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Wendt K, Kratz JV, Lantzsch J, Müller P, Nörtershäuser W, Seibert A, Trautmann N, Waldek A, Zimmer K. Rapid ultratrace determination of 89,90Sr in environmental samples by collinear laser resonance ionization spectrometry / Schneller, empfindlicher Spurennachweis von 89,90Sr in Umweltproben mit kollinearer Laser-Resonanzionisations-Spektrometrie. KERNTECHNIK 2021. [DOI: 10.1515/kern-1996-622-306] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Kaczmarek R, Zimmer K, Gajdzis P, Gajdzis M. The Role of Eph Receptors and Ephrins in Corneal Physiology and Diseases. Int J Mol Sci 2021; 22:ijms22094567. [PMID: 33925443 PMCID: PMC8123804 DOI: 10.3390/ijms22094567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Revised: 04/21/2021] [Accepted: 04/26/2021] [Indexed: 11/29/2022] Open
Abstract
The cornea, while appearing to be simple tissue, is actually an extremely complex structure. In order for it to retain its biomechanical and optical properties, perfect organization of its cells is essential. Proper regeneration is especially important after injuries and in the course of various diseases. Eph receptors and ephrin are mainly responsible for the proper organization of tissues as well as cell migration and communication. In this review, we present the current state of knowledge on the role of Eph and ephrins in corneal physiology and diseases, in particular, we focused on the functions of the epithelium and endothelium. Since the role of Eph and ephrins in the angiogenesis process has been well established, we also analyzed their influence on conditions with corneal neovascularization.
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Affiliation(s)
- Radoslaw Kaczmarek
- Department of Ophthalmology, Wroclaw Medical University, 50-556 Wroclaw, Poland; (R.K.); (K.Z.)
| | - Katarzyna Zimmer
- Department of Ophthalmology, Wroclaw Medical University, 50-556 Wroclaw, Poland; (R.K.); (K.Z.)
| | - Pawel Gajdzis
- Department of Pathomorphology and Oncological Cytology, Wroclaw Medical University, 50-556 Wroclaw, Poland;
| | - Malgorzata Gajdzis
- Department of Ophthalmology, Wroclaw Medical University, 50-556 Wroclaw, Poland; (R.K.); (K.Z.)
- Correspondence: ; Tel.: +48-71-736-43-00
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Abstract
BACKGROUND The electrophysiological activity of the heart is recorded and presented in form of electrocardiography (ECG). In 1998, the concept of P wave dispersion as the risk factor for atrial fibrillation (AF) recurrence was introduced. It was calculated as the difference between the longest and the shortest P wave. OBJECTIVES To prove that the P wave dispersion is an artifact of low accuracy in P wave measurement. MATERIAL AND METHODS The study included 104 patients (48 women, 56 men), aged 63 ±14 years, undergoing various electrophysiological procedures. The P wave was measured twice - firstly at the paper speed of 50 mm/s, enhancement ×8 (standard - imprecise), and secondly at 200 mm/s, ×64-256 (precise). RESULTS The imprecise measurement method resulted in different duration of all P wave parameters in comparison with precise measurement. The longest P wave duration (Pmax) measured imprecisely was 105.1 ±22.1, the Pmax measured precisely was 134.0 ±21.3 (p < 0.001). The P dispersion measured imprecisely was 44.1 ±16.8 and the P dispersion measured precisely was 2.8 ±3.4 (p < 0.0001). The correlation between imprecise Pmax and imprecise Pmin was r = 0.664 (p < 0.05). The correlation between imprecise Pmax and imprecise P wave dispersion was r = 0.612 (p < 0.05). The correlation between precise Pmax and Pmin was almost 1.0 (r = 0.987, p < 0.05). CONCLUSIONS The P wave dispersion does not exist. The measurements of the P wave have to be precise to assure the highest scientific and medical sincerity. The highest clinical value is related to the P wave duration.
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Affiliation(s)
| | - Katarzyna Zimmer
- Clinic and Department of Ophthalmology, Wroclaw Medical University Hospital, Poland
| | - Wojciech Przywara
- Department of Dermatology, Regional Specialist Hospital in Wrocław, Poland
| | - Dorota Zyśko
- Department of Emergency Medicine, Wroclaw Medical University, Poland
| | | | - Agnieszka Sławuta
- Department of Internal and Occupational Diseases, Hypertension and Clinical Oncology Wroclaw Medical University, Poland
| | - Jacek Gajek
- Department of Emergency Medical Service, Wroclaw Medical University, Poland
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Seeber A, Puccini A, Xiu J, Baca Y, Spizzo G, Zimmer K, Lenz H, Battaglin F, Goldberg R, Grothey A, Shields A, Salem M, Marshall J, Korn W, Wolf D, Kocher F. WRN mutated colorectal cancer (CRC) is characterized by a distinct molecular and immunological profile. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz246.122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Schimmel K, Bock K, Grote-Levi L, Xiao K, Pfanne A, Just A, Samolovac S, Zimmer K, Remke J, Geffers R, Do Q, Braesen J, Batkai S, Fiedler J, Thum T. P2308Natural compound library screen identifies potent molecules with anti-fibrotic activity through modulation of noncoding RNAs. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx502.p2308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Ammer S, Lambertz C, von Soosten D, Zimmer K, Meyer U, Dänicke S, Gauly M. Impact of diet composition and temperature-humidity index on water and dry matter intake of high-yielding dairy cows. J Anim Physiol Anim Nutr (Berl) 2017; 102:103-113. [PMID: 28295666 DOI: 10.1111/jpn.12664] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Accepted: 11/27/2016] [Indexed: 11/28/2022]
Abstract
The temperature-humidity index (THI) is widely used to characterize heat stress in dairy cattle. Diet composition is known to induce variation in metabolic-associated heat production. However, the relationships between THI and diet are poorly characterized with regard to performance and intake behaviour. Therefore, the objectives were to evaluate the impact of THI on water intake (WI), dry matter intake (DMI) and the frequency of drinking and feeding bouts in lactating dairy cows offered four dietary treatments: each contained 20% grass silage and additionally (i) 20% maize silage, 60% concentrate (M-HC); (ii) 60% maize silage, 20% concentrate (M-LC); (iii) 20% pressed beet pulp silage, 60% concentrate (BPS-HC); or (iv) 60% pressed beet pulp silage, 20% concentrate (BPS-LC) (DM basis). Individual WI and DMI were recorded from April to July 2013. Furthermore, dietary effects on milk production and reticular pH were estimated. Milk yield was lowest for M-LC, while energy-corrected milk was similar for all diets. Milk fat percentage was higher and milk protein amount lower for cows offered both LC diets. Reticular pH below 6.3, 6.0 and 5.8 lasted longest for BPS-LC. WI was higher for HC diets. However, the frequency of drinking bouts was not influenced by the ration. Lower DMI occurred for BPS-LC compared to M-LC. Frequency of feeding bouts was significantly higher for LC diets. THI was significantly related to WI, DMI as well as drinking and feeding bouts. Per increasing THI, WI increased slightly more for LC diets and DMI decreased more for HC diets. Frequency of drinking bouts increased slightly higher for BPS rations per rising THI, while the decrease in feeding bouts was highest for M-HC. In conclusion, TMR composition and moderate heat stress impacted WI and DMI of dairy cows, while both dietary energy density and ruminal filling might intensify the THI impact.
