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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Qualidade física, química e antimicrobiana de sabões líquidos elaborados com óleo residual de fritura e diferentes agentes saponificantes / Quality physics, chemistry and antimicrobial of liquid soaps prepared with residual oil frying and different agents saponificants

Herranz, Andressa Pasini 04 March 2013 (has links)
Submitted by Luciana Ferreira (lucgeral@gmail.com) on 2015-05-22T11:49:48Z No. of bitstreams: 2 Dissertação - Andressa Pasini Herranz de Carvalho - 2013.pdf: 4440445 bytes, checksum: 9c8760635007ecd17af9fe33a5ee57e1 (MD5) license_rdf: 21267 bytes, checksum: 73e23c2acaaf13389e092bd813e3223d (MD5) / Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2015-05-22T11:51:56Z (GMT) No. of bitstreams: 2 Dissertação - Andressa Pasini Herranz de Carvalho - 2013.pdf: 4440445 bytes, checksum: 9c8760635007ecd17af9fe33a5ee57e1 (MD5) license_rdf: 21267 bytes, checksum: 73e23c2acaaf13389e092bd813e3223d (MD5) / Made available in DSpace on 2015-05-22T11:51:56Z (GMT). No. of bitstreams: 2 Dissertação - Andressa Pasini Herranz de Carvalho - 2013.pdf: 4440445 bytes, checksum: 9c8760635007ecd17af9fe33a5ee57e1 (MD5) license_rdf: 21267 bytes, checksum: 73e23c2acaaf13389e092bd813e3223d (MD5) Previous issue date: 2013-03-04 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES / The residual oils obtained from the process of frying food are considered hazardous waste by the ministry of environment, due to their degradative nature when improperly discarded in soil and groundwater. Thousands of tons of this waste are produced daily across the country, and more than half are discarded improperly, because no public policies that encourage proper disposal and even recycling of these oils. Soaps are carboxylic salts can be made from these wastes, becoming an alternative to the recycling of frying oils, promoting sustainable development. Liquid soaps are widely used either as cleaning products or toiletries, however the use of frying oils in these products, delimits the knowledge still popular, with little initiative industries in marketing these products. Therefore, this work was developed with the aim to formulate liquid soaps with residual oil in a frying food industry, different pHs (8, 10, 12 and 14) and saponified by different bases (KOH / NaOH). The soaps were evaluated for their technological qualities, divided into physical (foaming ability, solubility, viscosity and cleaning), chemical properties (acidity and alkalinity free) and microbiological (minimal inhibitory concentration for E. coli and S. aureus). The two tests with liquid soaps KOH or NaOH, were processed under mechanical stirring and soaps obtained at pH 8, 10, 12 and 14 using KOH or HCL / NaOH to correct pH. Liquid soaps with KOH showed characteristics less viscous than treatments with NaOH (propensity for solidification) confirming the better employment of this base in the production of liquid soaps. The cleaning power of soaps with KOH and NaOH was similar (yield around 93% of the ability to clean greasy surfaces to soiling 87% with low levels of fats), increasing with an increase in pH of the formulations. Liquid soaps with KOH and NaOH, showed good ability of foaming, however the best solubilization capacity (water, ethanol, methanol, acetone and petroleum ether), was acquired with soaps with KOH (pH 10, 12 and 14), soaps pH 8 were sparingly soluble in both assays (KOH / NaOH). The antibacterial analysis, through minimum inhibitory concentration showed that soaps with NaOH able to inhibit the cultivation of S. aureus and E. coli, a smaller amount (6.25 and 25%, respectively) than