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"Sargent, John A."
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Fashioned by Sargent
Fashioned by Sargent explores the complicated relationship of painting and dress through reproductions of portraits and other works by Sargent, alongside costumes of the period - including garments actually worn by his sitters. Essays illuminate topics such as portraits and performance, gender expression, the New Woman, and the pull of history and the excitement of new ideas.
Book
The Texas Regional Psychiatry Minority Mentor Network: A Regional Effort To Increase Psychiatry’s Workforce Diversity
[...]two junior faculty members were promoted to the rank of associate professor. [...]three faculty members were appointed to leadership positions within academic centers, spanning from residency training director, director of diversity and cultural-competence education, and department chair. Barriers identified by mentees and mentors included 1) failed communication attempts via electronic mail for data collection and notification of events; 2) sparse funding for educational and social activities, and no funding for salary support; 3) decreased proximity of the institutions inside and outside the Houston area and community partners; 4) limited time availability for participation; and 5) difficulties with the coordination of events.
Journal Article
Whither goest Kt/V?
Whither goest Kt/V? Uremia is characterized by gross contamination of body water with a wide spectrum of retained solutes normally excreted by the kidney. The rationale for dialysis therapy is that these retained solutes have concentration-dependent toxicity, which can be ameliorated through removal by dialysis. Apart from the well-established clinical consequences of abnormalities in fluid, electrolyte, acid base metabolism, and retained β2-microglobulin (β2m), there is very little understanding of solute-specific uremic toxicity. Evidence is reviewed to demonstrate the following: (1) Many aspects of the uremic syndrome are controlled by adequate dialysis of low molecular weight solutes. (2) Urea can serve as a generic molecule to quantitate the fractional clearance of body water by dialysis (Kt/V) of retained low molecular weight solutes. (3) Urea has no concentration-dependent toxicity, and the generation rate of putative toxic low molecular weight solutes is not proportional to urea generation. The major clinical consequences and controversies stemming from these interrelationships are reviewed. Kinetic approaches to determine Kt/V dose equivalency between intermittent and continuous dialysis therapy are reviewed. We conclude that Kt/V can and will be generalized to describe the kinetics of other solutes such as β2m as our knowledge of uremic toxicity grows, and hence, it is predicted that it will goeth and goeth and goeth.
Journal Article
Cell Wall Metabolism in Developing Strawberry Fruits
Cell wall metabolism was studied in strawberry receptacles (Fragaria ananassa, Duchesne) of known age in relation to petal fall (PF). Polysaccharide and protein composition, incorporation of [14C]glucose and [14C]proline by excised tissue, and the fate of 14CO2 fixed by young, attached fruits were followed in relation to cell division, cell expansion, fine structure, and ethylene synthesis. Cell division continued for about 7 d after PF although vacuolation of cells was already beginning at PF and the subsequent cell expansion was logarithmic. There was an associated logarithmic increase in sugar content per cell and a decreasing rate of ethylene production per unit fresh weight. During cell expansion radioactivity from [14C]glucose was incorporated into fractions identified as starch and soluble polyuronide and into glucose and galactose residues in the cell wall. Radioactivity from [14C]proline was also incorporated into the cell wall, but only 10 per cent of this activity was found in hydroxyproline. Correspondingly wall protein contained a low proportion of hydroxyproline residues. The proportion of radioactivity from 14CO2 fixed by fruitlets remained constant in most sugar residues in the cell wall. The proportion of radioactivity in galactose fell, indicating turnover of these residues. Between 21 and 28 d after PF receptacles became red and softened but there was no change in the rate of ethylene production. Cell expansion continued for at least 28 d. Tubular proliferation of the tonoplast and hydration of middle lamella and wall matrix material had begun 7–14 d after PF but became extreme during ripening. Associated with the hydration of the wall, over 70 per cent of the polyuronide in the wall became freely soluble, and arabinose and galactose residues lost from the wall appeared in soluble fractions. There was no increase in total polysaccharide during ripening and incorporation of [14C]glucose into polysaccharides ceased, although protein increased and incorporation of [14C]proline into wall protein continued.
