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  • 1
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    ISSN: 0959-437X
    Keywords: [abr] BC; basic copy ; [abr] LOS; lipooligosaccharide ; [abr] LPS; lipopolysaccharide ; [abr] PMN; polymorphonuclear leukocyte ; [abr] SSM; slipped-strand mispairing ; [abr] URS; upstream repeat sequence ; [abr] VMP; variable membrane protein ; [abr] VSG; variable surface glycoprotein
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-0428
    Keywords: Ninhydrin ; pancreatic islets ; insulin release ; alloxan ; hexoses
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Ninhydrin, a compound which shares chemical properties strikingly similar to alloxan was found to mimic basically the inhibitory effect of alloxan on glucose-induced insulin release. Exposure of pancreatic islets for five minutes to 85 μmol/l ninhydrin produced approximately ninety percent inhibition of subsequent glucose-induced insulin release without altering basal secretion. Both D-glucose and D-mannose provided substantial protection against the inhibitory effect of ninhydrin, and the alpha anomer of D-glucose was more effective than the beta anomer in preventing ninhydrin inhibition of insulin release. Evidence for a common site of inhibition by ninhydrin and alloxan in the insulin release process is discussed.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1433-9285
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Data from a sample of severely and persistently mentally ill involuntary patients indicated that differences in violence between males and females in the 4 months prior to hospital admission depended on the measure. In the bivariate analysis, males had a greater prevalence of violence on the two indicators which separated more serious violence from lesser and no violence; but there was no gender difference on the more inclusive measure which incorporated threats and fights not involving weapons or injuries. In multivariate analysis when other relevant predictors were controlled, gender was significant in predicting only the most inclusive indicator of violence and only in interaction with substance abuse problems.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1433-9285
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Increasing numbers of severely mentally ill individuals are being treated in nonhospital, community-based settings and public concern about potential violence by these individuals has increased, often as a result of tragic, albeit uncommon events. The present study examines potential predictors of serious violence among persons with severe mental illness (SMI), with a specific focus on the joint effect of substance abuse and medication noncompliance. Subjects in the study are involuntarily admitted inpatients with SMI awaiting a period of court-ordered outpatient treatment, termed “involuntary outpatient commitment”. During enrollment in a longitudinal outcome study of the effectiveness of OPC, 331 subjects and, whenever feasible, family members or other informants were interviewed. In addition, complementary data were gathered by review of involuntary commitment records and hospital records. Data collection included sociodemographic characteristics, illness history, clinical status, medication adherence, substance abuse and violent behavior during the 4 months preceding hospitalization. Descriptive and multivariable logistic regression procedures were used to examine the association between serious violent acts and a number of personal, social, and clinical characteristics. The combination of medication noncompliance and substance abuse was a significant predictor of serious violent acts in the community. Individuals who had problems with both alcohol and illicit drug abuse appear to be at greatest risk for violence. These results suggest that reducing violence risk among persons with SMI requires an aggressive approach to improving medication adherence in the context of integrated mental health and substance abuse treatment.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1433-9285
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The need to better understand and manage risk of violent behavior among people with severe mental illness in community care settings is increasingly being recognized, as public-sector mental health systems face mandates to provide more cost-effective services in less restrictive environments. The potential for serious violence in a small proportion of severely mentally ill (SMI) individuals has emerged as a key factor that increases cost and limits continuity and normalization of community-based services for populations with psychiatric disabilities. A major challenge to developing better strategies for risk assessment and management in community care settings involves specifying complex interactions between psychiatric impairment and the conditions of social life – including the quality and frequency of contact with others at close quarters. This is a study of the determinants of violent behavior in a sample of 331 adults with severe mental disorders in community-based treatment. An interaction between severity of functional impairment and frequency of social contact was found to be significantly associated with risk of violence. Among respondents with Global Assessment of Functioning (GAF) scores in the lowest 20%, more frequent contact with family and friends was linked to a higher probability of violent events. However, among better functioning respondents, frequent social contact was associated with lower risk of violence and greater