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Letteratura scientifica selezionata sul tema "Rutile – Research"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 18 febbraio 2022

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Articoli di riviste sul tema "Rutile – Research"

Karelin, V. A., A. N. Strashko, A. V. Dubrovin e A. V. Sazonov. "Research of Fluorination Process of Rutile Concentrate". Procedia Chemistry 11 (2014): 56–62. http://dx.doi.org/10.1016/j.proche.2014.11.011.

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Wu, Dao Xin, Zhou Lan Yin, Qi Yuan Chen, Jie Li e Ke Long Huang. "Research on Visible Light Photocatalytic Performance of Tungsten Doped TiO₂". Advanced Materials Research 236-238 (maggio 2011): 399–402. http://dx.doi.org/10.4028/www.scientific.net/amr.236-238.399.

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In this paper, W-doped rutile titania was prepared by low temperature hydrolysis using Tetrabutyl titanate. Powers were characterized by XRD、DRS、PL. At 1073K, Doped concentration have been in a certain range, Tungsten could be doped into the lattice of rutile TiO2in the way of replacement, which would cause no change in rutile TiO2crystalline state with sunlight as the light source, pH=2.0, catalyst concentration was 1.0g.L-1, concentration of methyl orange was 5.0mg.L-1. It has been shown that Tungsten doped TiO2powders(1.0%,1073K) has been the most photodegradation efficiency, and the degradation efficiency was 96.8% after 12h.

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Qi, Xue Mei, Xin Yuan Zhu, Jiang Wu, Yu Wu e Han Cheng Luo. "Sol-Gel Synthesis and Characterization of TiO₂-Based Photocatalyst and its Photoactivity Research". Advanced Materials Research 864-867 (dicembre 2013): 613–16. http://dx.doi.org/10.4028/www.scientific.net/amr.864-867.613.

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The TiO2-based photocatalysts have been synthesized by using sol-gel process and their photocatalytic activities were studied by the degradation of methylene blue (MB). It was shown that the calcination temperature has great influence on the crystalline phase transition of TiO2. For all the samples (Ag-doped and undoped TiO2photocatalysts) calcined at 573K, only anatase phase was observed from XRD diffraction spectra and the intensity of peaks is weak. After the calcined at 773K, a mixture of anatase-rutile phase appeared. The contents of rutile phase were about 85% and77% for undoped and Ag-adopted TiO2photocatalysts.There were only rutile phases for all the TiO2photocatalysts calcined at 973K observed from XRD diffraction spectra. Magnetically stirring time of A solution before added B had no obvious effects on the polymorphs transition of TiO2.

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Corfu, F., e A. J. Andrews. "A U–Pb age for mineralized Nipissing diabase, Gowganda, Ontario". Canadian Journal of Earth Sciences 23, n. 1 (1 gennaio 1986): 107–9. http://dx.doi.org/10.1139/e86-011.

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Concordant baddeleyite and rutile analyses from mineralized Nipissing diabase at Gowganda's Castle mine yield a U–Pb age of [Formula: see text]. Baddeleyite is a primary phase of the diabase; therefore the age dates the magmatic emplacement. The genesis of rutile is less certain: rutile could have formed during an episode of alteration, veining, and Ag mineralization, in which case the U–Pb age would also date the secondary event and demonstrate that Ag mineralization was related to the Nipissing magmatism. However, a primary magmatic origin of the rutile cannot be completely excluded for now; thus the U–Pb age may not constrain the time of Ag mineralization. Further research is needed to clarify this point.

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Kim, Na Yeon, Hyeon Kyeong Lee, Jong Tae Moon e Ji Bong Joo. "Synthesis of Spherical TiO2 Particles with Disordered Rutile Surface for Photocatalytic Hydrogen Production". Catalysts 9, n. 6 (28 maggio 2019): 491. http://dx.doi.org/10.3390/catal9060491.

