Готові списки джерел за темами / CHNSO

Добірка наукової літератури з теми "CHNSO"

Автор: Grafiati
Опубліковано: 13 вересня 2021
Оновлено: 14 лютого 2022

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  1. Статті в журналах
  2. Дисертації
  3. Книги
  4. Частини книг
  5. Тези доповідей конференцій
  6. Звіти організацій

Статті в журналах з теми "CHNSO":

1

El Hamdaoui, Lahcen, Ahmed Talbaoui, and Mohammed El Moussaouiti. "Nucleophilic Displacement Reaction on Tosyl Cellulose by L-Methionine to the Synthesis of Novel Water-Soluble Cellulose Derivative and Its Antibacterial Activity." International Journal of Polymer Science 2021 (February 13, 2021): 1–9. http://dx.doi.org/10.1155/2021/6613684.

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A novel ampholytic cellulose derivative, cellulose-L-methionine, has been synthesized by means of an esterification reaction of microcrystalline cellulose with tosyl chloride (p-TsCl) in DMAc/LiCl (8%) at 8°C that was followed by nucleophilic displacement (SN) of the tosyl group by the L-methionine amino acid. The resulting structure of cellulose-L-methionine has been characterized by elemental analysis (CHNSO), Fourier-transform infrared spectroscopy (FTIR), proton nuclear magnetic resonance (1H-NMR), and scanning electron microscopy (SEM). The antibacterial activity of the synthesized product was screened against Gram-positive and Gram-negative microbial strains such as Staphylococcus aureus, Escherichia coli, and Pseudomonas aeruginosa, by the agar well diffusion method, and compared with commercial antibiotics such as ampicillin and chloramphenicol. It was found that antibacterial experiment revealed excellent antibacterial activity of the cellulose-methionine with respect to a minimal inhibitory concentration (MIC) reference.
2

Razavi, Zahra, Nourollah Mirghaffari, and Behzad Rezaei. "Adsorption of crude and engine oils from water using raw rice husk." Water Science and Technology 69, no. 5 (December 23, 2013): 947–52. http://dx.doi.org/10.2166/wst.2013.804.

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The raw rice husk (RRH) was used as a low cost adsorbent to remove three oil compounds with different viscosities (crude oil, engine oil and spent engine oil) from an aqueous environment. Some of the sorbent specifications were characterized using a CHNSO analyzer, Fourier transform infrared, scanning electron microscope and inductively coupled plasma spectroscopy. With decreasing RRH particles size, the oil adsorption percentage was reduced for crude, spent and engine oils from 50 to 30%, 65 to 20% and 70 to 0.01%, respectively. This was probably due to damage of the microcavities. The removal percentage by sorbent at optimized conditions was 88, 80 and 55% for engine, spent and crude oils, respectively, corresponding to their descending viscosity. The adsorption of crude and spent oils on rice husk followed the Freundlich isotherm model, while the adsorption of engine oil was fitted by the Langmuir model. The maximum adsorption capacity (qmax), calculated from the Langmuir model for the adsorption of engine oil on RRH, was 1,250 mg/g.
3

Alkhouzaam, Abedalkader, Hazim Qiblawey, and Majeda Khraisheh. "Polydopamine Functionalized Graphene Oxide as Membrane Nanofiller: Spectral and Structural Studies." Membranes 11, no. 2 (January 27, 2021): 86. http://dx.doi.org/10.3390/membranes11020086.

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High-degree functionalization of graphene oxide (GO) nanoparticles (NPs) using polydopamine (PDA) was conducted to produce polydopamine functionalized graphene oxide nanoparticles (GO-PDA NPs). Aiming to explore their potential use as nanofiller in membrane separation processes, the spectral and structural properties of GO-PDA NPs were comprehensively analyzed. GO NPs were first prepared by the oxidation of graphite via a modified Hummers method. The obtained GO NPs were then functionalized with PDA using a GO:PDA ratio of 1:2 to obtain highly aminated GO NPs. The structural change was evaluated using XRD, FTIR-UATR, Raman spectroscopy, SEM and TEM. Several bands have emerged in the FTIR spectra of GO-PDA attributed to the amine groups of PDA confirming the high functionalization degree of GO NPs. Raman spectra and XRD patterns showed different crystalline structures and defects and higher interlayer spacing of GO-PDA. The change in elemental compositions was confirmed by XPS and CHNSO elemental analysis and showed an emerging N 1s core-level in the GO-PDA survey spectra corresponding to the amine groups of PDA. GO-PDA NPs showed better dispersibility in polar and nonpolar solvents expanding their potential utilization for different purposes. Furthermore, GO and GO-PDA-coated membranes were prepared via pressure-assisted self-assembly technique (PAS) using low concentrations of NPs (1 wt. %). Contact angle measurements showed excellent hydrophilic properties of GO-PDA with an average contact angle of (27.8°).
4

Shishkova, D. K., T. V. Glushkova, O. S. Efimova, A. N. Popova, V. Yu Malysheva, R. P. Kolmykov, Z. R. Ismagilov, et al. "MORPHOLOGICAL AND CHEMICAL PROPERTIES OF SPHERICAL AND NEEDLE CALCIUM PHOSPHATE BIONS." Complex Issues of Cardiovascular Diseases 8, no. 1 (March 29, 2019): 59–69. http://dx.doi.org/10.17802/2306-1278-2019-8-1-59-69.

