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- 저자 : Rodrigo Almeida (검색결과 4 건)
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Rodrigo de Almeida Vaucher,Janice Luehring Giongo,Leandro Perger Bolzan,Marcos Saldanha Côrrea,Viviane Pedroso Fausto,Camilla Filippi dos Santos Alves,Leonardo Quintana Soares Lopes,Aline Augusti Boli 한국응용곤충학회 2015 Journal of Asia-Pacific Entomology Vol.18 No.2
Antimicrobial activity of Amazonian oils Andiroba and Copaiba against Paenibacillus larvae has been recently determined, indicating their potential use for the control of American Foulbrood Disease (AFB), but the use of essential oils in the environment still represents a challenge. The oils present several volatile elements in its composition, such high volatility being the cause of a sharp decline in antimicrobial activity. In this context the nanostructuration of these amazon oils may decrease the volatile characteristic of such products. The following research aimed to evaluate the activity of nanoemulsions prepared with Andiroba and Copaiba oils against Paenibacillus species. The toxicity of nanoemulsions has also been investigated with larvae and adult worker bees. Nanoemulsions (NE1, 10% Andiroba oil; NE2, 10% Copaiba oil; and NE3, 10% medium-chain triglyceride as negative control) were prepared in a high pressure homogenizer. The particle sizes were determined as 192, 211, and 178 nm for NE1, NE2, and NE3, respectively. The z potential values were −56.4, −47.1, and −27.2, respectively. NE1 and NE2 showed minimal inhibitory concentration (MIC) values lower than 0.39% for most Paenibacillus species tested. None of the strains were inhibited by negative control NE3. The timeresponse effect of the nanoemulsions has been tested on P. larvae ATCC9545, resulting in a decrease in the number of viable cells to less than 1 log CFU/ml for NE1. The nanoemulsion NE1 showed a significant toxic effect for the larvae (26% mortality) when compared with NE2 (13%) and NE3 (7%). The toxic effect of nanoemulsions has also been evaluated for 72 h in adult worker bees and low mortality rate was only observed for the NE1 treatment (8.3%). This study shows for the first time that nanoemulsions of Copaiba oil can be a potential candidate for the treatment or prevention of AFB.
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João Valente,Rodrigo Almeida,Lammert Kooistra 한국원예학회 2021 Horticulture, Environment, and Biotechnology Vol.62 No.2
Apples emit a volatile organic compounds during the ripening process named ethylene, which can be used to infer the optimalharvest time. Currently, the fruit ethylene emission is assessed in controlled facilities, thus laborious and expensive. Thisarticle pioneers the study of assessing ethylene emissions in uncontrolled environments. However, understanding how theethylene spatial temporal dynamics in an open fi eld, its still elusive. Therefore, this paper provides a model from an ( Malusdomestica Borkh) apple orchard for simulation and analysis of ethylene behaviour. We demonstrate that the model is able toexplain the ethylene emissions behaviour in an orchard fi eld when subject to diff erent wind speeds, directions and ripenessstages. Based on that we have investigated diff erent sampling schemes—regular and random—for capturing the variabilityof ethylene in an orchard using an electrochemical gas sensor. These results show that a random sampling scheme performs25% better than an equivalent regular-defi ned grid. Moreover, the measurements acquired locally in the rows tend to be 10%more reliable than in other locations from the orchard. Finally, the ethylene variability can be assessed with a confi dence of75% using 4 and 16 sampling points.
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Mairim Russo Serafini,Rodrigo Correia Santos,Adriana Gibara Guimarães,João Paulo Almeida dos Santos,Alan Diego da Conceicão Santos,Izabel Almeida Alves,Daniel Pens Gelain,Paulo Cesar de Lima Nogueira 한국식품영양과학회 2011 Journal of medicinal food Vol.14 No.10
Herbal drugs have been used since ancient times to treat a wide range of diseases. Morinda citrifolia Linn (popularly known as “Noni”) has been used in folk medicine by Polynesians for over 2,000 years. It is reported to have a broad range of therapeutic effects, including effects against headache, fever, arthritis, gingivitis, respiratory disorders, infections, tuberculosis, and diabetes. The aim of this study was to investigate the antioxidant, anti-inflammatory, antinociceptive, and antibacterial properties of the aqueous extract from M. citrifolia leaves (AEMC). Antioxidant activity was observed against lipid peroxidation, nitric oxide, and hydroxyl radicals. The antinociceptive effect of AEMC was observed in the acetic acid–induced writhing test at the higher dose. Moreover, AEMC significantly reduced the leukocyte migration in doses of 200 and 400 mg/kg and showed mild antibacterial activity. Together, the results suggest that properties of M. citrifolia leaf extract should be explored further in order to achieve newer tools for managing painful and inflammation conditions, including those related to oxidant states.
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Carcass Characteristics and Qualitative Attributes of Pork from Immunocastrated Animals
Caldara, Fabiana Ribeiro,Moi, Marta,Santos, Luan Sousa Dos,Paz, Ibiara Correia De Lima Almeida,Garcia, Rodrigo Garofallo,Naas, Irenilza De Alencar,Fernandes, Alexandre Rodrigo Mendes Asian Australasian Association of Animal Productio 2013 Animal Bioscience Vol.26 No.11
An investigation was carried out to assess the carcass characteristics and meat quality aspects of immunocastrated male pigs of medium genetic potential for lean meat deposition in carcass (53 to 55%). When the crossbred Large White x Landrace pigs (n = 45) were 70 days old, they were distributed in a totally randomized design in three treatments (castrated males, females and immunocastrated males) with three replicates of five animals. The pigs were slaughtered when they were 140 days old. Carcass temperature and pH were recorded twice, at 45 min and 24 h after slaughter. The carcasses were evaluated for hot and cold carcass yield, commercial cuts yield, length and depth, back fat thickness, loin eye area and lean meat percentage. The Longissimus dorsi muscle was extracted for analysis of color ($L^*$, $a^*$, $b^*$), exudate loss, cooking loss and centesimal and sensorial analysis of the meat. There were no significant differences for the evaluated parameters between castrated males, immunocastrated males and females, except for backfat thickness between the 7th and 8th thoracic vertebra and the point P2 (lower for immunocastrated males) and carcass temperature at 45 min post slaughter (higher in immunocastrated males), however, this did not interfer with the rate of pH decrease post mortem and the meat quality. The results from this research did not indicate a benefit of immunocastration on carcass characteristics of pigs of medium genetic potential for lean meat deposition in carcass, when compared to surgical castration.
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