Relevant bibliographies by topics / SBF

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'SBF'

Author: Grafiati
Published: 4 June 2021
Last updated: 31 January 2023

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Journal articles on the topic "SBF"

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Dinata, Alharia. "IDENTIFIKASI KERENTANAN EROSI TANAH BERDASARKAN PARAMETER MORFOMETRI DI SUB DAS KIKIM." JURNAL ILMIAH BERING'S 7, no. 02 (October 5, 2020): 36–41. http://dx.doi.org/10.36050/berings.v7i02.275.

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Soil erosion is an environmental problem that occurs in many parts of the world because it involves ecological, social and economic aspects. Kikim sub-watershed is part of the Musi river area, most of the topographic conditions are flat slopes (54.64%), steep slopes with a total percentage of 12.81%. Meanwhile, hydrological conditions have a maximum daily rainfall with a high category so that the potential for erosion and flooding is very high. The purpose of this study was to identify soil erosion vulnerability based on morphometric parameters. The research data used DEM-SRTM 30 meters and then extracted into a map of the sub-watershed and river networks to calculate morphometric parameters. The method used was the weighted sum analysis (WSA) with a GIS application approach. The DEM data excavation found 11 (eleven) sub-watersheds with an area ranging from 81.26 km2 to 220.50 km2, and the total length of the river was 2221.24 km. Based on the weighted results of the WSA method, two sub-watersheds (SB3 and SB7) had very high soil erosion vulnerability, moderate soil erosion vulnerability in SB1, SB2, SB4, SB8, SB10, and SB11. Furthermore, the low soil erosion vulnerability (SB9), and very low soil erosion vulnerability were at SB5 and SB6. The results of this study could be used for conservation zone planning to control soil erosion.
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Sultana, S., Z. Yeasmin, S. Ahmed, HP Nur, and PR Samaddar. "Characterization and surface activity of soluble sulfonated butanone formaldehyde superplasticizer for cement." Bangladesh Journal of Scientific and Industrial Research 51, no. 2 (June 12, 2016): 155–58. http://dx.doi.org/10.3329/bjsir.v51i2.28113.

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Water soluble sulfonated butanone formaldehyde (SBF) polycondensate superplasticizer was prepared according to a conventional method. UV-Vis, IR and TGA analyses were performed to analyze the target compound. The surface activity was evaluated. It showed a little surface activity with respect to water as the surface tension decreased very little with increasing the concentration of SBF. Thus there results indicate that SBF behaves like a typical polycondensate superplasticizer such as sulfonated acetone formaldehyde (SAF).Bangladesh J. Sci. Ind. Res. 51(2), 155-158, 2016
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Upadhyay, R. K., and S. P. Mathur. "Effect of Schiff's Bases as Corrosion Inhibitors on Mild Steel in Sulphuric Acid." E-Journal of Chemistry 4, no. 3 (2007): 408–14. http://dx.doi.org/10.1155/2007/709516.

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Mass loss and thermometric methods have been used to study the corrosion inhibitory effect of synthesised Schiff's basesviz.N-(furfurilidine) – 4- methoxy aniline (SB1),N-(furfurilidine) – 4- methylaniline (SB2),N-(salicylidine) – 4- methoxy aniline (SB3),N-(cinnamalidine) – 4 –methoxy aniline (SB4) andN-(cinnamalidine) - 2-methylaniline (SB5) on mild steel in sulphuric acid solutions. Results show that both methods have good agreement with each other and inhibition efficiency depends upon the concentration of inhibitor as well as that of acid. Maximum inhibition efficiency is shown at highest concentration of Schiff's bases at the highest strength of acid.
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Saxena, N., S. Kumar, M. K. Sharma, and S. P. Mathur. "Corrosion Inhibition of Mild Steel in Nitric Acid Media by some Schiff Bases Derived from Anisalidine." Polish Journal of Chemical Technology 15, no. 1 (March 1, 2013): 61–67. http://dx.doi.org/10.2478/pjct-2013-0011.

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Corrosion inhibition performance of mild steel in nitric acid solution containing different concentration of anisalidine derivative Schiff bases viz. N- (4-nitro phenyl) p-anisalidine (SB1), N- (4-chloro phenyl) p-anisalidine (SB2), N- (4-phenyl) p-anisalidine (SB3), N- (4-methoxy phenyl) p-anisalidine (SB4), N- (4-hydroxy phenyl) p-anisalidine (SB5) has been investigated using mass loss, thermometric and potentiostate polarization technique. Inhibition efficiencies of Schiff bases have been evaluated at different acid strength. The inhibition efficiency was found larger than their parent amines. Inhibition efficiencies of synthesized Schiff bases increase with inhibitor concentration. Inhibition efficiency increases up to 98.32% with ansalidine derivative Schiff base.
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Fu, Shizuo, Richard Rotunno, and Huiwen Xue. "Convective updrafts near sea-breeze fronts." Atmospheric Chemistry and Physics 22, no. 11 (June 15, 2022): 7727–38. http://dx.doi.org/10.5194/acp-22-7727-2022.

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Abstract. Sea-breeze fronts (SBFs) are frequently found to trigger deep convection. The convective updrafts near the SBF are critical in this triggering process. Here, the size and strength of the updrafts near an idealized SBF are investigated with large-eddy simulations. A central focus of this study is to compare the updrafts near the SBF, which are substantially affected by the SBF, to the updrafts ahead of the SBF, which develop in a typical convective boundary layer. It is found that the updrafts near the SBF are larger than but have similar strength to the updrafts ahead of the SBF. The larger updrafts near the SBF are produced through the merger between the postfrontal streaky structures and the updrafts originating near the SBF. Lagrangian budget analysis of vertical momentum reveals that the dynamics experienced by the parcels constituting the updrafts near the SBF is almost the same as that ahead of the SBF, so that the strength of the updrafts near the SBF is similar to that ahead of the SBF. It is also found that when the environmental wind is not included, the size and strength of the updrafts near the SBF scale with the boundary-layer height and the convective velocity scale, respectively, like those in the typical convective boundary layer; however, when the environmental wind is included, the aforementioned scaling breaks down. The present results should also apply to other boundary-layer convergence lines similar to the SBF.
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Zhang, Yunlong, Mineo Mizuno, Masaaki Yanagisawa, and Hiroaki Takadama. "Bioactive behaviors of porous apatite- and wollastonite-containing glass-ceramic in two kinds of simulated body fluid." Journal of Materials Research 18, no. 2 (February 2003): 433–41. http://dx.doi.org/10.1557/jmr.2003.0055.