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One of the most important issues in photocatalysis research has been the development of TiO2-based photocatalysts that work efficiently under visible light conditions. Here, we report the monodispersed, spherical TiO2 particles with disordered rutile surface for use as visible-light photocatalysts. The spherical TiO2 particles with disordered surface were synthesized by sol-gel synthesis, followed by sequential calcination, and chemical reduction process using Li/Ethylenediamine (Li/EDA) solution. Variation of the calcination temperature allowed the crystalline properties of the calcined TiO2 samples, such as the ratio of anatase and rutile, to be finely controlled. The content ratios of anatase phase to rutile phase leads to different degrees of disorder of the rutile surface, which is closely related to the photocatalysis activity. Chemical reduction using the Li/EDA solution enables selective reduction of the rutile surface of the calcined TiO2, resulting in enhanced light absorption. As a result, we were able to synthesize spherical TiO2 photocatalysts having a disordered rutile surface in a mixed crystalline phase, which is beneficial during photocatalysis in terms of light absorption and charge separation. When used as photocatalysts for hydrogen production under solar light conditions, the chemically-reduced TiO2 particles with both the disordered rutile surface and mixed crystalline phase showed significantly enhanced catalytic activity.

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Li, Li, Xiao Cui Guo e Yong Yan Zhou. "The Research of Chemical Resistance for Air Curing FEVE Fluorocarbon Coatings". Advanced Materials Research 239-242 (maggio 2011): 944–48. http://dx.doi.org/10.4028/www.scientific.net/amr.239-242.944.

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This study aims at analyzing the chemical resistance of a wide range additives in air curing ﬂuorocarbon coatings. Scanning Electron Microscope (SEM) and Immersion tests are used to detect coatings performances. The results showed that the surface state of coating does not affect the chemical resistance. While fumed SiO2 content in the coating is lower than 5.2%, chemical resistance are enhanced as the increasing of fumed SiO2 content, then maintained stability as content is more than 5.2%. Chemical resistance is increased gradually while the rutile TiO2 content of coating is less than 3.1%, and essentially unchanged while greater than 3.1%. As wax powder content increases, chemical resistance of coating decreased. Coupling agent content increases, leading to enhanced chemical resistance of the coating when coupling agent content is less than 5.8% and maintained stable while greater than 5.8%. So fumed SiO2, rutile TiO2, and coupling agent would inhance chemical resistance for coating to a certain extent, and wax powder would weaken the chemical resistance.

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Duan, Hai Ting, Qing Lin Hou e Yue Jin Liu. "Study of Uniform Design in the Optimizing Preparation Technology of the Rutile Titanium Dioxide Ternary Inorganic Coated". Applied Mechanics and Materials 329 (giugno 2013): 122–26. http://dx.doi.org/10.4028/www.scientific.net/amm.329.122.

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This paper researched the inorganic coated the rutile titanium dioxide process, a new inorganic coating (The rutile titanium dioxide ternary Inorganic coated were prepared by sol-gel method). The regression equation and the optimum conditions are founded by uniform design and the systemetical research of various factors on the properties of the rutile titanium dioxide ternary Inorganic Coated. Effect of The rutile titanium dioxide ternary Inorganic coated were characterized by nanoZS, Fourier infrared spectroscopic analysis (FT-IR) with NH3 as atom probe, scanning electron microscopy (SEM), transmission electron microscopy (TEM). The optimized formula of preparing the rutile titanium dioxide ternary inorganic coated is that the dispersant of 0.20%, the ZrO2 content of 0.6%, the SiO2 content of 3.0%, the Al2O3 content of 1.6%, the rotate speed of 340r/min when system temperature was 60°C-65°C, the seriflux concentration was 300g/L, the PH of the coated ZrO2 was 8.5-9.0, the PH of the coated SiO2 was 9.5-10.0, the PH of the coated Al2O3 was 6.0-6.5.

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Ackerson, Michael R., e Bjørn O. Mysen. "Experimental observations of TiO2 activity in rutile-undersaturated melts". American Mineralogist 105, n. 10 (1 ottobre 2020): 1547–55. http://dx.doi.org/10.2138/am-2020-7391.

