Sphingolipid and other constituents from almond nuts (Prunus amygdalus Batsch)   总被引：3，自引：0，他引：3  

Sang S  Kikuzaki H  Lapsley K  Rosen RT  Nakatani N  Ho CT 《Journal of agricultural and food chemistry》2002,50(16):4709-4712

One sphingolipid, 1-O-beta-D-glucopyranosyl-(2S,3R,4E,8Z)-2-[(2R)-2-hydroxyhexadecanoylamino]-4,8-octadecadiene-1,3-diol, and four other constituents, beta-sitosterol, daucosterol, uridine, and adenosine, have been isolated from the nuts of almond (Prunus amygdalus). Complete assignments of the proton and carbon chemical shifts for the sphingolipid were accomplished on the basis of high-resolution 1D and 2D NMR data. All of these compounds are being reported from almond nuts (P. amygdalus)for the first time.  相似文献   

Herbicidal Activity of Stylosanthes guianensis and its Phytotoxic Components     

T. D. Khanh  N. H. Hong  D. Q. Nhan  S. L. Kim  I. M. Chung  T. D. Xuan 《Journal of Agronomy and Crop Science》2006,192(6):427-433

Stylosanthes guianensis is a popular pasture legume and cover crop. The legume possessed strong allelopathic potential and suppressed spontaneous growth of paddy weeds. In a bioassay, aqueous extract of S. guianensis remarkably inhibited germination and growth of barnyardgrass and monochoria. Application of 1 ton ha^?1 upland parts of S. guianensis significantly reduced paddy weed biomass by 80 % and increased rice yield by 40 % when compared with the control. Gas chromatography‐mass spectrometry analysis reveals the presence of several allelochemicals in S. guianensis including phenolic acids, coumarin and long‐chain fatty acids. Stylosanthes guianensis may be used as a source of natural herbicide for reducing the dependency on synthetic herbicides in agricultural production.  相似文献   

Changes in the phenotype for halothane sensitivity in pigsChangement du phénotype de sensibilité, à l'halothane chez le porcPhänotypische veränderungen in der empfindlichkeit auf halothan bei schweinen     

J Pazdera  J Hyánek  V Hruban  J Hradecký  B Gahne 《Livestock Production Science》1983,10(4):365-371

One hundred-and-one hybrids of the Canadian Landrace, Large White, Belgian Landrace and Duroc breeds were repeatedly tested for sensitivity to halothane at the age of 8–15 weeks. Changes in the number of reactors were recorded in the experiment. The number of reactors was 40 in the first test, 33 in the second and 30 in the third. Two individuals changed from non-reactors to reactors; 12 reactors assessed by the standard halothane test ceased to differ during repeated tests from non-reactors. However, these individuals with secondary non-reactivity transmitted halothane-sensitivity to the progeny.  相似文献   

The normal response to repetitive motor nerve stimulation in dogs     

R. Malik  S. Ho  D. B. Church 《The Journal of small animal practice》1989,30(1):20-26

The responses of certain muscles to stimulation at different frequencies has been studied in normal dogs. Repetitive stimulation at 10 and 20 Hz resulted in a smooth, progressive decremental response when the compound muscle action potential (CMAP) was recorded from the plantar, and to a lesser extent the palmar, interosseous muscles. In contrast, there was a slight incremental response when the CMAP was recorded from the cranial tibial muscle. Studies using a competitive neuromuscular blocking agent have suggested that the plantar interosseous muscles have a greater proportion of low efficacy synapses in comparison with the other muscles studied. The cranial tibial muscle may therefore be more suitable for assessing neuromuscular transmission than the distal limb muscles.  相似文献   

Effects of beta-glucanase-producing Lactobacillus strains on growth, dry matter and crude protein digestibilities and apparent metabolisable energy in broiler chickens     

Sieo CC  Abdullah N  Tan WS  Ho YW 《British poultry science》2005,46(3):333-339

The effects of beta-glucanase expressed by transformed Lactobacillus strains on growth performance, apparent digestibilities of dry matter and crude protein, and apparent metabolisable energy were studied. Two hundred and forty 1-d-old chicks (Avian-43) were randomly divided into three dietary treatment groups and fed with the following diets: (i) basal diet (control) (BD); (ii) basal diet with parental Lactobacillus strains (BDP) and (iii) basal diet with transformed Lactobacillus strains (BDT). At 21 d of age, the body weight, body weight gain and feed conversion ratio of the BDT-fed chickens were significantly improved. At 14 and 21 d of age, the proportions of dry matter in the duodenum, jejunum, ileum, caeca and excreta of chickens given the BDT diet were significantly higher than those of chickens given the BD and BDP diets. Apparent metabolisable energy, digestibilities of crude protein and dry matter were also significantly improved (by 3.5, 5.6 and 3.5%, respectively) by the BDT diet. These results showed that the transformed Lactobacillus strains improved digestibility as well as enhanced the growth performance of chickens.  相似文献   

