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  • Artikel: DFG Deutsche Nationallizenzen  (18)
  • deer  (5)
  • Adirondacks  (4)
  • General Chemistry  (3)
  • Immunocytoma  (3)
  • phenolic compounds  (3)
Datenquelle
  • Artikel: DFG Deutsche Nationallizenzen  (18)
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Erscheinungszeitraum
Schlagwörter
  • 1
    ISSN: 1573-1561
    Schlagwort(e): Acer rubrum ; Adirondacks ; aspen ; beaver ; Castor canadensis ; feeding inhibition ; Populus tremuloides ; red maple
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie
    Notizen: Abstract At many beaver (Castor canadensis) sites at Allegany State Park in New York State, red maple (Acer rubrum) is the only or one of the few tree species left standing at the ponds' edges. The relative palatability of red maple (RM) was studied in three ways. (1) At seven beaver sites, the available and utilized trees were recorded and an electivity index (E) computed. Of 15 tree species, RM ranked second or fourth lowest. (2) In experiment I, RM, sugar maple (A. saccharum, SM), and quaking aspen (Populus tremuloides) logs were presented cafeteria style at 10 colonies. RM was the least preferred. (3) Bark of RM was extracted with solvents. Aspen logs were painted (experiment II) or soaked (experiment III) with this RM extract and presented to beaver cafeteria-style, along with aspen and RM controls. This treatment rendered aspen logs less palatable, indicating that a chemical factor had been transferred.
    Materialart: Digitale Medien
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  • 2
    Digitale Medien
    Digitale Medien
    Springer
    Journal of chemical ecology 1 (1975), S. 125-131 
    ISSN: 1573-1561
    Schlagwort(e): deer ; mammals ; odor preference ; odor specificity ; olfactory discrimination ; pheromone ; sexual isolation ; social odor ; tarsal scent
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie
    Notizen: Abstract Two subspecies of deer, black-tailed deer (Odocoileus hemionus columbianus) and Rocky Mountain mule deer (O. h. hemionus) were exposed to the tarsal scents of both subspecies in a social setting. The scent was sprayed on one individual in a group. The responses, consisting of sniffing, licking, and following, were stronger to each subspecies' own tarsal scent. This discrimination may be important for sexual isolation in areas where the ranges of the two species overlap.
    Materialart: Digitale Medien
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  • 3
    Digitale Medien
    Digitale Medien
    Springer
    Virchows Archiv 373 (1977), S. 303-309 
    ISSN: 1432-2307
    Schlagwort(e): Immunocytoma ; Malignant lymphoma, lymphoplasmacytoid ; Chronic lymphocytic leukemia ; Tissue mast cell count and distribution ; Differential diagnostic parameters in lymph node biopsies
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary The amount and distribution of tissue mast cells in the three subtypes of immunocytoma (IC) were studied in lymph nodes of 58 cases and compared with the findings on 34 cases of chronic lymphocytic leukemia (CLL). There were significantly more mast cells in the lymphoplasmacytic and lymphoplasmacytoid subtypes of IC than in CLL. The median mast cell count for the polymorphic subtype of IC was also greater than that for CLL; however, this difference was not statistically significant. Tissue mast cells were diffusely distributed in the lymph nodes in IC, whereas they were chiefly located in the sinus in CLL. Moreover, the cells themselves and their granules were generally larger in IC. Increase in the number and altered distribution of the tissue mast cells in histological sections are therefore diagnostic aids for distinguishing IC from CLL.
    Materialart: Digitale Medien
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  • 4
    ISSN: 1432-0584
    Schlagwort(e): Non-Hodgkin lymphoma ; Chronic lymphocytic leukaemia ; Immunocytoma
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Clinical data of 116 patients with chronic lymphocytic leukaemia (CLL) and of 114 patients with lymphoplasmacytic/lymphoplasmacytoid lymphoma (synonym: LP immunocytoma, IC) as diagnosed according to the Kiel classification were compared. This interim evaluation of a prospective multicenter study of the Kiel Lymphoma Study Group characterizes IC the less favorable lymphoma entity as evidenced by a more rapid lymph node enlargement, by a higher incidence of constitutional symptoms and of marked anaemia, and by a higher percentage of patients requiring early treatment. In addition, in IC autoimmune haemolytic anaemia was detected in 11.2% of investigated patients as compared to none of the patients with CLL, and monoclonal gammopathy was disclosed in 34.2% of investigated patients as compared to only three patients with CLL who could be, however, unrecognized cases of IC. Actuarial survival data after a follow-up period of 40 months are in favor of an overall better prognosis of patients with CLL than of patients with IC.
