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Biomedical subjects

A Herrera

Publications and source records attributed to A Herrera.

At least 127 records · Page 7Linked to original sources
PubMed1983

Treatment of adult autoimmune thrombocytopenic purpura with high-dose intravenous plasmin-cleaved gammaglobulins.

We present the results of the treatment of 15 adult patients with chronic autoimmune thrombocytopenic purpura with high dose i.v. gammaglobulins. In 11 patients, this treatment produced a remission, complete (platelet counts above 100 X 10(9)/l) in 5, partial (platelet counts between 50 and 100 X 10(9)/l) in 6. In all these patients, the response was transient lasting 2-4 weeks. In 4 patients, no response was observed. We used plasmin-cleaved gammaglobulins which caused rare and mild side effects and gave results similar to those reported with intact human gammaglobulins. The indications of high dose i.v. gamma-globulins in the management of adult patients with autoimmune thrombocytopenic purpura are discussed.

Adult↗
PubMed1978

alpha1-Antitrypsin variants in different racial groups in Malaysia.

In a study of Malaysians of different racial groups, 1,510 sera (908 from Malays, 371 from Chinese and 231 from Indians) were identified for their protease inhibitor (Pi) types. The gene frequencies for the alleles PiM, PiS and PiX in Malays were, respectively, 0.979, 0.015, and 0.007. In Chinese, the frequencies were 0.981, 0.019 and 0.000, and in Indians they were 0.976, 0.24, and 0.000. It is interesting that the usually rare PiX type is found in appreciable frequency in the Malays. Two different types with unusual behavior and obscure origin were also found.

Alleles↗
PubMedDate not supplied

[High-grade direct roentgen magnification--a new possibility in skeletal diagnosis?].

High-grade direct X-ray magnification represents a new technique. Its possibilities are demonstrated taking as example a comparison between histological and directly X-ray magnified images of bone tumour specimens. With its method, which has previously not been introduced, it is possible to obtain images of anatomical structures the display of which was previously the preserve of histological techniques. The still high local radiation exposure currently limits use in the main to basic research.

Bone Diseases↗
PubMedDate not supplied

The effect of commercial processing on incurred residues of DDE in meat products.

The influence of processing on the degradation of DDE in meat products was investigated. First, the current level of contamination in six different types of Spanish meat products was determined. Analysis were carried out by capillary gas chromatography with electron capture detector. Of the three residues analysed (both o,p' and p,p' isomers of DDT, DDD, and DDE), only p,p'-DDE was found above the detection limit of 4 micrograms/kg fat. The frequency of p,p'-DDE detection for the various products investigated varied between 78 and 100% of the 129 samples analysed, although mean levels were very low, in the range within 6-16 micrograms/kg. No sample contained DDE residues above the EC maximum residue limit of 1 mg/kg for DDT and metabolites on meat products. Mean concentrations of DDE in Spanish meat products have declined since 1980 by more than 10-fold as compared with previously reported data. Meat products following three commercial processes were analysed to compare the levels of DDE in the finished products with those obtained in the starting material. The average levels of DDE remained unchanged after 30 days of curing in 26 samples of pork sausage. Similarly, mean DDE concentrations were essentially constant throughout the ripening process to which 30 hams were subjected. Finally, cooking in an oven (80-82 degrees C for 100 min) of 20 pork bologna samples produced an apparent increase of 12.5% in mean p,p'-DDE levels that was not statistically significant (p > 0.05).(ABSTRACT TRUNCATED AT 250 WORDS)

Animals↗
PubMedDate not supplied

Clinical efficacy of new quinolones for therapy of nongonococcal urethritis.

Ninety-five patients with nongonococcal urethritis were enrolled in a double-blind study and were randomly assigned to a one-week treatment with ciprofloxacin (500 mg twice daily) or ofloxacin (200 mg twice daily). Two weeks after treatment the results obtained for the 79 evaluated patients were as follows: 59 patients (75%) were clinically cured, and of the 54 patients with initial positive cultures, 39 (72%) remained culture-negative. We did not find any statistically significant differences between the results obtained with the two treatments. These results did not vary with the cause. Patient compliance with the regimens of two doses per day was excellent, and no serious adverse effects occurred with either drug.

Adult↗
PubMedDate not supplied

Multiresidue determination of organochlorine pesticides and polychlorinated biphenyls in milk by gas chromatography with electron-capture detection after extraction by matrix solid-phase dispersion.

A multiresidue analytical method based on matrix solid-phase dispersion was developed to analyze liquid milk for 22 organochlorine pesticides (OCPs) and 6 polychlorinated biphenyls (PCBs). Initial extraction is performed by loading 3 mL milk onto a 2.0 g octadecyl (C18)-bonded silica cartridge with n-hexane as the eluant. Neutral alumina column chromatography with sodium sulfate as the drying agent is used for further cleanup. The eluate is concentrated to 0.5 mL, and target analytes are determined by capillary gas chromatography with electron-capture detection. The optimized method was validated by determining accuracy (recovery percentages), precision (repeatability and reproducibility), and sensitivity (detection and quantitation limits) from analyses of milk samples fortified at 10 and 1 microg/L levels. Average recoveries were between 74 and 106% for all residues except beta-HCH, beta-endosulfan, and endosulfan sulfate. Both repeatability and reproducibility relative standard deviation values were < 22% for all residues. Detection limits ranged from 0.02 to 0.12 microg/L and quantitation limits were between 0.02 and 0.62 microg/L. The proposed analytical method may be used as a fast and simple procedure in routine determinations of OCPs and PCBs in milk.

Animals↗