scholarly journals Comparison between Aging of Slices and Ethylene Treatment of Whole White Potato Tubers

1980 ◽  
Vol 66 (1) ◽  
pp. 171-174 ◽  
Author(s):  
Harry W. Janes ◽  
Steven C. Wiest
Keyword(s):  
Potato Tubers ◽  
White Potato ◽  
Ethylene Treatment

Effect of foliar applications of chloride and sulfate on the specific gravity of white potato tubers

1960 ◽  
Vol 37 (11) ◽  
pp. 377-378 ◽  
Author(s):  
H. W. Gausman ◽  
G. O. Estes ◽  
R. A. Struchtemeyer
Keyword(s):  
Specific Gravity ◽  
Potato Tubers ◽  
White Potato

scholarly journals Effects of 3,5-Dihalogenated-4-hydroxybenzonitriles on the Activity of Mitochondria From White Potato Tubers

1969 ◽  
Vol 44 (3) ◽  
pp. 429-434 ◽  
Author(s):  
Thomas E. Ferrari ◽  
Donald E. Moreland
Keyword(s):  
Potato Tubers ◽  
White Potato

Activation of Chromatin-Bound DNA-Dependent RNA Polymerase (E.C. 2.7.7.6.) in Plant Storage Tissue Slices

1977 ◽  
Vol 32 (3-4) ◽  
pp. 229-235 ◽  
Author(s):  
Günter Kahl ◽  
Manfred Wechselberger
Keyword(s):  
Rna Polymerase ◽  
Metal Ion ◽  
Nearest Neighbor ◽  
Potato Tubers ◽  
White Potato ◽  
Tissue Slices ◽  
Divalent Metal Ion ◽  
Aging Phenomenon ◽  
Tissue Aging ◽  
Polymerase I

Abstract Chromatin, RNA Polymerase, Potato Tuber Tissue, Aging Phenomenon The synthesis of RNA by chromatin-bound RNA polymerase (E.C. 2.7.7.6.) from white potato tubers proceeds at a low rate, which is enhanced after slicing the tissue, however. Concomitantly DNA template availability as measured with saturating amounts of Escherichia coli polymerase is diminished drastically. Nearest neighbor frequency analysis proved that the RNA synthesized on chromatin of intact tubers is different from that synthesized on chromatin of sliced tissue. The RNA polymerase of white potato tubers is dependent on all four ribonucleoside triphos­ phates and a divalent metal ion such as Mg2+ or Mn2+ and totally inhibited by the presence of pyrophosphate. Actinomycin D blocks the formation of the RNA product, which could be shown to be a heteropolymer by nearest neighbour frequency technique. The Km of the chromatin-bound enzyme with regard to ATP, GTP, CTP and UTP was 5.1 X10-5 M, 1.6X10-5 M, 0.9X10-5 M and 0.45 X 10-5M/1 respectively, α-amanitin inhibits the overall activity to about 50%, which indicates the presence of equal amounts of polymerase I and polymerase If.

Composition of White Potato Starch (Ipomea batatas L.) with Avocado Seed Starch (Persea americana Mill) and Glyserol Concentration in Edible Film

2020 ◽  
Vol 2 (2) ◽  
Author(s):  
Musdar Musdar ◽  
Lukmanul Hakim ◽  
Juliani Juliani ◽  
Jailani Jailani
Keyword(s):  
Sweet Potato ◽  
Potato Starch ◽  
Persea Americana ◽  
Edible Film ◽  
Glycerol Concentration ◽  
White Potato ◽  
Ipomea Batatas ◽  
Sweet Potato Starch ◽  
Local Plants ◽  
Avocado Seed

White sweet potato starch (Ipomea batatas L.) and avocado seed starch (Parsea americana Mill) derived from local plants have the potential to be developed as agricultural products. Starch is a hydrocolloid compound as a potential local resource to be utilized. Glycerol function as an anti-freezing which is hygroscopic. This study aims to determine the ratio of white sweet potato starch with avocado seed starch and the concentration of glycerol for making edible film. This study was an experiment using a completely randimized factorial design with 2 (two) main factor consisting of a comparison of white sweet potato starch and avocado seed with 3 levels: P1 = 35%:65%., P2=50%:50%., P3=65%:35% and glycerol concentration with 3 levels: G1=1%., G2=2%., G3=3%. The best result reasearch were content of 23.03% (tratment P1G1), solubility of 55.57% (treatment P3G2)., swelling test of 9.83% (treatment P2g3)., elongation of 8.18% (treatment P3G2)

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