Search Results - (Author, Cooperation:J. Philp)
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1Latest Papers from Table of Contents or Articles in PressStaff View
Publication Date: 2015-08-01Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsKeywords: Agriculture/statistics & numerical data ; Biofuels/supply & distribution/utilization ; *Biomass ; Conservation of Natural Resources/*methods ; Environmental Policy/*trends ; *International Cooperation ; Plant Oils/supply & distribution ; *Policy MakingPublished by: -
2Articles: DFG German National LicensesStaff View
ISSN: 1468-2494Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: MedicineNotes: This study has evaluated the ultraviolet light transmission characteristics of human stratum corneum at the single cell level using a low light level video microscope to measure the mean percentage transmission of light at different wavelengths and the variation in transmission across the stratum corneum. Stratum corneum was isolated by an enzymic technique and examined on a low light level UV video microscope. Quantitative evaluation of the transmitted monochromatic light for the underside of the layer was measured directly using a Kontron UNIPS image processor or indirectly with a Quantimet 920 image processor after video recording. Transmission distribution histograms were obtained from samples of stratum corneum taken from human breast, scalp, abdomen and leg. Mean transmission values were also derived and compared with diffuse transmission values obtained using the same tissue mounted on an integrating sphere. The UV microscopic transmission characteristics of enzyme separated stratum corneum clearly demonstrated that this structure was not an ideal diffuser. Uniform light intensity on the surface of the stratum corneum led to areas of transmitted intensity in close proximity that differed by factors ofthree to six fold, e.g. between regions of high (〉70%) and low (〈20%) brightness. However, the average transmission was found to be compatible with published data obtained by diffuse transmission spectrophotometry, taking into account the enhanced transmission arising from stratum corneum immersion in phosphate buffered saline. This was confirmed by the elevated values obtained by diffuse transmission spectrophotometry in this study for samples of stratum corneum prepared for UV microscopy being higher than these found in published data. It is obvious from these findings that viable cells in the epidermis are not exposed to a uniform incident light intensity even when this is true for the surface of skin. Studies of skin response to ultraviolet light at the single cell level must take account of the possibility of preferential exposure of specific sites in any subsequent explanation of cell sensitivity. This is in addition to the already well established cell cycle dependent ultraviolet sensitivity.Type of Medium: Electronic ResourceURL: -
3Articles: DFG German National LicensesStaff View
ISSN: 1365-2133Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: MedicineType of Medium: Electronic ResourceURL: -
4Articles: DFG German National LicensesStaff View
ISSN: 0005-2736Keywords: Lipid peroxidation ; Membrane filtration ; Phospholipid vesicle ; Photo-oxidationSource: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: BiologyChemistry and PharmacologyMedicinePhysicsType of Medium: Electronic ResourceURL: -
5Articles: DFG German National LicensesStaff View
ISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] Table 1. COMPOSITION OF DIETS Control Suspect Control basal diet Brazilian meal Indian meal (per cent) (per cent) (per cent) Casein + 0-75 per cent L-cystine 20-15 20-15 20-15 Groundnut oil 10 10 10 Starch 57-85 37-85 37-85 Cellulose 6 6 6 Jones Foster salt mixture * 4 4 4 Wheat germ ...Type of Medium: Electronic ResourceURL: -
6Articles: DFG German National LicensesVAN DER ZIJDEN, A. S. M. ; KOELENSMID, W. A. A. BLANCHE ; BOLDINGH, J. ; BARRETT, C. B. ; ORD, W. O. ; PHILP, J.
