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  • 1
    Keywords: COMBINATION ; Germany ; TOOL ; GENE ; PROTEIN ; PROTEINS ; METABOLISM ; MOLECULES ; MECHANISM ; mechanisms ; TOLERANCE ; DISCOVERY ; MOLECULE ; WATER ; DAMAGE ; bioinformatics ; MAMMALIAN-CELLS ; STABILITY ; review ; regulation ; HEAT-SHOCK-PROTEIN ; LIFE ; development ; cryopreservation ; BACTERIA ; biotechnology ; STATE ; CHAPERONE ACTIVITY ; WELL ; MILNESIUM-TARDIGRADUM ; RICHTERSIUS-CORONIFER ; ADORYBIOTUS-CORONIFER ; Anhydrobiosis ; ARTEMIA-FRANCISCANA ; Biostabilization ; Cryobanking ; Cryoprotectant ; Cryptobiosis ; DESICCATION TOLERANCE ; FRESH-WATER SPONGE ; SHOCK/ALPHA-CRYSTALLIN PROTEIN ; STRESS-PROTEIN
    Abstract: Certain organisms found across a range of taxa, including bacteria, yeasts, plants and many invertebrates such as nematodes and tardigrades are able to survive almost complete loss of body water. The dry organisms may remain in this state. which is known as anhydrobiosis. for decades without apparent damage. When water again becomes available, they rapidly rehydrate and resume active life. Research in anhydrobiosis has focused mainly on sugar metabolism and stress proteins. Despite the discovery of various molecules which are involved in desiccation and water stress, knowledge of the regulatory network governing the stability of the cellular architecture and the metabolic machinery during dehydration is still fragmentary and not well understood. A combination of transcriptional, proteomic and metabolic approaches with bioinformatics tools can provide a better understanding of gene regulation that underlie the biological functions and physiology related to anhydrobiosis. The development of this concept will raise exciting possibilities and techniques for the preservation and stabilization of biological materials in the dry state. (c) 2009 Elsevier Inc. All rights reserved
    Type of Publication: Journal article published
    PubMed ID: 19472511
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  • 2
  • 3
    Keywords: SURVIVAL ; LUNG-CANCER ; DISEASE ; TRIAL ; MUTATIONS ; SQUAMOUS-CELL CARCINOMA ; HEAD ; pancreatic cancer ; NECK-CANCER ; GEMCITABINE ; clinical trial ; CLINICAL BENEFIT ; Advanced disease ; EGFR antibody ; H-R3 ; Nimotuzumab
    Abstract: Introduction Nimotuzumab is a humanized monoclonal antibody that binds to the EGFR. Based on phase I data, the recommended dose has been established at 200 mg weekly. This study was aimed at evaluating the safety and efficacy of nimotuzumab monotherapy in patients (pts) with locally advanced or metastatic pancreatic cancer. Methods Pts who failed first line standard chemotherapy for advanced disease and had at least one measurable lesion were eligible for the study. Nimotuzumab was given intravenously at 200 mg once weekly for 6 weeks (wks). Follow up by CT scan was performed after 8 weeks. Pts continued receiving treatment 3-weekly until disease progression or unacceptable toxicity occurred. Endpoints included tumor response (RECIST), progression-free survival (PFS), and safety. Results A total of 56 pts were enrolled for treatment (ECOG status of 1 [n=41] or 0 [n=15]), the majority (47 pts) had metastatic disease. Nearly half of the pts [n=26] received 〉= 2 regimens. Pts evaluable for response: n=36; CR: 0; PR: 0; SD: 6 pts. Median PFS for pts with SD was 19.2 weeks, for all pts 6.7 weeks (95% CI: 6.43-7.14 weeks). PFS after 1 year was 10.3% with a median overall survival of 18.1 weeks. Treatment-related adverse events were generally mild including rash grade 1 in 5 pts. After a single dose of 200 mg, the t(1/2) was calculated to 45 h. Conclusion These data confirm that nimotuzumab is safe and very well tolerated. To improve efficacy, a randomized, placebo-controlled trial with Gem has been initiated
    Type of Publication: Journal article published
    PubMed ID: 21170759
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  • 4
    Keywords: IONIZING-RADIATION ; Germany ; MODEL ; INFORMATION ; GENE ; GENES ; DNA ; TOLERANCE ; SEQUENCE ; SEQUENCES ; WATER ; IDENTIFICATION ; CHROMATIN ; HEAT-SHOCK ; STRESS ; genetics ; DAMAGE ; DATABASE ; CAENORHABDITIS-ELEGANS ; assembly ; TRANSLATION ; EXPRESSED SEQUENCE TAGS ; transcriptome ; CONTROLLED TUMOR PROTEIN ; radiation tolerance ; Genetic ; MILNESIUM-TARDIGRADUM ; RICHTERSIUS-CORONIFER ; ADORYBIOTUS-CORONIFER ; DESICCATION TOLERANCE ; Species ; CONTRIBUTE ; EST ; ACID-BINDING PROTEINS ; FREEZE TOLERANCE ; POLYPEDILUM-VANDERPLANKI ; Sequence information
