In contrast to climacteric fruits, where ethylene is known to be pivotal, the regulation of ripening in non-climacteric fruits is not well understood. In the non-climacteric strawberry (Fragaria anannassa), auxin and abscisic acid (ABA) are thought to be important, but the roles of other hormones suggested to be involved in fruit development and ripening are not clear. Here changes in the level...

This paper describes an evaluation of the effects of three practical display design variables on air refueling boom operator estimates of distance, ratings of image stability and ratings of visual comfort. Eight combinations of three design variables were tested. Two separate display systems, one collimated and the other direct view, were set up such that stereopsis and head tracking could be t...

KOZEK, W. J. 1975. Trichinella spiralis: Morphological characteristics of male and female intestine-infecting larvae. Experimental Parasitology 37, 380-387. The sex of encysted and excysted intestine-infecting T. spiralis larvae can be distinguished by the following morphological characteristics: the male larva has a long (approx 50 pm) rectum, and the anterior part of the testis is curved post...

The sperm of the gastropod Strombus luhuanus show dimorphism. The eusperm have a nucleus and fertilize the egg, whereas the other type of sperm, parasperm, are anucleate and are thought to assist fertilization. Here we report the autonomous changes in the swimming pattern of S. luhuanus eusperm. In artificial seawater, the eusperm collected from S. luhuanus sperm ducts formed sperm bundles and ...

and twenty-eight and four-sixteenths inches long, the excreta dropping through this opening?when the flap-plates of the shutters are down?into the filth-receptacle below. The upper surface of the top panels (right and left) has lugs in front with holes for carrying the front pins of the foot-rests, and lugs behind with L-shaped slots to admit the back pins of the foot-rests. The upper surface o...

Pritchardia boliviensis n. gen. n. sp. (Anoplocephalidae: Linstowiinae) is described from marsupials (Marmosops noctivagus, Metachirus nudicaudatus, Gracilinanus sp.) collected in Bolivia and Paraguay. These cestodes have a very small strobila with only three segments, regularly alternating genital pores, genital ducts crossing excretory canals ventrally, ovoid to pyriform cirrus sac, three to ...

Isocarpha comprises five species ranging from southern Texas and the Bahamas to northern Peru and northeastern Brazil. The genus belongs in Eupatorieae rather than Heliantheae, but structure of the head of Isocarpha with its elongate, chaffy receptacle is anomalous within Eupatorieae. An hypothesis is presented suggesting the evolutionary derivation of this type of head through formation of flo...

Abstract. The archaeological site of Tiwanaku is among the most important examples Bolivian archaeology and UNESCO World Heritage Site since 2000. This works reports a geomatic-based surveying modelling methodology applied to ritual receptacle excavated from semi-subterranean temple in complex. A high-resolution 3D survey was conducted through structured-light projection scanning post-processin...

Although sperm are typically thought to be small, tadpole-like cells produced in vast quantities, sperm size, form and number all vary tremendously across species. Sperm form ranges from amoeboid or discoid to multiflagellate elongated structures [1]. Even within the more familiar uniflagellate spermatozoa, length varies by several orders of magnitude, from the tiny 28μm long porcupine sperm to...