Search results for " Control"

Out‐of‐Equilibrium (Supra)molecular Systems and Materials: An Introduction

2021

Mineral Profile

2013

The identification of foods with protected designation of origin (PDO) has been a long-standing issue. Its detection provides valuable information to regulatory commissions (government and industries) which can regulate precise quality control procedures for their products. Authentication of food covers many different aspects, including characterization, mislabelling and misinformation regarding origin, and adulteration, which is defined as the process to reduce the quality or nature of a given substance by adding a foreign or an inferior substance and removing a vital element. Numerous methods have been developed as fingerprinting methodologies for PDO products. The analytical techniques c…

A theoretical study of the electronic spectrum of styrene

1999

Abstract The electronic spectrum of styrene has been studied by using multiconfigurational second-order perturbation theory (CASPT2). The study includes geometry optimization of the ground state, the lowest triplet state, and the lowest singlet excited state. The covalent 2 1 A ′ state placed vertically at 4.34 eV is assigned to the first band. The 1 1 A ′→3 1 A ′ transition located at 4.97 eV is responsible for the second band. The most intense feature involves the 5 1 A ′ state, which is calculated to lie 6.19 eV above the ground state. The lowest singlet–singlet Rydberg transition (3s) is predicted to occur at 5.85 eV.

Inside Back Cover: Kinetically Controlled Sequential Growth of Surface-Grafted Chiral Supramolecular Copolymers (Angew. Chem. Int. Ed. 25/2016)

2016

Modellbetrachtung zur Radikalausbeute bei der radikalischen Polymerisation

1974

Die kinetisch wirksame Radikalausbeute ist eine chemisch und diffusionskontrollierte Grose. Der Grad der jeweiligen Kontrolle ist systemspezifisch. Die chemische Kontrolle geht hauptsachlich von der Kettenstartreaktion, die Diffusionskontrolle von der Primarradikalrekombination aus. Die entwickelte Modellvorstellung erfast diese konkurrierenden Einflusse. Mittlere Diffusionswege der Primarradikale bis zu ihrer Rekombination werden abgeschatzt. The kinetically effective radical efficiency is chemically and diffusion controlled. The proportion of each control mechanism characterizes the polymerizing system. The chemical control can be deduced from the chain initiation reaction, the diffusion …

Chemo-orientation responses in hymenopteran parasitoids induced by substrate-borne semiochemicals

2013

Hymenopteran parasitoids can utilize substrate-borne semiochemicals released by conspecifics or by their hosts, increasing the likelihood of successful mating and host location. According to the literature, two substrate-borne chemo-orientation patterns can occur: (1) biased random searching, a non-directional reaction toward the chemicals (kinesis), and (2) trailfollowing searching, a directional response toward the source emitting the chemical compounds (taxis). These two different strategies can be adopted by parasitoids to locate hosts and mates. In host location, random searching is induced by allelochemicals indirectly associated with the host, whereas trail-following behavior is indu…

2021

To what extent the intake of fruit and vegetables (FV) influences inflammatory status remains elusive, particularly in older populations. The aim of the present study was to determine the effect of increased FV intake for 16 weeks on circulating biomarkers of inflammation in a population of older men and women. Sixty-six participants (65–70 years) randomly assigned to either FV or control (CON) groups were instructed to increase FV intake to five servings per day through nutritional counseling (FV) or to maintain habitual diet (CON). Dietary intake and physical activity level (PA) were determined using food frequency questionnaire and accelerometers, respectively, at the start and end of th…

A 1-year maintenance after early adjuvant intravesical chemotherapy has a limited efficacy in preventing recurrence of intermediate risk non-muscle-i…

2010

Study Type – Therapy (RCT) Level of Evidence 1b OBJECTIVE To evaluate the efficacy of 1-year maintenance after a 6-week cycle of early intravesical chemotherapy, as the role of maintenance in intravesical chemotherapy is debated. PATIENTS AND METHODS Between May 2002 and August 2003, 577 patients with non-muscle-invasive bladder cancer (NMI-BC) underwent transurethral resection (TUR) and early intravesical chemotherapy (epirubicin, 80 mg/50 mL). They were randomized between a 6-week induction cycle and the induction cycle plus maintenance with 10 monthly instillations. In all, 95 patients with T1G3, Tis or single and primary Ta–T1 G1–G2 tumours were excluded; 482 patients at intermediate ri…

County-level socioeconomic and crime risk factors for substantiated child abuse and neglect.

2019

Rates of substantiated child abuse and neglect vary significantly across counties. Despite strong cross-sectional support for links between social-contextual characteristics and abuse and neglect, few longitudinal studies have tested relations between these risk factors and substantiated rates of abuse/neglect. The goal of this study was to identify county-level socioeconomic and crime factors associated with substantiated abuse/neglect rates over 13 years (2004-2016). Annual county-level data for Tennessee, obtained from the KIDS COUNT Data Center, included rates of substantiated child abuse and neglect, children's race and ethnicity, births to unmarried women, teen birth rate, children in…

Child maltreatment by nursing staff and caregivers in German institutions: A population-representative analysis.

2019

Abstract Background Child maltreatment by caregivers seem to make a significant contribution to general maltreatment rates. Interestingly, research assessing prevalence rates of maltreatment mainly focuses on individual components either in relation to different types of maltreatment or in relation to different types of institutions. Objective The current study assesses prevalence rates for child maltreatment by caregivers in hospitals, rehabilitation centers, facilities for the disabled, schools, Kindergartens, and after-school care or residential care. Participants and setting: In a cross-sectional survey, a representative sample of the German population above the age of 14 (N = 2,516) wa…