20,038,536 research outputs found
Janssen, P[eter] an Herman Grimm (1 Brief)
No full textJANSSEN, P[ETER] AN HERMAN GRIMM (1 BRIEF)
Janssen, P[eter] an Herman Grimm (1 Brief) (Br3328)
Brief 3328 (Br3328
Jules Janssen
No full textJanssen Jules, Zimmermann Maurice. Jules Janssen. In: Annales de Géographie, t. 17, n°92, 1908. p. 178
Janssen Family at Holden Beach
No full textThe Janssen famiy's annual get-together at Holden Beach, NC., on the porch of a rental house.
Top row, left to right: Michael Janssen (1962- ), Uschi Janssen (1942- , Michael's mother), Leon E. Walker, Jr. (1939- , Annette's father) holding Rita the dachshund, Christa Walker (1943- , Annette's mother), David Powell.
Second row: Annette Janssen (1962- , Michael's wife), Ilse Bartel, Michelle Powell. Dogs in the front row: Max, Galley, and Schooner
Simple models and concepts as tools for the study of sustained soil productivity in long-term experiments. I. New soil organic matter and residual effect of P from fertilizers and farmyard manure in Kabete, Kenya
No full textThe rough outcomes of a long-term experiment in Kenya were (re-)interpreted using simple models to find causes of success or failure with regard to sustained soil productivity. A two- pools model calculated the development of soil organic matter, and a practical equation estimated the residual effect of fertilizer P. Relative mineralization rate was 4 and 8% y(-1) for original and newly formed soil organic carbon (SOC). Maize yielded 0.25 and 1.1 t ha(-1) per g kg(-1) of original and new SOC, respectively. Yields of fertilized maize increased initially as a result of increasing residual effects of applied P, but decreased later presumably because SOC declined to below a critical level of 16 g kg(-1). To maintain SOC above this level, about 10 tons of farmyard manure (dry matter) must be applied annually. Agronomic nutrient use efficiencies for fertilizer N and P were low, but the residual effect of P was high. The simple model outlined half a century ago adequately calculated build-up of new soil organic matter. The estimated residual effect of fertilizer P explained increasing crop responses to repeated P applications. The absence of data on nutrient uptake by the crop strongly limited the understanding of the experimental results
A revision of the indusiate scaly tree ferns (Cyatheaceae, Cyathea subgen. Alsophila sect. Alsophila) in Madagascar, the Comoros and the Seychelles
No full textBased on the examination of herbarium specimens including numerous recent collections and on observations of most species in situ, we herein present a revision of the indusiate scaly tree ferns (Cyathea sect. Alsophila) for Madagascar, the Comoros and the Seychelles. One endemic species Occurs on the Seychelles and three taxa (one endemic) are found on the Comoros. For Madagascar, we describe 55 taxa (40 species and 15 varieties), 5 1 of which arc endemic. Among these, 11 species and 12 varieties are new. The species newly described for Madagascar comprise C basirotundata Rakotondr. & Janssen, C. conferta Janssen & Rakotondr., C. dilatata Rakotondr. & Janssen, C. emilei Janssen & Rakotondr., C hebes Janssen & Rakotondr., C lisiae Janssen & Rakorondr., C. longispina Janssen & Rakotondr., C. meridionalis Janssen & Rakotondr., C. obtecta Rakotondr. &,Janssen, C. pseudo-bellisquamata Janssen & Rakotondr., and C valdesquamata Janssen & Rakotondr. The newly described varieties are C acutula (R.M. Tryon) Janssen & Rakotondr. var. deltoidea Janssen & Rakotondr., C a. var. rufescens Janssen & Rakotondr., C. bellisquamata Bonap. var. ambrensis Janssen & Rakorondr., C. b. var. australisJanssen & Rakotondr., C boivinii Mett. ex Kuhn var. andringitrensis Janssen & Rakotondr., C A var. bevolo Janssen & Rakotondr., C A var. parahildebrandtii Janssen & Rakotondr., C decrescens Mett. ex Kuhn var. cristata Janssen & Rakotondr., C d. var. manongarivensis Janssen & Rakotondr., C. emilei var. dauphinensis Janssen & Rakotondr., C. similis C.Chr. var. leptoderma Rakotondr. & Janssen, and C s. var. montana Janssen & Rakotondr. The descriptions of previously recognized taxa have been completed and where necessary corrected. Especially such characters have been added, that can be observed only in situ, e.g. trunk morphology and measurements of the entire leaf Descriptions are accompanied by plates with detailed illustrations and by distribution maps. We thoroughly reviewed the nomenclatural status and typification of all names. We provide determination keys down to the varietal level including all taxa of Cyatheaceae of the Madagascan region. Photographic documentation of the trunk and habit of most species will facilitate determination in the field. Finally, we briefly comment on the distribution of the tree fern diversity in the Madagascan rainforests
