Search results for "Host"
showing 10 items of 1982 documents
Heptagon-Containing Nanographene Embedded into [10]Cycloparaphenylene
2023
We report the synthesis and characterization of a novel type of nanohoop, consisting of a cycloparaphenylene derivative incorporating a curved heptagon-containing π-extended polycyclic aromatic hydrocarbon (PAH) unit. We demonstrate that this new macrocycle behaves as a supramolecular receptor of curved π-systems such as fullerenes C60 and C70, with remarkably large binding constants (ca. 107 M−1), as estimated by fluorescence measurements. Nanosecond and femtosecond spectroscopic analysis show that these host-guest complexes are capable of quasi-instantaneous charge separation upon photoexcitation, due to the ultrafast charge transfer from the macrocycle to the complexed fullerene. These r…
In Vivo Observations on Tumor Invasion
1989
Tumor invasion in vivo is a very complex and dynamic process which depends upon a variety of interactions between heterogeneous tumor cell populations and the different cellular and extracellular components of the host tissue. This situation cannot be reproduced even in the most sophisticated in vitro system. On the other hand, there is at present no method available for a direct and dynamic observation of tumor invasion deep in the nontransparent living tissue, so that all evidence has to be derived from indirect observations made on the basis of static morphology. But all these limitations do not deny the potential value of in vivo investigations in following the natural course of tumor i…
Parasite Infection and Host’s Behavior
2010
Animal behavior and parasitism are more tightly linked, from an ecological and evolutionary point of view, than commonly thought. In the past 30 years, the growing field of evolutionary parasitology has tackled both proximate and ultimate answers to the following question: Why and how should the behavior of hosts exposed to the risk of a disease or that of parasitized hosts be altered? Altered behavior may simply be a symptom of disease without obvious connection with host resistance or parasite-transmission strategies. However, natural selection may have shaped behavior to avoid infection, get rid of parasites, or limit their pathogenicity. Alternatively, manipulative parasites may alter t…
The IFN-γ-Inducible GTPase, Irga6, Protects Mice against Toxoplasma gondii but Not against Plasmodium berghei and Some Other Intracellular Pathogens
2011
Clearance of infection with intracellular pathogens in mice involves interferon-regulated GTPases of the IRG protein family. Experiments with mice genetically deficient in members of this family such as Irgm1(LRG-47), Irgm3(IGTP), and Irgd(IRG-47) has revealed a critical role in microbial clearance, especially for Toxoplasma gondii. The in vivo role of another member of this family, Irga6 (IIGP, IIGP1) has been studied in less detail. We investigated the susceptibility of two independently generated mouse strains deficient in Irga6 to in vivo infection with T. gondii, Mycobacterium tuberculosis, Leishmania mexicana, L. major, Listeria monocytogenes, Anaplasma phagocytophilum and Plasmodium …
Strongyloides natricissp. n. (Strongyloididae), un nouveau nématode parasite deNatrix maura(L. 1758) (Colubridae) en Espagne
1993
Description d’une nouvelle espece de Nematode Strongyloididae, Strongyloides natricis sp. n. trouvee chez Natrix maura (L. 1758) (Colubridae), capturee a Mora de Rubielos, Teruel, Espagne. L’espece presente entre autres caracteres distinctifs une plus grande taille corporelle et des longueurs oesophagienne et caudale proportionnellement inferieures a celles de toutes les autres especes de ce genre.
Strongyloides mascomaisp. n. (Strongyloididae) un nouveau Nématode parasite deRana pereziSeoane, 1885 (Amphibia : Ranidae) de l’est de l’Espagne
1989
SUMMARY. Description and differentiation of the parasite stage of Strongyloides mascomai sp. n. (Nematoda: Strongyloididae), an cloacal parasite of Rana perezi Seoane, 1885 in the east of Iberian Peninsula (Spain). The new species is charac-terized for its large length of the oesophagus, the morphology of its stoma and the moderate spiralation of the ovaries of the female parasite.
Two tiered privacy enhanced intrusion detection system architecture
2009
The paper describes an architecture for privacy-enhanced intrusion detection systems, that separates privacy-invasive and privacy-preserving operations. This can be useful in cases where less sensitive network monitoring is outsourced to a third party and more sensitive network monitoring operations and data forensics are performed in-house or by law enforcement agencies.
SymbioGenomesDB: a database for the integration and access to knowledge on host-symbiont relationships.
2014
Symbiotic relationships occur naturally throughout the tree of life, either in a commensal, mutualistic or pathogenic manner. The genomes of multiple organisms involved in symbiosis are rapidly being sequenced and becoming available, especially those from the microbial world. Currently, there are numerous databases that offer information on specific organisms or models, but none offer a global understanding on relationships between organisms, their interactions and capabilities within their niche, as well as their role as part of a system, in this case, their role in symbiosis. We have developed the SymbioGenomesDB as a community database resource for laboratories which intend to investigat…