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Anderson Santos Souza,Marcos Almeida Bezerra,Uillian Mozart Ferreira Mata Cerqueira,Caiene Jesus Oliveira Rodrigues,Bianca Cotrim Santos,Cleber Galvão Novaes,Erica Raina Venâncio Almeida 한국식품과학회 2024 Food Science and Biotechnology Vol.33 No.6
Principal component analysis (PCA) is currently one of the most used multivariate data analysis techniques for evaluating information from food analysis. In this review, a brief introduction to the theoretical principles that underlie PCA will be given, in addition to presenting the most commonly used computer programs. An example from the literature was discussed to illustrate the use of this chemometric tool and interpretation of graphs and parameters obtained. A list of recently published articles will also be presented, in order to show the applicability and potential of the technique in the food analysis field.
Albuquerque Francieli Marcelino dos Santos,de Almeida Welton Aaron,Ferreira Elaine Cristina Batista,do Nascimento Deividy Vicente,Nova Isabella Coimbra Vila,Cruz Glaucilane dos Santos,Teixeira Alvaro 한국응용곤충학회 2023 Journal of Asia-Pacific Entomology Vol.26 No.4
The fall armyworm Spodoptera frugiperda (Lepidoptera: Noctuidae) is a polyphagous insect whose control mainly involves the use of synthetic insecticides that can be highly toxic to non-target organisms and lead to the se lection of resistant populations. This work reports the effects of the saline extract of Opuntia ficus-indica cladodes (CE) on the feeding survival and midgut morphophysiology of S. frugiperda third instar caterpillars. CE exerted a phagostimulant effect to the caterpillars but was not able to kill them. Despite of this, the midguts of caterpillars treated with CE (12.8 mg/g) showed intense disorganization of epithelium, vacuolation of the cytoplasm of columnar cells and increased size of goblet cells, as well as absence of the peritrophic membrane. The caterpillars treated with CE showed a reduction in the amount of neutral polysaccharides and protein content at the midgut epithelial cells. Together these data may indicate that the ingestion of CE in higher concentrations or by a longer period would lead the caterpillars to death or to damage in development. In conclusion, CE ingestion resulted in damage to the midgut morphology of caterpillars, with a reduction in carbohydrate and protein content.
The State-of-Play of Anomalous Microwave Emission (AME) research
Dickinson, Clive,Ali-Haï,moud, Y.,Barr, A.,Battistelli, E.S.,Bell, A.,Bernstein, L.,Casassus, S.,Cleary, K.,Draine, B.T.,Gé,nova-Santos, R.,Harper, S.E.,Hensley, B.,Hill-Valler, J.,Hoang, Th Elsevier 2018 New astronomy reviews Vol.80 No.-
<P><B>Abstract</B></P> <P>Anomalous Microwave Emission (AME) is a component of diffuse Galactic radiation observed at frequencies in the range ≈ 10–60 GHz. AME was first detected in 1996 and recognised as an additional component of emission in 1997. Since then, AME has been observed by a range of experiments and in a variety of environments. AME is spatially correlated with far-IR thermal dust emission but cannot be explained by synchrotron or free–free emission mechanisms, and is far in excess of the emission contributed by thermal dust emission with the power-law opacity consistent with the observed emission at sub-mm wavelengths. Polarization observations have shown that AME is very weakly polarized ( ≲ 1 %). The most natural explanation for AME is rotational emission from ultra-small dust grains (“spinning dust”), first postulated in 1957. Magnetic dipole radiation from thermal fluctuations in the magnetization of magnetic grain materials may also be contributing to the AME, particularly at higher frequencies ( ≳ 50 GHz). AME is also an important foreground for Cosmic Microwave Background analyses. This paper presents a review and the current state-of-play in AME research, which was discussed in an AME workshop held at ESTEC, The Netherlands, June 2016.</P>