the soap with KOH (at least 50% of soap and 100). The kinetic model that best fit the values obtained for pH was processing the first order. Both trials evaluated had technological characteristics favorable for their marketing, with soaps with more alkaline pH may be intended for industrial use, since its high pH does not allow it to be handled by untrained people. Soaps with lower pHs (8, 10), may be destined for domestic or commercial, allowing a good efficiency of their application. / Os óleos residuais obtidos do processo de frituras de alimentos são considerados resíduos perigosos pelo ministério do meio ambiente, devido a sua natureza degradativa quando descartados incorretamente, nos solos e águas. Milhares de toneladas deste resíduo são produzidos diariamente em todo o país, sendo que mais da metade é descartada de maneira incorreta, por não haver políticas públicas que incentivem o descarte correto e até mesmo a reciclagem destes óleos. Os sabões são sais carboxílicos que podem ser produzidos a partir destes resíduos, tornando-se uma alternativa para a reutilização dos óleos de frituras, favorecendo o desenvolvimento sustentável. Os sabões líquidos, são amplamente utilizados, seja como produtos de limpeza ou de higiene pessoal, entretanto a utilização dos óleos de frituras nestes produtos, ainda se delimita à conhecimentos populares, com pouca iniciativa das indústrias em comercializar estes produtos. Neste contexto este trabalho foi desenvolvido, com o objetivo de formular sabões líquidos com óleo residual de fritura de uma indústria alimentícia, de diferentes pHs (8, 10, 12 e 14) e saponificados por diferentes bases (KOH/ NaOH). Os sabões foram avaliados quanto às suas qualidades tecnológicas, dividas em físicas (capacidade de formação de espuma, de solubilidade, de limpar e viscosidade), químicas (alcalinidade e acidez livre) e microbiológicas (concentração inibitória mínima para E. coli e S. aureus). Os dois ensaios de sabões líquidos com KOH ou NaOH, foram processados sob agitação mecânica e obtidos sabões com pH 8, 10, 12 e 14 utilizando-se HCL ou KOH/ NaOH para corrigir os pHs. Os sabões líquidos com KOH apresentaram características menos viscosas do que os tratamentos com NaOH (propensão à solidificação) confirmando a melhor empregabilidade desta base na produção de sabões líquidos. O poder de limpeza dos sabões com KOH e NaOH foi similar (obtendo ao redor de 93% de capacidade de limpar superfícies gordurosas 87% para sujidades com baixos teores de gorduras), aumentando conforme houve um aumento do pH das formulações. Os sabões líquidos com KOH e NaOH, apresentaram boa capacidade de formação de espuma, entretanto a melhor capacidade de solubilização (água, etanol, metanol acetona e éter de petróleo), foi adquirida com os sabões com KOH (pH 10, 12 e 14), os sabões de pH 8 foram limitadamente solúvel nos dois ensaios (KOH / NaOH). A análise antimicrobiana, por meio da concentração inibitória mínima, mostrou que os sabões com NaOH conseguiram inibir as culturas de S. aureus e E. coli, em quantidade menores (6,25 e 25% respectivamente) do sabão do que os com KOH (mínima de 50 e 100% do sabão). O modelo cinético que melhor se ajustou aos valores obtidos para o pH do processamento foi o de primeira ordem. Os dois ensaios avaliados apresentaram características tecnológicas favoráveis para a sua comercialização, sendo que os sabões com pHs mais alcalinos podem ser destinados para uso industrial, já que seu pH elevado não permite que seja manipulado por pessoas não treinadas. Os sabões com pHs menores (8 e 10), podem ser destinados para o uso doméstico ou comercial, permitindo uma boa eficiência de sua aplicação.
12

