Texture, twinning and metastable "tetragonal" phase in ultrathin films of HfO₂ on a Si substrate

Thin HfO<sub>2</sub> films grown on the lightly oxidised surface of (100) Si wafers have been examined using dark-field transmission electron microscopy and selected area electron diffraction in plan view. The polycrystalline film has a grain size of the order of 100 nm and many of the grains show evidence of twinning on (110) and (001) planes. Diffraction studies showed that the film had a strong [110] out-of-plane texture, and that a tiny volume fraction of a metastable (possibly tetragonal) phase was retained. The reasons for the texture, twinning and the retention of the metastable phase are discussed

Green cosmetics via bio-oil

The refining of crude vegetable oil results in an unused sidestream, the oil deodorizer distillate (ODD). Thisdistillate contains valuable ‘minors’, like squalene, tocopherols and sterols, which have applications in thecosmetic, pharmaceutical and nutrition industry. Therefore, their successful separation from this sidestream increases the viability of a refinery. The separation is achieved by supercritical esterification and supercritical CO2 extraction. The objective of this study is to simulate the process with Aspen® and model the kinetics with AVS®. Different ODD are investigated with HT soybean giving the highest yield. Additionally, an economic analysis is performed to estimate the process profitability

Control biológico de la cochinilla Phenacoccus manihoti en África (Insecta)

En la presente comunicación se relatan la lucha en África, contra una especie de cochinilla que invadió las cosechas, en 1972 y las formas descubiertas para su eliminación.Academia Nacional de Agronomía y Veterinari

Control biológico de la cochinilla Phenacoccus manihoti en África (Insecta)

En la presente comunicación se relatan la lucha en África, contra una especie de cochinilla que invadió las cosechas, en 1972 y las formas descubiertas para su eliminación.Academia Nacional de Agronomía y Veterinari

On the localization of the cleavage site in human alpha‐2‐antiplasmin, involved in the generation of the non‐plasminogen binding form

Background: Alpha‐2‐antiplasmin (α2AP) is the main natural inhibitor of plasmin. The C‐terminus of α2AP is crucial for the initial interaction with plasmin(ogen) and the rapid inhibitory mechanism. Approximately 35% of circulating α2AP has lost its C‐terminus (non‐plasminogen binding α2AP/NPB‐α2AP) and thereby its rapid inhibitory capacity. The C‐terminal cleavage site of α2AP is still unknown. A commercially available monoclonal antibody against α2AP (TC 3AP) detects intact but not NPB‐α2AP, suggesting that the cleavage site is located N‐terminally from the epitope of TC 3AP. Objectives: To determine the epitope of TC 3AP and then to localize the C‐terminal cleavage site of α2AP. Methods: For epitope mapping of TC 3AP, commercially available plasma purified α2AP was enzymatically digested with Asp‐N, Glu‐C, or Lys‐N. The resulting peptides were immunoprecipitated using TC 3AP‐loaded Dynabeads® Protein G. Bound peptides were eluted and analyzed by liquid chromatography‐tandem mass spectometry (LC‐MS/MS). To localize the C‐terminal cleavage site precisely, α2AP (intact and NPB) was purified from plasma and analyzed by LC‐MS/MS after enzymatic digestion with Arg‐C. Results: We localized the epitope of TC 3AP between amino acid residues Asp428 and Gly439. LC‐MS/MS data from plasma purified α2AP showed that NPB‐α2AP results from cleavage at Gln421‐Asp422 as preferred site, but also after Leu417, Glu419, Gln420, or Asp422. Conclusions: The C‐terminal cleavage site of human α2AP is located N‐terminally from the TC 3AP epitope. Because C‐terminal cleavage of α2AP can occur after multiple residues, different proteases may be responsible for the generation of NPB‐α2AP

Alice au pays des merveilles. Première conférence internationale sur les filles et les jeunes filles. Transitions et dilemmes

Eh bien ! Tu es quoi toi, dit le Pigeon ? Je vois bien que tu essaies de me raconter des histoires ! Je. Je suis une petite fille, dit Alice, pas très sûre d'elle car tous les changements qu'elle avait subis ce jour-là lui revenaient à l'esprit. En voilà une bonne, vraiment ! dit le Pigeon d'un ton plus que dédaigneux. Les Aventures d'Alice au Pays des merveilles. En juin 1992 s'est tenu à Amsterdam, dans les deux universités, le premier colloque international sur les jeunes filles..