431 results match your criteria: "Macalester College; chatterjead@macalester.edu.[Affiliation]"
J Mol Spectrosc
July 1999
Department of Chemistry, Macalester College, 1600 Grand Avenue, St. Paul, Minnesota, 55105
We have made highly accurate measurements of the absorption spectrum of the 14NO and 15NO isotopomers of nitric oxide in the far-infrared. Pure rotational transitions up to J" = 3712 within the 2Pi1/2 and 2Pi3/2 spin components and several 2Pi3/2 <-- 2Pi1/2 fine-structure transitions were recorded within the ground vibrational state. A least-squares fit to these data combined with some lambda-doubling and rotational transitions measured by previous workers has resulted in accurate values for the rotational, fine, and hyperfine parameters of these two isotopomers.
View Article and Find Full Text PDFExp Clin Psychopharmacol
November 1998
Department of Psychology, Macalester College, St. Paul, Minnesota 55105, USA.
Rats orally self-administered ethanol when they could control dose size as follows: A lever press initiated a trial; a press on 1 lever increased the previous trial duration by 30% whereas a press on a 2nd lever decreased the previous trial duration by 30%. During a trial, rats could drink either water, 8%, or 16% (wt/vol) ethanol (ETOH) from a lick-sensitive fountain. Mean per session intake of 8% and 16% ETOH was 0.
View Article and Find Full Text PDFJ Mol Spectrosc
October 1998
Department of Chemistry, Macalester College, 1600 Grand Avenue, St. Paul, Minnesota, 55105
J Pineal Res
October 1997
Biology Department, Macalester College, St. Paul, Minnesota 55105, USA.
Melatonin was measured over 24 hr in the eyestalks of Uca pugilator by means of radioimmunoassay; crabs were acclimatized either to a LD 12:12 photoperiod or constant darkness. A significant peak occurred at 13.00 hr in the LD 12:12 crabs.
View Article and Find Full Text PDFJ Mol Spectrosc
October 1997
Department of Chemistry, Macalester College, 1600 Grand Avenue, St. Paul, Minnesota, 55105
Several rotational transitions of zinc hydride and deuteride within the v = 0 level of the X2Sigma+ state have been measured in both electron spin components over the ranges N" = 2 to 10 for ZnH and N" = 9 to 21 for ZnD. A least-squares fit to these data in combination with low-N microwave data measured by other workers has resulted in improved values of the rotational, fine, and hyperfine structure constants. The values of the proton hyperfine constants are discussed in the context of a molecular orbital analysis of zinc hydride.
View Article and Find Full Text PDFJ Law Med Ethics
September 2000
Macalester College, St. Paul, Minnesota, USA.
Author argues that, through disclosure of conflicts of interest and patient consent to these conflicts, MCOs can mitigate or even eliminate many conflicts of interest that arise with incentive plans or plan constraints.
View Article and Find Full Text PDFJ Pineal Res
March 1997
Biology Department, Macalester College, St. Paul, MN 55105, USA.
Melatonin was measured in a species of aerobic photosynthetic bacteria, Erythrobacter longus, grown in either constant light or constant dark. A radioimmunoassay was used to quantify melatonin levels and thin-layer chromatography to confirm the identity of melatonin immunoactivity. Melatonin levels were significantly higher (nearly 2.
View Article and Find Full Text PDFBrain Res
February 1997
Department of Psychology, Macalester College, St. Paul, MN 55105, USA.
We have previously demonstrated that illness-inducing agents (lipopolysaccharide (LPS)) and inflammatory agents (subcutaneous (s.c.) formalin) induce hyperalgesia by similar pathways.
View Article and Find Full Text PDFInorg Chem
May 1996
Department of Chemistry, Macalester College, St. Paul, Minnesota 55105.
An attempt to synthesize a complex between copper(I) cyanide and thioacetamide (ta) by a direct combination in aqueous solution, surprisingly, produced instead Cu(4)(S(2)O(3))(2)(ta)(10).ta (1), a complex lacking cyanide but including thiosulfate. We know of no precedent for the production of thiosulfate from an aqueous solution of ta.
View Article and Find Full Text PDFInorg Chem
May 1996
Departments of Chemistry, Macalester College, St. Paul, Minnesota 55105, and University of Minnesota, Minneapolis, Minnesota 55455.
The syntheses and crystal structures of the first cyanide, sulfur mixed ligand copper(I) complexes are reported. The first complex of the family was discovered when (CuCN)(3)(C(6)H(12)N(4))(2) (1) (C(6)H(12)N(4) = hexamethylenetetramine) was treated with aqueous thiourea. The sulfur ligands include thiourea (tu), 1,3-dimethyl-2-thiourea (dmtu), 1,3-diethyl-2-thiourea (detu), 1,1,3,3-tetramethyl-2-thiourea (tmtu), and 2-imidazolidinethione (N,N'-ethylenethiourea, etu).
View Article and Find Full Text PDFKennedy Inst Ethics J
June 1996
Macalester College, St. Paul, MN, USA.
The Centers for Disease Control and Prevention (CDC) has recommended that HIV testing be routinely offered to certain patients in hospitals with a high prevalence of HIV infection and on all pregnant women. The CDC does not, however, offer implementation level guidelines for obtaining informed consent. We provide a moral justification for requiring informed consent for HIV testing and propose guidelines for securing such consent.
