108,047 Result(s)

Article

A Thermolabile Accessory Growth-factor to Rhizobium

IN addition to the thermostable accessory growth-factor (Allison and Hoover's coenzyme R), we have found a thermolabile accessory growth-factor to the root-nodule bacteria.

H. K. CHEN, M. K. HSÜ in Nature (1944)

Article

An Antibiotic Substance in the Chinese Water-chestnut, Eleocharis tuberosa

IN our search for the presence of antibiotic substances in the higher plants used in China for food or for drugs, we have examined the tubers of the waterchestnut, Eleocharis tuberosa.

S. L. CHEN, B. L. CHENG, W. K. CHENG, P. S. TANG in Nature (1945)

Article

Induced Polycythæmia by l-Ascorbic Acid in Albino Mice

The effect of l-ascorbic acid in increasing the number of red blood corpuscles has been studied in various laboratory animals¹ but hitherto not in mice. The present investigation was made to ascertain the action ...

JUI-MING CHEN in Nature (1947)

Article

Nature genetique des mutants a deficience respiratoire de la souche B-II de la levure de boulangerie

Shih-Yi Chen, Boris Ephrussi, Helene Hottinguer in Heredity (1950)

Article

Synthesis of Naphthotocopherol

THE method of Tishler et al.¹ for the synthesis of naphthotocopherol consistently yielded a product contaminated with as much as 5 per cent of naphthotoco-pheryl acetate. The contaminant was detected by infrared ...

LINDA H. CHEN, R. DUNCAN DALLAM in Nature (1963)

Article

Elevation by Propynylamines of Rat Tissue Norepinephrine-levels and Reserpine Antagonism in Mice

THE hydrochlorides of 2-propynylanune, di-2-propynylamine, and tri-2-propynylamine were tested in several systems for monoamine-oxidase inhibition. The 2-propynylamines were supplied through the courtesy of Dr...

J. R. McLEAN, G. CHEN in Nature (1963)

Article

Fluorescence Quantum Yield of I-Dimethyl-aminonaphthalene-5-sulphonate

FLUORESCENCE quantum yields may be determined with spectrofluorometers simply by comparing the corrected emission spectrum of an unknown substance with that of a compound of known fluorescence yield¹, provided th...

RAYMOND F. CHEN in Nature (1966)

Article

Training schedule in a two-turn task in a temporal circular maze

Effectiveness of three training schedules on learning of a two-turn task in a temporal circular maze was studied with white rats. The results were viewed as giving support to a working hypothesis that the degr...

Chia-Shong Chen in Psychonomic Science (1967)

Article

Studies in Acute Iron Poisoning III. The Hemodynamic Alterations in Acute Experimental Iron Poisoning

Extract: One hour after administration of a lethal dose of ferrous sulfate into the intestine, 10 dogs sustained a sharp decline in cardiac output (mean 57%), a lesser reduction of arterial blood pressure (mea...

C F Whitten, Y C Chen, G W Gibson in Pediatric Research (1968)

Article

Corrigendum

Peter J. Chen in Archive for Rational Mechanics and Analysis (1969)

Article

Aldolase C in Brain Tumour

THREE molecular species of aldolase have been observed in mammalian tissues: aldolase A in muscle, aldolase B in liver and aldolase C in brain^1–3. We have already reported that the aldolase B found in the normal ...

TAKASHI SUGIMURA, SHIGEAKI SATO, SUMIE KAWABE, NORIO SUZUKI, TE CHEN CHIEN… in Nature (1969)

Article

Distribution of ³H-acetyl Growth Hormone (³H-HGH) in the Subcellular Fractions of Rat Liver

To understand the early molecular events that lead to some of the effets of growth hormone on liver, a dose of ³H-HGH (18 × 10⁶ cpm, 60 μg) was give i.v. to hypophysectomized rats. After the injection, livers wer...

Vaddanahally T Maddaiah, Iraj Rezvani, Shang Y Chen, Platon J Collipp in Pediatric Research (1970)

Article

Training schedules and the E-effect on the acquisition of a two-turn task in a temporal circular maze

Eighteen male and 18 female hooded rats were trained to perform a two-turn task in a temporal circular maze to evaluate the effects of different training schedules on acquisition rate. Ss were randomly allocat...

Heather Mohay, Chia-Shong Chen in Psychonomic Science (1970)

Article

Runway performance and reward magnitude

The training, extinction, and retraining performance of three groups of rats with large rewards (11 45-mg), small (45-mg) rewards, and small (45-mg) rewards with intertrial feedings (10 45-mg) was investigated...

Edward L. Wike, Jaw-Sy Chen in Psychonomic Science (1970)

Article

Anaesthetic dosage for epidural sympathetic blockade

The anaesthetic dose for epidural sympathetic block was determined by the objective method of the PGR in a group of surgical patients. It was found that 10 ml of 0.375 per cent lidocaine with epinephrine (1:20...

P. Y. Chen, Cloid D. Green in Canadian Anaesthetists’ Society Journal (1970)

Article

The facilitating effects of mental rehearsal in the acquisition of rotary pursuit tracking

Two experiments were performed to test the hypothesis that mental rehearsal facilitates learning of rotary pursuit tracking. In Experiment 1, improvement in rotary pursuit tracking was compared for a physical ...

Edna I. Rawlings, Irving L. Rawlings, Stuart S. Chen… in Psychonomic Science (1972)

Article

Functional development of the altitude convulsion mechanism in mice and rabbits

Fifty one young mice from 6 litters and 17 young rabbits from 3 litters at different ages were used for determining their functional maturation of the altitude convulsion mechanism. It was found that none of t...

C. F. Chen, H. S. Fang in Space life sciences (1972)

Article

Inhibition of the CO₂-sensitive Na efflux in barnacle muscle fibers by micro-injection of ethacrynic acid

Es wird gezeigt, dass die Mikroinjektion von Äthacrynsäure [2,3-Dichloro-4(2-methylenbatyryl)-phenoxyacetsäure] in die isolierte Muskelfaser der Entenmuschel nur dann den Natriumausstrom herabsetzt, wenn die B...

B. G. Danielson, E. E. Bittar, S. S. Chen, E. Y. Tong in Experientia (1972)

Article

Sympathomimetic anesthetics

The characteristic anaesthetic and other pharmacological properties of phencyclidine, ketamine, dexoxadrol and etoxadrol and the structure-activity relationship of these compounds have been described. Their po...

Graham Chen in Canadian Anaesthetists’ Society Journal (1973)

Article

Immunoferritin studies of Marek's disease virus directed intracellular and membrane antigens

Intracellular and membrane antigens of Marek's disease virus (MDV) were studied by immunofluorescence and immunoferritin techniques. Sera from chickens surviving the disease and rabbits hyperimmunized with pur...

Dr. K. Nazerian, J. H. Chen in Archiv für die gesamte Virusforschung (1973)