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.
Results
Showing 1 to 20 of 75 for “"C14"”.
-
In vitro metabolism of uniformly labeled glucose-C14 by bovine rumen microorganisms
A procedure was developed for the quantitative separation of major fermentation products of uniformly labeled glucose-C¹⁴ produced by bovine rumen microorganisms in vitro. After 45 min, the fermentation mixture was fractionated into (a) one control subsample, and duplicate fractions of (b) solid …
-
Fermentation of uniformly labeled C14 glucose in vitro by micro-organisms of the bovine rumen
The present report describes a procedure developed for tracing C¹⁴ labeled glucose in rumen material in vitro. Twenty-five ml. samples of rumen fluid were incubated with uniformly labeled glucose for 1 1/2 hours in a closed system. The distribution of activity in both unfermented control samples …
-
The incorporation of glycine-2-C14 into urinary uric acid and serum bilirubin in normal and porphyric subjects
The porphyrias are a group of disorders characterized by the excessive excretion of haem precursors in urine and stool. in the past two decades, isotopic studies led to impressive progress in our understanding of both normal and disordered porphyrin metabolism but despite these advanaces, many …
-
Untersuchungen zur Natur der Laves-Phasen in Systemen der Übergangsmetalle
… Zusammensetzung AB2, die in den Strukturtypen C14 (MgZn2), C15 (MgCu2), C36 (MgNi2) oder deren Abkömmlingen kristallisieren. Diese sind Polytypen mit einem gemeinsamen grundlegenden Strukturmuster. Insgesamt sind über 1400 binäre und ternäre Laves-Phasen bekannt. Sie stellen damit die größte …
-
Multi-component ab2 metal hydride alloys for nickel metal hydride battery applications
… its multi-phase nature, which includes the main C14/C15 Laves phases and the secondary non-Laves phases.</p> <p>In order to optimize the gaseous phase and electrochemical advantages of both the C14 and C15 Laves phases, a study was established to recognize the factors that affect the C14/C15 …
-
Phosphate Tethers in Synthesis: The Total Synthesis of Dolabelide C.
… tether methodologies. In the synthesis of the C1-C14 subunit of dolabelide C the bicyclic phosphate tether mediates a selective cross metathesis with the terminal exocyclic olefin, differentiates the endocyclic and exocyclic olefins for selective hydrogenation, and serves as a leaving grouping for …
-
Kinetic studies of the spasmogenic effects of serotonin and isolates from Byrsonima crassifolia leaves on rat fundus
… equivocal effects. Compound 5, C6, C7, C9, C14, C15, quercetin and gallic acid were active. Potencies were: C5 > C6 > C7 = quercetin > C9 > gallic acid. Efficacy (IA) was: C15 <strong>≥</strong> C14 > gallic acid > C9 > C5 > C7 > quercetin > C6. Compound 9 and its aglycone quercetin were …
-
Solid-state NMR investigations of the bacteriorhodopsin photocycle
… the Schiff base linkage and the neighboring C15-C14 bond. Changes of the dihedral about the C15-C14 were characterized during the photocycle, although the timing of the changes precludes their direct involvement in the accessibility switch. Putative protein conformation changes at the X-Pro …
-
Microstructure and mechanical behavior of metastable beta type titanium alloys
… Ti-35Zr-5Fe-xMn and Ti-xZr-7Fe-ySn alloys show C14 type Laves and β phases. It is quite interesting to investigate the deformation and strength characteristics of hexagonal close-packed C14 and face-centered cubic C15 type Laves phases in the soft β matrix. Therefore, the deformation and …
-
Survey of Ocular Trauma at Groote Schuur Hospital in Cape Town, South Africa
… cohort study of all ocular trauma cases seen at C14 Trauma Unit of Groote Schuur Hospital over a 6-month period. Results. There was a total of 1301 trauma cases that presented to C14 and a total of 47 ocular trauma cases, representing 3.6% of total trauma cases. Assault was the most common manner …
-
Molybdenum alkylidene complexes : syntheses and applications to olefin metathesis reactions
… Imido Tetrachlorides. Several new Mo(NR)C14(THF) species (R = C6F5, 3,5-(CF3)2C6H3, Ad, CPh3, and 2,6-i- Pr2C6H3) were prepared via the treatment of MoC14(THF)2 with azides, and then alkylated with neopentyl reagents. Addition of Mo(NR)C14(THF) complexes in toluene to a cold solution of …
-
Determinación de la capacidad resistente de la madera estructural de gran escuadría y su aplicación en estructuras existentes de madera de conífera
… clases resistentes asignadas varían entre una C14 (por resistencia), una C18 (por rigidez) y una C30 (por densidad). Por otro lado se ha aplicado la técnica de ultrasonidos definiendo una clase de velocidad superior a 4.100 m/s a la que se puede asignar una clase resistente C18 (por rigidez) …
-
Synthesis And In-Situ Charactorization Of Energy Storage Material
… and two AB2 alloy with a predominating C14 and a C14/C15 mixed crystal structures were reported. During the hydrogenation of the AB5 alloy, the a/c ratio in the α phase decreases, stabilizes, and then decreases again while that in the β phase decreases and then stabilizes, and the trends …
-
A novel, versatile D-BCD steroid construction strategy, illustrated by the total syntheses of estrone and desogestrel
… the correct stereochemistry at C8, C13 and C14 in a single-pot operation. The racemic total synthesis of desogestrel includes a successful domino anionic cyclisation leading to the formation of the steroid C and B rings in a single operation with complete stereocontrol at C9. The ?-keto …
-
Langmuir Monolayers of Minimal-linker Dimeric Surfactants
… monolayer similar to simple fatty acids. The C14-0-C14 homolog also shows monolayer properties similar to a common phospholipid, with a defined phase transition in the classic surface pressure-area isotherms. Further, intermolecular dispersion forces play a major role in the interpretation of …
-
Avaliação paramétrica do processo de solidificação de nanofluidos em geometria esférica
… analisados nanofluidos a base de água e parafina C14 com nanopartículas de oxido de alumínio (Al2O3), óxido de cobre (CuO), nanotubos de carbono e grafeno, e para cada uma destas combinações foram geradas curvas de resfriamento e posição da interface sólido-líquido em função do tempo, assim como …
-
Iron-Cemented Drift in Logan County, North Dakota
… Iowan in age. If this is proven to be true, by C14 datings now in process, the iron-cemented drift is pre-Wisconsin in age, the first such deposit reported from this part of North Dakota. </p><p>A possible sequence of events is offered to explain the entire Pleistocene history of the outcrop …
-
Upscaling effect in the preparation of metal hydride materials
… the alloy contained no impurities with a single C14 Laves phase and had a maximum storage capacity of 1.8 wt.% H2 at 20C . The base alloy additionally doped with Lanthanum (Ti0.85Zr0.15Cr0.2Mn1.22Ni0.22V0.3Fe0.06La0.02) was prepared by induction melting with an alumo-silica crucible and graphite …
-
New family of unsaturated polyamides from novel long-chain biomass-derived diacids
… of a variety of saturated and unsaturated C14 to C18 fatty acid methyl esters (FAMEs), fatty diacid dimethyl esters (FDADEs), ω-hydroxyl fatty methyl esters (ω-OH FAMEs) and ω-1 hydroxyl fatty methyl esters (ω-1 OH FAMEs). We aim at extraction of FDADEs to use as the precursor for polyamide …
Page 1 of 4