Rod (von) Hardtmuth / Family (von) Hardtmuth

Klímová, Jana January 2013 (has links)
This diploma thesis Family (von) Hardmuth focuses on the life of a business family from České Budějovice since the end of the 18th century until the end of the World War II. The goal of the thesis is not only a biographical study, but it also takes into consideration the process of the dynasty's social growth, initiated by a Liechtensteiner noble architect Joseph Hardtmuth, and the establishment among the city's and new aristocratic elites. This is why the study also deals with the marriage policy and public activities of the family. Therefore, in every generation we can observe a gradual avoiding the lower status society, the owners trying to symbolize fathers of the workers (parallel to the posititon of the emperor in relation to the nation), the adaptation to the aristocratic way of life, but also the national tension both in České Budějovice and the whole monarchy. The thesis also concentrates on the establishment of pencil factories and national advertising campaigns since the turn of the 19th and 20th century until the end of the World War II. The aim of the study is to contribute to the research of the German city's and new aristocratic elites, whose lives, compared to their Czech companions, have not been examined sufficiently until now.
13

Finační a strategická analýza podniku společnosti KOH -I- NOOR Hardmuth a.s / Financial and strategic analysis of Koh-i-noor Hardtmuth, a.s.

Štěpán, Jakub January 2009 (has links)
The final thesis focuses on strategic and financial analysis of the Koh-i-noor Hardtmuth, a.s. providing relevant information for financial plan and final evaluation of the company. The first part of the thesis briefly describes the company. The following part focuses on financial performance of the company, whilst the third part rates the propriate market as well as risks and opportunities of the company. The conclusion of the final thesis comprises three different income scenarios.
14

Produ??o do carv?o ativado a partir do mesocarpo do coco-da-ba?a (cocosnuciferalinn) utilizando H3PO4, CH3COONa e KOH como ativantes

Morais, Everaldo Dantas de 09 June 2014 (has links)
Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-04-24T18:34:01Z No. of bitstreams: 1 EveraldoDantasDeMorais_DISSERT.pdf: 6462508 bytes, checksum: 7b74d62bf4dde779bb8c90f7ed70caca (MD5) / Approved for entry into archive by Monica Paiva (monicalpaiva@hotmail.com) on 2017-04-24T18:37:49Z (GMT) No. of bitstreams: 1 EveraldoDantasDeMorais_DISSERT.pdf: 6462508 bytes, checksum: 7b74d62bf4dde779bb8c90f7ed70caca (MD5) / Made available in DSpace on 2017-04-24T18:37:49Z (GMT). No. of bitstreams: 1 EveraldoDantasDeMorais_DISSERT.pdf: 6462508 bytes, checksum: 7b74d62bf4dde779bb8c90f7ed70caca (MD5) Previous issue date: 2014-06-09 / Atualmente a preocupa??o com o meio ambiente tem impulsionado o desenvolvimento de novas tecnologias capazes de minimizar o impacto causado pelo homem. A utiliza??o do mesocarpo do coco-da-ba?a para produ??o de carv?o ativado reduz o impacto ambiental por ele causada. O presente trabalho pretende produzir e ativar o carv?o gerado a partir mesocarpo do coco-da-ba?a com ?cido fosf?rico (H3PO4), hidr?xido de pot?ssio (KOH) e acetado de s?dio (CH3COONa) em concentra??es variadas avaliando-os em duas faixas de granulometria: retido em 48 Mesh e passante de 325 Mesh, assim como caracteriz?-los atrav?s do ?ndice de azul de metileno e de microscopia eletr?nica de varredura (MEV). Foi realizada a adequa??o das curvas de adsor??o ao modelo de Langmuir. / Atualmente a preocupa??o com o meio ambiente tem impulsionado o desenvolvimento de novas tecnologias capazes de minimizar o impacto causado pelo homem. A utiliza??o do mesocarpo do coco-da-ba?a para produ??o de carv?o ativado reduz o impacto ambiental por ele causada. O presente trabalho pretende produzir e ativar o carv?o gerado a partir mesocarpo do coco-da-ba?a com ?cido fosf?rico (H3PO4), hidr?xido de pot?ssio (KOH) e acetado de s?dio (CH3COONa) em concentra??es variadas avaliando-os em duas faixas de granulometria: retido em 48 Mesh e passante de 325 Mesh, assim como caracteriz?-los atrav?s do ?ndice de azul de metileno e de microscopia eletr?nica de varredura (MEV). Foi realizada a adequa??o das curvas de adsor??o ao modelo de Langmuir.
15

Studies on Direct Ammonia Fuel Cells Employing Anion Exchange Membranes / アニオン交換膜を適用した直接アンモニア燃料電池に関する研究

Suzuki, Shohei 23 March 2016 (has links)
京都大学 / 0048 / 新制・課程博士 / 博士(工学) / 甲第19731号 / 工博第4186号 / 新制||工||1646(附属図書館) / 32767 / 京都大学大学院工学研究科物質エネルギー化学専攻 / (主査)教授 江口 浩一, 教授 安部 武志, 教授 阿部 竜 / 学位規則第4条第1項該当 / Doctor of Philosophy (Engineering) / Kyoto University / DGAM
16

Development of Fast Activation Method using Microwave-Induced Plasma for Preparation of High-Surface-Area Activated Carbon / 高表面積活性炭合成のためのマイクロ波プラズマを活用した迅速賦活法の開発

Kuptajit, Purichaya 24 September 2021 (has links)
京都大学 / 新制・課程博士 / 博士(工学) / 甲第23517号 / 工博第4929号 / 新制||工||1769(附属図書館) / 京都大学大学院工学研究科化学工学専攻 / (主査)教授 佐野 紀彰, 教授 宮原 稔, 教授 河瀬 元明 / 学位規則第4条第1項該当 / Doctor of Philosophy (Engineering) / Kyoto University / DFAM
17

Technologie leptání křemíku / The silicon etching technology

Krátký, Stanislav January 2012 (has links)
This thesis deals with the silicon etching technology. It Examines using of water solution of potassium hydroxide. It focuses on plasma etching of silicon using mixture of CF4 and O2 as the dry way of etching. Important parameters of etching like etching rate of silicon and masking materials, etching selectivity, surface roughness and underetching of mask are determined for both ways. Some additional processes has been examined as well, namely creating of mask of resist and silicon dioxide, lithography process and etching of resist using oxygen plasma.
18

Ocenění společnosti Koh-i-noor Hardmuth, a.s. / Valuation of the company KOH-I-NOOR HARDTMUTH a.s.

