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A two-stage reduction for complex combustion chemistryHuynh, Phong Tien. January 2008 (has links)
Thesis (M.S.)--Rutgers University, 2008. / "Graduate Program in Chemical and Biochemical Engineering." Includes bibliographical references (p. 64-67).
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Liver-intestine cadherin (CDH17) in hepatocellular carcinoma molecular analysis and clinical implications /Zhu, Rui, January 2009 (has links)
Thesis (Ph. D.)--University of Hong Kong, 2010. / Includes bibliographical references (leaves 157-170). Also available in print.
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Pentosidine as a biomarker for age in birds and museum prepared study skinsFallon, Jesse A. January 1900 (has links)
Thesis (M.S.)--West Virginia University, 2004. / Title from document title page. Document formatted into pages; contains v, 70 p. : ill. Includes abstract. Includes bibliographical references.
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Chemical genetics to study how cells enter mitosisMarco-Casanova, Paola January 2012 (has links)
No description available.
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Rapid toxicity assessment using ingestion rate as a sublethal biomarkerJuchelka, Charlotte Milada 05 1900 (has links)
No description available.
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A STUDY OF POLYMER-SMALL MOLECULE INTERACTIONS FOR SOLID-LIQUID TWO PHASE PARTITIONING BIOREACTORS WITH EMPHASIS ON THE BIOPRODUCTION OF 2-PHENYLETHANOLGAO, FANG 02 July 2009 (has links)
Biphasic systems have been studied for in situ product removal (ISPR), and have shown improvements in bioreactor performance. With immiscible solvents, concerns associated with solvent biocompatibility, bioavailability and operation have been identified. One alternative is a solid-liquid system in which polymer beads are used, absorbing and removing target compounds from the aqueous phase while maintaining equilibrium conditions. In such systems, the capability of a polymer to absorb the compound of interest is an important parameter. This work has identified polymer properties that may be important to the interaction between polymers and target compounds for selected biotransformation molecules including 2-phenylethanol, cis-1,3-indandiol, iso-butanol, succinic acid and 3-hydroxybutyrolactone. Furthermore, the biotransformation from L-phenylalanine to 2-phenyethanol, an important aroma compound in industry, was examined in detail.
It was found that relatively hydrophobic compounds tend to be absorbed by polymers better than hydrophilic ones based on partition coefficient tests. Since all of the biotransformation molecules tested have polar functional groups such as alcohol, acid and lactone, polar polymers such as Hytrel® performed better than non-polar polymers such as Kraton® possibly due to the hydrogen-bonding interaction between the polymer and the solute. Crystallinity and intermolecular hydrogen-bonding were also found to be important polymer properties.
Hytrel® 8206 was identified as the best working polymer to absorb 2-phenylethanol. A solid-liquid batch mode two phase partitioning bioreactor (TPPB) with 500 g Hytrel® generated an overall 2-PE concentration of 13.7 g/L, the highest reported in the current literature. This was based on a polymer phase concentration of 88.74 g/L and aqueous phase concentration of 1.2 g/L. Better results were achieved via contact with more polymers with the aqueous phase applying a semi-continuous reactor configuration. In this system, a final 2-PE concentration (overall) of 20.4 g/L was achieved. The overall productivities of these two reactor systems were 0.38 g/(L-h) and 0.43 g/(L-h), respectively. This experiment successfully demonstrated that with the appropriate selection of polymer, solid-liquid TPPB systems were able to greatly enhance bioproductions associated with end product inhibition in terms of final product concentration and productivity. The ease of operation is also attractive compared to two liquid phase systems. / Thesis (Master, Chemical Engineering) -- Queen's University, 2009-07-02 11:37:33.83
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The Biochemical Characterization of the ATPase activity of three Hsp82 point mutants: Hsp82pA587T, Hsp82pG313S, and Hsp82pE381KMai, BaoChan N Unknown Date
No description available.
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PRODUCTION OF LACCASE BY THE WHITE - ROT FUNGUS PYCNOPORUS SANGUINEUS.van der Merwe, Johannes Jacobus 23 March 2004 (has links)
ABSTRACT
White-rot fungi and their enzymes are receiving increasing attention for
biotechnological applications in the pulp and paper industry as alternatives to
conventional bleaching. Laccase has been identified as one of the enzymes that plays
a major role in lignin degradation. Laccase only attacks phenolic subunits of lignin,
but its substrate range can be extended to non-phenolic subunits by the inclusion of a
mediator. The use of this enzyme was, therefore, not successful in pulp bleaching
trials until the discovery of mediators. Although the existence of natural mediators
has not been confirmed, various components have been identified that are able to act
as mediators. Improved methods of laccase production could benefit the industrial
utilisation of the enzyme. White-rot fungi constitutively produce low concentrations
of laccase, but higher concentrations can be obtained with the inclusion of inducers in
the cultivation media. The enzyme is mainly produced during the stationary growth
phase of the fungi, but various factors such as glucose, nitrogen and pH can influence
levels of laccase production. The enzyme does not only hold potential for biological
pulp bleaching operations, but also has application in bioremediation, the textile dye
industry as well as the food and beverage industries.
