We uncover a method of calculation that proceeds at every step without fixing the gauge or specifying details of the regularisation scheme. Results are obtained by iterated use of integration by parts and gauge invariance identities. Calculations can be performed almost entirely diagrammatically. The method is formulated within the framework of an exact renormalisation group for QED. We demonst...

The linker histones (H1 or H5) which play a key role in the folding of chromatin, are general repressors of gene expression. Nuclei of the mature chicken erythrocytes (and in some mammalian cells) contain both of them. Although the interaction of H5 with DNA is stronger than that of H1, it does not prevent the transcription of some erythroid-specific genes. It has been shown that some modificat...

Aims: Nephrolithiasis and nephrocalcinosis are progressive diseases that can lead to renal impairment. The aim of this analysis was to evaluate aetiological factors, metabolic screening, diagnostic algorithm, treatment, prophylactic measures and follow-up in children with nephrolithiasis and nephrocalcinosis. Patients and methods: Retrospective study of 63 children (36 males, 27 females) with n...

The article presents the results of a comparative evaluation five promising hybrids Chaenomeles japonica (Thunb.) Lindl. ex Spach (2-44-05, 3-27-05, 5-50-03, 1-64-05, 3-17-05), identified according to complex commercially valuable traits (winter hardiness, yield, fruit weight, low thorniness, resistance rot), and Likhtar variety in conditions Belarus. Significant differences have been found ter...

Uma das etapas do tratamento endodôntico é a instrumentação dos canais, utilizando as limas endodônticas. As Limas M (Easy) foram desenvolvidas recentemente visando preparos efetivos e seguros. Este estudo avaliou o poder de corte resistência à fratura após aplicação diferentes protocolos em canais radiculares artificiais. O primeiro protocolo (Grupo 1) instrumentos diâmetro ponta 15 40, com co...