830 



STARCHES OF MARANTACE^. 



Differentiation of Certain Starches of the Genus Maranta. Continued. 



PoLARiscoPic Properties. Continued. 



Degree of Polarization. Continued. 



M. leucmeura: High, slightly lower than but of same 



variability as in M. arundinacea. 

 M. musaica: High, but not so high as in M. arundinacea, 

 variation greater than in M. arundinacea. 



Polarization with Selenite Quadrants and Colors. 



M. arundinacea: Quadrants clearly defined, clear-cut, 

 sometimes irregular in shape, and usually unequal 

 in size. Colors generally pure. 



M. arundinacea var. No. 1 : Quadrants well defined, irreg- 

 ular in shape, and unequal in size. Colors generally 

 pure. 



M. arundinacea var. No. 2: Quadrants very well defined, 

 irregular in shape, and unequal in size. Colors gen- 

 erally pure. 



M. massangeana: Quadrants clearly defined, clear-cut, 

 commonly slightly irregular in shape and unequal 

 in size. Colors genersilly pure, slightly less pure 

 than in M. arundinacea. 



M. leuconeura: Quadrants distinct, clear-cut, generally 

 regular in shape and unequal in size. Colors 

 generally pure. 



M. musaica: Quadrants generally well defined, fairly 

 clear-cut, usually irregular in shape and vmequal 

 in size. Colors generally pure, more often purer 

 than in M. arundinacea. 



Iodine Reactions. 



Intensity and Colors. 



M. arundinacea: Fairly deep; blue- violet. 



M. arundinacea var. No. 1: Fairly deep, a little deeper 



than in M. arundinacea; blue- violet. 

 M. arundinacea var. No. 2: Fairly deep, the same as in 



M. arundinacea; blue- violet; more blue than in 



M. arundinacea. 

 M. massangeana: Fairly deep, deeper than in M. aruTidi- 



nacea; blue-violet to a reddish-violet. 

 M. leuconeura: Deep, deeper than in M. arundinacea; 



dull blue to a reddish- violet. 

 M. musaica: Fairly deep, less than in M. arundinacea; 



reddish to a blue-violet. 



Staining Reactions. 



With Gentian Violet. 



M. arundinacea: Fair. 



M. arundinacea var. No. 1: Fair, little deeper than in 



M. arundinacea. 

 M. arundinacea var. No. 2: Fair, slightly deeper than in 



M. arundinacea. 

 M. massangeana: Light, lighter than in M. arundinacea. 

 M. leuconeura: Very light, distinctly lighter than in M. 



arundinacea. 

 M. musaica: Light, lighter than in M. arundirmcea. 



With Safranin. 



M. arundinacea: Fairly deep. 



M. arundinacea var. No. 1: Fairly deep, slightly deeper 



than in M. arundinacea. 

 M. arundinacea var. No. 2: Fairly deep, slightly deeper 

 than in M. arundinacea. 

 massangeana: Fair, lighter than in M. arundinacea. 

 . leuameura: Light, distinctly lighter than in M. arun- 

 dinacea. 

 . musaica: Fair, lighter than in M. arundinacea. 



Temperature of Gelatinization. 



, arundinacea: 76 to 78 C, mean 77. 

 M. arundinacea var. No. 1: 71 to 72 C, mean 71.5. 

 M. arundinacea var. No. 2: 71 to 73 C, mean 72. 

 M. massangeana: 68 to 70 C, mean 69. 

 Af . musaica: 88 to 89 C, mean 88.5. 



M. 

 M. 



M. 



M. 



Effects op Various Reagents. 

 Reaction with Chloral Hydrate-Iodine. 



M. arundinacea: Begins immediately; complete in prac- 

 tically aU in 3 minutes. 



M. arundinacea var. No. 1: Begins immediately; com- 

 plete in practically all in 3J^^ minutes. 



M. arundinacea var. No. 2: Begins immediately; com- 

 plete in practically all in 43^ minutes. 



M. massangeana: Begins himiediately; complete in prac- 

 tically aU in 7 minutes. 



M. leuconeura: Begins immediately; complete in practi- 

 cally all in 2 minutes. 



M. musaica: Begins immediately; complete in practically 

 all in 9 minutes. 



Reaction with Chromic Acid. 



M. arundinacea: Begins immediately; complete in practi- 

 cally all in 3 J^ minutes. 



M. arundinacea v&T. No. 1 : Begins immediately; complete 

 in practically all in 2 minutes. 



M. arundinaceavax. No. 2: Begins immediately; complete 

 in practically all in 1 J/^ minutes. 



M. massangeana: Begins immediately; complete in prac- 

 tically all in 3 minutes. 



M. leuconeura: Begins immediately; complete in practi- 

 cally all in 2 minutes. 



M. musaica: Begins immediately; complete in practically 

 all in 8 minutes. 



Reaction with Pyrogallic Acid. 



M. arundinacea: Begins immediately; complete in 45 sec- 

 onds. 



M. arundinacea var. No.l: Begins immediately; complete 

 in all in 1 to 154 minutes. 



M. arundinacea var. No 2: Begins immediately; complete 

 in all in 2 minutes. 



M. massangeana: Begins immediately; complete in all in 

 a minute. 



M. leuconeura: Begins immediately; complete in practi- 

 cally all in 35 seconds. 



M. musaica: Begins immediately; complete in practically 

 aU in 11 minutes. 



Reaction with Ferric Chloride. 



M. arundinacea: Begins in a few immediately; complete 

 in practically all in 5 minutes. 



M. arundinacea var. No. 1: Begins in two-thirds in 2 min- 

 utes; complete in practically all in 10 minutes. 



M. aruiidinacea var. No. 2: Begins in some at once; com- 

 plete in practically all in 15 minutes. 



M. massangeana: Begins immediately; complete in prac- 

 tically all in 15 minutes. 



M. leuconeura: Begins immediately; complete in practi- 

 cally all in 6 minutes. 



M. musaica: Begins immediately; complete in about five- 

 sixths in 60 minutes. 



Reaction with Purdy's Solution. 



M. arundinacea: Begins in a few in IJ^ minutes; complete 

 in one-eighth in 60 minutes. 



M. arundinaceavar. No. 1 : Begins immediately; complete 

 in nearly all in 30 minutes; no further progress in an 

 hour. 



M. arundinacea var. No. 2: Begins in 30 seconds or less; 

 complete in two-thirds in 30 minutes, and in four- 

 fifths in 60 minutes. 



M. massangeana: Begins in a few in a minute; complete 

 in one-fiftieth in 30 minutes, and in one-tenth in 60 

 minutes. 



JW. Zeuconeura." Begins immediately; complete in one- 

 ninth in 30 minutes with no further reaction in an 

 hour. 



M. musaica: Begins in a few in a minute; complete in one- 

 thirtieth in 30 minutes, and one- twentieth in an 

 hour. 