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Abstract An estimate of TiO2 activity (aTiO2melt-sat) is necessary for the application of trace-element thermobarometry of magmatic systems where melts are typically undersaturated with respect to rutile/anatase. Experiments were performed in the system SiO2-Na2O-TiO2 to develop two independent methods of estimating aTiO2melt-sat—one based on the commonly applied rutile-saturation technique and another utilizing a novel Ti-in-tridymite thermometer. It is demonstrated that the rutile-saturation model can lead to an overestimate of aTiO2melt-sat relative to TiO2 activity calculated using the solubility of Ti in tridymite (SiO2) coexisting with rutile. Overestimation via the rutile-saturation technique is due to variations in the solubility mechanisms of Ti in the melt phase as a function of Ti content. In natural systems, overestimates of aTiO2melt-sat will lead to an underestimation of crystallization temperatures by Ti-based trace-element thermobarometers. Although this study is not directly applicable to natural systems, it lays the groundwork for future research on natural composition magmas to constrain TiO2 activity in melts.

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Li, Liang, e Lan Hua Zhou. "Technology Research on the Fluidization Treatment of High-Titanium Slag to Manufacture Synthetic Rutile". Applied Mechanics and Materials 397-400 (settembre 2013): 62–72. http://dx.doi.org/10.4028/www.scientific.net/amm.397-400.62.

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Oxidation and reduction of high-titanium slag were conducted in a self-designed fluidized bed. Detailed analyses of the leaching mechanism and kinetics were also performed. The effects of oxidation temperature, oxidation time, reduction temperature, and time on leaching products and on the leaching behavior of impurity were systematically investigated via conditional tests. The optimal conditions of the conditional tests are as follows: oxidation temperature of 1,0001,100°C, oxidation time of 3070 min, reduction temperature of 700800°C, and reduction time of 90150 min. Scanning electronic microscope and X-ray diffract analyses show that the phase structure of the high-titanium slag changed after fluidizing oxidation and reduction, which is when a major phase of the high-titanium slag was changed from pseudobrookite to rutile. The change had an important role on pulverization ratio reduction and on the creation of a new technology route for the use of titanium resource in Panzhihua in manufacturing synthetic rutile.

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Zhao, Pengsen, Guifa Li, Bingtian Li, Haizhong Zheng, Shiqiang Lu e Ping Peng. "Evolution Mechanism of Metallic Dioxide MO2 (M = Mn, Ti) from Nanorods to Bulk Crystal: First-Principles Research". Journal of Nanomaterials 2018 (2018): 1–14. http://dx.doi.org/10.1155/2018/9890785.

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Using first-principle calculations, the surface energy, cohesive energy, and electronic properties of α-MnO2 and rutile TiO2 nanorods and microfacets were investigated and clarified to, in the first instance, determine the evolution mechanism. The results show that the surface energies of α-MnO2 nanorods and microfacets conform to function 1.0401 Jm−2 + N × 0.608 Jm−2, while the surface energies of the rutile TiO2 nanorods and microfacets are governed by a 1.0102 × 1.1997 rule. Their electronic properties, such as the Mulliken population and Mulliken charge, can only be normalized by their surface areas to attain a linear function. Meanwhile, the surface energy of α-MnO2 with the nanostructure closely conforms to the function for normalized Mulliken population and Mulliken charge as f(x)=102.9×x+0.101 with an R2 value of 0.995. Thus, our research into the evolution mechanism affecting the surface effect of nanometer materials will be useful for investigating the intrinsic mechanism of the nanometer effect and doping process of metallic dioxide catalysts.

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Più fonti

Tesi sul tema "Rutile – Research"

Assane, Ali Ossufo. "Distribution of heavy minerals sand in Namalope deposit, Moma district, Mozambique". Thesis, Rhodes University, 2014. http://hdl.handle.net/10962/d1012169.