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Simulated body fluid (SBF) has been widely used for assessment of bioactivities of different materials. Those kinds of conventional SBF (C-SBF) have a higher Cl− concentration and a lower HCO3− concentration than those of human blood plasma. Therefore, a revised simulated body fluid (R-SBF), with ion concentrations including those of Cl− and HCO3− exactly equal to those of human plasma, was recently developed. Porous glass-ceramic was used as the testing material to evaluate the two kinds of SBF. Results showed that C-SBF is considered more active than R-SBF because the porous glass-ceramic had a higher apatite formation rate on its surface,while R-SBF is considered to simulate the human body fluid more precisely than C-SBF.
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Fovell, Robert G. "Convective Initiation ahead of the Sea-Breeze Front." Monthly Weather Review 133, no. 1 (January 1, 2005): 264–78. http://dx.doi.org/10.1175/mwr-2852.1.

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Abstract In earlier work, a three-dimensional cloud model was used to simulate the interaction between the sea-breeze front (SBF) and front-parallel horizontal convective rolls (HCRs), resulting in the SBF systematically encountering roll updrafts and downdrafts as it progressed inland. Interestingly, deep convection was spawned above an HCR updraft ahead of the SBF as the front approached, well before the inevitable front–roll merger. Ostensibly, both the sea-breeze and roll circulations were required for deep convection to be present in this case at all because convection was entirely absent when either phenomenon was removed. Further analysis reveals why both circulations were necessary yet not sufficient for the excitation of deep convection in this case. The sea-breeze circulation (SBC) made its upstream (inland) environment more favorable for convection by bringing about persistent if gentle lifting over an extended region stretching well ahead of the SBF. This persistent ascent established a moist and cool tongue of air, manifested by a visible and/or subvisible cloud feature termed the cloud shelf emanating ahead of the front. Though this lifting moistened and destabilized the environment, the roll’s direct and indirect effects on this moist tongue were also required. The former consisted of a moisture plume lofted by the roll updraft, and the latter consisted of obstacle effect gravity waves generated as the roll drafts penetrated through the top of the boundary layer, into the SBC-associated offshore flow farther aloft. These provided the missing spark, which led to rapid growth of cumulus above the roll updraft, drawing first from air located above the boundary layer. Once established, deep convection above the roll updraft modulated cloudiness above the approaching SBF, at first suppressing it but subsequently assuring its reestablishment and eventual growth into deep convection, again prior to the front–roll merger. This resulted from the influence of gravity waves excited owing to heating and cooling within the roll cloud.
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Anjos, Max, António Lopes, Andrews José de Lucena, and Francisco Mendonça. "Sea Breeze Front and Outdoor Thermal Comfort during Summer in Northeastern Brazil." Atmosphere 11, no. 9 (September 22, 2020): 1013. http://dx.doi.org/10.3390/atmos11091013.

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Characterizing the behaviour of the sea breeze phenomenon is the foremost factor in the reduction in the heat stress and the achievement of the pleasant environment in coastal cities globally. However, this seminal study shows that the Sea Breeze Front (SBF) development can be related to an increase in outdoor thermal discomfort in a northeastern Brazilian city during summer. We explored the relationship between SBF and thermal comfort conditions using in situ meteorological observations, the SBF identification method, local climate zones (LCZs) classification, and the Physiological Equivalent Temperature (PET) thermal comfort index. SBF days and Non-SBF days were characterized in terms of weather conditions, combining meteorological data and technical bulletins. SBF days included hot and sunny days associated with the centre of the Upper Tropospheric Cyclonic Vortices (UTCV). In contrast, Non-SBF days were observed in UTCV’s periphery because of cloudy sky and rainfall. The results showed that the mean temperature and PET in the SBF days were 2.0 °C and 3.8 °C higher, respectively, compared to Non-SBF days in all LCZ sites. The highest PET, of 40.0 °C, was found on SBF days. Our findings suggest that SBF development could be an aggravating factor for increasing heat stress of the people living in the northeastern coast of the Brazilian city, after SBF passage.
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Sica, Pietro, Aline Galvao, Francesco Scariolo, Carmelo Maucieri, Carlo Nicoletto, Cristiane Pilon, Paolo Sambo, et al. "Effects of Drought on Yield and Nutraceutical Properties of Beans (Phaseolus spp.) Traditionally Cultivated in Veneto, Italy." Horticulturae 7, no. 2 (January 26, 2021): 17. http://dx.doi.org/10.3390/horticulturae7020017.

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Beans are often grown in regions with climates that are susceptible to drought during the cultivation period. Consequently, it is important to identify bean accessions tolerant to drought conditions and assess the effect of drought on seeds’ nutraceutical properties. This study evaluated the effect of drought during different development stages (NES = never stressed; ALS = always stressed; SBF = stressed before flowering; SAF = stressed after flowering) on the yield and nutraceutical properties of six local bean varieties: Fasolo del Diavolo, Gialet, Posenati, Secle, D’oro, and Maron. Analysis of variance indicated that Gialet was not significantly affected by drought treatments, and Posenati under SBF and NES treatments had greater yields than under ALS and SAF treatments, whereas Secle under SBF produced 80% more seeds than under NES. Total phenols, antioxidant capacity, and calcium content were significantly different among the local varieties. Yield was significantly and positively correlated with seed calcium content and significantly and negatively correlated with protein, total phenols, and antioxidant capacity. The interaction between local varieties and treatment significantly affected seeds’ Zn content. Gialet and Maron seeds’ Zn contents were about 60 mg kg−1, almost double the average of commercial varieties. In summary, this study paves the way to the identification of potential bean varieties resistant to drought. Further molecular studies will help support these findings.
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Beranič Klopčič, Sabina, Irena Pribošič, and Tomaž Kosmač. "The Formation of an Apatite Coating on Y-TZP Zirconia Ceramics." Key Engineering Materials 330-332 (February 2007): 773–76. http://dx.doi.org/10.4028/www.scientific.net/kem.330-332.773.