    Abstract: Background: The phenomenon of desiccation tolerance, also called anhydrobiosis, involves the ability of an organism to survive the loss of almost all cellular water without sustaining irreversible damage. Although there are several physiological, morphological and ecological studies on tardigrades, only limited DNA sequence information is available. Therefore, we explored the transcriptome in the active and anhydrobiotic state of the tardigrade Milnesium tardigradum which has extraordinary tolerance to desiccation and freezing. In this study, we present the first overview of the transcriptome of M. tardigradum and its response to desiccation and discuss potential parallels to stress responses in other organisms. Results: We sequenced a total of 9984 expressed sequence tags (ESTs) from two cDNA libraries from the eutardigrade M. tardigradum in its active and inactive, anhydrobiotic (tun) stage. Assembly of these ESTs resulted in 3283 putative unique transcripts, whereof similar to 50% showed significant sequence similarity to known genes. The resulting unigenes were functionally annotated using the Gene Ontology (GO) vocabulary. A GO term enrichment analysis revealed several GOs that were significantly underrepresented in the inactive stage. Furthermore we compared the putative unigenes of M. tardigradum with ESTs from two other eutardigrade species that are available from public sequence databases, namely Richtersius coronifer and Hypsibius dujardini. The processed sequences of the three tardigrade species revealed similar functional content and the M. tardigradum dataset contained additional sequences from tardigrades not present in the other two. Conclusions: This study describes novel sequence data from the tardigrade M. tardigradum, which significantly contributes to the available tardigrade sequence data and will help to establish this extraordinary tardigrade as a model for studying anhydrobiosis. Functional comparison of active and anhydrobiotic tardigrades revealed a differential distribution of Gene Ontology terms associated with chromatin structure and the translation machinery, which are underrepresented in the inactive animals. These findings imply a widespread metabolic response of the animals on dehydration. The collective tardigrade transcriptome data will serve as a reference for further studies and support the identification and characterization of genes involved in the anhydrobiotic response
    Type of Publication: Journal article published
    PubMed ID: 20226016
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    Publication Date: 2016-06-02
    Description: Hemodynamic monitoring and adequate volume-therapy, as well as the treatment with positive inotropic drugs and vasopressors are the basic principles of the postoperative intensive care treatment of patient after cardiothoracic surgery. The goal of these S3 guidelines is to evaluate the recommendations in regard to evidence based medicine and to define therapy goals for monitoring and therapy. In context with the clinical situation the evaluation of the different hemodynamic parameters allows the development of a therapeutic concept and the definition of goal criteria to evaluate the effect of treatment. Up to now there are only guidelines for subareas of postoperative treatment of cardiothoracic surgical patients, like the use of a pulmonary artery catheter or the transesophageal echocardiography. The German Society for Thoracic and Cardiovascular Surgery (Deutsche Gesellschaft für Thorax-, Herz- und Gefäßchirurgie, DGTHG) and the German Society for Anaesthesiology and Intensive Care Medicine (Deutsche Gesellschaft für Anästhesiologie und lntensivmedizin, DGAI) made an approach to ensure and improve the quality of the postoperative intensive care medicine after cardiothoracic surgery by the development of S3 consensus-based treatment guidelines. Goal of this guideline is to assess the available monitoring methods with regard to indication, procedures, predication, limits, contraindications and risks for use. The differentiated therapy of volume-replacement, positive inotropic support and vasoactive drugs, the therapy with vasodilatators, inodilatators and calcium sensitizers and the use of intra-aortic balloon pumps will also be addressed. The guideline has been developed following the recommendations for the development of guidelines by the Association of the Scientific Medical Societies in Germany (AWMF). The presented key messages of the guidelines were approved after two consensus meetings under the moderation of the Association of the Scientific Medical Societies in Germany (AWMF).
