87,140 research outputs found
Accurate first principles prediction of O-17 NMR parameters in SiO2: Assignment of the zeolite ferrierite spectrum
No full textO-17 NMR parameters, both the chemical shifts and the quadrupolar parameters, are calculated for SiO2 polymorphs using density functional theory with the generalized gradient-corrected PBE functional. The gauge including projector augmented wave (GIPAW) method (Pickard, C. J.; Mauri, F. Phys. Rev. B 2001, 63, 245101) ensures the reproduction of all electron results while using computationally efficient pseudopotentials. The use of plane-waves permits fully converged calculations to be performed on structures containing 144 atoms in the unit cell, without the need to resort to the cluster approximation. The calculated NMR parameters of cristobalite, quartz, coesite, and faujasite are in excellent agreement with experimental data. This demonstrates that density functional theory is able to reproduce with high accuracy the O-17 NMR parameters in SiO2 systems. This precision is used to assign the spectrum of the zeolite ferrierite. The data calculated for SiO2 are used to confirm that no simple correlation between the chemical shift and Cq NMR parameters and Si-O-Si angle exists, emphasizing the importance of predictive theories in this field
sj-pdf-1-cps-10.1177_00104140211047414 – Supplemental Material for Electoral Rules, Women’s Representation and the Qualification of Politicians
No full textSupplemental Material, sj-pdf-1-cps-10.1177_00104140211047414 for Electoral Rules, Women’s Representation and the Qualification of Politicians by Paola Profeta and Eleanor F. Woodhouse in Comparative Political Studies</p
Administration of influenza virus vaccine in the gluteal area and in deltoid muscle in the elderly
No full textImportanza e significato della ricerca degli anticorpi neutralizzanti e fissanti il complemento nella diagnosi di laboratorio della poliomielite. Indagini su 75 casi di poliomielite paralitica
No full textSarà inserito appena riaprirnno e biblioteh
Caratterizzazione antigenica dell'emoagglutinina e della neuraminidasi dei ceppi di virus influenzale di tipo B isolati in Italia nel 1962, 1967 e 1971.
No full textThe hemagglutinin and neuraminidase antigens of 3 influenza type B viruses isolated in Italy during the epidemics of 1962, 1967 and 1971 were characterized. As reference strains, the prototypes B/Lee/40, B/Bon/43, B/Johannesburg/58, B/Taiwan/62 and B/Hong Kong/8/73 were chosen. The data obtained with specific chicken antisera show that the hemagglutinins of the Italian strains have an immunological relation between themselves and with the hemagglutinating antigen of the B/Johannesburg and B/Taiwan viruses. Only in the case of B/Hong Kong/8/73 strain no cross reactivity with the earlier viruses was found. However the B/Hong Kong immune serum inhibited at low titer hemagglutinin of B/Taiwan virus. The neuraminidases of the Italian strains appear very similar and highly correlated with the enzymes of the B/Johannesburg and B/Taiwan viruses. Also the neuraminidase of B/Hong Kong is strictly related to that of previously prevalent viruses with the exception of the B/Lee and B/Bon. The behaviour of homologous and heterologous hemagglutination and neuraminidase inhibition antibody in the sera of patients (age over 10 years) involved in the three epidemics was studied. At the hemagglutination inhibition and neuraminidase inhibition tests the majority of the patient sera reacted also with the heterologous strains. It is concluded that the B influenza viruses belong to the same antigenic spectrum
Stato dell'immunità della popolazione milanese verso il nuovo ceppo di tipo B, B/Hong Kong/8/73 e studio del potere immunizzante del vaccino di vecchia composizione. Immunity status of the Milanese population towards B-Hong Kong-8-73, the new B type strain and study of the immunizing activity of the old composition vaccine
No full textIn view of the possibility that the new B Hong Kong strains which have a completely new hemoagglutinin would spread during the epidemic season, a serological survey was carried out on 180 serum samples collected between November and December 1972 in Milan from people aged 4 to over 60 yr. Because of limited data indicating that the neuraminidase of the new strains is antigenically related to that of earlier B strains, both hemagglutination inhibiting antibodies (HIA) and antineuraminidase antibodies (ANab) against the B/Hong Kong/8/773 strain were titrated. To gain information on the possibility that, lacking adequate aliquots of the new vaccine, some degree of protection could be conferred also by current vaccine preparations, both types of antibody were titrated in sera of children given a polyvalent vaccine including the strain B/Roma/67. The results indicated that HIA are almost absent in the Italian population since it was found only at low titers (1:10 - 1:20) in 12% of the sera, while ANab were present in 28 out of 57 sera examined and their level was over 1:20 in 25%. Judging from the behavior of the HIA, the response to the vaccine including the B Roma/67 strain was very poor. None of the 32 children developed antibody at titer >1:20. On the contrary ANab were found in 22 of the children (out of 25 examined) after a single dose of vaccine and all but one had ANab at titer >1:20 after the second dose. It is concluded that a certain degree of protection against the new B viruses could be afforded also by current vaccines
El profeta y el libro. [RESEÑA]
No full textUlrich BERGES, Isaías. El profeta y el libro, Estella: Verbo Divino («Estudios bíblicos», 44), 2011, 206 pp
Sexual Developmental Disorders in Pediatrics
No full textDisorders of sex development (DSD) are a heterogeneous group of pathologies that result in an alteration in sex determination or differentiation. DSD are estimated to affect 1: 4,500 newborns and according to the 2006 Chicago Consensus classification, DSD can be divided into three categories: those with a 46 XX karyotype, those with a 46 XY karyotype and those relating to sex chromosomes. It is crucial to correctly identify the pathology already in the first days of life to direct the patient and his family to the best path of care. For this reason, the role of the pediatrician is fundamental in the correct identification of the clinical picture and in supporting the family during the long process that involves the management of these patients. To make a diagnosis, it is necessary to follow a path led by a multidisciplinary team that includes several steps such as the execution of the genetic analysis, the evaluation with diagnostic imaging methods and laboratory evaluations. The therapeutic management, on the other hand, is still very complex even if in recent years we have moved from an attitude of early gender reassignment to an approach of watchful waiting to let the patient choose when she/he is mature enough to do so, which gender she/he feels to belong. It should not be forgotten that throughout this process the pediatrician must be both supportive and clinically active in the management of the child and his family
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