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The spatial distribution of heavy minerals along the mine paths 2014 and 2015 at the wet concentrate plant B shows an increase of heavy minerals sand concentration northwards and slime contents southwards, and it is commonly associated with depth and grain sorting; the increase of heavy minerals concentration with depth is considered to be from the surface formed by Unit 6 to the bottom of Unit 7. The Unit 82 is characterized by low heavy minerals concentrations and high slime contents declining northwards. The mineral proportion estimation suggests that ilmenite is the most abundant heavy mineral in the entire area followed by zircon, rutile and mozanite, and some accessory minerals such as chromite, kyanite, staurolite, tourmaline, epidote, spinel and quartz. The ilmenite occurrence is divided into ilmenite low (< 53% TiO₂) and high (> 53% TiO₂); the ilmenite high with zircon and rutile shows tendency to increase northwards while ilmenite low increase southwards. Zircon, monazite, rutile, chromite, kyanite and staurolite show low variability, which is probably associated with high resistance of minerals for abrasion during transportation and diagenesis. The depositional model of the Namalope deposit, in the flat area and wet concentrate plant B in particular, suggests deposition in a shallow marine environment associated with regression for deposition of Unit 6, 7 and 9 and transgression during deposition of Unit 82. The spatial distribution of heavy minerals in the Namalope deposit and its environment of deposition are the key points for discovery of new deposits around the Namalope with the same characteristic of mineral assemblage and they are used for mine strategic plans such as update block model and mine design.

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Ragnarsson, Sofie, e Sandra Brask. "Flykt från en verklighet till en annan : En jämförelse av rutiner mellan fyra boenden för ensamkommande flyktingbarn". Thesis, Örebro University, School of Law, Psychology and Social Work, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-9799.

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Titel: FLYKT FRÅN EN VERKLIGHET TILL EN ANNAN. EN JÄMFÖRELSE AV RUTINER MELLAN FYRA BOENDEN FÖR ENSAMKOMMANDE FLYKTINGBARN

Författare: Brask, Sandra

Ragnarsson, Sofie

Handledare: Drugge, Gunnel

Örebro universitet

Akademin för juridik, psykologi och socialt arbete

Socionomprogrammet

Socialt arbete 21-40 poäng

C-uppsats, 15 poäng

Ht 2009

Sammanfattning

Under 2008 kom 1510 flyktingbarn och ungdomar till Sverige utan vårdnadshavare. Många kom från Irak och Afghanistan. Syftet med denna uppsats är att kartlägga och jämföra rutiner i verksamheten vid fyra ungdomsboenden för ensamkommande flyktingbarn. Frågeställning-arna handlar om vilka rutiner som finns kring introduktion, vardag, hälsa, fritidsaktiviteter, skola, socialt nätverk och identitetsutveckling. Utgångspunkt för analysen är Förenta Nation-ernas Konvention om Barnets Rättigheter, Randall Collins teori om interaktionsritualer samt tidigare forskning inom ämnet. Litteraturinhämtningen har skett främst utifrån artikeldata-baser. Resultaten har framtagits genom kvalitativ metod och semistruktureade intervjuer. Intervjumaterialet har behandlats utifrån ett fenomenologiskt betraktelsesätt. Följande har framkommit: I boendenas introduktion är vuxenstöd och tydlig information viktiga bestånds-delar. Vardagsrutinerna består av regler kring bl.a. basala mänskliga behov, hushållsgöromål och kommunikation. Gällande hälsa finns rutiner för hanteringen av fysiska besvär. Det psy-kiska måendet nämns dock huvudsakligen. Det finns rutiner kring individuella och gemen-samma fritidsaktiviteter. Beträffande skolan beskrivs rutiner kring skolstart, läxläsning och skolvägran. Kring ungdomarnas sociala nätverk finns rutiner för kontakt med släkt, vänner och gode män samt utökning av kontaktnätet. För vägledning inför bildandet av en vuxen identitet finns rutiner bl.a. för att motverka droganvändning och våld.

