Search results for "Uber"
showing 10 items of 1027 documents
Regulation of Rooting Ability of Solanum tuberosum L. Explants by Gaseous Environment, In Vitro
1997
It has been reported by many investigators that morphogenesis of expiant tissue can be regulated by the composition of the nutrient medium as well as by the gaseous environment (Buddendorf-Joosten and Woltering, 1994). The aim of the present study was to investigate different effects on rooting ability of potato expiants in vitro, caused by limited gas exchange and IBA and BAP treatment.
Study and characterization of polyphenol oxidase from eggplant (Solanum melongena L.)
2011
ABSTRACT: In this study the catecholase and cresolase activities of eggplant polyphenol oxidase (PPO) were investigated. Enzyme activity was determined by measuring the increase in absorbance using catechol as substrate and 3-methyl-2- benzothiazolinone hydrazone (MBTH) as coupled reagent. The effects of substrate specificity, heat inactivation, temperature, pH, and inhibitors were investigated to understand the enzymatic alteration of ready-to-eat preparations. Browning of vegetables was determined through a colorimeter. Decrease of lightness (L*) and increase of color difference values (ΔE*) were correlated with tissue browning. Antibrowning agents were tested on PPO under the same condit…
Long-term thermophilic mono-digestion of rendering wastes and co-digestion with potato pulp
2014
In this study, mono-digestion of rendering wastes and co-digestion of rendering wastes with potato pulp were studied for the first time in continuous stirred tank reactor (CSTR) experiments at 55°C. Rendering wastes have high protein and lipid contents and are considered good substrates for methane production. However, accumulation of digestion intermediate products viz., volatile fatty acids (VFAs), long chain fatty acids (LCFAs) and ammonia nitrogen (NH4-N and/or free NH3) can cause process imbalance during the digestion. Mono-digestion of rendering wastes at an organic loading rate (OLR) of 1.5 kg volatile solids (VS)/m(3)d and hydraulic retention time (HRT) of 50 d was unstable and resu…
Co-evolution of three mega-trends nurtures un-captured GDP : Uber's ride-sharing revolution
2016
Uber used a disruptive business model driven by digital technology to trigger a ride-sharing revolution. The institution- al sources of the company’s platform ecosystem architecture were analyzed to explain this revolutionary change. Both an empirical analysis of a co-existing development trajectory with taxis and institutional enablers that helped to create Uber’s platform ecosystem were analyzed. The analysis identified a correspondence with the “two-faced” nature of ICT that nurtures uncaptured GDP. This two-faced nature of ICT can be attributed to a virtuous cycle of decline in prices and an increase in the number of trips. We show that this cycle can be attributed to a self-propagating…
La construcción de la memoria colectiva: un ejemplo concreto
2004
La versión que aquí se facilita es el texto mecanografiado por el autor, que coincide con la versión publicada en la revista "Diogène". Este artículo también está disponible en versión francesa (en: Diogène, nº 201, 2003/1, pp. 17-28) e inglesa (en: Diogenes, nº 201, vol. 51, issue 1, 2004, pp. 17-26)
La construction de la mémoire collective. Du franquisme à la démocratie
2003
Tambien disponible en version espanola (en: Diogenes, no 201, marzo de 2004) e inglesa (en: Diogenes, no 201, vol. 51, issue 1, 2004, pp. 17-26)
An overview of the role of T cells in controlling tuberculosis infection in a pediatric population
2015
The most significant immunological studies of tuberculosis (TB) infection have involved adult patients. Few studies about the immune repertoire have been conducted in children. The purpose of this paper is to focus on cellular immune response to Mycobacterium tuberculosis by reviewing our studies conducted on children with different forms of TB infection between 1998 and 2006. Although the gold standard of TB diagnosis remains isolation of TB bacillus that also allows estimation of pattern of resistance of M. tuberculosis, the study of immune response can be useful for the early diagnosis and therapeutic follow-up of pediatric TB.
Impact of MHC class I alleles on the M. tuberculosis antigen-specific CD8+ T-cell response in patients with pulmonary tuberculosis
2007
Challenged by scattered understanding of protective immunity to Mycobacterium tuberculosis (MTB), we have mapped peptide epitopes to human leukocyte antigen (HLA)-A*0101, A*0201, A*1101, A*2402, B*0702, B*0801 and B*1501 of the secreted mycobacterial antigen Ag85B, a vaccine candidate that may be associated with immune protection. Affinity (ED(50)) and half-life (t(1/2), off-rate) analysis for individual peptide species on HLA-A and HLA-B molecules revealed binding ranges between 10(-3) and 10(-7) M. After selection of the best matches, major histocompatibility complex class I/peptide tetramer complexes were constructed to measure the CD8+ T-cell responses directly ex vivo in peripheral blo…
In vitro evaluation of poloxamer in situ forming gels for bedaquiline fumarate salt and pharmacokinetics following intramuscular injection in rats
2019
Graphical abstract
Teacher Training in Linguistic Diversity within Inclusive Education: Cooperation between Non-governmental Non-profit Organizations and Educational In…
2020
Esta tesis examina la colaboración entre las las organizaciones no gubernamentales sin ánimo de lucro centradas en los alumnos con una lengua materna diferente y los centros escolares de tres zonas geográficas europeas: República Checa, Italia y España. Responde a tres preguntas de investigación: (1) ¿Qué servicios ofrecen las organizaciones sin ánimo de lucro a los profesores? (2) ¿Cómo ven las organizaciones no lucrativas la cooperación actual? (3) ¿Conocen los profesores la existencia de organizaciones sin ánimo de lucro en este ámbito y están interesados en dicha cooperación? Se emplea un enfoque de métodos mixtos, aplicando un cuestionario a 34 organizaciones sin ánimo de lucro (9 chec…