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Aim. To compare morphological properties, mineral, and organic profile of spherical calcium phosphate bions (SCPB) and needle calcium phosphate bions (NCPB) for the assessment of the CPB-specific endothelial toxicity in models of mild or severe hypercalcemia/hyperphosphatemia in the further studies.Methods. Both SCPB and NCPB were artificially synthesized employing blood-mimetic medium either moderately or significantly supersaturated of calcium and phosphorus salts. Size and shape of SCPB and NCPB were investigated by scanning and transmission electron microscopy and atomic force microscopy. Elemental analysis was performed utilizing energy-dispersive X-ray spectroscopy, atomic emission spectroscopy, and CHNSO analysis, functional groups were examined using Fourier-transform infrared spectroscopy and Raman spectroscopy while chemical formula was identified by X-ray powder diffraction analysis. Protein profile of SCPB and NCPB was screened employing sodium dodecyl sulfate polyacrylamide gel electrophoresis following silver staining.Results. SCPB were visualized as crystalline spherical spongeous particles of 80-200 nm diameter and mean diameter of around 120 nm while NCPB represented needle crystals of a similar diameter. Both SCPB and NCPB had similar crystallinity, surface charge and tended to form clusters of several particles. Furthermore, both SCPB and NCPB were composed of carbon, oxygen, hydrogen, nitrogen, calcium, and phosphorus, contained phosphate (PO4 3-), carbonate (CO3 2-), and hydroxyl (OH- ) functional groups, and consisted of hydroxyapatite (Ca10(PO4 )6 (OH)2 ) and carbonate-hydroxyapatite (Ca10(PO4)3 (CO3)3 (OH)2 ). In addition, protein profile of SCPB and NCPB was similar and notable for the abundant albumin and fetuin A levels.Conclusion. Having similar size, surface charge, extent of crystallinity, and chemical composition, SCPB and NCPB possess a different shape.
5

Zhao, Y., A. G. Hallar, and L. R. Mazzoleni. "Atmospheric organic matter in clouds: exact masses and molecular formula identification using ultrahigh resolution FT-ICR mass spectrometry." Atmospheric Chemistry and Physics Discussions 13, no. 8 (August 7, 2013): 20561–610. http://dx.doi.org/10.5194/acpd-13-20561-2013.

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Abstract. Clouds alter the composition of atmospheric aerosol by acting as a medium for interactions between gaseous and particulate phase substances. To determine the cloud water atmospheric organic matter (AOM) composition and study the cloud processing of aerosols, two samples of supercooled clouds were collected at Storm Peak Laboratory near Steamboat Spring, Colorado (3220 m a.s.l.). Approximately 3000 molecular formulas were assigned to ultrahigh resolution mass spectra of the samples after using a reverse phase extraction procedure to isolate the AOM components from the cloud water. Nitrogen containing compounds (CHNO compounds), sulfur containing compounds (CHOS and CHNOS compounds) and other oxygen containing compounds (CHO compounds) with molecular weights up to 700 Da were observed. Average oxygen-to-carbon ratios of ~0.6 indicate a slightly more oxidized composition than most water-soluble organic carbon identified in aerosol studies, which may result from aqueous oxidation in the clouds. The AOM composition indicates significant influences from biogenic secondary organic aerosol (SOA) and residential wood combustion. We observed 60% of the cloud water CHO molecular formulas to be identical to SOA samples of α-pinene, β-pinene, d-limonene, and β-caryophyllene ozonolysis. CHNO compounds had the highest number frequency and relative abundances and are associated with residential wood combustion and NOx oxidation. We observed multiple nitrogen atoms in the assigned molecular formulas for the nighttime cloud sample composite indicating the significance of nighttime emissions or NOx oxidation on the AOM composition. Several CHOS and CHNOS compounds with reduced sulfur (in addition to the commonly observed oxidized sulfur containing compounds) were also observed, however further investigation is needed to determine the origin of the reduced sulfur containing compounds. Overall, the molecular composition determined using ultrahigh resolution Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometry provides an unambiguous identification of the cloud water organic composition in the Rocky Mountain area which could help to improve the understanding of aqueous phase processes.
6

Zhao, Y., A. G. Hallar, and L. R. Mazzoleni. "Atmospheric organic matter in clouds: exact masses and molecular formula identification using ultrahigh-resolution FT-ICR mass spectrometry." Atmospheric Chemistry and Physics 13, no. 24 (December 18, 2013): 12343–62. http://dx.doi.org/10.5194/acp-13-12343-2013.

