing Aromatic Rings, Phosphate Groups, or Halogen Atoms

Dembitsky

2023

Molecules

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“…Jako gazu nośnego użyto helu o stałej prędkości przepływu -1,98 ml/min. Zastosowano gradient temperaturowy kolumny od 30°C (utrzymywane przez 5 min) do 360°C (utrzymywane przez 2 min) z narostem 10°C/min, temperaturę dozownika 250°C, split 10 : 1 oraz temperaturę detektora FID wynoszącą 360°C (Kania i Janiga, 2015;Labus et al, 2019;Matyasik et al, 2019).…”

Section: Metodyka Oznaczeń Py-gc-fidunclassified

Ocena wpływu przygotowania próbek na uzyskiwane wyniki analiz pirolitycznych

Janiga¹,

Kania²,

Wciślak³

et al. 2021

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The aim of the work, the results of which are presented in the article, was to evaluate the influence of the method of sample preparation on the results of pyrolytic analyses: RockEval, Py-GC-FID (gas chromatography with FID detector) and Py-GC-IRMS (isotope mass spectrometry with gas chromatography). Mortars and ball mills are most often used to grind the samples. Three rock samples with a higher organic carbon content (shales) and five with a lower organic carbon content (including two samples of dolomites and three of anhydrites) were prepared. The rocks were homogenized and divided into three parts. Each part was ground: by hand in a mortar, in a ball mill for 5 minutes, and in a ball mill for 15 minutes. A total of 24 RockEval analyses, 48 Py-GC-FID analyses (two pyrolysis temperatures corresponding to RockEval pyrolysis conditions) and 24 Py-GC-IRMS analyses were performed. The grinding of the samples for the RockEval analyses is insignificant. The differences in the results seem to indicate the influence of the analysis error and the nature of the sample. For the Py-GC-FID methodology, the influence of milling on the results of desorption carried out at the temperature of 300ºC for most of the tested samples can be considered insignificant and negligible. At the temperature of 500ºC, various types of samples show some correlations, but they are insufficient to reject one of the methods of sample preparation. Therefore, it is important to analyze the results comprehensively, taking into account both the group composition and the distribution of pyrolysis products. In the case of the isotopic composition analyses (Py-GC-IRMS), also no differences in δ13C values related to different types of grinding samples can be found. Summarizing, all the results show a negligible influence of the method of grinding the samples on the results of pyrolysis analyses. Nevertheless, it is important that only one method of sample preparation is used for a separate sample series.

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Ocena możliwości wykorzystania desorpcji termicznej do wyznaczania charakteru nasyceń w profilu odwiertu

Cited by 2 publications

References 20 publications

Biological Activity and Structural Diversity of Steroids Containing Aromatic Rings, Phosphate Groups, or Halogen Atoms

Biological Activity and Structural Diversity of Steroids Containing Aromatic Rings, Phosphate Groups, or Halogen Atoms

Ocena wpływu przygotowania próbek na uzyskiwane wyniki analiz pirolitycznych

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