Biological activity of astilbin from Dimorphandra mollis against Anticarsia gemmatalis and Spodoptera frugiperda     

Batista Pereira LG  Petacci F  Fernandes JB  Corrêa AG  Vieira PC  da Silva MF  Malaspina O 《Pest management science》2002,58(5):503-507

Astilbin was isolated in high yield from Dimorphandra mollis, and its insecticidal and growth inhibiting activity by stomach ingestion were evaluated against Anticarsia gemmatalis and Spodoptera frugiperda. The insecticidal activity of astilbin, the weight reduction of the larval phase and the prolongation of the larval and pupal phases were verified for both species. Astilbin was identified on the base of its NMR, MS and physical data.  相似文献   

Assessing the duration of persistence and shedding of porcine reproductive and respiratory syndrome virus in a large population of breeding-age gilts   总被引：1，自引：0，他引：1       下载免费PDF全文

Laura Batista  Scott A. Dee  Kurt D. Rossow  John Deen    Carlos Pijoan 《Canadian journal of veterinary research》2002,66(3):196-200

Porcine reproductive and respiratory syndrome virus (PRRSV) is an RNA virus in the order Nidovirales, family Arteriviridae, genus Arterivirus. The virus induces a prolonged viremia, replicates in macrophages, and produces persistent infection. The purpose of this study was to determine if PRRSV could persist for 90 d or more in a large population of breeding-age gilts housed under environmental conditions typical of commercial swine production and to determine if experimentally infected gilts could shed virus to naïve sentinel gilts beyond 90 d postinfection. Using the intranasal route, we inoculated 120 PRRSV-naïve gilts, 4 mo of age, with 5 mL of cell culture fluid containing a total dose of 10^2.4 TCID₅₀ of a field isolate (MN-30100) of PRRSV. The index gilts were organized into 3 groups (A, B, and C), 40 gilts per group. To assess the dynamics of the experimental infection, a monitor group of 30 index gilts was blood-tested on days 0, 3, 7, 14, 30, 60, 90, 120, 150, and 180 postinfection. PRRSV viremia was detected with the polymerase chain reaction (PCR) on days 3, 7, and 14 and by virus isolation (VI) on days 7 and 14. PRRSV antibodies were detected from day 14 by enzyme-linked immunosorbent assay (ELISA). To assess shedding, 30 PRRSV-naïve sentinel gilts were commingled with the index gilts on day 90 postinfection and tested by PCR, VI, and ELISA every 15 d until 180 d postinfection; all samples were negative. To assess persistence, 40 index and 10 sentinel gilts were slaughtered at 120 (group A), 150 (group B), or 180 (group C) d postinfection. Evidence of PRRSV was not detected by PCR or VI in any tissue samples from the 120 index gilts. These results indicate that persistence and shedding of PRRSV are of short duration in breeding-age gilts.  相似文献   

Evaluation of intraocular and partial CO2 pressure in dogs anesthetized with propofol     

Batista CM  Laus JL  Nunes N  Patto Dos Santos PS  Costa JL 《Veterinary ophthalmology》2000,3(1):17-19

The effects of propofol on intraocular pressure (IOP) and end tidal CO₂ (ETCO₂) were studied because an elevation in the latter may alter IOP. Twenty dogs were divided into two groups (G1 and G2). G1 dogs were induced with 10 mg/kg (IV) of propofol followed by a 0.4 mg/kg/min continuous infusion of the same agent diluted in a 0.2% dextrose solution for 1 h. G(CAPS) 2 dogs served as the control group, where only dextrose solution was administered, under the same time intervals as in G1. Applanation tonometry (Tono-Pen) was used to determine IOP and ETCO₂ as a method to determine partial CO₂ pressure. Measurements were taken every 15 min for 1 h, with M1 occurring immediately before IV administration. IOP and ETCO₂ were not statistically significant in either groups. Based on the results, it may be concluded that propofol does not alter IOP and ETCO₂.  相似文献   

高效液相色谱仪期间核查方法研究     

胡大方  王海波 《中国兽药杂志》2005,39(11):14-15

高效液相色谱仪做为强制检定仪器除按规定定期送法定检定机构进行检定外,在两次检定周期之间还需对使用频率高的仪器进行期间核查以维持设备校准状态的可信度.本文简述了期间核查的项目和方法,包括外观检查、输液系统检查、色谱柱和检测器性能检查及做好检查和处理结果的记录.  相似文献   

Application of platelet-rich plasma in the in vitro production of bovine embryos     

Ramos-Deus  Pamela  Santos Nascimento  Pábola  Vieira  Joane Isis Travassos  Chaves  Maiana Silva  Albuquerque  Karoline Antunes  Ferreira-Silva  José Carlos  Grázia  João Grabriel Viana  Santos Filho  Antonio Santana  Batista  André Mariano  Teixeira  Valéria Wanderley  Oliveira  Marcos Antonio Lemos 《Tropical animal health and production》2020,52(6):2931-2936

Tropical Animal Health and Production - The aim of this study was to replace fetal bovine serum (FBS) with platelet-rich plasma (PRP) for in vitro production of bovine embryos. The maturation media...  相似文献   