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Apatite-forming ability on a zirconia surface was investigated using a conventional SBF (c-SBF), a 1.4 SBF (concentration of ions 1.4 times higher than in SBF) and a supersaturated Ca/P solution. After 5 days a small amount of hydroxyapatite was formed on the zirconia surface in the 1.4 SBF, whereas no apatite was detected on the zirconia surface exposed to the c-SBF for 5 days. In the supersaturated Ca/P solution some isolated clusters of hydroxyapatite were observed on the zirconia surface after only 2 hours, and after 27 hours of immersion time, the zirconia surface was homogeneously covered with hydroxyapatite. Some of the covered zirconia substrates were heat treated at 1050°C for 1 hour. The thermally treated and untreated samples were immersed in SBF for 7 and 14 days. The results confirmed that additional hydroxyapatite was formed in the SBF in both cases, regardless of whether the covered zirconia substrate was pre-heated or not.
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Dissertations / Theses on the topic "SBF"

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Zerlim, Anelisa. "Estudo da dissolução de vidros niobofosfato em água e em solução simuladora de fluído fisiológico." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/85/85134/tde-10102011-142406/.

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A busca pelo prolongamento da qualidade da vida tem incentivado o aparecimento de novos materiais. Vidros que possuem fosfato em sua composição têm encontrado um grande espaço em aplicações como biomateriais, e sua utilização como scaffolds pode ser promissora, pois além de sua estrutura ser mais próxima da parte mineral dos tecidos ósseos, eles são materiais com alta solubilidade em meios aquosos. Vidros niobofosfato foram estudados em trabalhos anteriores e provou-se que a adição de óxido de nióbio em vidros fosfato melhora sua durabilidade química. Há também estudos que revelam que o óxido de nióbio pode ser utilizado como biomaterial devido a sua biocompatibilidade. Neste trabalho determinou-se a taxa de dissolução de uma ampla faixa de composições de vidros niobofosfato em soluções aquosas, e em soluções simuladoras de fluído corpóreo (SBF), com diferentes condições de ensaio. Os vidros estudados neste trabalho com composições (32 - 37)P2O5 (2- 15)Nb2O5 (6-7)Na2O (46-53)CaO, % em mol, foram produzidos a partir da mistura e fusão dos precursores em forno elétrico na faixa de temperatura de 1300ºC - 1400ºC por 0,3h. Foram produzidos sete tipos de vidros com composições diferentes, tendo como base a variação do teor de óxido de nióbio. Os vidros foram submetidos a análises de citotoxicidade e foram considerados não citotóxicos. Análises por difração de raios X mostraram que os materiais são amorfos e não se observou a presença de fases cristalinas após imersão tanto em solução aquosa, quanto em SBF. A densidade dos vidros variou de 2,84 a 3,14 g/cm3 em função do teor de óxido de nióbio. Observou-se a perda de massa dos vidros imersos em água e em SBF a 37ºC por 21 dias, sendo que a taxa de dissolução é maior quanto menor o teor de nióbio. As taxas de dissolução também variam de acordo com as condições de imersão das amostras. Micrografias eletrônicas de varredura mostraram a superfície das amostras antes e após imersão. Observou-se a formação de trincas nas superfícies de algumas amostras, resultado da liberação de matéria para o meio lixiviante. Houve aparente formação de uma camada superficial em uma determinada composição. Análises por espectrometria de fluorescência de raios X por energia dispersiva (EDX) determinaram os teores dos elementos presentes nas composições dos vidros, antes e após as imersões. Observou-se a presença de Al2O3, resultado da contaminação do vidro pelo cadinho, e também uma variação significativa no teor de P2O5 causado pela volatilização do mesmo no processo de obtenção do vidro. A variação dos teores dos elementos na superfície de alguns vidros após os períodos de imersão é causada principalmente pela liberação preferencial de P, Na, Al. Os teores dos elementos P, Na, Nb e Ca foram determinados por EDX nas soluções aquosas utilizadas para os testes de lixiviação.
The need to extend and improve the quality of life is leading to the search of new materials. Glasses containing phosphorous in their compositions are considered biomaterials and can be used as scaffolds because they have a structure close to the mineral component of bone tissues, and present relatively high solubility in water. The chemical composition, morphology, and mechanical properties of bioactive glasses can be properly fit to allow bonding with bones. Niobium phosphate glasses have been previously investigated. The addition of niobium oxide improves the chemical durability of phosphate glasses, and they are considered biocompatible. In the present work the dissolution rate of a wide range of niobium phosphate glass compositions were determined in water and Simulated Body Fluid (SBF). The glass compositions were in the range (32 - 37)P2O5 (2-15)Nb2O5 (6-7)Na2O (46-53)CaO mol%, and they were prepared by melting reagent grade chemical compounds in the temperature range 1300ºC - 1400ºC for 0.3h in an electrical furnace. Seven different glasses were prepared. The glasses were considered non-toxic after performing cytotoxicity tests. No evidence of crystalline phases was observed on X-rays diffraction patterns before and after the corrosion tests. The glass densities are in the range of 2.84 - 3.14 g/cm3. The density increases as the amount of niobium oxide increases. A mass loss was determined after immersing glass samples in water and in SBF at 37ºC during 21 days. The dissolution rate decreases as the amount of niobium oxide increases. The dissolution rate depends on the immersion medium and conditions. Cracks on the glass surfaces were observed by scanning electron microscopy after the corrosion tests which are related to the material release from the glass surface to the liquid. There is also evidence of formation of a layer on the surface of a specific glass composition. The glass compositions were determined before and after the corrosion tests by X-ray Fluorescence Spectrometry (EDS). Aluminum was detected in the glass composition. This element is related to the contamination of the glass by the crucible used in the glass melting. A significant variation of the amount of P2O5 compared to the nominal composition was also noticed, due to the volatilization of phosphorous during the glass melting. The surface glass composition changes during the leaching tests in water or SBF because of the preferential release of P, Na, and Al. EDS was also used to determine the concentration of P, Na, Nb, and Ca in the leaching solution by using the dry drop method.
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Ročňáková, Ivana. "Korozní degradace hořčíkových slitin v SBF roztocích." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2012. http://www.nusl.cz/ntk/nusl-216843.

