Influence of sulphur supply on glucose and ATP concentrations of inoculated broad beans (Vicia faba minor L.)     

S. Pacyna  M. Schulz  H. W. Scherer 《Biology and Fertility of Soils》2006,42(4):324-329

In the present study, the influence of S supply on S concentrations, N₂ fixation, available amounts of glucose and adenylates of Vicia faba minor L. were weekly investigated, starting 6 weeks after sowing. Glucose was determined photometrically in shoots, roots and nodules and in ATP, ADP and AMP by bioluminescence in roots, mitochondria and bacteroids. Sulphur deficiency resulted in significantly lower S concentrations of shoots, roots and nodules, in a reduced N₂ fixation as well as in significantly lower amounts of glucose in shoots and nodules. In roots and bacteroids, S deficiency resulted in lower ATP concentrations, while the influence of S supply on ADP and AMP was less pronounced. With optimum S supply, the available amounts of glucose and ATP were strongly influenced by flower formation and seed development. Dedicated to Prof. Dr. Dr. h.c. W. Werner on the occasion of his 75th birthday.  相似文献   

Characterization of peppercorn, pepper oil, and pepper oleoresin by vibrational spectroscopy methods     

Schulz H  Baranska M  Quilitzsch R  Schütze W  Lösing G 《Journal of agricultural and food chemistry》2005,53(9):3358-3363

NIR-FT-Raman as well as ATR-IR and NIR spectroscopy in combination with efficient chemometric algorithms was applied for rapid determination of piperine in black and white ground pepper and green whole pepper berries as well as pepper oleoresins. Most of the well-resolved Raman signals detected in the spectra of pepper and the related oleoresins can be assigned to piperine, which is known to be the main pungent principle in these products. On the basis of the specific key bands of piperine, also selective Raman mappings were successfully performed to determine the in situ distribution of the alkaloid in the whole green berry and the dried peppercorn as well. It was found that piperine occurs more or less in the whole perisperm of the green fruit. Furthermore, the content and composition of the volatile fraction in various pepper samples were determined by applying the mentioned vibrational spectroscopy techniques. Whereas only NIRS measurements present sufficient reliability to predict the main essential oil substances directly in ground black and white pepper, all spectroscopy methods applied in this study can be used to analyze individual terpenoids in the hydrodistilled oil. It can be assumed that some of the new, efficient vibrational spectroscopy methods have the potential to replace the standard analysis procedures presently applied for the quality control of peppercorns, pepper extracts, and pepper oil.  相似文献   

Einfluß des Belastungsgrades unterschiedlicher Böden an ausgewählten Pestizid wirkenden Chlorkohlenwasserstoffen auf deren Aufnahme durch Möhren im Gefäßversuch     

Kathrin Heinrich  Elke Schulz 《植物养料与土壤学杂志》1996,159(6):615-619

Influence of contamination of selected, pesticid effective hydrocarbons on their uptake by carrots in a pot experiment Exemplary soils from low up to higher grades of contamination with selected pesticid effective hydrocarbons (CHC) were used in a pot experiment on the uptake of these xenobiotica by carrot plants. Carrots are able to take up pesticid effective chlorinated hydrocarbons which was expected because of their oil cells and the lipophilic character of the examined substances. There is a correspondingly higher plant uptake from soils with a higher load of pollutants as from soils with a lower grade of contamination. Despite the high concentrations of beta- and alpha-HCH in the plants from the site Muldenaue (mg/kg dm] the total uptake per pot was relatively small (below 2 mg/pot). The transferfactors soil/plant show in all plant parts no enrichment of organochlorpesticides (foliage 0.021 < carrot body 0.156 < fine roots 0.975).  相似文献   

The response ofTeretriosoma nigrescens lewis (Col.: Histeridae) to the pheromone ofProstephanus truncatus (Horn) (Col.: Bostrichidae)     

Dr. J. Boeye  G. A. Laborius  F. A. Schulz 《Journal of pest science》1992,65(8):153-157

Adults of the histeridTeretriosoma nigrescens Lewis, a predator of the Larger Grain BorerProstephanus truncatus (Horn), were captured under field conditions in Costa Rica within the same pheromone traps as the stored product pest. Neither insect could be found in unbaited traps. The possible kairomonal importance of the prey's pheromone is discussed.  相似文献   