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Affiliation(s)
- S Ammer
- Department of Animal Sciences, Georg-August-University, Goettingen, Germany
| | - C Lambertz
- Faculty of Science and Technology, Free University of Bolzano, Bolzano, Italy
| | - D von Soosten
- Institute of Animal Nutrition, Friedrich-Loeffler-Institute (FLI), Federal Research Institute for Animal Health, Braunschweig, Germany
| | - K Zimmer
- Institute of Animal Nutrition, Friedrich-Loeffler-Institute (FLI), Federal Research Institute for Animal Health, Braunschweig, Germany
| | - U Meyer
- Institute of Animal Nutrition, Friedrich-Loeffler-Institute (FLI), Federal Research Institute for Animal Health, Braunschweig, Germany
| | - S Dänicke
- Institute of Animal Nutrition, Friedrich-Loeffler-Institute (FLI), Federal Research Institute for Animal Health, Braunschweig, Germany
| | - M Gauly
- Faculty of Science and Technology, Free University of Bolzano, Bolzano, Italy
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Zimmer K, Przywara W, Zyśko D, Sławuta A, Gajek J. The nature of P-wave dispersion — A clinically useful parameter that does not exist. Int J Cardiol 2016; 212:59-60. [DOI: 10.1016/j.ijcard.2016.03.031] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/22/2015] [Accepted: 03/12/2016] [Indexed: 11/26/2022]
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Gonzalez M, Byorth P, Zimmer K. Garcin Syndrome in Pituitary Adenoma. Skull Base Surg 2014. [DOI: 10.1055/s-0034-1384164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Lopez-Gonzalez M, Bland Z, Zimmer K. Surgical Management of Skull Base Breast Metastasis. Skull Base Surg 2014. [DOI: 10.1055/s-0034-1384157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Lopez-Gonzalez M, Dolan E, Goulet C, Zimmer K. Role of Surgery in Brainstem Metastasis. Skull Base Surg 2014. [DOI: 10.1055/s-0034-1384156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Reck C, Zimmer K, Dubber S, Zipser B, Schlehe B, Gawlik S. The influence of general anxiety and childbirth-specific anxiety on birth outcome. Arch Womens Ment Health 2013; 16:363-9. [PMID: 23558948 DOI: 10.1007/s00737-013-0344-0] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2012] [Accepted: 03/17/2013] [Indexed: 11/25/2022]
Abstract
In the present study, we examined a German sample to determine whether anxiety symptoms during pregnancy had an impact on the duration and method of childbirth. Data of N = 88 women recruited at the Heidelberg University Hospital were used in the analyses. Prepartum anxiety symptoms were assessed with the State-Trait Anxiety Inventory (STAI, general anxiety) and the Pregnancy Related Anxiety Questionnaire (PRAQ-R, pregnancy-specific anxiety). Obstetric outcome was taken from birth records and operationalized by two parameters: the total duration of birth (dilation and fetal expulsion) and the incidence of pregnancy or birth-related interventions (ventouse, planned, and unplanned Cesarean section). The data show that childbirth-specific anxiety assessed by the PRAQ-R is an important predictor of total birth duration. In contrast, general anxiety measured by the STAI had no effect. The incidence of birth intervention was explained by parity. Anxiety, however, had no predictive value. In addition to medical factors, childbirth-specific anxiety during pregnancy plays an important role in the process of childbirth. The findings of the present study point to the need of implementing psychological interventions to reduce childbirth-specific anxiety and thereby positively influencing birth outcome.
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Affiliation(s)
- C Reck
- General Psychiatry, Center for Psychosocial Medicine, Heidelberg University Hospital, Heidelberg, Germany,
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Wang X, Ehrhardt M, Lorenz P, Scheit C, Ragnow S, Ni XW, Zimmer K. In-process measuring of the electrical shunt resistance of laser-scribed thin-film stacks by nested circular scribes. Rev Sci Instrum 2013; 84:104704. [PMID: 24182141 DOI: 10.1063/1.4824119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Laser scribing of functional thin-film stacks attracts increasing attention especially for applications of flexible electronics or photovoltaics. Laser can perform selective removal of the thin-film stacks that is essential for the isolation and interconnection of the solar cells. The optimization of the laser scribing process concerning the functional properties of the device requires customized characterization techniques minimizing side effects. The proposed and demonstrated nested circular laser scribing technique allows the in-process measurement of the electrical characteristics, e.g., the shunt formation due to laser scribing of the thin-film stack, minimizing secondary effects originating from aging, contacting, changing of sample characteristics, or alterations of the measurement conditions. This technique enables the identification of reliable and quick information on the changes of the solar cell characteristics by laser scribing as this is demonstrated in this work.
