White Light
Mostrando 1-12 de 574 artigos, teses e dissertações.
-
1. The Relationship between Contralateral Suppression of Transient Evoked Otoacoustic Emission and Unmasking of Speech Evoked Auditory Brainstem Response
Abstract Introduction Several studies have shown that efferent pathways of the auditory system improve perception of speech-in-noise. But, the majority of investigations assessing the role of efferent pathways on speech perception have used contralateral suppression of otoacoustic emissions as a measure of efferent activity. By studying the effect of effere
International Archives of Otorhinolaryngology. Publicado em: 2022
-
2. Thermal, structural and optical properties of magnetic BiFeO3 micron-particles synthesized by coprecipitation method: heterogeneous photocatalysis study under white LED irradiation
Abstract Bismuth ferrite, BiFeO3 (BFO) prepared via a coprecipitation method, was used as an effective photocatalyst for the degradation of methylene blue (MB) using a white light-emitting diode (LED-50 W) lamp. The as-prepared material was characterized by TGA, XRD, SEM-EDX, FTIR, and UV-vis-DRS techniques. The effects of experimental key parameters such as
Cerâmica. Publicado em: 2022
-
3. Green Synthesis of Upconverting NaYF4 and NaGdF4 Materials and Energy Levels Determination
An alternative green route using a domestic microwave oven to synthesize NaGdF4:Yb,Tm and NaYF4:Yb,Er was successfully developed. Decreasing dopants concentration increased the β-NaREF4/α-NaREF4 ratio in NaGdF4. The scanning electron microscopy (SEM) images of NaGdF4 showed particles ranging from 500 nm to 1 μm with formation of aggregates up to 100 μm,
J. Braz. Chem. Soc.. Publicado em: 2021-08
-
4. PhotoMetrix UVC: A New Smartphone-Based Device for Digital Image Colorimetric Analysis Using PLS Regression
A novel free PhotoMetrix UVC is proposed for both the operation of a universal serial bus video camera (UVC) and multivariate image analysis, allowing a full solution for point-of-use analysis. A UVC was placed in an open-source 3D-printed chamber illuminated by a white light-emitting diode (LED) with controlled intensity of light. The digital images capture
J. Braz. Chem. Soc.. Publicado em: 2021-03
-
5. Rosettes in T-cell pseudolymphoma: a new dermoscopic finding,
Abstract Rosettes are small white structures visible with polarized light dermoscopy, whose exact morphological correlation is not yet defined. These small shiny structures are found in several conditions such as scarring, dermatofibroma, molluscum contagiosum, squamous cell carcinoma, basal cell carcinoma, melanoma, melanocytic nevus, discoid lupus erythema
An. Bras. Dermatol.. Publicado em: 2021-02
-
6. Caracterização morfofisiológica de folhas e inflorescências de variedades comerciais de minicrisântemo
Resumo O crisântemo faz parte do conjunto de plantas mais antigas a serem cultivadas pelo homem, possuindo grande área de produção de flores no Brasil. Diante de sua importância econômica e uso em melhoramento genético, o presente trabalho tem como objetivo caracterizar variedades de minicrisântemos, com ênfase em parâmetros morfológicos e fisiol�
Ornam. Hortic.. Publicado em: 2020-06
-
7. Effects of bagging or the combination of umbrella and bag treatments on anthocyanin accumulation in the berry skin of ‘Kyoho’ (Vitis labruscana) Grape
Abstract The object of this study was to investigate the influence of bagging or the combination of umbrella and bags on berry composition, especially anthocyanin accumulation, in ‘Kyoho’ (V. labruscana) berry skins. Five different colors and bag materials commonly used in production were chosen for this study: white, green, yellow, nonwoven and transpar
Food Sci. Technol. Publicado em: 2020-06
-
8. Effect of Photoperiod on the Egg Production, Plasma Luteinizing Hormone, Follicle-Stimulating Hormone, Gonadal Hormones, and Mrna Levels of Lh and Fsh in the Hypothalamic-Pituitary-Gonadal Axis of Pigeons
ABSTRACT We investigated the egg production, changes in luteinizing hormone (LH), follicle-stimulating hormone (FSH), gonadal hormones, and their mRNA levels in the hypothalamic-pituitary-gonadal axis of White King pigeons submitted to different photoperiods. The treatments consisted of three photoperiods (8 h light (L):16 h dark (D), 12L:12D, and 16L:8D), w
Braz. J. Poult. Sci.. Publicado em: 20/12/2019
-
9. O GUARDA-CHUVA VERMELHO: EXPERIÊNCIA CROMÁTICA NA OBRA DE OSWALDO GOELDI ENTRE 1937 E 1957
Resumo A simplificação formal, na obra de Oswaldo Goeldi, se caracteriza por explorar o contraste entre a luz branca do fundo e o negro opaco da forma impressa. A pobreza é a condição existencial do expressionista exilado, vivenciada em vários níveis: a ruína da experiência tradicional, a identificação com os excluídos e, finalmente, a forma pobr
Rev. Hist. (São Paulo). Publicado em: 09/12/2019
-
10. Aplicações da arqueometria no mobiliário de São Paulo do século XVIII: análises indiciárias e contextualização histórica
RESUMO Neste artigo, são apresentados os resultados dos exames arqueométricos de Física aplicada sobre duas peças de mobiliário do acervo do Museu Paulista, uma arca-cofre e uma cadeira de couro de sola feitas por volta do século XVIII. As técnicas de análise utilizadas foram o ED-XRF e o imageamento com fluorescência de luz ultravioleta. As anális
An. mus. paul.. Publicado em: 05/12/2019
-
11. White sand vegetation in an Amazonian lowland under the perspective of a young geological history
Abstract: What controls the formation of patchy substrates of white sand vegetation in the Amazonian lowlands is still unclear. This research integrated the geological history and plant inventories of a white sand vegetation patch confined to one large fan-shaped sandy substrate of northern Amazonia, which is related to a megafan environment. We examined flo
An. Acad. Bras. Ciênc.. Publicado em: 02/12/2019
-
12. Germinação e vigor de sementes de Caesalpinia ferrea Mart. ex. Tul. var. ferrea submetidas a diferentes regimes de luz e temperaturas
Resumo Caesalpinia ferrea Mart.ex.Tul. var. ferrea é uma arbórea da família Fabaceae recomendada na ornamentação de parques, praças, jardins centrais de avenidas, vias públicas e estacionamentos. Nesse sentido, o objetivo desse trabalho foi avaliar a germinação e o vigor de suas sementes quando submetidas a diferentes condições de luz e temperatur
Ciênc. Florest.. Publicado em: 02/12/2019