Search results

1

Synthesis and structure of ethylene bridged polysilsesquioxanes functionalized with different groups

100%

Barczak M., Dąbrowski A.

|

2009

|

vol. 64

1-10

EN

Amino-, thiol-, urea-, and acethoxy- functionalized polysilsesquioxane xerogels have been obtained by co-condensation of 1,2-bis(triethoxysilyl)ethane with trifunctional silanes. The structural and chemical characterization of the xerogels was done by means of IR, 13C NMR, 29Si NMR spectroscopy, AFM, elemental analysis and nitrogen adsorption measurements. The resulting xerogels have a porous structure (SBET in the range 500-800 m2/g) and a high content of functional groups (2.3-2.7 mmol/g). Majority of these groups are accessible on the surface generating specific adsorption sites. The nature of the functional group introduced by co-condensation substantially influences the porous structure - the resulting samples can be microporous or mesoporous depending on the type of the group used.

2

Temperature Dependence of the Preexponential Factors of the Field Emission Flicker Noise Cross-Correlation Function for W(110)K

100%

Dąbrowski A., Kleint C.

Acta Physica Polonica A

|

1992

|

vol. 81

|

issue 4-5

583-588

EN

In a field emission tube with two probe-holes the cross-correlation functions of current fluctuations from potassium submonolayers on tungsten have been investigated. The measurements were carried out in the temperature range of 290-430 K and with coverages between 0.05 and 0.87. The experimental correlation curves were approximated by a sum of three exponential functions revealing three components with different time constants τ_{i} and amplitudes R. The temperature dependence of the amplitudes R_{2} and R_{3} is discussed in terms of collective flip-flop processes.

3

FT-IR/PAS Studies of Lunar Regolith Samples

81%

Pasieczna-Patkowska S., Dąbrowski A., Robens E., Ryczkowski J.

Acta Physica Polonica A

|

2008

|

vol. 114

|

issue 6A

A-163-A-168

EN

This paper describes investigations of the surface properties of lunar regolith powder samples from the Apollo 11, 12, and 16 missions, respectively. For this part of studies conducted at the Faculty of Chemistry, Maria Curie-Skłodowska University a Fourier transform infrared photoacoustic spectroscopy was applied.

4

Energy & climate

81%

Robens E., El Nokraschy H., Dąbrowski A.

|

2008

|

vol. 63

94-110

EN

Based on published reports a short survey is presented on climatic change. Considering world's increase in temperature the use of fossil energy should be replaced as far and as quickly as possible by alternatives. Actual methods for energy production are discussed. At present, only nuclear power plants and concentrating solar power plants are able to meet the large requirements. Regarding the limited resources of nuclear fuel, costs and problems of nuclear techniques urgently solar techniques should be developed for an extended application.

5

Biometric speech signal processing in a system with digital signal processor

81%

Marciniak T., Weychan R., Stankiewicz A., Dąbrowski A.

|

2014

|

issue 3

6

Aspects of Microsoft Kinect sensor application to servomotor control

81%

Dąbrowski A., Parzych M., Cetnarowicz D.

|

2014

|

issue 3

7

The novel effect of hCG administration on luteal function maintenance during the estrous cycle/pregnancy and early embryo development in the pig

62%

Bołzan E., Andronowska A., Bodek G., Morawska-Pucińska E., Krawczyński K., Dąbrowski A., Zięcik A. J.

Polish Journal of Veterinary Sciences

|

2013

|

issue 2

8

Denoising methods for improving automatic segmentation in OCT images of human eye

62%

Stankiewicz A., Marciniak T., Dąbrowski A., Stopa M., Rakowicz P., Marciniak E.

|

2017

|

issue 1

9

Investigation of surface properties of lunar regolith - Part IV

37%

Robens E., Dąbrowski A., Mendyk E., Goworek J., Skrzypiec K., Drewniak M., Dumańska-Słowik M., Gac W., Dobrowolski R., Pasieczna-Patkowska S., Huber M., Iwan M., Kurzydłowski K., Płociński T., Ryczkowski J., Rzączyńska Z., Sobczak J.

|

2008

|

vol. 63

144-168

EN

We investigated three lunar regolith powder samples from the Apollo missions. Apollo 11 and Apollo 12 samples come from lunar maria and Apollo 16 sample from a highland region. In the present paper we summarise in brief results of measurements using photoelectron spectroscopy (XPS), micro-Raman spectroscopy (RM), x-ray diffraction (XRD), x-ray fluorescence spectroscopy (XRF), temperature programmed reduction and oxidation (TPRO), thermogravimetry (TG), differential thermal analysis (DTA) and nitrogen adsorption. Parts of samples are visualised by means of scanning electron microscopy (SEM/EDX) and atomic force microscopy (AFM).

Refine search results

Synthesis and structure of ethylene bridged polysilsesquioxanes functionalized with different groups

Temperature Dependence of the Preexponential Factors of the Field Emission Flicker Noise Cross-Correlation Function for W(110)K

FT-IR/PAS Studies of Lunar Regolith Samples

Energy & climate

Biometric speech signal processing in a system with digital signal processor

Aspects of Microsoft Kinect sensor application to servomotor control

The novel effect of hCG administration on luteal function maintenance during the estrous cycle/pregnancy and early embryo development in the pig

Denoising methods for improving automatic segmentation in OCT images of human eye

Investigation of surface properties of lunar regolith - Part IV