Surface degradation of glass ceramics after exposure to acidulated phosphate fluoride

OBJECTIVE: This study evaluated the surface degradation effect of acidulated phosphate fluoride (APF) gel exposure on the glassy matrix ceramics as a function of time. MATERIAL AND METHODS: Disc-shaped ceramic specimens (N = 120, 10/per ceramic material) were prepared in stainless steel molds (inner diameter: 5 mm, height: 2 mm) using 6 dental ceramics: 3 indicated for ceramic-fused-to-metal (Vita Omega 900, Carmen and Vita Titankeramik), 2 for all-ceramic (Vitadur Alpha and Finesse® Low Fusing) and 1 for both types of restorations (IPS d.SIGN). The specimens were wet ground finished, ultrasonically cleaned and auto-glazed. All specimens were subjected to calculation of percentage of mass loss, surface roughness analysis and topographical description by scanning electron microscopy (SEM) before (0 min) and after exposure to 1.23 % APF gel for 4 min and 60 min representing short- and long-term etching effect, respectively. The data were analyzed using two-way ANOVA with repeated measures and Tukey's test (a=0.05). RESULTS: Significant effect of the type of the ceramics (p=0.0000, p=0.0031) and exposure time (p=0.0000) was observed in both surface roughness and percentage of mass loss values, respectively. The interaction factor between both parameters was also significant for both parameters (p=0.0904, p=0.0258). Both 4 min (0.44±0.1 - 0.81±0.2 mm) and 60 min (0.66±0.1 - 1.04±0.3 mm) APF gel exposure created significantly more surface roughness for all groups when compared to the control groups (0.33±0.2 - 0.68±0.2 mm) (p;0.05) but at 60 min exposure, IPS d.SIGN showed the highest percentage of mass loss (0.1151±0.11). The mean surface roughness for Vita Titankeramik (0.84±0.2 mm) and Finesse® Low Fusing (0.74.±0.2 mm) was significantly higher than those of the other ceramics (0.59±0.1 mm - 0.49±0.1 mm) and Vita Titankeramik (

Feeding strategies for small-scale rearing black soldier fly larvae (Hermetia illucens) as organic waste recycler.

Processing organic waste using black soldier fly (BSF)-based technology offers a promising alternative for sustainable organic waste management and urban sanitation. This study was conducted to assess the influence of feeding strategies on the efficacy of BSF larvae to recycle organic wastes into value products

Production and valorization of maggot meal: sustainable source of proteins for indigenous chicks.

The feed industry needs new sources of highly digestible protein to substitute other valuable limited protein sources of animal origin such as fishmeal in animal feed. The aim of this study was to exploit the potential of the housefly larvae (maggots) in production of a low-cost, high-quality protein source to supplement feeds for poultry farmers

Efeito do uso de farinha de feijão-caupi no desenvolvimento e reprodução de Tenebrio molitor (L.) (Coleoptera: Tenebrionidae).

O tenébrio (Tenebrio molitor) vem sendo muito utilizado como uma alternativa de alimento vivo para animais como peixes e aves, pois é uma excelente fonte proteica. Considerando o valor nutritivo do feijão-caupi e seu baixo custo de produção, objetivou-se com este trabalho avaliar a viabilidade de inserção da farinha de feijão-caupi na dieta de T. molitor

Perfil de agentes de inovação social: proposta metodológica para o segmento da agricultura familiar.

Esta pesquisa delineou o perfil de atuação profissional do ‘agente de inovação social’ na Embrapa.Fourth-Generation Knowledge Districts 2024. FGKD24

Perfil de agentes de inovação social: proposta metodológica para o segmento da agricultura familiar.

Esta pesquisa delineou o perfil de atuação profissional do ‘agente de inovação social’ na Embrapa. Esta definição fortalece as ações de inovação social na Empresa e nas instituições parceiras estabelecendo os principais papéis a serem exercidos para promover o desenvolvimento socioeconômico no contexto da agricultura familiar. A pesquisa adotou a abordagem qualitativa do tipo revisão bibliográfica. Concluiu-se que o exercício da função de agente de inovação social é abrangente e envolve uma gama de atribuições que se complementam e se inter-relacionam. Identificou-se três categorias de papéis, consideradas essenciais para compor o perfil profissional desta função, sendo elas: articulação, facilitação e gestão. O exercício desses papéis prescinde do desenvolvimento/aquisição de conhecimentos técnicos especializados e procedimentais (habilidades) que são a base para o desenvolvimento dos papéis/competências devendo ser a Embrapa a protagonista na formação destes agentes para o fortalecimento do ecossistema de Inovação na agricultura familiar.Publicado também em: Blucher Social Sciences Proceedings, v. 7, n. 1, p. 329-343, maio 2024. Trabalho apresentado no Congresso Distritos do Conhecimento de Quarta Geração/Fourth-Generation Knowledge Districts, Campinas, 2024. FGKD24

Genetic Analyses of Heme Oxygenase 1 (HMOX1) in Different Forms of Pancreatitis

Contains fulltext : 107993.pdf (publisher's version ) (Open Access)BACKGROUND: Heme oxygenase 1 (HMOX1) is the rate limiting enzyme in heme degradation and a key regulator of inflammatory processes. In animal models the course of pancreatitis was ameliorated by up-regulation of HMOX1 expression. Additionally, carbon monoxide released during heme breakdown inhibited proliferation of pancreatic stellate cells and might thereby prevent the development of chronic pancreatitis (CP). Transcription of HMOX1 in humans is influenced by a GT-repeat located in the promoter. As such, HMOX1 variants might be of importance in the pathogenesis of pancreatitis. METHODS: The GT-repeat and SNP rs2071746 were investigated with fluorescence labelled primers and by melting curve analysis in 285 patients with acute pancreatitis, 208 patients with alcoholic CP, 207 patients with idiopathic/hereditary CP, 147 patients with alcoholic liver cirrhosis, and in 289 controls, respectively. GT-repeat analysis was extended to a total of 446 alcoholic CP patients. In addition, we performed DNA sequencing in 145 patients with alcoholic CP, 138 patients with idiopathic/hereditary CP, 147 patients with alcoholic liver cirrhosis, and 151 controls. Exon 3 screening was extended to additional patients and controls. RESULTS: S- and L-alleles of the GT-repeat, genotypes and alleles of SNP rs2071746 and non-synonymous variants detected by sequencing were found with similar frequencies in all groups. CONCLUSIONS: Although functional data implicate a potential influence of HMOX1 variants on the pathogenesis of pancreatitis, we did not find any association. As rare non-synonymous HMOX1 variants were found in patients and controls, it is rather unlikely that they will have functional consequences essential for pancreatitis development