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Affiliation(s)
- X Wang
- School of Science, Nanjing University of Science & Technology, Xiaolingwei 200, 210094 Nanjing, China
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Palm F, Henschke N, Wolf J, Zimmer K, Safer A, Schröder RJ, Inselmann G, Brenke C, Becher H, Grau AJ. Intracerebral haemorrhage in a population-based stroke registry (LuSSt): incidence, aetiology, functional outcome and mortality. J Neurol 2013; 260:2541-50. [DOI: 10.1007/s00415-013-7013-0] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2013] [Revised: 06/12/2013] [Accepted: 06/17/2013] [Indexed: 10/26/2022]
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Wolf J, Rohrer T, Liptay S, Zimmer K, Fröhlich-Reiterer E, Marg W, Stern M, Kapellen T, Hauffa B, Wölfle J, Scheuing N, Holl R. Zöliakie als Risikofaktor für mikrovaskuläre Folgeerkrankungen bei Typ-1-Diabetes: Longitudinales Follow-up von 54488 Patienten aus Deutschland/Österreich im Rahmen der DPV-Initiative. DIABETOL STOFFWECHS 2013. [DOI: 10.1055/s-0033-1341676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Höolig K, Blechschmidt M, Poppe-Thiede K, Kramer M, Zimmer K, Kroschinsky F, Bornhäuser M, Ehninger G. 26 Collection of peripheral blood stem cells in allogeneic donors via femoral venous lines - safe, successful and well-tolerated. Transfus Apher Sci 2010. [DOI: 10.1016/s1473-0502(10)70012-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Müller T, Bätza HJ, Beckert A, Bunzenthal C, Cox JH, Freuling CM, Fooks AR, Frost J, Geue L, Hoeflechner A, Marston D, Neubert A, Neubert L, Revilla-Fernández S, Vanek E, Vos A, Wodak E, Zimmer K, Mettenleiter TC. Analysis of vaccine-virus-associated rabies cases in red foxes (Vulpes vulpes) after oral rabies vaccination campaigns in Germany and Austria. Arch Virol 2009; 154:1081-91. [PMID: 19521660 DOI: 10.1007/s00705-009-0408-7] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2009] [Accepted: 05/22/2009] [Indexed: 10/20/2022]
Abstract
To eradicate rabies in foxes, almost 97 million oral rabies vaccine baits have been distributed in Germany and Austria since 1983 and 1986, respectively. Since 2007, no terrestrial cases have been reported in either country. The most widely used oral rabies vaccine viruses in these countries were SAD (Street Alabama Dufferin) strains, e.g. SAD B19 (53.2%) and SAD P5/88 (44.5%). In this paper, we describe six possible vaccine-virus-associated rabies cases in red foxes (Vulpes vulpes) detected during post-vaccination surveillance from 2001 to 2006, involving two different vaccines and different batches. Compared to prototypic vaccine strains, full-genome sequencing revealed between 1 and 5 single nucleotide alterations in the L gene in 5 of 6 SAD isolates, resulting in up to two amino acid substitutions. However, experimental infection of juvenile foxes showed that those mutations had no influence on pathogenicity. The cases described here, coming from geographically widely separated regions, do not represent a spatial cluster. More importantly, enhanced surveillance showed that the vaccine viruses involved did not become established in the red fox population. It seems that the number of reported vaccine virus-associated rabies cases is determined predominantly by the intensity of surveillance after the oral rabies vaccination campaign and not by the selection of strains.
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Affiliation(s)
- Thomas Müller
- Friedrich-Loeffler-Institut, WHO Collaborating Centre for Rabies Surveillance and Research, Wusterhausen, Germany.
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Böhme R, Vass C, Hopp B, Zimmer K. Sub-wavelength ripples in fused silica after irradiation of the solid/liquid interface with ultrashort laser pulses. Nanotechnology 2008; 19:495301. [PMID: 21730665 DOI: 10.1088/0957-4484/19/49/495301] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Laser-induced backside wet etching (LIBWE) is performed using ultrashort 248 nm laser pulses with a pulse duration of 600 fs to obtain sub-wavelength laser-induced periodic surface structures (LIPSS) on the back surface of fused silica which is in contact with a 0.5 mol l(-1) solution of pyrene in toluene. The LIPSS are strictly one-dimensional patterns, oriented parallel to the polarization of the laser radiation, and have a constant period of about 140 nm at all applied laser fluences (0.33-0.84 J cm(-2)) and pulse numbers (50-1000 pulses). The LIPSS amplitude varies due to the inhomogeneous fluence in the laser spot. The LIPSS are examined with scanning electron microscopy (SEM) and atomic force microscopy (AFM). Their power spectral density (PSD) distribution is analysed at a measured area of 10 µm × 10 µm. The good agreement of the measured and calculated LIPSS periods strongly supports a mechanism based on the interference of surface-scattered and incident waves.
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Affiliation(s)
- R Böhme
- Leibniz-Institut für Oberflächenmodifizierung, Permoserstraße 15, 04318 Leipzig, Germany
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Kaufmann C, Brechbühl M, Oevermann A, Müller S, Zimmer K, Schönmann M, Leroux C, Weibel D, Bertoni G. [Enzootic nasal adenocarcinoma in a dairy sheep flock]. SCHWEIZ ARCH TIERH 2008; 150:297-302. [PMID: 18605021 DOI: 10.1024/0036-7281.150.6.297] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
In a herd of dairy sheep several losses occurred due to a respiratory syndrome in combination with progressive wasting. Clinical and pathomorphological diagnostics of 3 sheep revealed the presence of cancerous masses in the nasal cavities. These neoplasms were identified as adenocarcinomas originating from the nasal mucosa. Etiologically, they were attributed to JRSV (Jaagsiekte Sheep Retrovirus) by detection of capsid protein 24 in western blot. The significance of the disease in Switzerland is discussed, also in the context of lung adenomatosis.
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Affiliation(s)
- C Kaufmann
- Wiederkäuerklinik, Abteilung klinische Forschung der Universität Bern, Bern.
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Geidel C, Schüler D, Weber K, Stegemann J, Lindemann H, Zimmer K. Überprüfung des neuen Membran- Verneblers I-neb CF® zur optimierten inhalativen Tobramycin-Therapie. Pneumologie 2008. [DOI: 10.1055/s-2008-1074295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Scheffer M, van Geest GJ, Zimmer K, Jeppesen E, Søndergaard M, Butler MG, Hanson MA, Declerck S, De Meester L. Small habitat size and isolation can promote species richness: second-order effects on biodiversity in shallow lakes and ponds. OIKOS 2006. [DOI: 10.1111/j.0030-1299.2006.14145.x] [Citation(s) in RCA: 255] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Habler O, Schwenzer K, Zimmer K, Prager M, König U, Oppenrieder K, Pape A, Steinkraus E, Reither A, Buchrot A, Zwissler B. Effects of standardized acute normovolemic hemodilution on intraoperative allogeneic blood transfusion in patients undergoing major maxillofacial surgery. Int J Oral Maxillofac Surg 2004; 33:467-75. [PMID: 15183411 DOI: 10.1016/j.ijom.2003.10.007] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/17/2003] [Indexed: 11/24/2022]
Abstract
The aim of the present study was to demonstrate the practicality and efficacy of acute normovolemic hemodilution (ANH) to reduce allogeneic red blood cell (RBC) transfusion in patients undergoing elective surgery with anticipated high intraoperative blood loss (BL). 124 patients (age 48 +/- 18 years, ASA classes I-III) underwent major maxillofacial surgery in a university hospital (68% tumor surgery, 32% dysgnathia correction). After induction of general anesthesia, ANH was performed by standardized withdrawal of 900 ml (2 units) of whole blood and simultaneous infusion of 500 ml of hydroxyethyl starch solution (6% HES 130,000/0.4) and 1500 ml of crystalloidal solution. Intraoperative BL was fluid-compensated until physiologic parameters indicated the need for RBC transfusion. First, autologous ANH-blood was retransfused followed by, if necessary, allogeneic RBC. Total BL was referred to the patient's calculated blood volume (BV): fractional blood volume loss, BL(fract) = BL/BV. ANH took 16 +/- 2 min and was void of any adverse event. The costs for ANH was 24 per patient. 55 patients had a mean BL(fract) of 44 +/- 28% and required an intraoperative transfusion; 49/55 patients with an average BL(fract) of 37 +/- 14% were transfused with only autologous ANH-blood; 6/55 patients with a mean BL(fract) of 100 +/- 47% underwent additional transfusion with allogeneic RBC. Standardized, 2 unit, ANH is a practicable, safe and economic blood conservation technique that allowed for the complete avoidance of allogeneic RBC transfusion in 89% of patients undergoing maxillofacial surgery that required an intraoperative RBC transfusion.