Nyckelord: ensamkommande flyktingbarn, ungdomsboenden, rutiner

Title: FLIGHT FROM ONE REALITY TO ANOTHER. A COMPARISON OF

ROUTINES BETWEEN FOUR YOUTH HOSTELS FOR UNACCOMPANIED ASYLUMSEEKING CHILDREN.

Authors: Brask, Sandra

Ragnarsson, Sofie

Supervisor: Drugge, Gunnel

Örebro university

School of law, psychology and social work

Social Work Program

Social work 21-40 points

C-essay, 15 points

Autumn term 2009

Abstract

In 2008 1510 refugee children and adolescents arrived in Sweden without their guardians. Many of them came from Iraq and Afghanistan. The purpose of this essay is to make a survey and compare the routines of four youth hostels for unaccompanied asylum-seeking children. The main issues concern routines in the fields of introduction, everyday life, health, leisure activities, school, social network and development of their identity. The basis of the analysis is The Convention on the rights of the child of The United Nations, Randall Collins theory of interaction rituals and research on the subject. The literature has in most part been collected from databases. The qualitative method and semi-structured interviews are used in the collection of the data. The interview material has been analysed using a phenomenological approach. The main findings are: In the introduction adult support and basic information are important components. The daily routines consist of guidelines about, e.g. basic human needs, household chores and communication. Concerning health there are routines in the field of physical ailments. The mental wellbeing is though more often mentioned. There are routines about individual and group activities. Regarding school routines about starting school, home-work and school refusal are described. In the matter of their social network there are routines for the contact with relatives, friends and legal guardians and extension of the network. To guide them on their way to an adult identity there are routines for e.g. the prevention of drugs and violence.

Keywords: unaccompanied refugee children, adolescents, youth hostels, routines.

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Nordin, Agnes, e Alexandra Maleki. "När hjulen sätts i rullning : En socialpsykologisk studie om individens upplevelse av sin identitet efter att ha blivit rullstolsburen". Thesis, University of Skövde, School of Technology and Society, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-4374.

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Syftet med studien är att skapa en ökad förståelse inom berörda yrkes- och studentgrupper för hur individer, som blivit rullstolsburna senare i livet, upplever sin identitet och eventuella identitetsförändringar. Resultatet tolkades utifrån Anthony Giddens teorier om senmodernitet och identitet samt Peter L. Berger och Thomas Luckmanns kunskapssociologiska perspektiv. Den tidigare forskningen har berört funktionshinder och identitet utifrån olika aspekter, dock har inte syftet för denna studie behandlats i sin helhet i andra studier. Semistrukturerade intervjuer genomfördes med sex stycken respondenter för att nå deras upplevelser. Utifrån det material som inkommit genom intervjuerna har åtta stycken kategorier framträtt: självbild, yttre attribut, vanor och rutiner, arbete och fritid, relationer, bemötande från andra, drömmar och planer samt handikappanpassning. I studien framkommer att respondenterna använder framträdande och uppträdande för att påverka den spegling de får av omgivningen. Studien visar även att det har skett en förändring av respondenternas regimer och rutiner. En identitetsförändring har därmed skett hos respondenterna. I studien diskuteras även det faktum att respondenterna själva inte framhåller den identitetsförändring som påvisas i studien. Detta tyder på att respondenterna inte själva tänker på förändringen i sig, de tänker mer indirekt på förändringen genom att denna påverkat dem i olika situationer. I studien framkommer även vikten av det omgivande samhällets attityd gentemot den funktionshindrade när det gäller speglingen av individen. Detta är av relevans för de instanser i samhället som arbetar med frågor rörande funktionshinder.

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Zoubková, Kateřina. "Redakce ČT sport bez šéfredaktora. Kde jsou její limity?" Master's thesis, 2020. http://www.nusl.cz/ntk/nusl-415422.

