12,983 research outputs found
Exploration archéologique du Colorado oriental
No full textRenaud Etienne-B., D Ph. Exploration archéologique du Colorado oriental. In: Bulletin de la Société préhistorique de France, tome 28, n°6, 1931. pp. 323-324
Prediction of rye dough behaviour and bread quality using response surface methodology
No full textpeer-reviewedBread making is a hydro-thermal process; therefore, knowing the behaviour of the
main constituents of the flour at different temperatures allows control of the quality of
the end-product. Mixing and thermal characteristics were studied using the Mixolab
system and response surface methodology was used to investigate the influence of particle
size distribution of the flour, pH and the addition of hemicellulase enzyme on the
thermo-mechanical behaviour of the whole rye flour and on bread quality. A central
composite face-centered design, with two levels of fineness modulus (1.78 and 1.26),
two levels of pH (6.5 and 3.8) and three levels of added enzyme (0, 50 and 100 mg/kg
of flour), was used. The results indicated that thermo-mechanical variables – water
absorption, development time, dough stability, protein weakening, starch gelatinization,
starch gelling and cooling setback – as well as bread quality are influenced by the
three factors investigated.
Significant correlations were found between water absorption and pH, enzyme level,
fineness modulus and their interactions. Dough stability was significantly influenced
by all the independent variables, as well as by the interaction between pH and fineness
modulus. Starch gelling and cooling setback were influenced by the interaction between
pH and enzyme level. Concerning bread quality, both porosity and specific volume were
affected by enzyme level and pH, as well as by the interaction between fineness modulus
and enzyme level
Hauser (H.) et Renaud et (A.). — Les débuts de l'âge moderne (Coll. Peuples et civilisations, histoire générale publiée sous la direction de L. Halphen et Ph. Sagnac). 1929
No full textCoornaert E. Hauser (H.) et Renaud et (A.). — Les débuts de l'âge moderne (Coll. Peuples et civilisations, histoire générale publiée sous la direction de L. Halphen et Ph. Sagnac). 1929. In: Revue du Nord, tome 16, n°61, février 1930. pp. 59-60
Hauser (H.) et Renaud et (A.). — Les débuts de l'âge moderne (Coll. Peuples et civilisations, histoire générale publiée sous la direction de L. Halphen et Ph. Sagnac). 1929
No full textCoornaert E. Hauser (H.) et Renaud et (A.). — Les débuts de l'âge moderne (Coll. Peuples et civilisations, histoire générale publiée sous la direction de L. Halphen et Ph. Sagnac). 1929. In: Revue du Nord, tome 16, n°61, février 1930. pp. 59-60
An intracellular pH gradient in the anammox bacterium Kuenenia stuttgartiensis as evaluated by (31)P NMR
No full textThe cytoplasm of anaerobic ammonium oxidizing (anammox) bacteria consists of three compartments separated by membranes. It has been suggested that a proton motive force may be generated over the membrane of the innermost compartment, the “anammoxosome”. 31P nuclear magnetic resonance (NMR) spectroscopy was employed to investigate intracellular pH differences in the anammox bacterium Kuenenia stuttgartiensis. With in vivo NMR, spectra were recorded of active, highly concentrated suspensions of K. stuttgartiensis in a wide-bore NMR tube. At different external pH values, two stable and distinct phosphate peaks were apparent in the recorded spectra. These peaks were equivalent with pH values of 7.3 and 6.3 and suggested the presence of a proton motive force over an intracytoplasmic membrane in K.stuttgartiensis. This study provides for the second time—after discovery of acidocalcisome-like compartments in Agrobacterium tumefaciens—evidence for an intracytoplasmic pH gradient in a chemotrophic prokaryotic cell.BiotechnologyApplied Science
Pacific-wide pH snapshots reveal that high coral cover correlates with low, but variable pH
