A review of cases submitted to Murdoch University for immunodiagnostic testing: 1978–1989     

WJ PENHALE  MJ DAY†  AD LINES  RP McKENNA 《Australian veterinary journal》1990,67(4):148-149

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A method of investigating the effect of droplet size on pesticide collection by vegetation     

Andreas Dubs  Lynda G. Dove  Philip M. Symmons 《Pest management science》1985,16(3):217-226

A new technique is described which allows an estimation of the relative collection of insecticide on a crop, for three discrete droplet sizes simultaneously. Three droplet clouds, each consisting of a different chemical, were released along a line perpendicular to the wind. Subsequent chemical analysis of vegetation samples showed the relative efficiency of capture by any part of the plant as a function of the droplet size. The target vegetation and the micrometeorological conditions were the same for all three droplet clouds and thus did not mask the effects of droplet size. Initial results for a young crop of irrigated cotton are presented. The downwind distributions of chemical residues were in good agreement with a theoretical model published by Bache and Sayer.  相似文献   

Pathological findings in the bulbourethral glands of bulls     

CM CAMPERO  PW LADDS  AD THOMAS† 《Australian veterinary journal》1988,65(8):241-244

The bulbourethral glands of 323 Bos indicus or B. indicus crossbred bulls more than 1 1/2 years old were examined in an abattoir study. Bulbourethral adenitis was diagnosed grossly and confirmed by histological examination in 4 (1.2%). Unilateral chronic interstitial inflammation was seen in 2 cases; one of these was associated with a degenerative-type seminal vesiculitis. In the others adenitis was bilateral; in one case it was associated with a concretion and foreign (plant) material in the principal duct of the left bulbourethral gland; in the other bilateral case, numerous calculi were present and microscopically, a chronic active and diffuse inflammation was observed. Chemical analysis of the calculi showed calcium oxalate and tricalcium phosphate to be the most important components. Corynebacterium spp was isolated from the lesion with multiple calculi but attempts to isolate Chlamydia spp, Mycoplasma spp and Brucella abortus from the 4 adenitis cases were unsuccessful. Congenital abnormalities such as glandular fusion (2.2%) or unilateral aplasia (0.6%) were also observed. Cysts were the most common finding (19.2%), and duct dilation was frequent (7.1%). The significance of these findings in relation to fertility is considered.  相似文献   

The theory of social forestry intervention: the state of the art in Asia     

M. R. Dove 《Agroforestry Systems》1995,30(3):315-340

This study focuses on the major issues in current thinking about the theory of social forestry development in Asia. The first of these issues concerns the cause of deforestation. The governmental view is that deforestation is a gradual process driven by community-based factors, whereas the community view is that deforestation is a stochastic process driven by external, political-economic factors. The two explanations have different implications for where the problematique of social forestry is located — in the forest community or in the forest agency — and how, therefore, it is to be addressed.A second issue concerns how and when social forestry interventions are carried out. The concept of a window-of-opportunity for intervention reflects a widespread belief that it is importantwhen interventions are carried out — with both the costs and benefits of intervention increasing as it is timed earlier and decreasing as it is timed later. A key determinant of the best time for intervention is the receptivity of the forest agency and the broader society. The purpose of intervention is to strengthen receptivity and other factors conducive to change, to hasten extant processes of change, and to minimize the possibility of a reversal of direction.A third issue is whether the focus of social forestry intervention should be on state lands or on community lands. While there are logical reasons for either foci, the continuing vacillation between them suggests the lack of a theoretical perspective with sufficient breadth to encompass them both. Whatever the focus, attitudinal change within the forest agency is usually mandated in social forestry interventions, but it is rarely accompanied with intervention in the underlying power relations, reflecting a continuing difficulty in viewing the forest agency sociologically. This lack of sociological perspective also is seen in the tendency to focus on adding resources perceived to be in short supply, instead of removing institutional obstacles —including those within the forest agency — to the proper use of existing resources.The final issue involves the unintended consequences of social forestry intervention. These include redirection of the intervention as a result of bureaucratic resistance or negative feedback, and secondary consequences stemming from the dynamic responses by forests, forest communities, and forest agencies to changes in their relationship.  相似文献   

The first reported case of equine Nocardioform placentitis in New Zealand     

DW Hanlon  AD McLachlan  I Gibson 《New Zealand veterinary journal》2016,64(3):198-199

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Variability in mixing efficiency and laboratory analyses of a common diet mixed at 25 experiment stations     

Cromwell GL  Brendemuhl JH  Chiba LI  Cline TR  Crenshaw TD  Dove CR  Easter RA  Ewan RC  Ferrell KC  Hamilton CR  Hill GM  Hitchcock JD  Knabe DA  Kornegay ET  Lewis AJ  Libal GW  Lindemann MD  Mahan DC  Maxwell CV  McConnell JC  Nelssen JL  Pettigrew JE  Southern LL  Veum TL  Yen JT;North Central Region Committee on Swine Nutrition 《Journal of animal science》2003,81(2):484-491