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Affiliation(s)
- O Habler
- Clinic of Anesthesiology, Johann Wolfgang Goethe University Frankfurt, Frankfurt, Germany.
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Klawonn W, Cussler K, Dräger KG, Gyra H, Köhler H, Zimmer K, Hess RG. [The importance of allergic skin test with Johnin, antibody ELISA, cultural fecal test as well as vaccination for the sanitation of three chronically paratuberculosis-infected dairy herds in Rhineland-Palatinate]. Dtsch Tierarztl Wochenschr 2002; 109:510-6. [PMID: 12596564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
Abstract
Three chronically paratuberculosis infected herds were tested for six years twice a year (intradermal Johnin test, antibody ELISA (IDEXX Corp.), microbial culture) according to a sanitary program. Culling of shedding animals and vaccination of calves with NEOPARASEC (Merial Corp.) were part of the program. In course of experiment, 1015 samples of 228 non vaccinated cows and 1502 samples of 293 vaccinated cattle have been tested. 3.8% of the vaccinated animals proved positive in microbial culture. Nearly all vaccinated calves developed granulomas sized from hazelnut to loaf at the injection site. Positive reactions in intradermal test as well as in antibody ELISA were found in very young calves. 24.3%, 33.7%, 25.9%, respectively of the non vaccinated animals were identified as shedders of M. avium subsp. paratuberculosis (MAP) by microbial culture. In the first and in the second herd most shedders of MAP were found in the first herd examination (66.7%, 42.9%, respectively), whereas in the third herd they were detected in the fifth examination (31.0%). At the beginning, 17.9% of non vaccinated animals proved positive in intradermal test, 14.4% in antibody ELISA. Afterwards, the number of positive test results decreased but increased again towards the end of the experiment. 48.5% of the 66 shedders showed positive reactions in intradermal test, 57.6% in antibody ELISA, 77.3% in at least one of these both tests. Antibodies in ELISA were found in rising frequency from two years before the time of shedding. 50.0% of the shedders reacted positive in ELISA at the time of shedding. In selected shedders first positive results were found at the age of about two years. Unfortunately, only incomplete hygienic measures were realized by the farmers. Under field conditions the realisation of attending sanitary programs is difficult. MAP is spread mainly by buying of animals, therefore a certification program for paratuberculosis free herds is urgently necessary as well as an improvement of diagnostic methods.
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Affiliation(s)
- W Klawonn
- Landesuntersuchungsamt Rheinland-Pfalz, Fachbereich Tiermedizin, Koblenz.
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Gitti R, Wild C, Tsiao C, Zimmer K, Glass TE, Dorn HC. Solid/liquid intermolecular transfer of dynamic nuclear polarization. Enhanced flowing fluid proton NMR signals via immobilized spin labels. J Am Chem Soc 2002. [DOI: 10.1021/ja00215a047] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Köhler H, Gyra H, Zimmer K, Dräger KG, Burkert B, Lemser B, Hausleithner D, Cubler K, Klawonn W, Hess RG. Immune reactions in cattle after immunization with a Mycobacterium paratuberculosis vaccine and implications for the diagnosis of M. paratuberculosis and M. bovis infections. J Vet Med B Infect Dis Vet Public Health 2001; 48:185-95. [PMID: 11393814 DOI: 10.1046/j.1439-0450.2001.00443.x] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
After immunization of four calves with a live modified Mycobacterium paratuberculosis vaccine the course of the humoral and cell mediated immune reactions was studied during a 2-year clinical investigation. Furthermore, the possibility of shedding of the vaccine strain and the influence of the vaccination on the tuberculin skin test was determined. In addition to standard procedures recently developed diagnostic methods (antibody enzyme-linked immunosorbent assay, interferon-gamma test, polymerase chain reaction) were used. A cell-mediated immune reaction, reflected in an increased, specifically induced, interferon-gamma production developed much earlier (1-2 weeks post-immunization) than humoral immunity (8-16 weeks post-gamma immunization). While the increase in antibody titres was transient, declining to extremely low levels 48-60 weeks post-immunization, cell-mediated immunity remained detectable until the end of the investigation. Spread of the vaccine strain into the body and shedding were never detected during the whole course of the study except for one colon site in one calf. As late as 2 years after vaccine application positive or doubtful skin reactions against M. bovis purified protein derivative were measured, reflecting possible interference of the immunization with the diagnosis of bovine tuberculosis. At the end of the investigation, a positive cell-mediated immune reaction was detected the control animal although clinical, pathological and bacteriological examinations gave no indication for a mycobacterial infection.
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Affiliation(s)
- H Köhler
- Bundesinstitut für gesundheitlichen Verbraucherschutz und Veterinärmedizin, Fachbereich 4, Jena, Germany
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Abstract
In environmental noise surveys, self-reported noise sensitivity, a stable personality trait covering attitudes toward a wide range of environmental sounds, is a major predictor of individual noise-annoyance reactions. Its relationship to basic measures of auditory functioning, however, has not been systematically explored. Therefore, in the present investigation, a sample of 61 unselected listeners was subjected to a battery of psychoacoustic procedures ranging from threshold determinations to loudness scaling tasks. No significant differences in absolute thresholds, intensity discrimination, simple auditory reaction time, or power-function exponents for loudness emerged, when the sample was split along the median into two groups of "low" vs "high" noise sensitivity on the basis of scores obtained from a psychometrically evaluated questionnaire [Zimmer and Ellermeier, Diagnostica 44, 11-20 (1998)]. Small, but systematic differences were found in verbal loudness estimates, and in ratings of the unpleasantness of natural sounds, thus suggesting that self-reported noise sensitivity captures evaluative rather than sensory aspects of auditory processing.
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Affiliation(s)
- W Ellermeier
- Institut für Psychologie, Universität Regensburg, Germany.
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Vaghadia H, Chan V, Ganapathy S, Lui A, McKenna J, Zimmer K. A multicentre trial of ropivacaine 7.5 mg x ml(-1) vs bupivacaine 5 mg x ml(-1) for supra clavicular brachial plexus anesthesia. Can J Anaesth 1999; 46:946-51. [PMID: 10522581 DOI: 10.1007/bf03013129] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
Abstract
PURPOSE To compare the efficacy of ropivacaine 7.5 mg x ml(-1) with bupivacaine 5.0 mg x ml(-1) for subclavian perivascular brachial plexus block. METHODS After informed consent, 104 ASA I-III adults participated in a randomized, double-blind, multi-center trial to receive 30 ml of either ropivacaine 7.5 mg x ml(-1) or bupivacaine 5.0 mg x ml(-1) for subclavian perivascular brachial plexus block prior to upper limb surgery. Onset and duration of sensory and motor block in the distribution of the axillary, median, musculo-cutaneous, radial and ulnar nerves were assessed. RESULTS Onset times and duration of sensory and motor block were similar between groups. Mean duration of analgesia for the five nerves was between 11.3 and 14.3 hr with ropivacaine and between 10.3 and 17.1 hr with bupivacaine. Quality of muscle relaxation judged as excellent by the investigators was not significantly different (ropivacaine - 35/49, bupivacaine - 30/49). The median time to first request for analgesia was comparable between the two groups (11-12 hr). One patient developed a grand mal seizure shortly after receiving bupivacaine and recovered consciousness within 30 min. There were no serious adverse events in the ropivacaine group. CONCLUSIONS Thirty ml ropivacaine 7.5 mg x ml(-1) (225 mg) produced effective and well tolerated brachial plexus block of long duration by the subclavian perivascular route. In this study, the results were similar to those of 30 ml bupivacaine 5.0 mg x ml(-1).
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Affiliation(s)
- H Vaghadia
- Department of Anaesthesia, Vancouver General Hospital, BC, Canada.
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Schares G, Rauser M, Zimmer K, Peters M, Wurm R, Dubey JP, de Graaf DC, Edelhofer R, Mertens C, Hess G, Conraths FJ. Serological differences in Neospora caninum-associated epidemic and endemic abortions. J Parasitol 1999; 85:688-94. [PMID: 10461950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/13/2023] Open
Abstract
A sandwich enzyme-linked immunosorbent assay (ELISA) for the sensitive and specific detection of bovine antibodies to Neospora caninum was developed and evaluated using sera from cattle experimentally infected with N. caninum, Toxoplasma gondii, Sarcocystis cruzi, Sarcocystis hominis, Sarcocystis hirsuta, Eimeria bovis, Cryptosporidium parvum, Babesia divergens, and field sera from naturally exposed animals. Field sera were classified using a gold standard that included the results from an indirect fluorescent antibody test (IFAT) and an immunoblot (IB). Based on these gold standard results, i.e., IFAT-IB results, an equal relative sensitivity and specificity of 94.2%(theta0) was reached when a cutoff of 0.034 (d0) was employed. The analysis of IFAT-IB-positive field sera showed that within groups of aborting and nonaborting dams, the animals from herds with endemic N. caninum-associated abortions had significantly higher ELISA indices than animals from herds with N. caninum-associated epidemic abortions. By contrast, IFAT-IB-positive aborting dams from herds with endemic N. caninum-associated abortions had significantly lower IFAT titers than IFAT-IB-positive aborting dams from herds with epidemic N. caninum-associated abortions. This is the first time that statistically significant serological differences between herds exhibiting epidemic and endemic N. caninum-associated abortions are described.
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Affiliation(s)
- G Schares
- Institute for Epidemiological Diagnostics, Federal Research Centre for Virus Diseases of Animals, Wusterhausen, Germany
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Zimmer K, Dräger KG, Klawonn W, Hess RG. Contribution to the diagnosis of Johne's disease in cattle. Comparative studies on the validity of Ziehl-Neelsen staining, faecal culture and a commercially available DNA-Probe test in detecting Mycobacterium paratuberculosis in faeces from cattle. Zentralbl Veterinarmed B 1999; 46:137-40. [PMID: 10216457 DOI: 10.1111/j.0931-1793.1999.00214.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In the present study, 132 selected faecal samples from clinically affected and subclinically infected cattle from dairy herds known to be affected by Johne's disease were investigated for the presence of Mycobacterium paratuberculosis using Ziehl-Neelsen staining, faecal culture and a commercially available DNA-Probe test. The sensitivity was 36.4% for Ziehl-Neelsen staining, 85.6% for faecal culture and 47.7% for the DNA-Probe test. Proving the presence of acid-fast bacteria in 49.3% of the samples from clinically affected cattle and 19.3% of those from subclinically infected cattle, Ziehl-Neelsen staining had the lowest detection rate of the three tests under investigation. Faecal culture showed the highest detection rate of M. paratuberculosis in samples from both clinically affected (84.0%) and subclinically infected (87.7%) animals. The DNA-Probe test showed a positive result in 68.0% of the samples from clinically affected cattle and 21.1% of those from subclinically infected cattle. Ziehl-Neelsen staining proved unreliable in diagnosing Johne's disease. Faecal culture was the most sensitive method for detecting M. paratuberculosis both in clinically affected and subclinically infected cattle. The sensitivity of a commercially available DNA-Probe test has to be enhanced to enable a quick and reliable diagnosis of Johne's disease.
