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  • 1
    Electronic Resource
    Electronic Resource
    Continuous drying of a solid wetted with ternary mixtures (1997)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 43 (1997), S. 681-692 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The influence on drying selectivity of the continuous-contact mode between a solid wetted with ternary mixtures and a gas stream was theoretically studied. The liquid mixtures, ethanol-isopropanol-water and water-ethanol-acetone, were used. A mathematical model describing a gas-phase-controlled process was developed, and the influence of the process variables was studied by simulations. In addition to the inlet composition of the moisture and temperature of the solid, gas composition has the most important effect on selectivity. Small changes of gas composition, either imposed or spontaneous, may modify completely the process trajectory. The extent of these effects depends on the ratio between the flow rates of inlet gas and liquid contained in the solid. Because of their effects on the evolution of temperature and composition, the operating pressure and energy sources other than convection are also useful in controlling the selectivity. Since all these variables determine the composition of the remaining liquid and thereby product quality, their influence should be predictable. The model may be a valuable tool for exploring the process, provided that drying is gas-phase-controlled.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690430314
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  • 2
    Electronic Resource
    Electronic Resource
    Temperature polarization in mass transport through hydrophobic porous membranes (1996)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 42 (1996), S. 1844-1852 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Membrane distillation is a membrane process in which two liquid phases at different temperatures are separated by a microporous hydrophobic membrane. The membrane plays the role of physical support for the vapor-liquid interface. Pure water transport through PTFE and PVDF flat membranes was studied, as well as the dependence of the phenomena on average temperature and recirculation rate at membrane sides. The influence of these operating conditions on mass transfer is also discussed, taking into account mass and heat transfer within the membrane and adjoining liquid phases. The concept of temperature polarization introduced into the transport equations shows its importance in experimental results.
    Additional Material: 15 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690420706
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  • 3
    Electronic Resource
    Electronic Resource
    Direct solution of the isothermal gibbs-duhem equation by an iterative method for binary systems (1977)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 23 (1977), S. 393-395 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690230329
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  • 4
    Electronic Resource
    Electronic Resource
    Hazard evaluation of polymerizable compounds (1995)
    New York, NY [u.a.] : Wiley-Blackwell
    Process Safety Progress 14 (1995), S. 79-86 
    Details
    ISSN: 1066-8527
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Reactive monomers are a special class of materials used widely in the chemical industry in the production of polymers. Many of these materials are thermally unstable and may polymerize during handling and storage with a release of significant amounts of energy. If this energy is not controlled properly, it can lead to a runaway reaction. Compounding the concern for the stability of monomers is the fact that these materials are typically transported and stored in large volume. The undesired initiation of the polymerization reaction may be caused by a number of factors, including contamination, exposure to extreme environmental conditions, or inhibitor loss. For example, an “unintended” polymerization can result from a seemingly benign procedure such as spill control with common absorbents. These and other factors mean that the reactive chemicals evaluation of monomers presents special problems and concerns which require more detailed experimental design for reliable hazard testing. This paper discusses the practical aspects of reactive chemicals testing strategies for monomers and rules-of-thumb for monomer inhibition, compatibility, spill control, and so-called quenching (also called short-stopping) agents. The techniques discussed range from simple “age and observe” type tests to more sophisticated heat flux calorimetry evaluations. We also discuss the more routine application of Differential Scanning Calorimetry and Accelerating Rate Calorimetry to monomers. Vent sizing applications with the VSP device are also presented with emphasis on total containment during a runaway.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prs.680140202
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  • 5
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    Angiostatin's partners (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-05-08
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Martinez-Zaguilan, R -- New York, N.Y. -- Science. 1999 Apr 16;284(5413):433-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10232985" target="_blank"〉PubMed〈/a〉
