Showing papers by "University of New Mexico published in 1975"
TL;DR: Pregnancy may be allowed to continue under close supervision in cases of uncertainty of duration of gestation, in gravidas carrying small babies, in young primigravidas, and in multigravida in whom placentofetal function tests are normal.
204 citations
TL;DR: The prolongation of half-life in the non-smokers was very significant (p), and the half- life following an I.V. aminophylline bolus was 3.6 ± 1.5 hours.
147 citations
TL;DR: The conclusion that the interspecific competitive alpha is zero does not lead to the conclusion that inter specific competition is unimportant in the system, and were there not a continual threat of interspecific competition, the habitat specializations would soon disappear.
Abstract: The populations of two coexisting species of Dipodomys (Heteromyidae, Rodentia) were manipulated on 10, large, unenclosed, trapping grids. These manipulations revealed that, although many kangaroo rats are established residents in an area, a large number are transient individuals who quickly occupy vacated habitats. On plots from which residents had been removed, transients settled at rates of up to 5% of carrying capacity per day. These immigrants were invariably of the same species that was removed, indicating a strong element of intraspecific competition with little or no evidence of competition between the species.
145 citations
TL;DR: For example, in this article, the presence of kyanite is the first reported occurrence of this eclogite mineral in diamond inclusions; however, no mixing of the two suites has been found in a single diamond, with one possible exception.
Abstract: Twenty-nine inclusion-bearing diamonds, mostly from Africa, were studied in order to determine the mineral assemblages and compositions of the inclusions. Those interpreted as syngenetic with diamond (e.g. garnet, pyroxene, olivine) frequently have crystal faces related to the diamond rather than to their own structure; they are termed xenohedral. Ten diamonds contain minerals comparable to those in the garnet lherzolite assemblage; these are pyrope-knorringite garnet (0.7–9.2% Cr2O3), diopside-orthopyroxene intergrowths (interpreted as subcalcic diopside exsolved into diopside and orthopyroxene, (En86–94), enstatite (En92–93), olivine (Fo92–93; 0.03–0.15% Cr2O3) and chromite. Fifteen diamonds have minerals comparable to those in eclogites enclosed in kimberlites; these are pyrope-grossular-almandine garnet, omphacite (2.7–10.7% Al2O3, 1.4–5.8% Na2O, 0.04–0.87% K2O), kyanite, rutile, magnetite (probably intergrown with sulfide) and phlogopite. Minerals of uncertain origin, associated with the eclogitic inclusion assemblages, are sanidine, a polymorph of silica, and filamentous material rich in SiO2, Al2O3 and K2O. Epigenetic minerals are muscovite, amphibole (hornblende, actinolite), sulfide (pentlandite, chalcopyrite) and altered kyanite. In the garnet lherzolite suite subcalcic diopside assemblages may have formed in the sheared lherzolite zone at 1200–1400°C, and reequilibrated in the granular lherzolite zone at 1000°C, of the upper mantle. The eclogite suite assemblage has a compositional range similar to that found in diamondidferous and non-diamondiferous eclogite xenoliths from kimberlites. K-bearing omphacite requires experimental study. The presence of kyanite is the first reported occurrence of this eclogite mineral in diamond. Magnetite, intergrown with sulfide, is part of the eclogite assemblage. No mixing of the two suites has been found in a single diamond, with one possible exception.
144 citations
TL;DR: In this article, an exact elastic-plastic solution for the stresses in an infinite sheet having a circular hole subject to pressure is obtained on the basis of J2 deformation theory together with a modified Ramberg-Osgood law.
Abstract: An exact elastic-plastic solution for the stresses in an infinite sheet having a circular hole subject to pressure is obtained on the basis of J2 deformation theory together with a modified Ramberg-Osgood law. The sheet is orthotropic but isotropic in its plane. The results are assessed on the basis of Budiansky's criterion for the acceptability of J2 deformation theory. By using exact elastic-plastic stresses, the function connecting the pressure at the hole with the radial enlargement is obtained. Upon release of the pressure, residual stresses around the hole are produced.
117 citations
TL;DR: The principal findings are that the major pelvic ganglion of the male rat is composed of cholinergic and adrenergicganglion cells as well as small intensely fluorescent (SIF) cells.
