Bibliografias temáticas / Physical and chemical characterizations

Literatura científica selecionada sobre o tema "Physical and chemical characterizations"

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Publicado: 31 de agosto de 2024

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Artigos de revistas sobre o assunto "Physical and chemical characterizations"

1

Ducel, J. F., e J. J. Videau. "Physical and chemical characterizations of sodium borophosphate glasses". Materials Letters 13, n.º 4-5 (abril de 1992): 271–74. http://dx.doi.org/10.1016/0167-577x(92)90230-h.

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2

Demirbaş, Ayhan. "PHYSICAL AND CHEMICAL CHARACTERIZATIONS OF ASPHALTENES FROM DIFFERENT SOURCES". Petroleum Science and Technology 20, n.º 5-6 (6 de janeiro de 2002): 485–95. http://dx.doi.org/10.1081/lft-120003573.

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3

Govind, Shashirekha, SushantKumar Kamilla, Binita Nanda, Amit Jena e Neeta Mohanty. "Physical and Chemical Characterizations of Novel Bioactive Caries Detecting Solution". Dental Hypotheses 12, n.º 1 (2021): 8. http://dx.doi.org/10.4103/denthyp.denthyp_90_20.

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Li, Shao-Meng, A. M. Macdonald, J. W. Strapp, Y. N. Lee e X. L. Zhou. "Chemical and physical characterizations of atmospheric aerosols over southern California". Journal of Geophysical Research: Atmospheres 102, n.º D17 (1 de setembro de 1997): 21341–53. http://dx.doi.org/10.1029/97jd01310.

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Catur Adi, Annis, Nila Reswari Haryana, Damar Rastri Adhika, Adi Suwandi e Heni Rachmawati. "Chemical and Physical Characterizations of Cooked Rice Using Different Cooking Methods". Journal of Food and Nutrition Research 8, n.º 11 (18 de novembro de 2020): 638–45. http://dx.doi.org/10.12691/jfnr-8-11-4.

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6

Jindo, K., H. Mizumoto, Y. Sawada, M. A. Sanchez-Monedero e T. Sonoki. "Physical and chemical characterizations of biochars derived from different agricultural residues". Biogeosciences Discussions 11, n.º 8 (1 de agosto de 2014): 11727–46. http://dx.doi.org/10.5194/bgd-11-11727-2014.

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Abstract. Biochar has received large attention as a strategy to tackle against carbon emission. Not only carbon fixation has been carried out but also other merits for agricultural application due to unique physical and chemical character such as absorption of contaminated compounds in soil, trapping ammonia and methane emission from compost, and enhancement of fertilizer quality. In our study, different local waste feed stocks (rice husk, rice straw, wood chips of apple tree (Malus Pumila) and oak tree (Quercus serrata)), in Aomori, Japan, were utilized for creating biochar with different temperature (400–800 °C). Concerning to the biochar production, the pyrolysis of lower temperature had more biochar yield than higher temperature pyrolysis process. On the contrary, surface areas and adsorption characters have been increased as increasing temperature. The proportions of carbon content in the biochars also increased together with increased temperatures. Infrared-Fourier spectra (FT-IR) and 13C-NMR were used to understand carbon chemical compositions in our biochars, and it was observed that the numbers of the shoulders representing aromatic groups, considered as stable carbon structure appeared as the temperature came closer to 600 °C, as well as in FT-IR. In rice materials, the peak assigned to SiO2, was observed in all biochars (400–800 °C) in FT-IR. We suppose that the pyrolysis at 600 °C creates the most recalcitrant character for carbon sequestration, meanwhile the pyrolysis at 400 °C produces the superior properties as a fertilizer by retaining volatile and easily labile compounds which promotes soil microbial activities.
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Omeiri, S., G. Rekhila, M. Trari e Y. Bessekhouad. "Physical and photoelectrochemical characterizations of Ba2SnO4-δ elaborated by chemical route". Journal of Solid State Electrochemistry 19, n.º 6 (27 de fevereiro de 2015): 1651–58. http://dx.doi.org/10.1007/s10008-015-2786-y.

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Hong, Heesun, Ok Joo Lee, Young Jin Lee, Ji Seung Lee, Olatunji Ajiteru, Hanna Lee, Ye Ji Suh, Md Tipu Sultan, Soon Hee Kim e Chan Hum Park. "Cytocompatibility of Modified Silk Fibroin with Glycidyl Methacrylate for Tissue Engineering and Biomedical Applications". Biomolecules 11, n.º 1 (29 de dezembro de 2020): 35. http://dx.doi.org/10.3390/biom11010035.