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Abstract. Clouds alter the composition of atmospheric aerosol by acting as a medium for interactions between gas- and particulate-phase substances. To determine the cloud water atmospheric organic matter (AOM) composition and study the cloud processing of aerosols, two samples of supercooled clouds were collected at the Storm Peak Laboratory near Steamboat Springs, Colorado (3220 m a.s.l.). Approximately 3000 molecular formulas were assigned to ultrahigh-resolution mass spectra of the samples after using a reversed-phase extraction procedure to isolate the AOM components from the cloud water. Nitrogen-containing compounds (CHNO compounds), sulfur-containing compounds (CHOS and CHNOS compounds) and other oxygen-containing compounds (CHO compounds) with molecular weights up to 700 Da were observed. Average oxygen-to-carbon ratios of ∼0.6 indicate a slightly more oxidized composition than most water-soluble organic carbon identified in aerosol studies, which may result from aqueous oxidation in the clouds. The AOM composition indicates significant influences from biogenic secondary organic aerosol (SOA) and residential wood combustion. We observed 60% of the cloud water CHO molecular formulas to be identical to SOA samples of α-pinene, β-pinene, d-limonene, and β-caryophyllene ozonolysis. CHNO compounds had the highest number frequency and relative abundances and are associated with residential wood combustion and NOx oxidation. Multiple nitrogen atoms in the assigned molecular formulas for the nighttime cloud sample composite were observed, indicating the significance of nitrate radical reactions on the AOM composition. Several CHOS and CHNOS compounds with reduced sulfur (in addition to the commonly observed oxidized sulfur-containing compounds) were also observed; however further investigation is needed to determine the origin of the reduced sulfur-containing compounds. Overall, the molecular composition determined using ultrahigh-resolution Fourier-transform ion cyclotron resonance (FT-ICR) mass spectrometry provides an unambiguous identification of the cloud water organic anion composition in the Rocky Mountain area that could help to improve the understanding of aqueous-phase processes.
7

Kolanjinathan, M., R. Hariharasuthan, V. Sivaramakrishnan, R. P. Patel, Juliet Josephine Joy, M. Vimalan, K. SenthilKannan, et al. "XRD, CHNSO, fluorescence, filter-influx, NLO, photoconductivity, hardness and helical spring-fabricated device stress analysis of 2′-chloro-4-methoxy-3-nitrobenzil (CMNB) crystal of different scalings for opto-electronic filter and band gap engineering utilities." Journal of Materials Science: Materials in Electronics 32, no. 8 (March 20, 2021): 10049–57. http://dx.doi.org/10.1007/s10854-021-05663-6.

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8

Maalmarugan, J., V. Yokeswaran, R. Divya, H. Ganesan, R. P. Patel, G. Flora, K. SenthilKannan, et al. "Synthesis, growth, XRD, NLO, CHNSO, structure by theoretical approach, dielectric, absorbance, photoconductivity and bio studies of 4-(4-Acetyl-5-Methyl-1H-1, 2, 3-Triazol-1-yl) Benzonitrile crystals for optical, opto-electronic, and photonics utilities." Journal of Materials Science: Materials in Electronics 32, no. 10 (April 27, 2021): 13850–58. http://dx.doi.org/10.1007/s10854-021-05960-0.

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9

Ganesan, H., K. SenthilKannan, S. Christy, J. Maalmarugan, G. Flora, Juliet Josephine Joy, M. Gulam Mohamed, et al. "Synthesis, growth, XRD, NLO, CHNSO, computational-structural, dielectric, photoconductivity, hardness and biostudies of diethyl 2-amino-5-{4-[bis (4-methyl phenyl) amino] benzamido} thiophene-3,4-dicarboxylate (DABMPABTD) macro-, nano crystals for device fabrication, pharma, electronic uses." Journal of Materials Science: Materials in Electronics 32, no. 11 (May 18, 2021): 15498–508. http://dx.doi.org/10.1007/s10854-021-06100-4.

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10

Hertkorn, N., M. Harir, B. P. Koch, B. Michalke, and P. Schmitt-Kopplin. "High-field NMR spectroscopy and FTICR mass spectrometry: powerful discovery tools for the molecular level characterization of marine dissolved organic matter." Biogeosciences 10, no. 3 (March 8, 2013): 1583–624. http://dx.doi.org/10.5194/bg-10-1583-2013.

