A Study on the Etiological Factors of Bilharzial Bladder Cancer in Egypt. 6. The Possible Role of Urinary Bacteria

1982 ◽  
Vol 68 (1) ◽  
pp. 23-28 ◽  
Author(s):  
Abdelbaset Anwer El-Aaser ◽  
Mahmoud Mohamed El-Merzabani ◽  
Nadia Ahmed Higgy ◽  
Abdel E. El-Habet
Keyword(s):  
Escherichia Coli ◽  
Bladder Cancer ◽  
Enzyme Activity ◽  
Nitrate Reductase ◽  
Bacterial Infection ◽  
Schistosoma Haematobium ◽  
Nitrate Reductase Activity ◽  
Reductase Activity ◽  
Glucuronidase Activity

A correlation was obtained between a positive nitrite test in urine and the severity of urinary bacterial infection. Bacteria isolated from the urine of bilharzial or bladder cancer patients were found to be rich in nitrate reductase activity. « Escherichia coli » was the most common microorganism isolated from these specimens. Urine and several urinary constituents activate bacterial nitrate reductase. β-Glucuronidase activity in the urine of patients with chronic « Schistosoma haematobium » infection and bladder cancer was measured and shown to be significantly greater than that of urine of normal control subjects. Urinary bacterial infection was shown to be the source of the increased urinary level of enzyme activity at pH 7.0.

Acid phosphatase, alkaline phosphatase, and nitrate reductase activity of selected ectomycorrhizal fungi

1989 ◽  
Vol 67 (3) ◽  
pp. 750-753 ◽  
Author(s):  
Iwan Ho
Keyword(s):  
Alkaline Phosphatase ◽  
Enzyme Activity ◽  
Acid Phosphatase ◽  
Nitrate Reductase ◽  
Phosphatase Activity ◽  
Ectomycorrhizal Fungi ◽  
Acid Phosphatase Activity ◽  
Nitrate Reductase Activity ◽  
Reductase Activity ◽  
Phosphatase Alkaline

Seventeen isolates, encompassing five genera and eight species of ectomycorrhizal fungi, were compared for acid phosphatase, alkaline phosphatase, and nitrate reductase activity. Isolates within species differed in enzyme activity and isozyme patterns by host specificity and site (as exemplified by the genus Suillus). Host and site may have affected phosphatase enzyme activity. Generally, the Douglas-fir associates, which dominate in mesic sites, have higher acid phosphatase activity than pine associates, which mostly occupy xeric sites; however, pine associates from mesic sites also have higher acid phosphatase activity (e.g., S. tomentosus). In four isolates of Amanita muscaria, the effect of site was also apparent. Two of them, which have significantly higher acid phosphatase activity than the others, were isolated from mesic sites. The isozyme pattern of the genus Suillus appeared to be separated by host groups. Other isolates with only one species also differed more or less by host groups. They shared at least one band within host groups, except for the two isolates of Paxillus involutus from different hosts. The P. involutus S-403 isolated from an orchard showed much higher nitrate reductase activity than all other isolates. No apparent differences in nitrate reductase activity were found between the other isolates.

Nitrate Reductase Profiles in Leaves of Tall Morningglory Seedlings

Weed Science ◽  
1973 ◽  
Vol 21 (6) ◽  
pp. 561-564 ◽  
Author(s):  
Donald S. Galitz
Keyword(s):  
Enzyme Activity ◽  
Nitrate Reductase ◽  
Nitrate Reductase Activity ◽  
Reductase Activity ◽  
Leaf Growth ◽  
Leaf Tissue ◽  
Plant Leaf ◽  
Ipomoea Purpurea ◽  
True Leaf

Nitrate reductase activity of seed leaves and the first three true leaves of tall morningglory [Ipomoea purpurea (L.) Roth] was shown to increase rapidly initially then gradually decrease. The greatest level of reductase activity of each true leaf was reached at the fourth to fifth day after unfolding. A subsequent leveling off of enzyme activity corresponded to the acceleration of leaf growth. Leaf nitrates were correlated with enzyme activity. The sum of leaf activities was used to estimate the total reductive capacity of the plant leaf tissue at each sampling date.

scholarly journals Differential regulatory role of nitric oxide in mediating nitrate reductase activity in roots of tomato (Solanum lycocarpum)

2009 ◽  
Vol 104 (1) ◽  
pp. 9-17 ◽  
Author(s):  
Chong Wei Jin ◽  
Shao Ting Du ◽  
Yong Song Zhang ◽  
Xian Yong Lin ◽  
Cai Xian Tang
Keyword(s):  
Nitric Oxide ◽  
Nitrate Reductase ◽  
Nitrate Reductase Activity ◽  
Reductase Activity ◽  
Regulatory Role

scholarly journals Treatment of soybean seeds with molybdenum and inoculant: nitrate reductase activity and agronomic performance

