2,331 research outputs found
A VON LIEBIG MODEL FOR WATER AND NITROGEN CROP RESPONSE
No full textThe century-old “law of the minimum” proposed by von Liebig was tested using five independent sets of crop response data on wheat, corn, cotton, silage, and sugar beets. The rival models were polynomial functions reported in the literature as the most suitable models for interpreting those data. Overall, the von Liebig model performed very well. While the nonnested hypothesis test was inconclusive with regard to silage and sugar beets, the von Liebig model rejected the polynomial specifications for wheat, corn and cotton.Crop Production/Industries,
Justus von Liebig
No full textThis is a short overview of the life and achievements of Justus von Liebig. Clearly, this can only be an incomplete and somewhat personal view of the author, who has been a professor of inorganic chemistry at Justus Liebig University since 2002. Having already been interested in the work of Liebig for many years, and with a strong connection to the Liebig Museum in Giessen, the author hopes to provide some useful information about this great chemist, one of the founders of modern chemistry. The reader should find many interesting, probably new, facts about Liebig’s major impact on chemistry, agriculture, nutrition, and pharmacology
Cryptocheilus schakuhensis Egger & Liebig 2019
No full textCryptocheilus schakuhensisSCHMID-EGGER & LIEBIGnov.sp. (figs 10 -18) H o l o t y p e: 1♀ 04.vii.2018 Amol (Mazandaran) 36.400 N, 52.343 E leg. Liebig, coll. SDEI (Müncheberg). P a r a t y p e s: 1♀ 06.vii.2018 Pol Aram (Golestan) 36.920 N, 55.115 E; 1♀ 02.vii.2018 Ziarat, mountain road (Golestan) 36.680 N, 54.564 E; 1♂ 05.vii.2018 Ziarat, plateau (Golestan) 2299 m 36.696 N, 54.575 E; 1♀ 08.vii.2018 Hossein Abad (Semnan) 37.197 N, 55.702 E all leg. Liebig, coll. Liebig and CSE. R e m a r k: The genus Cryptocheilus is under revision by the senior author. There is no key for species from Iran available, and species can only be recognized by original descriptions. D i a g n o s i s: The female of C. schakuhensis nov.sp. is characterized by colour pattern. It is all black with lateral white spots on T2 and a medial white spot on T4. Inner eye margin has a small white spot. This colour pattern is unique among Cryptocheilus species from the palearctic region. The male is all black, with lower inner eye margin white, and innerside of foretibia orange-red. Wing colour is distinctive: Wings are yellowish-grey infuscate, with wing apex dark with violet shimmer. D e s c r i p t i o n f e m a l e: Body length 13.5 mm. Colour: Black, the following parts whitish (with some yellow tinge): Small round spot on inner eye margin medially, small irregular spot near hindmargin of mesoscutum, large triangular spots on T2 laterally, large oval spot on T4 medially. Mandible medially and foretibia apically with some red. Wings infumate yellowish-greyish, apex dark. Apical clypeal margin emarginated in whole width. Metapostnotum narrow. Propodeum with fine, crosswise striation. Tergites without punctures. Otherwise similar to Crypocheilus elegans. V a r i a t i o n i n f e m a l e s p a r a t y p e s: Paratypes are smaller, 9.5-11.0 mm, and agree otherwise with holotype. D e s c r i p t i o n m a l e: Body length 11.5 mm. Black, large triangular band on inner eye margin (between antennal socket and clypeus) whitish. Innerside of foretibia and small spot on apex of forefemora reddish. Clypeus laterally, lower mesopleuron and coxa with thin silver pubescence. Wings as in females, but contrast between greyyellowish part and dark apex is more distinct as in females. Metapostnotum 0.6x as long as metatnotum, with some distinct rugae. Striation of propodeum coarser as in females. S8 flat, with indistinct medial keel, apically truncate, with a row of short setae around margin in apical half of S8. Genital see fig. 17, SGP see fig. 18. E t y m o l o g y: The species is named after the mountain Schah Kuh north of Bastam close to the type area. D i s t r i b u t i o n: Northern Iran.Published as part of Egger, Christian Schmid- & Liebig, Wolf-Harald, 2019, New records of Spider Wasps (Hymenoptera, Pompilidae) from northern Iran with description of a new species, pp. 1195-1203 in Linzer biologische Beiträge 51 (2) on pages 1198-1199, DOI: 10.5281/zenodo.374226
Linked-Employer-Employee (LEE) Daten in der Organisationsforschung
No full textWeinhardt M, Jacobebbinghaus P, Liebig S. Linked-Employer-Employee (LEE) Daten in der Organisationsforschung. In: Liebig S, Matiaske W, Rosenbohm S, eds. Handbuch Empirische Organisationsforschung. Wiesbaden: Springer Gabler; 2017: 1-28
Kiri krahv Sergei Uvarovile
No full textLiebig, Justus von, 1803-1873, saksa keemik, Peterburi TA liigePalub adressaati, et see aitaks muretseda üliõpilasele W-le loa keemia õppimiseks Giesseni
Justus Liebig - Life and Work
No full textZadanie pt. Digitalizacja i udostępnienie w Cyfrowym Repozytorium Uniwersytetu Łódzkiego kolekcji czasopism naukowych wydawanych przez Uniwersytet Łódzki nr 885/P-DUN/2014 zostało dofinansowane ze środków MNiSW w ramach działalności upowszechniającej naukę
Philosophy of ecology of Justus von Liebig: different Liebig
No full textGerman chemist Justus von Liebig is known in the ecological literature as the author of “Liebig’s law of the minimum”. But the law of the minimum is absent in his publications, which ecologists cite. The “law” is nothing more than an interpretation of some of Liebig’s statements. However, irrespective of the law of the minimum, Liebig’s outstanding contribution to the theory of ecology is obvious: Liebig was one of the first who drew attention to the sustainability of the phenomenon of life organized into supraorganismal systems. Liebig showed that as a result of the interaction of plants and animals and as a result of their life processes, such as nutrition and respiration, there is a continuous transformation of a substance consisting of the same elements. On the example of the constancy of the gas composition of the atmosphere, Liebig comes to a generalization that is crucial for ecology: the interaction of plants and animals is a factor of sustainability of their own environment, which they create themselves and support for an unlimited time in a stable state.Немецкий химик Юстус Либих известен в экологической литературе как автор “закона минимума Либиха”. Но в его публикациях, на которые ссылаются экологи, закон минимума отсутствует. “Закон” представляет собой не что иное, как интерпретацию некоторых высказываний Либиха. Тем не менее безотносительно к закону минимума выдающийся вклад Либиха в теорию экологии очевиден: он был одним из первых, кто обратил внимание на устойчивость феномена жизни, организованного в надорганизменные системы. Либих показал, что в результате взаимодействия растений и животных, а также процессов их жизнедеятельности, таких как питание и дыхание, происходит непрерывное преобразование вещества, состоящего из одних и тех же элементов. На примере постоянства газового состава атмосферы Либих приходит к ключевому для экологии обобщению: взаимодействие растений и животных является фактором устойчивости их собственной среды обитания, которую они сами создают и неограниченно долго поддерживают в устойчивом состоянии
Methodische Probleme in der empirischen Organisationsforschung
No full textLiebig S, Matiaske W, eds. Methodische Probleme in der empirischen Organisationsforschung. 1st ed. Wiesbaden: Gabler Verlag; 2016
Justus von Liebig und August Wilhelm Hofmann in ihren Briefen (1841-1873) hrsg. von W. H. Brock
No full textJacques Jean. Justus von Liebig und August Wilhelm Hofmann in ihren Briefen (1841-1873) hrsg. von W. H. Brock. In: Revue d'histoire des sciences, tome 39, n°3, 1986. Etude sur l'histoire du calcul infinitésimal. p. 281
The Justice of Earnings in Dual-Earner Households
No full textLiebig S, Sauer C, Schupp J. The Justice of Earnings in Dual-Earner Households. SOEPpapers. Berlin: DIW; 2009
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