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Nowadays, magnesium alloys are used in many sectors of human activity, particularly in the aerospace and automotive industries, due to a combination of good mechanical properties and low density of magnesium. Recently, however, the attention is paid to the possibility of using magnesium alloys in the medical field, mainly due to the chemical properties of magnesium. The diploma thesis is focused on evaluating of the corrosion behavior of AZ31alloy and AZ61 alloys in SBF solutions that are solutions simulating body fluids. The alloys were subjected to immersion test in Hank’s solutions for time span from 24 to 1008 hours. The corrosion process was evaluated based on several factors: alloy composition, time and pH changes. The thesis also describes in detail the methodology for establishing magnesium and zinc by method of flame absorption spektrometry (F AAS). The determination of aluminum was carried out by atomic absorption spectrometry with electrothermal atomization (ET AAS).
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Halbig, Kari Michele. "Multiple roles for the zebrafish transcriptional activator SBF/Staf." Thesis, [College Station, Tex. : Texas A&M University, 2008. http://hdl.handle.net/1969.1/ETD-TAMU-2653.

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Slouková, Karolína. "Hodnocení elektrochemických charakteristik tvářených hořčíkových slitin typu Mg-Al-Zn." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2016. http://www.nusl.cz/ntk/nusl-240550.

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The aim of this master’s thesis is electrochemical characteristics evaluation of magnesium alloys. The theoretical part describes the properties of magnesium and its alloys and their corrosion characteristics. In the experimental part are presented results of corrosion resistance measurement of two types of wrought magnesium alloys. It was AZ31 and AZ61 magnesium alloys, which were measured in Hank’s solutions with addition of ions Ca2+ and Mg2+ (SBF+) and without addition of the ions (SBF). The solution temperature during the measurement was 37 ± 1 °C. The experiments were used electrochemical impedance spectroscopy (EIS) and potentiodynamic tests using linear polarization (LP). EIS measurements were done in times of 5 minutes, 1, 2, 4, 8, 12, 24, 48, 72, 96 and 168 hours. Potentiodynamic tests were only short-term and they started after 5 minutes of stabilization. Both methods were used for measuring the electrochemical characteristics of polished and ground surface of the samples. The most important measurement results were polarization resistance, corrosion potential and corrosion current density. The electrochemical measurements are used to estimate the chemical composition influence and alloy’s structure of the corrosion resistance.
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Baetz, Kristin Kitty. "Multiple levels of regulation of the G(1) transcription factor SBF." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0015/NQ53798.pdf.

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Balgová, Zuzana. "Syntéza a vlastnosti biokompozitních materiálů s potenciálním využitím v medicíně." Doctoral thesis, Vysoké učení technické v Brně. Fakulta chemická, 2014. http://www.nusl.cz/ntk/nusl-233381.

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Dizertační práce se zabývala syntézou a studiem kompozitních materiálů pro potenciální lékařské využití. Teoretická část je zaměřena na biomateriály, zejména na kompozity složené z polyvinylalkoholu a hydroxyapatitu(PVA/HA). Byly připraveny kompozitní membrány složené z polyvinylalkoholu s různým hmotnostním zastoupením hydroxyapatitu - 0%, 10%, 20%, 30%, 40% a 50%. Hydroxyapatit (HA) byl připraven srážecí metodou z hydrogenfosforečnanu amonného a tetrahydrátu dusičnanu vápenatého ve vodném alkalickém prostředí. Vzniklá suspenze se smísila s roztokem polyvinylalkoholu, který byl připraven rozpuštěním ve vodě o teplotě 85° C. Jednotlivé směsi byly odlity do formy a sušeny po dobu 7 dní při teplotě 30 ° C, vzniklé 0,5 mm tenké membrány byly analyzovány ATR-FTIR spektroskopií k identifikaci funkčních skupin v kompozitu, dále byla provedena XRD analýza. Zkouška tahem a TGA měření byly realizovány k určení vlivu HA na mechanické vlastnosti, respektive změnu tepelné odolnosti kompozitů ve srovnání s čistým PVA. Byla provedena zkouška bioaktivity v simulovaném krevním roztoku (SBF) po dobu 2h, 7 a 28 dnů. SEM byla použita k charakterizaci povrchové mikrostruktury biocompositních membrán před a po ponoření do SBF. Na povrchu testovaných membrán vznikla vrstva apatitu, která je charakteristická pro bioaktivní materiály. Bylo zjištěno, že s rostoucím množstvím HA částic docházelo ke vzniku aglomerátů v kompozitu, které vznikly mimo jiné jako důsledek růstu krystalů HA během sušení membrán. Bioaktivita rostla s delším působením SBF na vzorky.
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Derbel, Thameur. "Les anomalies dans les rentabilités boursières à la bourse de Paris : les effets EPR, taille, prix et volume de transaction." Paris 9, 1991. https://portail.bu.dauphine.fr/fileviewer/index.php?doc=1991PA090036.

