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Frobose HL, Fruge ED, Tokach MD, Hansen EL, DeRouchey JM, Dritz SS, Goodband RD, Nelssen JL. The effects of deoxynivalenol-contaminated corn dried distillers grains with solubles in nursery pig diets and potential for mitigation by commercially available feed additives. J Anim Sci 2016; 93:1074-88. [PMID: 26020884 DOI: 10.2527/jas.2013-6883] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Four experiments were conducted to investigate the effects of deoxynivalenol (DON) from naturally contaminated dried distillers grains with solubles (DDGS) and the efficacy of feed additives in nursery pig diets. In Exp. 1, 180 pigs (10.3 ± 0.2 kg BW) were fed 1 of 5 diets for 21 d. Diets were 1) Positive Control (PC; < 0.5 mg/kg DON), 2) Negative Control (NC; 4 mg/kg DON), 3) NC + 0.10% Biofix (Biomin Inc., Herzogenburg, Austria), 4) NC + 0.15% Cel-can (VAST Inc., Mason City, IA) and 0.50% bentonite clay, and 5) NC + 0.25% Defusion Plus (Cargill Animal Nutrition, Minneapolis, MN). Pigs fed the NC diet had poorer ( < 0.01) ADG than those fed the PC. Pigs fed Defusion Plus had improved ( < 0.03) ADG over those fed NC, whereas pigs fed Biofix or Cel-can with bentonite clay had reduced ADG ( < 0.01) compared with those fed PC. In Exp. 2, 340 pigs (11.7 ± 0.1 kg BW) were fed 1 of 8 diets for 21 d. Diets were 1) PC (< 0.5 mg/kg DON), 2) Low NC (1.5 mg/kg DON), 3) Low NC + 0.15% Biofix, 4) Low NC + 0.30% Biofix, 5) High NC (3.0 mg/kg DON), 6) High NC + 0.30% Biofix, 7) High NC + 0.45% Biofix, and 8) Diet 7 with 5% added water. Increasing the DON level reduced (linear; < 0.05) ADG, ADFI, and pig BW, and Biofix did not improve performance. In Exp. 3, 1,008 pigs (12.5 ± 0.3 kg BW) were fed 6 treatments for 24 d. Diets were 1) PC ( < 0.5 mg/kg DON), 2) NC (3 mg/kg DON), 3) NC + 0.25% Defusion, 4) NC + 0.50% Defusion, 5) Diet 3 with supplemental nutrients, and 6) Diet 5, pelleted. Pigs fed the NC had decreased ( < 0.01) ADG and ADFI, but adding Defusion improved (linear; < 0.04) ADG and ADFI over pigs fed NC. Pelleting improved ( < 0.01) both ADG and G:F, resulting in ADG above PC pigs. In Exp. 4, 980 pigs (12.0 ± 0.3 kg BW) were fed 1 of 7 diets in a 28-d trial in a 2 × 3 + 1 factorial arrangement. The 7 treatments were based on 3 diets fed in meal or pellet form: 1) PC (< 0.5 mg/kg DON), 2) NC (3 mg/kg DON), and 3) NC + 0.25% Defusion. Treatment 7 was Diet 3 with supplemental nutrients in pellet form. No interactions were observed between pelleting and Defusion. Pigs fed the NC had decreased ( < 0.01) ADG and ADFI, and pelleting improved ( < 0.01) ADG to PC levels, driven by improved ( < 0.01) G:F. Adding nutrients or Defusion had no effect. Overall, these studies show that Defusion and pelleting can help overcome some of the negative effects of DON, whereas other feed additives and additional nutrients do not.
