10 research outputs found
The Advertisement Calls and Distribution of Two Sympatric Species of Chiasmocleis (MĂ©hely 1904) (Anura, Microhylidae, Gastrophryninae) from the Atlantic Forest
The advertisement calls of Chiasmocleis cordeiroi and C. crucis are described for populations from the municipalities of IgrapiĂșna and Camacan, respectively, state of Bahia, Brazil. Both calls consist of multipulsed notes produced in series. Differences between the two calls are: dominant frequency, higher in C. cordeiroi (range 4500â4898 Hz; C. crucis range 4069â4435 Hz); note rate, higher in C. cordeiroi (range 6.20â7.46 s/note; C. crucis range 5.17â5.59 s/note); pulse rate, higher in C. cordeiroi (151.82â194.83 s/note; C. crucis range 125.30â 142.12 s/note); and the structure of the modulation patterns of the notes. Moreover, the advertisement calls of C. crucis and C. cordeiroi are more similar than the calls of all syntopic congeners. Furthermore, the current distribution of both species was extended
Whey Protein Isolate-Supplemented Beverage, Fermented by Lactobacillus casei BL23 and Propionibacterium freudenreichii 138, in the Prevention of Mucositis in Mice
Mucositis is a clinically important gastrointestinal inflammatory infirmity, generated by antineoplastic drugs cytotoxic effects. The inflammatory process caused by this disease frequently leads to derangements in the alimentary tract and great malaise for the patient. Novel strategies are necessary for its prevention or treatment, as currently available treatments of mucositis have several limitations in relieving its symptoms. In
this context, several research groups have investigated the use of probiotic bacteria, and in particular dairy bacterial strains. Compelling evidences reveal that milk fermented by certain probiotic bacteria has the capacity to ameliorate intestinal inflammatory disorders. In addition, innovative probiotic delivery strategies, based on probiotics incorporation into protective matrices, such as whey proteins, were able to increase the
therapeutic effect of probiotic strains by providing extra protection for bacteria against environmental stresses. Therefore, in this study, we evaluated the role of the whey protein isolate (WPI), when added to skim milk fermented by Lactobacillus casei BL23 (L. casei BL23) or by Propionibacterium freudenreichii CIRM-BIA138 (P. freudenreichii 138), as a protective matrix against in vitro stress challenges. In addition, we investigated
the therapeutic effect of these fermented beverages in a murine model of mucositis induced by 5-Fluorouracil (5-FU). Our results demonstrated that milk supplementation with 30% (w/v) of WPI increases the survival rate of both strains when challenged with acid, bile salts, high temperature and cold storage stresses, compared to fermented skim milk without the addition of WPI. Moreover, treatment with the probiotic beverages prevented weight loss and intestinal damages in mice receiving 5-FU. We conclude that the presence of WPI maximizes the anti-inflammatory effects of L. casei BL23, but not for P. freudenreichii 138, suggesting that whey protein enhancement of probiotic activity might be strain-dependent
PHYTOCHEMISTRY INVESTIGATION OF CASEARIA ARBOREA (RICH.) URB. (SALICACEAE) AND ANTIMICROBIAL ANALYSIS OF ITS DITERPENE
A phytochemical investigation from aerial parts of Casearia arborea (Rich.) Urb. (Salicaceae) led to isolation and identification of: sitosterol, 4-en-stigmast-3-one, 13-hydroxy-trans-ent-cleroda-3,14-diene,3-hydroxy-2-oxo-trans-ent-cleroda-3,14-diene (kolavelone), a mixture of 13-hydroxy-trans-ent-cleroda-3,14-diene and an ester ethyl hexadecanoate, kaempferol-3-O-a-L-arabinofuranoside and 4',5,7-trihydroxy-3',5'-dimethoxyflavone (tricin). The compounds have been described for the first time in this species. Five trihydroxy-flavone-hexoside derivatives have been identified by LC-ESI-HR-MS. The antimicrobial activity of kolavelone was evaluated against strains of Staphylococcus, Bacillus, Pseudomonas, Shigella and Candida spores, and its minimum inhibitory concentration (MIC) was determined. The results showed the antimicrobial activity of kolavelone against several bacteria and Candida tropicalis indicating its potential use as antimicrobial agent