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Hydrogel with chemical modification has been used for 3D printing in the biomedical field of cell and tissue-based regeneration because it provides a good cellular microenvironment and mechanical supportive ability. As a scaffold and a matrix, hydrogel itself has to be modified chemically and physically to form a β-sheet crosslinking structure for the strength of the biomaterials. These chemical modifications could affect the biological damage done to encapsulated cells or surrounding tissues due to unreacted chemical residues. Biological assessment, including assessment of the cytocompatibility of hydrogel in clinical trials, must involve testing with cytotoxicity, irritation, and sensitization. Here, we modified silk fibroin and glycidyl methacrylate (Silk-GMA) and evaluated the physical characterizations, residual chemical detection, and the biological effect of residual GMA depending on dialysis periods. Silk-GMA depending on each dialysis period had a typical β-sheet structure in the characterization analysis and residual GMA decreased from dialysis day 1. Moreover, cell proliferation and viability rate gradually increased; additionally, necrotic and apoptotic cells decreased from dialysis day 2. These results indicate that the dialysis periods during chemical modification of natural polymer are important for removing unreacted chemical residues and for the potential application of the manufacturing standardization for chemically modified hydrogel for the clinical transplantation for tissue engineering and biomedical applications.
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9

Niu, D., R. W. Ashcraft, Z. Chen, S. Stemmer e G. N. Parsons. "Chemical, Physical, and Electrical Characterizations of Oxygen Plasma Assisted Chemical Vapor Deposited Yttrium Oxide on Silicon". Journal of The Electrochemical Society 150, n.º 5 (2003): F102. http://dx.doi.org/10.1149/1.1566415.

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Tavita, Gusti Eva, Mega Sari Juane Sofiana, Asri Mulya Ashari, Rita Kurnia Apindiati, Lucky Hartanti e Warsidah Warsidah. "Characterization and Antioxidant Activity of Herbal Tea from Gambir Leaves (Uncaria gambir) with Different Drying Processes". Sainstek : Jurnal Sains dan Teknologi 15, n.º 2 (31 de dezembro de 2023): 69. http://dx.doi.org/10.31958/js.v15i2.7719.

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Recently, natural antioxidants have been explored to reduce the side effects of synthetic antioxidants. Plants from the Rubiaceae family have strong antioxidants and are widely used in food and cosmetic preparations. his study aims to determine gambir leaf herbal tea's physical-chemical characterization and antioxidant activity (Uncaria gambir) in different drying processes. The processing of drying is drying in direct sunlight and drying with an oven at 60oC for 7 hours. The physical-chemical characterizations are water and ash content, pH, and organoleptic of the herbal tea—the antioxidant activity of the herbal tea determination using the free radical scavenging method 2,2-diphenyl-1-picrylhydrazyl (DPPH). The characteristics compare with SNI 3836 of 2013. The herbal tea of Gambir with oven drying is the best yield (53.21%). The antioxidant activity (IC50) of herbal tea in direct sunlight and oven dryings are 122.44 ppm and 82.21 ppm, respectively.
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Teses / dissertações sobre o assunto "Physical and chemical characterizations"

1

Kavanagh, Debbie M. "Chemical and physical characterization of clay bodies". Thesis, Aston University, 2001. http://publications.aston.ac.uk/9643/.

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Suitable methods for the assessment of the effect of freeze-thaw action upon ceramic tiles have been determined. The results obtained have been shown to be reproducible with some work in this area still warranted. The analysis of Whichford Potteries clays via a variety of analytical techniques has shown them to be a complex mix of both clay and non-clay minerals. 57Fe Mössbauer spectroscopy has highlighted the presence of both small and large particleα-Fe203, removable via acid washing. 19F MAS NMR has demonstrated that the raw Whichford Pottery clays examined have negligible fluorine content. This is unlikely to be detrimental to ceramic wares during the heating process. A unique technique was used for the identification of fluorine in solid-state systems. The exchange of various cations into Wyoming Bentonite clay by microwave methodology did not show the appearance of five co-ordinate aluminium when examined by 27Al MAS NMR. The appearance of Qo silicate was linked to an increase in the amount of tetrahedrally bound aluminium in the silicate framework. This is formed as a result of the heating process. The analysis of two Chinese clays and two Chinese clay raw materials has highlighted a possible link between the two. These have also been shown to be a mix of both clay and non-clay minerals. Layered double hydroxides formed by conventional and microwave methods exhibited interesting characteristics. The main differences between the samples examined were not found to be solely attributable to the differences between microwave and conventional methods but more attributable to different experimental conditions used.
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2

Fracasso, Guido <1960&gt. "Synthesis and Physical-Chemical characterization of Metallic Nanoparticles". Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2010. http://amsdottorato.unibo.it/2895/2/Fracasso_Guido_tesi.pdf.

