Ophthalmic findings in 10 captive,anesthetized chimpanzees (Pan troglodytes)     

Alex B. Sigmund  Andrew C. Cushing  Diane V. H. Hendrix 《Veterinary ophthalmology》2020,23(4):760-763

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Topologically linked protein rings in the bacteriophage HK97 capsid     

Wikoff WR  Liljas L  Duda RL  Tsuruta H  Hendrix RW  Johnson JE 《Science (New York, N.Y.)》2000,289(5487):2129-2133

The crystal structure of the double-stranded DNA bacteriophage HK97 mature empty capsid was determined at 3.6 angstrom resolution. The 660 angstrom diameter icosahedral particle contains 420 subunits with a new fold. The final capsid maturation step is an autocatalytic reaction that creates 420 isopeptide bonds between proteins. Each subunit is joined to two of its neighbors by ligation of the side-chain lysine 169 to asparagine 356. This generates 12 pentameric and 60 hexameric rings of covalently joined subunits that loop through each other, creating protein chainmail: topologically linked protein catenanes arranged with icosahedral symmetry. Catenanes have not been previously observed in proteins and provide a stabilization mechanism for the very thin HK97 capsid.  相似文献   

Long-term evaluation of the use of Ahmed gonioimplants in dogs with primary glaucoma: nine cases (2000-2008)     

Westermeyer HD  Hendrix DV  Ward DA 《Journal of the American Veterinary Medical Association》2011,238(5):610-617

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Efficacy of non-toxic surfaces to reduce bioadhesion in terrestrial gastropods     

Kennedy AJ  Vasudevan R  Pappas DD  Weiss CA  Hendrix SH  Baney RH 《Pest management science》2011,67(3):318-327

BACKGROUND: Invasive species are described as the greatest threat to biodiversity, after habitat destruction and climate change, potentially imposing economic impacts and indigenous species impairment. Commonly applied chemical controls present the potential for legacy contamination and non‐target organism injury. This study investigated the effects of different substrates and novel topographical surfaces on the behavioral and mechanical associations of the terrestrial gastropod Otala lactea. RESULTS: The gastropod preferentially aestivated on rough glass (61% increase, P < 0.01) relative to smooth glass but avoided a cross‐patterned surface tessellation on silicone (82% reduction, P < 0.01) relative to smooth silicone. Significant deviations in turning behavior were found on the cross‐patterned topographical surface and hydrophobic Teflon surfaces. The strongest correlation with gastropod adhesion strength to surfaces was found for surface elastic modulus (R = 0.88, P = 0.03), followed by hydrophobicity (R = ? 0.71, P = 0.14), but no relationship with roughness (P = 0.36). CONCLUSION: Preliminary data suggest surface roughness controlled aestivation behavior while elastic modulus (surface flexibility) controlled adhesion strength. In spite of greater adhesion to high‐modulus materials, surface modulus was not a statistically significant controlling factor on gastropod aestivation preference. Understanding and exploiting the behavioral and mechanistic cues that organisms use while attaching to surfaces may lead to more environmentally benign control approaches. Published 2010 by John Wiley & Chemical Industry  相似文献   

Large-Scale Synthesis of Aligned Carbon Nanotubes     

WZ Li  SS Xie  LX Qian  BH Chang  BS Zou  WY Zhou  RA Zhao  G Wang 《Science (New York, N.Y.)》1996,274(5293):1701-1703

Large-scale synthesis of aligned carbon nanotubes was achieved by using a method based on chemical vapor deposition catalyzed by iron nanoparticles embedded in mesoporous silica. Scanning electron microscope images show that the nanotubes are approximately perpendicular to the surface of the silica and form an aligned array of isolated tubes with spacings between the tubes of about 100 nanometers. The tubes are up to about 50 micrometers long and well graphitized. The growth direction of the nanotubes may be controlled by the pores from which the nanotubes grow.  相似文献   

Expression and Localization of Vascular Endothelial Growth Factor and its Receptors in the Corpus Luteum During Oestrous Cycle in Water Buffaloes (Bubalus bubalis)     

VS Chouhan  RP Panda  VP Yadav  V Babitha  FA Khan  GK Das  M Gupta  SS Dangi  G Singh  S Bag  GT Sharma  B Berisha  D Schams  M Sarkar 《Reproduction in domestic animals》2013,48(5):810-818

The aim of this study was to document the expression and localization of VEGF system comprising of VEGF isoforms (VEGF 120, VEGF 164 and VEGF 188) and their receptors (VEGFR1 and VEGFR2) in buffalo corpus luteum (CL) obtained from different stages of the oestrous cycle. Real‐time RT‐PCR (qPCR), Western blot and immunohistochemistry were applied to investigate mRNA expression, protein expression and localization of examined factors. In general, all the components of VEGF system (the VEGF isoforms and their receptors) were found in the water buffalo CL during the oestrous cycle. The mRNA as well as protein expression of VEGF system was highest during the early and mid‐luteal phase, which later steadily decreased (p < 0.05) after day 10 to reach the lowest level in regressed CL. As demonstrated by immunohistochemistry, VEGF protein was localized predominantly in luteal cells; however, VEGFR1 and VEGFR2 were localized in luteal cells as well as in endothelial cells. In conclusion, the dynamics of expression and localization of VEGF system in buffalo corpora lutea during the luteal phase were demonstrated in this study, indicating the possible role of VEGF system in the regulation of luteal angiogenesis and proliferation of luteal as well as endothelial cells through their non‐angiogenic function.  相似文献   

