Sodium hydroxide or urea pretreatment of acerola (Malpighia emarginata) fruit residue increases dry matter degradability and reduces methane production in in vitro rumen fermentation     

Moura  Lais Micaelle Lopes  da Silva Pereira  Flávia Denise  de Lima  Patrícia Rodrigues  Nascimento  Júlio Cesar Silva  dos Santos de Oliveira  Andresca  de Souza Rodrigues  Rafael Torres  Ferreira  Clébio Pereira  Moraes  Salete Alves  Queiroz  Mário Adriano Ávila  Menezes  Daniel Ribeiro 《Tropical animal health and production》2020,52(5):2433-2441

Tropical Animal Health and Production - The aim of this study was to evaluate the effect of adding different concentrations of either urea or NaOH in dehydrated acerola (Malpighia emarginata) fruit...  相似文献   

INFLUENCE OF NITROGEN FERTILIZATION ON NICKEL ACCUMULATION AND CHEMICAL COMPOSITION OF COFFEE PLANTS DURING FRUIT DEVELOPMENT     

Andre Rodrigues dos Reis  Jose Laercio Favarin  Luiz Antonio Gallo  Milton Ferreira Moraes  Tiago Tezotto  Dr Jose Lavres Junior 《Journal of plant nutrition》2013,36(12):1853-1866

Nutritional and physiological significance of micronutrients in coffee plants, especially with regard to nickel (Ni) is still unknown. The dynamics of nitrogen (N), phosphorus (P), potassium (K) and Ni accumulation in coffee fruits, as well as their relationships with total soluble protein, amino acids, reducing sugars, and starch content during coffee fruit development (green, ripe, and dry fruits), were investigated. Coffee trees received three N fertilizer rates (0, 150, and 300 kg of N ha^?1) as ammonium sulfate split into three applications per year. Nitrogen fertilization increased reducing sugars and starch concentrations in ripe fruits. In contrast, green fruits showed the highest amino acid and Ni concentrations. Fruit Ni concentration decreased in both green and ripe fruits as N rates increased; thus, indicating the possibility of either a N-associated dilution effect on Ni concentration or that Ni uptake by roots and/or transport to developing fruit was limiting. Plant nutritional status and fruit development stage influenced the coffee grain chemical composition. Furthermore, the variation in reducing sugars and starch content was more closely linked to the stage of fruit development than to N supply. A supposed relationship among the decreased of caffeine, starch, amino acids, and proteins with Ni content during green fruit development suggests a fundamental role for Ni in coffee fruit ripening. The interaction between N and Ni metabolism during fruit ripening might influence the chemical parameters involved in the coffee grain quality. This is the first report documenting changes in Ni concentrations of coffee fruit as a function of N fertilization rates and the development stage, but further research is needed to better understand the significance of N-Ni interaction in developing coffee fruit.  相似文献   

Neural networks in climate spatialization and their application in the agricultural zoning of climate risk for sunflower in different sowing dates     

Lucas Eduardo de Oliveira Aparecido  José Reinaldo da Silva Cabral de Moraes  Glauco de Souza Rolim  Lucieta Guerreiro Martorano  Kamila Cunha de Meneses  Taynara Tuany Borges Valeriano 《Archives of Agronomy and Soil Science》2013,59(11):1477-1492

ABSTRACT

Sunflower is a species that is sensitive to local climate conditions. However, studies that use artificial neural networks (ANNs) to evaluate this influence and create tools such as agricultural zoning of climate risk (ZARC) have not been conducted for this species. Due to the importance of sunflower as a human food source and for biodiesel production, and also the necessity of conducting research to evaluate the suitability of this oleaginous species under different climatic conditions. Thus, we seek to construct a ZARC for sunflower in Brazil simulating sowing on different dates and using meteorological elements spatialized by ANNs. Climate data were used: air temperature (T), rainfall (P), relative air humidity (UR), solar radiation (MJ_m^?2_d^?1) and wind velocity (U²). Climatic regions considered suitable for the cultivation of sunflower had average annual values for T between 20 and 28°C, P between 500 and 1.500 mm per cycle, and soil water deficit (DEF) below 140 mm per cycle. A neural network is an efficient tool that can be used in spatialization of climate variables quickly and accurately. Sunflower sowing in the spring and summer are the ones that provide the largest suitable areas in southeastern Brazil, with 58.13 and 64.36% of suitable areas, respectively.  相似文献   

