Ocular dimensions,corneal thickness,and corneal curvature in quarter horses with hereditary equine regional dermal asthenia          下载免费PDF全文

Peres R. Badial  Luis Emiliano Cisneros‐Àlvarez  Cláudia Valéria S. Brandão  José Joaquim T. Ranzani  Mayana A.R.V. Tomaz  Vania M. Machado  Alexandre S. Borges 《Veterinary ophthalmology》2015,18(5):385-392

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Quantitation of selected odor-active constituents in dry fermented sausages prepared with different curing salts     

Marco A  Navarro JL  Flores M 《Journal of agricultural and food chemistry》2007,55(8):3058-3065

The odor-active compounds of dry-fermented sausages with added nitrite or nitrate as curing agents were identified by gas chromatography-olfactometry (GC-O) applying the detection frequency (DF) method. The quantification of these compounds in the sausage was determined by multiple headspace solid-phase microextraction (multiple HS-SPME). There were no specific odor-active compounds related to the use of nitrite or nitrate although there were differences in the DF value of several compounds. The nitrite-added sausages presented higher DF values for ethanol, 1-hexanol, propanoic acid, 2-heptenal, and nonanal while the nitrate-added sausages had higher DF values for phenylacetaldehyde and 3-methyl-butanal. Eighteen compounds were quantified by multiple HS-SPME. Most of them were above their air detection thresholds, but only hexanal, heptanal, and 1-octen-3-ol were in a concentration higher than their oil threshold values. These compounds would probably be the main contributors to the aroma of fermented sausages.  相似文献   

Changes in the volatile composition of a semihard ewe milk cheese induced by high-pressure treatment of 300 MPa     

Juan B  Barron LJ  Ferragut V  Guamis B  Trujillo AJ 《Journal of agricultural and food chemistry》2007,55(3):747-754

The effect of high-pressure (HP) treatment (300 MPa, 10 min) on the volatile profile of semihard ewe milk cheeses was investigated. The HP treatment was applied at two different stages of ripening (1 and 15 days; 3P1 and 3P15) and microbiota, proteolysis indexes (soluble nitrogen and total free amino acid content), and volatile compounds were assayed at 15, 60, 90, and 150 days of ripening. The intensity of odor and aroma of cheeses was also assayed. 3P1 cheeses presented the highest content of free amino acids and were characterized by the lowest amounts of aldehydes, ketones, short-chain free fatty acids, and terpenes and higher levels of ethanol and ethyl esters. 3P15 cheeses were characterized by the highest content of short-chain free fatty acids and pyruvaldehyde and the lowest abundance of secondary alcohols and were more similar to control cheeses than those HP-treated on the first day. Intensities of odor and aroma were not significantly influenced by the HP treatment. However, the panellists found some differences in 3P1 as compared with control and 3P15 cheeses in what they perceived as lower odor and aroma quality.  相似文献   

Influence of fungicide residues on the primary fermentation of young lager beer     

Navarro S  Pérez G  Navarro G  Mena L  Vela N 《Journal of agricultural and food chemistry》2007,55(4):1295-1300

The effect of four sterol biosynthesis-inhibiting fungicides added to the pitching wort on the evolution of several organoleptic parameters during the primary fermentation of young lager beer was assessed. Pyrimidine (nuarimol and fenarimol) and triazole (myclobutanil and propiconazole) fungicides were individually supplied to the pitching wort to obtain a concentration of 1 mg/L. A marked influence in the fermentation rate was observed for the samples with propiconazole residues. From the fourth day onward, the fermentation prematurely ceased (stuck fermentation), and therefore, statistical significant differences were found in fermented extract, alcohol content, fermentable carbohydrates, pH, color, and total polyphenol and flavonoid contents of beer. Myclobutanil residues are only influenced in the total polyphenol and flavonoid contents, while differences in the analyzed parameters were not noticeable for the samples containing nuarimol and fenarimol residues in comparison with the blank sample.  相似文献   

D-amino acid formation in sterilized alkali-treated olives     

Casado FJ  Sánchez AH  Rejano L  Montaño A 《Journal of agricultural and food chemistry》2007,55(9):3503-3507

