The White Cement Behaviour with Different Materials Addition Submitted to UltraViolet Light Exposure

2010 ◽  
Vol 636-637 ◽  
pp. 1228-1233
Author(s):  
Olga Rodríguez ◽  
M.I. Sánchez de Rojas ◽  
M. Frías ◽  
A.R. Costa
Keyword(s):  
Ultraviolet Light ◽  
Industrial Waste ◽  
Building Materials ◽  
Light Exposure ◽  
Ultra Violet ◽  
Violet Light ◽  
White Cement ◽  
Materials Used ◽  
White Portland Cement ◽  
Chromatic Coordinates

The building materials used as a coating on the walls are exposed at different conditions of the weather for long periods of time, reason why is very important to determine the effects of sunlight, heat, humidity and other effects of climate change in the colour and the properties of these materials. In this work was carried out a study on the behaviour of colour and gloss of white cement with some different industrial waste additions submitted to ultra-violet light exposure. The addition of the different materials employed in this work does not modify lightness or chromatic coordinates after the exposure at ultraviolet light, however reduces significantly the gloss of the samples, including white Portland cement.

Effects Of Ultra Violet Light Exposure on Gated Sillicon Field Emitter Arrays

2021 ◽  
Author(s):  
Ranajoy Bhattacharya ◽  
Mason Canon ◽  
Nedeljko Karaulac ◽  
Girish Rughoobur ◽  
Winston Chern ◽  
...  
Keyword(s):  
Light Exposure ◽  
Ultra Violet ◽  
Field Emitter ◽  
Ultra Violet Light ◽  
Violet Light ◽  
Field Emitter Arrays

Confinement Of Myosin Motor Activity On Trimethylchlorosilane Surface By Ultra Violet Light Exposure For Nano-Technology Applications

2008 ◽  
Vol 40 (Supplement) ◽  
pp. S297
Author(s):  
Madhukar B. Kolli ◽  
Hideyo Takatsuki ◽  
Devashish Desai ◽  
Kevin M. Rice ◽  
Sunil Kakarla ◽  
...  
Keyword(s):  
Motor Activity ◽  
Light Exposure ◽  
Ultra Violet ◽  
Nano Technology ◽  
Ultra Violet Light ◽  
Myosin Motor ◽  
Violet Light ◽  
Technology Applications

scholarly journals THE ABIOTIC ACTION OF ULTRA-VIOLET LIGHT

1917 ◽  
Vol 26 (6) ◽  
pp. 841-848 ◽  
Author(s):  
H. S. Newcomer
Keyword(s):  
Ultraviolet Light ◽  
Photographic Plate ◽  
Ultra Violet ◽  
Ultra Violet Light ◽  
Violet Light

Typhoid bacilli are about one two-hundredth as sensitive to ultraviolet light of wave-lengths 2100 to 2800 Ångström units as is the photographic plate. This sensitivity then falls off, decreasing rapidly to almost zero sensitivity at about 2970, the beginning of the sun's spectrum.

Research of Properties of Modern Construction Materials Based on Industrial Waste, Waste Wood and Metallurgical Industries

2019 ◽  
Vol 802 ◽  
pp. 113-124
Author(s):  
Ruslan Aharonovich Abramov ◽  
Maksim Sergeevich Sokolov ◽  
Svetlana Vyacheslavovna Derevianko
Keyword(s):  
Industrial Waste ◽  
Building Materials ◽  
Raw Materials ◽  
Construction Materials ◽  
Raw Material ◽  
Total Output ◽  
Material Consumption ◽  
Waste Wood ◽  
New Construction ◽  
Materials Used

Material consumption of production of building materials is determined by the amount of raw materials used for their production, to the total output. One of the ways to reduce material consumption is the use of industrial waste as the main raw material for the production of new construction products. Most of the waste generated as a result of the activities of enterprises are man-made raw materials for the production of products such as brick, lime, cement, etc.Given that man-made raw materials are similar to the natural composition and physical properties and even has a number of advantages (heat treatment, increased dispersion, etc.), the manufacture of building materials from it is usually profitable and justified [4, 5].

scholarly journals The propagation of active-passive interfaces in bacterial swarms

2018 ◽  
Author(s):  
Alison E. Patteson ◽  
Arvind Gopinath ◽  
Paulo E. Arratia
Keyword(s):  
Light Exposure ◽  
Ultra Violet ◽  
Diffuse Interface ◽  
Interfacial Velocity ◽  
Active Systems ◽  
Violet Light ◽  
Interface Growth ◽  
Matter System ◽  
Interface Curvature ◽  
Physical Principles

Propagating interfaces are ubiquitous in nature, underlying instabilities and pattern formation in biology and material science. Physical principles governing interface growth are well understood in passive settings; however, our understanding of interfaces in active systems is still in its infancy. Here, we study the evolution of an active-passive interface using a model active matter system, bacterial swarms. We use ultra-violet light exposure to create compact domains of passive bacteria withinSerratia marcescensswarms, thereby creating interfaces separating motile and immotile cells. Post-exposure, the boundary re-shapes and erodes due to self-emergent collective flows. We demonstrate that the active-passive boundary acts as a diffuse interface with mechanical properties set by the flow. Intriguingly, interfacial velocity couples to local swarm speed and interface curvature, suggesting that an active analogue to classic Gibbs-Thomson-Stefan conditions controls boundary propagation. Our results generalize interface theories to mixing and segregation in active systems with collective flows.

TRADITIONAL OUTBUILDINGS OF THE MORDOVIANS

2019 ◽  
Vol 15 (2) ◽  
pp. 154-165 ◽  
Author(s):  
Elena N. Mokshina ◽  
Mihail I. Svyatkin
Keyword(s):  
Ethnic Group ◽  
Economic Activity ◽  
Building Materials ◽  
Animal Feed ◽  
Economic Activities ◽  
Important Place ◽  
Main Building ◽  
Genetic Problem ◽  
Materials Used ◽  
Functional Purpose

Introduction. The article deals with the main traditional outbuildings of the Mordvinians, reported on their functional purpose in economic activity. The forms and types of outbuildings, as well as the main building materials used by Mordvinians are described in details. Their significance in the religious and ceremonial life of the ethnic group is shown. Materials and Methods. The research is based on traditional methods of ethnographic science, such as field observation, survey and interviews, and a comprehensive approach. Among the methods of historical science comparative-historical, historical-genetic, problem-chronological, structural-system were used. Among the general scientific methods of research logical, descriptive, narrative, generalization, classification and systematization were involved. To achieve the results of the study, the materials collected by the authors in the course of field surveys conducted in the Mordovian villages were mainly used. Results and Discussion. Traditional outbuildings were of great importance in the economic activity of the Mordovian ethnic group. According to their functional purpose, they can be divided into the following groups: for livestock and poultry (stable, chicken coop, stable, kalda), sanitary and hygienic (bath), warehouse buildings for storage of food, utensils, firewood, animal feed (barn, cellar, woodshed, hayloft), for processing of grain (sheep, riga, mill). Depending on the welfare and financial capacity of the family, the number of outbuildings was different. As a rule, the wealthier families had more outbuildings than the less wealthier ones. The main building material for the construction of these buildings was wood. Conclusion. Thus, the traditional outbuildings of the Mordvinians occupied an important place in its economic activities. At the same time, each of them had its own purpose and performed certain functions. Some buildings, such as a bath and a barn, had not only economic purpose, but also were the venue for a number of prayers and ceremonies. It is now ordinarily they have banya (bath-house), outdoor courtyard with standing in different places sheds, barn and cellar.

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