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The stabilization of nanoparticles against their irreversible particle aggregation and oxidation reactions. is a requirement for further advancement in nanoparticle science and technology. For this reason the research aim on this topic focuses on the synthesis of various metal nanoparticles protected with monolayers containing different reactive head groups and functional tail groups. In this work cuprous bromide nanocrystals haave been synthetized with a diameter of about 20 nanometers according to a new sybthetic method adding dropwise ascorbic acid to a water solution of lithium bromide and cupric chloride under continuous stirring and nitrogen flux. Butane thiolate Cu protected nanoparticles have been synthetized according to three different syntesys methods. Their morphologies appear related to the physicochemical conditions during the synthesis and to the dispersing medium used to prepare the sample. Synthesis method II allows to obtain stable nanoparticles of 1-2 nm in size both isolated and forming clusters. Nanoparticle cluster formation was enhanced as water was used as dispersing medium probably due to the idrophobic nature of the butanethiolate layers coating the nanoparticle surface. Synthesis methods I and III lead to large unstable spherical nanoparticles with size ranging between 20 to 50 nm. These nanoparticles appeared in the TEM micrograph with the same morphology independently on the dispersing medium used in the sample preparation. The stability and dimensions of the copper nanoparticles appear inversely related. Using the same methods above described for the butanethiolate protected copper nanoparticles 4-methylbenzenethiol protected copper nanoparticles have been prepared. Diffractometric and spectroscopic data reveal that decomposition processes didn’t occur in both the 4-methylbenzenethiol copper protected nanoparticles precipitates from formic acid and from water in a period of time six month long. Se anticarcinogenic effects by multiple mechanisms have been extensively investigated and documented and Se is defined a genuine nutritional cancer-protecting element and a significant protective effect of Se against major forms of cancer. Furthermore phloroglucinol was found to possess cytoprotective effects against oxidative stress, thanks to reactive oxygen species (ROS) which are associated with cells and tissue damages and are the contributing factors for inflammation, aging, cancer, arteriosclerosis, hypertension and diabetes. The goal of our work has been to set up a new method to synthesize in mild conditions amorphous Se nanopaticles surface capped with phloroglucinol, which is used during synthesis as reducing agent to obtain stable Se nanoparticles in ethanol, performing the synergies offered by the specific anticarcinogenic properties of Se and the antioxiding ones of phloroalucinol. We have synthesized selenium nanoparticles protected by phenolic molecules chemically bonded to their surface. The phenol molecules coating the nanoparticles surfaces form low ordered arrays as can be seen from the wider shape of the absorptions in the FT-IR spectrum with respect to those appearing in that of crystalline phenol. On the other hand, metallic nanoparticles with unique optical properties, facile surface chemistry and appropriate size scale are generating much enthusiasm in nanomedicine. In fact Au nanoparticles has immense potential for both cancer diagnosis and therapy. Especially Au nanoparticles efficiently convert the strongly adsorbed light into localized heat, which can be exploited for the selective laser photothermal therapy of cancer. According to the about, metal nanoparticles-HA nanocrystals composites should have tremendous potential in novel methods for therapy of cancer. 11 mercaptoundecanoic surface protected Au4Ag1 nanoparticles adsorbed on nanometric apathyte crystals we have successfully prepared like an anticancer nanoparticles deliver system utilizing biomimetic hydroxyapatyte nanocrystals as deliver agents. Furthermore natural chrysotile, formed by densely packed bundles of multiwalled hollow nanotubes, is a mineral very suitable for nanowires preparation when their inner nanometer-sized cavity is filled with a proper material. Bundles of chrysotile nanotubes can then behave as host systems, where their large interchannel separation is actually expected to prevent the interaction between individual guest metallic nanoparticles and act as a confining barrier. Chrysotile nanotubes have been filled with molten metals such as Hg, Pb, Sn, semimetals, Bi, Te, Se, and with semiconductor materials such as InSb, CdSe, GaAs, and InP using both high-pressure techniques and metal-organic chemical vapor deposition. Under hydrothermal conditions chrysotile nanocrystals have been synthesized as a single phase and can be utilized as a very suitable for nanowires preparation filling their inner nanometer-sized cavity with metallic nanoparticles. In this research work we have synthesized and characterized Stoichiometric synthetic chrysotile nanotubes have been partially filled with bi and monometallic highly monodispersed nanoparticles with diameters ranging from 1,7 to 5,5 nm depending on the core composition (Au, Au4Ag1, Au1Ag4, Ag). In the case of 4 methylbenzenethiol protected silver nanoparticles, the filling was carried out by convection and capillarity effect at room temperature and pressure using a suitable organic solvent. We have obtained new interesting nanowires constituted of metallic nanoparticles filled in inorganic nanotubes with a inner cavity of 7 nm and an isolating wall with a thick ranging from 7 to 21 nm.
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3

Fracasso, Guido <1960&gt. "Synthesis and Physical-Chemical characterization of Metallic Nanoparticles". Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2010. http://amsdottorato.unibo.it/2895/.