2019 ◽  
Vol 10 (1) ◽  
pp. 186-194
Author(s):  
Ewerton Gewehr ◽  
Otávio De Oliveira Corrêa ◽  
Anna Dos Santos Suñé ◽  
Gabriel Bandeira Duarte ◽  
Luciano Do Amarante ◽  
...  
Keyword(s):  
Enzyme Activity ◽  
Nitrate Reductase ◽  
Seed Treatment ◽  
Nitrate Reductase Activity ◽  
Seed Quality ◽  
Agronomic Traits ◽  
Reductase Activity ◽  
Seedling Emergence ◽  
Seed Vigour ◽  
Presence And Absence

The aim of this study was to analyze the effects of molybdenum and inoculant application via seed treatment in soybean, and their role in the nitrate reductase enzyme activity, agronomic traits and physiological quality of the produced seeds. The experiment was conducted at the Federal University of Pelotas (UFPel), Rio Grande do Sul state, Brazil. The treatments were shaped by five doses of molybdenum (zero; 16; 32; 48; 64 g.100kg-1 of seeds) combined with the presence and absence of liquid inoculant (Bradyrhizobium japonicum), at a dose of 200 mL per 100 kg of seeds. The evaluations of nitrate reductase activity, agronomic traits and physiological seed quality were performed in the present work. The measured agronomic traits were: plant height, number of pods per plant, number of seed per plant and thousand-seed weight. Standard germination test was executed to evaluate the produced seed viability. First germination counting, accelerated aging test, cold test, plantlet shoot and root length, plantlet shoot and root dry mass, and field seedling emergence were utilized to measure the seed vigour. Molybdenum, both in presence and absence of inoculant, positively influenced the enzymatic activity, for both vegetative and reproductive stages. The addition of inoculant and molybdenum provided increase in the vigour of the produced seeds. The enzyme activity was positively correlated with the agronomic traits and vigour tests. The addition of inoculant and molybdenum in the seed treatment provides a better expression of nitrate reductase activity and vigour of the produced seeds.

scholarly journals Salivary Nitrate, Nitrite and Nitrate Reductase Activity in Relation to Risk of Oral Cancer in Egypt

1998 ◽  
Vol 14 (2) ◽  
pp. 91-97 ◽  
Author(s):  
Alaa F. Badawi ◽  
Gehan Hosny ◽  
Mohamed El-Hadary ◽  
Mostafa H. Mostafa
Keyword(s):  
Oral Cancer ◽  
Nitrate Reductase ◽  
Odds Ratio ◽  
Nitrate Reductase Activity ◽  
Reductase Activity ◽  
Healthy Individuals ◽  
Oral Cancer Patients ◽  
Nitrate And Nitrite ◽  
Increased Activity

It has been suggested that nitrate and nitrite may play a role in the etiology of human oral cancer. We investigated whether salivary nitrate and nitrite and the activity of nitrate reductase (NRase) may affect the risk of oral cancer in Egypt, an area with high levels of environmental nitrosating agents. Levels of salivary nitrite (8.3 ± 1.0 μg/ml) and nitrate (44 ± 3.7 μg/ml) and activity of NRase (74 ± 10 nmol/ml/min) were significantly (P< 0.05) higher in oral cancer patients (n= 42) compared to control Egyptian healthy individuals (n= 40, nitrite = 5.3 ± 0.3 μg/ml, nitrate = 27 ± 1.2 μg/ml, and NRase activity = 46 ± 4 nmol/ml/min). The adjusted odds ratio (OR) and the 95% confidence intervals (C.I.) for risk of oral cancer, categorized by the levels of salivary nitrate and nitrite and NRase activity, showed a higher cancer risk associated with nitrite > 7.5 μg/ml (OR: 3.0, C.I.: 1.0–9.3), nitrite > 40 μg/ml (OR: 4.3, C.I.: 1.4–13.3) and NRase activity > 50 nmol/ml/min (OR: 2.9, C.I.: 1.1–7.4). Our findings suggest that increased consumption of dietary nitrate and nitrite is associated with elevated levels of salivary nitrite. Together with the increased activity of salivary NRase, these observations may explain, at least in part, the role of nitrate and nitrite in the development of oral cancer in individuals from an area with a high burden ofN-nitroso precursors.

Nitrate reductase activity in Paul's scarlet rose suspension cultures and the differential role of nitrate and molybdenum in induction

Planta ◽  
1978 ◽  
Vol 141 (2) ◽  
pp. 183-189 ◽  
Author(s):  
R. W. Jones ◽  
A. J. Abbott ◽  
E. J. Hewitt ◽  
G. R. Best ◽  
E. F. Watson
Keyword(s):  
Nitrate Reductase ◽  
Nitrate Reductase Activity ◽  
Reductase Activity ◽  
Suspension Cultures
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