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Rohdichtestruktur von Jahresringen tropischer Hölzer aus zentralamazonischen Überschwemmungswäldern (1995)

Worbes, M. ; Klosa, D. ; Lewark, S.

Springer

In: European Journal of Wood and Wood Products. 1995; 53(1): 63-67. Published 1995 Jan 01. doi: 10.1007/bf02716390.

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Publication Date: 1995-01-01

Print ISSN: 0018-3768

Electronic ISSN: 1436-736X

Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

Published by Springer

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Carbonate content of sediment core CRP-1 (Table 1)

Dietrich, Hans G ; Klosa, D

PANGAEA

In: Supplement to: Dietrich, Hans G; Klosa, D (1998): Carbonate contents in CRP-1 samples - initial results. Terra Antartica, 5(3), 645-646, hdl:10013/epic.28336.d001

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Publication Date: 2023-06-27

Description: Determinations of total carbonate content yield additional information, in the context of integrated investigations, thus enabling or enhancing the interpretation and characterisation of the depositional environment, the processes of sedimentation and the diagenesis of sediments. In the case of drillcores, they help us to discern vertical gradations of facies sequences that have repeating patterns or show changes through time. This report presents initial results of carbonate investigations on a total of 32 bulk samples from the Quaternary and Miocene strata of the CRP-1 borehole, which reached a final depth of 147.69 metres below sea floor (mbsf). Fifteen out of a total of 18 lithostratigraphic units in the core were sampled (Tab. 1). Fourteen samples (24.85-43.85 mbsf) belong to the Quaternary, whereas 18 samples (44.53-146.51 mbsf) originate from the Miocene strata. The sampling intervals varied from 1-5 m for the Quaternary, and 1-15 m for the Miocene. All the samples originated from sections of core representing not more than 1 cm thickness.

Keywords: 16 km ENE Cape Roberts; Calcium carbonate; Cape Roberts Project; Core wireline system; CRP; CRP-1; CWS; DEPTH, sediment/rock; Gas volumetric; Lithology/composition/facies; off Cape Roberts, Ross Sea, Antarctica; Sampling/drilling ice; Visual description

Type: Dataset

Format: text/tab-separated-values, 64 data points

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Sample intervals and carbonate content of sediment core CRP-2/2A (Table 1)

Dietrich, Hans G ; Klosa, D ; Wittich, C

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In: Supplement to: Dietrich, Hans G; Klosa, D; Wittich, C (2000): Carbonate contents in CRP-2/2A, Victoria Land, Antarctica. Terra Antartica, 7(3), 389-391, hdl:10013/epic.28265.d001

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Publication Date: 2023-06-27

Description: Determinations of total carbonate contents on CRP-2/2A cores yield additional information and knowledge, thus enabling or enhancing the interpretation and characterization of the depositional environment, the sedimentation, and the diagesiesis of sediments. In case of drilling profiles, they help to discern vertical gradation of facies sequences with repeating patterns or with changes in time. A total of 74 bulk samples originating from the Quaternary, Miocene and Oligocene strata of the CRP-2 and CRP-2A boreholes, final depth 624.15 metres below sea floor (mbsf). 38 of a total of 41 lithostratigraphic units of the boreholes were sampled (Tab. 1). Two samples (7.11-16,97 mbsf) belong to the Quaternary, 1 sample (23.54 mbsf) belongs to the Pliocene, 12 samples (30.71-123.7 mbsf) to the Miocene, whereas 53 samples (135.24-623.81 mbsf) originate from the Oligocene strata. The sampling intervals vary from 7-9 m for the Quaternary, 5-12 m for the Miocene or 3-12 m for the Oligocene. All the samples originate from sections of the profile of not more than 1-2 cm thickness. The samples were partioned; the partions of the samples were used for investigations with regard to clay minerals (Ehrmann, 2000), heavy minerals (Polozek, 2000), and XRD analyses (Neumann & Ehrmann, 2000).