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The stabilization of nanoparticles against their irreversible particle aggregation and oxidation reactions. is a requirement for further advancement in nanoparticle science and technology. For this reason the research aim on this topic focuses on the synthesis of various metal nanoparticles protected with monolayers containing different reactive head groups and functional tail groups. In this work cuprous bromide nanocrystals haave been synthetized with a diameter of about 20 nanometers according to a new sybthetic method adding dropwise ascorbic acid to a water solution of lithium bromide and cupric chloride under continuous stirring and nitrogen flux. Butane thiolate Cu protected nanoparticles have been synthetized according to three different syntesys methods. Their morphologies appear related to the physicochemical conditions during the synthesis and to the dispersing medium used to prepare the sample. Synthesis method II allows to obtain stable nanoparticles of 1-2 nm in size both isolated and forming clusters. Nanoparticle cluster formation was enhanced as water was used as dispersing medium probably due to the idrophobic nature of the butanethiolate layers coating the nanoparticle surface. Synthesis methods I and III lead to large unstable spherical nanoparticles with size ranging between 20 to 50 nm. These nanoparticles appeared in the TEM micrograph with the same morphology independently on the dispersing medium used in the sample preparation. The stability and dimensions of the copper nanoparticles appear inversely related. Using the same methods above described for the butanethiolate protected copper nanoparticles 4-methylbenzenethiol protected copper nanoparticles have been prepared. Diffractometric and spectroscopic data reveal that decomposition processes didn’t occur in both the 4-methylbenzenethiol copper protected nanoparticles precipitates from formic acid and from water in a period of time six month long. Se anticarcinogenic effects by multiple mechanisms have been extensively investigated and documented and Se is defined a genuine nutritional cancer-protecting element and a significant protective effect of Se against major forms of cancer. Furthermore phloroglucinol was found to possess cytoprotective effects against oxidative stress, thanks to reactive oxygen species (ROS) which are associated with cells and tissue damages and are the contributing factors for inflammation, aging, cancer, arteriosclerosis, hypertension and diabetes. The goal of our work has been to set up a new method to synthesize in mild conditions amorphous Se nanopaticles surface capped with phloroglucinol, which is used during synthesis as reducing agent to obtain stable Se nanoparticles in ethanol, performing the synergies offered by the specific anticarcinogenic properties of Se and the antioxiding ones of phloroalucinol. We have synthesized selenium nanoparticles protected by phenolic molecules chemically bonded to their surface. The phenol molecules coating the nanoparticles surfaces form low ordered arrays as can be seen from the wider shape of the absorptions in the FT-IR spectrum with respect to those appearing in that of crystalline phenol. On the other hand, metallic nanoparticles with unique optical properties, facile surface chemistry and appropriate size scale are generating much enthusiasm in nanomedicine. In fact Au nanoparticles has immense potential for both cancer diagnosis and therapy. Especially Au nanoparticles efficiently convert the strongly adsorbed light into localized heat, which can be exploited for the selective laser photothermal therapy of cancer. According to the about, metal nanoparticles-HA nanocrystals composites should have tremendous potential in novel methods for therapy of cancer. 11 mercaptoundecanoic surface protected Au4Ag1 nanoparticles adsorbed on nanometric apathyte crystals we have successfully prepared like an anticancer nanoparticles deliver system utilizing biomimetic hydroxyapatyte nanocrystals as deliver agents. Furthermore natural chrysotile, formed by densely packed bundles of multiwalled hollow nanotubes, is a mineral very suitable for nanowires preparation when their inner nanometer-sized cavity is filled with a proper material. Bundles of chrysotile nanotubes can then behave as host systems, where their large interchannel separation is actually expected to prevent the interaction between individual guest metallic nanoparticles and act as a confining barrier. Chrysotile nanotubes have been filled with molten metals such as Hg, Pb, Sn, semimetals, Bi, Te, Se, and with semiconductor materials such as InSb, CdSe, GaAs, and InP using both high-pressure techniques and metal-organic chemical vapor deposition. Under hydrothermal conditions chrysotile nanocrystals have been synthesized as a single phase and can be utilized as a very suitable for nanowires preparation filling their inner nanometer-sized cavity with metallic nanoparticles. In this research work we have synthesized and characterized Stoichiometric synthetic chrysotile nanotubes have been partially filled with bi and monometallic highly monodispersed nanoparticles with diameters ranging from 1,7 to 5,5 nm depending on the core composition (Au, Au4Ag1, Au1Ag4, Ag). In the case of 4 methylbenzenethiol protected silver nanoparticles, the filling was carried out by convection and capillarity effect at room temperature and pressure using a suitable organic solvent. We have obtained new interesting nanowires constituted of metallic nanoparticles filled in inorganic nanotubes with a inner cavity of 7 nm and an isolating wall with a thick ranging from 7 to 21 nm.
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4

Wang, Junwei. "Chemical doping of metal oxide nanomaterials and characterization of their physical-chemical properties". Case Western Reserve University School of Graduate Studies / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=case1333829935.

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5

Bouvet-Marchand, Agathe. "Syntheses, preparations and physico-chemical characterizations of functional hybrid thin layers". Thesis, Aix-Marseille, 2018. http://www.theses.fr/2018AIXM0338.

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Pour répondre aux défis de la science, des matériaux toujours plus performants sont nécessaires. Néanmoins, les plastiques ou les métaux ne suffisent pas à eux seuls à apporter une solution aux problématiques actuelles qui exigent des matériaux peu coûteux, facilement mis en forme, industrialisables et aux propriétés variées (conductivité électronique, transparence, auto-nettoyant, anti-corrosif etc.). En revanche, l'association plastique-métal ou "hybride" semble s'imposer ces dernières années comme une voie prometteuse. En effet, dans ces matériaux, les propriétés des deux composés ne font pas que s'additionner mais une synergie se forme conduisant à des propriétés uniques. Atteindre un tel effet synergétique n'est cependant pas aisé et nécessite de contrôler avec précision les interactions entre le plastique et le métal. Lors de cette thèse, des revêtements hybrides de très faible épaisseurs (du nanomètre ou micromètre) ont été préparés pour répondre à des problématiques variées. Des matériaux destinés à être utilisés dans des capteurs de reconnaissance digitale de très haute résolution, à encapsuler des milieux biologiques pour leur observation en microscopie, à collecter un signal électrique ou encore dédiés à protéger des écrans de l'eau ont été élaborés. Afin de répondre aux cahiers des charges de ces différentes applications, des molécules spécifiques ont été synthétisées dans chaque cas pour permettre une bonne interaction avec les composants inorganiques et leur assemblage en un matériau a été minutieusement ajusté pour conduire aux propriétés souhaitées
To face the technical challenges of our time, more and more performing materials are needed. However, neither plastic nor metals are sufficient to answer the different current problematic that require materials to be cheap, easily processable, industrializable with oustanding properties (electronic conductivity, transparency, self-cleaning, anti-corrosive etc.). These last years, the association plastic-metal or "hybrid" appears to be a promising route. Indeed, in these materials, not only properties of the plastic and metal are added but a synergy happens leading to unique properties. However, reaching this synergetic effect is not a straightforward task and an accurate control of the interaction between the two counterparts is crucial. During this Ph.D, thin hybrid films (from nanometer to micrometer) were prepared to answer various industrial and academic problematic. Materials dedicated to be used in fingerprint-sensor with very high resolution, to encapsulate biological media for electronic microscopy analysis, to collect an electrical signal or prevent water degradation on screens were elaborated. In order to answer the specific requirements of these different applications, particular molecules were designed to enable a good interaction with the inorganic components and their assembly was carefully adjusted to obtain the desired properties in the resulting material
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6

