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排序方式: 共有484条查询结果,搜索用时 37 毫秒
481.
Michal Obergruber Vladimír Hnig Petr Prochzka Viera Ku
erov Martin Kotek Jií Bou
ek Jakub Maík 《Materials》2021,14(4)
Biobutanol is a renewable, less polluting, and potentially viable alternative fuel to conventional gasoline. Biobutanol can be produced from same sources as bioethanol, and it has many advantages over the widespread bioethanol. This paper systematically analyzes biobutanol fuel as an alternative to bioethanol in alcohol–gasoline mixtures and the physicochemical properties. Based on the conducted analyses, it was found that biobutanol mixtures have a more suitable behavior of vapor pressure without the occurrence of azeotrope, do not form a separate phase in lower temperature, it has higher energy density, but slightly reduce the octane number and a have higher viscosity. However, in general, biobutanol has many advantageous properties that could allow its use in gasoline engines instead of the commonly used bioethanol. 相似文献
482.
Viera Kalinina Ayuso Nathalia Makhotkina Maretta van Tent-Hoeve Jolanda D.F. de Groot-Mijnes Nico M. Wulffraat Aniki Rothova Joke H. de Boer 《Survey of ophthalmology》2014
Juvenile idiopathic arthritis (JIA) is the most common childhood rheumatic disease and the most prevalent systemic disorder in children with uveitis. The current prevailing opinion is that JIA is a multifactorial, genetically predisposed autoimmune disorder that can be influenced by environmental factors and infections; the specific pathogenesis of JIA-associated uveitis is not understood, however, nor has the relationship between the eye and joint inflammation been established. Nevertheless, subtypes of JIA that are associated with uveitis, oligoarthritis, polyarticular rheumatoid factor negative, and psoriatic arthritis appear to have common pathogenicity. We summarize our current knowledge regarding the pathogenesis of JIA-associated uveitis and discuss the possible role of immune responses and cytokine involvement, genetic associations, and the influence of external triggers in this disease—an association that is supported by data obtained from arthritis research and experimental uveitis models. 相似文献
483.
Simon Granak Klara Tuckova Viera Kutna Iveta Vojtechova Laura Bajkova Tomas Petrasek Saak V. Ovsepian 《The European journal of neuroscience》2023,57(1):17-31
Autism spectrum disorder (ASD) is a neurodevelopmental condition causing a range of social and communication impairments. Although the role of multiple genes and environmental factors has been reported, the effects of the interplay between genes and environment on the onset and progression of the disease remains elusive. We housed wild-type (Tsc2+/+) and tuberous sclerosis 2 deficient (Tsc2+/−) Eker rats (ASD model) in individually ventilated cages or enriched conditions and conducted a series of behavioural tests followed by the histochemical analysis of dendritic spines and plasticity in three age groups (days 45, 90 and 365). The elevated plus-maze test revealed a reduction of anxiety by enrichment, whereas the mobility of young and adult Eker rats in the open field was lower compared to the wild type. In the social interaction test, an enriched environment reduced social contact in the youngest group and increased anogenital exploration in 90- and 365-day-old rats. Self-grooming was increased by environmental enrichment in young and adult rats and decreased in aged Eker rats. Dendritic spine counts revealed an increased spine density in the cingulate gyrus in adult Ekers irrespective of housing conditions, whereas spine density in hippocampal pyramidal neurons was comparable across all genotypes and groups. Morphometric analysis of dendritic spines revealed age-related changes in spine morphology and density, which were responsive to animal genotype and environment. Taken together, our findings suggest that under TSC2 haploinsufficiency and mTORC1 hyperactivity, the expression of behavioural signs and neuroplasticity in Eker rats can be differentially influenced by the developmental stage and environment. 相似文献
484.