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Biomedical subjects

L Grandi

Publications and source records attributed to L Grandi.

8 recordsLinked to original sources

DNA fragment assembly using neural prediction techniques.

The paper describes an alternative approach to the fragment assembly problem. The key idea is to train a recurrent neural network to tracking the sequence of bases constituting a given fragment and to assign to a same cluster all the sequences which are well tracked by this network. We make use of a 3-layer Recurrent Perceptron and examine both edited sequences from a ftp site and artificial fragments from a common simulation software: the clusters we obtain exhibit interesting properties in terms of error filtering, stability and self consistency; we define as well, with a certain degree of approximation, a metric on the fragment set. The proposed assembly algorithm is susceptible to becoming an alternative method with the following properties: (i) high quality of the rebuilt genomic sequences, (ii) high parallelizability of the computing process with consequent drastic reduction of the running time.

DNA Fragmentation↗

Sensitivity to vecuronium after botulinum toxin administration.

When used to treat focal dystonias, botulinum toxin may cause a transient impairment of neuromuscular transmission in muscles distant from those injected. These systemic effects are not clinically evident, but should not be ignored when patients are exposed to other drugs or conditions that also impair neuromuscular transmission. A patient is described who underwent general anesthesia twice during treatment with botulinum toxin for a long history of blepharospasm. On both occasions, the neuromuscular block produced by vecuronium (0.05 mg kg-1) was monitored in the abductor digiti minimi muscle. Compared with that observed in 24 individuals who were free from neuromuscular problems, the patient's sensitivity to vecuronium was low 90 days after the seventh treatment with toxin and normal 8 days after the ninth. The possibility is considered that repeated treatments with the toxin may cause continuous remodeling of neuromuscular junctions and may cause the patient to develop some tolerance to the action of neuromuscular blockers.

Action Potentials↗

Admission to general hospital psychiatric wards in Italy. 1. A comparison between two catchment areas with differing provision of outpatient care.

Epidemiological comparisons carried out in Italian settings regarded very different areas. In this paper, we investigate the effects on the hospital activity of two different organizational models of care in two neighbouring areas in Northern Italy, Cremona and Mantua, very similar in sociodemographic features. Cremona is hospital oriented, while Mantua has well developed community services. All the patients of the catchment areas admitted during 1986 were studied. Age distribution for males, marital status, education and percentage of employed were very similar in the two samples. However, age distribution and mean age at the time of the first ever psychiatric admission for females were different, as well as the percentage of patients living alone and the percentage of patients discharged home. But the cogent finding was the number of admissions, much higher in Cremona than in Mantua, especially for some age groups. Some explanations of this strong difference, regarding two neighbouring and similar areas, are discussed.

Adolescent↗

Admission to general hospital psychiatric wards in Italy. 2. Inpatient characteristics.

In Italy the 1978 Reform Law established that all psychiatric admissions had to take place in the General Hospital Psychiatric Wards (GHPW). In 1984 a national survey found a national rate of 0.05 GHPW beds per thousand population. However, for several reasons, in Italy very few studies have been carried out on the inpatient population. In this paper we analyse all the patients admitted to the two GHPWs in Cremona, Lombardy Region, during 1986. Males were generally younger than females. The large majority of patients studied lived with relatives and had completed only elementary education; 1/3 of all the inpatients were employed, 1/3 retired or with social security disability and 1/4 housewives. About 25% of them were at the first ever psychiatric admission, and a significant difference was found for the age of the first admission, being higher in females. Concerning the diagnosis, a significant sex difference was found only for depressive neurosis and alcohol related disorders. The need for a better understanding of the role and the functions of the new GHPWs in the Italian psychiatric scene is emphasized.

Adolescent↗