نتایج جستجو برای: raw and mineral materials

تعداد نتایج: 16890923  

Journal: :IOP Conference Series: Materials Science and Engineering 2019

شمعانیان, غلامحسین, رقیمی, مصطفی , قلی پور, محسن , مهدوی آکردی, مهدی ,

Portland cement could be produced by heating the raw materials (clay, lime stone) about 1500°C which clinker will be formed. The geochemistry and mineralogical studies of raw materials, clinker, Portland cement and dust have been carried out by optical microscopy, X-ray diffraction and X-ray florescence. The results of spectrometry indicate the presence of calcite mineral in limestone, montmori...

Journal: :New South Wales public health bulletin 2002
John Quiggin

The structure of developed economies has changed radically in recent decades. As late as the 1960s, it was reasonable to describe the economy in terms of three stages of production: primary production—of agricultural and mineral raw materials; secondary production—a manufacturing industry that transformed raw materials into items of final consumption; tertiary production—a sector that provided ...

Journal: :Вестник Алтайской академии экономики и права 2021

2014
J. Hroudova J. Zach

The majority of contemporary insulation materials commonly used in the building industry is made from non-renewable raw materials; furthermore, their production often brings high energy costs. A long-term trend as far as sustainable development is concerned has been the reduction of energy and material demands of building material production. One of the solutions is the possibility of using eas...

2017
Markus Niederer Lanfranco S. Conte Sabrina Moret

Mineral hydrocarbons consist of two fractions, mineral oil saturated hydrocarbons (MOSH) and mineral oil aromatic hydrocarbons (MOAH). MOAH is a potential public health hazard because it may include carcinogenic polycyclic compounds. In the present study, 400 MHz nuclear magnetic resonance (NMR) spectroscopy was introduced, in the context of official controls, to measure MOSH and MOAH in raw ma...

2017
Dirk W Lachenmeier Gerd Mildau Anke Rullmann Gerhard Marx Stephan G Walch Andrea Hartwig Thomas Kuballa

Mineral hydrocarbons consist of two fractions, mineral oil saturated hydrocarbons (MOSH) and mineral oil aromatic hydrocarbons (MOAH). MOAH is a potential public health hazard because it may include carcinogenic polycyclic compounds. In the present study, 400 MHz nuclear magnetic resonance (NMR) spectroscopy was introduced, in the context of official controls, to measure MOSH and MOAH in raw ma...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تهران مرکزی - دانشکده زبانهای خارجی 1392

this study focuses on tracing the clearly defined elements of magic realism in toni morrison’s song of solomon as an illustrious african american example of the mode. magic realism is a fictional technique that combines fantasy with raw physical reality in a search for truth beyond that available from the surface of everyday life. toni morrison, as a distinguished african-american practitioner ...

1999

The production process for rock mineral wool insulation products generates a number of residue streams with different physical characteristics. Together these add up to a significant proportion of the raw materials input to the process. Previously, recycling of the residue had not been viable because of the abrasive nature of the different materials streams and specific processing constraints a...

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