No full text© The Author(s), 2021. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Manzello, D. P., Enochs, I. C., Carlton, R., Bruckner, A., Kolodziej, G., Dempsey, A., & Renaud, P. Pacific-wide pH snapshots reveal that high coral cover correlates with low, but variable pH. Bulletin of Marine Science, 97(1), (2021): 239-256, https://doi.org/10.5343/bms.2019.0100.Ocean acidification (OA) is impairing the construction of coral reefs while simultaneously accelerating their breakdown. The metabolism of different reef organism assemblages alters seawater pH in different ways, possibly buffering or exacerbating OA impacts. In spite of this, field data relating benthic community structure and seawater pH are sparse. We collected pH time-series data snapshots at 10 m depth from 28 different reefs (n = 13 lagoon, n = 15 fore reef) across 22 Pacific islands, spanning 31° latitude and 90° longitude. Coincident with all deployments, we measured percent cover of the benthic community. On fore reefs, high coral cover (CC) negatively correlated with mean and minimum pH, but positively correlated with pH variability. Conversely, pH minima were positively correlated to coverage of coralline and turf algae. Benthic cover did not correlate with pH in lagoonal reefs. From 0% to 100% CC, mean pH and aragonite saturation state (Ωarag) declined −0.081 and −0.51, respectively, while declines in minimum values were greater (Δmin pH = −0.164, Δmin Ωarag = −0.96). Based upon previously published relationships, the mean pH decline from 0% to 100% CC would depress coral calcification 7.7%–18.0% and increase biologically-mediated dissolution 13.5%–27.9%, with pH minima depressing dark coral calcification 14.4%–35.2% and increasing biologically-mediated dissolution 31.0%–62.2%. This spatially expansive dataset provides evidence that coral reefs with the highest coral cover may experience the lowest and most extreme pH values with OA.We thank the Khaled bin Sultan Living Ocean’s Foundation and the crew of the M/Y Golden Shadow. B Beck, J Monteiro, and many others assisted with field work. The Khaled bin Sultan Living Ocean’s Foundation supported the Global Reef Expedition. NOAA’s Coral Reef Conservation Program and Ocean Acidification Program support DP Manzello, IC Enochs, and G Kolodziej
Concept and development of an autonomous wearable micro-fluidic platform for real time pH sweat analysis
No full textIn this work the development of an autonomous, robust and wearable micro-fluidic platform capable of performing on-line analysis of pH in sweat is discussed. Through the means of an optical detection system based on a surface mount light emitting diode (SMD LED) and a light photo sensor as a detector, a wearable system was achieved in which real-time monitoring of sweat pH was performed during 55 minutes of cycling activity. We have shown how through systems engineering, integrating miniaturised electrical components, and by improving the micro-fluidic chip characteristics, the wearability, reliability and performance of the micro-fluidic platform was significantly improved
Exploring the effect of the pH on the corrosion of multilayer nickel-chromium coatings
No full textThe impact of the pH on the corrosion of microporous nickel-chromium coatings has been explored at localised scale by Scanning Electrochemical Microscopy and validated by potentiodynamic polarisation measurements. Results not only reveal the correlation between both techniques but also enables to identify the different corrosion rate after increasing the electrolyte aggressiveness varying the pH. However, independently of the pH, a similar corrosion mechanism was determined: the cross-section micrographs (by Field Emission-Scanning Electron Microscope) have revealed an isotropic growth of the actives sites at early-stage corrosion as well as the attack of different nickel layers during the corrosion propagation.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Team Yaiza Gonzalez Garci
Il dibattito italiano su principi e clausole generale e l'ideale della certezza del diritto
No full textThis essay provides a critical assessment of the current Italian debate on general clauses and principles as set forth in a recent book edited by Giovanni D’Amico. The Author focuses on the role that legal certainty has played so far in this discussion and suggests that its impact on real life decisions and the functioning of the legal system has been greatly undervalued. The essay’s central argument attempts to demonstrate that, in the interpretation of general clauses and their translation into specific rules, the objective of legal certainty should be pursued and can ultimately be achieved
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