Permeable in situ denitrifying barriers can remove nitrate from groundwater. Barriers may be constructed by filling an excavated area with a porous mixture of sand, fine gravel, and substrate or by the injection of a nonaqueous phase substrate into an aquifer. The substrate stimulates the development of a denitrifying microbial community by providing an electron donor. The objective of this stu...

BACKGROUND The basis for progressive attenuation of the effects of organic nitrates during long-term therapy (nitrate tolerance) remains controversial; proposed mechanisms include impaired nitrate bioconversion resulting in decreased release of nitric oxide (NO) from nitrates and/or increased NO clearance through a reaction with incrementally generated superoxide (O(2)(-)). METHODS AND RESULT...

background: the aim of this study was to evaluate the physical and chemical quality of groundwater in the villages of qom province during summer 2014, and to compare the results with iran’s standard no. 1053. methods: this research is a descriptive sectional study. during the investigation, one step sampling with the necessary repetitions (if necessary) was performed of each well for evaluation...

Objective: Tooth hypersensitivity often starts in early adulthood because of gum recession and loss of the cementum covering dentin. The purpose of this study was to compare the effect of toothpaste,1 containing triclosan, potassium nitrate, zinc citrate,2 triclosan, potassium nitrate,3 calcium sodium phosphosilicate (novamin) on gingival health, plaque formation and dentin hypersensitivity in ...

In connection with a study at the Fixed Nitrogen Research Laboratory on the possible transformation products of cyanamid, there was obtained a number of materials and mixtures concerning which there is either very little known, or concerning which there is still some doubt as to their fertilizing value. Thus, in the preparation of urephos, a product was obtained in which approximately 55 per ce...

The present work aims to assess the water quality index (WQI) of Manyad Storage tank, Aurangabad district, Maharashtra, India. surface sample were assessed for physico-chemical parameters namely pH, Electrical Conductivity, Total Dissolved Solid, Hardness, Bicarbonate, Chlorides, Sulphates, Nitrates, Calcium, Magnesium, Sodium, Potassium and Fluoride in post-monsoon season 2020. For calculating...

Groundwater quality and quantity both are important for the survival of human beings on this planet. In present study an attempt has been made to assess groundwater at mass using points. To fulfil objectives study, four sites (Sahibabad, Ghaziabad, Muradnagar, Modinagar) were selected along metro line construction from Delhi Meerut. At all these sites, workers projects living working drinking p...

Groundwater is the source of all tap water in Kumamoto City, Japan. However, concentration nitrate nitrogen (NO3−-N) tends to increase every year due influences overfertilization, field disposal livestock manure, and inflow domestic wastewater. A heterotrophic nitrification–aerobic denitrification (HN-AD) system an attractive approach for nitrate-nitrogen removal. In this study, Rhodotorula gra...

Background: The present study investigated the effects of lead nitrate on the histo-cytological changes in the corpuscles of Stannius (CS) of Heteropneustes fossilis. Methods: Catfish, Heteropneustes fossilis were subjected to 657.6 mg/L and 164.4 mg/L of lead nitrate for 96 h and 28 days, respectively. Blood from fish was collected on 24, 48, 72 and 96 h in short-term and after 7, 14, 21, an...

OBJECTIVE The primary aim of this study was to compare the in vivo efficacy and safety of dentifrices containing either 5% NovaMin or 5% potassium nitrate, and a non-desensitizing dentifrice, on dentin hypersensitivity in a four-week, double-blind clinical study among a population in south India. In addition, a companion scanning electron microscopy evaluation was performed to demonstrate wheth...