Results 181 to 190 of about 14,122 (209)

Products and Kinetics of Glucomannan Pyrolysis

Industrial & Engineering Chemistry Research, 2013
The pyrolysis of particles of glucomannan, the main component of softwood hemicelluloses, is investigated in a fluidized-bed reactor. A first set of experiments is carried out for temperatures in the range 530-690 K to determine yields and composition of products. The most abundant are char, water, and carbon dioxide.
C. Branca, DI BLASI, COLOMBA, C. Mango, I. Hrablay   +3 more
openaire   +4 more sources

Carboxymethylated glucomannan as paper strengthening agent

Carbohydrate Polymers, 2015
Strength additives play an important role in allowing the papermaking industry to achieve its objectives. In this study, a new kind of paper strengthening agent based on glucomannan was developed by treating it with sodium chloroacetate under alkaline conditions, and the effects on paper properties were evaluated.
Meng, Wang, Weitao, He, Shun, Wang, Xianliang, Song   +3 more
openaire   +2 more sources

The enzymatic synthesis of a glucomannan

Biochemical and Biophysical Research Communications, 1966
Abstract The mannose moiety of GDP- D -mannose- 14 C is transferred by a particulate enzyme from mung bean seedlings into a glucomannan. The product was characterized by isolation of a number of oligosaccharides after treatment of the product with a partially purified β-mannanase. Several of these oligosaccharides contained glucose and mannose in
A D, Elbein, W Z, Hassid
openaire   +2 more sources

An unusual glucomannan from Tornabenia intricata

Phytochemistry, 1992
Mannose-containing polysaccharides of 18 lichen species were prepared via successive alkaline extraction, precipitation with Fehling solution and fractional precipitation with Cetavlon. Products from Fehling and Cetavlon precipitation, the latter at pH 8.5 in the presence of borax, were structurally similar, except with those of Usnea sp., U ...
A Z, Teixeira, M, Iacomini, P A, Gorin
openaire   +2 more sources

Glucomannans of Serissa serissoides stem

Chemistry of Natural Compounds, 2011
One β-D-glucomannan was isolated from Serissa serissoides (DC.) Druce. The average molecular weight of the polysaccharide was established to be 2.9 × 103 Da. The structure of the polysaccharide from S. serissoides (SSP) was investigated by using sugar and methylation analysis, infrared spectroscopy, mass spectrometry, and NMR spectroscopy.
Hanmin Zhao, Min Zhou, Meiyan Huang, Kuiwu Wang, Wanxing Wei   +4 more
openaire   +1 more source

Review of konjac glucomannan

Journal of environmental polymer degradation, 1997
The paper reviews the solution and gelling properties of konjac glucomannan (KGM) and its interactions with other hydrocolloids such as xanthan and carrageenan for food applications. Research activities in the area of KGM processing in environmentally friendly aqueous environments have been discussed for coatings and packaging applications.
Vipul Davé, Stephen P. McCarthy
openaire   +1 more source

FLUIDIZED-BED PYROLYSIS OF GLUCOMANNAN

2013
The pyrolysis of particles of glucomannan, the main component of softwood hemicelluloses, is investigated in a fluidized-bed reactor. A first set of experiments is carried out for temperatures in the range 530-690K to determine yields and composition of products. The most abundant are char, water and carbon dioxide.
C Branca, A Galgano, C Di Blasi
openaire   +7 more sources

Structural analysis of suisen glucomannan

Carbohydrate Research, 1973
Abstract The main component of the mucilage in the bulbs of Suisen ( Narcissus tazetta L., var. chinensis Roem) has been shown to be a glucomannan composed of D -glucose and D -mannose in the ratio of 2:3 and having a relatively low degree of branching.
Koji Kato, Yasuro Kawaguchi, Takashi Mizuno   +2 more
openaire   +1 more source

Sulfation and biological activities of konjac glucomannan

Carbohydrate Polymers, 2013
The sulfation of konjac glucomannan and its anti-HIV and blood anticoagulant activities were investigated. Konjac glucomannan is a polysaccharide occurring naturally in konjac plant tubers and has high molecular weights. Solubility in water is very low, and the aqueous solutions at low concentrations have high viscosity. Before sulfation, hydrolysis by
Surina, Bo, Tegshi, Muschin, Taisei, Kanamoto, Hideki, Nakashima, Takashi, Yoshida   +4 more
openaire   +2 more sources

Structure of Narcissus tazetta Glucomannan

Chemistry of Natural Compounds, 2003
Naturally acetylated glucomannan with MW 31,000 and [α]D20 -29.1° was isolated from bulbs of Narcissus tazetta L. Chemical methods and IR and 13C NMR spectroscopies were used to show that the polysaccharide contains 12.9% O-Ac groups and consists of D-mannose and D-glucose in a 1:5.6 ratio that form a linear polymer through β-1,4-glycoside bonds.
K. S. Zhauynbaeva, M. Kh. Malikova, D. A. Rakhimov   +2 more
openaire   +1 more source