Search results for " composition"

Optische aktivität bei copolymeren aus (—)-acrylsäure-menthylester und styrol

1965

Die Copolymerisation von (–)-Acrylsaure-menthylester mit Styrol wurde untersucht. Die Copolymerisationsparameter betragen: r1 = 0,28 (Acrylsaurementhylester), r2 = 0,84 (Styrol); hieraus folgt fur Q = 0,45 und e = 0,40. Die spezifische Drehung der Copolymeren erwies sich bei 5 Wellenlangen als lineare Funktion des Acrylsaurementhylestergehaltes. Aus den Drehwerten kann daher die Zusammensetzung bestimmt werden; Ruckschlusse auf die Sequenzlangenverteilung sind aber nicht moglich. The copolymerization of (—)-menthyl acrylate with styrene was investigated. The reactivity ratios and the Q- and e-values were found to be: r1 = 0.28 (menthylacrylate), r2 = 0.84 (styrene); Q = 0.45, e = 0.40. The …

Compositional analysis of styrene and maleic anhydride copolymerization: Complex model and penultimate model

1985

Chemical Composition of the Essential Oils ofPistacia atlanticaDesf.

2005

The chemical composition of the three essential oils obtained by hydrodistillation of the resin, leaves and fruits of Pistacia atlantica Desf. (Anacardiaceae) was studied by GC and GC/MS. Monoterpene hydrocarbons constituted the main chemical group in the resin oil, with α-pinene (42.9%) and β-pinene (13.2%) as the major components. Oil of the fruits contained high amounts of oxygenated monoterpenes, with bornyl acetate (21.5%) as the major component, while oxygenated monoterpenes and sesquiterpenes were found to predominate in the oil of leaves among which terpinen-4-ol (21.7%) and elemol (20.0%) were the most abundant components.

Volatile Constituents ofTeucrium poliumL. from Turkey

1998

Abstract The volatile constituents obtained from the aerial parts of Teucrium polium were analyzed by GC and GC/MS. The oil was found to contain 37 components, of which 30 were identified. The major constituents were β-pinene (18.0%), β-caryophyllene (17.8%), α-pinene (12.0%), caryophyllene oxide (10.0%), myrcene (6.8%) and germacrene-D (5.3%)

Associations of age, body size, and maturation with physical activity intensity in different laboratory tasks in children

2021

We investigated the associations of age, sex, body size, body composition, and maturity with measures of physical activity (PA) intensity in children. PA intensity was assessed using VO2 as % of VO2reserve or VO2 at ventilatory threshold (VT), muscle activity measured by textile electromyography, mean amplitude deviation (MAD) measured by accelerometry, and metabolic equivalent of task (MET) during laboratory activities.Age, stature, and muscle mass were inversely associated with VO2 as % of VO2reserve and % of VT, during walking or running on a treadmill for 4, 6, and 8 km/h (Spearman r = -0.645 to -0.358). Age was inversely associated with MAD during walking on treadmill for 4 km/h (r = -…

Can Physiological and Psychological Factors Predict Dropout from Intense 10-Day Winter Military Survival Training?

2020

Background: In the military context, high levels of physiological and psychological stress together can compromise individual&rsquo

Le giuste operazioni

2019

The relationship between abstract art and architecture is briefly commented as against the research work of Lorenzo Degli Esposti's book Operazioni in arte ed in architettura. especially the conceptual work of Sol LeWitt, and Smythson is focused commenting upon its use in architectural design and namely in compositional methods.

Effect of Pulp Pigmentation Intensity on Consumer Acceptance of New Blood Mandarins: A Cross-Cultural Study in Spain and Italy

2022

One of the current objectives of different citrus breeding programmes is obtaining new pigmented mandarins. This study investigates to what extent consumer preferences, expectations and purchase intention are affected by the appearance of new mandarins, specifically pulp pigmentation intensity. Four hundred consumers from both Italy and Spain (800 in all) participated in the study. In each country, half were informed about the healthy properties of the anthocyanins responsible for red pulp colouration, while the other half were not. Italians more readily accepted new mandarin varieties than Spaniards, which was linked to them being more familiar with blood oranges. In Italy, both slight- an…

Denitrifying microbial communities along a boreal stream with varying land-use

2019

Streams have an important role in regulating nitrogen (N) transportation from terrestrial ecosystems to downstream waters. Here, we examined how catchment land-use affects potential denitrification rates and the function and composition of denitrifier communities in boreal stream sediments, using stable isotope incubations and qPCR and 454-pyrosequencing targeted on nirS, nirK and nosZ genes. Although land-use influenced the water chemistry as higher nitrite + nitrate (NO x − ) concentration at the agriculture-affected sampling point, sediment organic matter content was found to be the key factor in regulating potential denitrification rates. However, the abundance as well as the diversity …

Microbial Community Response on Wastewater Discharge in Boreal Lake Sediments

2017

Despite high performance, municipal wastewater treatment plants (WWTPs) still discharge significant amounts of organic material and nitrogen and even microbes into the receiving water bodies, altering physico-chemical conditions and microbial functions. In this study, we examined how nitrified wastewater affects the microbiology of boreal lake sediments. Microbial community compositions were assessed with next generation sequencing of the 16S rRNA gene, and a more detailed view on nitrogen transformation processes was gained with qPCR targeting on functional genes (nirS, nirK, nosZI, nosZII, amoAarchaea, and amoAbacteria). In both of the two studied lake sites, the microbial community compo…