Dorsal Approach to the Caudal Pelvic Canal and Rectum Effect on Normal Dogs

A dorsal surgical approach to the perineal area and rectum was made on 10 healthy, adult dogs. The rectococcygeal muscle was incised and the levator ani and external sphincter muscles were separated to the level of the caudal rectal nerve. All dogs were clinically normal throughout a 3 week postoperative observation period.     

CHEMICAL WEED CONTROL IN BROADCAST-SEEDED FLOODED TROPICAL RICE

Summary. Several new herbicides were tested for control of weeds in broadcast-seeded flooded tropical rice. Among the new herbicides, S-(2-methyl-l-piperidylcarbonyl-methyl)- O,O -di- n -propyl dithiophosphate (C-19490), S-(2-methyl-l-piperidylcarbonyl-methyl)- O,O -di- n -propyl dithiophosphate combined with 2-(1',2'-dimethylpropylamino)-4-ethylamino-6-methylmercapto- s -triazine [C-19490/C-18898 (C-288)], and N -secondary-butyl-4-tertiary-butyl-2,6-dinitroaniline (A-820) were highly selective in controlling Echinochloa crus-galli (barnyard grass) and other annual weeds under tropical conditions. S-(4-chlorobenzyl)- N,N -diethylthiol carbamate (benthiocarb) and N -(butoxymethyl)-2-chloro-2',6'-diethylacetanilide (butachlor) continued to look promising in our experiments. Only butachlor is widely used in Asia.
Désherbage chimique des cultures tropicales de riz inorndé, seméà la volée     

Some techniques used in clinical investigation of cardiovascular function in the dog

Five methods are described, which have proved to be useful in closed chest experimental and clinical cardiovascular research in small animals.     

Screening of 170 Peruvian plant species for allelopathic activity by using the Sandwich Method

Peru is one of the 20 botanically extremely diverse countries in the world, with >17 000 flowering plants, of which 30% are endemic. So far, no systematic research has been conducted on the screening of the allelopathic plants. In this study, the allelopathic activity of 170 species from 61 families of Peruvian plants that were collected from the three main regions of Peru – the Costa (Pacific coastline), the Sierra (Andean mountains), and the Selva (Amazonian rainforest) – was evaluated. The allelopathic activity was determined by the Sandwich Method, which can evaluate the activity of leaf leachates. The species that were found to be highly inhibitory in this screening, under the criterion of >90% inhibition of the radicle of lettuce (Lactuca sativa) seedlings, were Aristeguietia ballii and Diplostephium foliosissimum (Asteraceae) and Spondias mombin (Anacardiaceae). All of these species are native plants from Peru. This study gives a strong clue regarding the potential of isolating potent allelochemicals from these plants in the future.