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Affiliation(s)
- K Zimmer
- Landesveterinäruntersuchungsamt Rheinland-Pfalz, Koblenz, Germany
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Hurtado C, Bradley J, Burns AR, Bradley J, Karkouti K, Hurtado C, Burns AR, Bradley J, Anderson R, Abrahamson SD, Mazer CD, Hung OR, Comeau L, Fisher JA, Tessler J, Rucker J, Mathicu A, Murray-Foster S, Tz-Chong C, Chi-Yuan L, Tsuda T, Tabuchi A, Sasano H, Kiriyama M, Okada A, Hayano J, Takeuchi A, Katsuya H, Tousignant CP, Mazer CD, Tousignant CP, Mazer CD, Ling E, Arellano R, Dowd N, Karski J, Cheng D, Carroll-Munro J, Rose DK, Mazer CO, Cohen MM, Wigglesworth D, McKay WPS, Teskey RJ, Militzer J, Kember G, Blanchet T, Gregson PH, Howells SR, Robblee JA, Breen TW, Dierenfield L, McNeil T, Breen TW, McNeil T, Dierenfield L, Nicholson DJ, Kowalski SE, Hamilton GA, Meyers MP, Serrette C, Duke PC, Custeau I, Martin R, Larabée S, Pirlet M, Pilote M, Tetrault JP, Tsui BCH, Gupta S, Finucane B, Weisbrod MJ, Chan VWS, Kaszas Z, Dragomir C, Cohen MR, Gandhi M, Clanachan AS, Finegan BA, Isaac L, Splinter WM, Hall LA, Gould HM, Rhine EJ, Bergeron L, Girard M, Drolet P, Truong HHL, Boucher C, Vézina D, Lessard MR, Gourdeau M, Trépanier CA, Yang T, Breen TW, Macarthur A, Chouinard P, Fugère F, Ruel M, Tarkkila P, Silvasti M, Tuominen M, Svartling N, Rosenberg PH, Bond DM, Rudan JF, Adams MA, Tsang BK, Keahey W, Gagliese L, Jackson M, Ritvo P, Wowk A, Sandler AN, Katz J, Laffey JG, Boylan JF, Badner NH, Komar WE, Bond DM, Cherry RA, Spadafora SM, Butler RJ, McHardy F, Fortier J, Chung F, Marshall S, Krishnathas A, Wong J, Chung F, Ritchie E, McHardy F, Marshall S, Fortier J, Meikle A, Avery N, van Vlymen J, Parlow JL, Sinclair D, Chung F, Mezei G, Jin F, Chung F, Norris A, Ganeshram T, MacLeod BA, Azmudéh A, Franciosi LG, Ries CR, Schwarz SKW, McKay WPS, Gregson PH, McKay BWS, Blanchet T, Meuret P, Bonhomme V, Plourde G, Fiset P, Backman SB, Vesely A, Takeuchi A, Sommer L, Rucker J, Greenwald J, Lavine E, Iscoe S, Volgyesi G, Fedorko L, Fisher J, Lobato EB, Sulek CA, Davies LK, Gearen PF, Bellemare F, Donati F, Couture J, Joo HS, Rose DK, Kapoor S, Shayan S, Karkouti K, LeDez KM, Au J, Tucker JH, Redmond EB, Gadag V, Penney C, Hare GMT, Lee TDG, Hirsch GM, Yang F, Troncy E, Blaise G, Naito Y, Arisawa S, Ide M, Nakano S, Yamazaki K, Kawamura T, Nara N, Wakusawa R, Inada K, Hudson RJ, Singh K, Harding GA, Henderson BT, Thomson IR, Harding GA, Hudson RJ, Thomson IR, Thomson IR, Singh K, Hudson RJ, Wherrett CG, Miller DR, Giachino AA, Turek MA, Rody K, Vaghadia H, Chan V, Ganapathy S, Lui A, McKenna J, Zimmer K, Schwarz SKW, MacLeod BA, Ries CR, Franciosi LG, Regan WD, Davidson RG, Nevin K, Escobedo S, Mitmaker E, Tessler MJ, Kardash K, Kleiman SJ, Rossignol M, Kahn L, Baxter F, Dauphin A, Goldsmith C, Jackson P, McChesney J, Miller J, Takeuchi L, Young E, Klubien K, Bandi E, Carli F, Dattilo K, Tong D, Bhandari M, Carli F, Klubien K, Mazza L, Wykes L, Sommer LZ, Rucker J, Veseley A, Levene E, Greenwald Y, Volgyesi G, Fedorko L, Iscoe S, Fisher JA, Tian GF, Baker AJ, Reinders FX, Baker AJ, Moulton RJ, Brown JIM, Schlichter L, Troncy E, Van Tulder L, Carignan S, Prénovault J, Collet JP, Shapiro S, Guimond JG, Blait L, Ducruet T, Francœur M, Charbonneau M, Cousineau G, Blaise G, Wong DR, McCall M, Walsh F, Kurian R, Keith M, Sole MJ, Jeejeebhoy KN, Mazer CD, Whitten E, Norman PH, Aucar JA, Coveler LA, Solgonick RM, Bastien Y, Mazer B, Lihara K, Orser BA, Tymianski M, Finucane BT, Zaman N, Kashkari I, Tawfik S, Tarn YK, Slinger PD, McRae K, Winton T, Sandier AN, Zamora JE, Salpeter MJ, Bai D, MacDonald JF, Orser BA, Mayson K, Gofton E, Chambers K, Belo SE, Kay JC, Mazer CD, Hall SRR, Wang L, Milne B, Loomis C, Tsang BK, He Z, Wougchanapai W, Ho IK, Eichhorn JH, Tsang BK, Ma T, Wongchanapai W, He Z, Ho IK, Eicnhorn JH, Tsang BK, Wongchanapai W, He Z, Ho IK, Eichhorn JH, Murphy DB, Murphy MB, Bonhomme V, Meuret P, Backman SB, Plourde G, Fiset P, Stein RD, Backman SB, Collier B, Polosa C, Li CY, Chou TC, Wang JY, Fuller J, Butler R, Spadafora S, Donen N, Brownell L, Donen N, Brownell L, Shysh S, Carter K, Eagle C, Devito I, Halpern S, Devitt JH, Yee DA, deLacy JL, Oxorn DC, Morris GF, Yip RW, Gregoret-Quinn MG, Seal RF, Smith LJ, Jones AB, Tang C, Clanachan AS, Gallant BJ, Nadwidny LA, Goresky GV, Cowtan T, Bridge HS, Montgomery CJ, Kennedy RA, Merrick PM, Yamashita M, Wada K, LeMay S, Hardy JF, Morgan P, Halpern S, Evers J, Ronaldson P, Rose DK, Dexter F, Cohen MM, Wigglesworth D, Writer D, Muir H, Shukla R, Nunn R, Scovil J, Pridham J, Rosaeg O, Sandier A, Morley-Foster P, Lucy S, Crone LA, Zimmer K, Wilson DJ, Heid R, Douglas MJ, Rurak DW, Fabrizi A, Crochetière CT, Roy L, Villeneuve E, Lortie L, Katsiris S, Leighton B, Halpern S, Wilson D, Kronberg J, Swica L, Midgley J, Nunn R, Muir H, Shukla R, Smith B, Rooney ME, Campbell DC, Riben CM, Crone LA, Yip RW, Halpern S, Halpern S, MacDonell J, Levine T, Wilson D. Abstracts. Can J Anaesth 1998. [PMCID: PMC7103902 DOI: 10.1007/bf03019217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Abstract
Individual differences in objective effects of noise on performance were analyzed with respect to their distribution, temporal stability, and the precision of measurement to be attained. Seventy-two subjects had to memorize sequences of visually presented digits while being exposed to one of three auditory background conditions which were randomly mixed on a trial-by-trial basis: (1) foreign speech; (2) pink noise; and (3) silence. Individual "irrelevant speech effects," operationalized by the difference in recall errors under speech and in silence, were normally distributed over a wide range extending from slight facilitation to severe disruption. When 25 subjects repeated the experiment after four weeks, the individual differences were replicated with a reliability of rtt = 0.45. Internal consistency, a measure of the precision with which individual effects can be measured in a single session, was moderate (alpha = 0.55). However, both retest, and consistency coefficients are severely attenuated by the use of (sound-minus-silence) difference scores, the reliability of which is bound to be considerably lower than that of the original error scores whenever these are correlated. Given that the original error rates in a specific auditory condition can be determined with reliabilities approaching 0.85, it may be concluded that individual performance decrements due to noise can be reliably measured in the "irrelevant speech" paradigm. Self-report measures of noise susceptibility collected to explore potential sources of the large inter-individual variation exhibited only weak relationships with the objectively measured noise effects: Subjects were quite inaccurate in assessing their individual impairment in the three auditory conditions, and a questionnaire-based measure of general noise sensitivity only accounted for a small portion of the variance in objectively measured performance decrements, although in both cases the predictive relationship was much stronger in female than in male subjects.
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Affiliation(s)
- W Ellermeier
- Institut für Psychologie der Universität Regensburg, Germany.
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Lantzsch J, Bushaw BA, Bystrow VA, Herrmann G, Kluge HJ, Niess S, Otten EW, Passler G, Schwalbach R, Schwarz M, Stenner J, Trautmann N, Wendt K, Yushkevich YV, Zimmer K. Trace determination of 90Sr and 89Sr in environmental samples by collinear resonance ionization spectroscopy. ACTA ACUST UNITED AC 1995. [DOI: 10.1063/1.47620] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Bushaw BA, Kluge HJ, Lantzsch J, Schwalbach R, Stenner J, Stevens H, Wendt K, Zimmer K. Hyperfine structure in 5s 4d 3 D ?5snf transitions of87Sr. ACTA ACUST UNITED AC 1993. [DOI: 10.1007/bf01437259] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Zimmer K, Wiegand D, Manz D, Frost JW, Reinacher M, Frese K. Evaluation of five different methods for routine diagnosis of rabies. Zentralbl Veterinarmed B 1990; 37:392-400. [PMID: 2204250 DOI: 10.1111/j.1439-0450.1990.tb01074.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Brain tissue from 187 animals of different species was investigated by means of fluorescent antibody test, peroxidase anti-peroxidase technique, mouse inoculation test and cell culture technique for a diagnosis of rabies. With peroxidase anti-peroxidase technique the rabies specific reaction comprised inclusion bodies and a granular staining of the cytoplasm of affected cells. A specific positive reaction was found only in neurons, in which perikaryon as well as cell processes were affected. Fluorescent antibody test and peroxidase anti-peroxidase technique detected 98% each, mouse inoculation test 95% and cell culture technique 81% of the rabies positive animals. In conclusion, peroxidase anti-peroxidase technique allows a highly reliable diagnosis of rabies when only formalin-fixed and paraffin-embedded material is available. Histopathological alterations comprising Negri bodies, inflammatory and degenerative lesions were encountered in 53% of the rabies positive brains.
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Affiliation(s)
- K Zimmer
- Institut für Veterinär-Pathologie der Justus-Liebig-Universität Giessen
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Hagendorff A, Zimmer K, Grote J. A new model for long-term investigations of cerebral oxygen supply in rats. Adv Exp Med Biol 1990; 277:145-50. [PMID: 2096621 DOI: 10.1007/978-1-4684-8181-5_19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- A Hagendorff
- Department of Physiology I, University of Bonn, FRG
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Grote J, Siegel G, Zimmer K, Adler A. The interaction between oxygen and vascular wall. Adv Exp Med Biol 1989; 248:575-81. [PMID: 2782175 DOI: 10.1007/978-1-4684-5643-1_64] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
In vascular strips of canine carotid arteries stepwise lowering of oxygen tension from hyperoxic levels of 550 mmHg to 20 mmHg caused in preparations with endothelium a dose-dependent hyperpolarization and relaxation of smooth muscle cells when oxygen tensions between approximately 150 mmHg and 35 mmHg were attained. Pronounced hypoxia with oxygen tensions below 30 mmHg induced a depolarisation and an increase in force generation. During comparable investigations on vessel preparations without endothelium only a slight hyperpolarization and relaxation of the smooth muscle were observed when decreasing the oxygen tension from 550 mmHg to approx. 35 mmHg. In the presence of indomethacin (10(-5) M) a small but significant reduction in the hypoxia-induced hyperpolarization and decrease in smooth muscle tone was found in intact vascular strips with endothelium. Depolarisation and contraction occurred at oxygen tensions below approx. 50-60 mmHg.
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Affiliation(s)
- J Grote
- Institute of Physiology I, University of Bonn, Germany
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Abstract
Demand oxygen systems have been shown to be effective in treating hypoxemia during seated rest and during exercise, but the performance of these systems during sleep has not been previously studied. We compared the efficacy of a new demand oxygen saver system with that of continuous flow nasal oxygen during the usual activities of daily life including sleep, seated rest, and exercise. Six hypoxemic patients were studied. All six had chronic obstructive pulmonary disease, though one patient had kyphoscoliosis with mixed obstructive and restrictive lung disease. Patients were studied during each activity of daily life while receiving supplemental oxygen by continuous flow nasal cannula at 2 liters per minute and during use of the demand oxygen saver system. The demand oxygen system produced arterial oxygenation equivalent to continuous flow nasal cannula under all conditions while utilizing substantially less oxygen. When compared with administration of oxygen by continuous flow nasal cannula, the demand oxygen saver cannula utilized only 45 percent as much oxygen during seated rest, 44 percent as much oxygen during exercise, and 39 percent as much oxygen during sleep. Our data support the use of demand oxygen systems for treatment of hypoxemia in patients with chronic obstructive lung disease.
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Grote J, Siegel G, Zimmer K, Adler A. The influence of oxygen tension on membrane potential and tone of canine carotid artery smooth muscle. Adv Exp Med Biol 1988; 222:481-7. [PMID: 3364274 DOI: 10.1007/978-1-4615-9510-6_57] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
In vascular smooth muscle of canine carotid artery segments the decrease in oxygen tension from approximately 550 mmHg to approximately 30 mmHg leads to a dose-dependent hyperpolarization and relaxation of the vessel strip. At PO2 values below approximately 15-20 mmHg depolarization and subsequent contraction were found. All changes of the parameters investigated were reversible. Indomethacin (10(-5) M) had no significant effect on the hypoxia-dependent potential and tension changes. The hyperpolarized part of the activation curve was obtained by plotting tension versus membrane potential values.
