Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 16 of 16 for “"Methoxyl"”.
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The Displacement of Methoxyl Groups in Hindered Aryl Ketones and Anils Bythe Action of Grignard Reagents
Made available in DSpace on 2014-12-05T19:36:27Z (GMT). No. of bitstreams: 1 0018184.pdf: 3377268 bytes, checksum: 270bf289aca395c2a1bc9adb52bf3739 (MD5) Previous issue date: 1956
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Impact of lignification of corn stover fractions on cell wall degradation by rumen microorganisms and response to ammonia treatment
… and arabinan:xylan, and lower lignin methoxyl content. A hypothesis of formation of reactive quinone methide intermediates from lignin during rumen fermentation was tested in vitro by incubating corn stover fractions with S-containing reducing agents. Sulphur incorporation into …
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Desenvolvimento e otimização do processo de extração de pectina a partir do resíduo de maracujá da caatinga (Passiflora cincinnata Mast.) utilizando tecnologia do ultrassom de alta intensidade
… yield observed was approximately 10.7% low-methoxyl (LM) pectin after 15 minutes of sonication using a 1:30 SLR. After fixing these variables, further optimization and validation studies led to yields of approximately 7.5% high methoxyl (HM) pectin in a 75% duty cycle, ultrasound amplitude …
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Initial Studies on a Novel Target-Promoted DNA Alkylation System
… QM precursor. Three alkylation model systems (methoxyl polycyclic system, intramolecular hydrogen bonding system and biaryl system) were proposed and synthesized. The potential DNA QM alkylation was investigated by deoxyadenosine (dA) and deoxyguanosine (dG) alkylation with the biaryl system. …
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Synthesis and SAR study of Meperidine Analogues as Selective Serotonin Reuptake Inhibitors (SSRIs)
… Benzyl ester analogues included 4-nitro, 4-methoxyl and 3,4-dichloro benzyl analogues and exhibited high potency for serotonin transporters and high selectivity over the dopamine transporter (DAT) and the norepinephrine transporter (NET). Also the N-demethylated analogues improve the binding …
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The study of proton-donor proton-acceptor interactions by infrared spectroscopy and computer modelling
… spectra of acetic, propionic, butyric, benzoic, omethoxyland o-ethoxy benzoic, p-methoxyl and p-ethoxybenzoic and o-acetyl salicylic acids was studied in CCl^.The effect of inter and intramolecular hydrogen-bonding is discussed. Models of monomer and dimer carboxylic acids were constructed using …
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Lignin acrylate derivatives and their behaviors in free radical copolymerizations
… by UV for GIU-co-MMA and HPGIU-co-MMA, while methoxyl content determination by HI-GC was used to determine compositions of styrene-based copolymers. The copolymers were characterized by gel permeation chromatography (GPC), and by IR and NMR spectroscopy. The reactivity ratios were computed by …
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Characterisation of novel alpha1-adrenoceptor ligands
… compounds for α1A over α1B-AR, methyl (Me) and methoxyl (OMe) substituted analogues of C2 and C7 were produced. The substituted compound, 8-Me C2 showed selectivity for the α1A-AR over all other tested receptors, while 6-Me C2, 6-Me C7, and 7-OMe C7 were selective for the α1B-AR over all other …
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Glycan characterizations with application in metal ion binding, the 1918 influenza virus neuraminidase formation and human receptors
… ) to reveal the antenna sequence, and natural methoxyl group location; (c) negative ion CID-MSn on native glycans to define general antennary topology. Three major complex-type N-glycans were characterized with two of them expressing an unique tetrasaccharides antenna sequence: …
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Quantum transport through conjugated organic molecular junctions
… chemical structures. In chapter 5, I demonstrate methoxyl groups (-OMe) induce destructive quantum interference (DQI) tuning in meta-phenylene ethylene-type oligomers (mOPE). My calculation reveals that the conductance of single molecules with -OMe pendant groups is sensitive to the position of …
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Reconstruction of milk fat globules/membrane (MFGs/MFGM) and characterization of its physicochemical properties and techno-functionalities
… Additionally, anionic polysaccharide- high-methoxyl pectin (HMP) was incorporated to the raw milk before the cream separation, examining the resulting physicochemical properties and techno-functionalities. Results indicated that pH adjustment affected the MFGs structure and MFGM protein …
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Investigation of methods for reducing aflatoxin contamination in distillers grains
… and lactone rings, and cyclopantenone and methoxyl structures. These should pose less of a risk to biological activity than AFB 1 according to their structure-bioactivity relationship. (Abstract shortened by ProQuest.)</p>
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Mechanisms of biogenic formaldehyde generation in wood
… model compounds and isolated lignins. Lignin methoxyl cleavage was also observed, but was considered an unlikely source of thermochemical CH₂O. Alkaline pretreatments suppressed CH₂O generation. Regarding wood-based composite manufacture, the implications are that lignin reactions can be …