Electrical spin injection from an organic-based ferrimagnet in a hybrid organic/inorganic heterostructure

We report the successful extraction of spin polarized current from the organic-based room temperature ferrimagnetic semiconductor V[TCNE]x (x~2, TCNE: tetracyanoethylene; TC ~ 400 K, EG ~ 0.5 eV, s ~ 10-2 S/cm) and its subsequent injection into a GaAs/AlGaAs light-emitting diode (LED). The spin current tracks the magnetization of V[TCNE]x~2, is weakly temperature dependent, and exhibits heavy hole / light hole asymmetry. This result has implications for room temperature spintronics and the use of inorganic materials to probe spin physics in organic and molecular systems

Experimental procedures for precision measurements of the Casimir force with an Atomic Force Microscope

Experimental methods and procedures required for precision measurements of the Casimir force are presented. In particular, the best practices for obtaining stable cantilevers, calibration of the cantilever, correction of thermal and mechanical drift, measuring the contact separation, sphere radius and the roughness are discussed.Comment: 14 pages, 7 figure

Comportamento de cultivares de milho verde em ecossistema de várzea e 1 terra firme no Estado do Amazonas.

O trabalho objetivou avaliar o comportamento de oito cultivares de milho com características 11 para consumo no estádio verde de maturação e verificar a adaptabilidade aos ecossistemas de 12 terra firme e várzea nas condições edafoclimáticas dos municípios de Manaus e Iranduba no 13 Estado do Amazonas

Evidence for the Coexistence of Anisotropic Superconducting Gap and Nonlocal Effects in the Non-magnetic Superconductor LuNi2B2C

A study of the dependence of the heat capacity Cp(alpha) on field angle in LuNi2B2C reveals an anomalous disorder effect. For pure samples, Cp(alpha) exhibits a fourfold variation as the field H < Hc2 is rotated in the [001] plane, with minima along (alpha = 0). A slightly disordered sample, however, develops anomalous secondary minima along for H > 1 T, leading to an 8-fold pattern. The anomalous pattern is discussed in terms of coexisting superconducting gap anisotropy and non-local effects.Comment: 5 pages, 4 figure

Potencial produtivo de dois cultivares de tomate, plantados em sucessão ao milho, visando diminuir a incidência de Murcha Bacteriana.

Com a finalidade de indicação de inovações tecnológicas que possibilitem a produção desta hortaliça em grande escala, este trabalho objetiva avaliar o potencial produtivo e comercial de dois cultivares de tomate e técnicas de manejo visando diminuir a incidência de murcha bacteriana, em sistema de cultivo protegido, na região de Iranduba ? AM

Efeito da rotação de culturas sobre os índices produtivos de dois cultivares de tomate no município de Iranduba-AM.

O projeto visa avaliar o efeito da rotação de culturas sobre os índices produtivos de dois cultivares de tomate na redução da incidência de murcha bacteriana, na região de Iranduba - Amazonas

Sofosbuvir and Ribavirin Therapy for Children Aged 3 to &lt;12 Years With Hepatitis C Virus Genotype 2 or 3 Infection.

Currently, the only approved hepatitis C virus (HCV) treatment for children aged &lt;12 years is pegylated interferon plus ribavirin. In an open-label study, we evaluated the safety and efficacy of sofosbuvir plus ribavirin for 12 weeks in children aged 3 to &lt;12 years chronically infected with genotype 2 or for 24 weeks in patients with genotype 3. Patients aged 3 to &lt;6 years weighing &lt;17 kg received sofosbuvir 150 mg, and patients aged 3 to &lt;6 years weighing ≥17 kg and all patients aged 6 to &lt;12 years received sofosbuvir 200 mg once daily. Intensive pharmacokinetic sampling conducted in each age group confirmed the appropriateness of sofosbuvir doses. For all patients, ribavirin dosing was determined by baseline weight (up to 1,400 mg/day, two divided doses). The primary efficacy endpoint was sustained virologic response 12 weeks after therapy (SVR12). Fifty-four patients were enrolled (41 aged 6 to &lt;12 years and 13 aged 3 to &lt;6 years). Most were treatment naïve (98%) and infected perinatally (94%). All but one patient achieved SVR12 (53/54, 98%; 95% confidence interval, 90%-100%). The patient who did not achieve SVR12 was a 4-year-old who discontinued treatment after 3 days because of "abnormal drug taste." The most commonly reported adverse events in patients aged 6 to &lt;12 years were vomiting (32%) and headache (29%), and those in patients aged 3 to &lt;6 years were vomiting (46%) and diarrhea (39%). One 3-year-old patient had a serious adverse event of accidental ribavirin overdose requiring hospitalization for monitoring; this patient completed treatment and achieved SVR12. Conclusion: Sofosbuvir plus ribavirin was well tolerated and highly effective in children aged 3 to &lt;12 years with chronic HCV genotype 2 or 3 infection

Paramagnetic effect in YBaCuO grain boundary junctions

A detailed investigation of the magnetic response of YBaCuO grain boundary Josephson junctions has been carried out using both radio-frequency measurements and Scanning SQUID Microscopy. In a nominally zero-field-cooled regime we observed a paramagnetic response at low external fields for 45 degree asymmetric grain boundaries. We argue that the observed phenomenology results from the d-wave order parameter symmetry and depends on Andreev bound states.Comment: To be published in Phys. Rev.

Discriminating early-stage diabetic retinopathy with subjective and objective perimetry

Introduction: To prevent progression of early-stage diabetic retinopathy, we need functional tests that can distinguish multiple levels of neural damage before classical vasculopathy. To that end, we compared multifocal pupillographic objective perimetry (mfPOP), and two types of subjective automated perimetry (SAP), in persons with type 2 diabetes (PwT2D) with either no retinopathy (noDR) or mild to-moderate non-proliferative retinopathy (mmDR). Methods: Both eyes were assessed by two mfPOP test methods that present stimuli within either the central ±15° (OFA15) or ±30° (OFA30), each producing per-region sensitivities and response delays. The SAP tests were 24-2 Short Wavelength Automated Perimetry and 24-2 Matrix perimetry. Results: Five of eight mfPOP global indices were significantly different between noDR and mmDR eyes, but none of the equivalent measures differed for SAP. Per-region mfPOP identified significant hypersensitivity and longer delays in the peripheral visual field, verifying earlier findings. Diagnostic power for discrimination of noDR vs. mmDR, and normal controls vs. PwT2D, was much higher for mfPOP than SAP. The mfPOP per-region delays provided the best discrimination. The presence of localized rather than global changes in delay ruled out iris neuropathy as a major factor. Discussion: mfPOP response delays may provide new surrogate endpoints for studies of interventions for early-stage diabetic eye damage.</p

Avaliação da incidência de Murcha Bacteriana em tomateiro sob cultivo protegido no Município de Iranduba-AM.

Este trabalho objetiva avaliar a incidência de murcha bacteriana em tomateiro plantado sucessivamente, em sistema de cultivo protegido, na região de Iranduba ? AM