Search results for "POPULATION"
showing 10 items of 9945 documents
Epidemiology of childhood cancer
2010
The present contribution reports childhood cancer incidence and survival rates as well as time trends and geographical variation. The report is based on the databases of population-based cancer registries which joined forces in cooperative projects such as Automated Childhood Cancer Information System (ACCIS) and EUROCARE. According to these data, which refer to the International Classification of Childhood Cancer, leukemias, at 34%, brain tumors, at 23%, and lymphomas, at 12%, represent the largest diagnostic groups among the under 15-year-olds. The most frequent single diagnoses are: acute lymphoblastic leukemia, astrocytoma, neuroblastoma, non-Hodgkin lymphoma, and nephroblastoma. There …
Zweitmalignome nach malignen Erkrankungen im Kindesalter
1995
Since 1980 the German Registry of Childhood Malignancies has been established. In the framework of the long-term follow-up secondary malignancies are reported continually to the registry. An additional retrospective inquiry to all treating clinicians and principal investigators of clinical trials as well as a link to a previously existing pool of secondary malignancies (1) lead to a completion of the data. At the registry now 329 patients with second malignant neoplasms have been observed. 41.3% of them had been developed the first malignancy before the registry started its work in 1980. The most common primary malignancies are acute lymphoblastic leukaemia (ALL, 28.6%), brain tumours (12.2…
Socially Responsible Investing and Public Pension Fund Performance in Latvia
2018
Currently Latvia runs a three-pillar pension system. Despite positive dynamics of change of net assets of pension schemes, investments into pension programs are not regarded as financial products that could be popular amongst the population of Latvia. This problem is one of the key social economic issues in society and therefore its solution, which should be developed with consideration of ethical principles of investment, is socially important, which is why it should be addressed by the state. The aim of this research is to consider social and economic aspects of activities of the 2nd pillar pension fund in Latvia and to identify the attitude of Latvian residents to investments into pensio…
Targeting antibiotic resistant bacteria with phages reduces bacterial density in an insect host
2018
Phage therapy is attracting growing interest among clinicians as antibiotic resistance continues becoming harder to control. However, clinical trials and animal model studies on bacteriophage treatment are still scarce and results on the efficacy vary. Recent research suggests that using traditional antimicrobials in concert with phage could have desirable synergistic effects that hinder the evolution of resistance. Here, we present a novel insect gut model to study phage-antibiotic interaction in a system where antibiotic resistance initially exists in very low frequency and phage specifically targets the resistance bearing cells. We demonstrate that while phage therapy could not reduce th…
Un análisis documental de la investigación en dislexia en la edad adulta
2016
La dislexia en la edad adulta afecta alrededor del 4% de la población. Por ello, el objetivo de este trabajo es analizar los aspectos metodológicos, así como los temas de investigación, acerca de la dislexia en población adulta. A partir de una búsqueda bibliográfica en la base de datos del Psychological Abstracts: PsycoINFO, se identifican y seleccionan los trabajos sobre los que se centra la revisión. Los resultados indican respecto a la metodología que la mayoría de estudios emplean métodos cuantitativos de investigación (59.4%), frente al 5.7% que emplea métodos cualitativos. También se emplean en el 10% de los trabajos diseños de N=1, y, en menos del 10%, entrevistas, estudios longitud…
Hartree-Fock calculations and photoelectron spectra of SSO and NSF
1974
Results from ab initio Hartree-Fock calculations on the ground states of SSO and NSF are reported. The calculations employ large basis sets of Gaussian functions of essentially double zeta quality. The photoelectron spectra of the bent triatomic molecules with 18 valence electrons, i.e. SSO, NSF, O3, SO2, NSCl are compared. Further experimental details of the photoelectron spectrum of SSO are presented and an assignment of the observed ionic states of SSO⊕ is attempted. The calculated dissociation energies, dipole moments and the population analyses are given. The correlation effect is qualitatively discussed in connection with the applicability of Koopmans' theorem for the bent tri-atomic …
Two‐Dimensional Electron Gas Effects on the Photoluminescence from a Nonintentionally Doped AlGaN/GaN Heterojunction
2002
Photoluminescence measurements on an AlGaN/GaN single heterojunction (SH), where piezoelectric and spontaneous polarization effects confine a two-dimensional electron gas (2DEG), are presented. Well-defined emissions between the bulk excitonic transitions and their LO-phonon replica are attributed to spatially indirect excitons located close to the interface. The strong interfacial electric field separates photogenerated holes and electrons, weakening their Coulomb interaction and causing a blueshift with increasing excitation intensity due to carrier population effects. In addition, direct experimental proof is obtained by applying an electric field normal to the interface. An energy shift…
Energy transfer in diiodoBodipy-grafted upconversion nanohybrids.
2015
Steady-state and time-resolved emission studies on nanohybrids consisting of NaYF4:Yb,Er and a diiodo-substituted Bodipy (UCNP-IBDP) show that the Yb(3+) metastable state, formed after absorption of a near-infrared (NIR) photon, can decay via two competitive energy transfer processes: sensitization of IBDP after absorption of a second NIR photon and population of Er(3+) excited states.
Two-photon excitation microscopy of tryptophan-containing proteins.
2002
We have examined the feasibility of observing single protein molecules by means of their intrinsic tryptophan emission after two-photon excitation. A respiratory protein from spiders, the 24-meric hemocyanin, containing 148 tryptophans, was studied in its native state under almost in vivo conditions. In this specific case, the intensity of the tryptophan emission signals the oxygen load, allowing one to investigate molecular cooperativity. As a system with even higher tryptophan content, we also investigated latex spheres covered with the protein avidin, resulting in 340 tryptophans per sphere. The ratio of the fluorescence quantum efficiency to the bleaching efficiency was found to vary b…
RAPD evidence for a sister group relationship of the presumed progenitor-derivative species pairSenecio nebrodensis andS. viscosus (Asteraceae)
1998
The phylogenetic and phenetic analysis of 109 RAPD polymorphisms inS. nebrodensis, a perennial and self-incompatible endemic of four mountain ranges in Spain, andS. viscosus, a self-compatible annual widespread in Europe, as well asS. lividus, S. sylvaticus andS. vulgaris revealed a sister group relationship between the first two species. This result contrasts sharply with the earlier hypothesis based on isozyme variation thatS. viscosus originated from within a paraphyleticS. nebrodensis and that the two species represent a progenitor-derivative pair. After considering possible reasons for the sister group relationship found, including the possibility of rooting artefacts, it is concluded …