Search results for "GRI"

Benzpinakola un tā piemaisījumu atdalīšana ar AF-AEŠH

2015

Benzpinakona un tā piemaisījumu sadalīšana ar apgrieztās fāzes augsti efektīvo šķidrumu hromatogrāfiju. Ernstsons A., darba zinātniskā vadītāja doktorante Mg. chem. Rotkāja.O. bakalaura darbs, 35 lappuses, 21 attēls, 4 tabulas, 27 atsauces, 2 pielikumi. Latviešu valodā. Lai izstrādātu metodi benzpinakona un tā piemaisījumu sadalīšanai ar apgrieztās fāzes augsti efektīvo šķidrumu hromatogrāfiju eksperimentālajā daļā tika izmantotas divas kolonnas YMC Pack C8 un Cosmosil C18-MSII un divas kustīgās fāzes acetonitrils/ūdens, metanols/ūdens. Eksperimentu rezultātā tika noskaidrots, ka benzpinakona un tā piemaisījumu sadalīšanai piemērotāka ir Cosmosil C18-MSII kolonna un kustīgā fāze metanols/ūd…

Table ronde - Comment construire le programme TETRAE avec les acteurs du développement agricole ?

2021

Effets du mode de travail du sol sur les microorganismes à l'échelle du profil cultural

2009

MULTI-OBJECTIVE OPTIMISATION OF BUILDINGS AND BUILDING CLUSTERS PERFORMANCE: A LIFE CYCLE THINKING APPROACH

2021

The Agr communication system provides a benefit to the populations of Listeria monocytogenes in soil

2014

International audience; In this study, we investigated whether the Agr communication system of the pathogenic bacterium Listeria monocytogenes was involved in adaptation and competitiveness in soil. Alteration of the ability to communicate, either by deletion of the gene coding the response regulator AgrA (response-negative mutant) or the signal pro-peptide AgrD (signal-negative mutant), did not affect population dynamics in soil that had been sterilized but survival was altered in biotic soil suggesting that the Agr system of L. monocytogenes was involved to face the complex soil biotic environment. This was confirmed by a set of co-incubation experiments. The fitness of the response-negat…

Consumer texture preferences: Effect of age, gender and previous experience

2000

Four different strawberry candies with varying thickening agents (pectin, gelatin, starch, and gelatin + starch) were rated by three consumer age groups: teenagers (13–14 years), young adults (19–23 years) and the middle-aged (40–63 years) (n = 60 in each group). Age, gender, use frequencies and hedonic ratings often commercial candy types were collected as background information. Four preference groups were found by using preference mapping. The most important factor predicting preference of a sample were hedonic evaluations of commercial candies whose texture was similar to that of the test sample. If the consumers gave high hedonic ratings to one sample they also tended to report liking …

Recent trends in rapid detection of influenza infections by bio and nanobiosensor

2018

Abstract A literature update has been made about the progress and improvements in the use of biosensors for sensitive, rapid and specific detection of influenza virus. Background information about influenza virus and its structure together with a general discussion about the characteristics and significant aspects of different types of biosensors were used as a frame to put inside the main recent developments on the use of nanobiosensors for the detection of influenza virus. Working criteria of biosensors and their applications in different species of influenza virus diagnosis have been the primary concern of this review, which critically discusses the main advantages and limitations of stu…

Plant-associated microbiota as a source of antagonistic bacteria against the phytopathogen Erwinia amylovora.

2022

Control of bacterial plant diseases is a major concern, as they affect economically important species and spread easily, such as the case of fire blight of rosaceous caused by Erwinia amylovora. In the search for alternatives to the use of agrochemicals and antibiotics, this work presents a screening of natural bacterial antagonists of this relevant and devastating phytopathogen. We recovered bacterial isolates from different plant tissues and geographical origins and then selected those with the strongest ability to reduce fire blight symptoms ex vivo and remarkable in vitro antagonistic activity against E. amylovora. None of them elicited a hypersensitivity reaction in tobacco leaves, mos…

Culture and Real-time Polymerase Chain reaction sensitivity in the diagnosis of invasive meningococcal disease: Does culture miss less severe cases?

2019

BackgroundInvasive meningococcal disease (IMD) is a highly lethal disease. Diagnosis is commonly performed by culture or Realtime-PCR (qPCR).AimsOur aim was to evaluate, retrospectively, whether culture positivity correlates with higher bacterial load and fatal outcome. Our secondary aim was to compare culture and qPCR sensitivity.MethodsThe National Register for Molecular Surveillance was used as data source. Cycle threshold (CT), known to be inversely correlated with bacterial load, was used to compare bacterial load in different samples.ResultsThree-hundred-thirteen patients were found positive for Neisseria meningitidis by qPCR, or culture, or both; 41 died (case fatality rate 13.1%); 1…

Novel M. tuberculosis specific IL-2 ELISpot assay discriminates adult patients with active or latent tuberculosis

2018

Background Tuberculosis (TB) still is a major worldwide health problem, with 10.4 million new cases in 2016. Only 5–15% of people infected with M. tuberculosis develop TB disease while others remain latently infected (LTBI) during their lifetime. Thus, the absence of tests able to distinguish between latent infection and active tuberculosis is one of the major limits of currently available diagnostic tools. Methods A total of 215 patients were included in the study as active TB cases (n = 73), LTBI subjects (n = 88) and healthy persons (n = 54). Peripheral blood mononuclear cells (PBMCs) were isolated from each patient and the LIOSpot® TB anti-human IL-2 ELISpot assay was performed to test …