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Biomedical subjects

M Bruni

Publications and source records attributed to M Bruni.

At least 19 recordsLinked to original sources
PubMed2001

Gravitational collapse on the brane: a no-go theorem.

We investigate how braneworld gravity affects gravitational collapse and black hole formation by studying Oppenheimer-Snyder-like collapse on a Randall-Sundrum-type brane. Without making any assumptions about the bulk, we prove a no-go theorem: the exterior spacetime on the brane cannot be static, which is in stark contrast with general relativity. We also consider the role of Kaluza-Klein energy density in collapse, using a toy model.

Journal Article↗
PubMed1999

Evaluation of a bar-code system for nutrient analysis in dietary surveys.

OBJECTIVE: A novel system for nutrient analysis has been developed and tested over 5 years. Its key features are a nutrient database of 600 commonly eaten foods (95% of foods eaten in 7-day surveys); a booklet identifying each food with a bar code, bar codes for gram weight and for portion sizes (small, medium, large) and a bar-code reader with dietary analysis software for PCs. In the present study the bar-code system has been evaluated by comparison with a commonly used manual entry nutrient analysis software for dietitians' use. DESIGN: Cross-sectional. SETTING: Glasgow city district. SUBJECTS: One hundred and sixty adults aged 18-65 years old. RESULTS: Comparing mean intakes for macro- and micronutrients, using the Bland and Altman method, the bias between the two methods was small, ranging from 0.93 to 1.03. The bar-code system took significantly less professional time in data entry and nutrient analysis than the widely used manual system (29min per 7-day diary vs. 47 min per 7-day diary, P < 0.001). CONCLUSIONS: It is suggested that the bar-code system offers greater speed with a saving of professional time needed for nutrient analysis of dietary surveys. This system is commended for maintaining accuracy while promoting economy.

Adolescent↗
PubMed1997

Impact of Travel-Related Health Impairments.

Background: Few recent data exist on the impact of travel-related health problems. Methods: A cohort study was conducted with follow-up by questionnaire of 2567 persons who had consulted the Zurich University Travel Clinic for travel health advice prior to visiting a developing country or eastern Europe. Of those questioned, 2109 (82.2%) could be evaluated. Results: More than one-third (800; 37.9%) had a health impairment, mainly illness leading to medical consultations in 224 (10.6%) individuals. Incapacitation was reported by 303 (14.4%) travelers, accounting for 2% of the total time abroad. The most frequent reasons for incapacitation were diarrhea and the common cold, particularly when accompanied by fever. Some 57 (7.1%) travelers consulted a doctor while abroad, and more than twice as many did so after returning home. Conclusions: This survey illustrates that despite efforts of travel medicine, the attack rate of health impairments remains virtually unchanged compared to 20 years ago. It provides one of the first overviews of incapacitation in travelers. To reduce the duration of incapacitation, one may wish to consider a travel kit which allows the patient self therapy for frequent and uncomplicated ailments.

Journal Article↗
PubMed1997

Homelessness and vulnerability among adults with and without alcohol problems.

While many works compare traits of homeless adults across levels of alcohol use, few specifically consider whether drinking status affects determinants of either homelessness or "vulnerability" to homelessness. This paper relies on a 1986 Chicago, Illinois sample (n = 535) to consider the potential contributions of resources, social network characteristics, disaffiliation, and mental health problems. Results suggest that resource problems may determine homelessness regardless of drinking status. But drinking-associated problems may raise the resource threshold for "vulnerability," reduce the protection afforded by social networks against both homelessness and "vulnerability," increase the deleterious impact of disaffiliation, and spur complicating mental health problems.

Adult↗
PubMed1996

Validation of a computerised measurement system for guided routine evaluation of cardiovascular autonomic neuropathy.

