Wyniki wyszukiwania

1

Some remarks on gas chromatographic challenges in the context of green analytical chemistry

100%

Wardencki W., Namiesnik J.

Polish Journal of Environmental Studies

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2002

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tom 11

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nr 2

As researchers involved in chromatography for 30 years we would like to present three approaches of implementation of principles of green chemistry into gas chromatography

2

Cuisine, chemistry and music; What they have in common?

88%

Rachon J.

Polish Journal of Food and Nutrition Sciences

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2011

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tom 61

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nr Suppl.1

3

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Leon P. Marchlewski 1869-1946

88%

Ostrowski W. S.

Acta Physiologica Polonica

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1987

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tom 38

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nr 2

4

Professor Maciej Wiewiorowski - a man of action and a visionary 1918-2005

88%

Figlerowicz M., Markiewicz W. T., Jaskolski M.

Acta Biochimica Polonica

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2005

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tom 52

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nr 4

5

Changes in the chemistry of medicinal plants due to air pollution affect human health

88%

Zobel A. M., Wierzchowska-Renke K., Glowniak K., Furmanowa M.

Ochrona Środowiska i Zasobów Naturalnych

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1999

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tom 18

6

Jedrzej Sniadecki [1768-1838] Chemist, physiologist, physician

88%

Zydowo M. M.

Polish Journal of Environmental Studies

|

1996

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tom 05

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nr 4

7

Kurt Wuthrich - co-winner of the Nobel Prize in Chemistry, 2002

88%

Jaskolski M., Liberski P. P.

Acta Neurobiologiae Experimentalis

|

2002

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tom 62

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nr 4

8

The IP vs. VDE competition as a key factor determining the stability of the MgBX5 (X = F, CL) compounds

75%

Sikorska C., Skurski P., Jaworski S.

Current Topics in Biophysics. Supplement

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2011

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tom 34

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nr A: Posters

9

Jedrzej Sniadecki 1768-1838

75%

Mietkiewski E.

Acta Physiologica Polonica

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1987

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tom 38

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nr 2

10

Re-inventing the production of adhesive from Cassava starch as a career opportunity in chemistry education

75%

Aliyu B. A., Aliyu K. B.

International Letters of Natural Sciences

|

2014

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tom 13

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nr 1

The present study is aimed at investigating the properties of Cassava starch for the production of adhesives as a career opportunity in chemistry education. Method of starch extraction, characterization and adhesive production for quality assessment was performed. The results showed that adhesives produced with sodium hydroxide as a gelatinization enhancer has a maximum drying time of 8.60 minutes and had a stronger bond. The work concludes that the adhesive produced is of good quality and can lead to re-inventing chemistry education as a career opportunity. However, the Cassava adhesive met the basic requirement for adhesive use and application. At the end recommendations were made, among others increase employment opportunities, also diversify the economic base of farmers and there is need for reorientation and attitudinal change towards entrepreneurial job.

11

Evaluation of chemistry of water running from the catchments Cervik and Mala Roztoka in the Moravian - Silesian Beskids during the flood wave in July 1997

75%

Lochman V., Chlebek A., Jarabac M.

Przegląd Naukowy Wydziału Melioracji i Inżynierii Środowiska

|

1998

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nr 16

12

Report of the Federation of European Chemical Societies [FECS], Division of Chemistry and the Environment, Rome, 10-12 January, 2002

75%

Maciejowska I., Buszewski B.

Polish Journal of Environmental Studies

|

2002

|

tom 11

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nr 4

13

Plants, chemistry and the man and his history - some stories travelling around the world

63%

Bicchi C.

Polish Journal of Food and Nutrition Sciences

|

2011

|

tom 61

|

nr Suppl.1

14

Profesor Jan Dobrzycki - 50 lat w służbie cukrownictwa

63%

Zaorska H.

Gazeta Cukrownicza

|

1988

|

tom 96

|

nr 10

15

Organic compounds in rainfall at Hornsund, SW Spitsbergen: qualitative results

63%

Krawczyk W. E., Skret U.

Polish Polar Research

|

2005

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tom 26

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nr 1

65-76

Research on the chemistry of atmospheric precipitation in the Hornsund region of Svalbard has been extended by analysis of the organic contents. In rainfall samples collected in September 2003, the organics were separated by solid phase extraction (SPE), eluted and analysed on gas chromatograph coupled to a mass selective detector (GC/MS). Rainfall pH was in the range 4.72-5.45, the low values suggesting possible pollution. Concentrations of inorganic ions, expressed as total dissolved salts (TDS), were 5.40-13.18 mg L-1. Non-sea-salt (nss) sulphates were in the range 5-11 µeq L-1. In all samples, long-chain alkanes with chain length up to C36, and their methyl derivatives were detected. Among aromatic compounds biphenyl, dibenzofuran and its methyl derivatives were found. Polycyclic aromatic hydrocarbons (PAHs) were represented by naphthalene, phenanthrene, fluorene, acenaphthene, fluoranthene and pyrene. There were no PAHs with higher numbers of rings. The synoptic meteorological conditions in September 2003 indicate that all organic and inorganic pollutants were of local origin.

