xn 



CONTENTS 



Preparation 



Characters 



Identification . 



Physiological significance . 



Inulin-like substances 



Hemicelluloses .... 



Properties .... 



Constitution .... 



Mannan .... 



Paramannan . 



Carubin or secalane . 



Xylan .... 



Araban .... 



Wood gum 



Galactan 



Mixed galactans 



Amyloid 

 Gums ...... 



Microchemical reactions . 

 Gum-arabic .... 



Reactions 

 Gum-tragacanth 

 Wound gum .... 

 Mucilage .... 



Function 

 Pectic bodies 



Isolation of pectins from the tissues 



Properties 



Microchemical reactions . 



Estimation 



Action of enzymes on pectins 



Origin and constitutional relationship 



Changes taking place on ripening 

 Cellulose ...... 



Classification .... 



Properties ..... 



Solubility .... 



Action of various chemicals on cellulose 



Oxycellulose .... 

 Properties 

 Constitution ..... 

 Microchemical reactions 

 Lignified membranes .... 

 Chemistry of lignin 

 Isolation and constitution of lignin . 

 Estimation ..... 

 Estimation of cellulose in lignified tissues 

 Nature of the union between lignin and cellulose 

 Microchemical reactions . 

 Cutinized membranes 

 Suberized membranes 



Microchemical reactions of suberized and 



membranes . 



Industrial uses of cellulose and cellulose products 



Commercially valuable derivatives of cellulose 



cutinized 



174 



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SECTION IV.— GLUCOSIDES 



Constitution 

 Physiological significance 



Sinigrin 



Coniferin 



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