• Title/Summary/Keyword: humboldt

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Exoskeleton System for Radiation Protection in Interventional Radiology

  • Clarissa Hosse;Johannes Kolck;Elif Can;Uli Fehrenbach;Timo A. Auer;Fabio Pivetta;Federico Collettini;Bernhard Gebauer;Maximilian de Bucourt
    • Journal of Radiation Protection and Research
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    • v.49 no.2
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    • pp.78-84
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    • 2024
  • Background: As the quantity and complexity of radiological interventions are constantly increasing, gear that offers optimal protection while maintaining mobility and a low weight burden is becoming more important. A newly developed exoskeleton radiation protection system (ERPS) (StemRad MD; StemRad Ltd.) can carry the weight of the shielding. The aim of our study was to analyze initial experience, especially in terms of advantages and disadvantages, with this new ERPS in interventional radiology. Materials and Methods: Forty-six interventions utilizing the ERPS were analyzed. The interventional radiologists completed a 15-question survey evaluating various aspects of the protective system, including weight, mobility, comfort, and radiation protection adequacy. Results and Discussion: In 98% of procedures, interventionalists reported being very satisfied (89%) or slightly satisfied (9%) and would recommend the system to colleagues. The exoskeleton system was rated as 100% comfortable, not too heavy, and did not restrict mobility in 98% of cases. Conclusion: The ERPS is a recommendable alternative to standard lead aprons, providing flexibility, comfort, and effective weight distribution without restricting mobility.

Bacterial Traits Involved in Colonization of Arabidopsis thaliana Roots by Bacillus amyloliquefaciens FZB42

  • Dietel, Kristin;Beator, Barbara;Budiharjo, Anto;Fan, Ben;Borriss, Rainer
    • The Plant Pathology Journal
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    • v.29 no.1
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    • pp.59-66
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    • 2013
  • Colonization studies previously performed with a green-fluorescent-protein, GFP, labeled derivative of Bacillus amyloliquefaciens FZB42 revealed that the bacterium behaved different in colonizing surfaces of plant roots of different species (Fan et al., 2012). In order to extend these studies and to elucidate which genes are crucial for root colonization, we applied targeted mutant strains to Arabidopsis seedlings. The fates of root colonization in mutant strains impaired in synthesis of alternative sigma factors, non-ribosomal synthesis of lipopeptides and polyketides, biofilm formation, swarming motility, and plant growth promoting activity were analyzed by confocal laser scanning microscopy. Whilst the wild-type strain heavily colonized surfaces of root tips and lateral roots, the mutant strains were impaired in their ability to colonize root tips and most of them were unable to colonize lateral roots. Ability to colonize plant roots is not only dependent on the ability to form biofilms or swarming motility. Six mutants, deficient in abrB-, sigH-, sigD-, nrfA-, yusV and RBAM017410, but not affected in biofilm formation, displayed significantly reduced root colonization. The nrfA- and yusV-mutant strains colonized border cells and, partly, root surfaces but did not colonize root tips or lateral roots.

Bronchitis Accompanying Caseous Airsacculitis and an Accidental Finding of Melanotic Pigmentation of Testis of Humboldt Penguin(Stheniscus humboldti) (Humboldt 종(種) Penguin(Stheniscus humboldti)의 건낙성기낭염(乾酪性氣囊炎)을 동반(同伴)한 기관지염(氣管枝炎)과 고환(睾丸)의 Melanin 색소(色素) 심착증(沈着症))

  • Lee, Joon Sup;Lim, Chang Hyeong;Oh, Soon Sup;Oh, Chang Young
    • Korean Journal of Veterinary Research
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    • v.15 no.2
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    • pp.259-262
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    • 1975
  • Four Humboldt penguins were imported from overseas in March, 1975. Soon after arrival at the Zoological Garden of Chang Gyeong Won in Seoul, two penguins became ill with symptoms of severe dysnnoea, vomiting, diarrhea and mild convulsion. They died on the second day of illness. The main pathological finding was bronchitis which accompanied a caseous airsacculitis on the left lung. A massive melanin pigmentation in the intertubular tissue of the testis was found accidentally.

