Phytoplankton community structure and the drawdown of nutrients and CO2 in the southern ocean     

KR Arrigo  DH Robinson  DL Worthen  RB Dunbar  GR DiTullio  M VanWoert  MP Lizotte 《Science (New York, N.Y.)》1999,283(5400):365-367

Data from recent oceanographic cruises show that phytoplankton community structure in the Ross Sea is related to mixed layer depth. Diatoms dominate in highly stratified waters, whereas Phaeocystis antarctica assemblages dominate where waters are more deeply mixed. The drawdown of both carbon dioxide (CO2) and nitrate per mole of phosphate and the rate of new production by diatoms are much lower than that measured for P. antarctica. Consequently, the capacity of the biological community to draw down atmospheric CO2 and transport it to the deep ocean could diminish dramatically if predicted increases in upper ocean stratification due to climate warming should occur.  相似文献   

Causes of death in sheep exported live by sea     

RB RICHARDS  RT NORRIS  RH DUNLOP  NC McQUADE 《Australian veterinary journal》1989,66(2):33-38

Post-mortem examinations were conducted on 950 dead and terminally ill sheep during assembly for export and during transport by sea from Fremantle, Western Australia to various Middle East ports. Causes of death were grouped into 5 major categories; inanition (deaths associated with reduced feed intake, including hypocalcaemia and hypomagnesaemia), salmonellosis (enteric and septicaemic), trauma, diseases associated with excessive feed intake (lactic acidosis and enterotoxaemia) and miscellaneous diseases (mostly of farm origin). During assembly the causes of death were salmonellosis 53.4%, miscellaneous diseases 23.8%, trauma 12.6%, inanition 10.2%, acidosis 3.9%, enterotoxaemia 3.4% and no diagnosis was made in 3.4%. During shipping the causes of death in defined populations of sheep in 5 voyages were; inanition 43.4%, salmonellosis 20.2%, trauma 10.6%, miscellaneous diseases 5.9%, enterotoxaemia 1.0% and no diagnosis was made in 19.0%. The range of mortality rates per 10,000 sheep at risk for the first 11 days at sea in 5 voyages were inanition 52.6 to 76.7, salmonellosis 7.8 to 109.8, trauma 2.1 to 17.1, miscellaneous diseases 5.9 to 17.1 and enterotoxaemia nil to 10.3.  相似文献   

Naturally occurring Eperythrozoon ovis infection in sheep reduces wool production     

MJ KABAY  FM SUNDERMAN  RB RICHARDS  TM ELLIS 《Australian veterinary journal》1992,69(9):232-232

  相似文献   

Detection of antibodies to West Nile virus in equine sera using microsphere immunoassay.     

Udeni B R Balasuriya  Pei-Yong Shi  Susan J Wong  Valerie L Demarest  Ian A Gardner  Pamela J Hullinger  Gregory L Ferraro  Joshua D Boone  Casey L De Cino  Amy L Glaser  Randall W Renshaw  Michel Ledizet  Raymond A Koski  N James MacLachlan 《Journal of veterinary diagnostic investigation》2006,18(4):392-395

One hundred and ninety-one sera from horses that recently were exposed to West Nile virus (WNV) by either vaccination or natural infection or that were not vaccinated and remained free of infection were used to evaluate fluorescent microsphere immunoassays (MIAs) incorporating recombinant WNV envelope protein (rE) and recombinant nonstructural proteins (rNS1, rNS3, and rNS5) for detection of equine antibodies to WNV. The rE MIA had a diagnostic sensitivity and specificity, respectively, of 99.3% and 97.4% for detection of WNV antibodies in the serum of horses that were recently vaccinated or naturally infected with WNV, as compared to the plaque reduction neutralization test (PRNT). The positive rE MIA results were assumed to be WNV-specific because of the close agreement between this assay and the PRNT and the fact that unvaccinated control horses included in this study were confirmed to be free of exposure to the related St Louis encephalitis virus. The NS protein-based MIA were all less sensitive than either the rE MIA or PRNT (sensitivity 0-48.0), although the rNSI MIA distinguished horses vaccinated with the recombinant WNV vaccine from those that were immunized with the inactivated WNV vaccine (P < 0.0001) or naturally infected with WNV (P < 0.0001). The rE MIA would appear to provide a rapid, convenient, inexpensive, and accurate test for the screening of equine sera for the presence of antibodies to WNV.  相似文献   

Numbers and percent of T lymphocytes in bovine peripheral blood during the periparturient period.     

