51 research outputs found
Rubus idaeopsis Focke 1911
No full text8. Rubus idaeopsis Focke (1911b: 203) Type (lectotype designated here):— CHINA. Im östlichen Himalaya; in Yünnan, und zwar in Wäldern bei Mongtse in 1500-1600 m. Höhe, A. Henry 10922 (barcode K000737858!, isolectotypes: K000737857!, NY00429685!, US00097923!, US 00996965!). [Image available at http://specimens.kew.org/herbarium/K000737858]. Note:— Focke (1911b) provided the following locality information: “Im östlichen Himalaya; in Yünnan, und zwar in Wäldern bei Mong-tse in 1500-1600 m. Höhe (A. Henry 10922)”, but did not say in which herbarium the type is allocated. Since then, no author has designated a lectotype, even inadvertently (Art. 7.11 of ICN). According to Stafleu and Cowan (1979), Focke’ type materials were deposited in A, B, BORD, BR, BREM, HAN, K, LE, W and duplicate specimens in M, MO and NY. We located 5 duplicate specimens, two of them deposited in K (barcode 000737857 & 000737858), one in NY (barcode 00429685), and two in US (barcode 00097923 & 00996965). All these collections should be regarded as syntypes (Art. 9.6 of ICN). We designate here the specimen “ A. Henry 10922” kept in K (barcode 000737858) as the lectotype (Art. 9.12 of ICN) because it has the presence of stem, leaves, flower, and inflorescence that fullycorrespond with the protologue.Published as part of Idrees, Muhammad & Zhang, Zhiyong, 2022, Lectotypification of 16 names in Rubus subg. Idaeobatus, 12 names in R. subg. Malachobatus, and 1 name in R. subg. Chamaebatus (Rosaceae), pp. 13-24 in Phytotaxa 559 (1) on page 15, DOI: 10.11646/phytotaxa.559.1.2, http://zenodo.org/record/700928
Rubus trianthus Focke 1911
No full text17. Rubus trianthus Focke (1911b: 140) Type (lectotype designated here):— CENTRAL CHINA. Prov. Hupeh [Hubei], June 1900, A. Henry 6045 (barcode K000737777!, isolectotypes:A00040748!, E00010654!, US00095494!). [Image available at http://specimens. kew.org/herbarium/K000737777]. Note:— Focke (1911b) cited two gathering “ A. Henry 6045 ” and “ Wilson s.n.” in the protologue when he described Rubus trianthus, but did not indicate the holotype specimen. In addition, no author has designated a lectotype, even inadvertently (Art. 7.11 of ICN). Focke’ original type materials were deposited in A, B, BORD, BR, BREM, HAN, K, LE, W and duplicate specimens in M, MO and NY (Stafleu & Cowan 1979). We located four duplicate specimens, four specimen of “ A. Henry 6045 ” deposited in A (barcode 00040748), E (barcode 00010654), K (barcode 000737777), and US (barcode 00095494). However, we did not locate the specimen “ Wilson s.n. ” in any available herbarium. All these collections should be regarded as syntypes (ICN, Art. 9.6). Hence, we designate here the original materials of “ A. Henry 6045 ” kept in K (barcode 000737777) as lectotype (Art. 9.12 of ICN). The selected sheet is complete and well preserved specimens that fully correspond with the protologue.Published as part of Idrees, Muhammad & Zhang, Zhiyong, 2022, Lectotypification of 16 names in Rubus subg. Idaeobatus, 12 names in R. subg. Malachobatus, and 1 name in R. subg. Chamaebatus (Rosaceae), pp. 13-24 in Phytotaxa 559 (1) on page 18, DOI: 10.11646/phytotaxa.559.1.2, http://zenodo.org/record/700928
Systematic Assessment of Multispectral Voxel-Based Morphometry in Previously MRI-Negative Focal Epilepsy
No full textT2 mapping outperforms normalised FLAIR in identifying hippocampal sclerosis
No full textRationale Qualitatively, FLAIR MR imaging is sensitive to the detection of hippocampal sclerosis (HS). Quantitative analysis of T2 maps provides a useful objective measure and increased sensitivity over visual inspection of T2-weighted scans. We aimed to determine whether quantification of normalised FLAIR is as sensitive as T2 mapping in detection of HS. Method Dual echo T2 and FLAIR MR images were retrospectively analysed in 27 patients with histologically confirmed HS and increased T2 signal in ipsilateral hippocampus and 14 healthy controls. Regions of interest were manually segmented in all hippocampi aiming to avoid inclusion of CSF. Hippocampal T2 values and measures of normalised FLAIR Signal Intensity (nFSI) were compared in healthy and sclerotic hippocampi. Results HS was identified on T2 values with 100% sensitivity and 100% specificity. HS was identified on nFSI measures with 60% sensitivity and 93% specificity. Conclusion T2 mapping is superior to nFSI for identification of HS
Personalized connectome fingerprints: Their importance in cognition from childhood to adult years
No full text
Reeling of tight fit pipe
