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Biomedical subjects

J Ullrich

Publications and source records attributed to J Ullrich.

At least 55 records · Page 3Linked to original sources
PubMed1995

[Disease models and change in attitude of involuntarily admitted schizophrenic patients].

The attitude to illness and therapy of 28 involuntary and 31 voluntary patients admitted to a state psychiatric hospital was investigated by means of a questionnaire at the time of admission and prior to discharge. Involuntary patients have less illness consciousness, and only 17.9% of them but 67.7% of the voluntary patients show insight into their illness; they favour a medical-somatic model of illness and express less positive therapy expectations. Their whole attitude proves to be dysfunctional concerning compliance with medical treatment. Attitudes of involuntary patients changed during the hospital stay and became similar to those of voluntary patients, which hardly changed. This attitudinal change extended to illness consciousness, insight into illness and therapy expectations, whereas models of illness were found to be very stable. One third of the involuntary patients stayed in hospital voluntarily for further treatment. It is discussed that patients attitudes to illness and therapy should be taken more often into consideration and integrated into the planning of therapy.

Attitude to Health↗
PubMed1995

Identification of the gonococcal glmU gene encoding the enzyme N-acetylglucosamine 1-phosphate uridyltransferase involved in the synthesis of UDP-GlcNAc.

In searching for the gonococcal sialyltransferase gene(s), we cloned a 3.8-kb DNA fragment from gonococcus strain MS11 that hybridized with the oligonucleotide JU07, which was derived from the conserved C terminus of the sialyl motif present in mammalian sialyltransferases. Sequencing of the fragment revealed four putative open reading frames (ORFs), one of which (ORF-1) contained a partial sialyl motif including the amino acid sequence VGSKT, which is highly conserved among sialyltransferases. The gene was flanked by two inverted repeats containing the neisserial DNA uptake sequence and was preceded by a putative sigma 54 promoter. Database searches, however, revealed a high degree of homology between ORF-1 and the N-acetylglucosamine 1-phosphate uridyltransferase (GlmU) of Escherichia coli and Bacillus subtilis and not with any known sialyltransferase. This homology was further established by the successful complementation of an orf-1 mutation by the E. coli glmU gene. Enzyme assays demonstrated that ORF-1 did not possess sialyltransferase activity but mimicked GlmU function catalyzing the conversion of N-acetylglucosamine 1-phosphate into UDP-N-acetylglucosamine, which is a key metabolite in the syntheses of lipopolysaccharide, peptidoglycan, and sialic acids.

Amino Acid Sequence↗
PubMed1994

Ullrich Replies.

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Journal Article↗
PubMed1992

Delta-electron emission in fast heavy ion atom collisions.

Biological damages such as mutations, chromosomal aberrations etc. are a consequence of biochemical changes mostly in the DNA. With ionizing radiation, these chemical changes are due to primary ionization events and secondary ionization effects caused by the primarily produced electrons. Differences in the biological response of densely ionizing radiation, like heavy charged particles, in comparison to sparsely ionizing radiation, such as X- or gamma-rays, are mainly due to the differences in the production of the so called delta-electrons. Therefore, the emission process of electrons i.e. the cross section for the primary ionization event as well as the energy and angular distribution of the emitted electrons should be understood in detail. The delta-electron emission processes occuring in fast heavy ion atom collisions are explained qualitatively. The different spectral structures of electron emission arising from either the target or the projectile are explained in terms of simple models of the kinetics of momentum transfer induced by the COULOMB forces. In collisions of very heavy ions with matter, high nuclear COULOMB forces are created. These forces lead to a strong polarization of the electronic states of the participated electrons. The effects of this polarization are discussed.

Argon↗
PubMed1991

Prevalence of antibody to HIV-1 among entrants to US correctional facilities.

Prevalence of antibody to the human immunodeficiency virus type 1 (HIV-1) was assessed among 10,994 consecutive male and female entrants to 10 correctional systems in the United States. The HIV-1 seroprevalence for the 10 systems ranged from 2.1% to 7.6% for men and 2.5% to 14.7% for women; seroprevalence among women was higher than among men across nine of 10 systems. Using age 25 years to divide the population, HIV-1 prevalence among young women (5.2%) was significantly higher than among young men (2.3%), but similar to that in both older women (5.3%) and older men (5.6%). Overall, HIV-1 rates for nonwhites (4.8%) were higher than those for whites (2.5%). Although categories were identified across correctional systems, which may serve to focus prevention programs, variability in rates among correctional systems indicates that program planning must take local conditions into consideration.

Acquired Immunodeficiency Syndrome↗