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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.
1

The synthesis of solid phase quenching agents and their applications in derivatisations at low analyte levels

Loader, Robert James January 1996 (has links)
No description available.
2

MICROFABRICATED CARTRIDGES FOR ISOELECTRIC FOCUSING WITH WHOLE COLUMN IMAGING DETECTION AND NANO-ELECTROSPRAY MASS SPECTROMETRY

Oyediran, Funmilayo Pelumi January 2008 (has links)
Microfluidic chips have gained wide applications in various fields, including medicine, environmental sciences and forensic investigations. They are used for the separation of proteins, blood, bacterial cell suspensions, antibody solutions, and drugs. Microfluidic chips display significant advantages, which include faster analysis time, reduced amounts of samples and reagents volumes, flexibility in design and increased separation efficiency. Whole column imaging detection (WCID) exhibits significant advantages compared to other detection methods that are widely used for detecting analytes after the separation of these analytes using isoelectric focusing. With these other methods, there is a need to mobilize the focused sample bands past the detector after separation but with WCID, there is no need for mobilization step. The aim of this research is further development of WCID by characterizing microfluidic chips fabricated for the detection system, to enhance its detection so that high efficiency can be obtained. The chips were fabricated using soft lithography technology at the Microfluidic laboratory, University of Waterloo and they were used to perform isoelectric focusing of various proteins in our laboratory. The fabricated chips with straight channel design were used to carry out isoelectric focusing of some proteins and the results obtained were compared with the results obtained using commercial cartridges. The chips with tapered channel design were used to carry out isoelectric focusing of proteins in which thermally generated pH gradient principle was employed. The samples after separation were sprayed into a mass spectrometer using nano-electrospray interface to obtain their molecular masses. Compatible cartridges for nano-electrospray mass spectrometer were developed and these cartridges were used to carry out capillary isoelectric focusing of low molecular pI markers and proteins. These cartridges were also connected to the nano-electrospray mass spectrometer to obtain the mass to charge ratios of some proteins. The fabricated microfluidic chips with straight channel design were also used to investigate the interaction between drugs and protein.
3

MICROFABRICATED CARTRIDGES FOR ISOELECTRIC FOCUSING WITH WHOLE COLUMN IMAGING DETECTION AND NANO-ELECTROSPRAY MASS SPECTROMETRY

Oyediran, Funmilayo Pelumi January 2008 (has links)
Microfluidic chips have gained wide applications in various fields, including medicine, environmental sciences and forensic investigations. They are used for the separation of proteins, blood, bacterial cell suspensions, antibody solutions, and drugs. Microfluidic chips display significant advantages, which include faster analysis time, reduced amounts of samples and reagents volumes, flexibility in design and increased separation efficiency. Whole column imaging detection (WCID) exhibits significant advantages compared to other detection methods that are widely used for detecting analytes after the separation of these analytes using isoelectric focusing. With these other methods, there is a need to mobilize the focused sample bands past the detector after separation but with WCID, there is no need for mobilization step. The aim of this research is further development of WCID by characterizing microfluidic chips fabricated for the detection system, to enhance its detection so that high efficiency can be obtained. The chips were fabricated using soft lithography technology at the Microfluidic laboratory, University of Waterloo and they were used to perform isoelectric focusing of various proteins in our laboratory. The fabricated chips with straight channel design were used to carry out isoelectric focusing of some proteins and the results obtained were compared with the results obtained using commercial cartridges. The chips with tapered channel design were used to carry out isoelectric focusing of proteins in which thermally generated pH gradient principle was employed. The samples after separation were sprayed into a mass spectrometer using nano-electrospray interface to obtain their molecular masses. Compatible cartridges for nano-electrospray mass spectrometer were developed and these cartridges were used to carry out capillary isoelectric focusing of low molecular pI markers and proteins. These cartridges were also connected to the nano-electrospray mass spectrometer to obtain the mass to charge ratios of some proteins. The fabricated microfluidic chips with straight channel design were also used to investigate the interaction between drugs and protein.
4