Development of a genetically modified nontoxigenic Pasteurella multocida toxin as a candidate for use in vaccines against progressive atrophic rhinitis in pigs   总被引：1，自引：0，他引：1  

To H  Someno S  Nagai S 《American journal of veterinary research》2005,66(1):113-118

OBJECTIVE: To construct a genetically modified nontoxigenic Pasteurella multocida toxin (PMT) and examine its immunoprotective activity against challenge exposure with wild-type PMT in pigs. ANIMALS: 5 healthy pigs. PROCEDURE: A nontoxigenic PMT was created by replacing the serine at position 1164 with alanine (S1164A) and the cysteine at position 1165 with serine (C1165S). Toxic activity was determined by use of the guinea pig skin test and mouse lethality test. Three pigs were vaccinated twice with the modified PMT, and the remaining 2 pigs served as nonvaccinated control animals. Vaccinated and control pigs were challenge exposed with wild-type PMT. Pigs were euthanatized and necropsied on day 14 after challenge exposure. Turbinate atrophy was examined macroscopically and assigned a score. Serum anti-PMT antibodies were determined by use of an ELISA. RESULTS: The genetically modified PMT was characterized by a total lack of toxic activity. Pigs vaccinated with the modified PMT became seropositive; in contrast, control pigs remained seronegative. Necropsy revealed that the 2 control pigs had moderate and severe turbinate atrophy, respectively, whereas the 3 vaccinated pigs did not have any lesions in the turbinates or abnormalities in other organs. CONCLUSIONS AND CLINICAL RELEVANCE: Modification by use of S1164A and C1165S leads to a complete loss of toxic effects of PMT without impairment of the ability to induce protective immunity in pigs. Analysis of these results suggests that genetically modified PMT may represent a good candidate for use in developing a vaccine against progressive atrophic rhinitis in pigs.  相似文献   

A Case of Obstructive Uremia with an Unusual Cause          下载免费PDF全文

Ho CC  Hsu TS 《The Canadian veterinary journal. La revue veterinaire canadienne》1963,4(6):157-158,159

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Ethanol decreases the expression of pituitary adenylate cyclase activating polypeptide in rat testes   总被引：1，自引：0，他引：1  

Koh PO  Won CK  Ho JH 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2006,68(6):635-637

The present study was designed to evaluate the effect of ethanol on pituitary adenylate cyclase activating polypeptide (PACAP) expression in adult rat testes. Ethanol (3 g/kg i.p., 15% v/v in saline) was administrated to adult male rats for 10 days. Using northern blot analysis, we elucidated the decrease of PACAP mRNA in rat testes by ethanol administration. The level of PACAP mRNA was decreased by 46.5% in testes of the ethanol-treated animals, compared to that of saline-treated animals. In particular, ethanol exposure decreased the expression of PACAP mRNA and protein in developing germ cells, which are sperm cell progenitors. Thus, our findings suggest that the decrease of PACAP in developing germ cells by ethanol administration may contribute to the suppression of male reproductive activity.  相似文献   

The consensus coding sequences of human breast and colorectal cancers     

Sjöblom T  Jones S  Wood LD  Parsons DW  Lin J  Barber TD  Mandelker D  Leary RJ  Ptak J  Silliman N  Szabo S  Buckhaults P  Farrell C  Meeh P  Markowitz SD  Willis J  Dawson D  Willson JK  Gazdar AF  Hartigan J  Wu L  Liu C  Parmigiani G  Park BH  Bachman KE  Papadopoulos N  Vogelstein B  Kinzler KW  Velculescu VE 《Science (New York, N.Y.)》2006,314(5797):268-274

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Regulated virulence controls the ability of a pathogen to compete with the gut microbiota     

Kamada N  Kim YG  Sham HP  Vallance BA  Puente JL  Martens EC  Núñez G 《Science (New York, N.Y.)》2012,336(6086):1325-1329

The virulence mechanisms that allow pathogens to colonize the intestine remain unclear. Here, we show that germ-free animals are unable to eradicate Citrobacter rodentium, a model for human infections with attaching and effacing bacteria. Early in infection, virulence genes were expressed and required for pathogen growth in conventionally raised mice but not germ-free mice. Virulence gene expression was down-regulated during the late phase of infection, which led to relocation of the pathogen to the intestinal lumen where it was outcompeted by commensals. The ability of commensals to outcompete C. rodentium was determined, at least in part, by the capacity of the pathogen and commensals to grow on structurally similar carbohydrates. Thus, pathogen colonization is controlled by bacterial virulence and through competition with metabolically related commensals.  相似文献