Chemical modification of poly(N-vinylcarbazole) by chloromethylation reaction

Chloromethylation reaction of poly(N-vinylcarbazole) was studied. The effect of the chloromethylating agent, catalyst, temperature, and reaction time on the course of chloromethylation reaction was investigated. The optimum conditions for introducing one chloromethyl group per one monomer unit were found. Thermal studies of chloromethylated poly(N-vinylcarbazole) were carried out.     

Dynamic Light Scattering and NMR Studies of Napin

We analyze the structure of napin (BngNAP1), a storage protein (m.w. 14.5 kDa) from Brassica napus. On the basis of the results of ¹H NMR spectroscopy and dynamic light scattering (DLS) studies, the overall shape and secondary structure of the molecule are estimated.     

TEM and X-ray investigations of defect structure of PbSnTe crystal

The Pb_0.8Sn_0.2Te single crystal grown by the Bridgman technique was examined by X-ray and TEM methods. The X-ray reflection topography revealed that the PbSnTe crystal consisted of monocrystallinic blocks with linear dimensions of 1–5 mm separated by low angle boundaries of tilt-twist character. “As grown” defects observed by TEM method have been identified as single perfect dislocations and dislocation pairs. A mean density of dislocations inside the crystal blocks was no more than 10³ cm⁻². Except “as grown” defects rows of mobile dislocations were observed. All of dislocations lines were characterized by the same type of Burgers vector, i.e. b = 1/2a〈110〉.     

TEM studies of medium-doses Kr+-implanted silicon

〈100〉 silicon wafers implanted with 300 ke V Kr⁺ ions to the following 5 × 10¹³, 1 × 10¹⁴ and 5 × 10¹⁴ cm⁻² doses were investigated by means of conventional and high voltage transmission electron microscopes. Planar-view technique was applied to characterize primary damage and to determine the geometry and the nature of secondary defects left after the furnace annealing. It is concluded that implantation to the lowest and highest doses, respectively, leads to incomplete and complete amorphicity of entire bombarded region, whereas the intermediate dose forms a burried amorphous layer. Small interstitial Frank dislocation loops on {111} planes are the predominant secondary defects for the range of doses. Occurrence of additional rod-like defects is related to the regions of discontinuous initial amorphicity.     

Refinement Equations and Feller Operators

Results on the existence and non-existence of nontrivial \mathbb L¹{\mathbb L^1}-solutions of the refinement equation

Means of iterates

Aequationes mathematicae - We determine continuous bijections f, acting on a real interval into itself, whose k-fold iterate is the quasi-arithmetic mean of all its subsequent iterates from $$f^0$$...     

Karol Baron: a little bit about him on his 70th birthday

Aequationes mathematicae -     

Linear functional equations and their solutions in generalized Orlicz spaces

Aequationes mathematicae - Assume that $$\Omega \subset \mathbb {R}^k$$ is an open set, V is a real separable Banach space and $$f_1,\ldots ,f_N :\Omega \rightarrow \Omega $$ , $$g_1,\ldots ,...     

Dilation equations and Markov operators

Using the theory of Markov operators, we give a new proof of the known fact saying that for every positive integers N and k>1, and for every nonnegative reals c₀,…,cN satisfying the first sum rule the dilation equation