Diverse phytoplasmas associated with maize bushy stunt disease in Peru     

Gamarra  Delia Gamarra  Villar  Charo Milagros  Suarez  Gilberto Torres  Esteban  Walter Darlyn Ingaruca  Contaldo  Nicoletta  Lozano  Emerson Clovis Carrasco  Bertaccini  Assunta 《European journal of plant pathology / European Foundation for Plant Pathology》2022,163(1):223-235

European Journal of Plant Pathology - Corn plants showing symptoms of midribs chlorosis, and leaf reddening, short internodes, ear proliferation, and plant growth reduction were collected in Peru...  相似文献   

Toxicological and metabolic parameters of the teleost fish (Leporinus obtusidens) in response to commercial herbicides containing clomazone and propanil     

Bibiana Silveira Moraes  Alexandra Pretto  Charlene Menezes  Geovane Boschmann Reimche 《Pesticide biochemistry and physiology》2009,95(2):57-62

Pesticides, such as herbicides can affect the metabolic and toxicological parameters on fish. For this reason, an experiment was carried out with the objective of to evaluate the effects of commercial formulations of clomazone and propanil herbicides on acetylcholinesterase (AChE), thiobarbituric acid-reactive substances (TBARS), catalase (CAT) and metabolic parameters in teleost fish (Leporinus obtusidens). Fish were exposed during 90 days to field measured concentration of the herbicides clomazone and propanil (376 and 1644 μg/L, respectively) on rice paddy water. Specific AChE activity in the brain and muscle decreased and TBARS levels decreased in brain, muscle and liver tissues. Liver catalase decreased after exposure to both herbicides. Metabolic parameters in the liver and white muscle showed different changes after exposure to both herbicides. In summary, the results showed that clomazone and propanil affects toxicological and metabolic parameters of piavas. These results suggest that environmentally relevant herbicides concentrations are toxic to Leporinus obtusidens.  相似文献   

Antioxidant Capacity and Antimutagenic Activity of Natural Oleoresin from Greenhouse Grown Tomatoes (<Emphasis Type="Italic">Lycopersicon esculentum</Emphasis>)     

Eustolia Rodríguez-Muñoz  Gilberto Herrera-Ruiz  Gustavo Pedraza-Aboytes  Guadalupe Loarca-Piña 《Plant foods for human nutrition (Dordrecht, Netherlands)》2009,64(1):46-51

Natural oleoresins rich in lycopene were obtained from two varieties of tomato (Zedona and Gironda) and their nutraceutical potential (antioxidant and antimutagenic capacity) was evaluated. Both oleoresins had a high content of lycopene, 58.33 ± 1.67 mg/g (Zedona) and 63.97 ± 0.80 mg/g (Gironda). The antioxidant activity (AA) of the oleoresins by β-carotene method were 56.4–74.5% (Zedona) and 51–72.8% (Gironda), while when using the free radical stable 2,2-diphenyl-picryl-hydrazyl (DPPH) method, the antiradical activity (ARA) was determined to be 18.2–32.7% (Zedona) and 16.6–26.7% (Gironda) for the concentrations tested that of 200–400 μM equivalents of lycopene. The antimutagenic activity of the oleoresins was tested against aflatoxin B₁ (AFB₁) using the microsuspension assay, both varieties had a very high antimutagenic potential against AFB₁ (60–66%).These results suggest the NCRT can be taken advantage to obtaining rich oleoresin in lycopene with a nutraceutical value.  相似文献   

Molecular markers in the LEP gene and reproductive performance of beef cattle     

S. E. M. Almeida  E. A. Almeida  J. C. F. Moraes  T. A. Weimer 《Zeitschrift für Tierzüchtung und Züchtungsbiologie》2003,120(2):106-113

  相似文献   

Different levels of selenomethionine on the meat quality and selenium deposition in tissue of finishing pigs     

Vanessa Avelar Silva  Antnio Gilberto Bertechini  Alisson Hlio Sampaio Clemente  Luis Filipe Villas Boas de Freitas  Bernardo Rocha Franco Nogueira  Barbara Lopes de Oliveira  Alcinia de Lemos Souza Ramos 《Journal of animal physiology and animal nutrition》2019,103(6):1866-1874