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Abstract. High-performance, non-target, high-resolution organic structural spectroscopy was applied to solid phase extracted marine dissolved organic matter (SPE-DOM) isolated from four different depths in the open South Atlantic Ocean off the Angola coast (3° E, 18° S; Angola Basin) and provided molecular level information with extraordinary coverage and resolution. Sampling was performed at depths of 5 m (Angola Current; near-surface photic zone), 48 m (Angola Current; fluorescence maximum), 200 m (still above Antarctic Intermediate Water, AAIW; upper mesopelagic zone) and 5446 m (North Atlantic Deep Water, NADW; abyssopelagic, ~30 m above seafloor) and produced SPE-DOM with near 40% carbon yield and beneficial nuclear magnetic resonance (NMR) relaxation properties, a crucial prerequisite for the acquisition of NMR spectra with excellent resolution. 1H and 13C NMR spectra of all four marine SPE-DOM showed smooth bulk envelopes, reflecting intrinsic averaging from massive signal overlap, with a few percent of visibly resolved signatures and variable abundances for all major chemical environments. The abundance of singly oxygenated aliphatics and acetate derivatives in 1H NMR spectra declined from surface to deep marine SPE-DOM, whereas C-based aliphatics and carboxyl-rich alicyclic molecules (CRAM) increased in abundance. Surface SPE-DOM contained fewer methyl esters than all other samples, likely a consequence of direct exposure to sunlight. Integration of 13C NMR spectra revealed continual increase of carboxylic acids and ketones from surface to depth, reflecting a progressive oxygenation, with concomitant decline of carbohydrate-related substructures. Aliphatic branching increased with depth, whereas the fraction of oxygenated aliphatics declined for methine, methylene and methyl carbon. Lipids in the oldest SPE-DOM at 5446 m showed a larger share of ethyl groups and methylene carbon than observed in the other samples. Two-dimensional NMR spectra showed exceptional resolution and depicted resolved molecular signatures in excess of a certain minimum abundance. Classical methyl groups terminating aliphatic chains represented ~15% of total methyl in all samples investigated. A noticeable fraction of methyl (~2%) was bound to olefinic carbon. Methyl ethers were abundant in surface marine SPE-DOM, and the chemical diversity of carbohydrates was larger than that of freshwater and soil DOM. In all samples, we identified sp2-hybridized carbon chemical environments with discrimination of isolated and conjugated olefins and α,β-unsaturated double bonds. Olefinic proton and carbon atoms were more abundant than aromatic ones; olefinic unsaturation in marine SPE-DOM will be more directly traceable to ultimate biogenic precursors than aromatic unsaturation. The abundance of furan, pyrrol and thiophene derivatives was marginal, whereas benzene derivatives, phenols and six-membered nitrogen heterocycles were prominent; a yet unassigned set of six-membered N-heterocycles with likely more than one single nitrogen occurred in all samples. Various key polycyclic aromatic hydrocarbon substructures suggested the presence of thermogenic organic matter at all water depths. Progressive NMR cross-peak attenuation from surface to deep marine SPE-DOM was particularly strong in COSY NMR spectra and indicated a continual disappearance of biosignatures as well as entropy gain from an ever increased molecular diversity. Nevertheless, a specific near-seafloor SPE-DOM signature of unsaturated molecules recognized in both NMR and Fourier transform ion cyclotron mass spectrometry (FTICR/MS) possibly originated from sediment leaching. The conformity of key NMR and FTICR/MS signatures suggested the presence of a large set of identical molecules throughout the entire ocean column even though the investigated water masses belonged to different oceanic regimes and currents. FTICR/MS showed abundant CHO, CHNO, CHOS and CHNOS molecular series with slightly increasing numbers of mass peaks and average mass from surface to bottom SPE-DOM. The proportion of CHO and CHNO negative ions increased from surface to depth, whereas CHOS and especially CHNOS molecular series markedly declined. While certain rather aliphatic CHOS and CHNOS ions were observed solely in the surface, deep marine SPE-DOM was enriched in unique unsaturated and rather oxygenated CHO and CHNO molecular series. With the exception of abyssopelagic SPE-DOM at 5446 m, which showed a peculiar CHOS chemistry of unsaturated carbon and reduced sulphur (black sulphur), CHO and CHNO molecular series contributed ~87% to total positive electrospray ionization FTICR mass peak integral, with a near constant ratio of CHNO / CHO molecular compositions near 1.13 ± 0.05. In case of all four marine SPE-DOM, remarkably disparate average elemental compositions as determined from either MS and NMR spectra were observed, caused by a pronounced ionization selectivity in electrospray ionization FTICR/MS. The study demonstrates that the exhaustive characterization of complex unknowns in marine DOM will enable a meaningful classification of individual marine biogeosignatures. Future in-depth functional biodiversity studies with a clear understanding of DOM structure and function might eventually lead to a novel, unified perception of biodiversity and biogeochemistry.
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Статті в журналах Книги

Дисертації з теми "CHNSO":

1

Masár, Martin. "Zpracování vybraných druhů jedlého hmyzu pro potravinářské účely." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2021. http://www.nusl.cz/ntk/nusl-449738.

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Táto diplomová práca je zameraná na nutričné zhodnotenie vybraných práškov hmyzu zo svrčkov domových, z lariev múčiara obyčajného a potemníka stajňového a jedného potravinového produktu na báze hmyzu, ktorý bol tiež vyvinutý ako jeden z cieľov tejto práce. Okrem základných nutričných analýz boli použité aj ICP-OES pre zistenie obsahu minerálov a GC-FID pre zistenie zloženia mastných kyselín. Tiež bol stanovený obsah hrubej bielkoviny pomocou CHNSO analyzátora a stanovený obsah EAA. Pomocou PCA analýzy sa úspešne podarilo rozlíšiť vzorky jednotlivých hmyzích práškov, ktoré potvrdili rozmanitosť jednotlivých druhov hmyzu a vďaka projekcii do roviny hlavných komponent je možné vidieť, v ktorých nutričných parametroch sa najviac líšia. Bola tiež vykonaná senzorická analýza novo vyvinutého produktu na báze hmyzu s prídavkom prášku z potemníka stajňového v porovnaní s konkurenčnými produktmu. Súčasťou práce je aj rozsiahly spotrebiteľský prieskum na vzorke 2 019 účastníkov, týkajúci sa vnímania entomofágie v Českej republike a na Slovensku, ktorý sa uskutočnil online.
2

Bossoutrot, Valérie. "Etudes cinétiques expérimentales et théoriques des réactions des intermédiaires CH3, CH3O, CH3SO avec NO2 en relation avec l'oxydation atmosphérique du sulfure de diméthyle (DMS)." Orléans, 2000. http://www.theses.fr/2000ORLE2030.