Abstract: To further evaluate the role of autonomic ganglia in the regulation of pelvic visceral activity, the neural elements in the major pelvic ganglion of the male rat have been studied with histochemical and electron microscopic techniques. The principal findings are that the ganglion is composed of cholinergic and adrenergic ganglion cells as well as small intensely fluorescent (SIF) cells. Polarity in the ganglion is indicated by clustering of small ganglion cells which stain intensely for acetylcholinesterase (AChE) along the pelvic nerve while larger cells, with weak to moderate AChE activity, collect near small branches of the hypogastric nerve. Some cholinergic ganglion cells are enclosed by a plexus of adrenergic terminals. SIF cells appear to be in contact with both cholinergic and adrenergic cells, although many of the fluorescent beads around adrenergic neurons may be short dendrites of ganglion cells, rather than processes of SIF cells. Two types of SIF cells may be distinguished on the basis of size and morphology of their granulated vesicles. Afferent synapses of the cholinergic type were common on SIF cells of the large granule and small granule type. Portions of SIF cells with large granules occur within the capsule of ganglion cells. Contacts seen here were interpreted as efferent synapses from SIF cells to the dendrites of ganglion cells.
109 citations
TL;DR: An outbreak of pulmonary infection due to Serratia marcescens was traced to the use of the flexible fiberbronchoscope and a sterilization procedure utilizing povidine iodine (Betadine solution) subsequently rendered the bronchoscope aseptic.
91 citations
TL;DR: The common nodular habit of anhydrite in modern Persian Gulf marginal sediments has played a key role in the interpretation of older evaporite deposits as paleosabkhas.
Abstract: The common nodular habit of anhydrite, similar to the nodular anhydrite in modern Persian Gulf marginal sediments, has played a key role in the interpretation of older evaporite deposits as paleosabkhas. Also, laminated carbonate and sulfate sediments with dark organic interlaminae or films have served as criteria for peritidal or intertidal sedimentation under algal-mat control. Not all laminated sediments originated as algal mats in shallow or intertidal environments, and the nodular habit of anhydrite is a normal diagenetic fabric not indicative exclusively of the subaerial sabkha environment.
78 citations
TL;DR: Progress is outlined being made in the use of preoperative irradiation as an adjunct to surgery in the management of cancer of the rectum and rectosigmoid, with some data indicating that longevity may be increased when surgery is supplemented with pre operative irradiation.
Abstract: This paper outlines progress being made in the use of preoperative irradiation as an adjunct to surgery in the management of cancer of the rectum and rectosigmoid. Studies have shown that the normal rectal mucosa has a marked capacity for repair during fractionated radiation treatments. There is evidence that the use of preoperative irradiation reduces the number of involved lymph nodes found at operation. No marked interference with the ability of the surgeon to perform an abdominal perineal resection has been observed. In patients who subsequently undergo such a procedure, there are some data indicating that longevity may be increased when surgery is supplemented with preoperative irradiation, although further comparative studies are needed. Two studies are now under way by national clinical investigative groups.
76 citations
Journal Article•
TL;DR: In this article, the structural stability of the metamict glass relative to that of the crystalline pre-metamict material is an important consideration in predicting whether a substance will occur in the met amict state.
Abstract: Graham and Thornber (1974b) have proposed a mechanism for metamictization in complex niobium-tantalum oxides in which complex compositions, rather than radiation damage, are the primary requirement. This note reviews the literature in support of radiation damage as a necessary condition for metamictization and suggests that the structural stability of the metamict "glass" relative to that of the crystalline pre-metamict material is an important consideration in predicting whether a substance will occur in the metamict state.
68 citations
TL;DR: The results of this study suggest that a sperm release system in the green sunfish extends from the preoptic area to the spinal cord passing through the hypothalamus, midbrain tegmentum and basal midbrain and medulla.
