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  • 1
    Monograph available for loan
    Monograph available for loan
    Photographic guide to wildflowers of South Africa (2003)
    Pretoria : Briza
    Details Availability
    Call number: PIK N 630-15-89116
    Type of Medium: Monograph available for loan
    Pages: 352 S. , überw. Ill. , 25 cm
    Edition: 1st ed.
    ISBN: 1875093427
    Language: English
    Location: A 18 - must be ordered
    Branch Library: PIK Library
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  • 2
    Electronic Resource
    Electronic Resource
    Solubility of Benzamide in m-Xylene. (1963)
    s.l. : American Chemical Society
    Journal of chemical & engineering data 8 (1963), S. 234-234 
    Details
    ISSN: 1520-5134
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/je60017a029
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  • 3
    Electronic Resource
    Electronic Resource
    DECIDUAL ALKALINE PHOSPHATASE ACTIVITY IN THE PREGNANT AND PSEUDOPREGNANT RAT (1969)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 166 (1969), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1969.tb54298.x
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  • 4
    Electronic Resource
    Electronic Resource
    Vitamins A and D in Fish Oils (1930)
    s.l. : American Chemical Society
    Industrial & engineering chemistry 22 (1930), S. 1361-1363 
    Details
    ISSN: 1520-5045
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ie50252a032
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  • 5
    Electronic Resource
    Electronic Resource
    Preserving the evolutionary potential of floras in biodiversity hotspots (2007)
    [s.l.] : Nature Publishing Group
    Nature 445 (2007), S. 757-760 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] One of the biggest challenges for conservation biology is to provide conservation planners with ways to prioritize effort. Much attention has been focused on biodiversity hotspots. However, the conservation of evolutionary process is now also acknowledged as a priority in the face of global ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nature05587
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  • 6
    Electronic Resource
    Electronic Resource
    Feast/famine growth environments and activated sludge population selection (1985)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 27 (1985), S. 562-568 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The effect of feast/famine growth conditions on activated sludge cultures indicates that nonfilamentous cultures can be selected by providing proper substrate gradients and extended periods of endogenous metablism. Reactor operating strategies providing intermittently high substrate concentrations result in cultures characterized by high peak substrate and oxygen uptake activities, rapid settling rates, and high resistance to starvation. Sludge settleability can be manipulated using controlled variations in growth environment with corresponding changes noted in sludge activity. In combination with the low net growth rates associated with activated sludge systems, feast/famine environments would logically convey a selection advantage to microbes capable of readily assimilating substrate materials and maintaining viability during extended starvation periods.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260270503
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  • 7
    Electronic Resource
    Electronic Resource
    Notes on the pollination mechanisms ofMoraea inclinata andM. brevistyla (Iridaceae) (1989)
    Springer
    Plant systematics and evolution 163 (1989), S. 201-209 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Iridaceae ; Moraea inclinata ; M. brevistyla ; Bees ; Anthophoridae ; Halictidae ; Pollination mechanism ; flower morphology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Individual flowers ofMoraea inclinata are nectariferous and last about six hours. They appear to be pollinated largely by bees in the familyHalictidae (Lasioglossum spp.,Nomia spp.,Zonalictus) and to a lesser extent by bees in the familyAnthophoridae (Amegilla). The mechanism of bee-pollination inM. inclinata is the “Iris type”; i.e., each flower consists of three pollination units (an outer tepal, a partly exserted anther, and the opposed style branch which terminates in a pair of petal-like crests). Bees rarely visit more than one pollination unit per flower. Transferral of pollen to the bee is passive and nototribic although all bees collected on the flowers were female and 55% of the bees carried pollen loads with 2–5 pollen taxa in their scopae.Moraea brevistyla flowers are nectariferous but lack scent and last two days. They are visited infrequently by bees and only one femaleLasioglossum spec. carried the pollen ofM. brevistyla. Unlike flowers ofM. inclinata those ofM. brevistyla deposit pollen only on the head and thorax. Bee-mediated autogamy in both species is avoided due to the erratic foraging patterns of the bees and the flexibility of each stigma lobe as the bee backs out of the flower. Approximately 2–4 flowers in the inflorescences of both species (6–8 flowers/infloresence) develop into capsules.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00936515
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  • 8
    Electronic Resource
    Electronic Resource
    Metabolism of 2,4,6-trinitrotoluene by aPseudomonas consortium under aerobic conditions (1994)
    Springer
    Current microbiology 28 (1994), S. 131-137 
    Details
    ISSN: 1432-0991
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract An aerobic bacterial consortium was shown to degrade 2,4,6-trinitrotoluene (TNT). At an initial concentration of 100 ppm, 100% of the TNT was transformed to intermediates in 108 h. Radiolabeling studies indicated that 8% of [14C]TNT was used as biomass and 3.1% of [14C]TNT was mineralized. The first intermediates observed were 4-amino-2,6-dinitrotoluene and its isomer 2-amino-4,6-dinitrotoluene. Prolonged incubation revealed signs of ring cleavage. Succinate or another substrate—e.g., malic acid, acetate, citrate, molasses, sucrose, or glucose—must be added to the culture medium for the degradation of TNT. The bacterial consortium was composed of variousPseudomonas spp. The results suggest that the degradation of TNT is accomplished by co-metabolism and that succinate serves as the carbon and energy source for the growth of the consortium. The results also suggest that this soil bacterial consortium may be useful for the decontamination of environmental sites contaminated with TNT.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01571053
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  • 9
    Electronic Resource
    Electronic Resource
    Use of Trinitrobenzene as a Nitrogen Source by Pseudomonas vesicularis Isolated from Soil (1997)
    Springer
    Current microbiology 34 (1997), S. 192 -197 
    Details
    ISSN: 1432-0991
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract. An aerobic Gram-negative bacterium identified as Pseudomonas vesicularis was isolated from soil contaminated with 2,4,6-trinitrotoluene (TNT) and 1,3,5-trinitrobenzene (TNB). This bacterium used TNB as the sole source of nitrogen. The TNB was metabolized within 80 h of incubation. The major metabolites produced were dinitroaniline, dinitrobenzene (DNB), nitroaniline, nitrobenzene (NB), and ammonia. The concentrations of DNB and NB produced in the culture medium were nearly stoichiometric. The ammonia concentration in the culture medium increased during the course of incubation. The end product of TNB metabolism was NB, which did not undergo further degradation even after long incubation time. This bacterium could be used in a syntrophic culture system with other NB-degrading bacteria to remove TNB completely from soil and water at contaminated sites.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002849900167
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  • 10
    Electronic Resource
    Electronic Resource
    Metabolism of Explosive Compounds by Sulfate-Reducing Bacteria (1998)
    Springer
    Current microbiology 37 (1998), S. 127-131 
    Details
    ISSN: 1432-0991
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract. The metabolism of various explosive compounds—1,3,5-trinitrobenzene (TNB), hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX), and octahydro-1,3,5,7-tetranitro-1,3,5,7-tetraazocine (HMX)—by a sulfate-reducing bacterial consortium, Desulfovibrio spp., was studied. The results indicated that the Desulfovibrio spp. used all of the explosive compounds studied as their sole source of nitrogen for growth. The concentrations of TNB, RDX, and HMX in the culture media dropped to below the detection limit (〈0.5 ppm) within 18 days of incubation. We also observed the production of ammonia from the nitro groups of the explosive compounds in the culture media. This ammonia served as a nitrogen source for the bacterial growth, and the concentration of ammonia later dropped to 〈0.5 mg/L. The sulfate-reducing bacteria may be useful in the anaerobic treatment of explosives-contaminated soil.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002849900350
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