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Les études antérieures aux Etats-Unis n'ont pas tranché la relation entre les anomalies EPR et taille. Cette étude réexamine ces deux effets sur une période relativement importante (1980-1990), en utilisant le modèle économétrique de Zellener (1962) en mettant l'accent sur les différences entre le mois de janvier et les autres mois de l'année. Les effets sont significatifs sur tous les mois de la période, en janvier et en dehors du mois de janvier. En revanche, l'effet taille n'est significativement positif en janvier que pour les sociétés à forte capitalisation. Un autre effet est également mis en évidence: des rentabilités anormales positives sont constatées pour les sociétés déficitaires quelle que soit la taille
The research undertaken in United States concerning the relation between stocks returns and the effects of size and earnings to price ratio (EPR) is not clear-cut. This study re-examines these two effects with a substantially longer sample period (1980-1990); both portfolio and seemingly unrelated regression tests from zellner (1962) and an emphasis on the important differences between January and other months. Over the entire period, the earnings yield effect is significant in both January and other months. Conversely, the size effects are significantly positive only in January for the largest firms. We also find evidence of consistently high returns for firms of all sizes with negative earnings
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Aguiar, Amanda Abati. "Avaliação do recobrimento biomimétrico em compósitos de alumina-zircônia texturizadas superficialmente com laser de femtossegundo." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/85/85134/tde-29042013-095446/.

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O principal objetivo deste trabalho foi estudar a influência do tratamento superficial com laser de femtossegundo em amostras de alumina e compósito de alumina-zircônia estabilizada com ítria para depósito e aderência de apatita. Os resultados obtidos mostraram que houve a formação de apatita sobre as superfícies das amostras que foram texturizadas com laser de femtossegundo e em seguida imersa em 1,5 SBF. Este método biomimético pôde, por conseguinte, tornar estas cerâmicas bioativas. Também houve a formação de apatita na superfície das amostras sem o tratamento a laser. Os efeitos da texturização na superfície para as diferentes cerâmicas e a influência do tempo de imersão em 1,5 SBF são discutidos, a fim de determinar a condição ótima para estimular a deposição e a adesão da apatita na superfície dos materiais. Finalmente, os resultados obtidos das diferentes análises são comparados. A adesão da hidroxiapatita é essencial para interação com o substrato e depende das propriedades das superfícies dos materiais. A qualidade desta adesão influenciará sua morfologia e a capacidade futura de osseointegração. As características de superfície dependem da química de superfície, energia de superfície e topografia de superfície. Geralmente, a reatividade de superfície e energia de superfície pode ser influenciada pelas características de molhabilidade, influenciando o desempenho de biomateriais. A adesão e crescimento da apatita depositada também é função da rugosidade superficial. O tratamento superficial com laser de femtossegundo melhora consideravelmente a adesão da apatita obtida pelo recobrimento biomimético nas superfícies dos materiais.
The main objective of this work was to study the influence of femtosecond laser surface treatment on samples of alumina and composite of zirconia-alumina yttria stabilized for deposit and adhesion of apatite. The results showed that there was apatite formation on the surfaces of the samples that have been textured with femtosecond laser and then immersed in SBF 1.5. This biomimetic method can therefore make these bioactive ceramics. There was also the formation of apatite in the samples without laser treatment. The effects of texturing surface for the different ceramics and the influence of immersion time in SBF 1.5 are discussed in order to determine the optimal conditions to promote the deposition and the adhesion of the apatite in the material`s surface. Finally, the results of the different analyzes are compared. The adhesion of hydroxyapatite is essential for interaction with the substrate and depends on the properties of material´s surface. The quality of this adhesion will influence their morphology and the future ability of osseointegration. The surface characteristics depend on the surface chemical, surface energy and surface topography. Generally, the reactivity of surface and the energy of surface can be affected by wetting characteristics influencing the performance of biomaterials. The adhesion and growth of apatite deposited is also a function of surface roughness. The femtosecond laser surface treatment greatly improves the adhesion of apatite obtained by biomimetic coating on the surfaces of materials.
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Pala, Prashna Jatindra. "Biochemical and biophysical characterisation of the Saccharomyces cerevisiae cell-cycle transcription factors, SBF and MBF." Thesis, University College London (University of London), 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.271258.

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Dutoit, Charles-Emmanuel. "Etude par résonance paramagnétique électronique des composés organiques (TMTTF)₂X (X=AsF₆,PF₆ et SbF₆)." Electronic Thesis or Diss., Aix-Marseille, 2016. http://www.theses.fr/2016AIXM4334.

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Ce travail de thèse porte sur l'étude par la résonance paramagnétique électronique (RPE) des sels à transfert de charge quasi-unidimensionnels (TMTTF)₂X (X=AsF₆, PF₆, SbF₆), matériaux modèles de chaînes de spins quantiques. Tout d'abord, nous avons examiné en onde continue et sur une large gamme de température et de fréquence, la phase d'ordre de charge déjà observée dans ces matériaux en dessous de la température TCO. Nous avons mis en évidence deux nouveaux phénomènes à T≺TCO: la rotation des axes principaux du facteur g et une modification structurale liée à un dédoublement de la maille cristallographique. Un calcul de chimie quantique a été réalisé à l'aide de la méthode DFT confirmant nos résultats expérimentaux. Dans la seconde partie de ces travaux de thèse, nous avons présenté les résultats obtenus par RPE en onde continue et en onde pulsée sur l'étude des défauts corrélés dans les systèmes à chaînes de spins. En onde continue, nous avons détecté pour la première fois une raie RPE fine à basse température, suggérant la présence de défauts corrélés ayant les caractéristiques de solitons. Les mesures par RPE pulsée nous ont permis d'observer les premières oscillations de Rabi de solitons piégés et de déterminer leur caractère robuste. Ces derniers résultats offrent une approche alternative aux qubits à base de spins pour le traitement de l’information quantique
This thesis focuses on the study by Electron Paramagnetic Resonance (EPR) of the quasi-one-dimensional charge transfer salts (TMTTF)₂X (X=AsF₆, PF₆, SbF₆), model materials of quantum spin chains. First, we have examined in continuous wave and on a wide range of temperature and frequency, the charge-ordered phase already observed in these materials below the temperature TCO. We have identified two new phenomena at T≺TCO: the rotation of the principal axes of the g factor and a structural change related to a doubling of the unit cell parameter. A quantum chemical calculation was carried out using DFT confirming our experimental results. In the second part of the thesis, we have presented the results obtained by EPR in continuous wave and pulsed wave on the correlated defects study in spin chain systems. In continuous wave, we have detected for the first time a narrow EPR line at low temperature, suggesting the presence of correlated defects having the characteristics of solitons. The pulsed EPR measurements allowed us to observe the first Rabi oscillations of trapped solitons and to determine their robust character. These latter results offer an alternative approach for spin qubits in quantum information processing
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Books on the topic "SBF"

1

Onaran, Oğuz. Ankara Üniversitesi SBF dergisi dizini, cild 1-46. Ankara: Ankara Üniversitesi Siyasal Bilgiler Fakültesi, 1992.

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Petzet, Nana. Sammeln Bewahren Forschen: Das SBF-System, 1995-2001. Köln: Salon, 2001.

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Staff, JMS Books LLC, and La Toya Hankins. SBF Seeking ... JMS Books LLC, 2012.

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Books, Young. Judy & Martian Sbf. Hodder & Stoughton Childrens Division, 1993.

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Books, Young. Laughing Snowman - Sbf. Hodder & Stoughton Childrens Division, 1992.

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Books, Young. Maps & Mazes Sbf. Hodder & Stoughton Childrens Division, 1993.

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Books, Young. Machines Design Sbf. Hodder & Stoughton Childrens Division, 1993.

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Books, Young. Sir Chancelot Sbf. Hodder & Stoughton Childrens Division, 1994.

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Books, Young. Sir Chancelot - Sbf. Hodder & Stoughton Childrens Division, 1992.

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Xivors Birthday Sbf. Collins, 1990.

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Book chapters on the topic "SBF"

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Villars, P., K. Cenzual, R. Gladyshevskii, O. Shcherban, V. Dubenskyy, V. Kuprysyuk, I. Savysyuk, and R. Zaremba. "Na(SbF)AsO4." In Landolt-Börnstein - Group III Condensed Matter, 162. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-22847-6_107.

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Howard, Natasha R. "SBF Seeking Motherhood: An Autoethnographic Journey Toward Pregnancy." In Refiguring Motherhood Beyond Biology, 31–41. London: Routledge, 2023. http://dx.doi.org/10.4324/9781003311799-4.

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Zhao, Ying, Tian Ying Xiong, Hua-Zi Jin, Li Bin Wang, and Tie Fan Li. "Study of Corrosion Resistance of Anodized Ti6Al4V in SBF." In Materials Science Forum, 205–8. Stafa: Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-966-0.205.

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Yost, Gregg R., Georg Klinker, Marc Linster, David Marques, and John McDermott. "The SBF framework, 1989–1994: From applications to workplaces." In Lecture Notes in Computer Science, 318–39. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/3-540-58487-0_17.

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Kosachan, Nudthakarn, Angkhana Jaroenworaluck, Narissa Koolpreechanun, Supatra Jinawath, and R. Stevens. "Surface Characteristics of HA and β-TCP Immersed in SBF." In Bioceramics 20, 167–70. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-457-x.167.

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Nakamura, Satoshi, Keiichirou Shinohara, Nobuo Kieda, and Kimihiro Yamashita. "Polarization Energy Effect of Electrovector Hydroxyapatite on Bonelike Crystal Growth in SBF." In Bioceramics 18, 145–48. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-992-x.145.

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Hofmann, Ingo, Lenka Müller, Peter Greil, and Frank A. Müller. "Precipitation of Carbonated Calcium Phosphate Powders from a Highly Supersaturated SBF Solution." In Key Engineering Materials, 59–62. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-422-7.59.

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Zhang, Y., Yoshiyuki Yokogawa, and Tetsuya Kameyama. "Bimodal Porous Bi-Phasic Calcium Phosphate Ceramics and Its Dissolution in SBF Solution." In Key Engineering Materials, 91–94. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-422-7.91.

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Kishi, Shigeki, Norikazu Okimoto, Satoshi Nakamura, Keishi Nishio, Kazuaki Hashimoto, Yoshitomo Toda, and Kimihiro Yamashita. "Chemicovector Effect of Nano-Size-Hydroxyapatite Doped YSZ Ceramics on Apatite Formability in SBF." In Bioceramics 18, 589–92. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-992-x.589.

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Jalota, Sahil, A. Cuneyt Tas, and Sarit B. Bhaduri. "In Vitro Comparison of the Apatite Inducing Ability of Three Different SBF Solutions on Ti6A14V." In Advances in Bioceramics and Biocomposites: Ceramic Engineering and Science Proceedings, Volume 26, Number 6, 111–18. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2008. http://dx.doi.org/10.1002/9780470291269.ch14.

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Conference papers on the topic "SBF"

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Biscardi, I., G. Raimondo, M. Cantiello, E. Brocato, Giuliana Giobbi, Amedeo Tornambe, Gabriella Raimondo, et al. "Optical SBF of distant shell galaxies." In PROBING STELLAR POPULATIONS OUT TO THE DISTANT UNIVERSE: CEFALU 2008, Proceedings of the International Conference. AIP, 2009. http://dx.doi.org/10.1063/1.3141549.

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Moridis, Nefeli, John Lee, Duc Lam, Christie Schultz, and Wade Wardlow. "Hydraulic Fracture Characterization Using Rapid Simulation." In SPE Hydraulic Fracturing Technology Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/204150-ms.