Abstract: Acute brain stimulation experiments were carried out in anesthetized male green sunfish, Lepomis cyanellus. Semen discharge was evoked consistently by low level electrical stimulation (100 muA or less) in the following areas: the preoptic region, dorsal hypothalamus, thalamus, midbrain tegmentum and the basolateral midbrain and medulla. Areas which were stimulated repeatedly at 100 muA and were always negative for sperm release included: the telencephalon with the exception of the preoptic region, the optic tectum, the cerebellum, the inferior lobe of the hypothalamus, the nucleus rotundus and the dorsal medulla. Removal of most of the optic tectum and cerebellum failed to block reponses evoked from the preoptic area; however, they were usually eliminated by transecting the rostral spinal cord. Electrical stimulation of an isolated 4 mm segment of spinal cord located at the third vertebral level resulted in sperm release, indicating that adequate mechanisms for semen discharge are present within the upper spinal cord. The results of this study suggest that a sperm release system in the green sunfish extends from the preoptic area to the spinal cord passing through the hypothalamus, midbrain tegmentum and basal midbrain and medulla.
TL;DR: It is suggested that hemangiosarcoma be considered in patients with: 1) splenomegaly without evidence of malignant lymphoma or leukemia, 2)splenomeGaly with microangiopathic hemolytic anemia, and 3) unexplained intraperitoneal hemorrhage.
Abstract: A 76-year-old man with spontaneous rupture of a hemangiosarcoma of the spleen, together with a review of 49 previously reported patients with splenic hemangiosarcoma are presented. Twenty-three were women and 27 were men. All but 3 were adults. Fifteen were 50–59 years of age. The symptomatology was nonspecific. Three patients developed microangiopathic hemolytic anemia. Spontaneous rupture occurred in 17 cases (34%). Metastases occurred in 42 cases; they were primarily hematogenous and most often in the liver. Lymph node involvement, however, was present in 13 cases. The prognosis of untreated splenic hemangiosarcoma is poor. Three of 25 patients survived a year or more after the initial onset of symptoms. Splenectomy before rupture is advisable, since 5 of 19 patients survived at least 1–5 years. It is suggested that hemangiosarcoma be considered in patients with: 1) splenomegaly without evidence of malignant lymphoma or leukemia, 2) splenomegaly with microangiopathic hemolytic anemia, and 3) unexplained intraperitoneal hemorrhage.
TL;DR: Potassium pyroantimonate has been employed in this study to localize calcium in the vascular smooth muscle of the thoracic aorta of the rabbit and some or all of these organelles may play a vital role in the contractionrelaxation cycle of vascular smooth Muscle.
Abstract: Potassium pyroantimonate has been employed in this study to localize calcium in the vascular smooth muscle of the thoracic aorta of the rabbit. The pyroantimonate ion precipitates sodium, magnesium and calcium. Incubation of theisolated thoracic aorta in a high potassium bathing medium which does not contain sodium, magnesium or calcium depletes the tissue of sodium. Addition of 10.8 mM CaC12 to the incubation medium results in well-localized depositions of reaction product, presumably that of calcium pyroantimonate, in mitochondria, sarcoplasmic reticulum, and at the plasma membrane. Some or all of these organelles may, therefore, play a vital role in the contraction-relaxation cycle of vascular smooth muscle.
TL;DR: Increased knowledge of the mechanics and hazards of peritoneal dialysis, close patient observation and meticulous attention to apparently small details, should decrease the number of complications and preserve the effectiveness of the procedure.
TL;DR: The effects of high frequency electrical stimulation of both diffusely projecting brain regions and regions of more restricted projection were studied on penicillin-induced cortical epileptiform focal activity in the cat, discussing the interaction between naturally occurring brain rhythms in sleep and arousal with the epileptic process.
TL;DR: Recent observations on HL-A antigens, complement, immunoglobulins, virus, and immunocomplexes suggest that the latter are prominent in CNS-SLE, but that an infectious agent may be etiologic in the genesis of SLE.
TL;DR: In this paper, the authors suggest that sex differences in the behavior of children exist but are not necessarily intensified under certain cultural conditions, and that certain elements of male and female differentiated behavior are exploited in the process of increasing sex differentiation.
Abstract: This paper suggests that sex differences in the behavior of children exist but are not necessarily intensified under certain cultural conditions. Under conditions of culture change to a sedentary economy, certain elements of male and female differentiated behavior are exploited in the process of increasing sex differentiation.
TL;DR: The importance of hypervelocity impacts as a geologic process is demonstrated by the example of the Bushveld Complex and the (nearby) Vredefort Ring as mentioned in this paper.
