Sodium efflux from Chlorella pyrenoidosa.
Explore the source record for details and available documents.
Biological Transport↗
Biomedical subjects
J Barber
Publications and source records attributed to J Barber.
Energy transfer and its dependence on membrane properties.
With isolated chloroplasts variations in the degree of energy transfer between light-harvesting chlorophyll-protein complexes can be induced by changing the cation content of the suspending medium. The changes can be observed by measuring chlorophyll-fluorescence yields and lifetimes and are probably brought about by conformatial changes in the thylakoid membrane. Detailed studies of the properties of cation-induced changes in chlorophyll fluorescence indicated that the alterations in pigment organization are due to variations in the density of positive charges immediately adjacent to the surface of the thylakoid membrane, being in qualitative agreement with predictions based on the Gouy-Chapman theory of diffuse double layers. Possible mechanisms for the membrane structural changes controlling energy transfer are given.
Chlorophyll↗
Abnormal diurnal weight gain among long-term patients with schizophrenic disorders.
We found diurnal weight gain to be abnormal among 65 long-term patients with schizophrenic disorders. Patients were weighed at 7 a.m. and 4 p.m. serially and diurnal weight gain was normalized (NDWG) as a percentage by subtracting the 7 a.m. weight from the 4 p.m. weight, multiplying the difference by 100, and then dividing the result by the 7 a.m. weight. NDWG was 2.2 +/- 1.5% for 47 male patients compared (P = 0.001) with 0.6 +/- 0.4% for 11 male controls. NDWG was 1.7 +/- 0.7% for 18 female patients compared (P less than 0.0001) with 0.5 +/- 0.3% for 14 female controls. We hypothesize that NDWG may be an index of both the severity and duration of the schizophrenic disorder.
Adult↗
Legal aspects of first aid and emergency care: 1.
The decision whether or not to intervene in a first-aid situation carries certain implications for nurses. This article, the first in a 3-part series, examines nurses's duty to act at the scene of an accident and the legal implications of intervention.
Emergency Medical Services↗
Cancer pain: psychological management using hypnosis.
In the treatment of cancer, particularly when pain is a serious symptom, psychological support of a patient is important and can, in fact, facilitate ongoing oncologic treatment. Hypnosis represents a psychological technique of great potency for reducing pain, increasing patients' life-enhancing attitudes, and helping patients deal with death and separation. Ultimately, the value of hypnosis lies in enabling an individual to potentiate inner capacities for creating psychological quiescence and physical comfort. For a suffering cancer patient, relief that comes from within can provide a much-needed experience of personal efficacy and strength.
Adult↗
Child health--a taste of things to come.
Explore the source record for details and available documents.
Curriculum↗
The emergency nurse as a writer.
Explore the source record for details and available documents.
Emergency Medicine↗
Transduction of human renal carcinoma cells with human gamma-interferon gene via retroviral vector.
We used a retroviral vector containing a human gamma-interferon (gamma-IFN) gene to transduce 13 renal carcinoma cell lines. The transduction efficiencies ranged from 0% to 60%, as determined by using an analogous vector containing the LacZ marker gene. In addition, gene-transferred resistance to the antibiotic neomycin was used to select for transduced cells. Nine of 13 lines were successfully transduced. Transduction was associated with the morphologic change of elongation, and there was a marked decrease in cell growth rate. Transduced cells secreted varying amounts (20-1076 pg/10(6) cells/d) of gamma-IFN as measured by enzyme-linked immunosorbent assay for at least 2 to 3 weeks after transduction (including 1 day of transduction, 6-7 days of selection, and an additional 8-12 days before the first passage of the transduced cells). Human leukocyte antigen (HLA) class II expression was markedly increased in six of seven cell lines; HLA class I expression was significantly increased in two of eight lines. Transduced cells that were subjected to cryopreservation after irradiation still produced gamma-IFN and expressed HLA class I and II antigens, although generally at lower levels than before these manipulations. This study confirms that retroviral vector transduction of the human gamma-IFN gene into renal carcinoma cells is feasible and associated with persistent production of gamma-IFN and increased expression of HLA class I and II molecules, and these effects are retained after irradiation and cryopreservation. This suggests that an autologous tumor cell vaccine trial with irradiated gamma-IFN gene-transduced renal carcinoma cell is rationale and feasible.
Carcinoma, Renal Cell↗