View Article and Find Full Text PDFBrain Res
November 1994
Department of Psychology, Macalester College, St. Paul, MN.
A variety of experimental manipulations produce enhanced pain responsivity. Recent work has demonstrated that activation of N-methyl-D-aspartate (NMDA) receptors in the spinal cord can produce persistent enhancement of pain via production of nitric oxide and/or prostaglandins. To date, the behavioral paradigms used to study NMDA mediated hyperalgesia have all involved direct excitation of spinal cord dorsal horn neurons via activation of primary nociceptive afferents.
View Article and Find Full Text PDFBrain Res
June 1994
Department of Psychology, Macalester College, St. Paul, MN 55105.
Previous work has demonstrated that pain facilitation can occur following injection of subcutaneous irritants, such as formalin. Such studies have focused on apparent pain facilitation induced at the site of irritant injection. Changes in processing of incoming pain information have typically been assumed to result from activation of neurocircuitry intrinsic to the spinal cord.
View Article and Find Full Text PDFPain
February 1994
Department of Psychology, Macalester College, St. Paul, MN 55105 USA Department of Psychology, University of Colorado at Boulder, Boulder, CO 80309 USA.
It has been argued that pain functions to facilitate recovery from injury and/or illness by stimulating recuperative behaviors. If this is the case, then hyperalgesia might be expected to be part of the constellation of adaptations that occur during sickness. The present series of studies tested two agents that induce illness (lithium chloride and bacterial cell-wall endotoxin (lipopolysaccharide)) to determine their acute effects on pain responsivity in rats.
View Article and Find Full Text PDFBrain Res
January 1994
Department of Psychology, Macalester College, St. Paul, MN 55105.
The central nervous system contains circuitry that inhibits pain sensitivity (analgesia), as well as circuitry that opposes pain inhibition (anti-analgesia). Activation of analgesia systems and anti-analgesia systems can each be brought under environmental control using classical conditioning procedures. Analgesia can be produced by cues present before and during aversive events such as electric shock, while active inhibition of analgesia comes to be produced by cues never present immediately before or during shock and therefore signal safety.
View Article and Find Full Text PDFTransplantation
November 1993
Biology Department, Macalester College, St. Paul, Minnesota 55105.
These studies were designed to determine (1) if culture-isolated, neonatal rat islets are capable of inducing xenogeneic tolerance in mice and (2) whether this tolerance is species- or strain-specific. We attempted to induce xenogeneic tolerance by transplanting culture-isolated neonatal FSH islets to 26 diabetic C57B1/6 recipients. These animals received one injection of ALS at the time of transplant.
View Article and Find Full Text PDFJ Med Philos
June 1993
Macalester College, St. Paul, MN 55105.
We assume that a statute permitting physician assisted death has been passed. We note that the rationale for the passage of such a statute would be respect for individual autonomy, the avoidance of suffering and the possibility of death with dignity. We deal with two moral issues that will arise once such a law is passed.
View Article and Find Full Text PDFDiabetes
September 1992
Department of Biology, Macalester College, St. Paul, MN 55105.
We have previously shown that culture-isolated neonatal islets are able to survive both rejection and the recurrence of autoimmunity in the spontaneously diabetic BB/Wor rat. In trials designed to demonstrate the MHC restriction of the autoimmune response in this model, we discovered that neonatal islet grafts from diabetic BB rats appeared larger than grafts from nondiabetic controls. This study was undertaken to quantify the mass difference seen in this original study and to determine the characteristics of graft growth in more highly controlled trials.
View Article and Find Full Text PDFWest J Med
September 1992
Department of Anthropology, Macalester College, St Paul, MN.
Gypsies in the United States are not a healthy group. They have a high incidence of heart disease, diabetes mellitus, and hypertension. When they seek medical care, Gypsies often come into conflict with medical personnel who find their behavior confusing, demanding, and chaotic.
View Article and Find Full Text PDFTransplant Proc
April 1992
Department of Biology, Macalester College, St Paul, MN 55105.
Addict Behav
July 1992
Macalester College, University of Minnesota, Department of Psychology, St. Paul 55105.
A group of 35 alcoholics who indicated they had symptoms of phobia, panic, or both (the anxiety problem group) were compared to their matched controls who did not indicate having anxiety problems. Comparisons of relapse rates, reasons for relapse, and rates of emotional problems at six months posttreatment were made. Results showed that although relapse rates were similar between the two groups, significantly more anxious subjects reported relapsing to cope with depression and experiencing problems with nervousness, tension, and anger posttreatment.
View Article and Find Full Text PDFOecologia
March 1991
Department of Biology, Macalester College, 55105, Saint Paul, MN, USA.
The effects of fire and pocket gophers, Geomys bursarius, on the survivorship of Penstemon grandiflorus growing in an oak woodland in Minnesota were studied from 1986 to 1990. Plants growing in sparse vegetation experienced mortality rates twice that of plants growing in dense vegetation. This difference was due partly to pocket gophers whose earth moving activities reduce the density of vegetation and bury and kill individual Penstemon plants.
View Article and Find Full Text PDFAnn N Y Acad Sci
December 1991
Department of Biology, Macalester College, St. Paul, Minnesota 55105.
Transplant Proc
April 1990
Biology Department, Macalester College, St. Paul, MN 55105.