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Ce travail a consisté d'une part en une étude expérimentale et théorique de la réaction entre CH3SO et NO2 et de la décomposition thermique de CH3SO2, et d'autre part une étude expérimentale des réactions entre CH3 et CH3O et NO2. L'étude des réactions des intermédiaires soufrés visait à mieux connaître le mécanisme d'oxydation atmosphérique du DMS et à en préciser en particulier le rendement en SO2 dont dépend l'impact climatique du DMS. L'étude des réactions de CH3 et CH3O avec NO2 avait pour but de fournir des données nécessaires à la simulation des systèmes réactionnels utilisés pour l'étude des radicaux soufrés. Les constantes de vitesse des réactions entre CH3, CH3O et NO2 ont été déterminées par la méthode de photolyse laser pulsée couplée à la fluorescence induite par laser (FIL) des radicaux CH3O. Cette même méthode ainsi que celle du réacteur à écoulement couplé à l'analyse par spectrométrie de masse et par FIL (suivi de CH3O et SO2) ont été utilisées pour l'étude de la réaction CH3SO+NO2 et de la décomposition thermique de CH3SO2. L'étude théorique de ces réactions a été effectuée au laboratoire au moyen des méthodes de chimie quantique et RRKM. Notre étude des réactions de CH3 et CH3O avec NO2 a permis la détermination des valeurs limites basse pression et haute pression des constantes de vitesse. Ces résultats contribuent ainsi à décrire précisément la dépendance en pression de ces constantes de vitesse. Les constantes de vitesse de réaction CH3SO + NO2 et de la décomposition thermique de CH3SO2 à température ambiante ont été déterminées. La décomposition spontanée de l'intermédiaire CH3SO2 a été mis en évidence expérimentalement et confirmés par calculs (ab initio et RRKM). Ce travail conduit à proposer la décomposition spontanée de CH3SO2 comme nouvelle source de SO2 dans l'oxydation atmosphérique du DMS. De tels résultats supportent ainsi l'hypothèse CLAW sur le rôle régulateur potentiel du DMS dans le climat.
3

呂明吉. "Chaso synchronization of function cascade and zero-dispersion nonlinear resonance." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/25662048222638068343.

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Анотація:
博士
國立高雄師範大學
物理學系
100
This thesis proposes two methods of synchronization control, function cascade synchronization and synchronization underlying the mechanism of zero-dispersion nonlinear resonance. For the former, we improve and design more logical controllers, and achieve the complete synchronization with fully unknown parameters for chaotic and hyperchaotic systems. AS a result of its complication, we think that it is helpful to increase the confidentiality of secret communication. For the latter, in view of ‘input and output’ of zero-dispersion nonlinear resonance, we calculate out the periodic and chaotic drivers, and achieve complete synchronization for Lorenz system. If we change the number of input signals, we will observe the phenomena of phase synchronization or phase locking. The research of zero-dispersion nonlinear resonance (ZDNR) is very interesting and valuable for application, and is a topic of worth developing.
4

Huang, Chih-Wei, and 黃志偉. "Application of CHNO Energetic Materials for the Catalytic Self-assembly of Various Nanostructures." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/29222782242837992524.

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Анотація:
碩士
高苑科技大學
化工與生化工程研究所
98
Nanomaterials possessing many unique properties with a wide range of applications are most concerned in the area of the materials science and engineering, but the complex preparation process, energy consumption and high cost are still needed to develope. Nano-structured materials have been synthesized by a self-heating detonation process using CHNO explosives (RDX, Nitroethane) for providing the need of high temperatures, high shock waves, and parts of carbon sources in the presence of metallic-containing catalysts. The detonation synthetic system can provide a unique environment and this gives a survival of the pre-fed catalyst and simultaneously a ready generation of the carbon nanomaterials. Additionally, these results experimentally used in this study show that it is possible for a cheaper process and can be as an alternative compared to these high energy and hardware intensive processes to assemble nano-sized carbon nanomaterials under catalyzed-blast process. The products of carbon nanoparticles and nano-size catalyst powders are characterized by XRD, TGA, EDX and TEM techniques. The experimental results show that the metal compounds can be converted into metallic nanoparticles due to fast decomposition with a reduction reaction after detonation and this will play an important role for the growth of different sizes of carbon nanocapsules. The morphology of carbon nanostructures varied with the reaction conditions such as types of metallic catalyst and explosive recipes of reactant composition and amounts of carbon sources. The results carried out using an explosive alone show a lot of disordered amorphous carbon with few spherical carbon nanoparticles. The addition of metallic catalyzed compounds can be selected to yield ZrO2 and CeO2 and their related catalyzed nanocapsules encapsulated in layers of graphitic carbon. The experimental results show that RDX/metallic compounds/carbon source 1:1:0.4 and 10:1:4, a majority amount of metal nanoparticles coated by several layers of graphites. However in the ratios of 30:1:12 and 50:1:20, the majority amounts of hollow carbon nanocapsule were observed. Carbon-coated nanoparticles by the use of wax are less layers compared to the use of C14H10. The use of RDX, with mach more powerful, resulting in these carbon nanoparticles consists of small particles in the rsnge of size, several nanometers to tens of nanometers together with uniform distributions. On the other hand, carbon nanocapsules obtained in this detonation process indicate that the range of particle sizes are much more larger and disorders used in these reaction system. Keywords: Catalytic Detonation, CHNO Explosives, Catalysts, Nanomaterials, XRD, TEM
5

Hsieh, Che-Yu, and 謝喆宇. "Catalytic Detonation of CHNO Energetic Materials for the Assembly of Various Carbon Nanostructures." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/24309383179329475480.