Bouvet-Marchand, Agathe. "Syntheses, preparations and physico-chemical characterizations of functional hybrid thin layers". Electronic Thesis or Diss., Aix-Marseille, 2018. http://www.theses.fr/2018AIXM0338.

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Pour répondre aux défis de la science, des matériaux toujours plus performants sont nécessaires. Néanmoins, les plastiques ou les métaux ne suffisent pas à eux seuls à apporter une solution aux problématiques actuelles qui exigent des matériaux peu coûteux, facilement mis en forme, industrialisables et aux propriétés variées (conductivité électronique, transparence, auto-nettoyant, anti-corrosif etc.). En revanche, l'association plastique-métal ou "hybride" semble s'imposer ces dernières années comme une voie prometteuse. En effet, dans ces matériaux, les propriétés des deux composés ne font pas que s'additionner mais une synergie se forme conduisant à des propriétés uniques. Atteindre un tel effet synergétique n'est cependant pas aisé et nécessite de contrôler avec précision les interactions entre le plastique et le métal. Lors de cette thèse, des revêtements hybrides de très faible épaisseurs (du nanomètre ou micromètre) ont été préparés pour répondre à des problématiques variées. Des matériaux destinés à être utilisés dans des capteurs de reconnaissance digitale de très haute résolution, à encapsuler des milieux biologiques pour leur observation en microscopie, à collecter un signal électrique ou encore dédiés à protéger des écrans de l'eau ont été élaborés. Afin de répondre aux cahiers des charges de ces différentes applications, des molécules spécifiques ont été synthétisées dans chaque cas pour permettre une bonne interaction avec les composants inorganiques et leur assemblage en un matériau a été minutieusement ajusté pour conduire aux propriétés souhaitées
To face the technical challenges of our time, more and more performing materials are needed. However, neither plastic nor metals are sufficient to answer the different current problematic that require materials to be cheap, easily processable, industrializable with oustanding properties (electronic conductivity, transparency, self-cleaning, anti-corrosive etc.). These last years, the association plastic-metal or "hybrid" appears to be a promising route. Indeed, in these materials, not only properties of the plastic and metal are added but a synergy happens leading to unique properties. However, reaching this synergetic effect is not a straightforward task and an accurate control of the interaction between the two counterparts is crucial. During this Ph.D, thin hybrid films (from nanometer to micrometer) were prepared to answer various industrial and academic problematic. Materials dedicated to be used in fingerprint-sensor with very high resolution, to encapsulate biological media for electronic microscopy analysis, to collect an electrical signal or prevent water degradation on screens were elaborated. In order to answer the specific requirements of these different applications, particular molecules were designed to enable a good interaction with the inorganic components and their assembly was carefully adjusted to obtain the desired properties in the resulting material
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7

Brooker, Michael R. "Physical and Chemical Characterization of Self-Developing Agricultural Floodplains". The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1513778530623727.

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Vereš, Ján, Štefan Jakabský e Vladimír Šepelák. "Chemical, physical, morphological and structural characterization of blast furnace sludge". Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-188184.

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Vereš, Ján, Štefan Jakabský e Vladimír Šepelák. "Chemical, physical, morphological and structural characterization of blast furnace sludge". Diffusion fundamentals 12 (2010) 88, 2010. https://ul.qucosa.de/id/qucosa%3A13909.

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10

RISI, GIULIA. "PHYSICAL-CHEMICAL CHARACTERIZATION OF POLYSACCHARIDES AND THEIR INTERACTION WITH PROTEINS". Doctoral thesis, Università degli studi di Pavia, 2020. http://hdl.handle.net/11571/1318349.

