In the past, exposure assessments focussed on exposure to single substances and by single routes. In the nineties, aggregate exposure assessment began to receive more attention and instruments to enable these assessments started to develop. The development of regulatory frameworks requiring aggregation of exposure for e. However, in some areas such as contaminated site assessment, aggregate exposure assessment has long been the routine approach for screening risk assessments. This literature review provides a summary of regulatory, policy and scientific documents that address the issue of aggregate exposure. The focus of the review is on the rationale, background and processes for aggregate exposure.
Study on Compressive Strength of Quarry Dust as Fine Aggregate in Concrete
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Pharmacovigilance Literature Monitoring
Make old cement concrete as recycled aggregate can not only protect environment, saving resources, but also can reduce the project cost, and promoting the sustainable development. This paper based on the related recycled concrete aggregate RCA Recycled Concrete Aggregate literature, mainly involve its properties, preparation and performance of RCA concrete, construction application etc.. This has got a lot of reliable conclusions, so as to give some inspiration and help to the related scholars. Request Permissions. Francis Yang, [ American] David Darwin.
Introduction: Mineral trioxide aggregate MTA has been recommended for various uses in endodontics. Two previous publications provided a comprehensive list of articles from November September regarding the chemical and physical properties, sealing ability, antibacterial activity, leakage, and biocompatibility of MTA. The purpose of Part III of this literature review is to present a comprehensive list of articles regarding animal studies, clinical applications, drawbacks, and mechanism of action of MTA. Methods: A review of the literature was performed by using electronic and hand-searching methods for the clinical applications of MTA in experimental animals and humans as well as its drawbacks and mechanism of action from November September Results: MTA is a promising material for root-end filling, perforation repair, vital pulp therapy, and apical barrier formation for teeth with necrotic pulps and open apexes.