Does salinity affect growth and carrageenan yield of Kappaphycus alvarezii (Gigartinales/Rhodophyta)?     

Renata Perpetuo Reis  Rafael Rodrigues Loureiro  Frederico Sampaio Mesquita 《Aquaculture Research》2011,42(8):1231-1234

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Effect of different formulations on tebuconazole residues in stone fruits     

Luigi Lucini  Gian Pietro Molinari 《Pest management science》2009,65(4):440-443

BACKGROUND: The correlation between pesticide residue levels and formulation of an active substance is often not considered, even if it is reasonable to expect some differences arising from behaviour during dilution and spraying, from adhesion to plant and from degradation. An experimental study to investigate the magnitude of tebuconazole residues as a function of different tebuconazole formulated products was carried out in Italy. The fungicide was applied as wettable powder (WP) and water‐dispersible granule (WG) formulations to peach, plum, apricot and nectarine orchards, on four different sites. The fruit samples gained from the field trials were quantitatively analysed by gas chromatography with a nitrogen phosphorus detector (GC/NPD) for tebuconazole residues. RESULTS: Tebuconazole residues in the fruits gained from the plot treated with the WP formulation, 14 days after application, were in the range 0.01–0.07 mg kg^?1, while corresponding residues in the plot treated with the WG formulation were in the range 0.01–0.06 mg kg^?1. CONCLUSION: No significant differences in the residue levels of tebuconazole could be observed between the trials conducted with the WP and the WG formulation. Copyright © 2009 Society of Chemical Industry  相似文献   

Fish Meal Replacement with Soy‐derived Protein in Feeds for Juvenile Cobia: Influence of Replacement Level and Attractant Supplementation     

Jesse Trushenski  Jérôme Laporte  Heidi Lewis  Michael Schwarz  Brendan Delbos  Ricardo Takeuchi  Luís A. Sampaio 《Journal of the World Aquaculture Society》2011,42(3):435-443

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Growth,diet, and reproduction of Eurasian perch <Emphasis Type="Italic">Perca fluviatilis</Emphasis> L. in Lake Varese,northwestern Italy     

Pietro Ceccuzzi  Genciana Terova  Fabio Brambilla  Micaela Antonini  Marco Saroglia 《Fisheries Science》2011,77(4):533-545

No data have previously been reported on Eurasian perch Perca fluviatilis L. in Lake Varese. In this study, the growth, diet, and reproductive biology of the Eurasian perch population were investigated with the aim of providing information that may serve as a basis for efficient resource management. A total of 240 specimens were caught during the monthly sampling campaign from November 2006 through October 2008. The length-to-weight relationships were W _t = 8.4 × 10⁻³ L _t^3.10 (males) and W _t = 4.1 × 10⁻³ L _t^3.36 (females). The parameters for the von Bertalanffy growth function for pooled sexes were L _∞  = 33.17 cm, k = 0.20 year⁻¹, and t ₀ = −1.34 year. Perch in Lake Varese spawn from April through May. Sexual maturity is reached when males are 2 years old, in females mostly when they are 3 years old. Relative fecundity (F _rel) and absolute fecundity (F _abs) were assessed for females. Fecundity values were similar to data reported for other European populations: females of age 2+ F _rel = 102,457 ± 12,275, age 3+ F _rel = 131,767 ± 5,891, and age 4+ F _rel = 131,252 ± 15,555. Perch diet spectrum was wide and somewhat characterized by season. Perch in Lake Varese feed on macroinvertebrates, mainly Chironomidae and Chaoborus, zooplankton, and juvenile rudd Scardinius erythrophthalmus.  相似文献   

Influence of Bacillus thuringiensis application timing on population dynamics of gypsy moth in Mediterranean cork oak forests     

Roberto Mannu  Arturo Cocco  Pietro Luciano  Andrea Lentini 《Pest management science》2020,76(3):1103-1111

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Chemical profile of rums as a function of their origin. The use of chemometric techniques for their identification     

Sampaio OM  Reche RV  Franco DW 《Journal of agricultural and food chemistry》2008,56(5):1661-1668

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Heat shock protein 70 kDa (HSP70) increase in sea bass (Dicentrarchus labrax, L 1758) thymus after vaccination against Listonella anguillarum     