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I glicosamminoglicani sono polisaccaridi lineari ad alta densità di carica negativa, caratteristica che permette loro di interagire facilmente con proteine e grazie a questa interazione sono in grado di svolgere importanti funzioni biologiche oltre che di esercitare attività farmacologiche; ad esempio leparina grazie alla sua interazione specifica con la proteina antitrombina è uno dei più potenti e utilizzati farmaci anticoagulanti. Il presente lavoro di tesi si propone di caratterizzare principalmente glicosamminoglicani e loro miscele, seguendo due linee di ricerca. La prima linea di ricerca, oggetto dei primi due anni di dottorato, è consistita nello studio, validazione e ottimizzazione di metodi cromatografici per esclusione dimensionale volti alla valutazione della distribuzione di peso molecolare di campioni di eparina a diversa lunghezza di catena e provenienti da differenti sorgenti animali (primo anno), e di miscele di eparina e dermatan solfato (secondo anno). Questo studio nasce considerando la natura eterogena e polidispersa dei polisaccaridi, per i quali la distribuzione del peso molecolare ricopre un ruolo fondamentale nella loro applicabilità in campo farmacologico; da qui, la necessità di avere metodiche in grado di valutare questo parametro il più correttamente possibile. A tale scopo sono stati presi in considerazione e sono stati comparati sia metodi richiedenti una classica calibrazione convenzionale, consistenti nella costruzione di una curva di calibrazione con un set di standard certificati, e conseguente ottenimento di una distribuzione dei pesi molecolari relativa alla curva, sia metodi assoluti che richiedono un detector come il Light Scattering che non necessita di alcuna calibrazione delle colonne cromatografiche utilizzate e valuta il peso molecolare dallo scattering delle particelle in soluzione. La seconda linea di ricerca, sviluppata lungo tutti e tre gli anni di dottorato, ruota attorno alla caratterizzazione chimico-fisica del complesso eparina/fattore piastrinico 4 (PF4), causa di uno dei peggiori effetti collaterali associati alla terapia con eparina, la Trombocitopenia eparina-indotta (HIT). Poiché tale complesso è influenzato sia dalla lunghezza di catena delleparina, sia dalla sua carica superficiale, le due principali tecniche utilizzate per studiarlo sono state la Spettroscopia di Correlazione Fotonica (PCS) e la valutazione del Potenziale Zeta, sviluppando ed ottimizzando dei metodi basati sulla titolazione di una concentrazione fissa di PF4 con diverse concentrazioni di eparina volti non solo allottenimento di una indicazione sul rapporto proteina/eparina (PHR) considerabile massimo per la formazione di un complesso riconoscibile da quegli anticorpi scatenanti HIT, ma anche in grado di discriminare tra eparine a diversa lunghezza di catena (primo anno). Tali metodiche sono state poi validate anche per miscele più complesse e per polisaccaridi non appartenenti alla famiglia dei glicosamminoglicani (terzo anno). Infine, è stata ottenuta una prima valutazione dei parametri termodinamici dellinterazione eparina/PF4 mediante Titolazione Calorimetrica Isotermica (ITC) volta allo sviluppo di un metodo in grado di distinguere eparine a diversa lunghezza di catena (secondo anno), tecnica ripresa anche per la valutazione termodinamica di polisaccaridi non appartenenti alla famiglia dei glicosamminoglicani (terzo anno).
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Livros sobre o assunto "Physical and chemical characterizations"

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Květoslav, Spurný, ed. Physical and chemical characterization of individual airborne particles. Chichester [West Sussex]: E. Horwood, 1986.

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L, Brusseau Mark, ed. Innovative subsurface remediation: Field testing of physical, chemical, and characterization technologies. Washington, D.C: American Chemical Society, 1999.

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K, Kokula Krishna Hari, e K. Saravanan, eds. Investigation of Physical, Chemical and Structural Characterization of Eichhornia crassipes Fiber. Tiruppur, Tamil Nadu, India: Association of Scientists, Developers and Faculties, 2016.

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Wolfgang, Richter, e Sitter Helmut, eds. Epitaxy: Physical Principles and Technical Implementation. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004.

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Carroll, Todd R. The selection and measurement of physical properties for characterization of chemical protective clothing materials. Cincinnati, OH: U.S. Environmental Protection Agency, Risk Reduction Engineering Laboratory, 1990.

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Carroll, Todd R. The selection and measurement of physical properties for characterization of chemical protective clothing materials. Cincinnati, OH: U.S. Environmental Protection Agency, Risk Reduction Engineering Laboratory, 1990.

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Reyes, Mallada, e Menéndez Miguel, eds. Inorganic membranes: Synthesis, characterization and applications. Amsterdam: Elsevier, 2008.

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Krause, Horst H. Conversion Concepts for Commercial Applications and Disposal Technologies of Energetic Systems. Dordrecht: Springer Netherlands, 1997.

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Roussak, O. V. Applied Chemistry: A Textbook for Engineers and Technologists. 2a ed. Boston, MA: Springer US, 2013.

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Rodríguez-Martínez, Jesús. Characterization of springflow in the north coast limestone of Puerto Rico using physical, chemical, and stable isotopic methods. San Juan, P.R: U.S. Geological Survey, 1997.

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Capítulos de livros sobre o assunto "Physical and chemical characterizations"

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Adeniji, Adegoke, e Adeboye Adejare. "Chemical and Physical Characterizations of Potential New Chemical Entity". In Preclinical Development Handbook, 211–25. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2007. http://dx.doi.org/10.1002/9780470249031.ch6.

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Borgos, Sven Even F. "Characterization Methods: Physical and Chemical Characterization Techniques". In Pharmaceutical Nanotechnology: Innovation and Production, 135–56. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2016. http://dx.doi.org/10.1002/9783527800681.ch7.

