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Biomedical subjects

M Haines

Publications and source records attributed to M Haines.

At least 19 recordsLinked to original sources
PubMed1998

Crowding stress and violent injuries among behaviorally inhibited rhesus macaques.

Environmental stressors and stable individual differences in human behavior have both been implicated etiologically in injuries. Because stress-related injuries are difficult to study experimentally in humans, the authors examined injury incidence in a troop of 21 male and 15 female free-ranging rhesus macaques (Macaca mulatta) before, during, and after a 6-month group confinement. Individual differences in behavioral inhibition to novelty were assessed, using multiple, quantified observations of behavior by 3 independent raters during 3 previous years. Incidence and severity of medically attended injuries were ascertained from veterinary records over a 2-year study period. A 5-fold increase in the incidence of injuries was documented during confinement stress, and an interaction was found between the stressor and behavioral inhibition in the prediction of injury incidence. Highly inhibited animals had significantly higher injury rates during confinement, compared with their uninhibited peers, but equal or lower rates in the low stress periods that preceded and followed confinement. Inhibited individuals appeared to have been specifically targeted for violence during the group stressor but were protected under normative, more predictable conditions.

Accidents↗
PubMed1996

Libraries and the R&D strategy: a way forward.

As guest editor for the December 1994 issue of Health Libraries Review, I chose the theme of Evidence-Based Practice. In my editorial I suggested that Evidence-based Practice offered tremendous opportunities for NHS librarians to demonstrate their skills in supporting a knowledge-based NHS, because many clinicians had complained that they did not have time, retrieval skills of knowledge of relevant information resources to be effective at finding scientific evidence. Librarians, on the other hand have advanced online searching skills, rapid document retrieval and delivery services, and up-to-date knowledge of the world's medical information resources and networks. These skills mean that librarians are not only well-placed to support clinicians in finding and sifting scientific evidence, but also in teaching clinicians how to search for and store information themselves. NHS librarians have not been slow to recognize these opportunities and innovative professional development programmes have appeared to help hone their skills, such as the Librarian of the 21st Century Programme in the Anglia and Oxford region. The success of NHS librarians in supporting evidence-based health care has led to their formal development in evidence-based medicine workshops for clinicians in a number of regions. In March 1996, as NHS Library Adviser. I was asked to prepare a paper for the R&D Board of the NHS Executive about how this library support could be formally integrated into the R&D Strategy. My paper was unanimously endorsed by the Board and later by the Central R&D Committee of the NHS Executive. It suggests principles of library provision in support of R&D and is reprinted below.

Databases, Factual↗
PubMed1996

Changing the perception of the norm: a strategy to decrease binge drinking among college students.

A reduction in college students' binge drinking associated with an intervention to change perceptions of drinking norms is described. The 5-year study was conducted at a public residential campus of 23,000 students. A traditional intervention proved unsuccessful, but a media campaign designed to change student perceptions of the amount of binge drinking showed an 18.5% drop in the number of students who perceived binge drinking as the norm (from 69.7% to 51.2%) and a corresponding reduction in self-reported binge drinking of 8.8% (from 43.0% to 34.2%). The apparent effectiveness of this prevention effort suggested that changing college students' perceptions of drinking norms may lower the proportion of students who engage in binge drinking.

Adult↗
PubMed1995

Inactivation of mecA prevents recovery from the competent state and interferes with cell division and the partitioning of nucleoids in Bacillus subtilis.

The development of genetic competence in Bacillus subtilis requires the synthesis of ComK, a transcription factor, which is normally produced as a culture enters the stationary phase. This synthesis is known to be regulated in part by the protein MecA. Loss-of-function mutations in mecA result in overexpression of ComK and its appearance early during exponential growth. We show here that mecA inactivation also causes a loss of colony-forming ability, especially during stationary phase. This loss is accompanied by the appearance of cells in which normal nucleoid separation has failed to occur. Renografin gradient fractionation of mecA cultures grown to competence reveals that nearly 100% of the cells band at the low buoyant density characteristic of competent cells, and that this low density is competence-related. The loss of viability, the low buoyant density and the nucleoid separation defect, are all comK-dependent. The loss of viability can be reversed by even the transient introduction of mecA+. It is proposed that these effects of ComK overexpression are related to the DNA replication arrest normally exhibited by the competent cell fraction and that MecA is needed to reverse this arrest and to permit escape from the competent state. The shift of nearly 100% of the cells to light buoyant density in a mecA mutant culture strongly suggests that the MecA protein is a regulator of the cell-type-specific expression of competence.

Bacillus subtilis↗
PubMed1993

Information audit: whose line is it anyway?

With the current pace of organizational change within the NHS there is a growing need to examine how information is contributing to business objectives. A valuable tool in this information management review process is the 'information audit'. This paper describes an information audit conducted for a Regional Health Authority. The management and methodology of the project are presented in detail together with the implications for the subject organization and ensuing opportunities for health information professionals.

Data Collection↗
PubMed1993

The pop-out, pull-through suture technique.

New suturing techniques have continually been developed through the years out of a need to provide a more pleasing scar, provide an easier method, or to enhance patient comfort and satisfaction. This article details the pop-out, pull-through suture.

Cicatrix↗
PubMed1993

A comparison of the onset time, duration of action, and fade characteristics of atracurium and vecuronium.

The speed of onset (T1 = 95% twitch depression) and the duration of action (T1 = 25% control) of equipotent doses of atracurium 0.5 mg/kg and vecuronium 0.1 mg/kg were compared in 21 ASA physical status I and II adult patients. Train-of-four (TOF) ratios (height of T4/T1) were also compared with the first response in the TOF recovered to 25% and 50% control, respectively. Neuromuscular function was measured by the Datex NMT 221 electromyograph at the hypothenar muscles. No significant difference was seen in the onset of action of these two drugs, but a significantly shorter duration of action was observed with vecuronium (P < 0.5). Vecuronium was also found to exhibit significantly more TOF fade on offset of block than atracurium. Vecuronium may offer a distinct advantage over atracurium when a nondepolarizer is required for a relatively short clinical case. However, it appears that vecuronium causes more TOF fade during recovery from neuromuscular blockade than atracurium.

Adolescent↗
PubMed1990

Relationship between changes in buoyant density and formation of new sites of cell wall growth in cultures of streptococci (Enterococcus hirae ATCC 9790) undergoing a nutritional shift-up.

When the glutamate concentration of cultures of Enterococcus hirae was raised from 20 to 300 micrograms/ml, the mass doubling time decreased from ca. 85 to 45 min in 9 min, but balanced growth was not reestablished for 30 to 40 min. During the unbalanced period of growth, RNA and protein synthesis proceeded more rapidly than did peptidoglycan synthesis, buoyant density increased from ca. 1.1024 to 1.1075 g/ml, and the rate of formation of new cell wall growth sites transitorily accelerated above the new growth rate. When studied as a function of cell size, all cultures showed buoyant density to decrease around cell separation, increase as cells increased in size, and then plateau when cells reached large volumes. Greater increases in buoyant density as a function of cell size were seen after shift-up, with the greatest increases observed at 15 to 20 min after shift-up, when the rate of formation of new sites was also maximal. In a population of cells examined by electron microscopy 15 min after shift-up, buoyant density and the frequency of cells with new sites increased as old sites approached the size of two poles. These data were consistent with a model whereby buoyant density increases in the terminal stages of the cell cycle when the surface grows slower than the cytoplasm. The greater the difference in the rates of inside to outside growth, the greater the increase in buoyant density and the more frequently new sites will be initiated.

Cell Wall↗