The Role of Clinical Trials in Veterinary Oncology     

Jenna Burton  Chand Khanna 《Veterinary Clinics of North America: Small Animal Practice》2014

  相似文献   

In situ stress testing to identify Australian black tiger prawns (Penaeus monodon) free of gill-associated virus and Mourilyan virus   总被引：1，自引：1，他引：0  

JA Cowley  GJ Coman  ML Salmon  ND Young  KV Rajendran  KJ Wilson  NP Preston 《Australian veterinary journal》2009,87(6):244-248

  相似文献   

Phosphatfraktionierung im Boden und isotopisch austauschbares Phosphat verschiedener Phosphatfraktionen     

P. K. Khanna  B. Ulrich 《植物养料与土壤学杂志》1967,117(1):53-64

  相似文献   

Carbon and nitrogen turnover in two acid forest soils of southeast Australia as affected by phosphorus addition and drying and rewetting cycles   总被引：5，自引：0，他引：5  

J. Bauhus  P. K. Khanna 《Biology and Fertility of Soils》1994,17(3):212-218

The effects of adding P and of drying and rewetting were studied in two acid forest soils from southeast Australia. The soils were a yellow podzolic with a low soil organic matter content (3.75% C) and a red earth with a high organic matter content (13.5% C). C and N mineralization and microbial C and N contents were investigated in a laboratory incubation for 151 days. Microbial C and N were estimated by a hexanol fumigation-extraction technique. Microbial C was also determined by substrate-induced respiration combined with a selective inhibition technique to separate the fungal and the bacterial biomass. The results obtained by the selective inhibition technique were not conclusive. Adding P to the soil and drying and rewetting the soil reduced microbial N. This effect was more pronounced in rapidly and frequently dried soils. Microbial C was generally less affected by these treatments. Compared with the control, the addition of P caused a reduction in respiration in the red earth (-13%) but an increase in the yellow podzolic soil (+12%). In the red earth net N mineralization was highest following the addition of P. In the yellow podzolic soil highest N mineralization rates were obtained when the soil was subjected to drying and rewetting cycles. In both soils increased N mineralization was associated with a decrease in microbial N, indicating that the mineralized N was of microbial origin. Nitrification decreased with rapid drying and rewetting. The addition of P promoted heterotrophic nitrification in both soils.  相似文献   

Behavior of manganese in some acid soils in Western Germany in relation to pH and air-drying     

P.K. Khanna  B. Mishra   《Geoderma》1978,20(3-4):289-297

The relationships of pH to Mn concentrations in equilibrium soil solutions of strongly acid soils (pH < 4.5) were studied. The values of Mn concentrations did not conform to the solubility relationships of MnO₂, Mn₂O₃ or Mn(OH)₃. On the othr hand, a significant relationship between pMn and exchangeable Mn (r = 0.636^**, N =43) was observed. This suggest that the levels of Mn in solution are primarily controlled by exchangeable Mn in response to pH changes.

Mineral soil samples when air-dried showed a 1.5 to more than 8-fold increase in amounts of NH₄Cl-extractable Mn. This increase was not observed in soil samples rich in organic matter (> 5% organic carbon), thus excluding the possibility of release of Mn from the organic fraction of the soil. The increase is considered a consequence of increased solubility of Mn-oxides.  相似文献   

Summary of the first round analyses of the Third International Workshop on Swine Leukocyte Differentiation Antigens.     

K Haverson  A Saalmüller  Z Chen  C A Huang  A Simon  J Seebach  W J Boersma  R Zwart  T A Niewold  E Thacker  D Llanes  J M de la Lastra  H Engelhardt  A Ezquerra  F Alonso  J Dominguez  J A Ledbetter  L Grosmaire  R Lee  J Nielsen  H Salmon  I Valpotic  L Sver  G Lackovic  A Summerfield  K V Khanna 《Veterinary immunology and immunopathology》2001,80(1-2):25-34

The reactivity of 155 monoclonal antibodies submitted to the Third International Workshop on Swine Leukocyte Differentiation Antigens, together with 41 internal standards, was analysed by flow cytometry on 29 different pig cell targets as well as two human cell targets as a means of establishing suitable panels of monoclonal antibodies for more detailed clustering analyses by the various subsections of the workshop. Results were collected either without further gating, with gating based on FS/SS characteristics or with gating based on the co-expression of a reference antibody in two-colour flow cytometry. The CD or SWC reactivity of the internal standards had been established in previous workshops. Data sets were subsequently analysed by statistical clustering using the Leucocyte Typing Database IV software. The resulting 18 cluster groups were allocated to the appropriate second round sections of the workshop, after reviewing the overall cellular reactivity of each cluster as well as the specificity of known standards which clustered in a group.  相似文献   

Designing sustainable agriculture education: Academics’ suggestions for an undergraduate curriculum at a land grant university     