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Hansen EL, Hvistendahl GM, Rawashdeh YFH, Olsen LH. Promising long-term outcome of bladder autoaugmentation in children with neurogenic bladder dysfunction. J Urol 2013; 190:1869-75. [PMID: 23707450 DOI: 10.1016/j.juro.2013.05.035] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/15/2013] [Indexed: 01/16/2023]
Abstract
PURPOSE We evaluated the long-term outcome of bladder autoaugmentation in children with neurogenic bladder dysfunction. MATERIALS AND METHODS Data were compiled from the records of 25 children with a median age of 9.3 years (range 0.9 to 14.2) who underwent detrusor myotomy between 1992 and 2008. All patients were diagnosed with small bladder capacity, low compliance and high end filling pressures, and were unresponsive to clean intermittent catheterization and anticholinergics. RESULTS Median followup was 6.8 years (range 0.1 to 15.6). Median postoperative bladder capacity was unchanged or decreased to 95 ml (range 25 to 274) during the first 3 months compared to a median preoperative capacity of 103 ml (14 to 250). At 5 months postoperatively median bladder capacity increased significantly to 176 ml (range 70 to 420, p<0.01). This increase remained significant during the rest of followup. Median bladder compliance doubled after 1 year to 10 ml/cm H2O (range 1 to 31, p<0.05) compared to the preoperative level, and further increased to 17 ml/cm H2O (5 to 55) at 5 years (p<0.05). Median maximal detrusor pressure was 43 cm H2O (range 8 to 140) preoperatively. This value decreased significantly postoperatively (p<0.01) and at final followup it was 26 cm H2O (range 6 to 97). Kidney function developed normally in all patients except 1 with persistent uremia. Reflux was alleviated in 7 of 9 cases. Of the patients 18 became continent on clean intermittent catheterization. CONCLUSIONS Bladder autoaugmentation in children with neurogenic bladder dysfunction offers, after a transient decrease in bladder capacity, a long lasting increase in capacity and compliance, while the end filling pressure decreases.
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Affiliation(s)
- Eva Lund Hansen
- Department of Urology, Aarhus University Hospital Skejby, Aarhus, Denmark; Institute of Clinical Medicine, Aarhus University Hospital Skejby, Aarhus, Denmark
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Hansen EL, Hemmen H, Fonseca DM, Coutant C, Knudsen KD, Plivelic TS, Bonn D, Fossum JO. Swelling transition of a clay induced by heating. Sci Rep 2012; 2:618. [PMID: 22943004 PMCID: PMC3431542 DOI: 10.1038/srep00618] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2012] [Accepted: 08/15/2012] [Indexed: 12/02/2022] Open
Abstract
Clays are of paramount importance for soil stability, but also in applications ranging from oil recovery to composites and hydrogels. Generically, clays are divided into two subclasses: macroscopically swelling, ‘active’ clays that have the capacity for taking up large amounts of water to form stable gels, and ‘passive’ or non-swelling clays; the former stabilize soils whereas the latter are known to lead to landslides. However, it has been unclear so far what mechanisms underlie clay swelling. Here, we report the first observation of a temperature-induced transition from a passive to an active, swelling clay. We propose a simple description of the swelling transition; while net attractive interactions are dominant at low temperatures so that the clay particles remain attached to each other in stacks, at higher temperatures it is energetically favourable for the clay to swell due to the entropy that is gained by counterions which are liberated during swelling.
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Affiliation(s)
- E L Hansen
- Department of Physics, Norwegian University of Science and Technology – NTNU, Trondheim, Norway.
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Ringdal NI, Fonseca DM, Hansen EL, Hemmen H, Fossum JO. Nematic textures in colloidal dispersions of Na-fluorohectorite synthetic clay. Phys Rev E Stat Nonlin Soft Matter Phys 2010; 81:041702. [PMID: 20481735 DOI: 10.1103/physreve.81.041702] [Citation(s) in RCA: 5] [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: 11/18/2009] [Indexed: 05/22/2023]
Abstract
We have studied stable strata of gravity-induced phase separation in suspensions of synthetic Na-fluorohectorite clay in saline solutions. We have observed how the strata depend on clay concentration as well as on salt content. The mass distribution and density variation at the isotropic-nematic interface indicate that existing models and assumptions in existing simulations are able to relatively well account for the observed behavior. We suggest that discrepancies could be due to the high polydispersity and the irregular shape of our Na-fluorohectorite particles, as well as diffusive double-layer effects, which could result in a competition between nematic ordering and gelation. The dependence on ionic strength displays three main regimes irrespective of clay concentration. At low ionic strength (approximately 0.1-5 mM NaCl), the Debye screening length is longer than the van der Waals force range. In this regime, the particles repel each other electrostatically and entropy-driven Onsager-type nematic ordering may occur, although gelation effects could also play a role. For ionic strengths above about 5 mM, we believe that the van der Waals force comes into play and that particles attract each other locally according to the classical Derjaguin, Landau, Verwey, and Overbeek (DLVO) model of colloid interactions, resulting in a small-domain regime of attractive nematiclike ordering. In the third regime, for ionic strengths above approximately 10 mM, the clay particles aggregate into larger assemblies, due to the dominant van der Waals force, and the observed birefringency is reduced. We have studied the nematic phase in detail between crossed polarizers and have found textures showing nematic Schlieren patterns. By rotating the polarizers as well as the samples, we have observed examples of disclinations of strengths -1, -1/2, and +1.