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Alfarra, Rami, Marie Camredon, Mathieu Cazaunau, Jean-François Doussin, Hendrik Fuchs, Spiro Jorga, Gordon McFiggans et al. "Physical and Chemical Characterization of the Chamber". In A Practical Guide to Atmospheric Simulation Chambers, 73–111. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-22277-1_2.

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AbstractIn order to perform experiments in the chamber, characterization of physical properties is essential for the evaluation and interpretation of experiments. In this chapter, recommendations are given how to measure physical parameters such as temperature and pressure. For photochemistry experiments, knowledge of the radiation either provided by the sun or lamps is key to calculate photolysis frequencies. Standard protocols are described how to validate the calculation of the radiation inside the chamber using actinometry experiments. In addition, the characterization of loss processes for gas-phase species as well as for aerosol is discussed. Reference experiments can be used to test the state of the chamber. Different types of reference experiments focusing on gas-phase photo-oxidation experiments are recommended and described in detail in this chapter.
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Peyronel, Fernanda, e Elena Dibildox-Alvarado. "Oleogel Characterization: Physical, Physicochemical, and Chemical Techniques". In Advances in Oleogel Development, Characterization, and Nutritional Aspects, 421–70. Cham: Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-46831-5_18.

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Chenah, May, e Moussa Amrani. "Physical and Chemical Characterization of Ampelodesmos Mauritanicus". In Recent Advances in Environmental Science from the Euro-Mediterranean and Surrounding Regions, 1235–36. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-70548-4_357.

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Alcocer, Javier, e Fernando W. Bernal-Brooks. "Physical and Chemical Characterization of Inland Waters". In Mexican Aquatic Environments, 1–41. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-11126-7_1.

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Xinghua, He, Zhu Shujing e Jiann-Yang Hwang. "Physical and Chemical Properties of MSWI Fly ash". In Characterization of Minerals, Metals, and Materials 2016, 451–59. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-48210-1_56.

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Xinghua, He, Zhu Shujing e Jiann-Yang Hwang. "Physical and Chemical Properties of Mswi Fly Ash". In Characterization of Minerals, Metals, and Materials 2016, 451–59. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2016. http://dx.doi.org/10.1002/9781119263722.ch56.

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Shon, H. K., S. Phuntsho, S. Vigneswaran, J. Kandasamy, R. Aryal e V. Jegatheesan. "Physical, Chemical, and Biological Characterization of Membrane Fouling". In Membrane Technology and Environmental Applications, 457–503. Reston, VA: American Society of Civil Engineers, 2012. http://dx.doi.org/10.1061/9780784412275.ch16.

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Bergantz, George W. "Chapter 2. PHYSICAL AND CHEMICAL CHARACTERIZATION OF PLUTONS". In Contact Metamorphism, editado por Derrill M. Kerrick, 13–42. Berlin, Boston: De Gruyter, 1991. http://dx.doi.org/10.1515/9781501509612-005.

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Trabalhos de conferências sobre o assunto "Physical and chemical characterizations"

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Miu, Lucretia, Simona-Maria Paunescu, Maria-Cristina Micu, Iulia-Maria Caniola, Madalina Ignat, Claudiu Sendrea e Elena Badea. "Chemical and physico-mechanical characterizations of leather for restoration". In The 8th International Conference on Advanced Materials and Systems. INCDTP - Leather and Footwear Research Institute (ICPI), Bucharest, Romania, 2020. http://dx.doi.org/10.24264/icams-2020.v.7.

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Leather is a complex material mostly consisting of a matrix of collagen, chemically stabilized by various tannins. This matrix, sooner or later undergoes alterations as a consequence of interactions between their structure and environment. A comprehensive study based on multiple chemical and physico-mechanical standard tests regarding leather samples which were artificially aged from 7 to 112 days has been made at 70°C. The behavior in artificial aging of calf leather samples tanned at pilot level with two different vegetal tannins, mimosa and quebracho, were investigated due to its’s similarity to the natural degradation of historical leather samples. Physico-mechanical characteristics of historical leather can be corelated with the high impact of degree of deterioration even though there are no standard regulations. To be able to choose the proper way to achieve compatibility with an appropriate material in the restoration-conservation process, multiple sample characteristic must be known. The condition of historical leather can be assessed by a series of simple visual and physical examinations which determine the flexibility, strength and coherency of the fibers and then correlate these assessments with the condition of leather as determined by various chemical and physical-chemical analyses. Therefore, the following chemical standard tests were made: volatile substances, shrinkage temperature, extractable substances, total soluble substances and the following physico-mechanical tests: tensile strength, elongation at breaking and tear resistance.
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Balqis, M. Y., E. M. G. Aruan e N. H. Mohd. "Chemical and physical characterizations of dried and pulverized sewage sludge/clay as lightweight aggregates". In Environment (ISESEE). IEEE, 2011. http://dx.doi.org/10.1109/isesee.2011.5977119.

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Thorne, J. M., L. V. Knight e B. G. Peterson. "Physical And Chemical Characterization Of Multilayered Structures". In 29th Annual Technical Symposium, editado por Gerald F. Marshall. SPIE, 1985. http://dx.doi.org/10.1117/12.949685.

