Search results for "Complement"

Abalone (Haliotis tuberculata) hemocyanin type 1 (HtH1) . Organization of the = 400 kDa subunit, and amino acid sequence of its functional units f, g…

1999

We have identified two separate hemocyanin types (HtH1 and HtH2) in the European abalone Haliotis tuberculata. HtH1/HtH2 hybrid molecules were not found. By selective dissociation of HtH2 we isolated HtH1 which, as revealed by electron microscopy and SDS/PAGE, is present as didecamers of a approximately 400 kDa subunit. Immunologically, HtH1 and HtH2 correspond to keyhole limpet hemocyanin (KLH)1 and KLH2, respectively, the two well-studied hemocyanin types of the closely related marine gastropod Megathura crenulata. On the basis of limited proteolytic cleavage, two-dimensional immunoelectrophoresis, SDS/PAGE and N-terminal sequencing, we identified eight different 40-60 kDa functional unit…

Divergent Distribution in Vascular and Avascular Mammalian Retinae Links Neuroglobin to Cellular Respiration

2005

The visual function of the vertebrate retina relies on sufficient supply with oxygen. Neuroglobin is a respiratory protein thought to play an essential role in oxygen homeostasis of neuronal cells. For further understanding of its function, we compared the distribution of neuroglobin and mitochondria in both vascular and avascular mammalian retinae. In the vascular retinae of mouse and rat, oxygen is supplied by the outer choroidal, deep retinal, and inner capillaries. We show that in this type of retina, mitochondria are concentrated in the inner segments of photoreceptor cells, the outer and the inner plexiform layers, and the ganglion cell layer. These are the same regions in which oxyge…

Metatranscriptomic Approach to Analyze the Functional Human Gut Microbiota

2011

The human gut is the natural habitat for a large and dynamic bacterial community that has a great relevance for health. Metagenomics is increasing our knowledge of gene content as well as of functional and genetic variability in this microbiome. However, little is known about the active bacteria and their function(s) in the gastrointestinal tract. We performed a metatranscriptomic study on ten healthy volunteers to elucidate the active members of the gut microbiome and their functionality under conditions of health. First, the microbial cDNAs obtained from each sample were sequenced using 454 technology. The analysis of 16S transcripts showed the phylogenetic structure of the active microbi…

Chemical analysis and antioxidant activity of the essential oils of three Piperaceae species growing in the central region of Cuba.

2013

The present study describes the phytochemical profile and antioxidant activity of the essential oils of three Piperaceae species collected in the central region of Cuba. The essential oils of Piper aduncum, P. auritum and P. umbellatum leaves, obtained by hydrodistillation, were analyzed by gas chromatography-mass spectrometry. The main components of P. aduncum oil were piperitone (34%), camphor (17.1%), camphene (10.9%), 1,8-cineol (8.7%) and viridiflorol (7.4%), whereas that of P. auritum and P. umbellatum was safrole (71.8 and 26.4%, respectively). The antioxidant properties of the essential oils were also evaluated using several assays for radical scavenging ability (DPPH test and redu…

Alberi e Sinfonie: matematica, musica e complessità della natura

2022

[no abstract]

Some models of geometries after Hilbert’s Grundlagen

2010

Sono descritti alcuni dei principali modelli di geometrie non desarguesiane e non archimedee Abstract: We investigate the contribution of Max Dehn to the development of non-Archimedean geometries and the contribution of his student Ruth Moufang to the development of non-Desarguesian geometries.

C1q is involved in human trophoblast invasion

2007

During the development of human placenta, extravillous trophoblast (EVT) departs from anchoring chorionic villi and invades the maternal decidua. Immunohistochemical analysis of decidua obtained from voluntary abortions showed that C1q was widely distributed in the decidual stroma with intense staining around invading trophoblast, while undetectable in non pregnant uterus. Based on these findings, we hypothesized that C1q may be involved in the migration of EVT. To this end, we investigated the ability of EVT to adhere to solid-phase bound C1q and to migrate using a transwell model system with inserts coated with C1q. Our results showed that EVT strongly adhered to C1q to an extent similar …

Antígona, desde el teatro clásico al Derecho Puro. Perspectivas de la enseñanza a través del método del case-study

2019

espanolEl presente trabajo tiene como objetivo tomar la teoria del “case – study” y aplicarla de forma original a la ensenanza del Derecho, a traves del analisis de la obra de teatro clasico Antigona de Sofocles. Es menester desatacar que son cada vez mas frecuentes los factores que nos demuestran que los alumnos encuentran dificultades para superar el abismo que media entre las abstracciones teoricas y las situaciones confusas que se presentan en la realidad. Para cubrir esa carencia formativa el metodo de estudio de casos es un intento de aprendizaje grupal orientado a extraer el maximo beneficio posible de las experiencias y conocimientos de los otros. Asi Antigona como obra de teatro pu…

Un delicato equilibrio tra macchine, algebra e geometria: Descartes e una possibile estensione differenziale

Laboratorio collegato al bando UMI Premio Archimede

2013

Viene descritta un'attività laboratoriale svolta nell'ambito del Progetto Lauree Scientifiche, collegata al Bando UMI sul Premio Archimede.