Cerebral cuterebrosis in a dog   总被引：1，自引：0，他引：1  

E A Sartin  C M Hendrix  D L Dillehay  B Nicholls 《Journal of the American Veterinary Medical Association》1986,189(10):1338-1339

A second instar Cuterebra larva was found in the thickened meninges of a 6-week-old female Doberman Pinscher at necropsy. The dog appeared blind and had chewing fits before death. Cerebral cuterebrosis in the dog is uncommon. This report briefly discusses the pathogenesis of the condition.  相似文献   

Effects of propofol-induced sedation on intradermal test reactions in dogs with atopic dermatitis     

Graham LF  Torres SM  Jessen CR  Horne KL  Hendrix PK 《Veterinary dermatology》2003,14(3):167-176

We compared the effect of propofol and saline control on intradermal test reactions in dogs with atopic dermatitis undergoing outpatient intradermal testing (IDT). Nineteen dogs were used in this clinical study. Patients were randomly allocated to receive either intravenous (IV) propofol or IV 0.9% saline, and IDT was performed on the right or left (randomized) lateral thorax. One investigator, unaware of the treatments, interpreted all IDT results. Injection sites were analysed using a subjective and objective method. A value of P or= 1+ on all dogs, significantly more positive sites were apparent during propofol sedation than during saline administration. In addition, the greater number of individual dogs experiencing more positive reactions >or= 1+ during propofol sedation was significant. When subjectively analysing reactions >or= 2+, the greater number of positive reactions and the greater number of dogs with more positive reactions observed during propofol treatment was not significantly different from the saline control. When analysed objectively, the greater number of positive reactions observed during propofol sedation was not significant. A greater number of dogs had higher subjective scores and larger objective measurements during propofol sedation compared with saline administration. In summary, propofol sedation was associated with an overall greater number of positive IDT reactions compared with the saline control. Although not always significant, this difference should be considered when choosing propofol for skin testing dogs with atopic dermatitis.  相似文献   

Effects of topical application of a 2% solution of dorzolamide on intraocular pressure and aqueous humor flow rate in clinically normal dogs     

Cawrse MA  Ward DA  Hendrix DV 《American journal of veterinary research》2001,62(6):859-863

OBJECTIVE: To evaluate effects of topical application of a 2% solution of dorzolamide on intraocular pressure (IOP) and aqueous humor flow rate in clinically normal dogs. ANIMALS: 15 Beagles. PROCEDURE: The IOP was measured in both eyes of all dogs for 3 days to determine baseline values. In a single-dose study, 50 microl of dorzolamide or control solution was applied in both eyes at 7:00 AM, and IOP was measured 7 times/d. In a multiple-dose study, dorzolamide or control solution was applied to both eyes 3 times/d for 6 days, and IOP was measured 4 times/d during treatment and for 5 days after cessation of treatment. Aqueous humor flow rate was measured for all dogs fluorophotometrically prior to treatment and during the multiple-dose study. RESULTS: In the single-dose study, dorzolamide significantly decreased IOP from 30 minutes to 6 hours after treatment. Mean decrease in IOP during this time span was 3.1 mm Hg (18.2%). Maximal decrease was detected 6 hours after treatment (3.8 mm Hg, 22.5%). In the multiple-dose study, dorzolamide decreased IOP at all time points, and maximal decrease was detected 3 hours after treatment (4.1 mm Hg, 24.3%). Mean aqueous humor flow rate decreased from 5.9 to 3.4 microl/min (43%) after treatment in the dorzolamide group. CONCLUSIONS AND CLINICAL RELEVANCE: Topical application of a 2% solution of dorzolamide significantly decreases IOP and aqueous humor flow rate in clinically normal dogs. Therefore, topical administration of dorzolamide should be considered for the medical management of dogs with glaucoma.  相似文献   

Macracanthorhynchus ingens infection in a dog     

Pearce JR  Hendrix CM  Allison N  Butler JM 《Journal of the American Veterinary Medical Association》2001,219(2):194-196

A 4-month-old sexually intact female Siberian Husky was examined because of diarrhea and 4 flesh-colored annulated helminths that were recovered from the dog's feces. Infection with Macracanthorhynchus ingens was diagnosed on the basis of morphologic features of the adult parasites and ova. Spindle-shaped eggs (mean length, 91 microm; mean width; 54 microm) were obtained from the body cavity of a gravid female specimen. The dog was treated empirically with epsiprantel (5.5 mg/kg [2.5 mg/lb] of body weight) and ivermectin (250 to 500 microg/kg [114 to 227 microg/lb]), and the diarrhea resolved. Infection with this parasite has been reported in raccoons from the same geographic area. Macracanthorhynchus ingens is typically a parasite of raccoons, wolves, badgers, foxes, skunks, mink, and moles; transmission from wildlife to dogs may occur via ingestion of infected intermediate hosts (millipedes).  相似文献