A study for evaluating the use of the Cardionomic system was conducted in six Italian Centres for Diabetes. Cardionomic is a portable computerised system that is used for a guided step-by-step performance of several cardiovascular tests for autonomic neuropathy (heart rate and blood pressure). It has been compared to the traditional method using an electrocardiograph. In this study, which involved 74 diabetic patients, 392 cardiovascular tests were conducted with the electrocardiograph and 392 were done using the portable system. The results were compared to the results obtained with the ECG assuming the latter as the standard ones. All the indices of validity that were investigated (sensitivity, specificity, positive predictive value, negative predictive value, positive likelihood ratio, negative likelihood ratio) indicate that the proposed system is reliable. Because it saves a considerable amount of time and is also easy to use, it represents a valid alternative for the routine screening of autonomic neuropathy.

Adult↗
PubMed1995

Paths and impacts in the progressive independence model: a homelessness and substance abuse intervention in Chicago.

In an attempt to reduce homelessness and substance abuse, Chicago graduates of short-term inpatient substance abuse programs who lacked domiciles were placed into one of three conditions: (1) a case management only intervention (n = 96), (2) a case management with supported housing intervention (n = 136), or (3) a control condition (n = 187) that allowed access to normal aftercare in the community. The two treatment interventions used a "progressive independence" approach, which focuses on simultaneously ameliorating tangible needs and clinical problems. Multivariate analyses suggest that subjects in both treatment interventions experienced lower levels of substance abuse and higher levels of residential stability than subjects in the control condition, as measured over the course of a year. Further analysis suggests that retention was improved by the focus on immediate tangible resources, substance abuse was reduced by both the support of outpatient substance abuse treatment and the promulgation of changes in coping styles, and residential stability was increased by both the focus on access to income maintenance benefits and help with location of housing.

Activities of Daily Living↗
PubMed1991

Evaluation of new computerized method for recording 7-day food intake in IDDM patients.

OBJECTIVE: To evaluate a new computerized method for recording 7-day food intake. RESEARCH DESIGN AND METHODS: Randomized crossover trial was conducted with patients recording the amount and type of every food and drink consumed during a week by either a computerized device (Food-meter) or recording the data in a diary. Each method was applied twice. Twenty-one insulin-dependent diabetic patients (mean +/- SD age 25 +/- 9 yr) were studied. RESULTS: The two methods showed very good agreement in the evaluation of the patients' diets (1792 +/- 408 vs. 1764 +/- 436 kcal/day, 84 +/- 19 vs. 82 +/- 21 g/day protein, 68 +/- 22 vs. 67 +/- 23 g/day fat, 210 +/- 60 vs. 207 +/- 58 g/day carbohydrate with the conventional and computerized methods, respectively). The variability between the methods and the variability within each method were of similar magnitude. CONCLUSIONS: The Food-meter represents a useful tool for computerizing the 7-day food record. The method is easy, reliable, and time saving. Moreover, it minimizes the risk of transcriptional errors.

Adult↗
PubMed1990

Asymmetrical distribution of beta-endorphin in cerebral hemispheres of suicides: preliminary data.

The assessment of beta-endorphin levels in several symmetrical brain regions of seven suicides and seven sudden death controls reveals a decreased concentration in the left temporal cortex, the left frontal cortex, and the left caudate nucleus of suicides compared to controls. Moreover, the comparisons of beta-endorphin concentrations in the symmetrical brain regions reveals an asymmetrical concentration in suicides (left less than right) in frontal cortex and caudate nucleus. These data confirm previous reports of abnormalities of neurochemical pathways in the brains of suicides and suggest that suicidal behavior might be related to the lateralized mechanisms of mood control.

Adult↗
PubMed1980

A follow-up of the protein pattern after operations in patients treated with an oral enzyme.

The sera of 32 patients have been studied in order to assess the behaviour of the main proteins, which could be identified with a two-dimensional electrophoresis, after operation. 20 of them were given an oral enzyme preparation of trypsin/chymotrypsin (Chymoral 100/F); the others were given no therapy. The analysis was performed comparing the relative concentration of 17 proteins in the pre-operative phase and the fifth day after the operation. Some variations known already and induced by this therapy (like the increase of alpha-1-antitrypsin), have been confirmed, but it has also been demonstrated, in the patients treated with Chymoral, a clear reduction of the constant loss of albumin and pre-albumin, which occurs after an operation.

Blood Protein Electrophoresis↗