Überlegungen zu künftigen Anforderungen an Rohholz     

H. Schulz  P. Glos  G. Wegener 《European Journal of Forest Research》1988,107(1):317-325

  相似文献   

überlegungen zu künftigen Anforderungen an Rohholz     

H. Schulz  P. Glos  G. Wegener 《Forstwissenschaftliches Centralblatt》1988,107(1):317-325

In der Massivholz-Verwendung zeichnet sich die Notwendigkeit, h?here Qualit?ten bereitzustellen, immer deutlicher ab, w?hrend die Zukunftsaussichten für geringere Qualit?ten eher negativ beurteilt werden müssen. Für einheimisches Nadel- und ganz besonders für Laubrundholz hoher Qualit?t werden gute Zukunftsaussichten gesehen. Die Einstufung von Holzstaub der Buche und Eiche in die krebserzeugenden Stoffe kann sich auf den Einsatz dieser Holzarten in Spanplatten—eventuell auch in ihren anderen Verwendungen—negativ auswirken. Im Bereich der Holzwerkstoffe sind neue Plattenarten entwickelt worden, die in Konkurrenz sowohl zu Spanplatten als auch zu Schnittholz treten.  相似文献   

Aldrin and dieldrin: loss under sterile conditions     

E P Lichtenstein  J P Anderson  T W Fuhremann  K R Schulz 《Science (New York, N.Y.)》1968,159(819):1110-1111

After their application to sterile nutrient agar, both aldrin and dieldrin disappeared rather rapidly from the agar in glass-covered petri dishes. In most instances this disappearance was considerably retarded from agar inoculated with either fungi or bacteria. In the presence of microorganisms, aldrin was also epoxidized into dieldrin. Half of the applied aldrin volatilized from the agar during the first day of incubation; dieldrin volatilized more slowly and at a constant rate.  相似文献   

Insect transmission of the bacterial ring rot pathogen     

R. D. Christie  A. C. Sumalde  J. T. Schulz  N. C. Gudmestad 《American Journal of Potato Research》1991,68(6):363-372

Three species of potato-infesting insects were evaluated under laboratory and field conditions for their capability to transmitCorynebacterium sepedonicum (Spieck. & Kotth.) Skapt. & Burkh., the bacterial ring rot (BRR) pathogen of potatoes. Laboratory and field studies confirmed the vector capability of the Colorado potato beetle (CPB),Leptinotarsa decemlineata (Say) (Coleoptera: Chrysomelidae) and the green peach aphid (GPA),Myzus persicae (Sulzer) (Homoptera: Aphididae). Both adults and larvae of the CPB proved to be vectors of the pathogen. Only adult GPA were evaluated. Bacterial transmission was most likely mechanical: analyses of the CPB mouthparts stained by the indirect immunofluorescence antibody staining (IFAS) procedure confirmed the presence of the bacterium after the beetles were exposed to infected plant tissue. Eggs, haemolymph, feces, regurgitations, and macerates of the digestive tract failed to show the presence of the bacterium. The aster leafhopper,Macrosteles fascifrons (St∮al) (Homoptera: Cicadellidae) failed to acquire and transmitCorynebacterium sepedonicum.  相似文献   

Levantilides A and B, 20-membered macrolides from a Micromonospora strain isolated from the Mediterranean deep sea sediment     

Gärtner A  Ohlendorf B  Schulz D  Zinecker H  Wiese J  Imhoff JF 《Marine drugs》2011,9(1):98-108

Two new 20-membered macrolides, levantilide A and B, were isolated from the Micromonospora strain M71-A77. Strain M71-A77 was recovered from an Eastern Mediterranean deep-sea sediment sample and revealed to produce the levantilides under in situ salinity of 38.6 ‰. The chemical structures of the levantilides were elucidated on the basis of different one- and two- dimensional NMR experiments. Levantilide A exhibits a moderate antiproliferative activity against several tumor cell lines.  相似文献   

Estimation of the Influence of Humic Acid on Radionuclide Binding to Solid Residuals in Deposits of Radioactive Waste     

Olga N. Aleksandrova  Marcus Schulz  Michael Matthies 《Water, air, and soil pollution》2008,194(1-4):287-299

In contaminated water reservoirs, the sorption and binding of radionuclides to solids (SR) determines their bioavailability and transport and thus human and ecosystem exposure. In this work, the influence of organic matter (OM) on binding of the radionuclides ⁹⁰Sr, ¹³⁷Cs, sum of ²³⁵U, ²³⁸U, and sum of ²³⁹Pu, ²⁴⁰Pu to solids are investigated, using experimental data derived from ecological monitoring of radioactive waste deposits in South Ural (Russia). OM in several surface water reservoirs mainly consists of humic substance (HS) which forms humates and fulvates with radionuclides and binds to solids via different mechanisms, such as coordinating bond or covalent bond. These processes are strongly dependent on the phase of HS, which can be colloidal or soluble high-molecular compounds. Based on the spatial distribution of radionuclides, SR and OM in waste deposits, we assumed a specific influence of humic acids (HA) on the binding of radionuclides to SR, and quantified it with invariant values of a modified partitioning coefficient. The mathematical form of this invariant value emphasizes a significant impact of the local mass of HA (mHA/V) and local surface area of SR (s?=?Ssorb/V) per volume V on the processes involved in binding radionuclides to SR. These processes may retard radionuclide migration into groundwater.  相似文献