Abstract: The importance of hypervelocity impacts as a geologic process is demonstrated by the example of the Bushveld Complex and the (nearby) Vredefort Ring. Each is interpreted as the result of four simultaneous impacts modified by large-scale endogenic processes triggered by the impact event. The layered mafic sequence and the voluminous red granite associated with the complex are endogenic magmas, probably generated by pressure release accompanying crater excavation. Shock melting of older sedimentary rocks must have produced a layer of impact melt (the Rooiberg Felsite), the upper part of which was extruded over its originally chilled crust as a series of thick lava flows. Field evidence and radiometric age determinations indicate that the Bushveld Complex formed approximately 2000 billion years ago.
TL;DR: Antilymphocyte antibodies in SLE bind to normal lymphocytes and are not always associated with lymphocytotoxic activity, and influence the enumeration of B lymphocytes as determined by surface immunoglobulin.
Abstract: Antilymphocyte antibodies in SLE bind to normal lymphocytes and are not always associated with lymphocytotoxic activity. Detection of these antibodies on the surface of normal lymphocytes by immuno-fluorescent techniques is enhanced by short incubation periods, reduced temperature, and metabolic inhibition. The same effects occur in SLE blood and May-June influence the enumeration of B lymphocytes as determined by surface immunoglobulin. The percent of T lymphocytes forming sheep erythrocyte rosettes is not affected by these antibodies.
TL;DR: Isolation due in part to cultural factors, genetic drift, and special local or regional patterns of villages associations appear to be involved in the pattern of genetic variation.
Abstract: The present study reports an analysis of genetic differentiation among 14 Sardinian villages located mainly in the center of the island. Chi-square tests show significant genetic heterogeneity among villages, and analyses by F- and R- statistics indicate an essentially random pattern of differentiation for all alleles. Using the kinship methods of Morton, a matrix, R, with elements rij describing the correlations between the gene frequencies of villages i and j is obtained. Use of Malecot's formula relating the rij to the geographic distances between villages shows a rapid decline of kinship with increasing distance but reveals essentially no relationship for distances over 40 km. Rotation of a two-dimensional reduction of the kinship matrix to maximum congruence with the geographic distances indicates that about 25% of the genetic distances can be accounted for by the geographic location of the villages. Isolation due in part to cultural factors, genetic drift, and special local or regional patterns of villages associations appear to be involved in the pattern of genetic variation.
TL;DR: Evidence is consistent with the proposal that a given sterol carrier protein is a soluble constituent of a single microsomal enzyme or enzyme complex, and that it participates both as a carrier for the water-insoluble substrate and as an essential enzyme constituent facilitating catalysis.
TL;DR: In this article, the authors concluded that headache in systemic lupus erythematosus in the absence of neurologic symptoms or signs is no indication of central nervous system involvement by the process and that small vessel disease of the brain is not a cause of headache.
Abstract: SYNOPSIS
Seventy-two records of patient with systemic lupus erythematosus were reviewed retrospectively. Sixty-one fulfilled the criteria for the disease. Forty-six percent had clinical evidence of central nervous system involvement. The incidence of headache was compared in those with and without central nervous system lupus. No difference in the frequency of headache in the two groups were found and the incidence of hypertension, renal disease and steroid therapy was equally distributed among those with and without headache. A significantly higher incidence of hypertension was found in patients with central nervous system lupus erythematosus. We conclude that headache in systemic lupus erythematosus in the absence of neurologic symptoms or signs is no indication of central nervous system involvement by the process and that small vessel disease of the brain is not a cause of headache.
TL;DR: Studies involving cell fractionation, cell washing, and pH-dependent adsorptions indicate that cell-associated α-amylase and glucoamylases are localized primarily with the surface of the cells and only to a small extent with the intracellular region.
Abstract: As determined by enzyme levels and by differential rate of enzyme formation, the synthesis of α-amylase and glucoamylase by Clostridium acetobutylicum is under separate regulatory systems. Induction of α-amylase occurs when starch is the carbon source while induction of glucoamylase accompanies growth with glucose. Minimal production of both enzymes is associated with growth on fructose, and intermediate levels result from growth with maltose. While both α-amylase and glucoamylase are elaborated into the culture fluid during the logarithmic growth phase, 41-44% of total amylase and 22-33% of total glucoamylase remain associated with the bacterial cells. Studies involving cell fractionation, cell washing, and pH-dependent adsorptions indicate that cell-associated α-amylase and glucoamylase are localized primarily with the surface of the cells and only to a small extent with the intracellular region.