    Materialart: Digitale Medien
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  • 5
    Digitale Medien
    Digitale Medien
    Springer
    Journal of chemical ecology 10 (1984), S. 1707-1729 
    ISSN: 1573-1561
    Schlagwort(e): Alert odor ; bioassay ; black-tailed deer ; Cervidae ; deer ; Odocoileus hemionus columbianus
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie
    Notizen: Abstract Black-tailed deer (Odocoileus hemionus columbianus) discharge an odor from the metatarsal (MT) gland, located on the hindleg, when disturbed or alarmed. Freely moving, captive deer were exposed to the MT odor by means of a remote-release apparatus. Responses by males and females to MT odor from both sexes were recorded with a coding system and a video camera. When the odor was present, females became more alert and left the site more often than in the presence of control odors, odorless air, or deer urine. It is concluded that the MT secretion provides an alert signal, placing the odor into the class of alarm pheromones. There is no evidence that the closely related white-tailed deer,O. virginianus, possesses this alert (or alarm) odor system to the same degree.
    Materialart: Digitale Medien
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  • 6
    Digitale Medien
    Digitale Medien
    Springer
    Journal of chemical ecology 21 (1995), S. 941-957 
    ISSN: 1573-1561
    Schlagwort(e): Beaver ; Castor canadensis ; castoreum ; communication ; neutral compounds ; phenolic compounds ; principal components ; social odors ; territory
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie
    Notizen: Abstract North American beaver (Castor canadensis) were observed to sniff from the water and make land visits to some synthetic chemical components of castoreum placed on experimental scent mounds (ESM). In previous analysis, the elicitation (presence/absence), completeness, and/or strength (number, duration) of these key responses served as separate measures of biological activity. In this paper, we used principal components analysis (PCA) to combine linearly six related measures of observed response and one index of overnight visitation calculated over all trials. The first principal component accounted for a majority of the variation and allowed ranking of the samples based on their composite bioactivity. A second PCA, based only on response trials (excluding trials with no responses), showed that responses to the synthetic samples, once elicited, did not vary greatly in completeness or strength. None of the samples evoked responses as complete or strong as the castoreum control. Castoreum also elicited more multiple land visits (repeated visits to the ESM by the same individual or by more than one family member) than the synthetic samples, indicating that an understanding of the castoreum chemosignal requires consideration of responses by the family unit, and not just the land visit by the initial responder.
    Materialart: Digitale Medien
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  • 7
    Digitale Medien
    Digitale Medien
    Springer
    Journal of chemical ecology 19 (1993), S. 1491-1500 
    ISSN: 1573-1561
    Schlagwort(e): Castor canadensis ; beaver castor sac ; phenolic compounds ; coinjection ; fractionation ; synthesis ; identification ; territory marking
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie
    Notizen: Abstract North American beaver (Castor canadensis) mark their territories with castoreum, the contents of their castor sacs. In their territories, beaver respond with scent marking to experimental scent marks consisting of castoreum, or selected single components. In part, the unique odor of castoreum is due to large amounts of phenolic compounds. Purified phenolic components were analyzed by GC, GC-MS, and NMR; identifications were confirmed by comparing the spectra of synthetic phenols with those of the isolated phenols. Of the 15 phenols reported elsewhere, only five were confirmed in our analysis; the other 10 phenolic compounds are either absent or are not volatile enough to be detected by our methods. In addition, 10 phenolic compounds have been identified in this study that were not reported in the previous papers concerning the constitution of castoreum.
    Materialart: Digitale Medien
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  • 8
    Digitale Medien
    Digitale Medien
    Springer
    Journal of chemical ecology 6 (1980), S. 905-909 
    ISSN: 1573-1561
    Schlagwort(e): Black-tailed deer ; deer ; Flehmen ; mammals ; pheromones ; reproductive behavior ; urine
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie
    Notizen: Abstract Male black-tailed deer were exposed to conspecific urine samples monthly for one year. The urine samples tested were from adult male, nonestrous female, estrous female, male fawn, and female fawn. The urine was offered with and without a wire screen cover; Flehmen occurred only when direct mouth and/or tongue contact with the urine was possible. The frequency of Flehmen varied seasonally, and urine from adults released more Flehmen than urine from fawns. But there was no difference in Flehmen frequency in response to urine from adult males or estrous or nonestrous females, when presented out of context, although in a natural situation males respond more to urinating females than males.
