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371.
A. P. Kole Louis Hsu Wei Tchong 《European journal of plant pathology / European Foundation for Plant Pathology》1958,64(4):297-300
Samenvatting Droge en natte zaadontsmettingsmiddelen werden respectievelijk verstoven en verspoten op strookjes filtreerpapier. Voor het bepalen van de integrale werking werd ieder strookje rechtstreeks op een voedingsbodem met een toetsschimmel gelegd; bij het bepalen van de dampwerking werd direct contact tussen het filtreerpapier en de voedingsbodem vermeden door op de voedingsbodem eerst een reepje glas en daarop het strookje filtreerpapier te leggen.Summary Two factors are of importance for the laboratory evaluation of seed dressings: the integral action consisting of the sum of the direct action by diffusion and the vapour action, and the vapour action separately. In testing seed dressings for the integral action, the fungicide is applied to filter-paper strips which are placed on the surface of potato-dextrose agar mixed with a conidial suspension of the fungusGlomerella cingulata in Petri dishes. After incubation for three days at 23°C the width of the inhibition zone along the paper strips was taken as a measure for the fungicidal action. If seed dressings have to be tested for vapour action only, direct contact between the paper strips and the agar is avoided by putting a piece of glass (one half of a slide cut lengthwise) of the size of the paper strips between these and the agar. Dusts were applied to the paper strips with an apparatus according toLoosjes (1955) and steeps with a spraying apparatus according toten Houten & Kraak (1949). The method was applied to evaluate some commercial products. 相似文献
372.
373.
W H Hsu Z X Lu F B Hembrough 《Journal of the American Veterinary Medical Association》1985,186(2):153-156
The effects of xylazine on heart rate (HR) and mean arterial blood pressure (ABP) were studied in 5 conscious male dogs. An IV injection of xylazine (1 mg/kg) caused a decrease in HR, which was accompanied by sinus arrhythmia. Xylazine administration also caused an initial increase in ABP, which was followed by a decrease. Atropine sulfate (0.045 mg/kg, IM) increased both the ABP and HR, but prevented xylazine-induced bradycardia only in 3 of 5 dogs. The other 2 dogs had to be given a supplemental dose of atropine sulfate (0.01 mg/kg, IV) before xylazine-induced bradycardia was antagonized. In addition, atropine sulfate potentiated xylazine-induced hypertension for 60 minutes. Yohimbine, an alpha 2-adrenoreceptor blocking agent, given IV at a dosage of 0.1 mg/kg, antagonized hypertension, hypotension, and bradycardia induced by xylazine. In addition, doxapram HCl, given IV at a dosage of 5.5 mg/kg, antagonized bradycardia but potentiated xylazine-induced hypertension, and an IV injection of 4-aminopyridine at a dosage of 0.5 mg/kg did not affect the cardiovascular actions of xylazine. It was concluded that atropine sulfate at the IM dosage of 0.045 mg/kg may be insufficient to antagonize xylazine-induced bradycardia but may potentiate xylazine-induced hypertension, and yohimbine may be useful in antagonizing these untoward reactions associated with xylazine administration. Doxapram and 4-aminopyridine were not found to be beneficial. 相似文献
374.
C R Clarke C R Short R C Hsu J D Baggot 《American journal of veterinary research》1985,46(12):2461-2466
The purpose of this study was to determine the pharmacokinetic values for gentamicin in neonatal calves and to compare these values with those in adult cattle (cows). Gentamicin (4 mg/kg of body weight) was administered IV to 7 Holstein bull calves on days 1 (between 12 and 24 hours of age), 5, 10, and 15 after birth, and was administered once IV to 7 Holstein cows. Serum was collected from each animal before administration and at 22 different time intervals from 2 to 400 minutes after injection. Sera were analyzed for gentamicin concentrations. Decay of serum gentamicin concentrations was best described by a 2-compartment pharmacokinetic model. Elimination half-life (t1/2 (beta)) of gentamicin decreased from day 1 (149 minutes) to day 5 (119 minutes), but did not change between days 5 and 15 (111 minutes). Compared with the t1/2(beta) in 1- and 15-day-old calves, the t 1/2 (beta) in cows was shorter (76 minutes). In the calves, apparent volume of distribution (based on total area under the disposition curve) did not change between 1 (393 ml/kg) and 5 (413 ml/kg) days of age, decreased on day 10 (341 ml/kg) and cows day 15 (334 ml/kg), and was markedly smaller than that in cows (140 ml/kg). Total body clearance of gentamicin in cows (1.29 ml/min X kg) was lower than that seen in calves on day 1 (1.92 ml/min X kg) and on day 15 (2.10 ml/min X kg). The decrease in apparent volume of distribution of gentamicin was mirrored by a large decrease in the extracellular fluid volume, as measured by inulin space.(ABSTRACT TRUNCATED AT 250 WORDS) 相似文献
375.