No full textIf it would be possible to install Tight Fit Pipe by means of reeling, it would be an attractive new option for the exploitation of offshore oil and gas fields containing corrosive hydrocarbons. Tight Fit Pipe is a mechanically bonded double walled pipe where a corrosion resistant alloy liner pipe is mechanically fitted inside a carbon steel outer pipe through a thermo-hydraulic manufacturing process. Reeling is a fast method of offshore pipeline installation where a pipe is spooled on a reel, which is positioned on a vessel. The vessel subsequently sails to the offshore location where the pipe is unwound, straightened and deployed to the seabed. However, reeling of Tight Fit Pipe is not yet proven technology. The reeling process imposes high plastic strains (due to bending) in the pipe, which may cause unacceptable liner pipe wrinkling and Tight Fit Pipe ovalisation. This PhD project aimed to make a contribution to the possible development of the installation of Tight Fit Pipe by means of the reeling method. The focus of this research was on the initiation and the degree of liner pipe wrinkling as well as the degree of ovalisation occurring during the spooling-on phase of the reeling process, both theoretically and experimentally; the latter by performing full scale bending tests on 12.75 inch outer diameter Tight Fit Pipe. One of the test results indicates that a higher mechanical bending strength decreases liner pipe wrinkling and makes the Tight Fit Pipe more suitable for reeling. However, test results also show that the mechanical bonding strength for the Tight Fit Pipe tested was significantly reduced, irrespective of whether a high or a low initial mechanical bonding strength had been used prior to spooling-on. These findings justify further research into this phenomenon as the eventual mechanical bonding strength after reeling installation may be vital for its anticipated application during operation.Civil Engineering and Geoscience
Produktie van R-styreenepoxide met behulp van een Mn(III)-Salen complex
No full textDocument uit de collectie Chemische ProcestechnologieDelftChemTechApplied Science
Cortical neuronal loss and hippocampal sclerosis are not detected by voxel-based morphometry in individual epilepsy surgery patients
No full textVoxel-based morphometry (VBM) has detected differences between brains of groups of patients
with epilepsy and controls, but the sensitivity for detecting subtle pathological changes in single subjects
has not been established. The aim of the study was to test the sensitivity of VBM using statistical parametric
mapping (SPM5) to detect hippocampal sclerosis (HS) and cortical neuronal loss in individual patients.
T1-weighted volumetric 1.5 T MR images from 13 patients with HS and laminar cortical neuronal loss
were segmented, normalised and smoothed using SPM5. Both modulated and non-modulated analyses
were performed. Comparisons of one control subject against the rest (n ¼ 23) were first performed to ascertain
the smoothing level with the lowest number of SPM changes in controls. Each patient was then compared
against the whole control group. The lowest number of SPM changes in control subjects was found
at a smoothing level of 10 mm full width half maximum for modulated and non-modulated data. In the
patient group, no SPM abnormalities were found in the affected temporal lobe or hippocampus at this
smoothing level. At lower smoothing levels there were numerous SPM findings in controls and patients.
VBM did not detect any abnormalities associated with either laminar cortical neuronal loss or HS. This
may be due to normalisation and smoothing of images and low statistical power in areas with larger interindividual
differences. This suggests that the methodology may currently not be suitable to detect particular
occult abnormalities possibly associated with seizure onset zone in individual epilepsy patients with
unremarkable standard structural MRI
Multi-site voxel-based morphometry - Not quite there yet
No full textVoxel-based morphometry (VBM) is a widely applied method in computational neurosciences but it is currently recommended to compare only data collected at a single MRI scanner. Multi-site VBM would be a desirable approach to increase group size and, thus, statistical power. We aimed to assess if multi-site VBM is feasible on similar hardware and compare the magnitude of inter- and intra-scanner differences. 18 healthy subjects were scanned in two identical 3 T MRI scanners using different head coil designs, twice in scanner A and once in scanner B. 3D T1-weighted images were processed with SPM8 and FSL4.1 and compared as paired t-test (scan versus re-scan) on a voxel basis by means of a general linear model (GLM). Additionally, coefficient-of-difference (coeffD) maps were calculated for respective pairs of gray matter segmentations. We found considerable inter-scanner differences clearly exceeding a commonly used GLM significance threshold of p<0.05 (FWE corrected). The spatial pattern of detected differences was dependent on whether SPM8 or FSL4.1 was used. The inclusion of global correcting factors either aggravated (SPM8) or reduced the GLM detected differences ( FSL4.1). The coeffD analysis revealed markedly higher variability within the FSL4.1 stream both for the inter- and the intra-scanner comparison. A lowered bias cutoff (30 mm FWHM) in SPM8 improved the comparability for cortical areas. lima-scanner scan/re-scan differences were generally weaker and did not exceed a p<0.05 (FWE corrected) threshold in the GEM analysis. At 3 T profound inter-scanner differences are to be expected that could severely confound an unbalanced VBM analysis. These are like related to the receive bias of the radio-frequency hardware. (C) 2011 Elsevier Inc. All rights reserved.University Medical Center Gottingen("Ruckkehrer-Startforderung"
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