A revision of the indusiate scaly tree ferns (Cyatheaceae, Cyathea subgen. Alsophila sect. Alsophila) in Madagascar, the Comoros and the Seychelles
No full textBased on the examination of herbarium specimens including numerous recent collections and on observations of most species in situ, we herein present a revision of the indusiate scaly tree ferns (Cyathea sect. Alsophila) for Madagascar, the Comoros and the Seychelles. One endemic species Occurs on the Seychelles and three taxa (one endemic) are found on the Comoros. For Madagascar, we describe 55 taxa (40 species and 15 varieties), 5 1 of which arc endemic. Among these, 11 species and 12 varieties are new. The species newly described for Madagascar comprise C basirotundata Rakotondr. & Janssen, C. conferta Janssen & Rakotondr., C. dilatata Rakotondr. & Janssen, C. emilei Janssen & Rakotondr., C hebes Janssen & Rakotondr., C lisiae Janssen & Rakorondr., C. longispina Janssen & Rakotondr., C. meridionalis Janssen & Rakotondr., C. obtecta Rakotondr. &,Janssen, C. pseudo-bellisquamata Janssen & Rakotondr., and C valdesquamata Janssen & Rakotondr. The newly described varieties are C acutula (R.M. Tryon) Janssen & Rakotondr. var. deltoidea Janssen & Rakotondr., C a. var. rufescens Janssen & Rakotondr., C. bellisquamata Bonap. var. ambrensis Janssen & Rakorondr., C. b. var. australisJanssen & Rakotondr., C boivinii Mett. ex Kuhn var. andringitrensis Janssen & Rakotondr., C A var. bevolo Janssen & Rakotondr., C A var. parahildebrandtii Janssen & Rakotondr., C decrescens Mett. ex Kuhn var. cristata Janssen & Rakotondr., C d. var. manongarivensis Janssen & Rakotondr., C. emilei var. dauphinensis Janssen & Rakotondr., C. similis C.Chr. var. leptoderma Rakotondr. & Janssen, and C s. var. montana Janssen & Rakotondr. The descriptions of previously recognized taxa have been completed and where necessary corrected. Especially such characters have been added, that can be observed only in situ, e.g. trunk morphology and measurements of the entire leaf Descriptions are accompanied by plates with detailed illustrations and by distribution maps. We thoroughly reviewed the nomenclatural status and typification of all names. We provide determination keys down to the varietal level including all taxa of Cyatheaceae of the Madagascan region. Photographic documentation of the trunk and habit of most species will facilitate determination in the field. Finally, we briefly comment on the distribution of the tree fern diversity in the Madagascan rainforests
Non-alcoholic fatty liver disease, a new and growing risk indicator for cardiovascular disease
No full textJanssen, A (reprint author), Jessa Hosp, Clin Res Dept Cardiol, Heartctr Hasselt, Stadsomvaart 11, B-3500 Hasselt, Belgium.
[email protected]
Selecting films for sex research: Gender differences in erotic film preference
No full textThe official published version can be obtained from the link below.The aim of this study was to explore gender differences in sexual responsiveness to erotic films that had been selected for their differential appeal for men and women. A secondary objective was to identify variables that influence sexual arousal and explore whether these variables differ for men and women. Fifteen men (M age = 26 yrs) and 17 women (M age = 24 yrs) were presented with 20 film clips depicting heterosexual interactions, half of which were female- and the other half male-selected, and were asked to rate the clips on a number of dimensions. Overall, men found the film clips more sexually arousing than did the women. Gender differences in arousal were negligible for female-selected clips but substantial for male-selected clips. Furthermore, men and women experienced higher levels of sexual arousal to clips selected for individuals of their own gender. Cluster regression analyses, explaining 77% of the variance for male and 65% for female participants, revealed that men's sexual arousal was dependent upon the attractiveness of the female actor, feeling interested, and both imagining oneself as a participant and watching as an observer. For women, with all variables entered, only imagining oneself as a participant contributed to sexual arousal ratings. The findings suggest that how films are selected in sex research is an important variable in predicting levels of sexual arousal reported by men and women
Choh and Janssen Funct Ecol 2023
No full textData of Choh and Janssen 2023
A tiny cuckoo: risk-dependent interspecific brood parasitism in a predatory mite. Functional Ecology </p
Choh and Janssen Funct Ecol 2023
No full textData of Choh and Janssen 2023
A tiny cuckoo: risk-dependent interspecific brood parasitism in a predatory mite. Functional Ecology </p
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