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1.
J. F. BALLESTER-OLMOS J. A. PINA E. A. CARBONELL P. MORENO A. HERMOSO DE MENDOZA M. CAMBRA L. NAVARRO 《Plant pathology》1993,42(2):219-229
A survey of citrus tristeza virus (CTV) isolates was carried out in most citrus-growing areas in Spain. Twenty-two isolates were selected by geographical origin, cultivar of source tree, and symptoms observed on the host or in preliminary tests, and were biologically characterized.
A wide range of variation in transmissibility by aphids and symptom intensity on nine different indicator species or scion-rootstock combinations was observed among CTV isolates. Mexican lime. Citrus macrophylla , and to a lesser extent citron were the most useful hosts for characterizing these isolates, and leaf symptoms and stem pitting were the most discriminating traits. Positive correlation was observed between symptoms induced on Mexican lime and C. macrophylla , but not between the symptoms induced on these indicators under greenhouse conditions and the homologous symptoms on plants grown in the screenhouse. Some of the traits studied enabled us to establish relatively well-defined groups of isolates, but in most cases a continuous range of variation was obtained and no clear group could be defined. 相似文献
A wide range of variation in transmissibility by aphids and symptom intensity on nine different indicator species or scion-rootstock combinations was observed among CTV isolates. Mexican lime. Citrus macrophylla , and to a lesser extent citron were the most useful hosts for characterizing these isolates, and leaf symptoms and stem pitting were the most discriminating traits. Positive correlation was observed between symptoms induced on Mexican lime and C. macrophylla , but not between the symptoms induced on these indicators under greenhouse conditions and the homologous symptoms on plants grown in the screenhouse. Some of the traits studied enabled us to establish relatively well-defined groups of isolates, but in most cases a continuous range of variation was obtained and no clear group could be defined. 相似文献
2.
Abstract. The effectiveness of xylocaine anaesthesia, potentiated with sodium bicarbonate, was investigated on the altiplano cyprinid, Algansea lacustris Steindachner. The drug gave excellent sedation, handling and recovery and was effective at doses between 50 and 300 mg/l in 1 g/l sodium bicarbonate. 相似文献
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M. PÉREZ R. REAL G. MENDOZA G. MERINO J. G. PRIETO A. I. ALVAREZ 《Journal of veterinary pharmacology and therapeutics》2009,32(5):498-502
Studies on residues in milk used for human consumption have increased due to health concerns and priority interest in the control of potentially risky drugs. The protein BCRP/ABCG2, present in the mammary epithelia, actively extrudes drugs into milk and can be modulated by isoflavones. Nitrofurantoin is a specific BCRP substrate which is actively excreted into milk by this transporter. In this research, we studied nitrofurantoin transport into milk in four experimental groups: G1‐calves fed forage with isoflavones; G2‐calves fed forage with isoflavones and administered exogenous genistein and daidzein; G3‐calves fed forage without isoflavones; G4‐calves fed forage without isoflavones and administered exogenous genistein and daidzein. Results show increased levels of nitrofurantoin in milk from calves without isoflavones (G3) and decreased nitrofurantoin residues in milk when isoflavones were present, either by forage (G1 and G2) or by exogenous administration (G4). The values of Cmax in milk were significantly lower in those groups with isoflavones in forage (G1, G2). Plasma levels were low and unmodified among the groups. Inter‐individual variation was high. All these results seem to point to a feasible control of drug secretion into milk through isoflavones in the diet when the drug is a good BCRP/ABCG2 substrate. 相似文献
5.