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377.
Eddie Hang Chio En-Cheng Yang Hsiang-Ting Huang Err-Lieh Hsu Chi-Rong Chen Chin-Gi Huang Rong-Nan Huang 《Journal of pest science》2013,86(4):705-712
The biological activity of djulis (Chenopodium formosaneum) extracts was evaluated against mosquitoes and biting midges. Djulis extracts were relatively nontoxic to Aedes albopictus larvae. However, they showed interesting repellence against adult mosquitoes as estimated by the median effective dosages (ED50). ED50 values for djulis extracts against mosquito adults in descending order were: seed extracted with methanol (0.83 %), seed extracted with dichloromethane (0.66 %), leaf extracted with methanol (0.50 %), and leaf extracted with dichloromethane (0.40 %). Field tests also suggested that djulis methanol extracts were effective at about a 1 % level against biting midges (Forcipomyia taiwana). A total of 15 and 20 compounds accounting for 88.8 and 79.9 % in the seed and leaf extract, respectively were identified by gas chromatography coupled to mass spectrometry (GC–MS). Among these, 9, 12-octadecadienoyl chloride, (Z, Z) was found in both as well as being the major constituent in the leaf extract (35.7 %). Further studies on the repellent property of the extracts against mosquitoes and biting midges are warranted. 相似文献
378.
Chemical bioinduction of rubber in guayule plant 总被引:1,自引:0,他引:1
The treatment of young guayule plants with 2-(3,4-dichlorophenoxy)-triethylamine stimulated the accumulation of polyisoprenoid rubber in the stem and root tissues. This finding suggests that rubber productivity can be improved by the use of chemical agents on guayule and other rubber-forming plants. 相似文献
379.
Dinsmore AD Hsu MF Nikolaides MG Marquez M Bausch AR Weitz DA 《Science (New York, N.Y.)》2002,298(5595):1006-1009
We present an approach to fabricate solid capsules with precise control of size, permeability, mechanical strength, and compatibility. The capsules are fabricated by the self-assembly of colloidal particles onto the interface of emulsion droplets. After the particles are locked together to form elastic shells, the emulsion droplets are transferred to a fresh continuous-phase fluid that is the same as that inside the droplets. The resultant structures, which we call "colloidosomes," are hollow, elastic shells whose permeability and elasticity can be precisely controlled. The generality and robustness of these structures and their potential for cellular immunoisolation are demonstrated by the use of a variety of solvents, particles, and contents. 相似文献
380.
Eom CB Cava RJ Fleming RM Phillips JM Vandover RB Marshall JH Hsu JW Krajewski JJ Peck WF 《Science (New York, N.Y.)》1992,258(5089):1766-1769
Single-crystal epitaxial thin films of the isotropic metallic oxides Sr1-xCaxRuO(3) (0 = x = 1) were grown on miscut SrTiO(3)(100) substrates in situ by 90 degrees off-axis sputtering. These thin films exhibit low isotropic resistivities, excellent chemical and thermal stability, good surface smoothness, and high crystalline quality. Furthermore, the lattice parameters and magnetic properties can be varied by simply changing the strontium/calcium ratio. These epitaxial thin films, and their multilayer structures with other oxide materials, can be used for the fabrication of superconducting, ferroelectric, magneto-optic, and electro-optic devices. 相似文献