Zákutná, Monika January 2010 (has links)
The aim of this thesis is to determine the market value of the company KOH-I-NOOR HARDTMUTH a.s. from publicly available information from the perspektive of an unspecified buyer. Financial and strategic analysis were made on the basis of the company data for 2005 -- 2009. Based on the coclusion of the analysis was set the financial plan for the next 5 years. Because the firm meets the assumption of so-called going concern principle, the resulting equity value was determined by income based methods, discounted cash flow and net income capitalized.
19

Československý tužkárenský průmysl v centrálně řízeném hospodářství 1948-1968

BOHDÁLEK, David January 2019 (has links)
The submitted doctoral thesis focuses on the development and transformation of the Czechoslovak pencil industry in the period after the onset of the planned economy. The major pencil manufacturer Koh-I-Noor Hardtmuth was at the heart of the analysis. The annual reports, annual financial statements, business trip reports, and minutes of the director's and production meetings formed the source base. The correspondence with individual domestic institutions or foreign business partners, memories and a company magazine were also used. The preserved image archival documents - promotional leaflets and price lists - were not left out. The work is based on the methodological basis of the business history. The organization, operation and management strategies of the pencil industry in the historical background of economic changes and reforms have become the subject to examination. The national enterprises Centropen, Gama and Logarex, which were engaged in the production of office supplies, were also included into the research in terms of the comparison. The emphasis was placed on the role of individual managers conducting entrusted enterprises next to the analysis of turnover, production level and a number of employees. Advertising and promotional activities and their importance in the socialist economy was not left behind. In this context, the impact of extensive litigation regarding the trade mark and the name of Hardtmuth, which affected the export, production and advertising sectors, have not been overlooked. The interrelationship between the manufacturing enterprise and export organizations became one of the key topics.
20

Zero-level Packaging Of Microwave And Millimeter-wave Mems Components

Comart, Ilker 01 September 2010 (has links) (PDF)
This thesis presents realization of two shunt, capacitive contact RF MEMS switches and two RF MEMS SPDT switches for microwave and millimeter-wave applications, two zero-level package structures for RF MEMS switches and development trials of a BCB based zero level packaging process cycle. Two shunt, capacitive contact RF MEMS switches for 26 GHz and 12 GHz operating frequencies are designed, fabricated and consistencies between fabricated devices and designs are shown through RF measurements. For the switch design at 26 GHz and at the operating frequency, return loss in the upstate is measured to be 27.61 dB, insertion loss and isolation in the downstate is measured to be 0.21 dB and 27.16 dB, respectively. For the switch design at 12 GHz and at the operating frequency, return loss in the upstate is measured to be 38.69 dB, insertion loss and isolation in the downstate is measured to be 0.05 dB and 25.84 dB, respectively. Quite accurate circuit models have been obtained for both of the RF MEMS switches. Two RF MEMS SPDT switches, which utilize the shunt, capacitive contact switches as building blocks are designed through circuit simulations. These two designs are fabricated and their RF measurements have been completed. It is shown from circuit model simulations that, the performances of the fabricated devices and desired responses corresponded to each other. For the SPDT switch design at 26 GHz, return loss at the input port is measured to be 12 dB and insertion loss is measured to be 1.24 dB. For the SPDT switch design at 12 GHz, return loss at the input port is measured to be 5.6 dB and insertion loss is measured to be 0.49 dB. The reason behind the unexpectedly bad performances has been investigated and discovered. The bad performances were due to a common mistake in the layouts of both SPDT switches. These mistakes are corrected in the circuit models and expected performances are obtained. Two different zero-level package structures which use high-resistive Si wafers have been suggested and required design changes have been made on the RF MEMS shunt, capacitive contact switches and SPDT switches in order to minimize the package effects. For this purpose polygonal CPW transitions have been designed and integrated into the designs, followed by the necessary tunings in the switch structures for which EM and circuit simulations are utilized. For the suggested package structures to be produced, two possible process cycles have been studied. One of the process flows was based on KOH anisotropic Si etching and the other one was based on DRIE (Deep Reactive Ion Etching). Great progress has been achieved in the latter process cycle, however this process cycle still needs some more study and it could not be completed in the time required for this thesis study.

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