Showing papers in "Transactions of the American Microscopical Society in 1978"
856 citations
TL;DR: Throughout the bookributors point out new approaches to the study of these organisms, e.g., in their morphology and physiology and in the complexities of the hosts' responses to invasion.
473 citations
TL;DR: Taranachak et al. as discussed by the authors described the Diatomaceae of Lake Michigan as collected during the last 16 years from the water supply of the city of Chicago, USA.
Abstract: 1969. Plankton Diatom Assemblages in Lake Michigan. Univ. Michigan, Great Lakes Res. Div., Spec. Rep. No. 47. 268 pp. TARAPCHAK, S. J. & STOERMER, E. F. 1976. Environmental Status of the Lake Michigan Region. Vol. 4. Phytoplankton of Lake Michigan. ANL/ES-40 Vol. 4. Argonne National Laboratory, Argonne, Illinois. 204 pp. THOMAS, B. W. & CHASE, H. H. 1887. The Diatomaceae of Lake Michigan as collected during the last 16 years from the water supply of the city of Chicago. Notarisia, 2: 328-330.
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434 citations
TL;DR: The Foundations of parasitology as mentioned in this paper, a.k.a., the foundation of parasitism, is a well-known work in parasitological research and research.
Abstract: Foundations of parasitology , Foundations of parasitology , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی
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TL;DR: Thirdand fourth-stage larvae from molluscs are described and compared with fourth-Stage larvae and adults from marine turtles and Comparative data for fourth- stage Sulcascaris from Australian turtles and a scallop are also presented.
Abstract: LICHTENFELS, J. R., BIER, J. W. & MADDEN, P. A. 1978. Larval anisakid (Sulcascaris) nematodes from Atlantic molluscs with marine turtles as definitive hosts. Trans. Amer. Micros. Soc., 97: 199-207. Anisakid nematode larvae identified to the genus Sulcascaris Hartwich, 1957 have been collected from several marine molluscs: surf clam Spisula solidissima, calico scallop Argopecten gibbus, Atlantic bay scallop Argopecten irradians, moon sail Lunatia heros, and whelk Busycon canaliculata. As an adult, the only known species of this nematode genus (Sulcascaris sulcata) parasitizes the stomach and intestine of the green (Chelonia mydas) and loggerhead (Caretta caretta) turtle. Parasitized turtles occur in the areas where the larvae parasitize the molluscs. The excretory system of S. sulcata includes an excretory pore at the base of the ventral interlabium, a large ventral ribbon-like gland cell with a nucleus posterior to the level of the ventriculus, and an excretory canal in the right lateral chord that extends posteriorly about half the length of the body. Thirdand fourth-stage larvae from molluscs are described and compared with fourth-stage larvae and adults from marine turtles. Comparative data for fourth-stage Sulcascaris from Australian turtles and a scallop are also presented.
TL;DR: Scanning electron microscopy shows marked homologies between the oral and flagellar pocket regions of Procryptobia, Dimastigella, and Cryptobia; but in the phagotrophic genera the rostrum and cytostomal lip are developed for seizing prey.
Abstract: VICKERMAN, K. 1978. The free-living trypanoplasms: descriptions of three species of the genus Procryptobia n. g. and redescription of Dimastigella trypaniformis Sandon, with notes on their relevance to the microscopical diagnosis of disease in man and animals. Trans. Amer. Micros. Soc., 97: 485-502. Detailed light microscopical descriptions of four free-living trypanoplasm-like flagellates are given and their position in the order Kinetoplastida Honigberg, 1963 ascertained. In gross morphology, members of the new genus Procryptobia resemble members of the genus Cryptobia Leidy, 1846 but differ in being phagotrophic and in lacking cortical contractility. The trypanocide 4'.6-diamidino-2-phenylindole (DAPI) used as a DNA-specific vital stain in conjunction with fluorescence microscopy demonstrates the presence of a single prominent kinetoplast in the trophic phase of Procryptobia spp; the three species described here-P. vorax n. sp., P. tremulans n. sp., and P. glutinosa n. sp. -differ in the shape of this structure. All form mononucleate thin walled cysts; in P. glutinosa, however, several kinetoplast nucleoids are present in the mature cyst and in the metacystic flagellate. The genus Dimastigella Sandon, originally described as an akinetoplastic trypanoplasm, is shown here to differ from Cryptobia and Procryptobia in the arrangement of the basal bodies of its flagella, and from Cryptobia in being phagotrophic. DAPI-staining, moreover, reveals that D. trypaniformis has multiple minute kinetoplast nucleoids present throughout the mitochondrion in the trophic flagellate; this polykinetoplastic condition is maintained in the thick walled cyst. Scanning electron microscopy shows marked homologies between the oral and flagellar pocket regions of Procryptobia, Dimastigella, and Cryptobia; but in the phagotrophic genera the rostrum and cytostomal lip are developed for seizing prey. Procryptobia tremulans was isolated from a contaminated human urine sample, where
TL;DR: SPOON as mentioned in this paper is a rotary microcompressor that allows delicately controlled compression of microorganisms between a standard coverslip and slide with negligible shear forces, which is used to slow and stop swimming organisms.