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Structural characteristics of Humboldt Range, northwest Nevada, U. S. A. (미국 북서 네바다주 험볼트 산맥의 구조분석)

  • 정상원
    • The Journal of the Petrological Society of Korea
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    • v.8 no.3
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    • pp.131-148
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    • 1999
  • Characteristics and complex structures in the northwest Nevada, U.S.A. are de-veloped due to relative tectonic movement of major tectonostratigraphic terranes. Theresearch area is composed of autochthonous rocks of both Early Triassic Koipato Group and Middle Triassic Star Peak Group, which is located in the Humboldt Range, northwest Nevada, U.S.A. The present research is focused on deformation history, related fabric development, and state of regional paleostress during the Jurassic to Late Cretaceous. The Triassic autochthonous rocks in the Humboldt Range, Nevada, U.S.A. display polyphase deformation due to E- to ESE-directed tectonic transport of the Fencemaker allochthon over autochthonous rocks of the Humboldt Range. Structures involving the Mesozoic foreland deformation are development of intense foliation, different styles of folds, minor thrusts, transposed layering, and strong mylonitization. These tectonic structures are mostly developed along the western flank of the Humboldt Range, and are reported as the first deformation of the Mesozoic foreland in the Humboldt Range, Nevada, U.S.A. Regional principal stress(${\sigma}_1$) is interpreted to be E to ESE between the Jurassic and Early Cretaceous on the basis of orientations of strongly developed $D_1$ structures. The deformation during the Middle to Late Cretaceous, is characterized by development of consistent N- to NNE-trending metamorphic quartz veins, and shear zones parallel to pre-existing $D_1$ foliation. Orientations of metamorphic quartz veins as well as other kinematic indicators are N to NNE and are interpreted as those of regional principal stress(${\sigma}_1$) during the Late Cretaceous. The sense of shear applied in the Humbololt Range is dextral and is caused by reactivation of early-formed $D_1$ structures. These results reflect counterclockwise rotation of regional principal paleostress in the Humboldt Range from the Jurassic to Late cretaceous. Finally, development of both shear band cleavage and S/C mylonitic fabrics indicates that the shear zones in the Humboldt Range reflect involvement of enhanced non-coaxial flow during bulk shortening in mylonitic formation.

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Analysis and quantification of DNA photoadducts by HPLC/ion trap mass spectrometry

  • Zhang, Guangyu;Linscheid, Michael
    • Proceedings of the SCSK Conference
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    • 2003.09b
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    • pp.405-406
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    • 2003
  • DNA is known as the genetic material in cells. Various environmental factors can cause DNA damages. One of them is sunlight. The life on earth depends on the sunlight, but on the other hand, the UV light in sunlight can cause skin DNA damages. When these damages are not fully repaired before replication, they can lead to mutations of oncogenes and tumour suppressor gene and result in photo carcinogenesis, in the end, skin cancer.(omitted)

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Vergleich des Zeichens von C. S. Peirce mit dem von W. v. Humboldt (퍼스와 훔볼트의 기호관 비교)