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Анотація:
碩士
高苑科技大學
高分子環保材料研究所
96
Nanomaterials have an area of intense research recently due to novel structure-related physical and chemistry properties as well as variety of significant potential applications. Nano-structured materials have been synthesized by a self-heating detonation process using CHNO explosives (TNT, CL-20) for providing the need of high temperatures, high shock waves, and parts of carbon sources in the presence of metallic-containing catalysts. The detonation synthetic system can provide a unique environment and this gives a survival of the pre-fed catalyst and simultaneously a ready generation of the Cn species. Additionally, these results experimentally used in this study show that it is possible for a cheaper process and can be as an alternative compared to these high energy and hardware intensive processes to assemble nano-sized carbon nanomaterials under catalyzed-blast process. The products of carbon nanoparticles, nanotubes and nano-size catalyst powders are characterized by XRD, TGA, SEM, EDX and TEM techniques. This research presents the use of this specially system to study the catalytic detonation process, the relationship between the experimental conditions and product distribution and roles of the catalyst types. The experimental results show that the metal compounds can be converted into metallic nanoparticles due to the fast decomposition with a reduction reaction after the detonation and this will play an important role for the growth of different size of carbon capsules. The results indicate that the change of pressure and temperature versus time need to be considered in order to fully understand or describe the nanomaterial formation by detonative decomposition techniques. The morphology of carbon nanostructures varied with the reaction conditions such as catalyst type, explosive structure ratio of reactant composition and change carbon cource. The results carried out using an explosive alone show no tubular structures but with a lot of disordered amorphous carbon with only little spherical carbon nanoparticles. The systematic of experiments indicate that metal catalysts can be selected to yield metal nanoparticles encapsulated in concentric layers of graphitic carbon. Especially when we use CHNO explosive in the ratio of (C5H5)2Fe to C14H10, 1:1:0.4, which are catalyzed by Fe, we get a majority amount of carbon-encapsules. As for Co and Ni system, give much more carbon layered encapsules with a larger metal particle in size. They straight hollow carbontube can be generated by using TNT to (C5H5)2Ni which is 1:1. However, using CL-20 to catalyst which is 1:1 can led to metal nanoparticles encapsulated in related to some derired nanotubes. The Ni-catalyzed system, on the other hand, can produce bamboo-like nano-structures, and the Fe-catalyzed system can give straight-tubular structures, with some metal nanoparticles encapsulated in special concentric layers of graphitic carbon. Such a detonation process is chemically different from the one using a pure a explosive, and of course, it facilitates practical operation to syathesis various nanostructures.
6

"Gender, Body Size, and the Prevalence of Obesity during China's Social and Economic Development." Doctoral diss., 2014. http://hdl.handle.net/2286/R.I.25810.

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abstract: The rate of obesity has increased noticeably in China since the 1980s, brought about by the "After Mao" revolution. This dissertation examines the social determinants of obesity and weight gain among men and women, using 1991-2009 waves of the longitudinal China Health and Nutrition Survey. The first study emphasizes that rapid technological adoption at home may also have the potential to lead to obesity epidemics. I hypothesize that adopting household technology is a factor in weight gain, independent from daily calorie consumption and energy expenditure in exercise. The results show household technology ownership and weight gain are linked, while changes in overall energy intake and exercise may not function as mediators for this relationship. Future public health policy may evaluate interventions that are focused on increasing low-intensity activities impacted by household technologies. My second study discusses whether obesity wage penalties seen in Western societies, such as wage reductions for obese individuals, are observed in modern China. The results indicate that obese women are not subject to wage penalties, while current male obesity rates may be worsened by heightened economic outcomes and greater social acceptance by customers and colleagues. With increasing interpersonal interactions in the workplace in Chinese industries, and the lack of public awareness of the risks of obesity, Chinese public health strategies for preventing and controlling obesity should target male non-manual laborers, the most vulnerable population in the future. The third study analyzes the impact of parental and own socioeconomic status on adult body weight and extends the research by estimating the influence of intergenerational social mobility on current body mass index. In the context of increasing social inequality in China, the study shows parental SES, own SES, and social mobility to be negatively associated with body mass index among women; while respondent's SES is positively associated with body mass index among men. The study results support the theory that parental SES has a more significant impact on current body weight for men and women after controlling social mobility; indicating that social mobility may function as a mediator for the relationship between parental SES and current body mass index.
Dissertation/Thesis
Doctoral Dissertation Sociology 2014
7

Pal, Nairita. "Cahn-Hilliard-Navier-Stokes Investigations of Binary-Fluid Turbulence and Droplet Dynamics." Thesis, 2016. http://hdl.handle.net/2005/2884.