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Affiliation(s)
- N I Ringdal
- Department of Physics, Norwegian University of Science and Technology, Hoegskoleringen 5, N-7491 Trondheim, Norway
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Rasmussen JO, Christensen M, Svendsen JM, Skausig O, Hansen EL, Nielsen KA. CYP2D6 gene test in psychiatric patients and healthy volunteers. Scandinavian Journal of Clinical and Laboratory Investigation 2009; 66:129-36. [PMID: 16537246 DOI: 10.1080/00365510500469702] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
BACKGROUND Antipsychotic drug therapy meets difficulties in predicting response in psychiatric patients. The medical treatment of these patients may be improved significantly by systematic phamacogenetic diagnosis identifying the drug metabolic capacities of each patient. Genetic polymorphisms in the coding sequence for the drug metabolizing cytochrome P450 enzyme CYP2D6 represent a pharmacogenetic target. METHODS A cohort (n = 225) representing psychiatric patients seen during an 18-month trial period was included in the project after the subjects accepted a blood sample being taken to analyse their CYP2D6 allelic composition. To investigate any putative difference in allele frequencies among the psychiatric patients compared to earlier publications on allele frequencies in Caucasian populations, another cohort (n = 122) of local healthy volunteers was likewise included. RESULTS Allelic frequencies in the psychiatric patients and healthy volunteers were indistinguishable. Alleles *1 and *2 encoding for normal enzyme activity and alleles *3, *4, *5, *6, *13/*16 representing non-active forms were found as well as alleles *9, *10, *41 encoding for enzymes with decreased activity. Furthermore, examples of the previously described duplications of *1 and *2, which result in enhanced enzyme activity, were also identified. CONCLUSION A systematic CYP2D6 gene test of hospitalized psychiatric patients revealed the identification of pharmacogenetically relevant alleles affecting capacity to metabolize antipsychotics. The frequencies of phenotypes in affected patients were 8.4 % intermediate metabolizers (IMs), 8.4 % poor metabolizers (PMs) and 3.1 % ultrafast metabolizers (UMs), whereas 52.4 % were extensive metabolizers (EMs) and 27.6 % heterozygous EMs.
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Affiliation(s)
- J O Rasmussen
- Danish Epilepsy Centre, Laboratory, Dianalund, Denmark
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Abstract
Although it is known that the use of oral contraceptives (OC's) can induce glucuronide conjugating enzymes, currently no data exists as to the potential that the elimination of the glucuronidated drug lamotrigine (LTG) is increased by OC's. We present seven cases in whom the plasma levels of LTG were significantly decreased by OC's (mean 49%, range 41-64%). The interaction was of clinical relevance in most of the patients who either experienced increased seizure frequency/recurrence of seizures after OC's had been added, or adverse effects following withdrawal of OC's.
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Affiliation(s)
- A Sabers
- Danish Epilepsy Hospital, Dianalund, DK-4293 1 Kolonivej, Denmark.