TL;DR: The kleptoparasitism of the prey of web-building spiders by scorpionflies of the genus Panorpa (Panorpidae) is reported, and a likely selective context for the evolution of this unusual feeding strategy in scorpion flies is considered.
Abstract: ONLY a few species of spiders and insects are known regularly to inhabit spider webs. Known associations involve predation or commensalism. Spiders of the family Mimetidae invade the webs of other spiders to devour the owner of the web. Small spiders of the genus Argyrodes (Theridiidae) are often seen in the webs of larger spiders, where they seem to consume only small insects ignored by the spiders that constructed the web; this relationship is thus commensalism and not parasitism2. The insect Ranzovius (Hemiptera: Miridae) seems to be a commensal in the webs of certain spiders3; however, R. fennahi may be predaceous on spider eggs4. The tropical hummingbird, Phaethornis superciliosus, has been observed feeding on insects trapped in webs of Nephila clavipes (Araneidae). The hummingbird–Nephila association may be parasitism because although only very small insects are taken by hummingbirds, they may remove a portion of the host's web for nest material5. I report here the kleptoparasitism of the prey of web-building spiders by scorpionflies of the genus Panorpa (Panorpidae), and I consider a likely selective context for the evolution of this unusual feeding strategy in scorpionflies. Field observations were conducted in south-eastern Michigan near Ann Arbor during 1971–74 (ref. 6).
TL;DR: Both species feed extensively in a group and overlap considerably in food selection, and both are conspicuously well adapted to man-modified habitats and regularly build nests on manmade structures.
Abstract: Although House Finches (Carpodacus mexicanus) and House Sparrows (Passer domesticus) are distinct taxonomically, they share several ecological and behavioral similarities. Both are gregarious and are semi-colonial nesters, defending only a small, variable territory surrounding the nest (Thompson 1960a, Summers-Smith 1963). Both species are conspicuously well adapted to man-modified habitats and regularly build nests on manmade structures. Further, numerous observers have reported interspecific conflict between the two species involving nest sites (Gilman 1908, Bergtold 1913, Evenden 1957, and Thompson 1960a). Both species feed extensively in a group and overlap considerably in food selection. The diet of the House Finch
TL;DR: In this paper, the authors determined the stress intensity factors at the root of a radial crack emanating from a circular hole in an infinite sheet, under uniform tension in the direction at an arbitrary inclination with angle β and uniform in-plane shear, respectively.
Abstract: The stress intensity factors are determined at the root of a radial crack emanating from a circular hole in an infinite sheet, under uniform tension in the direction at an arbitrary inclination with angle β and uniform in-plane shear, respectively. The stress analysis is carried out using the Muskhelishvili formulation and the conformal mapping. Numerical results of the stress intensity factors are obtained for varying crack length-to-hole radius ratio, L/R.
TL;DR: No single serum fraction isolated by ion exchange chromatography, gel filtration, or electrophoresis was identified as solely responsible for marrow growth retardation; however lipoprotein fractions including chylomicrons, LDL and HDL showed inhibiting activity in various sera.
Abstract: Whole sera and serum fractions from 24 patients with Felty's syndrome, 42 patients with systemic lupus erythematosus (SLE), and 48 patients with rheumatoid arthritis (RA), as well as 30 patients with miscellaneous acute and chronic disease states, were studied for their effect on numbers of mouse bone marrow colonies grown on soft agar in the presence of human colony stimulating factor. Significant early retardation of mouse bone marrow colony counts was recorded in 87.5 percent of Felty's sera, 43 percent of SLE sera, and 12.5 percent of sera from patients with uncomplicated RA. Forty percent of 30 other control patients with acute or chronic inflammatory diseases also showed this activity. No diminution was noted with any of 40 normal control sera. Degree of marrow colony retardation could be directly correlated to amounts of test serum added. No single serum fraction isolated by ion exchange chromatography, gel filtration, or electrophoresis was identified as solely responsible for marrow growth retardation; however lipoprotein fractions including chylomicrons, LDL and HDL showed inhibiting activity in various sera.