Počet záznamov: 1
Chemická charakteristika papierov z historických kníh
SYS 0077466 LBL 00000naa^^22^^^^^^^^450 005 20190401104727.9 100 $a 20150409d m y0sloc0103 ba 101 0-
$a slo $d eng 102 $a SK 200 1-
$a Chemická charakteristika papierov z historických kníh $d Chemical characterisation of papers from historical books $f Iveta Čabalová, František Kačík 215 $c Tab. 320 $a Lit. 330 $a Paper is very important carrier of written information and insulation material in electric power transformers. Its deterioration during natural aging is influenced by various factors, e.g. composition of material itself, time, temperature, humidity, quality of the environment, etc. Study of the degradation processes is very important for development of paper conservation techniques. The aim of this research was to study the changes of saccharides (glucose, xylose, galactose, arabinose and mannose), lignin, ash content and pH value of historical paper documents from the 18th, 19th, 20th and 21st century. Saccharides, ash and lignin were analysed by following the National Renewable Energy Laboratory (NREL) procedures, pH and grammage according to Slovak Technical Standards (STN). The samples from the 18th, 19th (up to 1859) and 21st century had a pH from slightly acidic to alkaline values, the samples from the second half of the 19th century and from 20th century were more acidic. In older papers was also primarily detected the most durable saccharide of D-glucose. 330 $a Cieľom príspevku je charakterizovať obsah polysacharidov, lignínu, popola vo vzorkách papiera z historických kníh a zistiť kyslosť týchto dokumentov. 463 -1
$1 001 sldk_un_cat*0077448 $1 011 $a 1336-3824 $1 200 1 $a Acta Facultatis Xylologiae Zvolen $e vedecký časopis Drevárskej fakulty $v Roč. 57, č. 1 (2015), s. 37-42 $1 210 $a Zvolen $c Technická univerzita vo Zvolene $d 2015 610 1-
$9 sldk_un_auth*0020831 $a historické dokumenty $X historical documents 610 1-
$9 sldk_un_auth*h002611 $a papier $X paper 610 1-
$9 sldk_un_auth*h023117 $a chemická charakteristika $X chemical characteristic 610 1-
$9 sldk_un_auth*h019032 $a degradácia $X degradation 610 1-
$9 sldk_un_auth*h012902 $a sacharidy $X saccharides 610 1-
$9 sldk_un_auth*h007595 $a lignín $X lignin 610 1-
$9 sldk_un_auth*h017507 $a popol $X ash 610 1-
$9 sldk_un_auth*h010836 $a pH faktor $X pH factor 675 $a 676 $v 1. stred. $z slo 675 $a 630*864.4 $v 1. stred. $z slo 700 -1
$3 sldk_un_auth*p0051819 $a Čabalová $b Iveta $f 1979- $p TUZDFCHTD $4 070 $T Katedra chémie a chemických technológií 701 -1
$3 sldk_un_auth*p0015985 $a Kačík $b František $f 1958- $p TUZDFCHTD $4 070 $T Katedra chémie a chemických technológií 801 -0
$a SK $b ZV001 $c 20150409 $g AACR2 856 4-
$u https://df.tuzvo.sk/sites/default/files/04-01-15-cabalova-kacik_0.pdf
Počet záznamov: 1