The aim of the study was to verify the influence of selenomethionine (SM) supplementation on performance, carcass yield, characteristics of meat quality and Se tissue deposition of finishing pigs. A total of 128 hybrid pigs with an average weight of 76 kg were distributed in randomized blocks according to body weight in eight treatments and eight replicates. The experimental treatments were two Se levels from sodium selenite‐SS (0.3 and 0.6 ppm), four Se levels from SM (0.3, 0.4, 0.5 and 0.6 ppm) and two combinations of SS with SM (SS 0.15 + SM 0.15 ppm and SS 0.3 + SM 0.3 ppm) providing 0.3 and 0.6 ppm Se in the diet respectively. The feeds were based on corn and soya bean meal. After 30 days on test, were analysed the performance indices and the pigs were slaughtered at commercial slaughterhouse. The cold carcass yield, the physicochemical characteristics of the loin meat and the Se content in muscle and liver were evaluated. There was no significant difference in performance indices (p > .05); however, there was a linear effect on the increase in pig carcass yield by increasing SM (p < .05). The use of SM solely or combined with SS provided higher Se deposition in muscle compared to SS (p < .05). The highest Se deposition in muscle occurred for SM at 0.4 ppm (p < .05). The SS provided higher Se deposition in liver (p < .05). The SM presented best results for meat quality compared to other sources (p < .05). The level of 0.4 ppm Se promoted the best results for the indices of yellow, luminosity, cooking loss and pH (p < .05). The use of SM at any level promotes higher oxidation stability of pig meat (p < .05). The supplementation of SM at a level of 0.4 ppm promotes better physicochemical characteristics and higher Se deposition on swine meat.  相似文献   

Production and characterization of fibroin hydrogel using waste silk fibers     

Natalia Marchesan Bexiga  Antonio Carlos Bloise  Mariana Agostini de Moraes  Attilio Converti  Marisa Masumi Beppu  Bronislaw Polakiewicz 《Fibers and Polymers》2017,18(1):57-63

The use of natural resources, especially processing wastes, as low cost and environmentally friendly alternative aiming high value-added applications is a subject of broad interest. Since the Brazilian silk production annually generates a large amount of waste during the silk fibers processing, this work explores the preparation and characterization of silk fibroin hydrogels using spinning waste silk fibers from textile processing and the processed ones. Hydrogels were obtained directly by dialyzing silk fibroin solutions against frequent changes of water until the gelation point and then lyophilized and characterized in terms of their morphology, crystallinity, thermal resistance and secondary structure. X-ray diffraction analysis revealed the presence of β-sheet conformation related to sol-gel transition. FT-IR spectra indicated the coexistence of random coil (silk I) and β-sheet (silk II) structures, with predominance of β-sheet conformation for hydrogels from processed silk fibers. From thermogravimetric analysis the presence of β-sheet secondary conformation was demonstrated by a degradation peak around 292 °C for both hydrogels. Freeze-dried hydrogels presented sheet or leaf like morphology and no significant change was observed among the hydrogels from waste silk fibers and processed ones. These characteristics suggest that silk fibroin hydrogels prepared from spinning waste silk fibers and obtained directly by dialysis can be potential candidates for biomaterials application, such as drug delivery systems and for wound dressings.  相似文献   

Influence of thermal treatment applied to Fe(III) polyhydroxy cation intercalated vermiculite on the adsorption of atrazine   总被引：1，自引：0，他引：1  

Abate G  Masini JC 《Journal of agricultural and food chemistry》2007,55(9):3555-3560

Intercalation of vermiculite with Fe(III) polyhydroxy cations at 1:1 and 2:1 [OH-]/[Fe(III)] molar ratios increases the affinity of the clay mineral toward atrazine in comparison with potassium saturated vermiculite. The present paper describes the effects of thermal treatments applied to Fe(III) polyhydroxy cations modified vermiculite on the adsorption properties of the clay mineral. Only small changes in the textural characteristics were observed for the materials intercalated with either 1:1 or 2:1 [OH-]/[Fe(III)] molar ratios treated at 100 and 250 degrees C. In comparison with potassium saturated vermiculite, or intercalated vermiculite treated at 100 degrees C, a significant enhancement in the adsorption of atrazine was observed for the materials treated at 250 and 400 degrees C, which removed more than 95.8 and 99.5% of the herbicide initially present in a 50.0 microg L-1 aqueous solution, respectively. In comparison with potassium saturated vermiculite and intercalated vermiculite treated at 100 degrees C, a lower desorption degree of preadsorbed atrazine was observed for both intercalated materials treated at 250 and 400 degrees C. These findings suggest that the thermal treatment produced modified vermiculite materials with a high adsorption capacity and high affinity toward atrazine, with potential application in the removal of this herbicide, as well as other triazines, from aqueous medium.  相似文献