Effect of floor cooling on performance of lactating sows during summer   总被引：2，自引：0，他引：2  

B.A.N. Silva  R.F.M. Oliveira  J.L. Donzele  H.C. Fernandes  M.L.T. Abreu  J. Noblet  C.G.V. Nunes 《Livestock Science》2006,105(1-3):176-184

Forty Landrace × Large White lactating sows were used to evaluate the effects of cooling of the floor when maintained under high temperature conditions during summer on their productive and reproductive performance. The sows were allocated in a completely randomized design with two treatments with 20 replicates according to parity number and body weight, with each animal being considered an experimental unit. The treatments consisted of cooling of the floor under the sow with water circulation at about 17 °C and no cooling. The resulting temperatures of the floor were 27.6 and 35.8 °C for the cooled and the control treatments, respectively. The sows from both treatments were exposed to average maximum and minimum environmental temperatures of 26.9 and 20.8 °C, respectively. Sows maintained on a cooled floor had a higher feed intake (6.47 vs. 5.61 kg/day; P < 0.01). Despite this higher intake, sows maintained on a cooled floor had higher body weight and body protein losses during the lactation period (P < 0.01) in connection with a higher milk yield and subsequent growth of the litter (2280 vs. 1798 g/day; P < 0.01). There was an effect of treatment on rectal temperature, surface temperatures and respiratory rate (P < 0.01) with lower values in sows submitted to floor cooling. It is concluded that floor cooling under the lactating sow improves its productive and reproductive performance, as well as the performance of its litter.  相似文献   

Electro-acupuncture and Chinese herbs for treatment of cervical intervertebral disk disease in a dog     

Ayne Murata Hayashi  Júlia Maria Matera  Tatiana Soares da Silva  Ana Carolina Brand?o de Campos Fonseca Pinto  Sílvia Renata Gaido Cortopassi 《Journal of veterinary science (Suw?n-si, Korea)》2007,8(1):95-98

A non-ambulatory dog with tetraparesis following a pain episode that had evolved over 2 months was submitted for medical treatment and diagnosed with intervertebral disk disease at C3-C4 and dorsal extradural compression at C1-C2 and C3-C4 using myelography and computed tomography. The dog experienced ambulation recovery after 15 days of treatment with only electroacupuncture and Chinese herbal medicine, with marked improvement occurring after only 10 treatments. Six months of follow-up demonstrated that the dog was stable and had no recurrence of symptoms. Therefore, it was concluded that the combination of electroacupuncture and Chinese herbal medicine was responsible for motor rehabilitation.  相似文献   

Renal cell carcinoma with bone metaplasia in a horse     

N.M. Ocarino DVM  MS  A.E. Silva DVM  MS  S.A. Frana DVM  M.A. Rachid DVM  PhD  E.F. Nascimento DVM  PhD  M.S. Palhares DVM  PhD  V.A. Gheller DVM  PhD  R. Serakides DVM  PhD 《Journal of Equine Veterinary Science》2006,26(4):168-170

A case of renal tubular carcinoma with bone metaplasia is reported in a 20-year-old male, mixed breed horse having a history of weight loss and hematuria. This report includes the clinical signs, macroscopic and microscopic lesions, and the immunohistochemical findings of this neoplasm.  相似文献   

Retrospective study of 942 small-sized dogs: Prevalence of left apical systolic heart murmur and left-sided heart failure, critical effects of breed and sex     

Pierre Serfass DVM  Valrie Chetboul DVM  PhD  Dipl ECVIM  Carolina Carlos Sampedrano DVM  MS  Audrey Nicolle DVM  Thierry Benalloul DVM  Herv Laforge DVM  Christophe Gau DVM  Carole Hbert DVM  Jean-Louis Pouchelon DVM  PhD  Renaud Tissier DVM  PhD 《Journal of Veterinary Cardiology》2006,8(1):11-18

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Sap flow in papaya plants: Laboratory calibrations and relationships with gas exchanges under field conditions     

Fabrício de Oliveira Reis  Eliemar Campostrini  Elias Fernandes de Sousa  Marcelo Gabetto e Silva 《Scientia Horticulturae》2006

In papaya plants a study to quantify the water flow through the trunk is important for to promote a good water management in commercial orchard. The objective was to study the relationship between water flow through the trunk and temperature measurements determined by probes inserted in the papaya plant stem in laboratory. In addition, was possible to study the relationship between sap flow and instantaneous gas exchange in field conditions. We constructed an instrument that maintained a stable water flux through a 0.30 m stem section with a constant pressure, simulating the xylem sap flow through the stem. Water flux was adjusted by varying pressure of water in the stem section. The mathematical model used to fit the relation between K (Granier heat coefficient) values and sap flow density was the exponential model: u = 0.5511 × K^1.9104. Field studies was conducted in a commercial orchard located in North of the State of Rio de Janeiro, with 12 plants in October 2002, and eight plants in January 2003. We verified that instantaneous transpiration, measured by a portable system of gas exchange (porometry), presented a good (R² = 0.75) positive relationship with xylem sap flow. Estimates of papaya sap flow can be obtained by scaling portable photosynthesis system measurements with exposed leaves, however the relationship is non-linear in higher instantaneous transpiration rates. The causes of the non-linear relationship in higher transpiration are discussed. In addition, was possible to obtain a good (R² = 0.76) relationship between net photosynthesis rate and xylem sap flow in papaya field-grown.  相似文献   

Molecular systematics in Chrysanthemum × grandiflorum (Ramat.) Kitamura     

J. Chatterjee  A.K.A. Mandal  S.A. Ranade  Jaime A. Teixeira da Silva  S.K. Datta 《Scientia Horticulturae》2006

An attempt was made to understand the molecular systematics and genetic differences between 10 original chrysanthemum cultivars and 11 mutants. The similarity among the cultivars and mutants varied from 0.17 to 0.90 using RAPD analyses, a simple but efficient method to distinguish cultivars and to assess parentage. Two distinct groups were found. Two cultivars were present as a separate group showing differences from all other cultivars. Mutants with different flower colour could be identified at the molecular level using RAPD technique holding promise to identify unique genes as SCAR markers. A high genetic distance among the different chrysanthemums showed that there exists a possibility of introgressing new and novel genes from the chrysanthemum gene pool.  相似文献   

Uncoupling and inhibition properties of 3,4-seco-friedelan-3-oic acid isolated from Maytenus imbricata     

Silvia Ribeiro de Souza e Silva  Luiz Claúdio de Almeida Barbosa  Beatriz King-Diaz  Blas Lotina-Hennsen 《Pesticide biochemistry and physiology》2007,87(2):109-114

3,4-Seco-friedelan-3-oic acid was isolated from Maytenus imbricata (Celastraceae). At low concentrations it inhibited non-cyclic electron transport and ATP synthesis in spinach chloroplasts, i.e., it behaved as a Hill reaction inhibitor, and at high concentrations it acts as an uncoupler by enhancing uncoupled electron transport and Mg²⁺-ATPase activity. 3,4-Seco-friedelan-3-oic acid did not inhibit PSII electron transport from DPC to DCPIP_ox and photosystem I activity, but it enhanced from TMQH₂ to MV, corroborating its action as uncoupler. It inhibits electron flow through PSII from water to sodium silicomolybdate. The whole results indicate that the 3,4-seco-friedelan-3-oic acid target is at the OEC complex enzyme, the donor side of PSII. The fluorescence decay data shows the formation of the K-band, which match this result, acting as inhibitor at the donor side of PSII and it as an uncoupler.  相似文献   

Effects of deltamethrin on hematological parameters and enzymatic activity in Ancistrus multispinis (Pisces, Teleostei)     

C.T. Pimpão  H.C. Silva de Assis 《Pesticide biochemistry and physiology》2007,88(2):122-127

Deltamethrin (DM) is a pyrethroid insecticide widely used in Brazilian crops and in pest-control programs because of its low environmental persistence and toxicity. It has been shown to exert a wide range of effects on non-targeted organisms including fishes. The aim of this study to evaluate the effects of deltamethrin through the hematological and biochemical parameters using Ancistrus multispinis as animal model. First, blood of A. multispinis was collected by cardiac puncture in order to evaluate the basal values of the total cell counts, hemoglobin and hematocrit rates. A. multispinis showed low number leukocytes, red blood cells and hemoglobin compared to other species. The intoxication with DM (0.1 or 0.3 mg kg⁻¹) induced leukocytosis and increases the number of erythrocytes and hemoglobin levels 96 h after the injection when compared to vehicle-injected animals. The injection of lipopolysaccharide (LPS) also induced a significant leukocytosis and increased the erythrocytes number 4 h after the injection. The combination of the higher dose of DM with LPS showed an additional effect in the number of leukocytes and erythrocytes. The GST and EROD activities were also evaluated in the gills and liver, respectively, 96 h after intoxication with both doses of DM. The GST activity decreased after DM intoxication in both doses while EROD activity was not significantly different. These results suggest that A. multispinis is a valuable model for ecotoxicological studies. Also, DM can affect the metabolizing system (GST) and immunologic system of A. multispinis, a condition that can be worsened in the presence of inflammation or infection.  相似文献   

Reaction of cucurbits species to infection with Zucchini lethal chlorosis virus     

J.S. Giampan  J.A.M. RezendeR.F. Silva 《Scientia Horticulturae》2007

Zucchini lethal chlorosis virus (ZLCV) is a tospovirus that infects species of cucurbits in Brazil and is transmitted by the thrips Frankliniella zucchini. The purpose of the present work was to evaluate the reaction of seven species of cucurbits to infection with ZLCV under field and greenhouse conditions in Piracicaba County, SP. In the field experiment, ZLCV infection occurred naturally. In the greenhouse, plants were mechanically inoculated with ZLCV at the cotyledonal stage. Evaluations were based on symptoms expression and detection of the virus by PTA-ELISA. The percentages of infected plants for field and greenhouse assays, respectively, are indicated in parenthesis for each species/cultivar: Cucurbita pepo var. Caserta (72.9 and 70.7); C. maxima var. Alice (16.0 and 10.4); C. maxima var. Exposição (0.0 and 0.0); C. moschata var. Menina Brasileira (29.2 and 18.2); C. maxima × C. moschata hybrid Takaiama (63.4 and 42.7); Citrullus lanatus var. Crimson Sweet (25.0 and 25.0); Cucumis sativus var. Safira (14.3 and 41.2); and C. anguria (21.4 and 22.7).  相似文献   

Molecular, physiological and pathological characterization of Corynespora leaf spot fungi from rubber plantations in Sri Lanka   总被引：4，自引：0，他引：4  

W. P. K. Silva  B. J. Deverall  & B. R. Lyon 《Plant pathology》1998,47(3):267-277

The plant pathogenic fungus Corynespora cassiicola causes a severe leaf spot disease on more than 70 host plant species including Hevea brasiliensis . Genetic variability in 32 isolates of C. cassiicola collected from diverse hosts and locations in Sri Lanka and Australia was assessed using restriction fragment length polymorphism (RFLP) analysis of the internal transcribed spacer (ITS) region of ribosomal DNA and random amplified polymorphic DNA-polymerase chain reaction (RAPD-PCR) analysis of total fungal DNA. Amplified ITS fragments from all 32 C. cassiicola isolates exhibited an identical size, and restriction analysis with seven different restriction endonucleases revealed identity in all of the detected DNA fragments. This finding of high genetic relatedness was further supported by the cloning and DNA sequencing of the ITS2 region from one Sri Lankan and one Australian isolate. However, RAPD-PCR profiles generated by 15 oligonucleotide decamer primers revealed significant polymorphism between groups of organisms. Genetic relationships among the isolates were determined by cluster analysis of the RAPD-PCR data and seven different RAPD groups were identified. Isolates showed strong correlations between the assigned RAPD group and the location and host plant genotype from which the isolate was collected. Correlations were also observed between the RAPD group, growth of the isolate and pathogenicity on different plant hosts.  相似文献