Keywords: 14.2 km at 096° true from Cape Roberts; Cape Roberts Project; Carbonates; Core wireline system; CRP; CRP-2; CRP-2A; CWS; DEPTH, sediment/rock; Element analysis (Klosa, 1994); Lithologic unit/sequence; Number; off Cape Roberts, Ross Sea, Antarctica; Sample, optional label/labor no; Sample type; Sampling/drilling from ice

Type: Dataset

Format: text/tab-separated-values, 370 data points

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(Appendix 1) Carbonate content in relation to sediment type described for sediment core CRP-3

Dietrich, Hans G ; Klosa, D ; Wittich, C

PANGAEA

In: Supplement to: Dietrich, Hans G; Klosa, D; Wittich, C (2001): Carbonate content in CRP-3 drillcore, Victoria Land Basin, Antarctica. Terra Antartica, 8(3), 299-302, hdl:10013/epic.28199.d001

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Publication Date: 2023-06-27

Description: Determinations of total carbonate contents in the CRP-3 core yield additional information and knowledge, in the context of integrated investigations, thus enabling or enhancing the interpretation and characterization of depositional environment, sedimentation, and diagenesis. In the case of drilling profiles, they help to discern vertical gradation of facies sequences with repeating patterns or with changes in time. A total of 98 bulk samples originating from the Palaeogene strata (Early Oligocene and ?Late Eocene) in the CRP-3 borehole were studied, the depth interval being 0-823.11 metres below sea floor (mbsf). Ages for the Cenozoic strata (Fig. 1) are taken from the Cape Roberts Science Team (2000a, 2000b), Bücker et al. (this volume), and Sagnotti et al. (2000, this vol.) and are shown in the columns A and B of figure 1. No investigations were performed on the underlying ?Devonian strata from 823.11-939.42 mbsf (final depth). Twenty-eight of a total of 34 lithostratigraphic Cenozoic units of the borehole were sampled (Appendix 1). Fourty-seven samples (8.97-349.78 mbsf) are from the Early Oligocene section, whereas 51 samples (357.80-788.94 mbsf) originate from the Early Oligocene or ?Late Eocene strata. The sampling intervals are on average about 5-9 m for the Early Oligocene section and about 6-11 in in the Early Oligocene/?Late Eocene strata. All the samples were taken from sections of the profile of not more than 1-2 cm thickness. The samples were split; the portions of the samples were used for investigations with regard to clay minerals (Ehrmann, this volume), heavy minerals (Ehrmann, this volume), and mineralogy as revealed by XRD analyses (Neumann & Ehrmann, this volume).

Keywords: Cape Roberts Project; Carbonates; Core wireline system; CRP; CRP-3; CWS; DEPTH, sediment/rock; Lithologic unit/sequence; Ross Sea; Sampling/drilling from ice; Sediment type; see comment

Type: Dataset

Format: text/tab-separated-values, 397 data points

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Electronic Resource

Determination of the 3-D morphology of degradable biopolymer implants undergoing in vivo resorption (1993)

Schliephake, H. ; Klosa, D. ; Rahlff, M.

Hoboken, NJ : Wiley-Blackwell

Journal of Biomedical Materials Research 27 (1993), S. 991-998

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ISSN: 0021-9304

Keywords: Chemistry ; Polymer and Materials Science

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Medicine , Technology

Notes: A technique is presented that allows the visualization of the degradation process of biopolymers. Serial thick-section specimens containing cross-sections of polydioxanone implants (PDAs) were realigned for 3-D reconstruction using a double-embedding technique. The outlines of the cross-sectioned implants were traced using an automatic image analysis system and converted into x, y, and z coordinates. The reconstruction of the implant body was achieved by the stepwise analysis of vertical relationships between two adjacent section levels. The surface was approximated by triangulation and calculated from the surface triangles. Visualization was achieved by introducing the data into commercially available software using z-buffering and Gouraud shading. The geometric precision of the reembedding technique was found to be 0.8-1.5% of the screen width; recovering experiments showed a good approximation to the actual physical volume of unresorbed implants (±2.6%). The error of volume determination due to the limited resolution in the z direction was calculated to be acceptable (〈5.0%) in isotropic objects where the ratio between the radius of the surface curvature and the distance between the sections is 〉4. Results indicate that large devices of PDAs are degraded in vivo in a fashion similar to that previously described for in vitro degradation of PLA molded screws by a surface/center differentiation with formation of hollow residuals after 17 weeks and complete degradation with phagocytosis of microparticles after 26 weeks. © 1993 John Wiley & Sons, Inc.

Additional Material: 9 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/jbm.820270804

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