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This diploma thesis called ČT sport newsroom without an editor-in-chief. Where are its limits? focuses on the leadership of sports newsroom, which operated without editor-in-chief between the years 2013 and 2019. In January 2020 the sports department was reorganized thus there is the editor-in-chief at the head of the organization since then, who manages the organization in terms of journalism. The researcher paid attention to the analysis of both possible structures. In the theoretical part, the author describes possible organizational structures according to which the organization can be structured. She focuses on media routines and history and the presence of the sports newsroom, but she is mostly targeting the hierarchy of the department. The empirical part is based on 14 in-depth interviews with workers of the newsroom, who describe how the sports department works and point out the positives and negatives of the system. The research took place in two phases. The first one before the restructuring of the department, the second one a few months after. The result is, how the sports newsroom according to its employees worked in this kind of atypical structure.

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Jílková, Veronika. "Vliv webové analytiky na novinářskou práci". Master's thesis, 2020. http://www.nusl.cz/ntk/nusl-435489.

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This Master's thesis entitled "The Influence of Web Analytics on Journalism" examines the impact of web analytics on journalistic routines in the Czech Republic. The theoretical frame focuses on history of origin and development of czech online news media as well as the change of journalistic work in the environment of online media. An inseparable part of the theoretical section is also an introduction to the topic of editorial analytics. The theory of gatekeeping frames our research and helps us define specific research questions. Qualitative research was conducted using semi-structured in-depth interviews with ten journalists to answer the research questions. Results showed who is in charge of editorial analytics in newsrooms and how often are analytical tools used. Then the purpose of usage of editorial analytics was found and described in the interpretative part. In conclusion the results provided us with detailed information about the specific impact of analytics on journalistic routines including appearance of home pages, headlines and photos, selection of topics, links to other articles etc. The key findigs of this research were enriched by conclusions of similar foreign studies.

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Capitoli di libri sul tema "Rutile – Research"

Yamada, Y., S. Tsuneyuki e Y. Matsui. "Pressure-Lnduced Phase Transitions in Rutile-Type Crystals". In High-Pressure Research: Application to Earth and Planetary Sciences, 441–46. Washington, D. C.: American Geophysical Union, 2013. http://dx.doi.org/10.1029/gm067p0441.

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Syono, Yasuhiko, Keiji Kusaba, Masae Kikuchi, Kiyoto Fukuoka e Tsuneaki Goto. "Shock-induced phase transitions in rutile single crystal". In High‐Pressure Research in Mineral Physics: A Volume in Honor of Syun‐iti Akimoto, 385–92. Washington, D. C.: American Geophysical Union, 1987. http://dx.doi.org/10.1029/gm039p0385.

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Matsui, Yoshito, e Shinji Tsuneyuki. "Molecular Dynamics Study of Rutile-CaCl2-Type Phase Transition of SiO2". In High-Pressure Research: Application to Earth and Planetary Sciences, 433–39. Washington, D. C.: American Geophysical Union, 2013. http://dx.doi.org/10.1029/gm067p0433.

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Müller, A., e C. Halls. "Rutile — the tin-tungsten host in the intrusive tourmaline breccia at Wheal Remfry, SW England". In Mineral Deposit Research: Meeting the Global Challenge, 441–44. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/3-540-27946-6_115.

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Denghong, Wang, Li Hua-qin, Chen Yuchuan, Xu Jue, Yu Jinjie, Chen Zhenyu e Wang Ping’an. "Lead isotopic composition of rutiles from the Chinese continental scientific drill (CCSD) hole and its genetic significance for the superlarge rutile deposit in Maobei, Jiangsu Province". In Mineral Deposit Research: Meeting the Global Challenge, 69–72. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/3-540-27946-6_18.

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Zhenyu, Chen, Chen Yuchuan, Wang Denghong, Xu Jue e Zhou Jianxiong. "Rutiles in eclogite from the Sulu UHPM Terrane: A preliminary study". In Mineral Deposit Research: Meeting the Global Challenge, 731–33. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/3-540-27946-6_186.