An experiment involving 25 experiment stations in the North Central and Southern regions (NCR-42 and S-288, respectively) was conducted to assess the degree of uniformity of diet mixing among stations and to assess the variability among station laboratories in chemical analysis of mixed diets. A fortified corn-soybean meal diet was mixed at each station using a common diet formula (except for vitamin and trace-mineral additions). The diet was calculated to contain 14% crude protein (CP), 0.65% Ca, 0.50% P, and 125 ppm Zn (based on 100 ppm added Zn). After mixing, samples were collected from the initial 5% of feed discharged from the mixer, after 25, 50, and 75% was discharged, and from the final 5% of discharged feed. The five samples were sent to the University of Kentucky, finely ground, and divided into subsamples. Each set of five subsamples from each station was distributed to three randomly selected stations for analysis of CP, Ca, P, and Zn (i.e., each station analyzed five diet sub-samples from three other stations). In addition, two commercial and two station laboratories analyzed composites of the five subsamples from each of the 25 mixed diets. Based on the laboratories that analyzed all diets, means were 13.5, 0.65, and 0.52%, and 115 ppm for CP, Ca, P, and Zn, respectively. Ranges of 11.8 to 14.6% CP, 0.52 to 0.85% Ca, 0.47 to 0.58% P, and 71 to 182 ppm of Zn were found among the 25 diet mixes. The coefficients of variation among the 25 diet samples for CP, Ca, P, and Zn were 4.3, 9.3, 4.1, and 17.4%, and among the 25 laboratories were 3.6, 12.5, 10.7, and 11.1%, respectively. Overall analyses of the five sub samples were, respectively, CP: 13.4, 13.6, 13.4, 13.5, and 13.4% (P < 0.06); Ca: 0.66, 0.67, 0.67, 0.66, and 0.67%; P: 0.50,0.51,0.51,0.50, and 0.50%; and Zn: 115, 116, 112, 113, and 120 ppm (P < 0.001). Diets were not uniformly mixed at all stations (station x sample No. was P < 0.08 for Ca and P < 0.01 for CP, P, and Zn). Among stations, the range of the five samples, expressed as a percentage of the mean and averaged for CP, Ca, P, and Zn, varied from +/- 1.1% (i.e., 98.9 to 101.0%) to +/- 12.9% (84.6 to 110.4%), with an overall average of +/- 5.2%. Neither type nor volume of mixers was related to mixing uniformity. The results suggest that uniformity of diet mixes varies among experiment stations, that some stations miss their targeted levels of nutrients (especially Zn), and that the variability among experiment station laboratories in analysis of dietary Ca, P, and Zn in mixed diets is quite large.  相似文献   

Cyanobacterium Cylindro-spermopsis raciborskii as a probable cause of death in cattle in northern Queensland     

AD THOMAS  ML SAKER  JH NORTON  RD OLSEN 《Australian veterinary journal》1998,76(9):592-594

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Calves Born after Direct Transfer of Vitrified Bovine In Vitro-produced Blastocysts Derived from Vitrified Immature Oocytes     

AD Vieira  F Forell  C Feltrin  JL Rodrigues 《Reproduction in domestic animals》2008,43(3):314-318

Vitrification has been the method of choice for the cryopreservation of bovine oocytes, as rapid cooling decreases chilling sensitivity. The aim of this study was to determine the in vitro and in vivo survival and the viability of immature oocytes vitrified using super‐cooled liquid nitrogen. Immature oocytes were randomly allocated to three groups: (i) non‐vitrified control group, (ii) vitrified in normal (?196°C) liquid nitrogen (LN₂) and (iii) vitrified in super‐cooled LN₂ (≤?200°C). Open‐pulled glass micropipettes were used as vitrification containers. Immature oocytes were in vitro‐matured, fertilized and cultured to the blastocyst stage. In vitro viability was assessed by cleavage and blastocyst rates on days 2 and 7 of culture respectively. Vitrified blastocysts derived from the immature vitrified oocytes were directly transferred to synchronous recipients. The in vitro embryo development of vitrified immature oocytes was not influenced by the LN₂ state. After direct transfer (one embryo per recipient) of 16 embryos obtained from immature vitrified oocytes (eight from each vitrified group), two healthy calves were born in each group. These results indicated that vitrification of immature bovine oocytes using glass micropipettes under normal or super‐cooled LN₂, resulted in viable blastocysts and live calves following in vitro embryo production.  相似文献   

Carcinogen in rock fern (Cheilanthes sieberi) from New Zealand and Australia     

BL SMITH  PP EMBLING  DR LAUREN  MP AGNEW  AD ROSS  PL GREENTREE 《Australian veterinary journal》1989,66(5):154-155

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Identification of pestivirus carrier calves by an antigen-capture ELISA     

AD SHANNON  SG MACKINTOSH  PD KIRKLAND 《Australian veterinary journal》1993,70(2):74-76

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