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Biomedical subjects

W L Webb

Publications and source records attributed to W L Webb.

26 records · Page 2Linked to original sources
PubMed1979

Hypochondriasis: difficulties in diagnosis and management.

The hypochondriacal patient presents numerous frustrations for the physician. The typical hypochondriac is a middle-aged person dominated by a preoccupation with bodily symptoms. Bereavement, serious life failures, and severe blows to self-esteem put patients at high risk for somatization. Hypochondrisis has been cited as a symptom of masked depression, early paranoid schizophrenia, and dementia and/or delirium. A careful diagnostic work-up with attention to any correctable psychiatric illness sets the stage for regularly scheduled, long-term supportive therapy.

Counseling↗
PubMed1977

Seasonal allocation of photoassimilated carbon in douglas fir seedlings.

The uptake of CO(2) by Douglas fir (Pseudotsuga menziesii [Mirb.] Franco) seedlings and the allocation of photoassimilated carbon among five vegetative tissues were closely related to seedling phenology. In May, newly flushing needles required 5.2% day(-1) of photoassimilated carbon relative to needle tissue carbon. As these needles matured, this carbon requirement declined to 1.95% day(-1) in August, to 0.94% day(-1) in November, and to 0.76% day(-1) in January. Other tissues of Douglas fir seedlings required different amounts of photoassimilated carbon for growth and metabolism. These data provide a strong link between daily CO(2) uptake and the regulation of carbon allocation by seasonal phenology.The data, obtained with long term labeling with (14)CO(2), were analyzed with a compartment model representing the dynamic flux of carbon through the seedlings.

Journal Article↗
PubMed1975

Dynamics of photoassimilated carbon in douglas fir seedlings.

The relations between CO(2) uptake, translocation, and carbon accumulation in several vegetative components of Douglas fir seedlings (Pseudotsuga menziesii [Mirb.] Franco) have been quantified using (14)CO(2). Seedlings were exposed to a constant specific radioactivity of (14)CO(2) and a repeating daily pattern of temperature and light for 4 consecutive days. Results of (14)C analysis, which indicated a transitory pattern of photoassimilated carbon movement, were extrapolated to a "steady rate" using a compartment analysis. Accumulation rates of photoassimilated carbon, relative to tissue carbon, were new needles, 0.94%/day, old needles, 1.14%/day, new shoots 0.38%/day, stem, 0.16%/day, and roots, 0.50%/day. Therefore, the source of carbon, the needles, is also the strongest sink.

Journal Article↗