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Atti di convegni sul tema "Rutile – Research"

Teferi, Blen, Udo Schnupf, Kazuhiro Manseki, Takashi Sugiura e Saeid Vafaei. "Synthesis and Deposition of Rutile TiO2 for Dye-Sensitized Solar Cell Applications". In ASME 2019 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/imece2019-11035.

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Abstract The purpose of this research was to produce semiconductor Rutile TiO2 films using a new deposition method on F-doped SnO2 (FTO) glasses i.e. nanofluid boiling method, using TiO2 nanoparticles. A low-temperature synthesis without using conventional hydrothermal methods was established to obtain the Rutile TiO2 nanoparticles with different size and shape under different temperatures. The crystalline TiO2 was separated from the reaction liquid by centrifugation and dried under ambient condition. The current boiling deposition of the TiO2 nanofluid was found to form porous semiconductor TiO2 nanoparticle films without cracks in the deposited TiO2 film. The obtained TiO2 films will be utilized as TiO2 photoanodes in dye-sensitized solar cells.

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Ishikawa, Junzo. "Nanoparticle Formation in Surface Layer of Oxide Materials and Improvement of Photocatalytic Properties of Rutile Titanium Dioxide". In APPLICATION OF ACCELERATORS IN RESEARCH AND INDUSTRY: 17TH International Conference on the Application of Accelerators in Research and Industry. AIP, 2003. http://dx.doi.org/10.1063/1.1619797.

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Eddiouane, A., H. Chaib, A. Nafidi, M. Najjaoui e T. Ait-Taleb. "First principles investigation of electronic properties and high refractive index of rutile TiO2 for photovoltaic applications". In 1ST INTERNATIONAL CONGRESS ON SOLAR ENERGY RESEARCH, TECHNOLOGY AND APPLICATIONS (ICSERTA 2018). Author(s), 2018. http://dx.doi.org/10.1063/1.5084978.

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Yusoff, M. M., M. H. Mamat, M. F. Malek, A. S. Ismail, S. A. Saidi e M. Rusop. "Low temperature growth of rutile titanium dioxide nanorod arrays using a novel facile method for UV photosensor application". In 2016 IEEE Student Conference on Research and Development (SCOReD). IEEE, 2016. http://dx.doi.org/10.1109/scored.2016.7810070.

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Pessoa, Ezequiel C. P., Leandro F. Ribeiro, Alexandre Q. Bracarense, Weslley C. Dias, Luciano G. D. Andrade, Stephen Liu, Valter R. Santos e Mauri´cio J. Monteiro. "Arc Stability Indexes Evaluation on Underwater Wet Welding". In ASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/omae2010-20876.

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Underwater wet welding (UWW) with shielded metal arc welding (SMAW) is employed basically in repairs of offshore structures, including platforms, ships and others. The main problems of this type of welds are related, of course, with water presence in the electric arc that causes higher cooling rates, Oxygen and Hydrogen availability in the arc atmosphere and arc instability. Many of research and test welding programs in laboratory are undertaken in shallow water performed by automatic devices using hyperbaric chambers to simulate depths. Also, welding arc signals are acquired using data acquisition systems and the arc stability is estimated through indexes calculated from values acquired and analyzed. It is very well known the reduced stability of the wet welding process at shallow depths — less than approximately five meters. So this effect would be considerable significant since it can be used to make correlations between the arc stability indexes and the welds quality results. The main objective of this work was to evaluate the efficiency of the most used arc stability indexes reported in the literature in detect the arc instability effect of shallow water wet welding. Bead-on-plate welds had been made using a gravity feeding system device inside a hyperbaric chamber, applying straight polarity (DCEN) in ASTM A36 steel plates, using the same weld parameters in two different depths, 0.5 and 20.0 meters. Rutile, basic and oxidizing commercial electrodes types prepared for UWW with 3.25mm rod diameter were used. Visual analysis, bead morphology and arc stability were the criteria used to evaluate the weld quality. The voltage and current arc signals were acquired at 10 KHz rate. The arc stability indexes measured were average voltage and current and its standard deviation, S (Imax/Imin) parameter, voltage and current square mean, arc “re-ignition” voltage and current, metal transfer time and its deviation, metal transfer frequency and its deviation, short circuit time and its deviation and the voltage versus current graph area. The results shown that none of the stability indexes tested has been shown to indicate, alone, a good relationship to the surface appearance obtained for the three electrodes studied. The rutile type electrode was the only one that clearly produced better weld appearance at 20 meters than in shallow water depth. The rutile and oxidizing electrodes showed better surface appearance with the increased number of short circuits. For the rutile electrode, the globular transfer mode with high voltage were directly related with poor weld bead surface appearance.