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Pedersen TM, Hansen EL, Kane J, Rein T, Helquist P, Norrby PO, Tanner D. Enantioconvergent synthesis by sequential asymmetric Horner-Wadsworth-Emmons and palladium-catalyzed allylic substitution reactions. J Am Chem Soc 2001; 123:9738-42. [PMID: 11583534 DOI: 10.1021/ja005809q] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A new method for enantioconvergent synthesis has been developed. The strategy relies on the combination of an asymmetric Horner-Wadsworth-Emmons (HWE) reaction and a palladium-catalyzed allylic substitution. Different alpha-oxygen-substituted, racemic aldehydes were initially transformed by asymmetric HWE reactions into mixtures of two major alpha,beta-unsaturated esters, possessing opposite configurations at their allylic stereocenters as well as opposite alkene geometry. Subsequently, these isomeric mixtures of alkenes could be subjected to palladium-catalyzed allylic substitution reactions with carbon, nitrogen, and oxygen nucleophiles. In this latter step, the respective (E) and (Z) alkene substrate isomers were observed to react with opposite stereospecificity: the (E) alkene reacted with retention and the (Z) alkene with inversion of stereochemistry with respect to both the allylic stereocenter and the alkene geometry. Thus, a single gamma-substituted ester was obtained as the overall product, in high isomeric purity. The method was applied to a synthesis of a subunit of the iejimalides, a group of cytotoxic macrolides.
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Affiliation(s)
- T M Pedersen
- Department of Chemistry, Technical University of Denmark, Building 201, Kemitorvet, DK-2800 Kgs. Lyngby, Denmark
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Andersen LS, Hansen EL, Knudsen JB, Wester JU, Hansen GV, Hansen TM. Prospectively measured red cell folate levels in methotrexate treated patients with rheumatoid arthritis: relation to withdrawal and side effects. J Rheumatol 1997; 24:830-7. [PMID: 9150068] [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: 02/04/2023]
Abstract
OBJECTIVE To investigate whether red cell folate (RCF) levels relate to side effects, withdrawals, or disease activity during treatment with the folic acid antagonist methotrexate (MTX) for rheumatoid arthritis (RA). METHODS Side effects were recorded monthly, RCF levels were measured by lactoglobulin binding radioassays, and 8 variables for disease activity were measured in a placebo controlled double blind trial of 28 weeks' duration comparing efficacy of MTX (n = 23) and D-penicillamine (n = 23). RESULTS From Week 20 RCF levels decreased only in the MTX group (p < 0.02), and 5 MTX treated patients withdrew due to side effects. Withdrawals had lower RCF values at Weeks 0 and 9 compared to the remaining patients (p < 0.05). Folate deficiency evolved in 5 patients; 2 of these developed cytopenia. Aberrations in the scheduled dosage increase were related to lower pretreatment values of RCF (p = 0.007). Side effect scores were inversely correlated to RCF values at Weeks 0, 9, and 28 (p < 0.05). RCF levels measured concomitantly with liver enzyme elevation were lower than the remaining values (p < 0.001). When side effects were reported, 96% of concomitantly measured RCF values were below 800 nmol/l. RCF values at entry did not correlate to improvement in any variable for disease activity, or a graded overall improvement. CONCLUSION RCF levels decrease during MTX treatment and relate to side effects, withdrawals, liver enzyme elevations and aberrant MTX dosage increase, but not to the therapeutic effect. RCF above 800 nmol/l protects against side effects.
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Affiliation(s)
- L S Andersen
- Department of Rheumatology, King Christian X Hospital, Gråsten, Denmark
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Hansen EL, Jødal E. [Natural birth control using the Billing's method]. Sygeplejersken 1997; 97:42. [PMID: 9464115] [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: 02/06/2023]
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Hansen GV, Nielsen L, Kluger E, Thysen M, Emmertsen H, Stengaard-Pedersen K, Hansen EL, Unger B, Andersen PW. Nutritional status of Danish rheumatoid arthritis patients and effects of a diet adjusted in energy intake, fish-meal, and antioxidants. Scand J Rheumatol 1996; 25:325-30. [PMID: 8921927 DOI: 10.3109/03009749609104066] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.3] [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: 02/03/2023]
Abstract
This study deals with the nutritional status of Danish RA patients and address the question of whether or not RA can be directly influenced by dietary manipulation. In a prospective, single-blinded study of 6 months duration, 109 patients with active RA were randomly assigned to either treatment with or without a specialized diet. The energy consumption was adjusted to normal standards of body weights and the intake of fish meals and antioxidants were increased. A daily food diary was completed by the patients, and the total intake of 47 different food-elements was calculated. Nutritional status together with disease activity parameters were recorded. At baseline, the Danish RA-patients had neglected food habits with a significant reduction in intake of total energy, of D-vitamin and of E-vitamin. A very low intake of n-3 fatty acids was also found. During the study, 28 of the 109 patients dropped out, introducing a confounding effect on the overall result. In the remaining 81, those following the diet demonstrated a significant improvement in the duration of morning stiffness, number of swollen joints, pain status, and reduced cost of medicine, while doctors global assessment, laboratory data, X-ray, and daily activities were unaltered. In conclusion, dietary analysis and appropriate, corrective advice should be offered to Danish RA patients.