PHYTOCHEMISTRY INVESTIGATION OF CASEARIA ARBOREA (RICH.) URB. (SALICACEAE) AND ANTIMICROBIAL ANALYSIS OF ITS DITERPENE
<div><p>A phytochemical investigation from aerial parts of Casearia arborea (Rich.) Urb. (Salicaceae) led to isolation and identification of: sitosterol, 4-en-stigmast-3-one, 13-hydroxy-trans-ent-cleroda-3,14-diene,3-hydroxy-2-oxo-trans-ent-cleroda-3,14-diene (kolavelone), a mixture of 13-hydroxy-trans-ent-cleroda-3,14-diene and an ester ethyl hexadecanoate, kaempferol-3-O-a-L-arabinofuranoside and 4',5,7-trihydroxy-3',5'-dimethoxyflavone (tricin). The compounds have been described for the first time in this species. Five trihydroxy-flavone-hexoside derivatives have been identified by LC-ESI-HR-MS. The antimicrobial activity of kolavelone was evaluated against strains of Staphylococcus, Bacillus, Pseudomonas, Shigella and Candida spores, and its minimum inhibitory concentration (MIC) was determined. The results showed the antimicrobial activity of kolavelone against several bacteria and Candida tropicalis indicating its potential use as antimicrobial agent.</p></div
CorrelaçÔes entre os elementos meteorolĂłgicos e as ocorrĂȘncias de incĂȘndios florestais na ĂĄrea urbana de Juiz de Fora, MG
Determinação do perĂodo mais propĂcio Ă s ocorrĂȘncias de incĂȘndios em vegetação na ĂĄrea urbana de Juiz de Fora, MG Determination of the most favorable period for the occurrences of vegetation fires in the urban area of Juiz de Fora, MG
Os incĂȘndios em vegetação podem provocar severos danos ao ambiente, alĂ©m de consequĂȘncias econĂŽmicas considerĂĄveis, como a destruição de hĂĄbitats, a queima de madeira e os custos para o seu combate. Para estabelecer polĂticas de controle e prevenção, faz-se necessĂĄrio conhecer o perfil dos incĂȘndios. As estatĂsticas de ocorrĂȘncia dos incĂȘndios em vegetação sĂŁo as principais ferramentas para se traçar seu perfil. Com esses dados, pode-se planejar o controle de modo mais eficiente, diminuindo gastos, tempo e riscos em seu combate. O objetivo deste estudo visou Ă determinação da Ă©poca do ano e horĂĄrio de maiores ocorrĂȘncias de incĂȘndios em vegetação no MunicĂpio de Juiz de Fora, MG. Para isso, foi utilizada uma sĂ©rie temporal de 10 anos (1995 -2004), com dados de ocorrĂȘncias de incĂȘndios e elementos climĂĄticos na ĂĄrea urbana do municĂpio. De acordo com os resultados, foi caracterizado o perĂodo de junho a outubro como a estação normal do fogo. Em relação Ă s horas do dia, o perĂodo das 10 Ă s 20 h foi o que concentrou o maior nĂșmero de ocorrĂȘncias, tendo seu pico entre 15 e 16 h.<br>Vegetation fires can provoke severe damage to the environment as well as considerable economic consequences, such as the destruction of habitats, the burning of wood and costs for combating them. To establish politics for control and prevention, it is necessary to know the profile of fire. The statistics of occurrence of vegetation fires are the main tools to draw your profile. With this data, we can plan to control them more efficiently by reducing costs, time and risk in their combat. The objective of this study seeks to determine the period of the year and schedule of larger occurrences of vegetation fires in the city of Juiz de Fora (MG). For that a 10 year temporary series was used (1995 - 2004) with data of occurrences of fires and climatic elements in the city. According to the results, the period from June to October as the normal fire season was characterized. Hourly, from 10:00 to 20:00 hours the largest number of occurrences was concentrated and peaks were between 15:00 and 16:00 h