Pregnancy loss due to amnionitis in anglo-arabian mare—Case report     

Isabela Campos  Barbara Batista  Ana Carina Matos  Fernanda Dutra  Gustavo Gomes  Aline Pinna  Juliana Leite  Ana Ferreira 《Reproduction in domestic animals》2020,55(4):438-441

The amnion is a layer of the foetal membrane that has mechanical protection function and allows expansion and growth. The diseases that affect amnion have rarely been reported in horses. Amnionitis and funiculitis have been implicated as components of abortions as observed in abortions caused by the mare reproductive loss syndrome. Here, we report an abortion at 240-day gestation of a 7-year-old Anglo-Arabian mare with a history of previous stillbirth. Blood samples from both mare and foetus were collected for serological testing. Fragments from the placenta were taken for macroscopic and histopathological examinations. The results of these tests ruled out leptospirosis and concluded that the cause of the abortion was non-infectious chronic amnionitis. Moreover, the decreased vascularization in the placenta was consistent with placental insufficiency. This case highlights the importance of monthly ultrasound monitoring in equine pregnancy in order to diagnose placental insufficiency. The study also confirmed the efficiency of the histopathological examination for the definitive diagnosis of placental inflammation and for the study of foetal vascularization to rule out placental insufficiency in equine reproduction.  相似文献   

Plasma Antimullerian Hormone as a Predictor of Ovarian Antral Follicular Population in Bos indicus (Nelore) and Bos taurus (Holstein) Heifers     

EOS Batista  GG Macedo  RV Sala  MDDV Ortolan  MF Sá Filho  TA Del Valle  EF Jesus  RNVR Lopes  FP Rennó  PS Baruselli 《Reproduction in domestic animals》2014,49(3):448-452

In Bos taurus cattle, antimullerian hormone (AMH) has been demonstrated to have a high degree of correlation with ovarian antral follicle count and the number of healthy follicles and oocytes. To document the correlation between the plasma concentration of AMH and follicular number in Bos indicus and Bos taurus heifers, Nelore (Bos indicus, n = 16) and Holstein heifers (Bos taurus, n = 16) had their ovarian follicular waves synchronized. After synchronization, ovarian antral follicular population (AFP) was evaluated three times at 60‐day (d) intervals (T‐120 d, 120 days before plasma AMH determination; T‐60 d, 60 days before; and T0, at the time of plasma AMH determination). The plasma AMH concentration was positively correlated with the number of ovarian follicles on the day of the follicular wave emergence in Bos indicus (Nelore) and Bos taurus (Holstein) heifers at each evaluation time (p < 0.05). The AFP was higher in Bos indicus (Nelore) than in Bos taurus (Holstein) heifers (p < 0.05). Similarly, the AMH concentration was higher in Bos indicus (Nelore) than in Bos taurus (Holstein) heifers (p < 0.0001). When heifers were classified as to present high or low AFP according to the mean of the AFP within each genetic group, high‐AFP heifers presented a greater (p < 0.0001) AMH concentration than low‐AFP heifers, regardless of the genetic group. In conclusion, the AFP is positively correlated with plasma AMH concentration in both Bos indicus (Nelore) and Bos taurus (Holstein) heifers. Furthermore, Bos indicus (Nelore) heifers presented both greater plasma AMH concentrations and AFP than Bos taurus (Holstein) heifers.  相似文献   

Thermally Switchable Periodicities and Diffraction from Mesoscopically Ordered Materials     

JM Weissman  HB Sunkara  AS Tse  SA Asher 《Science (New York, N.Y.)》1996,274(5289):959-960

Two switchable, mesoscopically periodic materials were created by combining crystalline colloidal array (CCA) self-assembly with the temperature-induced volume phase transition of poly(N-isopropylacrylamide) (PNIPAM). Body-centered-cubic CCAs of hydrated, swollen PNIPAM particles Bragg-diffract infrared, visible, and ultraviolet light weakly, whereas arrays of compact shrunken particles diffract efficiently. A tunable diffracting array was also created by embedding a CCA of polystyrene spheres within a PNIPAM hydrogel that swells and contracts with temperature; thus the array lattice constant varies with temperature, and the diffracted wavelength was thermally tunable across the entire visible spectrum. These materials may find applications in many areas of optics and materials science.  相似文献   

Effects of cooking temperature on technological properties and in vitro digestibility of quick-cooking black and brown rice     

Cristian de Souza Batista  Caroline L. Dittgen  Igor da Silva Lindemann  Ya-Jane Wang  Moacir C. Elias  Nathan L. Vanier  Rosana Colussi 《Cereal Chemistry》2024,101(3):654-667

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Diallel analysis for morphoagronomic descriptors in Physalis angulata L. hybrids     

de Souza Farias  Jos&#; Williano  Orella  Jonathan Said Tejeda  dos Santos Batista  Edgar  Cordeiro  Rafael Cruz  Passos  Adriana Rodrigues  Silva  Luiz Cl&#;udio Costa 《Genetic Resources and Crop Evolution》2022,69(3):1365-1374

Genetic Resources and Crop Evolution - Physalis angulata L. is an American species with edible fruits that stands out for having high nutritional and pharmaceutical value. The species is found in...  相似文献