Transmission tests were conducted in the laboratory to determine which are the aphid species responsible for the great natural spread of plum pox potyvirus (PPV) observed in the field in Spain. Woody hosts were used in these tests and different transmission techniques were compared. The aphid species tested were Myzus persicae, Aphis gossypii, A. spiraecola, A. fabae, Hyalopterus pruni and Brachycaudus prunicola. Although the transmission rates obtained were, in general, quite low, it can be stated that, except for B. prunicola (pending confirmation of results), all species tested transmitted PPV under the conditions of the trial. 相似文献
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Asymmetrasca decedens was the most important of three leafhoppers found infesting almond trees in eastern Spain in late summer 1996, causing stunting of the shoots with small curled leaves. Only non-bearing trees were affected. Although the species has previously been recorded on peach in Spain, this is the first record on almond. 相似文献
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R. MENDOZA C. AGUILERA L. CARREÓN J. MONTEMAYOR & M. GONZÁLEZ 《Aquaculture Nutrition》2008,14(3):223-231
Growth performance and survival of alligator gar (Atractosteus spatula) larvae fed Artemia nauplii, two artificial diets (with different protein content and buoyancy) and a control under starvation at first feeding [5 days after hatching (5 DAH)] were studied. All larvae under starvation (C) died at 10 DAH, while survival was near 60% for the rest of the treatments at the end of the experimental period. By the end of the experimental period morphological variables (total length, snout length, wet weight and dry weight) were better in larvae fed the artificial diets compared to live food. These results were confirmed by means of nucleic acid indexes and digestive enzymatic activity. The importance of the relationship between diet size and snout gape was evidenced from these results. Differences between artificial diets were attributed to different digestibility values. Alligator gar larvae are able to grow and survive satisfactorily when fed artificial diets from the start of exogenous feeding, provided that these have an adequate size, buoyancy and quality. 相似文献
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DORA GUTIÉRREZ SANDRA MENDOZA VALENTINA SERRANO MOUSTAPHA BAH RICARDO PELZ PATRICIA BALDERAS FIDEL LEÓN 《Weed Biology and Management》2008,8(4):291-296
Many wild weeds are used in Mexico as fodder. Due to their economic value, this investigation was undertaken to determine the chemical composition of 14 species. The mineral, crude protein, fiber, and total phenolic content, as well as the antioxidant activity, was determined. There was a significant variation in the mineral content among the 14 weeds, which all had calcium and potassium as the predominant elements. According to the results, some of the weeds might represent possible mineral deficiency sources, making the supplementation of certain minerals advisable. Although five of the species contained a low concentration of magnesium, the overall mineral ratios of the forage weeds were at safe levels, preventing grazing animals suffering from grass tetany, in contrast to the excessive calcium : phosphorus ratios that can affect their normal growth and bone development. The crude fiber and protein content in most of the weeds fell into the recommended range for the maintenance of cattle. The phenolic content of the studied weed extracts was higher than that reported for several Mediterranean forage species. These phenolic profiles correlate well with the radical scavenging activities of the extracts. 相似文献
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Ngo T.B. TRAN Hiroshi SHIMODA Junko MIZUNO Keita ISHIJIMA Kenzo YONEMITSU Shohei MINAMI Supriyono Yudai KURODA Kango TATEMOTO Milagros V. MENDOZA Ai TAKANO Masahiko MUTO Haruhiko ISAWA Kyoko SAWABE Daisuke HAYASAKA Ken MAEDA 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2022,84(1):82
Kabuto Mountain virus (KAMV), the new member of the genus Uukuvirus, was isolated from the tick Haemaphysalis flava in 2018 in Japan. To date, there is no information on KAMV infection in human and animals. Therefore, serological surveillance of the infection among humans and wild mammals was conducted by virus-neutralization (VN) test and indirect immunofluorescence assay (IFA). Sera of 24 humans, 59 monkeys, 171 wild boars, 233 Sika deer, 7 bears, and 27 nutria in Yamaguchi Prefecture were analyzed by VN test. The positive ratio of humans, monkeys, wild boars, and Sika deer were 20.8%, 3.4%, 33.9% and 4.7%, respectively. No positive samples were detected in bears and nutria. The correlation coefficients between VN test and IFA in human, monkey, wild boar, and Sika deer sera were 0.5745, 0.7198, 0.9967 and 0.9525, respectively. In addition, KAMV was detected in one pool of Haemaphysalis formosensis ticks in Wakayama Prefecture. These results indicated that KAMV or KAMV-like virus is circulating among many wildlife and ticks, and that this virus incidentally infects humans. 相似文献
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M.A. PORCHAS‐CORNEJO L.R. MARTÍNEZ‐CÓRDOVA L. RAMOS‐TRUJILLO J. HERNÁNDEZ‐LÓPEZ M. MARTÍNEZ‐PORCHAS F. MENDOZA‐CANO 《Aquaculture Nutrition》2011,17(2):e622-e628
The effect of promoted biota on the production parameters, water quality, nutritional and immunological condition of Litopenaeus vannamei was assessed in semi‐intensive ponds. Earthen ponds were used as experimental units: three with formulated + natural promoted feed + shrimp (T1), three with formulated feed + shrimp (T2), and three with promoted natural feed without shrimp (Control). The dissolved oxygen (DO) levels were optimal for all treatments (≥6 mg L?1) as well as the pH (8.4–8.6). Total ammonia nitrogen was greater in T2 (0.10 mg L?1) than T1 (0.07 mg L?1) and the Control (0.06 mg L?1). Phytoplankton, zooplankton and benthos were more abundant in T1 and the Control. The promotion of natural feed had a positive effect on all the production parameters of shrimp with an increase of 19.0%, 3.5% and 23.9% in weight gain, survival, and final biomass, respectively; also it was observed a decrease of 13.9% in feed conversion ratio. No differences in haemolymph parameters were observed for nutritional indicators (glucose, cholesterol, proteins, and triglycerides) nor for immunological response (phenoloxidase and prophenoloxidase). The results indicate that the promotion of biotic communities enhances the production parameters of farmed shrimp, without affecting the nutritional and immunological status. Also the water quality was improved by the presence of biota. 相似文献