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The study of finite-sized, deformable droplets adverted by turbulent flows is an active area of research. It spans many streams of sciences and engineering, which include chemical engineering, fluid mechanics, statistical physics, nonlinear dynamics, and also biology. Advances in experimental techniques and high-performance computing have made it possible to investigate the properties of turbulent fluids laden with droplets. The main focus of this thesis is to study the statistical properties of the dynamics of such finite-size droplets in turbulent flows by using direct numerical simulations (DNSs). The most important feature of the model we use is that the droplets have a back-reaction on the advecting fluid: the turbulent fluid affects the droplets and they, in turn, affect the turbulence of the fluid. Our study uncovers (a) statistical properties that characterize the spatiotemporal evolution of droplets in turbulent flows, which are statistically homogeneous and isotropic, and (b) the modification of the statistical properties of this turbulence by the droplets. This thesis is divided into seven Chapters. Chapter 1 contains an introduction to the background material that is required for this thesis, especially the details about the equations we use; it also contains an outline of the problems we study in subsequent Chapters. Chapter 2 contains our study of “Droplets in Statistically Homogeneous Turbulence: From Many Droplets to a few Droplets”. Chapter 3 is devoted to our study of “Coalescence of Two Droplets”. Chapter 4 deals with “Binary-Fluid Turbulence: Signatures of Multifractal Droplet Dynamics and Dissipation Reduction”. Chapter 5 deals with “A BKM-type theorem and associated computations of solutions of the three-dimensional Cahn-Hilliard-Navier-Stokes equations”. Chapter 6 is devoted to our study of “Turbulence-induced Suppression of Phase Separation in Binary-Fluid Mixtures”. Chapter 7 is devoted to our study of “Antibubbles: Insights from the Cahn-Hilliard-Navier-Stokes Equations”.

Книги з теми "CHNSO":

1

Shoujing, Yang. Suikei chūso yakuchū. Tōkyō: Tōyō Bunko, 2008.

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2

Han, Tae-su. Mul chom chuso mongmarŭyo. Sŏul: Kasŏwŏn, 1998.

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3

Takishima, Isao. Toshi to chiso kaisei. Tōkyō: Yoshikawa Kōbunkan, 2003.

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4

Sim, Sŏn-yŏng. Haengbok han cha ŭi chuso. Sŏul: Kipʻi wa Nŏlbi, 1992.

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5

Hōjō, Hiroshi. Meiji shonen chiso kaisei no kenkyū. Tōkyō: Ochanomizu Shobō, 1992.

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6

Uehara, Sakukazu. Utsuho monogatari inʾyō kanseki chūso, Dōchū saihishō. Tōkyō: Shintensha, 2005.

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7

Chʻu, Myŏng-hŭi. Kŭrium ŭi chuso: Chʻu Myŏng-hŭi sijip. 8-ме вид. Sŏul: Munhak Segyesa, 1988.

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8

Yun-suk, Hong. Nae param ŭi chuso: Hong Yun-suk sijip. Sŏul: Chayu Munhaksa, 1987.

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9

Niwa, Kunio. Chiso kaiseihō no kigen: Kaimei kanryō no keisei. Kyōto-shi: Mineruva Shobō, 1995.

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10

Niwa, Kunio. Chiso kaiseihō no kigen: Kaimei kanryō no keisei. 8th ed. Kyōto-shi: Mineruva Shobō, 1995.

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Частини книг з теми "CHNSO":

1

Vogt, J. "55 CHNSi Cyanosilylene." In Asymmetric Top Molecules. Part 1, 127. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-10371-1_57.

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2

Vogt, J. "56 CHNSi Isocyanosilylene." In Asymmetric Top Molecules. Part 1, 128. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-10371-1_58.

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3

Vogt, J. "54 CHNS Hydrogen isothiocyanate." In Asymmetric Top Molecules. Part 1, 125–26. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-10371-1_56.

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4

Kumar, M., and R. Gupta. "Magnetic anisotropy data of CHNO." In Diamagnetic Susceptibility and Magnetic Anisotropy of Organic Compounds, 323. Berlin, Heidelberg: Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-44736-8_255.

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5

Kumar, M., and R. Gupta. "Magnetic susceptibility exaltation data of CHN3O." In Diamagnetic Susceptibility and Magnetic Anisotropy of Organic Compounds, 73. Berlin, Heidelberg: Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-44736-8_5.

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6

Kumar, M., and R. Gupta. "Magnetic susceptibility exaltation data of CHN3O." In Diamagnetic Susceptibility and Magnetic Anisotropy of Organic Compounds, 74. Berlin, Heidelberg: Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-44736-8_6.

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7

Kumar, M., and R. Gupta. "Diamagnetic bulk susceptibility data of CHN3O." In Diamagnetic Susceptibility of Organic Compounds, Oils, Paraffins and Polyethylenes, 124. Berlin, Heidelberg: Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-45860-9_29.

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8

Kumar, M., and R. Gupta. "Diamagnetic bulk susceptibility data of CHN3O." In Diamagnetic Susceptibility of Organic Compounds, Oils, Paraffins and Polyethylenes, 125. Berlin, Heidelberg: Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-45860-9_30.

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9

"Map of Choso˘n Korea." In The Great East Asian War and the Birth of the Korean Nation, xiii—xvi. Columbia University Press, 2016. http://dx.doi.org/10.7312/habo17228-002.

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10

LEVITSKY, ANNE ADELE. "“Per vers o per chanso”:." In Gender and Voice in Medieval French Literature and Song, 73–92. University Press of Florida, 2021. http://dx.doi.org/10.2307/j.ctv1z9n0ww.8.