Abstract: SPOON, D. M. 1978. A new rotary microcompressor. Trans. Amer. Micros. Soc., 97: 412-416. A new rotary microcompressor is described and compared with the rotocompressor invented by A. A. Schaeffer. The present instrument allows delicately controlled compression of microorganisms between a standard coverslip and slide with negligible shear forces. The low profile design permits turreting to higher power objective lenses without refocusing. The compression plate with affixed coverslip is prevented from rotating by two precisely positioned rods in the baseplate that holds the glass slide. A reduction gear with graduated scale is turned by thumb wheel to raise and lower the coverslip relative to the glass slide. Slide preparations can be changed rapidly by releasing the four tight-fitting retaining clips holding the compression plate and reduction gear to the baseplate. The Spoon Microcompressor is designed to gently slow and stop swimming organisms, compress organisms to a set thickness and thus determine biomass, and compress soft-bodied organisms so that their internal structures, including ingested food, can be better seen. The rotocompressor was invented over 40 years ago by A. A. Schaeffer, who never patented his invention but marketed many through the Biological Institute of Philadelphia. His precision instrument2 has been considered by numerous protozoologists as an indispensable tool for slowing and compressing microorganisms, including especially the ciliates. Fenchel (1967, 1968) determined ciliate biomass and food vacuole contents by use of it. Wichterman (1953) used a modified rotocompressor (an added circular 100-unit scale, with each unit representing a compression of 5 gum) in observing nuclear events in compressed paramecia. Uhlig (1972) included mention of the Schaeffer instrument in his review of methods of collecting and studying marine ciliates. DESCRIPTION OF ROTOCOMPRESSOR
TL;DR: In this article, the authors propose that having more aspects to know and understand will lead to becoming a more precious person, and becoming more precious can be situated with the presentation of how your knowledge much.
Abstract: Of course, from childhood to forever, we are always thought to love reading. It is not only reading the lesson book but also reading everything good is the choice of getting new inspirations. Religion, sciences, politics, social, literature, and fictions will enrich you for not only one aspect. Having more aspects to know and understand will lead you become someone more precious. Yea, becoming precious can be situated with the presentation of how your knowledge much.
TL;DR: It is concluded that fission fragments develop new heads through a remodeling process which differs from regeneration involving blastema formation which occurs after decapitation.
Abstract: NENTWIG, M. R. 1978. Comparative morphological studies of head development after decapitation and after fission in the planarian Dugesia dorotocephala. Trans. Amer. Micros. Soc., 97: 297-310. Head regeneration after decapitation and head formation after fission in Dugesia dorotocephala (Woodworth) were compared to determine if the processes giving rise to new heads were identical. Decapitated animals exhibited a slight increase in length but no decrease in width during the regenerative period. Fission fragments did not increase in length, but decreased significantly in width. The presence of large numbers of formative cells in a well-defined blastema was observed in decapitated animals. Fission fragments showed no blastema formation, and the number of formative cells was lower as compared to decapitated animals. It is concluded that fission fragments develop new heads through a remodeling process which differs from regeneration involving blastema formation which occurs after decapitation. Due to the absence of a blastema and fewer numbers of formative cells in fission fragments, it was possible to study the role of the ventral nerve cords in the formation of cephalic ganglia. New ganglia appear to be direct outgrowths of the old ventral nerve cords. Changes in the neurosecretory cell population support the view that neurosecretory cells play a role in the formation of cephalic ganglia.