    Keywords: Angiostatins ; Cell Membrane/*enzymology/metabolism ; Endothelium, Vascular/cytology/*enzymology/metabolism ; Humans ; Hydrogen-Ion Concentration ; Neovascularization, Pathologic ; Peptide Fragments/*metabolism ; Plasminogen/*metabolism ; Proton Pumps ; Proton-Translocating ATPases/*metabolism ; *Vacuolar Proton-Translocating ATPases
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 6
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    Interaction of a Golgi-associated kinesin-like protein with Rab6 (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-02-07
    Description: Rab guanosine triphosphatases regulate vesicular transport and membrane traffic within eukaryotic cells. Here, a kinesin-like protein that interacts with guanosine triphosphate (GTP)-bound forms of Rab6 was identified. This protein, termed Rabkinesin-6, was localized to the Golgi apparatus and shown to play a role in the dynamics of this organelle. The carboxyl-terminal domain of Rabkinesin-6, which contains the Rab6-interacting domain, inhibited the effects of Rab6-GTP on intracellular transport. Thus, a molecular motor is a potential effector of a Rab protein, and coordinated action between members of these two families of proteins could control membrane dynamics and directional vesicular traffic.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Echard, A -- Jollivet, F -- Martinez, O -- Lacapere, J J -- Rousselet, A -- Janoueix-Lerosey, I -- Goud, B -- New York, N.Y. -- Science. 1998 Jan 23;279(5350):580-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Unite Mixte de Recherche CNRS 144 et 168, Institut Curie, 26 rue d'Ulm, 75248 Paris Cedex 05, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9438855" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Triphosphatases/metabolism ; Alkaline Phosphatase/metabolism ; Amino Acid Sequence ; Biological Transport ; Carrier Proteins/*metabolism ; Endoplasmic Reticulum/metabolism ; Golgi Apparatus/chemistry/*metabolism/ultrastructure ; Guanosine Triphosphate/metabolism ; HeLa Cells ; Humans ; Kinesin/analysis/chemistry/genetics/*metabolism ; Microtubules/metabolism/ultrastructure ; Molecular Sequence Data ; Molecular Weight ; *rab GTP-Binding Proteins ; ras Proteins/*metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 7
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    Size variation in Middle Pleistocene humans (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-08-22
    Description: It has been suggested that European Middle Pleistocene humans, Neandertals, and prehistoric modern humans had a greater sexual dimorphism than modern humans. Analysis of body size variation and cranial capacity variation in the large sample from the Sima de los Huesos site in Spain showed instead that the sexual dimorphism is comparable in Middle Pleistocene and modern populations.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Arsuaga, J L -- Carretero, J M -- Lorenzo, C -- Gracia, A -- Martinez, I -- Bermudez de Castro, J M -- Carbonell, E -- New York, N.Y. -- Science. 1997 Aug 22;277(5329):1086-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Departamento de Paleontologia, Instituto de Geologia Economica, Facultad de Ciencias Geologicas, Universidad Complutense de Madrid, Ciudad Universitaria 28040 Madrid, Spain.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9262474" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Body Constitution ; Female ; *Fossils ; Hominidae/*anatomy & histology ; Humans ; Male ; *Sex Characteristics ; Skull/*anatomy & histology ; Spain
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 8
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    A hominid from the lower Pleistocene of Atapuerca, Spain: possible ancestor to Neandertals and modern humans (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-05-30
    Description: Human fossil remains recovered from the TD6 level (Aurora stratum) of the lower Pleistocene cave site of Gran Dolina, Sierra de Atapuerca, Spain, exhibit a unique combination of cranial, mandibular, and dental traits and are suggested as a new species of Homo-H. antecessor sp. nov. The fully modern midfacial morphology of the fossils antedates other evidence of this feature by about 650, 000 years. The midfacial and subnasal morphology of modern humans may be a retention of a juvenile pattern that was not yet present in H. ergaster. Homo antecessor may represent the last common ancestor for Neandertals and modern humans.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bermudez de Castro, J M -- Arsuaga, J L -- Carbonell, E -- Rosas, A -- Martinez, I -- Mosquera, M -- New York, N.Y. -- Science. 1997 May 30;276(5317):1392-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Museo Nacional de Ciencias Naturales, Consejo Superior de Investigaciones Cientificas (CSIC), Departamento de Paleobiologia, J. Gutierrez Abascal 2, 28006 Madrid, Spain.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9162001" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Animals ; Child ; Dentition ; Facial Bones ; *Fossils ; *Hominidae/classification ; Humans ; Mandible ; Skull ; Spain
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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