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Affiliation(s)
- G V Hansen
- Department of Rheumatology, King Christian X's Hospital, Graasten, Denmark
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Elm T, Hansen EL. Simultaneous determination of lofepramine and desipramine by a high-performance liquid chromatographic method used for therapeutic drug monitoring. J Chromatogr B Biomed Appl 1995; 665:355-61. [PMID: 7795815 DOI: 10.1016/0378-4347(94)00540-l] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
A simple reversed-phase HPLC method with ultraviolet detection for the simultaneous measurement of lofepramine and desipramine is described. Only a single alkaline extraction was used, with clomipramine as internal standard. The column used was a Supelco PCN column, and the mobile phase was acetonitrile-methanol-0.015 M phosphate buffer (120:35:100, v/v). The average recoveries were 78.8% for desipramine and 103.8% for lofepramine, and limits of quantitation were 25 and 5 nmol/l, respectively. The inter-assay C.V.s for lofepramine and desipramine were 6.0 and 7.6%, respectively. The method is specific and has excellent accuracy, and has been used for therapeutic drug monitoring of patients with depressions treated with lofepramine. Mean steady-state plasma concentrations found for lofepramine and desipramine were 8.5 +/- 6.1 and 123.6 +/- 120.6 nmol/l, respectively. It is concluded that lofepramine in itself has an antidepressive effect.
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Affiliation(s)
- T Elm
- Kolonien Filadelfia, Laboratory, Dianalund, Denmark
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Alving J, Dylmer H, Gram L, Hansen EL, Jensen JP, Sindrup E. [The first centre for epilepsy in Denmark--the Epilepsy Hospital in Dianalund]. Ugeskr Laeger 1988; 150:2376-8. [PMID: 3206616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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Bergqvist Y, Larsson K, Hansen EL. Gas chromatographic determination with flash methylation of palmitic acid in amniotic fluid in prediction of fetal lung maturity. Clin Chim Acta 1980; 102:67-74. [PMID: 6893019 DOI: 10.1016/0009-8981(80)90434-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [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
A new method for determination of palmitic acid in amniotic fluid was developed. The dipalmitoyl lecithin was hydrolysed, and after extraction the palmitic acid was flash methylated in the injector of the gas chromatograph. The between batch coefficient of variation was 6.0% at 40 and 70 mumol/l of palmitic acid concentrations in 500 microliters amniotic fluid. The accuracy of the method was demonstrated by linearity, recovery and correlation studies. The correlation coefficient was 0.98 between the new and bortrifluoride methylating method. The concentrations of lecithin and palmitic acid in amniotic fluid showed a correlation coefficient of 0.97. If the concentration of palmitic acid falls below 80 mumol/l respiration distress syndrome is likely. The new method was simple and easy to carry out and could be adjusted for haemoglobin contamination of the amniotic fluid. It was concluded that the determination of palmitic acid in amniotic fluid was a reliable method for the assessment of fetal lung maturity that could replace the determination of lecithin concentration.
