Search results for "iNOS"

Rhizobium leguminosarum imobilizācija uz organiskiem un neorganiskiem substrātiem

2015

Rhizobium leguminosarum ir slāpekli fiksējošas baktērijas, kas spēj veidot gumiņus uz tauriņziežu saknēm. Ar imobilizētu rizobiju preparātiem iespējams inokulēt baktērijas augsnē un uzlabot tauriņziežu augu produktivitāti. Izmantojot rizobiju inokulantus, iespējams aizvietot slāpekļa minerālmēslojumu. Pētīta substrāta un temperatūras ietekme uz imobilizētu R. leguminosarum dzīvotspēju, ilgstoši glabājot. Apskatīti 5 dažādi substrāti, baktēriju suspensija sterilā ūdenī un 4 dažādas glabāšanas temperatūras. Konstatēts, ka R. leguminosarum dzīvotspēju ietekmē gan substrāts, uz kura tās imobilizētas, gan glabāšanas temperatūra. Ilgstošai baktēriju dzīvotspējas saglabāšanai ieteicams kā substrāt…

Recensione di CAU A., 2019. La rivoluzione piumata. I nuovi dinosauri e l’origine degli uccelli. Volume primo, Pubblicazione indipendente, 160 pp.,13…

2021

Effectiveness of different disinfection techniques of the root canal in the elimination of a multi-species biofilm.

2019

Background The purpose of the study was to evaluate the effectiveness of different root canal disinfection techniques in the elimination of a multi-species biofilm from inside the root canal. Material and methods Fifty mandibular first premolars were used in the present study, standardized to 11mm of root length, and instrumented with a reciprocation system Reciproc, (VDW GmbH, Munich, Germany) to a #50. Longitudinally sectioned halves of the roots were obtained and washed with NaOCl 4%, EDTA 17% and 5% sodium thiosulfate, and sterilized by autoclaving for 15 minutes at 121°C. A multi-species biofilm broth was developed with three strains of bacteria under laboratory conditions: Enterococcu…

Bradyrhizobium sp. nodulating the Mediterranean shrub Spanish broom (Spartium junceum L.)

2002

Aims: The molecular diversity of 25 strains of rhizobia, isolated in Sicily from root nodules of the Mediterranean shrubby legume Spanish broom (Spartium junceum L.), is presented in relation to the known rhizobial reference strains. Methods and Results: Our approach to the study of the S. junceum rhizobial diversity combined the information given by the 16S and the intergenic spacer (IGS) 16S–23S rDNA polymorphic region by obtaining them in a single polymerase chain reaction (PCR) step. The PCR fragment size of the S. junceum isolates was 2400–2500 bp and that of the reference strains varied from 2400 in Bradyrhizobium strains to 2800 in Sinorhizobium strains. Inter- and intrageneric lengt…

The X-ray activity-rotation relation of T Tauri stars in Taurus-Auriga

2007

The Taurus-Auriga star-forming complex hosts the only population of T Tauri stars in which an anticorrelation of X-ray activity and rotation period has been observed. We have used XMM-Newton's European Photon Imaging Cameras to perform the most sensitive survey to date of X-ray emission (0.3-10 keV) from young stars in Taurus-Auriga and investigate the dependences of X-ray activity measures -- X-ray luminosity, Lx, its ratio with the stellar luminosity, Lx/Lstar, and the surface-averaged X-ray flux, Fxs -- on rotation period. We tested for differences in the distributions of Lx/Lstar of fast and slow rotators, accretors and non-accretors, and compared the dependence of Lx/Lstar on the ratio…

Plant phenology and genetic variability in root and nodule development strongly influence genetic structuring of Rhizobium leguminosarum biovar vicia…

2008

Publication Inra prise en compte dans l'analyse bibliométrique des publications scientifiques mondiales sur les Fruits, les Légumes et la Pomme de terre. Période 2000-2012. http://prodinra.inra.fr/record/256699; International audience; The symbiotic relationships between legumes and their nitrogen (N-2)-fixing bacterial partners (rhizobia) vary in effectiveness to promote plant growth according to both bacterial and legume genotype. To assess the selective effect of host plant on its microsymbionts, the influence of the pea (Pisum sativum) genotype on the relative nodulation success of Rhizobium leguminosarum biovar viciae (Rlv) genotypes from the soil populations during plant development h…

Search for a diffuse flux of astrophysical muon neutrinos with the IceCube 59-string configuration

2013

A search for high-energy neutrinos was performed using data collected by the IceCube Neutrino Observatory from May 2009 to May 2010, when the array was running in its 59-string configuration. The data sample was optimized to contain muon neutrino induced events with a background contamination of atmospheric muons of less than 1%. These data, which are dominated by atmospheric neutrinos, are analyzed with a global likelihood fit to search for possible contributions of prompt atmospheric and astrophysical neutrinos, neither of which have yet been identified. Such signals are expected to follow a harder energy spectrum than conventional atmospheric neutrinos. In addition, the zenith angle dist…

Importance de la variabilité génétique bactérienne sur le fonctionnement de la symbiose Rhizobium leguminosarum biovar viciae avec le pois (Pisum sat…

2008

Les irrégularités de rendement et de teneur en protéine des graines que présente la culture du pois sont, en partie, liées à des problèmes de nutrition azotée. En tant que légumineuse, la nutrition azotée du pois repose à la fois sur la fixation symbiotique de l’azote atmosphérique et sur l’absorption racinaire des nitrates du sol. Notre principal objectif a été de déterminer si le partenaire bactérien, Rhizobium leguminosarum biovar viciae (Rlv), peut être un facteur limitant de la nutrition azotée et du rendement du pois. La variabilité génétique des Rlv et les facteurs influençant la structure des populations de Rlv à l'état libre et symbiotiques ont été étudiés. La signification de la d…

Selēnsaturošo aminoskābju noteikšana brokoļos

2017

Selēnsaturošo aminoskābju noteikšana brokoļos. Graudiņa L., zinātniskā vadītāja Dr.ķīm. Nakurte I. Maģistra darbs, 43 lappuses, 23 literatūras avoti, 17 attēli, 9 tabulas, 1 pielikumi. Latviešu valodā. Veicot literatūras izpēti, tika iegūts priekšstats par selēna iedarbību uz cilvēka organismu. Tika apskatītas arī optimālākās paraugu sagatavošanas metodes un populārākās analīzes metodes selēnsaturošo aminoskābju izdalīšanai un noteikšanai augu valsts produktos. Maģistra darba praktiskajā daļā pētīti trīs veikalā nopērkami brokoļu paraugi, kā arī pašu diedzētie brokoļu dīgsti. Selēnsaturošo aminoskābju izdalīšanai no paraugiem izmantotas divas ekstrakcijas metodes. Pētāmo savienojumu noteikš…

Suppressor of cytokine signaling 3 sensitizes anaplastic thyroid cancer to standard chemotherapy

2009

We previously showed that cancer cells from papillary, follicular, and anaplastic thyroid carcinomas produce interleukin-4 and interleukin-10, which counteract the cytotoxic activity of conventional chemotherapy through the up-regulation of antiapoptotic molecules. Here, we identify Janus kinase/signal transducers and activators of transcription (STAT) and phosphatidyl inositol 3-kinase (PI3K)/AKT as the down-stream pathways through which these cytokines confer resistance to cell death in thyroid cancer. We found that the absence of suppressors of cytokine signaling (SOCS) molecules allows the propagation of the survival signaling. Exogenous expression of SOCS1, SOCS3, and SOCS5 in the high…