  • An Cheung-O
    • Koreanishche Zeitschrift fur Deutsche Sprachwissenschaft
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    • v.3
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    • pp.35-55
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    • 2001
  • In der Semiotik ist es sehr wichtig, den Rahmenbereich des Zeichens festzustellen, weil der Bereich des Zeichens je nach Wissenschaftler unterschiedlich ist. Dementsprechend muss jedes Forschungsergebnis in der Semiotik hinterfragt werden, um sichergehen zu $k\"{o}nnen$, ob es zur Semiotik $geh\"{o}rt$ oder nicht. Daher besteht $zun\"{a}chst$ die Notwendigkeit, zu bestimmen, was ein Zeichen ist. In diesem Zusammenhang versuchten wir in diesem Aufsatz, damit wir den Begriff 'Zeichen' besser erfassen $k\"{o}nnen$. das Zeichen von C. S. Peirce mit dem van W. v. Humboldt zu vergleichen. Zu Beginn dieses Aufsatzes stellten wir dar, was ein Zeichen ist. Dieser Vorgang ist notwendig, damit mit Hilfe des allgemeinen Begriffes des Zeichens ein Vergleich zwischen Peirce und Humboldt angestellt werden kann. Danach stellten wir die Zeichentheorie von Peirce vor. Nach Peirce ist die Sprache eine Untergattung von drei Zeichensorten, die Ikon, Index und Symbol genannt werden. Nach ihm gehbrt das Symbol zur Sprache. $F\"{u}r$ ihn ist der Interpretant im Zeichenbegriff am wichtigsten, weil ein Zeichen immer eines Interpretantes bedarf, der das Zeichen interpretiert. Aber der Interpretant ist kein Individuum, sondern ein interpretierendes $Bewu{\ss}tsein$, also eine traditionelle Gesellschaft, die ein Muster zum Interpretieren bietet. $Anschlie{\ss}end\;besch\"{a}ftigten$ wir uns mit der Theorie von Humboldt. Er benutzt verschiedene Zeichenbegriffe wie z.B. Schriftzeichen, Lautzeichen, Sprachzeichen, grammatische Zeichen, $h\"{o}rbare$ Zeichen, zeitliche Zeichen und $r\"{a}umliche$ Zeichen. Bei ihm ist die Unterscheidung zwischen Wort und Zeichen besonders wichtig, weil das Wort nicht zum Zeichen $geh\"{o}rt$, wie wir es normalerweise annehmen. Er behauptet, dass das Wort beim Produzieren motiviert ist. Daher ist nach ihm das Wort transsemiotisch. $Dar\"{u}ber$ hinaus muss das Zeichen und das Wort im Zusammenhang zwischen Sprache und Denken betrachtet werden. Wenn man das Wort als Zeichen betrachtet, ist das Wort ein Zwischending zwischen dem Sprechenden und dem Ding. Damit $k\"{o}nnen$ wir schlussfolgern; 1) Bei Humboldt ist das Zeichen em Mittel zum Denken, das sich vom transsemiotischen Wort unterscheidet. 2) Nach Peirce besteht ein Zeichen aus Ikon, Index und Symbol. Im Zeichen, das aus Reprasentamen, Interpretant und Objekt besteht, ist der Interpretant am wichtigsten, denn ein Zeichen, dass keinen Interpretant hat, ist kein Zeichen mehr, das interpretierbar ist.

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Impact of piezocision on orthodontic tooth movement

  • Papadopoulos, Nikolaos;Beindorff, Nicola;Hoffmann, Stefan;Jost-Brinkmann, Paul-Georg;Prager, Thomas Michael
    • The korean journal of orthodontics
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    • v.51 no.6
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    • pp.366-374
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    • 2021
  • Objective: This study investigated the impact of a single piezocision in the maxillary alveolar process on the speed of tooth movement. The null hypothesis was that the speed of tooth movement will be equal with and without piezocision. Methods: All maxillary molars on one side were moved against the combined incisors in 10 ten-week-old male Wistar rats. Under general anesthesia, a force of 25 cN was applied on either side using a Sentalloy closed coil spring. After placing the orthodontic appliance, vertical corticision was performed using a piezotome under local anesthesia, 2 mm mesial from the mesial root of the first molar on a randomly selected side; the other side served as the control. At the beginning of the treatment, and 2 and 4 weeks later, skull micro-computed tomography was performed. After image reconstruction, the distance between the mesial root of the first molar and the incisive canal, and the length of the mesial root of the first maxillary molar were measured. Moreover, the root resorption score was determined as described by Lu et al. Results: Significantly higher speed of tooth movement was observed on the corticision side; thus, the null hypothesis was rejected. The loss of root length and root resorption score were significantly more pronounced after piezocision than before. A strong correlation was observed between the speed of tooth movement and root resorption on the surgical side, but the control side only showed a weak correlation. Conclusions: Piezocision accelerates orthodontic tooth movement and causes increased root resorption.