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Affiliation(s)
- J Grote
- Institute of Physiology I, University of Bonn, Germany
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Danzer K, Flórián K, Singer R, Mäurer F, El-Nady ABM, Zimmer K. Investigation of the origin of archaeological glass artefacts by means of pattern recognition. Anal Chim Acta 1987. [DOI: 10.1016/s0003-2670(00)85347-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Kusser W, Zimmer K, Fiedler F. Characteristics of the binding of aminoglycoside antibiotics to teichoic acids. A potential model system for interaction of aminoglycosides with polyanions. Dev Dyn 1985; 243:117-31. [PMID: 2411558 DOI: 10.1002/dvdy.24060] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2013] [Revised: 08/09/2013] [Accepted: 08/30/2013] [Indexed: 12/15/2022] Open
Abstract
The binding of the aminoglycoside antibiotic dihydrostreptomycin to defined cell-wall teichoic acids and to lipoteichoic acid isolated from various gram-positive eubacteria was followed by equilibrium dialysis. Dihydrostreptomycin was used at a wide range of concentration under different conditions of ionic strength, concentration of teichoic acid, presence of cationic molecules like Mg2+, spermidine, other aminoglycoside antibiotics (gentamicin, neomycin, paromomycin). Interaction of dihydrostreptomycin with teichoic acid was found to be a cooperative binding process. The binding characteristics seem to be dependent on structural features of teichoic acid and are influenced by cationic molecules. Mg2+, spermidine and other aminoglycosides antibiotics inhibit the binding of dihydrostreptomycin to teichoic acid competitively. The binding of aminoglycosides to teichoic acids is considered as a model system for the interaction of aminoglycoside antibiotics with cellular polyanions. Conclusions of physiological significance are drawn.
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Kusser W, Zimmer K, Fiedler F. Characteristics of the binding of aminoglycoside antibiotics to teichoic acids. A potential model system for interaction of aminoglycosides with polyanions. Eur J Biochem 1985; 151:601-5. [PMID: 2411558 DOI: 10.1111/j.1432-1033.1985.tb09146.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The binding of the aminoglycoside antibiotic dihydrostreptomycin to defined cell-wall teichoic acids and to lipoteichoic acid isolated from various gram-positive eubacteria was followed by equilibrium dialysis. Dihydrostreptomycin was used at a wide range of concentration under different conditions of ionic strength, concentration of teichoic acid, presence of cationic molecules like Mg2+, spermidine, other aminoglycoside antibiotics (gentamicin, neomycin, paromomycin). Interaction of dihydrostreptomycin with teichoic acid was found to be a cooperative binding process. The binding characteristics seem to be dependent on structural features of teichoic acid and are influenced by cationic molecules. Mg2+, spermidine and other aminoglycosides antibiotics inhibit the binding of dihydrostreptomycin to teichoic acid competitively. The binding of aminoglycosides to teichoic acids is considered as a model system for the interaction of aminoglycoside antibiotics with cellular polyanions. Conclusions of physiological significance are drawn.
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Grote J, Steuer K, Müller R, Söntgerath C, Zimmer K. O2 and CO2 solubility of the fluorocarbon emulsion fluosol-DA 20% and O2 and CO2 dissociation curves of blood-fluosol-DA 20% mixtures. Adv Exp Med Biol 1985; 191:453-61. [PMID: 3938602 DOI: 10.1007/978-1-4684-3291-6_46] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Grote J, Zimmer K, Schubert R. Tissue oxygenation in normal and edematous brain cortex during arterial hypocapnia. Adv Exp Med Biol 1984; 180:179-84. [PMID: 6442823 DOI: 10.1007/978-1-4684-4895-5_16] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Zimmer K, Flórián K, Caroli S. Spectrochemical analysis of biological materials. Ann Ist Super Sanita 1983; 19:509-21. [PMID: 6544571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
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Caroli S, Alimonti A, Petrucci F, Zimmer K. Development of a hollow cathode method for the spectroanalytical determination of trace elements in biological materials. Ann Ist Super Sanita 1983; 19:495-502. [PMID: 6544569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
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Grote J, Zimmer K, Schubert R. Effects of severe arterial hypocapnia on regional blood flow regulation, tissue PO2 and metabolism in the brain cortex of cats. Pflugers Arch 1981; 391:195-9. [PMID: 6812015 DOI: 10.1007/bf00596170] [Citation(s) in RCA: 56] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The effect of a stepwise decrease in PaCO2 from 3.9-1.6 kPa on rCBF, rCMRO2, tissue PO2 and concentrations of glucose, lactate, pyruvate, ATP, ADP, AMP and phosphocreatine in the brain cortex was studied in cats lightly anaesthetized with sodium pentobarbital. 1. Moderate lowering of PaCO2 to 2.5 kPa induced in all animals a homogeneous decrease of rCBF in corresponding areas of the right and left hemisphere. Mean rCBF fell from 129.2 to 103.1 ml X 100 g-1 X min-1, while rCMRO2 remained unchanged (12.7-12.9 ml X 100 g-1 X min-1). The tissue PO2 frequency histograms showed a shift to lower values without indicating the presence of brain tissue hypoxia. 2. Severe arterial hypocapnia (PaCO2 = 1.6 kPa) caused an inhomogeneous blood flow reaction. Both further decreased as well as increased rCBF values were measured simultaneously in the brain cortex of individual animals (mean rCBF = 97.6 ml X 100 g-1 X min-1). At the same time tissue PO2 measurements and metabolite assays indicated the presence of pronounced brain tissue hypoxia. The tissue concentrations of lactate and pyruvate and the lactate/pyruvate ratio were significantly increased, while the phosphocreatine concentration was significantly reduced. In addition, rCMRO2 decreased to 11.3 ml X 100 g-1 X min-1. The results provide conclusive evidence that severe arterial hypocapnia leads to an insufficient O2 supply of the brain cortex, which in turn seems to counteract the influence of hypocapnia on cortical blood flow regulation.
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Meyer J, Jensch P, Zimmer K, Braun PC, Hagemann K, Platte G, Ameling W, Effert S. [Computer system for the automatic analysis of cath-lab data. Reliability of pattern-recognition and measurements (author's transl)]. Klin Wochenschr 1978; 56:81-91. [PMID: 628194 DOI: 10.1007/bf01480088] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The computer-system for the on-line-analysis of hemodynamic data developed in Aachen enables the clinical user to perform the immediate on-line analysis of ECG, pressure-curves and thermo- or dye-dilution-curves in a dialog mode. The procedure of pressure analysis as well as the calculations by the computer for the individual haemodynamic parameters are described. The comparison of the medical-manual evaluation of the pressure curves on paper-registration and the computer results of the same measurement shows a very good correlation for wave-recognitions and wave-measurements for this system, integrated in the daily routine since 24 months. As well in the application of various fluid-filled catheters used in praxis as in tip-manometers it could be proved for the pressure-analysis in the different positions of the heart, that the computer-system produced reliable evaluations for all catheter materials used. The flexible conception of the computer program with its fast adaption to new problems allows its use not only in the clinical routine, but also and especially in the handling of scientific questions in the frame-work of haemodynamic analysis.
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Zimmer K, Müller K, Lange J, Schneider W. [Our experience with Spasmalgan ampules in labor]. Zentralbl Gynakol 1974; 96:1530-3. [PMID: 4617464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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