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Abstract The purpose of this paper is to present a technique to estimate hydraulic fracture (HF) length, fracture conductivity, and fracture efficiency using simple and rapid but rigorous reservoir simulation matching of historical production, and where available, pressure. The methodology is particularly appropriate for analysis of horizontal wells with multiple fractures in tight unconventional or unconventional resource plays. In our discussion, we also analyze the differences between the results from decline curve analysis (DCA) approach and the Science Based Forecasting (SBF) results that this work proposes. When we characterize fracture properties with SBF, we can do a better job of forecasting than if we randomly combine fracture properties and reservoir permeability together in a decline-curve trend. The forecasts are significantly different with SBF, therefore fracture characterization plays an important role and SBF uses this characterization to produce different (and better) forecasts.
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Ingole, S., R. Ribeiro, O. Juan, H. Liang, M. Usta, C. Bindal, and A. H. Ucisik. "Biotribological Behavior of Boronized Tungsten." In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-63692.

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Boronized tungsten is one of the potential biomaterials due to its high corrosion resistance, and high strength. Present investigation encompasses the wear behavior of this material in dry condition as well as in simulated body fluid (SBF). The pin-on-disc reciprocating tribometer was utilized to conduct the wear tests. The worn surfaces were analyzed using an atomic force microscope (AFM). Results showed that not only the SBF reduces the friction, but also shortens the initial break-in period. This presentation discusses the wear mechanisms of boronized tungsten affected by SBF.
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Vardhan, Voleti Sri Sai Harsha, Ambuj Sharma, Sathish Tiruveedhula, and Ratna Sunil Buradagunta. "Comparative Study on the Biodegradation Behavior of Pure Mg in NaCl Solution and Simulated Body Fluids." In 1st International Conference on Mechanical Engineering and Emerging Technologies. Switzerland: Trans Tech Publications Ltd, 2022. http://dx.doi.org/10.4028/p-grwes4.

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Developing Mg based implants for temporary applications based on their biodegradation in the physiological environment is a potential research area in the biomedical engineering. Assessing the bio-corrosion in simulated conditions helps to reduce the complexity of research studies associated with in-vivo experiments and can be used to assess the true behavior of the Mg implant in artificial solutions. On the other hand, assessing the corrosion behavior by using 3.5% NaCl solution is a standard ASTM protocol widely used in the industries. Hence, in the present work, degradation of pure Mg due to bio-corrosion in two different solutions i.e simulated body fluids (SBF) and 3.5% NaCl solution has been investigated. From the results, the weight loss measurements indicated higher degradation during the initial 24 h in SBF solution. However, with the increased immersion time to 72 h, due to the deposition of mineral phases from SBF as confirmed from the electron microscopy and X-Ray diffraction study, the degradation was observed as decreased in SBF compared with NaCl solution. Hence, the results demonstrate that the evaluation of degradation behavior of Mg based materials in simulated physiological environments is appropriate compared with the standard NaCl environment.
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Chen, Y. K., H. Ji, and X. B. Zheng. "Apatite Formation on Vacuum Plasma Sprayed Titanium Coating after Chemical Modification." In ITSC2007, edited by B. R. Marple, M. M. Hyland, Y. C. Lau, C. J. Li, R. S. Lima, and G. Montavon. ASM International, 2007. http://dx.doi.org/10.31399/asm.cp.itsc2007p0381.

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Abstract Formation of bonelike apatite is an essential prerequisite for implants to make direct bond to living bone. The apatite formation can be assessed in vitro using a simulated body fluid (SBF) that has almost equal compositions of inorganic ions to human blood plasma. In this study, Ti coatings were prepared by vacuum plasma spraying, and then they were treated by NaOH aqueous solution, immersed in distilled water, heated at 600 °C in a furnace. Microstructure and bioactivity of the surface modified Ti coatings were examined by SEM observation and SBF test respectively. The results obtained revealed that a net-like structure comprising of many micropores was present on the surfaces of the treated Ti coatings. After immersed in SBF, apatite layer was formed on their surfaces, suggesting that the surface modification coatings have good bioactivity.
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Helms, Michael, Swaroop Vattam, and Ashok Goel. "The Effect of Functional Modeling on Understanding Complex Biological Systems." In ASME 2010 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/detc2010-28939.

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Biologically inspired engineering design requires understanding of complex biological systems for use as analogues in engineering designs. In this study we seek to understand how functional representations, in particular Structure-Behavior-Function (SBF) models, enable understanding complex biological systems. Results from this study indicate that SBF representations may enable more accurate inferences about biological systems for complex and abstract questions than purely textual, or textual and diagrammatic, representations. They also suggest that no one representation is best for all types of inferences.
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Zheng, X. B., and C. X. Ding. "Bonding Strength Test and Biological Evaluation of Plasma Sprayed HA-Based Composite Coatings." In ITSC2001, edited by Christopher C. Berndt, Khiam A. Khor, and Erich F. Lugscheider. ASM International, 2001. http://dx.doi.org/10.31399/asm.cp.itsc2001p1017.

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Abstract To improve the bonding strength of HA coating, several HA-based composite coatings (HA/Ti, HA/ZrO2 HA/ZrO2SiO2 and HA/NiCr composite coatings) have been fabricated via atmospheric plasma spraying. The bonding strengths of fabricated specimens were tested by ASTM C-633 method. The bioactivity of composite coatings was evaluated by examining carbonate-containing apatite formation on their surfaces in simulated body fluid (SBF). In vitro cell cultures were carried out to examine the biocompatibihty of composite coatings. The results obtained revealed that the addition of metal or ceramics in HA improved the bonding strength of coating significantly except HA/ZrO2-SiO2 composite coating. In SBF test, all of these four coatings were covered by carbonate-containing apatite after immersed in SBF, indicating good bioactivity for composite coatings. The results of cell cultures produced the testimony of excellent biocompatibihty for the coatings except that HA/NiCr composite coating possessed cytotoxicity. By comprehensive survey of bonding strength, bioactivity and biocompatibihty, HA/Ti and HA/ZrO2 composite coatings were candidates of prospective biocoatings.
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Monsalve, M., H. Ageorges, E. López, F. Vargas, and F. Bolívar. "Bioactive Glass Coatings Manufactured by Plasma Spraying from 31SiO2-11P2O5-(58-x) CaO- X MgO Powders." In ITSC2015, edited by A. Agarwal, G. Bolelli, A. Concustell, Y. C. Lau, A. McDonald, F. L. Toma, E. Turunen, and C. A. Widener. ASM International, 2015. http://dx.doi.org/10.31399/asm.cp.itsc2015p0925.

