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1Latest Papers from Table of Contents or Articles in PressM. B. Gerstein ; A. Kundaje ; M. Hariharan ; S. G. Landt ; K. K. Yan ; C. Cheng ; X. J. Mu ; E. Khurana ; J. Rozowsky ; R. Alexander ; R. Min ; P. Alves ; A. Abyzov ; N. Addleman ; N. Bhardwaj ; A. P. Boyle ; P. Cayting ; A. Charos ; D. Z. Chen ; Y. Cheng ; D. Clarke ; C. Eastman ; G. Euskirchen ; S. Frietze ; Y. Fu ; J. Gertz ; F. Grubert ; A. Harmanci ; P. Jain ; M. Kasowski ; P. Lacroute ; J. Leng ; J. Lian ; H. Monahan ; H. O'Geen ; Z. Ouyang ; E. C. Partridge ; D. Patacsil ; F. Pauli ; D. Raha ; L. Ramirez ; T. E. Reddy ; B. Reed ; M. Shi ; T. Slifer ; J. Wang ; L. Wu ; X. Yang ; K. Y. Yip ; G. Zilberman-Schapira ; S. Batzoglou ; A. Sidow ; P. J. Farnham ; R. M. Myers ; S. M. Weissman ; M. Snyder
Nature Publishing Group (NPG)
Published 2012Staff ViewPublication Date: 2012-09-08Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsKeywords: Alleles ; Cell Line ; DNA/*genetics ; *Encyclopedias as Topic ; GATA1 Transcription Factor/metabolism ; Gene Expression Profiling ; Gene Regulatory Networks/*genetics ; Genome, Human/*genetics ; Genomics ; Humans ; K562 Cells ; *Molecular Sequence Annotation ; Organ Specificity ; Phosphorylation/genetics ; Polymorphism, Single Nucleotide/genetics ; Protein Interaction Maps ; RNA, Untranslated/genetics/metabolism ; Regulatory Sequences, Nucleic Acid/*genetics ; Selection, Genetic/genetics ; Transcription Factors/*metabolism ; Transcription Initiation SitePublished by: -
2Articles: DFG German National LicensesStaff View
ISSN: 1573-5036Source: Springer Online Journal Archives 1860-2000Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, NutritionNotes: Summary In order to obtain an insight into the fertility state of a soil under different agricultural crops the intensity of the living dynamics in such soils together with their humus dynamics were studied. Formazan formation (Dehydrogenase test) and oxygen consumption (Warburg method) were used for the characterisation of the biological activity of the soils, whereas the acriflavine adsorption capacity of humus served as a means to follow the humus turnover in the soils. Although the dehydrogenase activity of a soil may serve as a quick and preliminary ‘over-all’ enzyme test for the evaluation of its biological potentialities, only the oxygen consumption, measured manometrically, in connection with the determination of the humus turnover during long periods of incubation by its acriflavine adsorption opens possibilities to study soil fertility problems under biological considerations. Furthermore, the data suggest to follow the quality of the biological activity by plotting the extinction values of the total humus extracted in order to characterize the fluctuations and shifting of the individual components in the ‘humus spectrum’ of the soil samples.Type of Medium: Electronic ResourceURL: -
3Articles: DFG German National LicensesStaff View
ISSN: 1573-5036Source: Springer Online Journal Archives 1860-2000Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, NutritionNotes: Summary Humic compounds isolated from decomposing wheat and rye straw, incubated for different periods with and without nitrogen added, were investigated for their acriflavine adsorption capacity and light absorption property. In the first instance, it was established that the degree of dyestuff adsorption on the acid-precipitable humic compounds is correlated with the extent in optical density of the total humus extracted by weak alkaline solution. Furthermore, the influence of nitrogen added on the rate of humification could be followed closely by the adsorption and absorption characteristics. It was demonstrated that the initially increased rate of humus formation, achieved by the addition of nitrogen, was compensated for by a decrease of such compounds when the experimental period was extended. It seems, that humic substances, after exhaustion of the easily available carbon and nitrogen sources, may again play a role in the metabolic cycle of the micro-organisms.Type of Medium: Electronic ResourceURL: -
4Articles: DFG German National LicensesStaff View
ISSN: 1573-5036Source: Springer Online Journal Archives 1860-2000Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, NutritionNotes: Summary The thought that a soil under prevailing climatic conditions receives the most significant impulse from its vegetational cover together with the biochemical activity of micro-organisms living in it, has suggested the study of soil biodynamics under the different members of a crop-rotation system. Whereas formazan formation served as index for the biological activity of soil, changes in amount and composition of humic compounds isolated from the same soil were followed by their acriflavine adsorption capacity and optical-density behaviour, both disclosing the fluctuating residual power in such a soil. Moreover, pH measurements and slaking experiments gave additional information on the effects of vegetation on soil. It became evident that a continued and close-growing crop is of primary importance for the establishment and maintenance of an optimal humus level in a loamy sand of the summer-rainfall region of a semiarid country. The ploughing-up of the grassley for seedbed preparations resulted in an immediate drop of the humus content, built-up during the previous years in such a soil. Natural veldt, not undergoing any management, and which may be regarded therefore as completely undisturbed, accumulated the highest amount of humus in its environment. A crop-rotation system with grass and other suitable plant associations included may well be in the position to make the best use out of the soil by mobilizing and, at the same time, renewing continuously its “biotic potential”. On the other hand, monoculture with row crops as maize, leaving large spaces of soil unprotected against drastic climatic influences, and undergoing major mechanical treatments, for instance, frequent mechanical weeding, will open the soil for wind and water erosion through deterioration of its “biological resistance” unless management procedures are better adapted to environment. It seems that the study of the “physiology” of soil, which coincides in part with the interactions between plant and soil, is a very useful tool in the offensive strategy to improve agriculture in extreme climatic zones.Type of Medium: Electronic ResourceURL: -
5Articles: DFG German National LicensesStaff View
ISSN: 1573-5036Source: Springer Online Journal Archives 1860-2000Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, NutritionNotes: Summary Humic substances were extracted with six different solvents (acetone, dioxane, ethanol, formic acid plus lithium bromide, sodium hydroxide plus stannous chloride and tris-EDTA boric-acid buffer) from soil under permanent maize, crop rotation, grass (Eragrostis curvula) and natural veld. The extracts were fractionated by column electrophoresis. The fractionation was followed by ultraviolet absorption. It is postulated that the quantity of lowmolecular weight humic substances rather than total humic-substance concentration should give an indication of soil fertility. From the results obtained the relative fertility status of the soil under different vegetational cover were determined. re]19740117Type of Medium: Electronic ResourceURL: -
6Articles: DFG German National LicensesStaff View
ISSN: 1573-5036Source: Springer Online Journal Archives 1860-2000Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, NutritionNotes: Summary Humic compounds isolated from decomposing wheat and rye straw, incubated for different periods with and without nitrogen added, were investigated for their acriflavine adsorption capacity and light absorption property. In the first instance, it was established that the degree of dyestuff adsorption on the acid-precipitable humic compounds is correlated with the extent in optical density of the total humus extracted by weak alkaline solution. Furthermore, the influence of nitrogen added on the rate of humification could be followed closely by the adsorption and absorption characteristics. It was demonstrated that the initially increased rate of humus formation, achieved by the addition of nitrogen, was compensated for by a decrease of such compounds when the experimental period was extended. It seems, that humic substances, after exhaustion of the easily available carbon and nitrogen sources, may again play a role in the metabolic cycle of the micro-organisms.Type of Medium: Electronic ResourceURL: