in this study the effect of nitrogen form and different oxygen levels on growth and development and macronutrients concentrations in lettuce plants was investigated. this investigation showed that sole ammonium application caused fresh and dry weight reduction of shoot and root in lettuce plant. but different oxygen levels had no effect on them. nitrogen concentration of shoot was higher in amm...

Abstract Nitrates when found in excess in the groundwater, is a health hazard. Nitrates can easily be transported by groundwater movement and may eventually reach aquifers located far away from the contamination location. It is important to monitor the nitrate movement in the groundwater to predict the extent of nitrate contamination. Traditionally, nitrate movement is monitored by sampling gro...

Toxicosis produced by nitrates and related compounds is a problem in man and in domestic animals. The most prominent effect of nitrate and nitrite is the conversion of hemoglobin to methemoglobin. Nitrate must be reduced to nitrite before excessive -methemoglobinemia occurs. Nitrites are therefore several times more toxic than nitrates. -· Pharmacologically, KN03 had been used as a diuretic, an...

Microalgae based biofuels are getting attention due to energy crisis and enviromental protection. In the present study, the Chlorella sp. was cultivated in BG-11 medium at batch mode. The effect of different nitrogen (sodium nitrate, potassium nitrate and urea) and organic carbon (glucose, glycerol and sucrose) sources were analyzed on growth and lipid accumulation on this species. The highest ...

Small ubiquitin-related modifier (SUMO) is a small polypeptide that modulates protein activity and regulates hormone signalling, abiotic and biotic responses in plants. Here we show that AtSIZ regulates nitrogen assimilation in Arabidopsis through its E3 SUMO ligase function. Dwarf plants of siz1-2 flower early, show abnormal seed development and have high salicylic acid content and enhanced re...

In this study, topical effectiveness of silver nitrate pencil on 33 dairy cows with ringworm (Fig. 1) was evaluated. The diameter, number and localized areas of lesions were recorded in each cattle. Later lesions were first cleansed with 70 % ethyl alcohol. Skin scraping and hair specimens were collected of the margin of the lesion using a sterile scalpel blade into sterile petri dish. Lesions ...

BACKGROUND & OBJECTIVES Rapid susceptibility testing of Mycobacterium tuberculosis strains is imperative for therapy selection but traditional drug susceptibility tests take weeks or are expensive. In this study we evaluated nitrate reductase assay which utilizes the detection of nitrate reduction as an indication of growth and therefore results can be obtained faster than by visual detection o...

BACKGROUND While it is well established that dietary nitrate reduces the metabolic cost of exercise, recent evidence suggests this effect is maintained 24 h following the final nitrate dose when plasma nitrite levels have returned to baseline. In addition, acute dietary nitrate was recently reported to enhance peak power production. Our purpose was to examine whether chronic dietary nitrate sup...

Trichophyton violaceum, a less common and geographically restricted infection is reported in a 18-day-old neonate. The diagnosis was made by potassium hydroxide of skin scraping examination and confirmed by culture. The patient was treated successfully with miconazole nitrate application. A large family with crowded living was considered the main predisposing factor.

Five-day-old seedlings of corn (Zealpha mays L.) grown without nitrate were decapitated and exposed to 0.5 mm KNO(3) or 0.5 mm KCl in aerated solutions at 30 C. Uptake of nitrate, chloride, and potassium was determined by replacing solutions hourly and measuring their depletion. Translocation of these ions and of organic nitrogen was determined by hourly analysis of the vascular exudate. Nitrat...