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Christensen MS, Kristensen HS, Hansen EL. Artificial hyperventilation during 21 years in three cases of complete respiratory paralysis. Acta Med Scand 1975; 198:409-13. [PMID: 812338 DOI: 10.1111/j.0954-6820.1975.tb19564.x] [Citation(s) in RCA: 3] [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: 12/24/2022]
Abstract
Three patients with paralytic poliomyelitis have been ventilated via tracheostomy with uncuffed silver cannula for 21 years, with high tidal volumes of atmospheric air (8.3, 7.2, and 5.4 ml/kg b.wt.), at a frequency of 20, passive expiration, and without periodic hyperinflation. No pulmonary complications were seen during the whole of this period. The total compliance was significantly decreased. The pulmonary physiological shunt relative to the total pulmonary blood flow (Qs/Qt) was slightly increased. PaO2 was nevertheless normal, probably due to a high alveolar PO2 caused by the hyperventilation. The physiological dead space realtive to the tidal volume (VD/VT) was within the noraml range, but VD was high in one case. Two of the patients disclosed an extremely low CO2 production and a PaCO2 averaging 12 mmHg, with small fluctuations during a 24-hour study. This profound respiratory alkalosis was only partly compensated in the arterial blood (pH: 7.54 and 7.50), suggesting a new state of acid-base equilibrium. The cerebrospinal fluid lactate was significantly increased to about 4 mmol/l, but the patients revealed no signs of impaired cerebral function. A reduction of the degree of hypocapnia by the use of a mechanical dead space is recommended.
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Russell JT, Hansen EL, Thorn NA. Calcium and stimulus-secretion coupling in the neurohypophysis. III. Ca2+ ionophore (A-23187)-induced release of vasopressin from isolated rat neurophypophyses. Acta Endocrinol (Copenh) 1974; 77:443-50. [PMID: 4479069] [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: 01/10/2023]
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Hansen EL, Kristensen HS, Brodersen P, Paulson OB, Müllertz S, Jessen O. Acid-base pattern of cerebrospinal fluid and arterial blood in bacterial meningitis and in encephalitis. Acta Med Scand 1974; 196:431-7. [PMID: 4440521 DOI: 10.1111/j.0954-6820.1974.tb01035.x] [Citation(s) in RCA: 14] [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: 01/10/2023]
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Buecher EJ, Perez-Mendez G, Hansen EL, Yarwood E. Sulfhydryl compounds under controlled gas in culture of Schistosoma mansoni sporocysts. Proc Soc Exp Biol Med 1974; 146:1101-5. [PMID: 4420922 DOI: 10.3181/00379727-146-38253] [Citation(s) in RCA: 4] [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: 01/10/2023]
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Paulson OB, Brodersen P, Hansen EL, Kristensen HS. Regional cerebral blood flow, cerebral metabolic rate of oxygen, and cerebrospinal fluid acid-base variables in patients with acute meningitis and with acute encephalitis. Acta Med Scand 1974; 196:191-8. [PMID: 4422910 DOI: 10.1111/j.0954-6820.1974.tb00994.x] [Citation(s) in RCA: 54] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Buecher EJ, Yarwood E, Hansen EL. Effects of mitomycin C on sex of Aphelenchus avenae (Nematoda) in axenic culture. Proc Soc Exp Biol Med 1974; 146:299-301. [PMID: 4857113 DOI: 10.3181/00379727-146-38092] [Citation(s) in RCA: 3] [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: 01/12/2023]
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Hansen EL, Perez-Mendez G, Yarwood E, Buecher EJ. Second-generation daughter sporocysts of Schistosoma mansoni in axenic culture. J Parasitol 1974; 60:371-2. [PMID: 4821125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
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DiConza JJ, Hansen EL. Cultivation of Schistosoma mansoni daughter sporocysts in arthropod tissue cultures. J Parasitol 1973; 59:211-2. [PMID: 4687500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
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DiConza JJ, Hansen EL. Multiplication of transplanted Schistosoma mansoni daughter sporocysts. J Parasitol 1972; 58:181-2. [PMID: 5012517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
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Hansen EL, Perez-Mendez G, Buecher EJ. Glycogen as a supplement in media for axenic cultivation of nematodes. Proc Soc Exp Biol Med 1971; 137:1352-4. [PMID: 5138460 DOI: 10.3181/00379727-137-35786] [Citation(s) in RCA: 4] [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: 01/14/2023]
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Buecher EJ, Hansen EL. Mass culture of axenic nematods uising continuous aeration. J Nematol 1971; 3:199-200. [PMID: 19322369 PMCID: PMC2619865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023] Open