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Тези доповідей конференцій з теми "CHNSO":

1

Adel, N. Abu, F. Abdullah, H. Al-Kanderi, E. Tesiari, S. Ghafoori, M. A. Alkazimi, and W. H. Al-Bazzaz. "Artificial Intelligence Recovery Modeling of <5 API Unconventional Next-Generation Heavy Oil Using CHNSO Technology." In SPE Heavy Oil Conference and Exhibition. Society of Petroleum Engineers, 2016. http://dx.doi.org/10.2118/184096-ms.

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2

Alkhouzaam, Abedalkader Ibraheem, Hazim Qiblawey, and Majeda Khraisheh. "Synthesis of High-Antifouling and Antibacterial Ultrafiltration Membranes incorporating Low Concentrations of Graphene Oxide." In Qatar University Annual Research Forum & Exhibition. Qatar University Press, 2020. http://dx.doi.org/10.29117/quarfe.2020.0070.

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Membrane treatment for wastewater treatment is one of the promising solutions to affordable clean water. It is a developing technology throughout the world and considered as the most effective and economical method available. However, the limitations of membranes’ mechanical and chemical properties restrict their industrial applications. Graphene Oxide (GO) is one of the materials that have been recently investigated in membrane water treatment sector. In this work, ultrafiltration polysulfone (PSF) membranes with high antifouling properties were synthesized by incorporating different loadings of GO. High-oxidation degree GO had been synthesized using modified Hummers’ method. The synthesized GO was characterized using different analytical techniques including (FTIR-UATR), Raman spectroscopy, and CHNSO elemental analysis that showed high oxidation degree of GO represented by the its oxygen content (50 wt.%). Morphology and hydrophilicity of membranes were investigated using SEM, AFM and contact angle analyses and showed clear effect of GO on PSF morphology and better hydrophilicity of GO-based membranes caused by the hydrophilic nature of GO and its high oxygen content. Separation properties of the prepared membranes were investigated using a cross-flow membrane system. Biofouling and organic fouling resistance of membranes were tested using bovine serum albumin (BSA) and humic acid (HA) as model foulants. It has been found that GO based membranes exhibit higher antifouling properties compared to pure PSF. When using BSA, the flux recovery ratio (FRR %) increased from 65.4 ± 0.9 % for pure PSF to 86.9 ± 0.1 % with loading of 0.1 wt.% GO in PSF. When using HA as model foulant, FRR increased from 87.8 ± 0.6 % to 95.6 ± 4.2 % with 0.1 wt.% of GO in PSF. The pure water permeability (PWP) decreased with loadings of GO from 181.7 L.m-2.h-1.bar-1 of pure PSF to 181.1 and 167.4 L.m-2.h-1.bar-1 with 0.02 and 0.1 wt.% GO respectively. Furthermore, GO based membranes exhibited effective antibacterial performance against Halomonas aquamarina compared to pristine PSF. It can be concluded from the obtained results that incorporating low loading of GO could enhance the antifouling and antibacterial properties of PSF hence improving its lifetime and reuse.
3

Anwar, Adnan, Abdun Naser Mahmood, and Rafiqul Islam. "CHPSO-A new collaborative hybrid particle swarm optimization algorithm." In 2014 IEEE 9th Conference on Industrial Electronics and Applications (ICIEA). IEEE, 2014. http://dx.doi.org/10.1109/iciea.2014.6931454.

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4

Xiuling Zhou, Ning Mao, Chengyi Sun, and Wenjuan Li. "An improved CHSO algorithm for multi-objective optimization problem." In 2008 IEEE Congress on Evolutionary Computation (CEC). IEEE, 2008. http://dx.doi.org/10.1109/cec.2008.4631029.

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5

Cui Jia, Kong Ying, and Lu Qiang. "Performance of the China's new cooperative medical scheme: Based on CHNS data." In 2016 13th International Conference on Service Systems and Service Management (ICSSSM). IEEE, 2016. http://dx.doi.org/10.1109/icsssm.2016.7538559.

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6

Lv, Han. "The effects of family income on children’s education: An empirical analysis of CHNS data." In 2017 4th International Conference on Information Technology and Career Education. Asian Academic Press Co., Limited, 2017. http://dx.doi.org/10.24104/rmhe/2017.04.02002.

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7

Billingsley, J. P., Mark Elert, Michael D. Furnish, Ricky Chau, Neil Holmes, and Jeffrey Nguyen. "FOX-7 SPECIFIC HEAT PREDICTION FROM A PROPOSED NOMINAL∕GENERIC SPECIFIC HEAT FOR CHNO ENERGETIC COMPOUNDS." In SHOCK COMPRESSION OF CONDENSED MATTER - 2007: Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter. AIP, 2008. http://dx.doi.org/10.1063/1.2833270.

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Звіти організацій з теми "CHNSO":

1

Billingsley, James P. The Nominal/Generic Specific Heat per Average Atom Concept for CHNO Energetic Materials. Fort Belvoir, VA: Defense Technical Information Center, July 2006. http://dx.doi.org/10.21236/ada454169.

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2

Billingsley, James P. CHNO Energetic Polymer Specific Heat Prediction From The Proposed Nominal/Generic (N/G) CP Concept. Fort Belvoir, VA: Defense Technical Information Center, February 2007. http://dx.doi.org/10.21236/ada464294.

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