The occurrence of d-amino acids in commercial ripe olives, a well-known sterilized alkali-treated product, was investigated by high-performance liquid chromatography (HPLC) with precolumn automatic derivatization. Absolute amounts of D-amino acids were in total 18.6-38.2 mg/100 g edible portion. The major D-amino acids were D-aspartic acid, D-glutamic acid, D-serine, and D-leucine. Furthermore, to evaluate the effects of sterilization time and olive pH on amino acid racemization, a simulated processing of green ripe olives was carried out. Serine (both free and bound form) was the most-racemized amino acid after heat treatment. Sterilization (15-35 min at 121 degrees C) increased the racemization values of both free and protein-bound amino acids, although in case of protein-bound phenylalanine the increase was not statistically significant. With an increase of pH from 8 to 10 units, the racemization values of all amino acids increased significantly, except for free forms of aspartic and glutamic acids. In general, the effects of the sterilization time and olive pH on total concentration (L + D enantiomers) of each amino acid were also significant.  相似文献   

Volumetric properties of sunflower methyl ester oil at high pressure     

Aparicio C  Guignon B  Rodríguez-Antón LM  Sanz PD 《Journal of agricultural and food chemistry》2007,55(18):7394-7398

Biodiesel is an alternative to diesel oil (DO), because it is a fuel obtained from renewable resources that has lower emissions than DO. Biomass production should promote agricultural activity to obtain fuels for the transport sector. The study of the behavior of biodiesel at varying pressure and temperature is very interesting because diesel engines are mechanical systems that work with fuels submitted to high pressure. The specific volume, isothermal compressibility, and cubic expansion coefficients of refined sunflower methyl ester oil (SMEO) and unrefined sunflower methyl ester oil (URSMEO) were obtained and compared with those of DO from 0.1 to 350 MPa and 288.15 to 328.15 K. This work shows that oil refinement did not significantly modify any of the properties studied of the final biodiesel. Compared with DO, both SMEOs were about 6% denser, whereas isothermal compressibility and cubic expansion coefficients were bigger or smaller for DO depending on pressure and temperature.  相似文献   

Less is more: Little seed processing required for direct seeding in seasonal tropics     

Correia  Matheus Rezende de Mesquita  Ferreira  Maxmiller Cardoso  Alves  Monique  Consolaro  Hélder Nagai  Vieira  Daniel Luis Mascia 《New Forests》2022,53(4):695-719

Seed processing and dormancy break treatments are recommended for rendering seeds restoration-ready. Conversely, fruit structures and seed coats may protect seeds from environmental harm in the field. We evaluated the effects of seed processing (by either keeping fruit structures or extracting seeds) and/or scarification (of physically dormant seeds) on the seedling emergence and establishment of 10 legume tree species from tropical forests and savannas of Central Brazil. We sowed seeds in a greenhouse for reference and in a field experiment conducted in tilled ready-to-seed sites. We monitored seedling emergence and survival for a year. We calculated the costs of harvesting, processing, and pretreating seeds, and considered the final cost of a 1-year-old seedling. Seed extraction resulted in lower emergence for most species in the greenhouse and in the field. It also accelerated emergence of three and four species in the greenhouse and the field, respectively. Scarification resulted in lower seedling emergence in the field for half of the species, while it increased emergence of three species in the greenhouse. Most species presented accelerated emergence both in the greenhouse and the field. The seedling cost was 1.6 to 74.6 times higher when seeds were processed, and 1.3 to 6.0 times when seeds were scarified, except for one species. Keeping fruit structures and seed coats reduced the costs of seeds and increased the success of direct seeding.

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Essential oils-based repellents for the management of Myzus persicae and Macrosiphum euphorbiae     

Cant&#;-Tejero  Manuel  Casas  Jos&#; Luis  Marcos-Garc&#;a  Mar&#;a &#;ngeles  Pascual-Villalobos  Mar&#;a Jes&#;s  Florencio-Ortiz  Victoria  Guirao  Pedro 《Journal of pest science》2022,95(1):365-379

Journal of Pest Science - Aphids are one of the major agricultural pests in the world. Their pest management in pepper greenhouses is based on integrated control with release of natural enemies and...  相似文献   

Variation and genetic parameters of axial resin canal features in clones and families of Pinus radiata     

Govina  James Kudjo  Apiolaza  Luis A.  Altaner  Clemens M. 《New Forests》2021,52(1):167-176

New Forests - Resin canal features are associated with significant economic losses to appearance grade Pinus radiata timber. This study investigated the variation in resin canal features in young,...  相似文献   

Fish feed can show genotoxic damage     

Ota  Erika do Carmo  Cardoso  Claudia Andrea Lima  Inoue  Luis Antonio Kioshi Aoki  Zanon  Ricardo Basso  Silva  Tarcila Souza de Castro 《Fish physiology and biochemistry》2022,48(3):735-748

Fish Physiology and Biochemistry - The present study was carried out to evaluate the genotoxic potential of nutritional quality of feed, using erythrocytic nuclear abnormalities assay in Nile...  相似文献