970 research outputs found
Effect of cutting management and nitrogen supply on yield and quality of Napier grass (Pennisetum purpureum)
No full textIn a series of cutting experiments, average apparent nitrogen recovery of applied fertilizer N by Napier grass was approximately 50%. Incorporation of cattle manure improved nitrogen utilization. Mixtures with Desmodium intortum substantially improved yield and protein content. There was a fair to good relation between morphology and crude protein content and in vitro organic matter digestibility of Napier grass
Dr. Herman S. Hettinger Papers
No full textDr. Hettinger was an executive, legal advisor, academic and author, whose long and varied career frequently brought him into the business of radio broadcasting. The collection documents Hettinger's legal advising work in two cases
Penis extrusions by humpback whales (Megaptera novaeangliae) on the Hawaiian winter grounds.
No full textThe annual winter assembly of humpback whales (Megaptera novaeangliae) in tropical waters has been linked to reproductive activities, including birthing, calf-rearing, and mating. However, the sexual behaviour of this species remains largely undescribed and mating has never been witnessed. We examined 121 h of underwater videotaped footage of humpback whales obtained over five winter seasons in Hawaiian waters for evidence of penis extrusions by whales engaged in various activities in a range of social groups. In 630 different pods containing videotaped males, we noted 13 penis extrusion incidents. Penis extrusions were performed by lone singers (2 incidents), by the single escort to a mother/calf pair (6 incidents), and by principal and secondary escorts in competitive pods containing a female either with a calf (2 incidents) or without (3 incidents). All penis extrusions were brief (mean=44.0) s). Body length measurements (mean=11.53 m, SD=0.46 m, range=10.64 m to 12.05 m) were obtained using underwater videogrammetry on seven penis extruders, and suggested that the majority were sexually mature. Each penis extrusion in a competitive pod coincided with the penis extruder chasing another whale, and in four of five cases appeared to be directed toward another male. In the remaining case, the extruder appeared to attempt mating with a mother. Our findings suggest that penis extrusions in humpback whale competitive pods are often a concomitant of dominance contests between males
Manajemen bintang lima : aplikasi manajemen militer di arena bisnis (konsep strategis)/ Napier
No full text194 hal.; 21 cm
Manajemen bintang lima : aplikasi manajemen militer di arena bisnis (konsep strategis)/ Napier
No full text194 hal.; 21 cm
Manajemen bintang lima : aplikasi manajemen militer di arena bisnis (konsep strategis)/ Napier
No full text194 hal.; 21 cm
Manajemen bintang lima : aplikasi manajemen militer di arena bisnis (konsep strategis)/ Napier
No full text194 hal.; 21 cm
Manajemen bintang lima : aplikasi manajemen militer di arena bisnis (konsep strategis)/ Napier
No full text194 hal.; 21 cm
Male mate choice and male-male competition coexist in the humpback whale (Megaptera novaeangliae).
No full textMale humpback whales (Megaptera novaeangliae) outnumber females on the winter grounds and compete physically for proximity to females. Analyses of identification photographs collected in Hawai¢i from 1976 through1995 and scan samples collected in 1998 showed that (i) reproductive potential (calving rate) for the following winter was greater for females without a calf than females with a calf, (ii) females without a calf were less likely to be found alone and more likely to be found in large pods than females with a calf, (iii) individual females were found in larger pods when without a calf than when with a calf, (iv) the probability of females with a calf being escorted by one or more males increased as the reproductive season progressed, and (v) head lunges occurred more commonly in all-adult pods than in pods containing a calf. We concluded that male humpback whales associate preferentially with females with high reproductive potential, that the attractiveness of individual females varies with their status (with a calf versus without a calf), that males become progressively less choosy over the course of the reproductive season as females without a calf become increasingly rare on the winter grounds, and that males expend more energy in competition over females without a calf than females with a calf
Dutch cultural heritage of Fredrik Ruijsch and Herman Boerhaave in the Military Medical Academy named after S. M. Kirov
No full textDuring historical research into the Russian physician Nikolay Ivanovich Pirogov (1810–1881)
and his relation to Dutch scientists in shaping Russian medical science, access was allowed to
the first author of this manuscript to the fundamental library of the Military Medical Academy
named S. M. Kirov. The library is one of the oldest libraries in Russia and was founded by Pavel
Zakharyevich Condoidi, a pupil of the Dutch scientist Herman Boerhaave. Condoidi succeeded
the oldest nephew of Herman Boerhaave, Herman Kaau-Boerhaave after his death as director
of the Russian Meditsinskaya Kantselyariya (Ministry of Healthcare). At this site, the extensive
library and personal notes of Hermann Boerhaave and his nephews are kept. Later on, it appeared
that the same Academy also had a collection of artefacts that are attributed to the famous
anatomist Frederik Ruijsch. These artefacts were acquired during the first visit of Peter the Great
to the Netherlands. To understand how these artefacts and archive of Boerhaave had become
part of the Academy’s collection, we delved into the common medical history of Russia and the
Netherlands. In this manuscript, we will lift a tip of the veil regarding the archives of Herman
Boerhaave and the “small” anatomical and zoological collections of Fredrik Ruijsch
- …