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Myers RF, Buecher EJ, Hansen EL. Oligidic Medium for Axenic Culture of Aphelenchoides sp. J Nematol 1971; 3:197-198. [PMID: 19322368 PMCID: PMC2619858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023] Open
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Buecher EJ, Hansen EL, Yarwood E. Cultivation of Caenorhabditis briggsae and Turbatrix aceti with Defined Proteins. J Nematol 1971; 3:89-90. [PMID: 19322347 PMCID: PMC2619838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023] Open
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Hansen EL, Perez-Mendez G. Large scale preparation of liver growth factor for cultivation of nematodes. Proc Soc Exp Biol Med 1970; 135:487-9. [PMID: 5480013 DOI: 10.3181/00379727-135-35080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Lower WR, Willett JD, Hansen EL. Selection for adaptation to increased temperatures in free-living nematodes. II. Some lipid differences in Panagrellus redivivus. Comp Biochem Physiol 1970; 34:473-9. [PMID: 5426571 DOI: 10.1016/0010-406x(70)90186-6] [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: 01/15/2023]
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Buecher EJ, Hansen EL, Myers RF. Continuous Axenic Culture of Aphelenchoides sp. J Nematol 1970; 2:189-190. [PMID: 19322295 PMCID: PMC2618725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023] Open
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Buecher EJ, Hansen EL, Gottfried T. A Nematode Growth Factor from Baker's Yeast. J Nematol 1970; 2:93-98. [PMID: 19322277 PMCID: PMC2618717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023] Open
Abstract
An extract prepared from commercially available yeast supported maturation of the free-living nematode Caenorhabditis briggsae. The extract can be used to supplement a chemically defined medium or, after a limited dialysis, as a complete medium. Several biologically active fractions were prepared; those containing larger amounts of ribonucleic acid (RNA) had greater biological activity, the most active being a pellet resuspended after centrifugation at 30,000 x g for 30 min. This fraction could be substituted for serum in a medium which supports the maturation of the animal parasites Trichinella spiralis and Hymenolepis nana. Addition of protamine sulfate decreased the RNA content, leaving inactive protein fractions which could be reactivated by specific treatments that caused protein precipitation. It is postulated that biological activity is associated with protein sedimented with ribosomes.
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Hansen EL, Buecher EJ. Biochemical approach to systematic studies with axenic nematodes. J Nematol 1970; 2:1-6. [PMID: 19322267 PMCID: PMC2618711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023] Open
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Buecher EJ, Perez-Mendez G, Hansen EL. The role of precipitation during activation treatments of growth factor for Caenorhabditis briggsae. Proc Soc Exp Biol Med 1969; 132:724-8. [PMID: 5355134 DOI: 10.3181/00379727-132-34297] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Hansen EL. Inhibition of flexion reflex by rewarding or aversive central stimulation. J Comp Physiol Psychol 1969; 69:65-8. [PMID: 5347368 DOI: 10.1037/h0027928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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44
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Buecher EJ, Hansen EL. Yeast extract as a supplement to chemically defined medium for axenic culture of Caenorhabditis briggsae. Experientia 1969; 25:656. [PMID: 5800143 DOI: 10.1007/bf01896577] [Citation(s) in RCA: 6] [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: 01/16/2023]
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Yarwood EA, Hansen EL. Dauer Larvae of Caenorhabditis briggsae in Axenic Culture. J Nematol 1969; 1:184-189. [PMID: 19325674 PMCID: PMC2617821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023] Open
Abstract
The free-living hermaphroditic nematode, Caenorhabditis briggsae, enters a dauer stage under certain conditions in axenic culture. Dauer larvae differ from directly-developing third-stage larvae in internal structure, size at time of second molt, morphology of second and third cuticles, separation zone of cuticular caps, and survival at 4 C and 37 C, temperatures fatal to other stages. Males, which occur rarely in liquid medium, may mature under conditions which cause most of the hermaphrodites to go into the dauer stage, resulting in a culture with increased male-to-hermaphrodite ratio.
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Solvsteen P, Hansen EL, Ebbesen I, Iversen M. [Effect of phenformin on the production of lactic acid during hypoxia and muscular work]. Ugeskr Laeger 1968; 130:812-5. [PMID: 4880856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Yarwood EA, Hansen EL. Axenic culture of Pelodera strongyloides Schneider. J Parasitol 1968; 54:133-6. [PMID: 5689168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
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