    Description: Das hämodynamische Monitoring und die Differentialtherapie mittels adäquater Volumensubstitution sowie positiv inotroper und vasoaktiver Substanzen sind die Grundpfeiler der postoperativen intensivmedizinischen Behandlung von kardiochirurgischen Patienten. Ziel der S3-Leitlinie war es, die Empfehlungen zum Monitoring und zur Therapie Evidenz-basiert zu prüfen sowie Zielkriterien für das Monitoring und die Therapie festzulegen. Die Bewertung erhobener Messparameter im Zusammenhang mit der klinischen Gesamtsituation des Patienten erlaubt die Entwicklung eines weiterführenden Therapiekonzeptes und die Festlegung von Zielkriterien zur Kontrolle des Behandlungserfolges. Bislang existieren Leitlinien und Empfehlungen lediglich für Teilbereiche der kardiochirurgischen Intensivmedizin. So bestehen Leitlinien für den Einsatz des Pulmonalarterienkatheters und der transösophagealen Echokardiographie (TEE) für diesen speziellen Bereich der postoperativen Patientenversorgung.Die Deutsche Gesellschaft für Thorax-, Herz- und Gefäßchirurgie (DGTHG) und die Deutsche Gesellschaft für Anästhesiologie und Intensivmedizin (DGAI) haben sich daher zum Ziel gesetzt einen nationalen Ansatz zur Sicherung und Verbesserung der Qualität der postoperativen kardiochirurgischen Intensivmedizin mit der vorliegenden Evidenz-basierten S3-Konsensusleitlinie zu schaffen.Ziel dieser Leitlinie ist eine Bewertung der verfügbaren Monitoring-Verfahren im Hinblick auf Indikationen, Vorgehen, Aussagen, Limitationen, Kontraindikationen und Risiken. Weiterhin die Differentialtherapie mit Volumenersatzlösungen versus positiv inotropen und vasoaktiven Substanzen, die differenzierte Katecholamintherapie einschließlich der Inodilatoren und Kalzium-Sensitizer sowie die Einsatzkriterien der intra-aortalen Ballonpumpe.Die Leitlinie ist in einem standardisierten Prozess nach Vorgaben der Arbeitsgemeinschaft der Wissenschaftlichen Medizinischen Fachgesellschaften (AWMF) erstellt worden. Die Verabschiedung der Kernaussagen der Leitlinie erfolgte in zwei Konsensusverfahren unter Moderation der AWMF.
    Keywords: intensive care medicine ; cardiothoracic surgery ; monitoring ; volume therapy ; positive inotropic and vasoactive drugs ; Intensivmedizin ; Kardiochirurgie ; Monitoring ; Volumentherapie ; positiv inotrope und vasoaktive Substanzen ; ddc: 610
    Language: English
    Type: article
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  • 7
    ISSN: 0273-1177
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 0019-1035
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 70 (1999), S. 3435-3438 
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A new type of carbon source using the electron evaporator principle to generate a molecular beam is presented. The electrons are extracted from a hot tungsten filament which is biased negatively up to 1500 V versus the carbon target (ground potential), made from ultrapure pyrolytic graphite. The emission current at a fixed high voltage is controlled via a feedback loop and used to tune the carbon flux. In this way, a flux reproducibility of ±5% is achieved over a working period of 5 months. Flux rates up to 6.1×1011 cm−2 s−1 at a source–sample distance of 250 mm have been achieved. The source design is very compact so it was possible to build it onto a flange with a inner diameter of 40 mm (CF40 flange) which saves mounting space. Using this source it was possible to prepare two dimensional hole gases with hole mobilities up to 160 000 cm2 V−1 s−1 at 1 K. No memory effect was observed. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The degradation of selectivity doped Al0.35Ga0.65As/GaAs heterostructures caused by rapid thermal annealing (RTA) was studied. The samples were annealed for 30 s at temperatures between 600 °C and 850 °C. Thereafter, the samples were characterized by Hall measurements at room temperature. Conventional heterostructures with a random alloy Al0.35Ga0.65As spacer and donor layer show a strong degradation for annealing temperatures of 650 °C or higher. For heterostructures employing a stoichiometric equivalent short period superlattice (SPS) in spacer and donor region only a slight degradation was found for annealing temperatures up to 850 °C. As reason for the increased thermal stability, the suppression of As loss during the annealing by the SPS was identified. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
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