In-Stream Bioreactor for Agricultural Nitrate Treatment

2009 ◽  
Vol 38 (1) ◽  
pp. 230-237 ◽  
Author(s):  
W. D. Robertson ◽  
L. C. Merkley
Keyword(s):  
Nitrate Treatment

The Vyredox and Nitredox Methods of in situ Treatment of Groundwater

1988 ◽  
Vol 20 (3) ◽  
pp. 149-163 ◽  
Author(s):  
Carol Braester ◽  
Rudolf Martinell
Keyword(s):  
Water Treatment ◽  
Surface Water ◽  
Traditional Method ◽  
Treatment Method ◽  
Nitrate Treatment ◽  
The Past ◽  
The World ◽  
Nitrate And Nitrite ◽  
Iron And Manganese

Nearly one fifth of all water used in the world is obtained from groundwater. The protection of water has become a high priority goal. During the last decades pollution of water has become more and more severe. Today groundwater is more and more used in comparison with surface water. Recently we have seen accidents, which can pollute nearly all surface water very quickly. Generally the groundwater is easier to protect, as well as cheaper to purify, and above all it is of better quality than the surface water. During the past two decades, alternatives to the traditional method of treating the water in filters have been developed, that is in situ water treatment i.e. the VYREDOX and NITREDOX methods. The most common problem regarding groundwater is too high content of iron and manganese, which can be reduced with the VYREDOX method. In some areas today there are severe problems with pollution by hydrocarbons and nitrate as well, and with modification of the VYREDOX treatment method it is used for hydrocarbon and nitrate treatment as well. The method to reduce the nitrate and nitrite is known as the NITREDOX method.

Nitrate removal and denitrification affected by soil characteristics in nitrate treatment wetlands

2007 ◽  
Vol 42 (4) ◽  
pp. 471-479 ◽  
Author(s):  
Ying-Feng Lin ◽  
Shuh-Ren Jing ◽  
Der-Yuan Lee ◽  
Yih-Feng Chang ◽  
Kai-Chung Shih
Keyword(s):  
Nitrate Removal ◽  
Soil Characteristics ◽  
Treatment Wetlands ◽  
Nitrate Treatment

scholarly journals Salicylic acid and potassium nitrate promote flowering through modulating the hormonal levels and protein pattern of date palm Phoenix dactylifera ‘Sayer’ offshoot

2019 ◽  
Vol 114 (2) ◽  
pp. 231 ◽  
Author(s):  
Hussein Jasim SHAREEF
Keyword(s):  
Salicylic Acid ◽  
Molecular Mass ◽  
Date Palm ◽  
Salt Water ◽  
Protein Pattern ◽  
Phoenix Dactylifera ◽  
Potassium Nitrate ◽  
Protein Patterns ◽  
Nitrate Treatment

<p>Salicylic acid enhances the flowering process in the plant by creating new proteins under salinity stress. The study was to determine the role of salicylic acid (500 ppm) and potassium nitrate (1500 ppm), on flowering of date palm ‘Sayer’ offshoots under salinity effect. Application of salicylic acid increased the number of clusters, the number of new leaves, the content of carbohydrates, ascorbic acid, indoleacetic acid, zeatin, gibberellin, and abscisic acid significantly under salinity compared with control. Although the measured parameters were the highest in plants treated with salicylic acid, there was no distinction among potassium nitrate treatment under saltwater, and salicylic acid treatment with saltwater. Salicylic acid and potassium nitrate treatment demonstrated some amazing contrasts in protein patterns in light of gel electrophoresis. Plants treated with salicylic acid with fresh water and with saltwater showed five and six protein bands, respectively, that differed in the molecular mass of one polypeptide compared to control with freshwater. However, there was a difference in the molecular mass of two polypeptides compared to control with salt water, which showed six bands. In contrast, potassium nitrate application showed five protein bands, whether with freshwater or with saltwater. The findings could facilitate to elucidate the flowering mechanisms in date palm.<br /><strong></strong></p>

Influence of laser structuring and barium nitrate treatment on morphology and electrophysical characteristics of vertically aligned carbon nanotube arrays

2019 ◽  
Vol 96 ◽  
pp. 104-111 ◽  
Author(s):  
Alexander Yu. Gerasimenko ◽  
Evgeny P. Kitsyuk ◽  
Artem V. Kuksin ◽  
Roman M. Ryazanov ◽  
Andrey I. Savitskiy ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Barium Nitrate ◽  
Nanotube Arrays ◽  
Nitrate Treatment ◽  
Carbon Nanotube Arrays ◽  
Laser Structuring ◽  
Vertically Aligned

SILVER NITRATE TREATMENT OF THERMAL BURNS

1966 ◽  
Vol 6 (3) ◽  
pp. 399-406 ◽  
Author(s):  
MALCOLM LENTZ ◽  
RALPH SEATON ◽  
BRUCE G. MACMILLAN
Keyword(s):  
Silver Nitrate ◽  
Thermal Burns ◽  
Nitrate Treatment

Bitter pit in the apple variety Cleopatra in Tasmania in relation to calcium and magnesium

1960 ◽  
Vol 11 (5) ◽  
pp. 742 ◽  
Author(s):  
D Martin ◽  
TL Lewis ◽  
J Cerny
Keyword(s):  
Calcium Nitrate ◽  
Calcium Content ◽  
Magnesium Nitrate ◽  
Critical Element ◽  
Apple Variety ◽  
Nitrate Treatment ◽  
Significant Difference ◽  
Bitter Pit ◽  
Calcium And Magnesium ◽  
Potassium Magnesium