[s.l.] : Nature Publishing Group
Published 1962Staff ViewISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] THE toxin responsible for the so-called Turkey X disease has been described by Sargeant et al,1 as a metabolite of the mould Aspergillus flavus Link ex Fries. Elsewhere2 we have described the examination by thin-layer chromatography of toxin -containing extracts of groundnut meals and cultures of ...Type of Medium: Electronic ResourceURL: -
7Articles: DFG German National LicensesStaff View
ISSN: 0009-2614Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: Chemistry and PharmacologyPhysicsType of Medium: Electronic ResourceURL: -
8Articles: DFG German National LicensesStaff View
ISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] IN a recent communication, Mr. E. T. Jones1 has reported some observations on the genetics of a hybrid (presumably triploid) between the tetraploid Avena barbata and the diploid A. brevis. He argues that, since in his barbata-brevis progenies the ‘fatuoid’ complex breaks up, and ...Type of Medium: Electronic ResourceURL: -
9Articles: DFG German National LicensesStaff View
ISSN: 1420-9071Keywords: Groundwater microorganisms ; nuclear waste ; oligotrophySource: Springer Online Journal Archives 1860-2000Topics: BiologyMedicineNotes: Summary Excavated repositories for radioactive waste in deep and shallow geological formations will be subject to microbial contamination; therefore, a number of groundwater environments have been examined in Europe for the presence and activity of microorganisms. Common soil bacterial isolates were found to predominate in the groundwaters. Their activity is curtailed by the oligotrophic conditions encountered. It still remains to be demonstrated whether waste and waste isolation materials such as cellulose and bitumen will provide an exogenous nutrient source for the microorganisms and whether microbial activity will compromise nuclear waste immobilisation. A further constraint to the microorganisms is the high pH near-field environment generated by cement/concrete barriers.Type of Medium: Electronic ResourceURL: -
10Articles: DFG German National LicensesStaff View
ISSN: 1420-9071Keywords: Sulphate-reducing bacteria ; corrosion ; nuclear wasteSource: Springer Online Journal Archives 1860-2000Topics: BiologyMedicineNotes: Summary Experiments are described which investigate corrosion of forged 0.2% carbon steel in the presence of sulphate reducing bacteria (SRB). Cultures of a thermophilic bacteriumDesulfotomaculum nigrificans were mixed with bentonite and synthetic groundwater to simulate a bacteria-contamined backfill, and placed in contact with carbon steel disc specimens in perspex cells at 50°C under anaerobic conditions. The rates of corrosion were monitored by electrochemical techniques, together with changes in near field redox potential. After 340 days the nature and extent of any corrosion was measured and the SRB content of the bentonite determined. Recovery of relatively large numbers of bacteria after about one year incubation in an alkaline (pH 9.5) medium confirmed the pH tolerance of the strain. Enhanced corrosion (three times the rate of the control) occurred in at least two of the five cells that contained SRB despite the nutritionally poor environment which existed in the bentonite gel.Type of Medium: Electronic ResourceURL: -
11Articles: DFG German National LicensesStaff View
ISSN: 1432-0878Source: Springer Online Journal Archives 1860-2000Topics: BiologyMedicineNotes: Summary The formation of milk protein droplets in lactating cells of the mammary glands of BALB/cCrgl mice was studied by electron microscopy and by autoradiographic techniques adapted to electron microscopy. The morphological evidence strongly indicates that minute percursor particles are concentrated within the Golgi apparatus to form the mature milk protein droplets present in the apices of the cells and in the alveolar lumens. The autoradiographic evidence also supports this hypothesis. Tritiated leucine, shown to be a constituent of mouse milk protein droplets in the present experiments, was injected into the tail veins of lactating mice. The Golgi regions of the cells showed the highest grain counts in autoradiographs of specimens obtained at 30 minutes after injection. Prior to that time, the highest counts were over the ergastoplasm. The results of the experiments indicate that at least one funtion of the Golgi apparatus in lactating cells is the concentration of smaller proteinaceous precursors to form the larger milk protein droplets.Type of Medium: Electronic ResourceURL: -
12Articles: DFG German National LicensesStaff View
ISSN: 1573-7357Source: Springer Online Journal Archives 1860-2000Topics: PhysicsNotes: Abstract The Curie-point anomaly in thea-axis linear thermal expansion coefficient of CuK2Cl4 · 2H2O (T c=0.88° K) has been observed using the three-terminal capacitance technique. Length changes of the 3.8-mm single-crystal sample were determined to within approximately 0.1 Å. In the critical region our data suggest a logarithmic singularity as found previously for the specific heat. However, imperfections in the sample limit the divergence of the expansion coefficient at temperatures closer than 0.01T c to the transition. From a comparison of the linear expansion coefficient with the specific heat in the critical region, the stress dependence of the Curie temperature is calculated. We find that the temperature derivative of the spin-correlation function describing nearest neighbor magnetic ions is not proportional to the temperature derivative of the spin-correlation function describing next nearest neighbors. Furthermore, the exchange parameters characterizing nearest and next nearest neighbor interactions do not have equal stress dependences. Between 1.5 and 2.5° K the thermal expansion coefficient is proportional to the inverse square of the temperature. Comparison of the expansion coefficient with the specific heat in this temperature range indicates that the temperature derivative of both spin-correlation functions is proportional toT −2. The stress dependence of the Curie temperature calculated from data in this region agrees within experimental error with the value found from different considerations using data in the critical region.Type of Medium: Electronic ResourceURL: