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Pascale F, Gueddida S, Doll K, Dovesi R. Band gap, Jahn-Teller deformation, octahedra rotation in transition metal perovskites LaTiO 3 . J Comput Chem 2024; 45:683-694. [PMID: 38095335 DOI: 10.1002/jcc.27274] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Revised: 11/15/2023] [Accepted: 11/17/2023] [Indexed: 03/02/2024]
Abstract
The LaTiO3 perovskite (where Ti is in a d1 state) is investigated by using an all electron Gaussian basis and many functionals, ranging from pure GGA (PBE), to hybrids (full range, B3LYP and PBE0, and range separated, HSE06) to Hartree Fock. Recently, Varignon et al. (Phys. Rev. Res 1, 033131, 2019), showed that, when GGA+U or HSE06 are used, a metallic solution and fractional occupancy of the t2 g subshell are obtained. Here, it is shown that when a full range hybrid functional is used, an integer occupancy is obtained, as suggested by the Jahn-Teller theorem. When the exact exchange percentage varies from 0 to 100, the system is insulating when it exceeds 20. By reducing progressively the symmetry from cubic down to orthorhombic, the relative importance of the Jahn-Teller deformation and of the rotation of the octahedra is explored.
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Affiliation(s)
- F Pascale
- Université de Lorraine-Nancy, CNRS, LEMTA, Nancy, France
| | - S Gueddida
- Université de Lorraine-Nancy, CNRS, LPCT, UMR, Vandoeuvre-lés-Nancy, France
| | - K Doll
- University of Stuttgart, Molpro Quantum Chemistry Software, Institute of Theoretical Chemistry, Stuttgart, Germany
| | - R Dovesi
- Accademia Delle Science di Torino, Torinoto, Italy
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Souissi B, Larbi T, Masri R, Hajjaji A, Doll K, Amlouk M. Accurate density functional theory prediction of low-dimensional yttrium nitride: From 2D hexagonal and square monolayers to 1D zizag single walled nanotubes. Spectrochim Acta A Mol Biomol Spectrosc 2024; 304:123434. [PMID: 37738765 DOI: 10.1016/j.saa.2023.123434] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2023] [Revised: 08/28/2023] [Accepted: 09/18/2023] [Indexed: 09/24/2023]
Abstract
Through this contribution, we aim to highlight the structural stability of low dimensional YN structures ranging from the 3D bulk to the 2D square and hexagonal monolayers and their corresponding 1D zigzag single walled nanotubes. For all arrangements, geometry optimization is achieved at the DFT/B3LYP level of theory using a Gaussian basis set. Then, the coupled perturbed Kohn-Sham and Hartree-Fock (CPKS/HF) computational approach is used to simulate Raman and IR spectrum. Rolling, cohesive and relaxation energies, electronic and vibrational contributions to the polarizability and equilibrium lattice parameters are also reported. Insights into their structural stability are provided by combining optimized parameters and vibrational phonon spectra. For the optimized 3D bulks, 2D monolayers and 1D square nanotubes, no imaginary frequency has been recorded in their vibrational spectra which reveals a dynamic stability. Likewise, imaginary frequencies appeared only for relatively large YN (n,0) single walled hexagonal nanotubes (n > 6) indicating that the optimized structures are not a real global minimum and implying a dynamic instability. A scaning mode procedure along the largest imaginary vibrational mode has been adopted to obtain the equilibrium geometry of (22,0) YN hexagonal nanotube. Therefore, it must be emphasized that the obtained potential energy surface presents two minima between a saddle point. These minima corresponds to a stable structures slightly distorted compared to the initial one. The absence of imaginary phonon frequencies in the Raman and IR spectra of the optimized (22,0) YN hexagonal nanotube confirms its structural stability.
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Affiliation(s)
- B Souissi
- Laboratoire de Nanomateriaux Nanotechnologie et Energie, Faculte des sciences de Tunis, Universite de Tunis, El Manar, 2092 Tunis, Tunisia
| | - T Larbi
- Laboratoire de Nanomateriaux Nanotechnologie et Energie, Faculte des sciences de Tunis, Universite de Tunis, El Manar, 2092 Tunis, Tunisia; Université de Tunis, IPEIT, 2, Rue Jawaher Lel Nehru, Montfleury, Tunis 1089, Tunisia.
| | - R Masri
- Laboratoire de Nanomateriaux Nanotechnologie et Energie, Faculte des sciences de Tunis, Universite de Tunis, El Manar, 2092 Tunis, Tunisia
| | - A Hajjaji
- Laboratoire de Photovoltaïque, Centre de Recherches et des Technologies de l'Energie, Technopole de Borj-Cédria, BP 95 Hammam-Lif, Tunis 2050, Tunisia
| | - K Doll
- University of Stuttgart, Molpro Quantum Chemistry Software, Institute for Theoretical Chemistry, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
| | - M Amlouk
- Laboratoire de Nanomateriaux Nanotechnologie et Energie, Faculte des sciences de Tunis, Universite de Tunis, El Manar, 2092 Tunis, Tunisia
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Gamble CR, Doll K. Miles to go: social inequity and endometrial cancer survival. BJOG 2021; 128:1225. [PMID: 33656235 DOI: 10.1111/1471-0528.16662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Accepted: 01/28/2021] [Indexed: 11/30/2022]
Affiliation(s)
- C R Gamble
- Weill Cornell Medical College, New York, NY, USA
| | - K Doll
- University of Washington School of Medicine, Washington, DC, USA
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Subh L, Correa W, Pinkvos T, Behrens P, Brandenburg K, Gutsmann T, Stiesch M, Doll K, Winkel A. Synthetic anti‐endotoxin peptides interfere with Gram‐positive and Gram‐negative bacteria, their adhesion and biofilm formation on titanium. J Appl Microbiol 2020; 129:1272-1286. [DOI: 10.1111/jam.14701] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Revised: 02/18/2020] [Accepted: 05/06/2020] [Indexed: 12/20/2022]
Affiliation(s)
- L. Subh
- Clinic of Prosthetic Dentistry and Biomedical Materials ScienceHannover Medical School Hannover Germany
| | - W. Correa
- Division of Biophysics Research Center Borstel – Leibniz Lung Center Borstel Germany
| | - T.‐J. Pinkvos
- Institute for Inorganic Chemistry Leibniz University of Hannover Hannover Germany
| | - P. Behrens
- Institute for Inorganic Chemistry Leibniz University of Hannover Hannover Germany
| | | | - T. Gutsmann
- Division of Biophysics Research Center Borstel – Leibniz Lung Center Borstel Germany
| | - M. Stiesch
- Clinic of Prosthetic Dentistry and Biomedical Materials ScienceHannover Medical School Hannover Germany
| | - K. Doll
- Clinic of Prosthetic Dentistry and Biomedical Materials ScienceHannover Medical School Hannover Germany
| | - A. Winkel
- Clinic of Prosthetic Dentistry and Biomedical Materials ScienceHannover Medical School Hannover Germany
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Muturi EJ, Doll K, Berhow M, Flor-Weiler LB, Rooney AP. Honeysuckle essential oil as a potential source of ecofriendly larvicides for mosquito control. Pest Manag Sci 2019; 75:2043-2048. [PMID: 30632272 DOI: 10.1002/ps.5327] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Revised: 12/19/2018] [Accepted: 01/07/2019] [Indexed: 06/09/2023]
Abstract
BACKGROUND Some plant essential oils have insecticidal properties against mosquitoes and can be harnessed as ecofriendly tools for mosquito control. We conducted bioassays to determine the toxicity of Italian honeysuckle (Lonicera caprifolium) essential oil and its fractions against larvae of the yellow fever mosquito, Aedes aegypti. RESULTS Sixteen constituents were identified in honeysuckle essential oil compared to 15, 15, 15, and 11 constituents in fractions A, B, C, and E, respectively. The chemical constituents for fraction D were not determined due to lack of enough fraction sample. The two major constituents identified were patchouli alcohol (29.3%) and 6-acetyl-1,1,2,4,4,7-hexamethyltetralin (20.6%) in whole essential oil, alpha-bulnesene (27.6%) and 6-acetyl-1,1,2,4,4,7-hexamethyltetralin (23.2%) in fraction A, unknown chemical (47.3%) and diethyl phthalate (19.5%) in fraction B, unknown chemical (38.3%) and diethyl phthalate (23.2%) in fraction C, and patchouli alcohol (58.7%) and diethyl phthalate (20.5%) in fraction E. The LC50 for whole essential oil was 34.4 ppm and significantly higher than 20.6, 19.7, 18.6, and 17.7 ppm for fractions B, C, D, and E, respectively. In contrast, fraction A was inactive. At 50 ppm, all individual constituents tested were less toxic than the whole essential oil with exception of patchouli alcohol, which caused 100% mortality. CONCLUSION These findings suggest that patchouli alcohol is one of the chemical constituents responsible for bioactivity of honeysuckle essential oil and some of its fractions. The findings also demonstrate that honey suckle essential oil and its fractions can be exploited as a source of ecofriendly larvicides for mosquito control. Published 2019. This article is a U.S. Government work and is in the public domain in the USA.
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Affiliation(s)
- Ephantus J Muturi
- Crop Bioprotection Research Unit, U.S. Department of Agriculture, Agricultural Research Service, National Center for Agricultural Utilization Research, Peoria, IL, USA
| | - Kenneth Doll
- Bio-Oils Research Unit, U.S. Department of Agriculture, Agricultural Research Service, National Center for Agricultural Utilization Research, Peoria, IL, USA
| | - Mark Berhow
- Functional Foods Research Unit, U.S. Department of Agriculture, Agricultural Research Service, National Center for Agricultural Utilization Research, Peoria, IL, USA
| | - Lina B Flor-Weiler
- Crop Bioprotection Research Unit, U.S. Department of Agriculture, Agricultural Research Service, National Center for Agricultural Utilization Research, Peoria, IL, USA
| | - Alejandro P Rooney
- Crop Bioprotection Research Unit, U.S. Department of Agriculture, Agricultural Research Service, National Center for Agricultural Utilization Research, Peoria, IL, USA
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Jorge S, Kay A, Doll K, Norquist B, Pennington K, Urban R, Swisher E, Gray H. Intraperitoneal chemotherapy is equally safe and effective in ovarian cancer patients with and without Germline BRCA1 or BRCA2 mutations. Gynecol Oncol 2019. [DOI: 10.1016/j.ygyno.2019.03.232] [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: 11/26/2022]
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Larbi T, Doll K, Amlouk M. Temperature dependence of Raman spectra and first principles study of NiMn 2O 4 magnetic spinel oxide thin films. Application in efficient photocatalytic removal of RhB and MB dyes. Spectrochim Acta A Mol Biomol Spectrosc 2019; 216:117-124. [PMID: 30884350 DOI: 10.1016/j.saa.2019.03.022] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Revised: 01/30/2019] [Accepted: 03/10/2019] [Indexed: 06/09/2023]
Abstract
Magnetic spinel oxide NiMn2O4 thin films were grown on glass substrates using the spray pyrolysis deposition technique at 350 °C. First, structural optimization, electronic structure and vibrational properties were obtained for NiMn2O4 by density functional theory (DFT) with an all electron basis set and the hybrid functional B3LYP implemented in the CRYSTAL14 code. Our DFT results show good agreement with previous experimental and theoretical data. Second, Raman spectra of as-prepared thin films have been measured over the temperature range from 100 K to 620 K. We report on the temperature dependence of their dominant first-order scattering F2g and A1g phonons modes. The phonon dynamic behavior is well described by a model taking into account explicit lattice anharmonicity associated to both cubic and quartic phonon decay processes and thermal expansion related quasiharmonicity. Finally, the photocatalytic activities of the obtained thin films were evaluated through the photocatalytic degradation of Rhodamine B (RhB) and methylene blue (MB) solutions under solar light irradiation as a function of time. All the results indicate that NiMn2O4 thin film can be used as a potential solar-light-driven photocatalyst.
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Affiliation(s)
- T Larbi
- Unité de physique des dispositifs a semi-conducteurs, Faculté des sciences de Tunis, Tunis El Manar University, 2092 Tunis, Tunisia; Université de Gafsa, Faculté des Sciences, campus universitaire Sidi Ahmed Zarroug, 2112 Gafsa, Tunisia.
| | - K Doll
- University of Stuttgart, Molpro Quantum Chemistry Software, Institute for Theoretical Chemistry, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
| | - M Amlouk
- Unité de physique des dispositifs a semi-conducteurs, Faculté des sciences de Tunis, Tunis El Manar University, 2092 Tunis, Tunisia
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Muturi EJ, Doll K, Ramirez JL, Rooney AP. Bioactivity of Wild Carrot (Daucus carota, Apiaceae) Essential Oil Against Mosquito Larvae. J Med Entomol 2019; 56:784-789. [PMID: 30566578 DOI: 10.1093/jme/tjy226] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Indexed: 06/09/2023]
Abstract
Invasive alien plants wreak havoc on native ecosystems and using them as a source of biopesticides could improve their management. We examined the toxicity of essential oil of wild carrot (also known as 'Queen Anne's Lace', Daucus carota Linnaeus), an aggressive invader throughout the United States, against Aedes aegypti L., Culex pipiens L., and Culex restuans Theobald larvae. Comparisons were made between essential oil extracted from umbels of local populations of wild carrot versus a commercial brand. Methyl isoeugenol (60.7%) was by far the most abundant constituent in commercial brand oil, whereas α-pinene (33.0%) and β-pinene (25.8%) were the dominant constituents in essential oil extracted from local wild carrot populations. The commercial brand essential oil was significantly more toxic to Cx. restuans larvae (LC50 = 44.4 ppm) compared with Cx. pipiens (LC50 = 51.0 ppm) and Ae. aegypti (LC50 = 54.5 ppm). Essential oil from local populations of wild carrot was significantly more toxic to both Cx. pipiens (LC50 = 42.9) and Cx. restuans (LC50 = 40.3) larvae compared with Ae. aegypti (LC50 = 64.6 ppm) larvae. Three of the nine tested chemical constituents of wild carrot essential oil (terpinolene, para cymene, and γ-terpinene) were consistently more toxic to larvae of the three mosquito species than the whole essential oil. These findings suggest that exploiting wild carrot essential oil and its chemical constituents as a biopesticide for mosquito control could be used as part of multifaceted approaches for controlling this invasive alien plant species.
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Affiliation(s)
- Ephantus J Muturi
- Crop Bioprotection Research Unit, Agricultural Research Service, U.S. Department of Agriculture, University Street, Peoria, IL
| | - Kenneth Doll
- Bio-Oils Research Unit, U.S. Department of Agriculture, ARS, Peoria, IL
| | - Jose L Ramirez
- Crop Bioprotection Research Unit, Agricultural Research Service, U.S. Department of Agriculture, University Street, Peoria, IL
| | - Alejandro P Rooney
- Crop Bioprotection Research Unit, Agricultural Research Service, U.S. Department of Agriculture, University Street, Peoria, IL
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Lehner S, Zerbin I, Doll K, Rehage J, Distl O. A genome-wide association study for left-sided displacement of the abomasum using a high-density single nucleotide polymorphism array. J Dairy Sci 2017; 101:1258-1266. [PMID: 29224884 DOI: 10.3168/jds.2017-13216] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [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: 05/23/2017] [Accepted: 10/19/2017] [Indexed: 11/19/2022]
Abstract
Left-sided displacement of the abomasum (LDA) is a frequent disease in dairy cattle causing significant financial losses for dairy farmers. Heritability (h2) of this complex disease was estimated at up to 0.5 in German Holstein (GH) cattle. Using the Bovine High Density BeadChip (Illumina Inc., San Diego, CA) comprising 588,753 single nucleotide polymorphisms (SNP) after quality control for 126 LDA cases and 280 population-based controls, we used a mixed linear model analysis in a genome-wide association study (GWAS). We identified 6 genomic regions for LDA on bovine chromosomes 2, 8, 13, 20, 24, and X that were significantly associated with LDA. Each of these regions was covered by 4 to 12 LDA-associated SNP. Single SNP within these regions explained up to 7.3% of the phenotypic variance. An independent sample of 1,554 GH cows, including 539 controls and 1,015 cases, were genotyped for 8 SNP highly associated with LDA on Bos taurus autosomes (BTA) 2, 8, 13, and 24, as well as 6 SNP located in previously identified LDA regions on BTA1, 5, 11, and 27 using competitive allele-specific PCR genotyping technology (KASP). The analysis using the KASP genotypes confirmed LDA-associated loci on BTA2, 8, 13, and 27. These genomic regions may contribute to the susceptibility to LDA in Holstein cows and may harbor functional variants for LDA.
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Affiliation(s)
- S Lehner
- Institute for Animal Breeding and Genetics, University of Veterinary Medicine Hannover, Bünteweg 17p, 30559 Hannover, Germany
| | - I Zerbin
- Institute for Animal Breeding and Genetics, University of Veterinary Medicine Hannover, Bünteweg 17p, 30559 Hannover, Germany
| | - K Doll
- Clinic for Ruminants and Swine, Faculty for Veterinary Medicine, Justus-Liebig-University Giessen, 35392 Giessen, Germany
| | - J Rehage
- Clinic for Cattle, University of Veterinary Medicine Hannover, 30173 Hannover, Germany
| | - O Distl
- Institute for Animal Breeding and Genetics, University of Veterinary Medicine Hannover, Bünteweg 17p, 30559 Hannover, Germany.
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Abstract
A quantum mechanical molecular mechanics (QM/MM) implementation for periodic systems is reported. This is done for the case of molecules and for systems with two and three-dimensional periodicity, which is suitable to model electrolytes in contact with electrodes. Tests on different water-containing systems, ranging from the water dimer up to liquid water indicate the correctness of the scheme. Furthermore, molecular dynamics simulations are performed, as a possible direction to study realistic systems.
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Affiliation(s)
- K. Doll
- Institut für Elektrochemie, Universität Ulm Albert Einstein-Allee 47, D-89081 Ulm, Germany
| | - T. Jacob
- Institut für Elektrochemie, Universität Ulm Albert Einstein-Allee 47, D-89081 Ulm, Germany Helmholtz-Institut Ulm (HIU), D-89069 Ulm, Germany
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Bretschneider C, Doll K, Bensen J, Gehrig P, Wu J, Geller E. Prevalence of Pelvic Floor Disorders in Women with Gynecologic Malignancies. J Minim Invasive Gynecol 2015. [DOI: 10.1016/j.jmig.2014.12.016] [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: 10/23/2022]
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Mahmoud A, Erba A, Doll K, Dovesi R. Pressure effect on elastic anisotropy of crystals fromab initiosimulations: The case of silicate garnets. J Chem Phys 2014; 140:234703. [DOI: 10.1063/1.4882699] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
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Doll K, Tseng J, Nickles Fader A, Gehrig P. The impact of tumor size and location in high-grade endometrial cancer patients undergoing minimally invasive surgery. Gynecol Oncol 2013. [DOI: 10.1016/j.ygyno.2013.04.240] [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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Doll K, Stine J, Moore D, Van Le L, Bae-Jump V, Brewster W, Soper J, Boggess J, Gehrig P, Kim K. The impact of outpatient hospice discussions on subsequent inpatient hospitalization in gynecologic oncology patients. Gynecol Oncol 2013. [DOI: 10.1016/j.ygyno.2013.04.398] [Citation(s) in RCA: 1] [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: 11/27/2022]
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Mömke S, Sickinger M, Lichtner P, Doll K, Rehage J, Distl O. Genome-wide association analysis identifies loci for left-sided displacement of the abomasum in German Holstein cattle. J Dairy Sci 2013; 96:3959-64. [PMID: 23548285 DOI: 10.3168/jds.2012-5679] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2012] [Accepted: 02/12/2013] [Indexed: 11/19/2022]
Abstract
Left-sided displacement of the abomasum (LDA) is one of the most common disorders of the digestive system in many dairy breeds and particularly in Holstein dairy cows. We performed a genome-wide association study for 854 German Holstein cows, including 225 cases and 629 controls. All cows were genotyped using the Illumina Bovine SNP50 BeadChip (Illumina Inc., San Diego, CA). After quality control of genotypes, a total of 36,226 informative single nucleotide polymorphisms (SNP) were left for analysis. We used a mixed linear model approach for a genome-wide association study of LDA. In total, 36 SNP located on 17 bovine (Bos taurus) chromosomes (BTA) showed associations with LDA at nominal -log10P-values >3.0. Two of these SNP, located on BTA11 at 46.70 Mb and BTA20 at 16.67 Mb, showed genome-wide significant associations with LDA at -log10P-values >4.6. Pathway analyses indicated genes involved in calcium metabolism and insulin-dependent diabetes mellitus to be factors in the pathogenesis of LDA in German Holstein cows.
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Affiliation(s)
- S Mömke
- Institute for Animal Breeding and Genetics, University of Veterinary Medicine Hannover, Bünteweg 17p, 30559 Hannover, Germany
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Kulkarni A, Schön JC, Doll K, Jansen M. Structure prediction of binary pernitride MN2 compounds (M=Ca, Sr, Ba, La, and Ti). Chem Asian J 2013; 8:743-54. [PMID: 23339076 DOI: 10.1002/asia.201200794] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2012] [Revised: 12/14/2012] [Indexed: 11/08/2022]
Abstract
Metal-pernitride compounds belong to a class of chemical systems in which both the complex ions and the non-bonding electrons may play roles in the formation of their modified crystalline structures. To investigate this issue, the energy landscapes of pernitrides of metals with different maximum valence (M=Ca, Sr, Ba, La, and Ti) were globally explored on the ab initio level at standard and high pressures, thereby yielding possible (meta)stable modifications in these systems together with information on how the landscape changed as function of the valence of the metal cation. For all of the systems in which no compounds had been synthesized so far, we predicted the existence of kinetically stable modifications that should, in principle, be experimentally accessible. In particular, TiN2 should crystallize in a new structure type, TiN2-I.
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Affiliation(s)
- A Kulkarni
- Max-Planck-Institut für Festkörperforschung, Heisenbergstr. 1, 70569 Stuttgart, Germany
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Doll K. On the gradient for metallic systems with a local basis set. Chem Phys Lett 2012. [DOI: 10.1016/j.cplett.2012.03.054] [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: 11/29/2022]
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Neelamraju S, Schön JC, Doll K, Jansen M. Ab initio and empirical energy landscapes of (MgF2)nclusters (n = 3, 4). Phys Chem Chem Phys 2012; 14:1223-34. [DOI: 10.1039/c1cp22446h] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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De La Pierre M, Orlando R, Maschio L, Doll K, Ugliengo P, Dovesi R. Performance of six functionals (LDA, PBE, PBESOL, B3LYP, PBE0, and WC1LYP) in the simulation of vibrational and dielectric properties of crystalline compounds. The case of forsterite Mg2SiO4. J Comput Chem 2011; 32:1775-84. [DOI: 10.1002/jcc.21750] [Citation(s) in RCA: 87] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2010] [Revised: 12/13/2010] [Accepted: 12/17/2010] [Indexed: 11/06/2022]
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Doll K, Gradishar W, Trosman J, Weldon C, Schink J. The impact of BRCA testing on surgical treatment decisions for patients with breast cancer. Gynecol Oncol 2011. [DOI: 10.1016/j.ygyno.2010.12.146] [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: 10/18/2022]
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Affiliation(s)
- A. Kulkarni
- Max Planck Institute for Solid State Research, Heisenbergstr. 1, D-70569 Stuttgart, Germany
| | - K. Doll
- Max Planck Institute for Solid State Research, Heisenbergstr. 1, D-70569 Stuttgart, Germany
| | - J. C. Schön
- Max Planck Institute for Solid State Research, Heisenbergstr. 1, D-70569 Stuttgart, Germany
| | - M. Jansen
- Max Planck Institute for Solid State Research, Heisenbergstr. 1, D-70569 Stuttgart, Germany
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Doll K, Schillinger D, Klee W. Der Glutaraldehyd-Test beim Rind - seine Brauchbarkeit für Diagnose und Prognose innerer Entzündungen. ACTA ACUST UNITED AC 2010. [DOI: 10.1111/j.1439-0442.1985.tb01978.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Mömke S, Scholz H, Doll K, Rehage J, Distl O. Mapping quantitative trait Loci for left-sided displacement of the abomasum in German Holstein dairy cows. J Dairy Sci 2009; 91:4383-92. [PMID: 18946144 DOI: 10.3168/jds.2008-1260] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [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
A whole-genome scan using an affected paternal half-sib design was utilized to detect quantitative trait loci (QTL) for left-sided displaced abomasum (LDA) in German Holsteins. A total of 360 animals from 14 paternal half-sib families were genotyped, for a total of 306 polymorphic microsatellites. For a whole-genome scan, 221 markers were equally distributed over all 29 bovine autosomes, with an average distance of 13.7 cM. For fine-mapping, a total of 85 additional microsatellites were used. We identified genome-wide significant QTL on Bos taurus autosome (BTA) 1 (54.6 to 58.3 cM) and on BTA3 (5.9 cM). Furthermore, 3 chromosome-wide significant QTL were located on bovine chromosomes 21, 23, and 24. In addition, we found 11 QTL that cosegregated in grandsire families but that were not significant in the across-family analysis. These QTL were located on BTA5, 6, 10, 12, 15, 16, 17, 19, 23, and 26. This study is the first report on QTL for LDA and is a first step toward identifying single nucleotide polymorphisms for LDA-QTL.
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Affiliation(s)
- S Mömke
- Institute for Animal Breeding and Genetics, University for Veterinary Medicine Hannover, 30559 Hannover, Germany
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Klein M, Zur D, Menzel D, Schoenes J, Doll K, Röder J, Reinert F. Evidence for itineracy in the anticipated Kondo insulator FeSi: a quantitative determination of the band renormalization. Phys Rev Lett 2008; 101:046406. [PMID: 18764349 DOI: 10.1103/physrevlett.101.046406] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2008] [Indexed: 05/26/2023]
Abstract
A comparison of high-resolution, angle-resolved photoemission spectroscopy (ARPES) data with ab initio band-structure calculations by density functional theory for the anticipated Kondo insulator FeSi shows that the experimental dispersions can quantitatively be described by an itinerant behavior provided that an appropriate self-energy correction is included, whose real part describes the band renormalization due to interactions of the Fe 3d electrons. The imaginary part of the self-energy, on the other hand, determines the linewidth of the quasiparticle peaks in the ARPES data. We use a model self-energy which consistently describes both the renormalized single-particle dispersion and the energy-dependent linewidth of the Fe 3d bands. These results are clear evidence that FeSi is an itinerant semiconductor whose properties can be explained without a local Kondo-like interaction.
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Affiliation(s)
- M Klein
- Universität Würzburg, Experimentelle Physik II, Am Hubland, D-97074 Würzburg, Germany
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Nitzschke A, Doll K. Tetanus bei einer Färse. Tierarztl Prax Ausg G Grosstiere Nutztiere 2008. [DOI: 10.1055/s-0037-1621444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Zusammenfassung
Gegenstand und Ziel: Beschrieben werden die klinische Symptomatik, die Therapie und der Krankheitsverlauf bei einem an Tetanus erkrankten Rind. Material und Methoden: Eine 19 Monate alte Färse der Rasse Deutsche Holsteins“ wurde wegen verminderter Futteraufnahme und Pansentympanie in die Klinik eingeliefert. Die Befunde der Eingangsuntersuchung sprachen für Tetanus: steifer Gang, leicht abduzierte Gliedmaßen, steif gestellte Ohren, Vorfall des dritten Augenlids, Strabismus divergens, Pansentympanie, harte Bauchdecke. Auffälligster Laborbefund war eine metabolische Alkalose (BE +12,0 mmol/l) mit leichter Hypokaliämie (K+ 2,9 mmol/l). Eine mögliche Eintrittspforte für die Erreger war nicht erkennbar. Ergebnisse: Zur Beseitigung der Pansentympanie und zur Eingabe von Flüssigkeit und Nährstoffen wurde eine temporäre Pansenfistel angelegt. Das Tier wurde 7 Tage lang mit Procain- Penicillin behandelt (einmal täglich 50000 IE/kg KM s. c.) und erhielt zur Verminderung der Muskelspasmen Xylazin (in den ersten 10 Tagen alle 4 Stunden, danach bis zum 24. Tag alle 6 Stunden jeweils 0,11 mg/kg KM s. c.). Am 30. Tag nach Behandlungsbeginn konnte die Färse geheilt entlassen werden. Schlussfolgerung: Pansentympanie stellt bei Rindern mit Tetanus ein häufiges Symptom dar. Insofern ist diese Erkrankung differenzialdiagnostisch als Ursache einer solchen Störung mit in Betracht zu ziehen. Klinische Relevanz: Selbst bei mäßig ausgeprägter Tetanussymptomatik und erfolgreichem Ansprechen auf die Therapie muss mit einer Krankheitsdauer von etwa 4 Wochen gerechnet werden. In Anbetracht des hohen Behandlungsaufwandes kommt daher ein Therapieversuch im Wesentlichen nur bei wertvolleren Rindern infrage.
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Pravettoni D, Doll K, Hummel M, Cavallone E, Morandi N, Belloli AG. Glucose tolerance test during abomaso-duodenal electromyography in three cows operated for left displaced abomasum. Dtsch Tierarztl Wochenschr 2007; 114:58-63. [PMID: 17341021] [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: 05/14/2023]
Abstract
The objective of the study was to analyze glucose metabolism and abomasal myoelectrical activity during an intravenous glucose tolerance test in cows operated for LDA. Three dairy cows, at the onset of lactation, suffering from left displaced abomasum were selected from the animals presented at the clinic. During surgical therapy, one pair of electrodes was placed in the smooth muscle of the abomasal body, the pars pylorica and the duodenum respectively. The animals were subjected to electromyography on five occasions during hospital admittance (Days 1, 2, 3, 5 and 7 post-operative); their insulin, glucagon, glucose, beta-hydroxybutyrate and NEFA levels were then measured. Two days after surgery, the animals were subjected to an intravenous glucose load (300 g glucose in 30 min) during abomaso-duodenal electromyography. The findings indicate that the three animals had glucose metabolism disorders during hospitalization. The abomaso-duodenal myoelectric activity of Cows 1 and 3 was lower than in Cow 2. During the glucose load, the analysis of hormones and metabolites showed that there were different degrees of reactivity and that myoelectric activity differed in the 3 cows. The results of the study suggest that despite the surgical reposition of the abomasum, disorders of abomasal motility persist in different degrees in cows operated for LDA and could be influenced by glucose administrations.
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Affiliation(s)
- D Pravettoni
- Ospedale Veterinario Grandi Animali, Clinica dei Ruminanti e del Suino, Università degli Studi di Milano, Italy.
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Abstract
The structure and cohesive energy of crystalline urea have been investigated at the ab initio level of calculation. The performance of different Hamiltonians in dealing with a hydrogen-bonded molecular crystal as crystalline urea is assessed. Detailed calculations carried out by adopting both HF and some of the most popular DFT methods in solid-state chemistry are reported. Local, gradient-corrected, and hybrid functionals have been adopted: SVWN, PW91, PBE, B3LYP, and PBE0. First, a 6-31G(d,p) basis set has been adopted, and then the basis set dependence of computed results has been investigated at the B3LYP level. All calculations were carried out by using a development version of the periodic ab initio code CRYSTAL06, which allows full optimization of lattice parameters and atomic coordinates. With the 6-31G(d,p) basis set, structural features are well reproduced by hybrid methods and GGA. LDA gives lattice parameters and hydrogen-bond distances that are too small relative to experiment, while at the HF level the opposite trend is observed. Results show that hybrid methods are more accurate than HF and both LDA and GGA functionals, with a trend in the computed properties similar to that of hydrogen-bonded molecular complexes. When BSSE and ZPE are taken into account, all methods, except LDA, give computed cohesive energies that are underestimated with respect to the experimental sublimation enthalpy. Dispersion energy, not properly taken into account by DFT methods, plays a crucial role. Such a deficiency also affects dramatically the computed crystalline structure, especially when large basis sets are adopted. We show that this is an artifact due to the BSSE. Indeed, with small basis sets the BSSE gives an extra-binding that compensates for the missing dispersion forces, thus yielding structures in fortuitous agreement with experiment.
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Affiliation(s)
- B Civalleri
- Dipartimento di Chimica IFM and NIS Centre of Excellence, Università di Torino, Via P. Giuria 7, 10125 Torino, Italy.
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Doll K, Shogren R, Holser R, Willett J, Swift G. Letters in Organic Chemistry (Polymerization of L-Aspartic Acid to Polysuccinimide and Copoly(Succinimide-Aspartate) in Supercritical Carbon Dioxide). LETT ORG CHEM 2005. [DOI: 10.2174/157017805774717553] [Citation(s) in RCA: 5] [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: 11/22/2022]
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Doll K, Riepl H, Dirksen G. [Pathophysiological significance of steatorrhea as well as of hydroxystearic acids in the feces of calves with diarrhea]. Dtsch Tierarztl Wochenschr 2004; 111:22-8. [PMID: 14983751] [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: 04/29/2023]
Abstract
UNLABELLED The objective of this study was to determine the digestibility of milk lipids in calves with diarrhoea, the pathophysiological effects of fat intake on the course of the disease and the conversion of malabsorbed longchain fatty acids to secretory effective hydroxy fatty acids by the intestinal flora. ANIMALS 32 male calves of the breed "Deutsches Fleckvieh" with spontaneous occurring diarrhoea, age 3-14 days. Reference group: 6 clinically healthy calves of the same age group. Feed: whole milk, daily ration corresponding to 10% of the BM, divided into 3 meals; supplementary oral rehydration solution as required. METHODS Quantitative collection of the faeces excreted over a period of at least 72 hours, determination of fatty acids and glycerides, identification and quantification of hydroxystearic acids in the faeces by gas chromatography; calculation of the apparent digestibility of the milk lipids. RESULTS The apparent digestibility of the milk lipids was in part considerably reduced in direct relation (r = 0.8) to the severity of the diarrhoea. In the case of daily fecal outputs of over 50 g/kg BM (watery diarrhoea), the apparent fat digestibility was reduced below 50%. Even so, the apparent digestibility correlated positively with the milk intake (r = 0.5). The fat excretion in the patients showed an average of 1.4 g/kg BM/24 h and was thus nearly nine times higher in comparison to the reference group (0.16 g/kg BM/24 h). In the case of severe diarrhoea, fat excretion rates of over 2 (up to max. 5.8) g/kg BM in 24 hours were recorded. However, in the main (approx. 70%) it was not glycerides but nonesterified fatty acids. A part of the longchain fatty acids were converted to hydroxy fatty acids by the intestinal flora. It was possible to quantify alpha-, 10(9)- and 12-hydroxystearic acids individually in the faeces of both healthy calves and those with diarrhoea. However, the total concentration of hydroxystearic acids in the faces of 26 out of 32 patients was considerably under the secretory effective concentration of 2 mmol/kg (mean = 1.5 mmol/kg), the other six lay between 2.9 and 11.6 mmol/kg. Only a weakly positive correlation (r = 0.23 or 0.24) existed between the amount of milk intake and the fecal concentration resp. excretion of hydroxystearic acids. CONCLUSIONS There was no evidence that the consumption of milk lipids influenced the diarrhoea negatively. In individual cases, it could not be completely excluded that fluid and electrolyte absorption was affected by hydroxystearic acids produced in the intestine, but the quantitative effects of this process are of minor significance in comparison to other diarrhoea inducing factors.
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Affiliation(s)
- K Doll
- Klinik für Wiederkäuer und Schweine (Innere Medizin und Chirurgie), Justus-Liebig-Universität Giessen.
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Doll K. [Clinical picture and differential diagnosis of foot and mouth disease in cattle]. Dtsch Tierarztl Wochenschr 2001; 108:494-8. [PMID: 11822162] [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: 04/17/2023]
Abstract
Foot-and-mouth disease (FMD) in cattle is characterized by the formation of vesicles and erosions in the mouth, teats and feet. Despite extremely high morbidity, mortality in adults is usually very low, however up to 50% of calves dies due to cardiac involvement or secondary infections. This paper describes the signs of FMD in cattle as well as those of other diseases which causes similar lesions in this species.
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Affiliation(s)
- K Doll
- Klinik für Wiederkäuer und Schweine (Innere Medizin und Chirurgie) der Justus-Liebig-Universität Giessen
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Doll K, Hartung J. [Main point publication. Foot-and-mouth disease]. Dtsch Tierarztl Wochenschr 2001; 108:483. [PMID: 11822160] [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: 02/23/2023]
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Abstract
Risk factors for congenital umbilical hernias were investigated in German Fleckvieh calves up for sale at livestock markets. Data from 53,105 calves were collected from 77 livestock auctions in 1996 and 1997. The overall incidence of congenital umbilical hernia was 1.8%. A significant influence on incidence was exerted by the sex of the calf, the occurrence of multiple births, the market place/market date, the sire and the sire line. The proportion of Red Holstein blood in the calf, the dam's lactation number, gestation length, 305 day milk performance and the herd milk level were not significant factors. Herdmate averages for calves differed significantly in their incidence. Heritability estimates on the liability scale for congenital umbilical hernia were about 0.4 and progeny groups of sires at risk for congenital umbilical hernia were in the range 0.1% to 14.2%. The segregation pattern could not be explained either by an autosomal recessive or by an autosomal dominant monogenic model. It seems likely that more than one gene locus is involved in the underlying genetic mechanism. Breeders should be aware of the genetic implications of congenital umbilical hernias.
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Affiliation(s)
- R Herrmann
- Institute of Animal Breeding and Genetics, School of Veterinary Medicine Hannover, Bünteweg 17p, 30559 Hannover, Germany
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Affiliation(s)
- K. Doll
- Institut fur Mathematische Physik, Tu Braunschweig, Mendelssohnstrasse 3, D-38106 Braunschweig, Germany
| | - G. Zwicknagl
- Institut fur Mathematische Physik, Tu Braunschweig, Mendelssohnstrasse 3, D-38106 Braunschweig, Germany
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Herrmann R, Utz J, Rosenberger E, Wanke R, Doll K, Distl O. [Occurrence and economic importance of congenital hernia in German Fleckvich calves]. Berl Munch Tierarztl Wochenschr 2001; 114:22-9. [PMID: 11225493] [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: 02/19/2023]
Abstract
The frequency of congenital hernia was investigated in German Fleckvieh calves being driven up for sale on livestock markets for breeding and fattening calves in Miesbach and Traunstein. Data were collected on 77 livestock auctions in the years 1996 and 1997. Altogether 53,105 calves were examined and 1.8% of these calves showed a congenital umbilical hernia. The incidence of umbilical hernia was significantly influenced by the sex of the calf, the occurrence of multiple births, the market place/market date, the sire and the sire line. Red Holstein blood proportion, lactation number, duration of pregnancy and 305 day milk performance were not of significant importance. Herd milk level did not influence the incidence of congenital umbilical hernia, however, herdmate averages for calves differed significantly in their incidence. The average difference of the market price between male calves affected by congenital umbilical hernia and not affected male calves amounted to 75 DM, in female calves, however, only to 38 DM. The risk, that a congenital umbilical hernia is not closing within an age of 15 months, depends on the width of the hernial opening in the newborn calf. An opening of 4 cm and more has only a healing chance of 50% and less. However, negative effects on fattening and carcass traits could be not found. The genetic influence on congenital umbilical hernia was obvious. The analyses indicated that the incidence of congenital umbilical hernia observed could not be explained by one autosomal recessive gene locus, but it seemed much more likely that more than one gene locus is involved or a mixed multifactorial monogenic mode of inheritance may be the underlying genetic mechanism. Breeders should be aware of the implications of congenital hernias and thus, congenital hernia should get more attention in the selection process of young sires.
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Affiliation(s)
- R Herrmann
- Institut für Tierzucht und Vererbungsforschung, Tierärztliche Hochschule Hannover
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Doll K, Riepl H, Eichhorn W, Dirksen G. [Bile acid concentrations in serum, bile and feces of healthy calves and calves with diarrhea]. Dtsch Tierarztl Wochenschr 1999; 106:35-40. [PMID: 10028759] [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: 02/10/2023]
Abstract
On 32 calves (age 3 to 14 days) with spontaneously occurring diarrhoea, the following investigations were carried out: Regular examination of serum bile acid concentrations, collection of the entire faeces with determination of bile acid concentrations, as well as microbiological examinations. Six clinically healthy calves served as control group. In addition, bile acids in bile were determined in 16 other calves of the same age group and in 6 beef bulls. There was no significant influence of daytime or feed intake on serum bile acid concentration in diarrhoeic or healthy calves. Possibly due to the low concentrations of bile acids in the bile of young calves (4.8 +/- 3.7 mmol/l, compared to 57 +/- 13 mmol/l in the bulls), the concentrations in faeces were also rather low (control group 623 +/- 92, calves with diarrhoea 318 +/- 277, after diarrhoea. 794 +/- 935 mumol/kg). Most of it was cholic acid, whereas only traces of desoxycholic acid were found. In spite of the comparatively low concentrations of fecal bile acids, the diarrhoeic calves excreted larger amounts of bile acids than the healthy calves (12.7 +/- 13.5 vs. 1.4 +/- 0.8 mumol/kg), but this was independent of the type of enteropathogen or pathogen combinations which were detected. There were no indications for a direct influence of the diarrhoea by bile acids. However, through enteral bile acid losses, profuse diarrhoea lasting several days can cause a reduction in the total bile acid pool.
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Affiliation(s)
- K Doll
- Klinik für Wiederkäuer und Schweine, Justus-Liebig-Universität Giessen
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Doll K, Klee W, Dirksen G. [Cecal intussusception in calves]. Tierarztl Prax Ausg G Grosstiere Nutztiere 1998; 26:247-53. [PMID: 9810601] [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: 02/09/2023]
Abstract
Among the patients admitted to the II. Medical Animal Clinic of the University of Munich from 1986 through 1994, there were 51 calves at an age of up to three months with intussusceptions in the caecal region. The following forms were observed: caecocaecal (n = 12), caecocolic (n = 22), ileocaecocolic (n = 6), ileocaecal (n = 8), and jejunoileocolic (n = 3). In 40 cases, the intussusception occurred in the course of diarrheal disease. The most important signs were scant faeces, that often contained blood and/or mucus, and the finding of a hard viscus upon abdominal palpation. Colic was observed in 27% of patients. In 18 cases, surgical intervention was not attempted because of the advanced stage of the disease or severe accompanying disease. From the remaining 33 calves, eight were cured. The others were either destroyed or died because of extensive peritonitis or other diseases. This report is to draw attention to the fact that (caecal) intussusception should be considered in diarrheal calves when faecal output decreases suddenly, and the general state deteriorates.
