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  • Pectin
Molecular Structure of Galacturonic acid
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Galacturonic acid is the monobasic acid resulting from oxidation of the primary ... More

Galacturonic acid is the monobasic acid resulting from oxidation of the primary alcohol group of D-galactose to carboxyl. It is widely distributed as a constituent of pectins (compounds with heterogeneous grouping of acidic structural polysaccharides, found in fruit and vegetables), many plant gums, and mucilages (gummy substances obtained from certain plants, which are used as food stabilizers). Gums tend to be used as thickening and bulking agents in pharmaceutics, and they play a less obvious part in most plants. Once swallowed, their actions are no different from those of the mucilages. D-Galacturonic acid prepared from pectin can be used to synthesize vitamin C. Native pectin is a mixture of polysaccharides, with the major component a polymer of -D-galacturonic acid. Pectin has numerous other medical and pharmaceutical uses, for example in combination with plant hemicelluloses and lignin, may be useful dietary constituents in preventing coronary heart disease, diverticular disease, ulcerative colitis, and a variety of other Western diseases. Less

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Subject:
Chemistry
Material Type:
Data
Instructional Material
Interactive
Provider:
Indiana University Molecular Structure Center
Provider Set:
Reciprocal Net: A Distributed Crystallography Network for Researchers, Students, and the General Public
Author:
Common molecules
Obtained courtesy of the Cambridge Structural Database
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Paper making
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In this activity, learners explore the question "What is paper?" Learners discover ... More

In this activity, learners explore the question "What is paper?" Learners discover the processes and materials required to make paper while experimenting with different recycled fibers and tools. Less

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Subject:
Engineering
Manufacturing
Education
Life Science
Chemistry
Physics
Material Type:
Activities and Labs
Instructional Material
Provider:
Exploratorium
Science and Math Informal Learning Educators (SMILE)
Provider Set:
Exploratorium
SMILE Pathway: Science and Math Activities in One Search
Author:
Don Rathjen
Ellen Koivisto
The Exploratorium
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.)310.1( tcejbus ngised enotspac eht dna )150.1 ,140.1 ,130.1( stcejbus ngised aera ... More

.)310.1( tcejbus ngised enotspac eht dna )150.1 ,140.1 ,130.1( stcejbus ngised aera ytlaiceps tneuqesbus eht ni desu si hcihw decudortni si esac ngised egral A .naps efil detcepxe dna ,srotcaf laicos dna cimonoce ,tnemnorivne larutan ,tnemnorivne tliub gnitsixe eht fo noitaredisnoc sa llew sa sehcaorppa lacinhcet snrecnoc ylticilpxe ngised tcejorP .)sdaor dna segdirb ,sgnidliub ,.g.e( seitilicaf tliub no sisahpme na htiw ,sesac ngised lareves sedulcnI .gnireenigne livic ni secitcarp dna seussi ngised sa llew sa ,gnivlos-melborp evitaerc dna ngised gnireenigne fo seuqinhcet dna ,sloot ,yroeht eht ot stneduts secudortnI Less

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