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Abstract In this study, bioactive glass powders were synthesized from four different types of oxides (SiO2, P2O5, CaO and MgO). These oxides were mixed, melted, milled and sieved to produce powders with two chemical compositions of the 31SiO2-11P2O5-(58-x)CaO-xMgO system. The powders were plasma sprayed onto AISI 316L stainless steel and Ti6Al4V titanium alloy substrates using a F4MB Sulzer Metco gun. The physical and mechanical properties of coatings, as well as their bioactivity were evaluated. The bioactivity tests were carried out exposing the surface of coatings to simulated body fluid (SBF) during 1, 9 and 15 days. The thickness and hardness of apatite layer produced on the surface of each coating during bioactivity tests were evaluated. The results indicate that the thickness of apatite layer formed during 15 days in SBF is between 31 and 51 µm and its hardness is between 1.5 and 1.9 GPa according to the chemical composition of feed stock powder used to manufacture the coatings. Additionally, the harness of bioglass coatings decreased around 26% after to expose them to SBF.
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Ribeiro, R., S. Ingole, O. Juan, H. Liang, M. Usta, C. Bindal, and A. H. Ucisik. "Friction and Wear Behavior of Boronized Chromium for Biological Applications." In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-63696.

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Enhanced corrosion and wear resistance are crucially important to prolong the service life of biomaterials. Boronizing has been reported to enhance the wear resistance of pure chromium. In this research, we investigate friction and wear behavior of boronized chromium. Pin-on-disc tribometer was used to conduct the wear and friction tests. Experiments were conducted in dry conditions as well as in simulated body fluid (SBF). Fundamental aspects of wear mode and lubrication behavior were studied using surface characterization techniques such as TEM, and X-ray diffraction. Results showed evidence of tribo-chemical interactions between SBF and work piece materials.
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Sah, Sripati, Robert X. Gao, and Timothy Kurp. "Spatial Blending Functions for Improved Estimation of Contact Pressure Distribution at the Tool-Workpiece Interface." In ASME 2010 International Manufacturing Science and Engineering Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/msec2010-34107.

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On-line measurement of contact pressure distribution (CPD) at the tool-workpiece interface during sheet metal stamping processes plays a critical role in tool wear and product quality monitoring and control. Realizing such measurement poses a significant challenge, due to the severe operating conditions at the contact interface. Since the number of sensors that can be integrated into a tooling structure is limited by concerns of structural integrity, a mathematical framework is needed for estimating the contact pressure distribution measured by sparse sensors. This paper investigates a new technique termed the Spatial Blending Functions (SBF), which provides an improved estimate of the contact pressure distribution by merging measurements from tooling-embedded sensors with simulation results from Finite Element modeling. The effectiveness of the SBF-based merging technique is demonstrated for the case of a panel stamping operation through Finite Element simulations and experiments performed on a stamping press with a tooling-integrated sensing system. Analysis of the results demonstrates that the SBF-based CPD estimation is more accurate than classic numeric surface interpolation methods, thus enhances contact pressure distribution estimation for stamping process monitoring.
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Reports on the topic "SBF"

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KOOPMAN, DAVIDC. A Summary of Rheology Data For SB3 and SB2/3 Blend Simulant Savannah River Site Wastes. Office of Scientific and Technical Information (OSTI), March 2004. http://dx.doi.org/10.2172/828298.

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Lambert, D., B. Pickenheim, and D. Best. DWPF SB6 INITIAL CPC FLOWSHEET TESTING SB6-1 TO SB6-4L TESTS OF SB6-A AND SB6-B SIMULANTS. Office of Scientific and Technical Information (OSTI), September 2009. http://dx.doi.org/10.2172/965395.

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LORIER, TROY. SB3 Phase 2 Variability Study: The impact of REDOX on Durability for the FRIT 418-SB2/3 System. Office of Scientific and Technical Information (OSTI), March 2004. http://dx.doi.org/10.2172/822652.

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Tanaka M. and S. Y. Zhang. SBE Beam Profile. Office of Scientific and Technical Information (OSTI), June 1995. http://dx.doi.org/10.2172/1132413.

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Cheney, Philip W. Perspectives on SBA. Fort Belvoir, VA: Defense Technical Information Center, May 2001. http://dx.doi.org/10.21236/ada385933.

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Surface, Eric A. SOF Language Transformation Strategy Needs Assessment Project: SOF Operator Survey Report. Fort Belvoir, VA: Defense Technical Information Center, October 2004. http://dx.doi.org/10.21236/ada634233.

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Turnley, Jessica G. Cross-Cultural Competence and Small Groups: Why SOF Are the Way SOF Are. Fort Belvoir, VA: Defense Technical Information Center, March 2011. http://dx.doi.org/10.21236/ada541961.

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Burriel, Pablo, Iván Kataryniuk, Carlos Moreno Pérez, and Francesca Viani. New supply bottlenecks index based on newspaper data. Madrid: Banco de España, January 2023. http://dx.doi.org/10.53479/25166.

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We develop a new monthly indicator of supply bottlenecks using newspaper articles. The supply bottlenecks index (SBI) provides a consistent narrative of supply issues related to wars, natural disasters, strikes and, most recently, the COVID-19 pandemic. Innovations in the SBI have important macroeconomic implications: an increase in the SBI functions as a cost-push shock, decreasing industrial production and employment, and pushing prices up, so that monetary policy faces important trade-offs.
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Fischer, W., and F. Pilat. An SXF Extension for Alignment. Office of Scientific and Technical Information (OSTI), November 1998. http://dx.doi.org/10.2172/1119554.

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Hong, J. K., H. J. Kim, I. Lee, and C. Kim. Sub-bottom profiler (SBP) survey. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2016. http://dx.doi.org/10.4095/297871.

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