skip to main content
Guest
My Research
My Account
Sign out
Sign in
This feature requires javascript
Library Search
Find Databases
Browse Search
E-Journals A-Z
E-Books A-Z
Citation Linker
Help
Language:
English
Vietnamese
This feature required javascript
This feature requires javascript
Primo Search
All Library Resources
All
Course Materials
Course Materials
Search For:
Clear Search Box
Search in:
All Library Resources
Or hit Enter to replace search target
Or select another collection:
Search in:
All Library Resources
Search in:
Print Resources
Search in:
Digital Resources
Search in:
Online E-Resources
Advanced Search
Browse Search
This feature requires javascript
Search Limited to:
Search Limited to:
Resource type
criteria input
All items
Books
Articles
Images
Audio Visual
Maps
Graduate theses
Show Results with:
criteria input
that contain my query words
with my exact phrase
starts with
Show Results with:
Search type Index
criteria input
anywhere in the record
in the title
as author/creator
in subject
Full Text
ISBN
ISSN
TOC
Keyword
Field
Show Results with:
in the title
Show Results with:
anywhere in the record
in the title
as author/creator
in subject
Full Text
ISBN
ISSN
TOC
Keyword
Field
This feature requires javascript
Ağartma sırasında kraft selülozunda görülen bazı kimyasal ve optik değişiklikler
İstanbul Üniversitesi Orman Fakültesi Dergisi. Seri A, 1999, Vol.49 (2), p.133-143
ISSN: 0535-8418
Full text available
Citations
Cited by
View Online
Details
Recommendations
Reviews
Times Cited
External Links
This feature requires javascript
Actions
Add to My Research
Remove from My Research
E-mail
Print
Permalink
Citation
EasyBib
EndNote
RefWorks
Delicious
Export RIS
Export BibTeX
This feature requires javascript
Title:
Ağartma sırasında kraft selülozunda görülen bazı kimyasal ve optik değişiklikler
Author:
ATİK, Celil
;
BALABAN, Mualla
Subjects:
ağartma
;
bleaching
;
Chemical and Biological Processing of Wood
;
chemical properties
;
kağıt hamuru üretimi
;
kimyasal özellikler
;
odun hamuru
;
odun ürünleri
;
Odunun Kimyasal ve Biyolojik İşlenmesi
;
optical properties
;
optik özellikler
;
pulping
;
wood products
;
wood pulp
Is Part Of:
İstanbul Üniversitesi Orman Fakültesi Dergisi. Seri A, 1999, Vol.49 (2), p.133-143
Description:
Esmer kraft selülozunun ağartılması sırasında meydana gelen kimyasal ve optik değişiklikler son ürün olan kağıdın kalitesi üzerine önemli bir etki yapmaktadır. Araştırmada, esmer selülozdan başlayarak her bîr ağartma basamağından alınan hamurlarda, selüloz makromolekülündeki parçalanmaları gösteren polimerizasyon derecesi tayini, ayrıca hamurun rengi ve kalitesi üzerine büyük etkisi olan lignin, kalıntı ve asitte çözünür lignin olarak belirlenmiştir. Bu verilerden, esmer selülozdan itibaren bütün ağartma basamaklarında hamurların DP değerlerindeki önemli azalmaların yanı sıra kalıntı ve çözünür lignin değerlerinde de belirgin düşüşler görülmüştür. Selülozun optik niteliklerini iyileştirmeye de yarayan ağartma işleminde, basamakların her birinden alınan hamurlarda parlaklık, beyazlık, k/s, opaklık ve renk gibi optik özelikler tespit edilerek ağartmanın ne derece gerçekleştiği saptanmıştır. The quality of paper is considered to be affected by the variations of chemical and optical properties of unbleached and bleached kraft pulps obtained from the bleaching stages. In these samples, first the degree of polymerization was determined to follow the degradation of polysaccharides during the bleaching. Then, the lignin contents as klason and acid soluble lignin were estimated in the pulps. DP values of cellulose in the samples showed that the unbleached pulp was degraded during the bleaching stages and therefore, the cellulose in the unbleached pulp had the highest degree of polymerization. As expected, the bleaching resulted in the decrease of residual and soluble lignin in pulps after each stage. Additionally, the pulps obtained from each bleaching stage were studied with regard to their optical properties such as brightness, whiteness, k/s value, opacity and colour.
Publisher:
İstanbul Üniversitesi
Language:
Turkish
Identifier:
ISSN: 0535-8418
Source:
DOAJ Directory of Open Access Journals
Alma/SFX Local Collection
This feature requires javascript
This feature requires javascript
Back to results list
This feature requires javascript
This feature requires javascript
Searching Remote Databases, Please Wait
Searching for
in
scope:(TDTS),scope:(SFX),scope:(TDT),scope:(SEN),primo_central_multiple_fe
Show me what you have so far
This feature requires javascript
This feature requires javascript