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Hadžic, Svetlana, Alma Mičijevic e Vedrana Komlenr. "UTICAJ AGROEKOLOŠKIH USLOVA I FAZA RAZVOJA HELJDE (Fagopyrum esculentum Moench) NA SADRŽAJ RUTINA". In SAVETOVANJE o biotehnologiji sa međunarodnim učešćem. University of Kragujevac, Faculty of Agronomy, 2021. http://dx.doi.org/10.46793/sbt26.113h.

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The analysis of the content of rutine in buckwheat (Fagopyrum esculentum Moench) was performed under the influence of agroecological factors in the area of Nišićka Visoravna (Sarajevo) during 2019. A field experiment in which the content of rutines in different development phenophases of buckwheat (beginning of flowering, full flowering, maturation) was set up and analyzed. Fresh plant material was used for analysis, and the hydrolate production process was carried out by steam distillation. The distilled buckwheat solution was analyzed by HPLC method at the Institute of Agromediterranean Faculty in Mostar. The highest content of rutine in the research period was recorded in the developmental phase of full flowering 28 mg/100 g, in the phase of maturation it is 21 mg/100 g and the lowest content was found in the phase of the beginning of flowering 19 mg/100 g.

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Ramczyk, Marek. "Application of Econometric Model for Water Economy Management". In Environmental Engineering. VGTU Technika, 2017. http://dx.doi.org/10.3846/enviro.2017.042.

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The econometric model can be a precise instrument for the analysis of the impact of the natural environmental degradation on the fishing economy. This paper aims at analysing the influence of the water quality changes in Charzykowskie Lake on the fishing economy. The economic-ecological models have been constructed, explaining the changes of economic effects of the lake fishery in the conditions of an increasing water pollution in the hypolimnion on the example of the catch of Rutilus rutilus, Blicca bjoerkna, Coregonus lavaretus, Anguilla anguilla and Esox lucius in Charzykowskie Lake. Performed empirical research focuses on the influence of the environmental factors on the size of fish catch. Calculations and analysis show clearly that even though the habitat factors have an influence on the catch size of each studied fish species, they do it with different intensity and in various combinations. Both, lake water quality and climate factors changes, cause measurable effects on fishing industry of Charzykowskie Lake. Among the examined Rutilus rutilus and Blicca bjoerkna, Blicca bjoerkna has the highest high environmental requirements regarding the water quality. Empirical calculations showed as well that Coregonus lavaretus has considerably higher water cleanness requirements than Rutilus rutilus and Blicca bjoerkna. While considering Rutilus rutilus and Blicca bjoerkna, most water characteristics still rather stimulate a development of these species, but when it comes to Coregonus lavaretus, in general they suppress its development. The model has also proved quite high habitat requirements for Anquilla anquilla and correctness of the thesis that Esox lucius avoids polluted water. Climatic factors influence is significant for the endogenous variables. The above prejudges the itineration of Rutilus rutilus, Blicca bjoerkna, Coregonus lavaretus, Anquilla anquilla and Esox lucius catch in Charzykowskie Lake. The results of the modelling can be used in managing the fishing economy of the lake.

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