Search results for "stil"

Some substrates and inhibitors of cytosolic epoxide hydrolase induce sister-chromatid exchanges in mammalian cells, but do not induce gene mutations …

1993

Abstract Trans -stilbene oxide, trans -β-methylstyrene, 7,8-oxide, trans -β-ethylstyrene, 7,8-oxide, trans -β-propylstyrene 7,8-oxide and 4-fluorochalcone oxide were investigated for genotoxic activity in bacterial and mammalian cells, in the absence of external xenobiotic-metabolising systems. All compounds strongly enhanced the frequency of sister-chromatid exchanges (SCE) in cultured human lymphocytes. None of them was mutagenic in Salmonella typhimurium (reversion of the his − strains TA98, TA100 and TA104). The limit of detection was 1 20,000 to 1 10 6 of the activity of the positive control, benzo[ a ]pyrene 4,5-oxide, depending on the compound and the bacterial strain. Trans -β-methy…

Metabolites of diethylstilboestrol induce sister chromatid exchange in human cultured fibroblasts

1979

Diethylstilboesterol (DES) is one of the few substances for which a clear association with carcinogenicity has been established in man. Nevertheless, it is still widely used, mainly as a cheap oestrogen to increase the slaughter weight of beef, but in spite of this it is not known if residues in the meat or metabolites excreted by the cattle are hazardous to man. It is also unknown whether there is a threshold dose below which DES is harmless. A threshold might be expected if a hormonal mechanism of carcinogensis rather than metabolic activation to an electrophically reactive species operats. This possibility was supported by the observations that DES, in contrast to most other carcinogens,…

PLLA biodegradable scaffolds for angiogenesis via Diffusion Induced Phase Separation (DIPS)

2008

A critical obstacle in tissue engineering is the inability to maintain large masses of living cells upon transfer from the in vitro culture conditions into the host in vivo. Capillaries, and the vascular system, are required to supply essential nutrients, including oxygen, remove waste products and provide a biochemical communication “highway”. For this reason it is mandatory to manufacture an implantable structure where the process of vessel formation – the angiogenesis – can take place. In this work PLLA scaffolds for vascular tissue engineering were produced by dip-coating via Diffusion Induced Phase Separation (DIPS) technique. The scaffolds, with a vessel-like shape, were obtained by p…

Socialização parental: adaptação ao Brasil da escala ESPA29

2011

The objective of this study was to analyze the psychometric properties of the Brazilian version of the ESPA29 Parental Socialization Scale (Musitu & Garcia, 2001). This scale allows measuring parental styles - authoritative, authoritarian, indulgent, and negligent - by means of two independent dimensions of parental conduct extracted from parents' use of different socialization practices. Using a sample of 2.105 Brazilian adolescents from 10 to 18 years old, the structure of two factors that define the scale - Acceptance/Implication and Strictness/Imposition - has been replicated using an exploratory factorial analysis. In order to complete a proper replication of the ESPA29 scale structure…

Jaunākā skolas vecuma bērnu emocionālo inteliģenci sekmējoša skolas kultūra

2020

Darba autors, piedzīvojot dažādus vadības un mācīšanas stilus, ir novērojis, ka tie tiešā veidā ietekmē to, kā jūtas skolēns, viņa produktivitātes līmeni un motivāciju. Viena mācību stunda var būt prieka pilna un iedvesmojoša, bet cita – nomācoša un biedējoša. Tāpēc bija svarīgi noteikt, kādi mācīšanās stila aspekti ietekmē skolēnus pozitīvi, kuri – negatīvi. Kamēr tika meklēta informācija, darba autors nonāca līdz secinājumam, ka mācīšanas stils paslēpjas zem tēmas – skolas kultūra, kurai piemīt lielākā ietekme uz skolēna personības attīstība un šī attīstība paiet apakšā zem skolēnu emocionālās inteliģences. Vēlāk tika noteikts, ka skolas kultūru ietekmē katra skolotāja kultūras līmenis, k…

Hydraulic kinetics of the graft union in different Olea europaea L. scion/rootstock combinations

2007

The hydraulic resistance of young olive trees grafted on rootstocks with contrasting size-controlling potential was measured 30, 90, 360 and 480 days after grafting. Olive (Olea europaea L.) clones inducing plant vigorous growth (Leccino ‘Minerva’, LM) or dwarfing (Leccino ‘Dwarf’, LD) were studied in different scion/rootstock combinations (LD/LD, LD/LM, LM/LD, LM/LM). Plants growing on LD root systems developed lower leaf surface areas (about 50% less) than plants grafted on LM rootstocks. Graft union represented the largest fraction (up to 85%) of whole-plant hydraulic resistance 30 days after grafting, and still represented an important fraction of it 2 months later (40–55%). Four-hundre…

Presentazione di Gesù al tempio. Proporzioni e composizione

2009

Lo studio individua i sistemi proporzionali e compositivi del quadrone in stucco raffigurante La presentazione di Gesù al tempio, situato nella chiesa di S. Spirito, realizzato da Giacomo Serpotta agli inizi del XVIII secolo; all’interno del quadrone si alternano sia figure a tuttotondo, sia altorilievi che bassorilievi. Oltre lo studio delle proporzioni si sono analizzati alcuni elementi della grammatica visiva come la composizione e lo spazio. La rappresentazione illusoria dello spazio - di cui Giacomo Serpotta era un interprete eccezionale - come infinita e molteplice continuità spaziale, nasce da una nuova concezione dello spazio maturata dalla crisi della cultura umanistica e rinascime…

Conclusion: Tying It All Together

2018

In this last section of the book, I will try and tie all the earlier discussions together. Expanding on the previous sections, I conclude that from the three concepts, the first is of most importance—the internal dynamics of the music industries. The concept has significant explanatory power as a factor on its own, as well as having significant impact on the two other factors. The internal structures and the (dysfunctional) nature of the music industries clearly create internal frustrations and external hostility. And more importantly, it seems to prevent the music industries from acting on the digital potential that appears.

Linguistica Lettica, Nr. 12

2003

Dynamic Family System Trajectories From Pregnancy to Child's First Year

2014

According to family systems theory, families consist of hierarchically ordered parts, from basic dyadic relations to marital and parental subsystems (Minuchin, 1985). In the transition to parenthood, family relationships change as the family system adapts to the new situation. Thechanges,suchasimprovementsanddeclines in relationship quality, are different and unique, depending on how emotions and responsibili- ties are shared in the family. For instance, fam- ilies with well-functioning relationships during pregnancy tend also to fare well in the postpar- tum period, whereas families with problematic relationships often experience further decline in their relationship quality across the tra…