Neuromorphology: the central nervous system of cartilaginous fishes     

Northcutt RG 《Science (New York, N.Y.)》1983,222(4620):156

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Body and Brain. A Trophic Theory of Neural Connections. Dale Purves. Harvard University Press, Cambridge, MA, 1988. viii, 231 pp., illus. $35     

Northcutt RG 《Science (New York, N.Y.)》1989,244(4907):993

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Attempted transmission of dermatophilosis in saltwater crocodiles (Crocodylus porosus)     

GN BUENVIAJE  PW LADDS  RG HIRST  PM SUMMERS  JM MILLAN 《Australian veterinary journal》1998,76(7):495-496

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Eye diseases in Siberian husky dogs     

RG STANLEY  JR BLOGG 《Australian veterinary journal》1991,68(5):161-162

A full ophthalmic examination was performed on 40 Siberian husky dogs using direct and indirect ophthalmoscopy, gonloscopy and nasolacrimal cannulation. Eight (20%) of the dogs were found to have distichia, 10 (25%) had excessive medial caruncular hairs, 8 (20%) had absence, displacement, or narrowing of the nasolacrimal puncta, 2 (5%) had bilateral corneal crystalline opacities, and 2 (5%) had unilateral areas of lateral corneal lipidosis. Fifty percent of the dogs had some abnormality of the iridocorneal (drainage) angle. However, in only one of these was the deformity severe enough to require glaucoma prophylaxis. An association between blue iris colour and malformation of the iridocorneal angle was noted.  相似文献   

"Coulomb Staircase" at Room Temperature in a Self-Assembled Molecular Nanostructure     

RP Andres  T Bein  M Dorogi  S Feng  JI Henderson  CP Kubiak  W Mahoney  RG Osifchin  R Reifenberger 《Science (New York, N.Y.)》1996,272(5266):1323-1325

Double-ended aryl dithiols [alpha,alpha'-xylyldithiol (XYL) and 4,4'-biphenyldithiol] formed self-assembled monolayers (SAMs) on gold(111) substrates and were used to tether nanometer-sized gold clusters deposited from a cluster beam. An ultrahigh-vacuum scanning tunneling microscope was used to image these nanostructures and to measure their current-voltage characteristics as a function of the separation between the probe tip and the metal cluster. At room temperature, when the tip was positioned over a cluster bonded to the XYL SAM, the current-voltage data showed "Coulomb staircase" behavior. These data are in good agreement with semiclassical predictions for correlated single-electron tunneling and permit estimation of the electrical resistance of a single XYL molecule (approximately18 ± 12 megohms).  相似文献   

Anatomical Evidence of Electroreception in the Coelacanth (Latimeria chalumnae)     

R. Glenn  Northcutt 《Anatomia, histologia, embryologia》1980,9(4):289-295

Serial sections of an immature female Latimeria brain were studied to describe the octavolateral area. Sections were stained with cresyl violet (for cell bodies) and with Klüver-Barrera method for myelinated fibers. The presence of a well-developed dorsal nucleus of the octavolateral area suggests that Latimeria probably possesses the electroceptive capacity with ampullary organs.  相似文献   

Cobalt accumulation in horses following repeated administration of cobalt chloride     

RG Wenzel  D Major  KF Hesp  E Hall  P Doble 《Australian veterinary journal》2019,97(11):465-472

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Ordering of ruthenium cluster carbonyls in mesoporous silica     

W Zhou  JM Thomas  DS Shephard  BFG Johnson  D Ozkaya  T Maschmeyer  RG Bell  Q Ge 《Science (New York, N.Y.)》1998,280(5364):705-708

The anionic ruthenium cluster carbonylates [Ru6C(CO)16]2- or [H2Ru10(CO)25]2- interspersed with bis(triphenylphosphino)iminium counterions (PPN+) are incorporated from solution into the pores of MCM-41 mesoporous silica (3 nanometers in diameter), where they form tightly packed arrays. These arrays were shown by high-resolution transmission electron microscopy, Fourier transform optical diffraction, and computer simulations to be well ordered both along and perpendicular to the axis of the cylindrical pores. In their denuded state produced by gentle thermolysis, the cluster carbonylates yield nanoparticles of ruthenium that are less well ordered than their assimilated precursors but show good activity as hydrogenation catalysts for hexene and cyclooctene. In both their as-prepared and denuded states, these encapsulated clusters are likely to exhibit interesting electronic and other properties.  相似文献   

Reply     

RG MARTIN 《Australian veterinary journal》1999,77(11):727-727

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Role of Fatty Acids in Energy Provision During Oocyte Maturation and Early Embryo Development     

RG Sturmey  A Reis  HJ Leese  TG McEvoy 《Reproduction in domestic animals》2009,44(S3):50-58

While much is known about the metabolism of exogenous nutrients such as glucose, lactate, pyruvate, amino acids by oocytes and pre-implantation mammalian embryos, the role of endogenous stores, particularly lipid, has been largely overlooked. The presence of lipid within oocytes and early embryos has been long known, and comparisons between species indicate that the amounts and types of lipid present vary considerably. Large amounts of intracellular lipid can compromise the success of cryopreservation and the removal of such lipid has been the subject of considerable effort. In this review, we present evidence that strongly suggests a metabolic role for lipid, specifically with regard to energy provision, in the late-stage oocyte and the pre-implantation embryo. We focus initially on oxygen consumption as a global indicator of metabolic activity, before reviewing different approaches that either have been designed to investigate directly, or have revealed indirectly the role of endogenous lipid in energy generation. These fall under five headings: (i) fatty acid oxidation; (ii) inhibition of triglyceride oxidation; (iii) culture in the absence of exogenous substrates; (iv) cytoplasmic organization; and (v) delipidation. On the basis of the data derived from these studies, we conclude that there is strong evidence for the utilization of endogenous lipid as an energy substrate by oocytes and early embryos.  相似文献