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Lecuyer, T., E. Teston, T. Maldiney, D. Scherman e C. Richard. "Physico-chemical characterizations of Cr doped persistent luminescence nanoparticles". In SPIE BiOS, editado por Wolfgang J. Parak, Marek Osinski e Xing-Jie Liang. SPIE, 2016. http://dx.doi.org/10.1117/12.2207477.

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Remmel, Thomas, Wei Chen, Ran Liu, Mike Kottke, Richard Gregory, Peter Fejes, Beth Baumert e Peir Chu. "Physical and chemical characterization of barium strontium titanate thin films". In CHARACTERIZATION AND METROLOGY FOR ULSI TECHNOLOGY. ASCE, 1998. http://dx.doi.org/10.1063/1.56807.

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Slotwinski, J. A., P. E. Stutzman, C. F. Ferraris, S. S. Watson, M. A. Peltz e E. J. Garboczi. "Physical and chemical characterization techniques for metallic powders". In 40TH ANNUAL REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION: Incorporating the 10th International Conference on Barkhausen Noise and Micromagnetic Testing. AIP Publishing LLC, 2014. http://dx.doi.org/10.1063/1.4864954.

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Dalavi, Shankar B., M. Manivel Raja e Rabi Narayan Panda. "Chemical synthesis, characterizations and magnetic properties of nanocrystalline Fe50Co50 alloy". In SOLID STATE PHYSICS: Proceedings of the 58th DAE Solid State Physics Symposium 2013. AIP Publishing LLC, 2014. http://dx.doi.org/10.1063/1.4872558.

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Ivan, Catalin D., Frederick B. Growcock e James E. Friedheim. "Chemical and Physical Characterization of Aphron-Based Drilling Fluids". In SPE Annual Technical Conference and Exhibition. Society of Petroleum Engineers, 2002. http://dx.doi.org/10.2118/77445-ms.

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Priyanka e Rajendra S. Dhaka. "Structural and magnetic characterizations of Co2FeGa/SiO2 nanoparticles prepared via chemical route". In DAE SOLID STATE PHYSICS SYMPOSIUM 2017. Author(s), 2018. http://dx.doi.org/10.1063/1.5028755.

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Sarbar, M. A., e M. D. Wingrove. "Physical And Chemical Characterization Of Saudi Arabian Crude Oil Emulsions". In SPE Annual Technical Conference and Exhibition. Society of Petroleum Engineers, 1997. http://dx.doi.org/10.2118/38817-ms.

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Relatórios de organizações sobre o assunto "Physical and chemical characterizations"

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Ismail, I. M., e T. W. Hawkins. Physical and Chemical Characterization of Ultrafine Aluminum Powders. Fort Belvoir, VA: Defense Technical Information Center, outubro de 1999. http://dx.doi.org/10.21236/ada408575.

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Anderl, Robert Andrew, Robert James Pawelko e Galen Richard Smolik. Physical Characterization and Steam Chemical Reactivity of Carbon Fiber Composites. Office of Scientific and Technical Information (OSTI), maio de 2001. http://dx.doi.org/10.2172/911032.

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Pesce-Rodriguez, Rose A., e Stephanie M. Piraino. Chemical and Physical Characterization of Comp A-3 Type II Prills. Fort Belvoir, VA: Defense Technical Information Center, junho de 2013. http://dx.doi.org/10.21236/ada585711.

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Therndat, Thomas G. Microsensors for In-Situ Chemical, Physical, and Radiological Characterization of Mixed Waste. Office of Scientific and Technical Information (OSTI), junho de 2002. http://dx.doi.org/10.2172/834595.

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Thundat, Thomas G. Microsensors for In-situ Chemical, Physical, and Radiological Characterization of Mixed Waste. Office of Scientific and Technical Information (OSTI), junho de 2001. http://dx.doi.org/10.2172/839374.

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Thundat, Thomas G., R. J. Warmack, P. V. Bonnesen, G. M. Brown, Reza Dabestani e P. F. Britt. Microsensors for In-situ Chemical, Physical, and Radiological Characterization of Mixed Waste. Office of Scientific and Technical Information (OSTI), junho de 1999. http://dx.doi.org/10.2172/828632.

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Thundat, Thomas G., R. J. Warmack, G. M. Brown, R. Dabestani e P. F. Britt. Microsensors for In-Situ Chemical, Physical, and Radiological Characterization of Mixed Waste. Office of Scientific and Technical Information (OSTI), junho de 2000. http://dx.doi.org/10.2172/828634.

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Thundat, Thomas G., R. J. Warmack e G. M. Brown. Microsensors for In-Situ Chemical, Physical , and Radiological Characterization of Mixed Waste. Office of Scientific and Technical Information (OSTI), junho de 2001. http://dx.doi.org/10.2172/828635.

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Thundat, Thomas G. Microsensors for In-situ Chemical, Physical and Radiological Characterization of Mixed Waste (73808). Office of Scientific and Technical Information (OSTI), junho de 2004. http://dx.doi.org/10.2172/838996.

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Apel, M. L., G. K. Becker, Z. K. Ragan, J. Frasure, B. D. Raivo, L. G. Gale e D. P. Pace. Radiological, physical, and chemical characterization of transuranic wastes stored at the Idaho National Engineering Laboratory. Office of Scientific and Technical Information (OSTI), março de 1994. http://dx.doi.org/10.2172/10167792.

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