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Biomedical subjects

M Eid

Publications and source records attributed to M Eid.

27 records · Page 2Linked to original sources
PubMed1976

alpha-1-Anti-trypsin, an inhibitor of renin.

A naturally occurring competitive inhibitor of pig kidney renin has been identified in human plasma. The inhibitor was shown to be alpha-1 anti-trypsin and the effect in vitro on the renin activity was examined. The slope in the Hill plot is compatible with the assumption of one-site competitive inhibition. Other proteinase inhibitors, such as alpha-2-macroglobulin and C1 inactivator, however, have no inhibitory effect on the renin-angiotensinogen reaction.

Animals↗
PubMed1976

Pregnancies in the presence of copper intra-uterine devices. Hysterosalpingographic studies.

Two copper-bearing intrauterine devices--the Cu-7 and Cu-T-200--were investigated to determine why contraceptive failures occur with these devices. For this investigation, 155 multiparous women were followed up for at least 24 months after IUD insertion (T-Cu-200 in 75 cases and the Cu-7 in 80 cases). Three women using the T-Cu-200 and 5 women using the Cu-7 became pregnant during the first year. Hysterosalpingographic findings are presented for 8 of these cases and for 2 additional cases (one with each device) who became pregnant during the second year of follow-up. These indicate that uterine abnormalities and disproportions between the uterine cavity's shape and size and that of the device are the primary reasons for device displacement and partial fundal coverage leading to contraceptive failures.

Copper↗
PubMedDate not supplied

Voltammetric determination of N,N'-dinitrosopiperazine in simulated gastric juice.

A voltammetric method has been developed for the determination of N,N'-dinitrosopiperazine (DNPZ) in simulated gastric juice. The method is based on measuring the differential pulse polarographic peak produced in pH 3 Britton Robinson buffer. A well defined, diffusion-controlled cathodic wave was obtained at -0.77 V versus Ag/AgCl over the range 0.4-24 microg/ml with minimum detectability (S/N = 2) of 0.072 microg/ml (5 x 10(-7) M). The proposed method was successfully applied to study the possible in vivo production of the nitroso-derivatives of piperazine under the standard nitrosation reaction conditions recommended by WHO. The method has some distinct advantages over the reported GC methods.

Electrons↗