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Affiliation(s)
- K Doll
- II. Medizinischen Tierklinik, Ludwig-Maximilians-Universität München
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Strie R, Doll K, Pöttmann B, Scholz H. [Effect of various factors on the results of lung function tests using multifrequent impulse oscillometry in calves and young cattle]. Dtsch Tierarztl Wochenschr 1997; 104:286-90. [PMID: 9324453] [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: 02/05/2023]
Abstract
The applicability of impulse oscillometry (IOS) under clinical and field conditions was tested on 31 calves and 27 young bulls over a period from 3 to 5 months, respectively. Based on the obtained 492 test results (the average of four measurements), lung function criteria resistance and reactance, measured at frequencies of 5 to 15 Hz, showed to be diagnostically relevant. In healthy calves aged 4 to 12 weeks, resistance values lay between 0.22 to 0.36 kPa/(l/s) irrespective of frequency. Reactance values were in the range of -0.014 to 0.055 kPa/(l/s) at 5 Hz, but increased with growing frequency. Within the investigated groups no correlation could be established between factors age or body mass of the animals and resistance. Increasing age, however, led to a considerable increase in reactance. Alterations of the upper airway system were coupled with an increase in resistance values while reactance remained constant. Diagnostic evaluation of individual results relating to this category was hampered by the high interindividual test value variance of 25 to 31% between healthy animals. Diseases of the peripheral respiratory system, however, were clearly characterised by a significant decrease in reactance, as well as a negative frequency dependence of resistance. It is concluded that this method at lung function testing provides a sensitive tool for detecting and recording lung function disorders in young cattle.
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Affiliation(s)
- R Strie
- Klinik für Rinderkrankheiten, Tierärztlichen Hochschule Hannover
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Dirksen G, Doll K, Einhellig J, Seitz A, Rademacher G, Breitner W, Klee W. [Abomasal ulcers in calves: clinical investigations and experiences]. Tierarztl Prax 1997; 25:318-28. [PMID: 9312890] [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: 02/05/2023]
Abstract
Observations and experiences as well as results of clinical investigations in 364 calves with clinically apparent abomasal ulcers (bleeding 28, deep 37, perforating 299) are communicated. The anamnestic data, evaluated systematically, allow to conclude, that influences of the feeding regime, in particular faults during the early weaning period, play an important role in the multifactorial etiology. Furthermore, symptoms, diagnosis and differential diagnosis as well as treatment and prevention are described. The various localizations (and ways) of perforating abomasal ulcers are demonstrated by schematic representations and by the respective findings at operation or at necropsy.
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Affiliation(s)
- G Dirksen
- II. Medizinischen Tierklinik, Universität München
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Doll K, Dolg M, Stoll H. Correlation effects in MgO and CaO: Cohesive energies and lattice constants. Phys Rev B Condens Matter 1996; 54:13529-13535. [PMID: 9985261 DOI: 10.1103/physrevb.54.13529] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Abstract
A hitherto unknown skeletal muscle disorder is described in six Braunvieh x Brown Swiss calves. The animals showed rapidly progressing muscular weakness and became recumbent within 2 weeks of birth. Histological examination of skeletal muscle revealed a marked variation in muscle fibre size, internally placed nuclei, segmental loss of cross-striation with disorganization of myofibrils, and accumulation of nemaline rods. The most distinctive histological finding was intracytoplasmic, homogeneous, mostly crescent-shaped areas at the periphery of numerous muscle fibres. Electron microscopically, accumulations of tightly packed, parallel filamentous structures, about 20 nm in diameter, were detected in these areas. Enzyme histochemistry showed that all muscle fibre types were affected. Vimentin and dystrophin immunohistochemistry revealed normal antigen distribution within connective tissue components and at the periphery of each muscle fibre, respectively. The lesions could be readily distinguished from other neurological and neuromuscular disorders previously described in Braunvieh x Brown Swiss or American Brown Swiss Cattle. The disease appears to be a novel congenital myopathy in this breed, and a hereditary aetiology is suspected.
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Affiliation(s)
- A Hafner
- Department of General Pathology and Neuropathology, Ludwig-Maximilians-University, Munich, Germany
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Strumberg D, Harstrick A, Doll K, Hoffmann B, Seeber S. Bendamustine hydrochloride activity against doxorubicin-resistant human breast carcinoma cell lines. Anticancer Drugs 1996; 7:415-21. [PMID: 8826610 DOI: 10.1097/00001813-199606000-00007] [Citation(s) in RCA: 119] [Impact Index Per Article: 4.3] [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: 02/02/2023]
Abstract
The cytotoxic activity of bendamustine hydrochloride was evaluated against human ovarian and breast carcinoma cell lines including cell lines resistant to cisplatin and doxorubicin in vitro. The relative degree of resistance to bendamustine hydrochloride was lower in all cell lines compared with cyclophosphamide, melphalan and BCNU, suggesting only incomplete cross-resistance. Furthermore lower levels of resistance were also observed in all breast cancer cell lines when bendamustine hydrochloride was compared with cisplatin. Bendamustine hydrochloride also presents good activity in cell line MCF 7 AD, which is approximately 80-fold resistant to doxorubicin compared with MCF 7. Basic glutathione levels and activity of glutathione-S-transferase showed no correlation to the IC50 values for bendamustine hydrochloride in the cell lines. When given at equitoxic concentrations, bendamustine hydrochloride consistently induced more DNA double-strand breaks than melphalan, cyclophosphamide or BCNU. In addition, removal of DNA double-strand breaks induced by bendamustine hydrochloride was relatively slow with the majority of DNA double-strand breaks still being detectable after 24 h. These findings indicate differences in the interaction between bendamustine hydrochloride and DNA, and may explain the lack of complete cross-resistance between bendamustine hydrochloride and the other alkylating agents.
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Affiliation(s)
- D Strumberg
- Department of Internal Medicine (Cancer Research), West German Cancer Center, University of Essen, Germany
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Doll K, Dolg M, Fulde P, Stoll H. Correlation effects in ionic crystals: The cohesive energy of MgO. Phys Rev B Condens Matter 1995; 52:4842-4848. [PMID: 9981667 DOI: 10.1103/physrevb.52.4842] [Citation(s) in RCA: 52] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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