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YEAST DIVERSITY IN BLUE MOULD RIPENED CHEESES .Human, De Jager Paul 23 March 2004 (has links)
YEAST DIVERSITY IN BLUE MOULD RIPENED CHEESES.
ABSTRACT
During the ripening process of blue veined cheese, different microbial groups interact
and contribute to the final product. One of the most important of these groups are yeast.
Further studies are needed to clarify their specific contribution to the ripening process.
In order to accomplish this, a suitable and satisfactory enumeration medium is needed.
Consequently, ten selective media were evaluated for their potential to inhibit and
suppress the growth of moulds and bacteria without affecting the yeasts. Based on
statistically compared data, no significant difference could be found amongst the ten
media, except for one. Further studies were performed on the three media considered
to be the most effective, MEA + Ox, MEA + NaCl and MEA + BP based on qualitative
results. Accordingly, the three selected media were evaluated based on their ability to
support the growth of the five most frequently occurring yeast species in blue veined
cheese. No significant difference was obtained between two of the three media. MEA +
NaCl however, was unable to support the growth of two of the five most dominant yeast
species. MEA + Ox and MEA + BP proved to be superior for the enumeration and
isolation of yeasts from blue veined cheese. DRBC, RBC and DG18 proved satisfactory
regarding the enumeration of yeasts, whereas OGGY, MEA + SP and molybdate
containing media are not recommended.
Key words: Selective media, Yeasts, Moulds, Enumeration
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DEVELOPMENT AND APPLICATION OF A SMALL-SCALE CANNING PROCEDURE FOR THE EVALUATION OF SMALL WHITE BEANS (PHASEOLUS VULGARIS).Van Loggerenberg, Magdalena 16 May 2005 (has links)
Laboratory canning and evaluation of dry beans are common practices for testing
canning quality of cultivars before commercial release to canning industries. Suitable
laboratory canning and evaluation procedures for small white beans in tomato sauce
were identified. Standard values for choice and standard grade beans for laboratory
evaluation of canning quality were defined, using four small white bean cultivars
from nine localities during the 2000/01 season. The cultivar Teebus was used as
reference standard for choice grade beans and its canning quality complied with
international guidelines when the modified canning technique (MCT) was used. From
the laboratory and modified canning evaluation procedures hydration coefficient,
percentage washed drained weight, visual appearance (scale 1 to 10), splits (scale 1 to
10), texture (kg.100 g -1 .12 s -1 ), size, clumping, L-values, aL-values and bL-values were
identified as suitable canning parameters for small scale evaluation of beans.
Beans canned with the MCT were also canned and evaluated industrially and results
compared. The interpretation of the different canning parameters with laboratory and
industrial canning were simplified by the use of canonical variate analysis (CVA).
Canonical variate analysis indicated the same groupings for cultivars according to
choice and standard grade canning quality for laboratory and industrial canned beans.
Laboratory canning and evaluation could be used in the evaluation of the canning
quality of beans intended for industrial canning.
Canning quality of seven small white bean cultivars from 33 localities and two
seasons was determined with the MCT and CVA. Cultivars with acceptable and
unacceptable canning quality were identified using laboratory evaluation and CVA.
The CVA resulted in a prediction model for canonical variates 1 and 2 (CV 1 and
CV 2) by identifying two discriminative equations for CV 1 and CV 2 scores. The
CVA for environments identified differences in the canning quality of beans from
different regions, while also indicating seasonal differences. The canning quality of
dry bean cultivars from different environments can be determined using CVA.
The model equations for the prediction of the canning quality of small white beans
were validated on four cultivar samples from four regions (2000/01 season) and 24 breeding samples from three localities (2002/03 season) that were not included in the
development of the model. The CVA and the model identified the same entries from
breeding trials over localities not to be significantly different from Teebus (P > 0.05)
in canning quality, but were unable to group cultivars statistically correct according to
choice grade. The model was however capable of grouping standard and choice grade
cultivars separately. The model could be applied to identify breeding trial entries as
choice grade and to identify entry x locality interactions.
The use of small-scale canning and evaluation procedures in combination with CVA
could be employed to classify cultivar canning quality as either choice- or standard
grade and to determine environmental canning quality. These techniques could be
used, with the assistance of the prediction model to compare samples from a breeding
program with a reference standard.
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