Francesco Mosca  Nicla Romano  Daniela Malatesta  Giuseppina Ceccarelli  Andrea Brunetti  Chiara Bulfon  Donatella Volpatti  Luigi Abelli  Marco Galeotti  Anastasia Falconi  Pietro G. Tiscar 《Fish physiology and biochemistry》2013,39(3):615-626

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Effect of aromatable androgen (17‐methyltestosterone) on induced maturation of silver European eels (Anguilla Anguilla): Oocyte performance and synchronization          下载免费PDF全文

Oliviero Mordenti  Pietro Emmanuele  Antonio Casalini  Pieter Mark Lokman  Annalisa Zaccaroni  Andrea Di Biase  Albamaria Parmeggiani 《Aquaculture Research》2018,49(1):442-448

The reproductive performances of silver European eel in term of gonad development and egg production, employing slow‐release implants with the androgen 17‐MT (1 mg) in combination with traditional weekly injection of carp pituitary extract (CPE) was evaluated. Wild female European eels (Anguilla anguilla) underwent a standard induction protocol with CPE and were randomly divided into three groups (N‐group, no implant; Y‐group, with implant; and control, C‐group, no treatment). The results showed that 17‐MT‐treated females (Y‐group) reproduced spontaneously about 6 weeks earlier than the N‐group females with a saving of almost 40% in CPE and time of induction. Concerning artificial induction of maturation in female silver eels, our study demonstrated that they positively respond to androgen exposure also in terms of eggs productivity. Indeed, Y‐group was more productive than N‐group: in Y‐group, 11 eels ensured an eggs production that exceeded 50% of initial body weight (BW), whereas in N‐group only three eels have exceeded this value. The results suggest that 17‐MT should be considered in future protocols for the improvement of the artificial reproduction of female silver European eels.  相似文献   

Antibacterial activity of red and white wine against oral streptococci     

Daglia M  Papetti A  Grisoli P  Aceti C  Dacarro C  Gazzani G 《Journal of agricultural and food chemistry》2007,55(13):5038-5042

Wine contains a number of biologically active compounds with beneficial effects on human health. The antibacterial action of commercial red and white wines against oral streptococci responsible for caries development and against S. pyogenes responsible for pharyngitis was studied. Its postcontact effect against S. mutans was also studied. Both wines displayed activity. The compounds responsible for such activities were succinic, malic, lactic, tartaric, citric, and acetic acid. The synthetic mixtures of the organic acids tested at the concentrations found in wine had greater antibacterial activity than the beverages, indicating that in wine they are inhibited by other components. Wine polyphenols displayed no activity against oral streptococci or S. pyogenes. Findings show that wine is active against oral streptococci and S. pyogenes and suggest that it enhances oral health.  相似文献   

Isolation, identification, and quantification of roasted coffee antibacterial compounds     

Daglia M  Papetti A  Grisoli P  Aceti C  Spini V  Dacarro C  Gazzani G 《Journal of agricultural and food chemistry》2007,55(25):10208-10213

Coffee brew is a widely consumed beverage with multiple biological activities due both to naturally occurring components and to the hundreds of chemicals that are formed during the roasting process. Roasted coffee extract possesses antibacterial activity against a wide range of microorganisms, including Staphylococcus aureus and Streptococcus mutans, whereas green coffee extract exhibits no such activity. The naturally occurring coffee compounds, such as chlorogenic acids and caffeine, cannot therefore be responsible for the significant antibacterial activity exerted by coffee beverages against both bacteria. The very low minimum inhibitory concentration (MIC) found for standard glyoxal, methylglyoxal, and diacetyl compounds formed during the roasting process points to these alpha-dicarbonyl compounds as the main agents responsible for the antibacterial activity of brewed coffee against Sa. aureus and St. mutans. However, their low concentrations determined in the beverage account for only 50% of its antibacterial activity. The addition of caffeine, which has weak intrinsic antibacterial activity, to a mixture of alpha-dicarbonyl compounds at the concentrations found in coffee demonstrated that caffeine synergistically enhances the antibacterial activity of alpha-dicarbonyl compounds and that glyoxal, methylglyoxal, and diacetyl in the presence of caffeine account for the whole antibacterial activity of roasted coffee.  相似文献