Search results for "Micro"

Dynamics of soil organic matter pools after agricultural abandonment

2014

Changes of land use from croplands to natural vegetation usually increase Carbon (C) stocks in soil. However, the contribution of old and new C to various pools still is not clearly analyzed.We measured the 13C signature of soil organic carbon (SOC) pools after vegetation change from vineyard (C3) to grassland (C4) under Mediterranean climate to assess the changes of old and new C in total SOC, microbial biomass (MB), dissolved organic C (DOC), and CO2 efflux from soil. Development of the perennial grass Hyparrhenia hirta (C4) on vineyard abandoned for 15 or 35 years ago increased C stocks for 13% and 16%, respectively (in the upper 15 cm). This increase was linked to the incorporation of n…

Nuevas faunas de micromamíferos del Terciario continental de la Depresión Intermedia (provincia de Cuenca, España centro-oriental)

1986

In this paper the fossil content of nine new micromammal bearing localities and that of 15 levels in a borehole from the Loranca Basin (eastern Tague Basin, Prov. of Cuenca) is described. The age ranges from early Arvernian (Late Oligocene) to Turolian (Late Miocene). 47 rodent and lagomorph taxons have been found which are arranged in 8 biostratigraphic units. The Loranca-2 borehole contains 15 fossiliferous levels covering the Upper Oligocene/Lower Miocene. These additional data complete the faunal sequence published by Díaz & López(1919). The stratigraphic framework of the basin needs a revision because of the new faunal data.<br><br>Se presenta una serie de 9 nuevos yaci…

Influence of a Thiolate Chemical Layer on GaAs (100) Biofunctionalization: An Original Approach Coupling Atomic Force Microscopy and Mass Spectrometr…

2013

International audience; Widely used in microelectronics and optoelectronics; Gallium Arsenide (GaAs) is a III-V crystal with several interesting properties for microsystem and biosensor applications. Among these; its piezoelectric properties and the ability to directly biofunctionalize the bare surface, offer an opportunity to combine a highly sensitive transducer with a specific bio-interface; which are the two essential parts of a biosensor. To optimize the biorecognition part; it is necessary to control protein coverage and the binding affinity of the protein layer on the GaAs surface. In this paper; we investigate the potential of a specific chemical interface composed of thiolate molec…

Contribution of Molecular Structure to Self-Assembling and Biological Properties of Bifunctional Lipid-Like 4-(

2019

The design of nanoparticle delivery materials possessing biological activities is an attractive strategy for the development of various therapies. In this study, 11 cationic amphiphilic 4-(N-alkylpyridinium)-1,4-dihydropyridine (1,4-DHP) derivatives differing in alkyl chain length and propargyl moiety/ties number and position were selected for the study of their self-assembling properties, evaluation of their cytotoxicity in vitro and toxicity on microorganisms, and the characterisation of their interaction with phospholipids. These lipid-like 1,4-DHPs have been earlier proposed as promising nanocarriers for DNA delivery. We have revealed that the mean diameter of freshly prepared nanoparti…

Le potenzialità delle colture in vitro nella conservazione e diffusione di germoplasma di Morus spp.

2009

Automated Detection of Microaneurysms Using Scale-Adapted Blob Analysis and Semi-Supervised Learning

2014

International audience; Despite several attempts, automated detection of microaneurysm (MA) from digital fundus images still remains to be an open issue. This is due to the subtle nature of MAs against the surrounding tissues. In this paper, the microaneurysm detection problem is modeled as finding interest regions or blobs from an image and an automatic local-scale selection technique is presented. Several scale-adapted region descriptors are then introduced to characterize these blob regions. A semi-supervised based learning approach, which requires few manually annotated learning examples, is also proposed to train a classifier to detect true MAs. The developed system is built using only…

Apple, Ibm and Microsoft in a war of signs

2007

The aim of my paper is exploring how image contributes on building the brand identity of specific organisations and how the meaning of the image can be resignified by the action of the players in a specific market. In particular, I will focus on the competition between three brands, Ibm, Apple, Microsoft. on the information technology market. My work is looking forward to be a continuation of the essay “Le vie du Logo” published in “Identités visuelles” by Jean Marie Floch about the visual competition between Apple and Ibm. I will use the tools of sociosemiotics, plastic and figurative analysis, screening more than 20 years of competition starting from 1984, the year in which the analysis o…

Consensus nomenclature for CD8(+) T cell phenotypes in cancer

2015

International audience; Whereas preclinical investigations and clinical studies have established that CD8+ T cells can profoundly affect cancer progression, the underlying mechanisms are still elusive. Challenging the prevalent view that the beneficial effect of CD8+ T cells in cancer is solely attributable to their cytotoxic activity, several reports have indicated that the ability of CD8+ T cells to promote tumor regression is dependent on their cytokine secretion profile and their ability to self-renew. Evidence has also shown that the tumor microenvironment can disarm CD8+ T cell immunity, leading to the emergence of dysfunctional CD8+ T cells. The existence of different types of CD8+ T…

Clostridium difficile Induced Inflammasome Activation and Coagulation Derangements

2022

C. difficile enterocolitis (CDAC) is the most common hospital infection, burdened by an increased incidence of coagulation-related complications such as deep vein thrombosis (DVT) and disseminated intravascular coagulation (DIC) as well as a significant sepsis-related mortality. In this review, we analyzed the available data concerning the correlation between coagulation complications related to C. difficile infection (CDI) and inflammasome activation, in particular the pyrin-dependent one. The little but solid available preclinical and clinical evidence shows that inflammasome activation increases the risk of venous thromboembolism (VTE). As proof of this, it has been observed that in vitr…

Servera uzstādīšana nelielam birojam

2015

Šī darba mērķis ir nelielam birojam izveidot serverus ar dažādām lomām ar virtuālo mašīnu palīdzību. Servera pamatā būs Windows Server 2012 R2 Standart. Serveriem jābūt uzstādītiem kvalitatīvi. Uz serveriem tiek uzstādīta nepieciešamā programmatūra šī biroja vajadzībām, bet šāda programmatūra var noderēt gandrīz visos parastos birojos. Darba uzdevumos arī ietilpst izveidot drošu un regulāru rezervju kopiju veidošanu. Kā arī jānodrošina tīkla drošība no dažādiem draudiem un vīrusiem, tas ir izdarāms ar pretvīrusu programmām un ugunsmūriem.