Search results

Filters

  • Journals
  • Autorzy
  • Słowa kluczowe
  • Data
  • Typ

Search results

Number of results: 5
items per page: 25 50 75
Sort by:
Download PDF Download RIS Download Bibtex

Abstract

Methane is an atmospheric trace gas, which is estimated to contribute about 20% to global warming. Coal mining used to be regarded as attributing considerably to the anthropogenic emissions of that potent greenhouse gas. Recently discovered methanotrophic abilities of coalbed rocks brought a new argument to the discussion about the environmental impact of the mining industry. In the present work, we determined the methanotrophic activity and maximum capacity (Vmaxl of methane oxidation originating from rocks surrounding seam 385/2 of the "Bogdanka" coal mine. Methane oxidation rates ranged from 0.23lμM CH4 g "day ·1 in the rock from the middle of the seam to 0.619 μM CH4 g "day ·1 in the bottom rock (4.4 m depth). Methanotrophic activity and Ymax increased with the distance to the coal body and with decreasing TOC content. Initial and terminal redox conditions (Eh>320 mV, pH 7.60-8.62) confirmed the oxic character of the methane oxidation process.
Go to article

Authors and Affiliations

Zofia Stępniewska
Anna Pytlak
Download PDF Download RIS Download Bibtex

Abstract

An enzyme-assisted modified steam distillation process was adopted to extract turmeric oil from Curcuma longa L. rhizomes. The diastase, xylose, cellulase, pectinase, and lipase enzymes were used for the pre-treatment of fresh turmeric rhizome to obtain a higher yield by rapturing biological cells. The quantitative and qualitative analysis of turmeric oil was performed by GC–MS. The various influencing parameters for the extraction of turmeric oil such as an enzyme, incubation/pre-treatment time, distillation time have been studied in the presentwork. The obtained turmeric oil by enzymatic pretreatment process is richer in bioactive/medicinal components than in the other traditional methods. The maximum yield was obtained with cellulase enzyme, which is 25–27% higher than the yield obtained by the traditional hydro distillation process. The detailed qualitative and quantitative analyses are also presented. The present method can be considered energy-efficient, effective, economical, and eco-friendly.
Go to article

Authors and Affiliations

Avinash Chandra
1
Heena Rekhi
2
Dharmender
3
A.K. Gautam
4
R.K. Arya
5

  1. Department of Chemical Engineering, Thapar Institute of Engineering and Technology, Patiala-147004, India
  2. Department of Chemistry, Khalsa College, Patiala, Punjab-147001, India
  3. School of Chemistry and Biochemistry, Thapar Institute of Engineering and Technology, Patiala-147004, India
  4. Department of Chemical Engineering, National Institute of Technology, Hamirpur-177005, India
  5. Department of Chemical Engineering, Dr. B. R. Ambedkar National Institute of Technology, Jalandhar-144011, India
Download PDF Download RIS Download Bibtex

Abstract

Numbers of saprophytic bacteria were determined by the plate count in samples obtained at 45 oceanographic stations, from six standard depths between 10 and 150 m. Depending on the sampling place, the numbers of bacteria fluctuated between 0.8 x 102 to 4.3 x l 04 x 1-1 and 1.2 x l07 to 1.3 x 108, in a water column under 1 m2 sea surface. Most of saprophytic bacteria were observed at stations located south and south-east of the King George Island, and also north and north-west of the Anvers Island. Fewer numbers were found in areas of large krill swarms in the Bransfield Strait, between 58°30' and 62°30' W, and in the north-western part of the research area, far away from the South Shetland Islands.

Go to article

Authors and Affiliations

Marek K. Zdanowski
Download PDF Download RIS Download Bibtex

Bibliography

1. Ajdukiewicz K. (1934/2016), Logistyczny antyirracjonalizm w Polsce, w: A. Brożek, A. Chybińska (red.), Fenomen Szkoły Lwowsko‑Warszawskiej, Lublin: Academicon.
2. Ajdukiewicz K. (1937/2006), Problemat transcedentalnego idealizmu w sformułowaniu semantycznym, w: tenże, Język i poznanie, t. I, Warszawa: Wydawnictwo Naukowe PWN.
3. Ajdukiewicz K. (1955/1965), O potrzebie usługowego kursu logiki w programach studiów uniwersyteckich, w: tenże, Język i poznanie, t. II, Warszawa: Wydawnictwo Naukowe PWN.
4. Beaney M. (red.) (2013), The Oxford Handbook of the History of Analytic Philosophy, Oxford: Oxford University Press.
5. Cappelen H., Gendler T., Hawthorne J. (red.) (2016), Oxford Handbook of Philosophical Methodology, Oxford: Oxford University Press.
6. Carnap R. (1950/1962), The Logical Foundations of Probability, Chicago: The University of Chicago Press.
7. Daly Ch. (2010), An Introduction to Philosophical Methods, Peterborough: Broadview.
8. Daly Ch. (red.) (2015), The Palgrave Handbook of Philosophical Methods, Basingstone: Palgrave Macmillan.
9. D’Oro G., Overgaard S. (red.) (2017), The Cambridge Companion to Philosophical Methodology, Cambridge: Cambridge University Press.
10. Joll M. (2017), Metaphilosophy, w: J. Fieser, B. Dowden (red.), Internet Encyclopedia of Philosophy, https://iep.utm.edu/con‑meta/ [04.10.2020].
11. Kleszcz R. (2015), Metoda i wartości. Metafilozofia Kazimierza Twardowskiego, Warszawa: Semper.
12. Overgaard S., Gilbert P., Burwood S. (red.) (2013), An Introduction to Metaphilosophy, Cambridge: Cambridge University Press.
13. Schwarz P. (2012), A Brief History of Analytic Philosophy: From Russell to Rawls, Oxford: Wiley‑Blackwell.
14. Soames S. (2003), Philosophical Analysis in the Twentieth Century, vol. I: The Dawn of Analysis, vol. 2: The Age of Meaning, Princeton: Princeton University Press.
15. Soames S. (2013), The Analytic Tradition in Philosophy, vol. 1: The Funding Giant, Princeton: Princeton University Press.
16. Soames S. (2017), The Analytic Tradition in Philosophy, vol. 2: A New Vision, Princeton: Princeton University Press.
17. Woleński J. (1997), Szkoła Lwowsko‑Warszawska w polemikach, Warszawa: Scholar.
18. Wolniewicz B. (2016), Mój obraz Szkoły lwowsko‑warszawskiej, w: A. Brożek, A. Chybińska (red.), Fenomen Szkoły Lwowsko‑Warszawskiej, Lublin: Academicon.

Go to article

Authors and Affiliations

Artur Kosecki
1
ORCID: ORCID

  1. Uniwersytet Szczeciński, Instytut Filozofii i Kognitywistyki, ul. Krakowska71/79, 71-017 Szczecin

This page uses 'cookies'. Learn more