Návrh konstrukce vibrační třídičky odpadu / Design of vibrating waste sorter

Taska, Abraham January 2016 (has links)
The master thesis deals with a construction proposal for a vibrating sorter of cartridges. The thesis contains the theoretical part characterizing various sorter types of cartridges and describes the principle of sorting with the help of the vibrating sorters. The practical part includes a draft of a drive, calculation of a vibrating sorter, a proposal of compression springs bearing vibration frame and a control calculation of these springs. A complete vibrating sorter of the cartridges is created in a 3D modeling program. The thesis is attached by the drawings of the individual assemblies, subassemblies and individual parts.
5

Evaluation of Membrane Treatment Technology to Optimize and Reduce Hypersalinity Content of Produced Brine for Reuse in Unconventional Gas Wells

Eboagwu, Uche 2011 August 1900 (has links)
Over 18 billion barrels of waste fluids are generated annually from oil and gas production in the United States. As a large amount of water is used for oilfield operations, treating and reusing produced water can cut the consumption of fresh water in well sites. This research has helped to develop a membrane process train for a mobile produced water treatment unit for treating oilfield produced brine for reuse. To design the process train, over 30 sets of combination tests at pilot laboratory scale were performed using pretreatment, microfiltration and nanofiltration processes. Membrane performance was selected based on high flux separation efficiency, high tolerance for solids and fluid treatments. Over 95 % solids rejection and greater than 80 % oil removal efficiency were obtained in all these tests. Process train (pre-treatment and membrane) performance was monitored by chemical analysis of permeate and models fitting experimental data for the process. From the results, hydrocarbon rejection was analyzed; total organic carbon rejection was 47.9 %, total carbon content averaged 37.3 % rejection and total inorganic carbon rejection was at 3.66 %. BTEX removal efficiency ranged from 0.98 % to 52.7 % with the progressive pretreatment methods of using cartridge filters. The nanofiltration membrane showed significant reduction in total dissolved solids and in both anionic and cationic species. The process train is seen to follow a sequence of treatment from cartridge and oil removal filter treatment to microfiltration treatment to ultrafiltration, followed by nanofiltration for the purpose of this research. Further research still needs to be done on to determine the kind of analytical test which will give real time feedback on effectiveness of filters. In summary, the process train developed by TAMU-GPRI possesses distinct advantages in treating oilfield produced brine using membrane technology. These advantages include high quality of permeate, reduced sludge and the possibility of total recycle water systems. The small space requirement, moderate capital costs and ease of operation associated with the use of the mobile unit membrane technology also makes it a very competitive alternative to conventional technologies.
6

Rozpoznávání markantních rysů na nábojnicích / Recognition of Unique Features on Weapon Cartridges

Siblík, Jan January 2010 (has links)
Subject of this thesis is design and implementation of an algorithm, capable of distinct feature based comparision of two weapon cartridge casing  images. In the first section it looks into the issue of fi- rearms with special emphasis on ballistic traces. In following parts it presents design and imple- mentation of scanning unit for acquisition of such images and their processing and design and excuti- on of the comparation algorithm. In the conclusion there is an evaluation of goals achieved and possi- bilities for further development.
7

Přeprava výrobků firmy Česká zbrojovka a s. / Transportation of products of Česká zbrojovka a.s.

Gromanová, Monika January 2013 (has links)
The diploma thesis deals with the issue of international transportation of products traded by Česká zbrojovka a.s., concentrating specifically on air and sea transportation. The main focus is on the transport of products destined for the automotive industry and on the transport of weapons and cartridges. The first theoretical part deals with air and sea transport, transport of dangerous goods and the International Commercial Terms (INCOTERMS). The second practical part examines separate transports of these products. In the end of this practical part are these concrete examined transports compared.

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