J A Harp  M E Kehrli  D J Hurley  R A Wilson  T C Boone 《Veterinary immunology and immunopathology》1991,28(1):29-35

To determine if periparturient immunosuppression in dairy cattle might be due to an alteration in total numbers of percent of T lymphocytes, we examined the numbers and percent of T lymphocyte subsets in peripheral blood from periparturient dairy cows, some of which received recombinant bovine granulocyte colony stimulating factor (rbG-CSF) during the study. Beginning 2 weeks preparatum through 4 weeks postpartum, peripheral blood mononuclear cells (PBMC) were collected and labeled with monoclonal antibodies to BoCD5, BoCD4, and BoCD8, and the percent of cells positive for each marker measured by flow cytometry. The percent of PBMC expressing BoCD5 (total T cells), and BoCD8 (T suppressor/cytotoxic cells) was not significantly different between the groups, or at different times before and after calving. The percent of PBMC expressing BoCD4 (T helper cells) was not significantly different between the groups, however, within both groups there was a higher percent of BoCD4+ cells after calving than during the prepartum period. In cows receiving rbG-CSF, total numbers of PBMC were significantly increased compared to controls during the postpartum treatment period.  相似文献   

Bone marrow aspirate from a dog with anemia and thrombocytopenia     

Boone L  Radlinsky M 《Veterinary clinical pathology / American Society for Veterinary Clinical Pathology》2000,29(2):59-61

  相似文献   

Comparison of Tensile Strength and Early Healing of Acute Repeat Celiotomy Through a Ventral Median or a Right Ventral Paramedian Approach     

Lindsey Helms Boone DVM  PhD  Kira Epstein DMV  Diplomate ACVS & ACVECC  Jeanette Cremer Dr. Med. Vet  Diplomate ACVA  Andrew Rogers BS  Tim Foutz PhD  Jane Quandt DVM  Diplomate ACVA & ACVECC  Elizabeth Howerth DVM  PhD  Diplomate ACVP  P.O. Eric Mueller DVM  PhD  Diplomate ACVS 《Veterinary surgery : VS》2014,43(6):741-749

  相似文献   

High-quality binary protein interaction map of the yeast interactome network   总被引：1，自引：0，他引：1  

Yu H  Braun P  Yildirim MA  Lemmens I  Venkatesan K  Sahalie J  Hirozane-Kishikawa T  Gebreab F  Li N  Simonis N  Hao T  Rual JF  Dricot A  Vazquez A  Murray RR  Simon C  Tardivo L  Tam S  Svrzikapa N  Fan C  de Smet AS  Motyl A  Hudson ME  Park J  Xin X  Cusick ME  Moore T  Boone C  Snyder M  Roth FP  Barabási AL  Tavernier J  Hill DE  Vidal M 《Science (New York, N.Y.)》2008,322(5898):104-110

Current yeast interactome network maps contain several hundred molecular complexes with limited and somewhat controversial representation of direct binary interactions. We carried out a comparative quality assessment of current yeast interactome data sets, demonstrating that high-throughput yeast two-hybrid (Y2H) screening provides high-quality binary interaction information. Because a large fraction of the yeast binary interactome remains to be mapped, we developed an empirically controlled mapping framework to produce a "second-generation" high-quality, high-throughput Y2H data set covering approximately 20% of all yeast binary interactions. Both Y2H and affinity purification followed by mass spectrometry (AP/MS) data are of equally high quality but of a fundamentally different and complementary nature, resulting in networks with different topological and biological properties. Compared to co-complex interactome models, this binary map is enriched for transient signaling interactions and intercomplex connections with a highly significant clustering between essential proteins. Rather than correlating with essentiality, protein connectivity correlates with genetic pleiotropy.  相似文献   

Investigation of Johne's disease in Tasmanian fallow deer (Dama dama)     

RB Jackson  DJ Kennedy  ESG Sergeant 《Australian veterinary journal》2021,99(1-2):44-45

In 2012 when many sheep flocks in northern‐central Tasmania were experiencing a high prevalence of ovine Johne's disease, 34 wild adult fallow deer shot on or near infected properties were negative to microscopic Mptb lesions of the ileo‐caecal valve, terminal ileum and ileo‐caecal lymph nodes. This study demonstrated 95% confidence of detecting Johne's disease in this fallow deer population if ≥10% of animals were shedding Mycobacterium avium subsp. paratuberculosis in their faeces, or if ≥21% of animals were sub‐clinically infected.  相似文献   

The Effect of Inter-row Cultivation on Yield of Weed-free Maize   总被引：1，自引：0，他引：1  

H. M. G. van der  Werf  J. J. Klooster    D. A. van der  Schans  F. R. Boone  B. W. Veen 《Journal of Agronomy and Crop Science》1991,166(4):249-258

Inter-row cultivation can be a means to reduce herbicide use in maize ( Zea mays L.) production. Apart from its effect on weeds, inter-row tillage may increase available water and nitrogen in the soil, affect soil temperature and damage crop roots. In 10 out of 13 field experiments conducted in the Netherlands from 1977 to 1985, 4- to 7-cm deep inter-row cultivation of a weed-free maize crop did not significantly affect whole plant dry matter yield. In two experiments yield was increased with inter-row cultivation; in one experiment inter-row cultivation significantly decreased yield. These differences in crop response could not be attributed to factors known to affect crop response to inter-row cultivation such as slope, soil texture, precipitation or mean temperature. Ten-cm deep cultivation caused yield reduction, probably due to root damage.  相似文献