Remineralization of labile organic nitrogen is a key part cycling in seawater, yet factors controlling this process remain poorly understood. The degradation and fate amino acids coastal waters were investigated with incubation experiments using 15N-labeled alanine (Ala). Ala, including the release NH4+ through remineralization, subsequent removal via assimilation nitrification, formation refra...

The utility of 15N isotope dilution models for the calculation of uptake and remineralization of NH4+ by marine phytoplankton was examined in light of model limitations when applied to field data either when ambient NH4+ levels border on our limit of detection or when there is no statistically significant difference between ambient NH,+ at the beginning and end of an incubation. Through specifi...

dental caries is an infectious disease that can be prevented in several ways. the aim of this study was to compare the efficacy of sodium fluoride mouthrinse and nano- hydroxyapatite (nano-ha) for the remineralization of incipient caries.after obtaining different concentrations of nano-ha (0-2-5-10%), 60 sound premolars fixed in acrylic blocks were coated with nail polish except for one surface...

Phosphorus sets the pace of marine biological productivity on geological time scales. Recent estimates of Precambrian phosphorus levels suggest a severe deficit of this macronutrient, with the depletion attributed to scavenging by iron minerals. We propose that the size of the marine phosphorus reservoir was instead constrained by muted liberation of phosphorus during the remineralization of bi...

The objective of this in-vitro study is evaluation remineralization potential three agents- Tricalcium phosphate flouride(TCP-F), Calcium sucrose phosphate(CaSP), Casein phosphopeptide- amorphous calcium phosphate(CPP-ACP) in artificial enamel lesion using laser fluorescence based DIAGNOdent(KaVo). 30 single rooted premolars were selected. Samples randomly divided into 3 groups with 10 samples ...

the growing demand for enhanced esthetic appearance has led to great developments in bleaching products. the exposure of hard tissues of the tooth to bleaching agents can affect the roughness of the enamel surface. the freshly bleached enamel surface exposed to various surface treatments such as fluoride and other remineralizing agents have been assessed in this study. the aim of this experimen...

As all practitioners are aware, the prevalence and incidence of dental caries keep increasing constantly therefore early diagnosis cessation further progression would greatly help in maintaining sound tooth structure. One earliest signs is a white spot lesion, which mostly missed, only treated when condition worsens. WSL areas demineralized enamel that occur due to prolonged period retained mic...

  Objective: Amorphous calcium phosphate (ACP) is a reactive solution capable of releasing calcium and phosphate ions, conversion to apatite and remineralization of mineral tooth structure. This study reviews ACP structure, its properties and its applications in dentistry.   Methods: In this review study, keywords including “amorphous calcium phosphate”, “mineralization”, “hydroxyapatite”, “cas...

Objectives. The objectives of this study were to: (1) develop a bioactive multifunctional composite (BMC) via nanoparticles of amorphous calcium phosphate (NACP), 2-methacryloyloxyethyl phosphorylcholine (MPC), dimethylaminohexadecyl methacrylate (DMAHDM) and nanoparticles of silver (NAg); and (2) investigate the effects of combined BMC + poly (amido amine) (PAMAM) on remineralization of demine...