When spray treatments were applied to half-trees of Cleopatra apples, it was shown that magnesium nitrate increased the incidence of pit and calcium nitrate decreased it. There was a suggestion that borax decreased the effectiveness of the calcium nitrate treatment. Magnesium or calcium nitrate, with or without borax, did not affect the potassium, magnesium, phosphorus, or nitrogen content of the fruit cortex. Calcium nitrate in 1959 increased the calcium content but magnesium nitrate had no effect. There was no significant difference in the content of potassium, magnesium, or phosphorus between 1958 and 1959, but the calcium content was 3.3 times as high in 1958. Pit incidence was low in 1958 and high in 1959. No significant difference in content of these four elements could be demonstrated between sound and pitted fruits. The results support the view that calcium is the critical element in pit incidence and that magnesium may play an important part.

Isotopic Discriminations During the Accumulation of Nitrogen by Soybeans

1988 ◽  
Vol 15 (3) ◽  
pp. 407 ◽  
Author(s):  
FJ Bergersen ◽  
MB Peoples ◽  
GL Turner
Keyword(s):  
N2 Fixation ◽  
Root Nodules ◽  
Xylem Sap ◽  
Vacuum Treatment ◽  
Natural Abundance ◽  
Mineral Nutrient ◽  
Similar Time ◽  
Total N ◽  
Plant Nitrogen ◽  
Nitrate Treatment

Soybeans were grown in a glasshouse in sand-vermiculite medium supplied daily with a mineral nutrient solution essentially free of combined N or containing 5 mM nitrate of known 15N abundance. The natural abundance of 15N in parts of plants and in nitrogen remaining in the medium was determined from 15 days after planting until fruiting. In nodulated plants completely dependent on N2 fixation for growth, the δ15N of plant nitrogen was uniformly negative at 56 days (overall mean: -0.90� 0.17) after adjustment for the effect of seed nitrogen. The δ15N of root nodules increased with time (max. 9.6‰), as that of shoots declined (min. - 1.3 ‰). The δ15N of every mainstem trifoliolate leaf and of the first (unifoliolate) leaf declined from initially positive values (0.5 to 2 ‰) to about - 2‰ with similar time courses, irrespective of the time of initiation. There were no significant losses of N from the plants during growth. There were differences between the δ15N of the total N of root-bleeding xylem sap and of sap extracted by vacuum treatment of stems. These were due to differences between the proportions of ureide-N and amino-N and between the δ15N values of these components. When nodulated plants were supplied daily with 5 mM nitrate (δ15N = 7.68‰) between 21 and 35 days, N2 fixation was reduced to 63% of N assimilated but growth and accumulation of nitrogen were affected little. Following removal of nitrate, there were changes in growth which led to enhanced nodulation and N2 fixation. The δ15N of the total N of trifoliolate leaves which were initiated or expanded before or during the period of nitrate treatment remained positive; those expanded or initiated after the treatment became negative in δ15N, as in the corresponding leaves of untreated nodulated plants. The δ15N of nodules was unaffected by the nitrate treatment. In plants (non-nod. Clark '63) supplied continuously with nitrate, the δ15N of the total N of entire plants rose quickly from values for seeds, but to values significantly higher than in the nitrate. These results are discussed in relation to the effects on the use of 15N natural abundance data for estimating utilisation of atmospheric N2 by nodulated plants.

scholarly journals Influence of Nitrogen Source and Growth Phase on Extracellular Biosynthesis of Silver Nanoparticles Using Cultural Filtrates of Scenedesmus obliquus

2019 ◽  
Vol 9 (7) ◽  
pp. 1465 ◽  
Author(s):  
Osama Darwesh ◽  
Ibrahim Matter ◽  
Mohamed Eida ◽  
Hassan Moawad ◽  
You-Kwan Oh
Keyword(s):  
Silver Nanoparticles ◽  
Nitrogen Source ◽  
Antimicrobial Agents ◽  
Scenedesmus Obliquus ◽  
Nitrogen Sources ◽  
Nitrate Treatment ◽  
Extracellular Biosynthesis ◽  
Microalgal Culture ◽  
Transmission Electron ◽  
Green Microalga

In this study, silver nanoparticles (AgNPs) were green-synthesized extracellularly by the action of bioactive compounds in cultural filtrates of green microalga Scenedesmus obliquus (KY621475). The influences of six different nitrogen sources (i.e., NaNO3, CO(NH4)2, (NH4)2CO3, KNO3, NH4NO3, and (NH4)2SO4) on extracellular biosynthesis of AgNPs were observed by UV–Visible spectroscopy (380–425 nm) and confirmed using high-resolution transmission electron microscopy (HRTEM). The highest biomass production was observed in the case of urea and ammonium carbonate treatments, which, surprisingly, showed negative activity for AgNPs biosynthesis. Considering their coupling and compatible presence in cultural filtrates, reductases (especially nitrate reductase) as reduction agents are assumed to play a key role in the extracellular biosynthesis of AgNPs. The cultural filtrates of the potassium and sodium nitrate treatments produce AgNPs of relatively small size (5–10 and 4–10 nm, respectively), smaller than those produced by filtrate of ammonium nitrate treatment. The antimicrobial activity of produced AgNPs was a function mainly of particle size, which was influenced by the nitrogen source of the microalgal culture. The AgNPs produced from the KNO3 and NaNO3 cultural filtrates performed the best as antimicrobial agents.

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