Damian M. Parr  Cary J. Trexler  Navina R. Khanna  Bryce T. Battisti 《Agriculture and Human Values》2007,24(4):523-533

Historically, land grant universities and their colleges of agriculture have been discipline driven in both their curricula and research agendas. Critics call for interdisciplinary approaches to undergraduate curriculum. Concomitantly, sustainable agriculture (SA) education is beginning to emerge as a way to address many complex social and environmental problems. University of California at Davis faculty, staff, and students are developing an undergraduate SA major. To inform this process, a web-based Delphi survey of academics working in fields related to SA was conducted. Faculty from colleges and universities across the US were surveyed. Participants suggested that students needed knowledge of natural and social science disciplines relating to the agri-food system. In addition, stakeholders suggested students learn through experiences that link the classroom to field work, engaging a broad range of actors within applied settings. Stakeholders also emphasized the need for interdisciplinary and applied scholarship. Additionally, they proposed a range of teaching and learning approaches, including many practical experiences. Given the diverse suggestions of content knowledge and means of producing knowledge, the survey presented unique challenges and called into question the epistemological and pedagogical norms currently found in land grant colleges of agriculture. This study has implications for land grant universities seeking to develop undergraduate curriculum appropriate to the field of SA. Damian M. Parr is a doctoral student of Agricultural and Environmental Education, in the School of Education at the University of California at Davis. His professional interests include organic farming, sustainable agriculture, experiential and transformational learning, critical pedagogy, and participatory action research. He is currently working on linking on-campus student initiated sustainable farm and food systems projects to curricula at land grant universities Cary J. Trexler is an assistant professor of Agricultural and Environmental Education at the University of California at Davis where he teaches courses in the history of agricultural education, experiential learning, and research methods for practicing teachers. His research focuses on experiential learning, sustainable agriculture education, and needs of teachers and informal educators within the context of the agri-food system Navina R. Khanna is a graduate student pursuing an MS in International Agricultural Development at the University of California at Davis. She is committed to facilitating community dialogue and education about sustainability issues. Her work at the university focuses on the process and goal of sustainability in agricultural education and campus food system sustainability. Her primary professional interests include democratic participatory process in agri-food system sustainability and urban revitalization Bryce T. Battisti is a doctoral student of Agricultural and Environmental Education, in the School of Education at the University of California at Davis. His research interests include the development of alternative models for university education that are founded on student-centered experiential learning. Specifically, he studies models of permaculture education that lead toward accredited degrees and relates these models to sustainable agriculture degree programs  相似文献   

Off-Resonance Conduction Through Atomic Wires     

A Yazdani  DM Eigler  ND Lang 《Science (New York, N.Y.)》1996,272(5270):1921-1924

The electrical resistance of wires consisting of either a single xenon atom or two xenon atoms in series was measured and calculated on the basis of an atom-jellium model. Both the measurement and the calculation yielded a resistance of 10(5) ohms for the single-xenon atom system and 10(7) ohms for the two-xenon atom system. These resistances greatly exceeded the 12,900-ohm resistance of an ideal one-dimensional conduction channel because conduction through the xenon atoms occurs through the tail of the xenon 6s resonance, which lies far above the Fermi level. This conduction process in an atom-sized system can now be understood in terms of the electronic states of individual atoms.  相似文献   

Formation of Al13I-: evidence for the superhalogen character of Al13     

Bergeron DE  Castleman AW  Morisato T  Khanna SN 《Science (New York, N.Y.)》2004,304(5667):84-87

Al13- is a cluster known for the pronounced stability that arises from coincident closures of its geometric and electronic shells. We present experimental evidence for a very stable cluster corresponding to Al13I-. Ab initio calculations show that the cluster features a structurally unperturbed Al13- core and a region of high charge density on the aluminum vertex opposite from the iodine atom. This ionically bound magic cluster can be understood by considering that Al13 has an electronic structure reminiscent of a halogen atom. Comparisons to polyhalides provide a sound explanation for our chemical observations.  相似文献   

Pyrazole and induction of fatty liver by a single dose of ethanol   总被引：2，自引：0，他引：2  

G O Bustos  H Kalant  J M Khanna  J Loth 《Science (New York, N.Y.)》1970,168(939):1598-1599

Pyrazole (4 millimoles per kilogram or 272 milligrams per kilogram of body weight), given to fasted rats 10 minutes before gavage with ethanol (4 grams per kilogram), completely prevented both the disappearance of ethanol from the blood over a 16-hour period and the ethanol-induced reduction in the ratio of oxidized to reduced hepatic nicotinamide-adenine dinucleotide. However, it did not affect the accumulation of triglycerides in the liver after the administration of ethanol. These results indicate that metabolism of ethanol is not required for production of fatty liver by a single, large dose of ethanol.  相似文献