16

Dynamics, structure and chemistry of litterfall in headwater riparian forest in the area of Middle Pomerania

63%

Jonczak J., Olejniczak M., Parzych A., Sobisz Z.

Journal of Elementology

|

2016

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tom 21

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nr 2

The following research on plant litterfall mass, dynamics, structure and chemistry was conducted from 2012 to 2014, on a 40- to 86-year-old stand of black alder (Alnus glutinosa) growing in a headwater area of the upper part of the valley of the Kamienna Creek (Middle Pomerania). Litterfall was collected every month with 20 circular traps, dried untill constant weight, divided into fractions, weighed and analyzed. The annual amount of litterfall deposited on soil during the study period ranged from 3482.5 to 4106.9 kg·ha-1, showing a dynamics pattern typical of temperate decidous forests. Leaves constituted the major fraction of litter with share of between 78.0 and 81.6% in its total mass. The contribution (in %) of twigs was 4.9-5.6, flowers 2.8-8.3, fruits 0.2-0.9 and other components 7.6-9.2. The relatively stable environmental conditions of headwater areas and the absence of disrupting factors during the study period were reflected in the low temporal variability of litterfall mass, dynamics and chemical composition of its individual fractions. The average annual pH of litterfall was 4.33-4.57. In general, litter was relatively rich in nitrogen and calcium but poor in phosphorus, potassium and magnesium. The content of Fe, Al and Mn was characteristic for these elements and low when compared to the other macroelements. The low contents of Cu and Zn confirm limited anthropogenic contamination of the investigated ecosystem with these metals. The annual return of the elements to the soil formed a series C>N>Ca>K>Mg>P>Mn>Fe>Al>Zn>Sr>Cu. A relatively large influx to the soil was noticed for nitrogen and calcium. Meanwhile, it was low for potassium, magnesium and phosphorus.

17

Biochemistry in Poznan

63%

Legocki A. B., Pawelkiewicz J.

Acta Biochimica Polonica

|

1989

|

tom 36

|

nr 3-4

18

Opowieść o moim Ojcu – profesorze Edwardzie Bekierze

63%

Bekier J. J.

Analecta. Studia i Materiały z Dziejów Nauki

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2015

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tom 24

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nr 1

19

Influence of acidification of clear lake and the surrounding soil on the chemistry of medicinal plants growing in the lake or under undisturbed old-growth forests

63%

Zobel A. M., Nighswander J. E., Lynch J. E., Wierzchowska-Renke K., Glowniak K., Furmanowa M.

Ochrona Środowiska i Zasobów Naturalnych

|

1999

|

tom 18

20

Tendencies of change in the chemistry of precipitation at three monitoring stations 1996-1999

63%

Walna B., Polkowska Z., Malek S., Medrzycka K., Namiesnik J., Siepak J.

Polish Journal of Environmental Studies

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2003

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tom 12

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nr 4

This study compares the results of three stations differing greatly in geography, and tendencies of change in the chemistry of precipitation (open and throughfall) in the years 1996-1999. The mean annual pH is lower than 5.2, and often drops below 4.6. A distinct decline in the concentrations of sulphate ions at all the stations is observed.

Ograniczanie wyników

Some remarks on gas chromatographic challenges in the context of green analytical chemistry

Cuisine, chemistry and music; What they have in common?

Leon P. Marchlewski 1869-1946

Professor Maciej Wiewiorowski - a man of action and a visionary 1918-2005

Changes in the chemistry of medicinal plants due to air pollution affect human health

Jedrzej Sniadecki [1768-1838] Chemist, physiologist, physician

Kurt Wuthrich - co-winner of the Nobel Prize in Chemistry, 2002

The IP vs. VDE competition as a key factor determining the stability of the MgBX5 (X = F, CL) compounds

Jedrzej Sniadecki 1768-1838

Re-inventing the production of adhesive from Cassava starch as a career opportunity in chemistry education

Evaluation of chemistry of water running from the catchments Cervik and Mala Roztoka in the Moravian - Silesian Beskids during the flood wave in July 1997

Report of the Federation of European Chemical Societies [FECS], Division of Chemistry and the Environment, Rome, 10-12 January, 2002

Plants, chemistry and the man and his history - some stories travelling around the world

Profesor Jan Dobrzycki - 50 lat w służbie cukrownictwa

Organic compounds in rainfall at Hornsund, SW Spitsbergen: qualitative results

Dynamics, structure and chemistry of litterfall in headwater riparian forest in the area of Middle Pomerania

Biochemistry in Poznan

Opowieść o moim Ojcu – profesorze Edwardzie Bekierze

Influence of acidification of clear lake and the surrounding soil on the chemistry of medicinal plants growing in the lake or under undisturbed old-growth forests

Tendencies of change in the chemistry of precipitation at three monitoring stations 1996-1999