satisfaction with relationships. These findings suggest that, where violence risk is concerned, the most salient feature of psychiatric impairment is the impairment of social relationships –the ways in which disorders of thought and mood not only distort one's subjective appraisal of experience and threat, but impair the ability to relate meaningfully to others, to resolve conflict and derive necessary support from family and friends. Thus, social contact may be a mixed blessing for SMI individuals. For some, it signals a positive quality of life, but for others – particularly those with extreme psychiatric impairment – frequent contact may add to conflict, stress, and increased potential and opportunity for physical violence. The impact of psychiatric impairment on violent behavior cannot be known in isolation, but must be considered in a social context. Effective community-based strategies to anticipate and prevent violence in the lives of persons with severe mental illness must take into account such interactions between social and clinical variables.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1433-9285
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Risk Reconsidered: Targets of violence in the Social Networks of People with Serious Mental illness. This exploratory analysis addresses the questions: 1) Who among the members of the social network of a person diagnosed with a major psychiatric disorder is likely to become a target of violence?; 2) What kind of relationships do targets have with respondents in terms of the quality and quantity of interactions?, and 3) What are the risk factors that contribute to being a target of violence for people who are in the social networks of persons with serious mental disorders? The samples of 169 people with serious mental disorders were followed for 30 months. A logistic regression model of the risk for being a target of violence among the members of the cohort's social network reveals that both target and respondent characteristics are salient, and that mothers who live with adult children who have schizophrenia and co-occurring substance abuse bear a substantially elevated risk of becoming a target of violence, compared to other social network members. Other factors that elevate the risk for being a target of violence are being an immediate family members of the respondent, more time in residence with the respondent, and whether the respondent is financially dependent on the family. Respondents with the most mental health center visits had lower odds of committing an act or threat of violence against a social network member.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Few C6 glioma cells synthesize the astroglia-specific GFA protein in monolayer culture. A uniform population of GFA-positive cells was obtained by aggregating C6 cells in suspension culture, as previously reported for C6 glioma maintained on sponge foam matrices. These results strongly suggest that cell-to-cell interactions promote GFA expression.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1615-6102
    Keywords: Flagellar apparatus ; Green algae ; Phylogeny ; Striated fiber ; Symmetry ; Ulothrix
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The anterior end of the zoospore ofUlothrix belkae has been examined in detail and is compared toStigeoclonium and other filamentous green algae. The nature of the symmetry of green algal motile cells is discussed and the term, 180° rotational symmetry, is proposed to describe the type of arrangement of anterior end components seen inU. belkae, including the four basal bodies, rootlets and striated fibers. The four microtubular rootlets are cruciately arranged. A striated microtubule-associated component (SMAC) has a periodicity of 6.4 nm and extends with each 2-membered rootlet posteriorly into the cell. One 5-membered rootlet passes very near the eyespot. Phylogeny in green algal motile cells is discussed.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1615-6102
    Keywords: Flagellar apparatus ; Green algae ; Rhizoplast ; Rootlets
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The ultrastructure of the flagellar apparatus of the marine quadriflagellate green algaTetraselmis subcordiformis is described in detail. Special consideration is given to the functional significance of the contractile rhizoplast and also to a complex structure which anchors the flagellar apparatus to the cell membrane and theca. The flagellar apparatus lies at the base of a deep apical depression. Four basal bodies lie in a zigzag row with their long axes nearly parallel. Outer adjacent pairs of basal bodies are structurally linked by a Z-shaped, ribbon-like structure. A striated fiber (transfiber) connects each outer basal body with the inner basal body of the opposite, mirror image pair. A complex system of four laminated oval discs (rhizanchora), microtubule rootlets and fibrous material anchor the flagellar apparatus and rhizoplasts to the plasma membrane and theca. A 4-2-4-2 arrangement of microtubule rootlets is present. Rhizoplasts, which are contractile organelles, branch into five distinct arms and associate with the near outer basal body and each of the four rhizanchora. Rhizoplast contraction is thought to be linked to flagellar activity and may act to alter the direction of motion of the cell.
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  • 10
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Biochemistry 24 (1985), S. 3890-3897 
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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