    Materialart: Digitale Medien
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  • 9
    Digitale Medien
    Digitale Medien
    Springer
    Virchows Archiv 370 (1976), S. 85-96 
    ISSN: 1432-2307
    Schlagwort(e): Malignant and benign lymphoma ; Immunocytoma ; Centroblastic malignant lymphoma ; Castleman Tumor ; Eye, lid and orbit ; Histologic features
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Beschreibung / Inhaltsverzeichnis: Zusammenfassung In der vorliegenden Studie wurden 23 Lymphome der Augen-, Lid- und Orbitalregion ausgewertet. Sie stammten aus einem nicht ausgewählten bioptischen Untersuchungsgut des Pathologischen Instituts der Universität Kiel und des Lymphknotenregisters bei der Deutschen Gesellschaft für Pathologie. Es handelte sich dabei um 12 maligne und 11 benigne Lymphome. Die malignen Lymphome stellten jeweils Non-Hodgkin-Lymphome dar. Unter den letzteren fanden wir elfmal ein Immunocytom, ein malignes Lymphom mit niedrigem Malignitätsgrad — dagegen nur einen Fall eines malignen Lymphoms mit hohem Malignitätsgrad, ein centroblastisches Lymphom. Die Diagnose eines benignen Lymphoms wurde jeweils durch die von uns erhobenen katamnestischen Angaben bestätigt. Während sich das benigne Lymphom in 7 von 11 Fällen in der Conjunctiva entwickelt hatte, war dies bei nur 2 von 11 Fällen mit Immunocytom zu beobachten. Das Immunocytom stellt einen Tumor dar, der aus Lymphocyten und Plasmazellen oder plasmocytoiden Zellen besteht und meist PAS-positive globuläre Einschlüsse in Kern und/oder Cytoplasma der Plasma- oder plasmocytoiden Zellen aufweist.
    Notizen: Summary Twenty-three lymphomas of the eye, eyelid, and orbit were chosen for study from biopsy material of the Department of Pathology, University of Kiel, and the Lymph Node Registry in Kiel. There were 12 malignant non-Hodgkin's lymphomas and 11 benign lymphomas. Catamnestic examination confirmed the histologic diagnosis in all 11 cases of benign lymphoma. Eleven of the malignant lymphomas represented immunocytomas and were therefore of low-grade malignancy. In contrast, there was only one case of malignant lymphoma of high-grade malignancy, which was diagnosed as centroblastic lymphoma. The immunocytoma was retrobulbar in one third of our cases and conjunctival in only 2 cases, whereas benign lymphoma had developed in the conjunctiva in 7 of 11 cases. Immunocytoma represents a tumor composed of lymphocytes and plasma cells or plasmacytoid cells. PAS-positive globular inclusions are usually found in the nucleus and/or cytoplasm of the plasma cells or plasmacytoid cells.
    Materialart: Digitale Medien
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  • 10
    Digitale Medien
    Digitale Medien
    Springer
    Journal of chemical ecology 20 (1994), S. 3063-3081 
    ISSN: 1573-1561
    Schlagwort(e): Castor canadensis ; beaver ; castoreum ; communication ; social odors ; phenolic compounds ; neutral compounds ; territorial behavior ; response measures
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie
    Notizen: Abstract North American beaver (Castor canadensis) mark their territories with castoreum, a chemically complex secretion from their castor sacs. The phenolic and neutral fractions of castoreum have been shown to elicit specific behavioral responses from beavers in a field setting. Our objective was to identify compounds/mixtures that evoked responses similar to those stimulated by castoreum. We assayed recently identified phenolic compounds, some phenolics that had been determined to be biologically active in previous studies, the neutral compound borneol, and combinations of phenolic compounds, neutral compounds, and the two combined. Biological activity was measured by the elicitation and extent of specific responses and their strength (duration, frequency, and proportion of beavers responding). Generally, single compounds stimulated fewer responses than mixtures. A 26-compound mixture of phenolic and neutral compounds elicited responses in a similar proportion of trials as castoreum. However, responses to castoreum were stronger than to any synthetic sample. Further investigation of different measures of response, namely, elicitation, completeness, and strength, are deemed necessary to fully decipher the design of social odors.
    Materialart: Digitale Medien
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