Journal Article
THE EFFECT OF SOME GROWTH REGULATORS ON THE VASCULAR SYSTEM OF LEMMA MINOR
Summary When TIBA is added to the culture solution in which fronds of Lernna minor are growing, the vascular system of the fronds becomes more elaborate. The amount of elaboration increases with concentration up to a maximum, beyond which no further increase is obtained. TIBA must be present at an early primordial stage to be effective, and sections of pri‐mordia showed that in the presence of TIBA a greater percentage of meristematic cells becomes procambial. IAA and NAA alone cause only a slight increase in amount of vascular tissue, but added with TIBA they modify the response to TIBA in a way which bears a complex relationship to their concentration. Pre‐treatment of the fronds with IAA does not alter their response to the mixtures of IAA and TIBA. It is concluded that TIBA is not acting as an anti‐auxin, but that an unknown inhibitor of vascular tissue may be present in the fronds which is counteracted by TIBA. Other halogenated benzoic acids have similar effects. It was reported in a previous paper (Wangermann and Lacey, 1953) that the vascular system of fronds of L. minor, which is normally very simple, becomes much more elaborate when 2,3,5‐tri‐iodobenzoic acid (TIBA) is added to the culture solution, and that this effect of TIBA is modified by simultaneous addition of indole‐acetic acid (IAA). These effects have been investigated further in an attempt to gain some insight into the way in which the normal pattern is determined.
Journal Article
Cryo-preservation of roots for scanning electron microscopy
Fully hydrated roots can be examined in the scanning electron microscope after cryo-preservation. Shrinkage associated with dehydration by freeze-drying or critical point drying, to which root hairs and secreted mucigel are particularly vulnerable, is avoided.
Journal Article
Herbicide-Induced Microbial Invasion of Plant Roots
Although herbicides are designed to have no effects on the crops in which they are used, crop damage can occur, especially when overdoses are used or if chemicals are applied at an inappropriate time. Usually the resulting damage is recognized as foliar symptoms but roots may be severely affected as well.
Journal Article
STORY OF JOHN SARGENT BRINGS MASTER PAINTER OF U.S. BACK TO LIFE AGAIN
The story of America is by no means written alone in the cold form of dollars and still more dollars. We have produced notable figures in the world of literature and art as well.
Newspaper Article
Ethanol during Hemodialysis for Ethylene Glycol Poisoning
To the Editor:
In the January 1 issue, Peterson et al.
1
present important information concerning the therapy for ethylene glycol poisoning. Although the general therapeutic strategy outlined is appropriate for this type of intoxication, the recommendations describe only the authors' study and are potentially misleading if applied to all such cases.
Specifically, the recommendation of a dose of 237 mg of ethanol per kilogram of body weight per hour during hemodialysis fails to take into account mass-transfer dynamics during this type of treatment. Although this level of ethanol administration may have been appropriate in this particular study with a Dow . . .
Journal Article
The Effect of Some Growth Regulators on the Vascular System of Lemna minor
When TIBA is added to the culture solution in which fronds of Lemna minor are growing, the vascular system of the fronds becomes more elaborate. The amount of elaboration increases with concentration up to a maximum, beyond which no further increase is obtained. TIBA must be present at an early primordial stage to be effective, and sections of primordia showed that in the presence of TIBA a greater percentage of meristematic cells becomes procambial. IAA and NAA alone cause only a slight increase in amount of vascular tissue, but added with TIBA they modify the response to TIBA in a way which bears a complex relationship to their concentration. Pre-treatment of the fronds with IAA does not alter their response to the mixtures of IAA and TIBA. It is concluded that TIBA is not acting as an anti-auxin, but that an unknown inhibitor of vascular tissue may be present in the fronds which is counteracted by TIBA. Other halogenated benzoic acids have similar effects.
Journal Article