scholarly journals Studies on Wheat Peroxidase

1969 ◽  
Vol 22 (1) ◽  
pp. 261 ◽  
Author(s):  
RW Parish
Keyword(s):  
Peroxidase Activity ◽  
Tobacco Leaf ◽  
The Relationship ◽  
Leaf Disks

Recently, workers in this laboratory have studied the increased synthesis of peroxidase in senescing tobacco leaf disks (Parish 1968a, 1968b) and the relationship between lignification and peroxidase activity in wheat internodes (Parish and Miller 1968). The present paper reports four simple experiments designed to further clarify the interrelationships between lignification, maturation, and peroxidase activity.

scholarly journals Factors Influencing Tobacco Leaf Quality: an Investigation of the Literature

1984 ◽  
Vol 12 (3) ◽  
Author(s):  
S. Mendell ◽  
E. C. Bourlas ◽  
M. Z. DeBardeleben
Keyword(s):  
Chemical Constituents ◽  
Summary Table ◽  
Leaf Quality ◽  
Tobacco Leaf ◽  
Factors Influencing ◽  
The Relationship

AbstractThis paper comprises a review of the published literature (1936-1979) dealing with the relationship between the chemical constituents of tobacco and smoke and tobacco and smoke quality. Various components thought to be influential in determining quality are identified; conclusions of researchers regarding the effects of these components are recorded and discussed. A summary table is presented which details the nature of the relationship between these constituents and tobacco quality.

scholarly journals Peroxidase activity in human cutaneous mast cells: an ultrastructural demonstration.

1984 ◽  
Vol 32 (6) ◽  
pp. 573-578 ◽  
Author(s):  
L M Escribano ◽  
L C Gabriel ◽  
T Sainz ◽  
A Rocamora ◽  
J M Arrazola ◽  
...  
Keyword(s):  
Mast Cell ◽  
Enzyme Activity ◽  
Mast Cells ◽  
Peroxidase Activity ◽  
Ultrastructural Level ◽  
Prostaglandin Synthesis ◽  
Cell Disease ◽  
Mast Cell Disease ◽  
Cytochemical Technique ◽  
The Relationship

An intense and reproducible peroxidase staining in the cutaneous mast cells of two patients with systemic mast cell disease and urticaria pigmentosa is demonstrated at the ultrastructural level. This enzyme activity was demonstrated by use of a cytochemical technique employing 3,3'- diaminobenzicine (DAB) as an oxidizable substrate, after fixation by a tannic acid-aldehyde mixture. Enzyme activity was localized in the perinuclear cisterna and strands of endoplasmic reticulum. Granules appeared unreactive. This peroxidase activity appears sensitive to fixation by aldehydes; it is inhibited by 3-amino-1,2,4-triazole (AMT) and by lack of H2O2 or DAB in the incubation medium. These characteristics are fundamentally different from the peroxidase activity of basophils, and the demonstration of this enzyme is therefore not a further argument for a common ontogenetic origin of both cells. On the other hand, the cytochemical characteristics of this enzyme are very similar to those of platelet peroxidase (P-PO), which has been connected to the synthesis by platelets of prostaglandins. Since the mast cell is known to generate prostaglandins, the relationship between the enzyme described and prostaglandin synthesis by mast cells is discussed.

The Effect of Kinetin on Protein Level of Tobacco Leaf Disks

1962 ◽  
Vol 15 (3) ◽  
pp. 457-464 ◽  
Author(s):  
Masahiro Sugiuka ◽  
Keiko Umemura ◽  
Yukito Oota
Keyword(s):  
Protein Level ◽  
Tobacco Leaf ◽  
Leaf Disks
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