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Biomedical subjects

B Holmström

Publications and source records attributed to B Holmström.

At least 91 records · Page 5Linked to original sources
PubMed1978

Results of the treatment of rectal prolapse operated according to Ripstein.

59 patients have been submitted to abdominal rectopexi according to Ripstein. The operative mortality was 5%, which was, however, not wholly due to the operation. The mortality-rate shows, however, that patients older than 60 years of age must be carefully evaluated preoperatively. The recurrence-rate was 5,4% with a mean observation period of 5 years. The method appears to be satisfactory for treatment of rectal prolapse.

Adult↗
PubMed1978

Fistula-in-ano. A six year follow up study of 143 operated patients.

Of 143 patients operated upon for anal fistulae, all but eight have healed satisfactorally, Impaired healing was seen in patients with high fistulae operated with a modified Elting repair, and in patients suffering from Crohn's disease. When the internal opening was localized and the fistula laid open and excised, healing took place in almost all cases. This method may cause incontinence with high fistulae, and other methods must be used. A loop suture technique gave satisfoactory results both in regard to healing and anal control. Following a modified Elting repair in nine cases, recurrence was seen in four. However, we still believe this method is of value since it leaves the sphincters intact.

Female↗
PubMed1978

A retrospective study of carcinoma of the pancreas with special reference to the results of surgical treatment.

469 patients treated for carcinoma of the pancreas in the County of Stockholm in 1963--73 were analysed for mean survival time, mean hospital-stay, post-operative complications and mortality. The results of treatment with palliative biliary by-pass procedures and radical surgery were compared. The mean survival time after by-pass operation was 5,7 months and after radical surgery 12,8 months. The mean hospital-stay was 39 and 83 days respectively. The post-operative mortality after palliative biliary by-pass procedures was 16%, and the frequence of major post-operative complications 10%. The corresponding figures after radical surgery were 25% and 30% respectively. Despite the longer survival time, it is doubtful if patients benefit from radical surgery.

Adult↗
PubMed1976

[Dry matter losses in mushroom (Lactarius rufus) by blanching].

According to recommended international standards edible fungi are blanched before salting and freezing. A study was conducted on the solution losses of Lactarius rufus due to blanching. Weight losses, changes of dry matter, raw fat, total nitrogen, amino nitrogen and ash contents as well as the pH value were determined when various methods of blanching were used. 3 min blanching at 95-100 degrees C was able to inactivate catalase and peroxydase while 6 min blanching was needed for inactivating polyphenoloxydase totally. After blanching there were 1/10 - 1/100 of spores left. During the 3 min blanching in water five times the quantity of mushrooms the losses of dry matter were about 10%; when doubling the quantity of blanching water the losses increased to 2-3 fold. The doubling of blanching time had no significant influence on the losses. The soluble dry matter content of blanched mushrooms was less than 50% of that of the fresh. Total nitrogen of fresh mushrooms was equal to that of the blanched but the amino nitrogen decreased to one tenth by blanching. The mineral element content of blanched mushrooms was about the half of that of the fresh. Blanching caused a slight decrease in the pH value. The necessity of the blanching of all edible fungi before freezing was discussed.

Basidiomycota↗
PubMed1976

Production of specific antisera for radioimmunoassay of human luteinizing hormone (LH) in the presence of human chorionic gonadotropin (hCG).

A specific radioimmunoassay for LH, which measures plasma LH in the presence of human chorionic gonadotropin (hCG) is described. Rabbits were immunized with highly purified native LH. One of the antisera with a difference in its reactivity against LH and hCG was further purified by affinity chromatography on a column with hCG coupled to Sepharose 4B. The adsorbed antiserum and 125I-LH was used in a double antibody assay. The LH standard (MRC 68/40) efficiently inhibited the binding of 125I-LH, and the standard curve showed a sensitivity of 0.5 ng/ml in the sample. hCG up to 10 000 ng/ml did not inhibit the binding of 125I-LH. The plasma level of LH in pregnant women in the first trimester was low (1.3 +/- 0.1 ng/ml). When LH was measured in fertile or menopausal women with or without stimulation with LH/FSH releasing hormone (LH-RH)X the results agreed to those found with our conventional LH-assay based on antiserum against hCG.

Animals↗
PubMed1976

Production of antisera against highly purified human follicle-stimulating hormone, luteinizing hormone and thyroid-stimulating hormone.

Antisera were produced in rabbits against highly purified preparations of human LH (2000 or 10,000 i.u./mg), human FSH (5500 i.u./mg), and human TSH (7-5 i.u./mg). Most rabbits produced antisera of high titre and high avidity. Cross-reactions were minimal between human TSH and human chorionic gonadotrophin (HCG) and between human FSH and HCG but marked between human LH and HCG. TSH and FSH also showed a constant but relatively weak cross-reaction. LH cross-reacted with FSH to a higher degree than did HCG. The avidity of the antisera was high. It was concluded that much of the lack of specificity recorded for glycoprotein antisera are effects of impure immunogens. Some of the true cross-reactions are probably explained by shared antigenic determinants of the beta-subunits. Unadsorbed antisera could be used for assay of FSH and TSH in plasma from pregnant women.

Animals↗
PubMed1975

Characterization of human growth hormone preparations used for the treatment of pituitary dwarfism: a comparison of concurrently used batches.

Twelve different human growth hormone preparations used concurrently for the treatment of pituitary dwarfism have been studied by gel filtration and radioimmunoassay for GH, FSH, LH and TSH. The GH content of the vials as stated by the manufacturer could be verified by radioimmunoassay in all but one preparation tht contained much less than indicated. All preparations which had been extracted from acetone-preserved glands by various methods were shown to contain large amounts of aggregated growth hormone. By contrast, preparations extraced from frozed pituitaries contained GH mainly in the native monomeric form. FSH, LH and TSH could be detected in all preparations. With the exception of one pre paration containing large amounts of all three glycoprotein hormones, the degree contamination of these hormones was moderate to low. No conclusion could be drawn from the content og glycoprotein hormones as to whether frozen glands or pitutiaries preserved in acetone were used as raw material. The advantage of using growth hormone prepared according to the Roos methods, or any modification of it starting from frozen glands, over preparations made from glands preserved in acetone is discussed.

Acetone↗
PubMed1968

Production of streptokinase in continuous culture.

A method for continuous cultivation of a beta-hemolytic streptococcus, strain H 64, is described. The production of cells and streptokinase at various dilution rates, pH, and temperature were studied in a complex medium supplied with excess glucose. At pH 7.0, productivity of cells and streptokinase, as well as the yield constant with respect to glucose, all increased with increasing dilution rate in the range of 0.1 to 0.5 hr(-1). The production of streptokinase was found to be a function of both growth rate and cell concentration. Although higher concentrations of streptokinase were obtained in experiments with batch cultures, the production of streptokinase in continuous cultures was found to be 2.3 times higher. The possible industrial application of a continuous production method is considered.

Bacteriological Techniques↗
PubMed1967

Production of hyaluronic Acid by a streptococcal strain in batch culture.

A simple method for the production and preparation of hyaluronic acid (HA) is described. Three media were tested, which all supported relatively good yields of cells, but only in one of them were appreciable amounts of HA formed. In this medium, HA was produced during the logarithmic growth phase and showed a molecular weight of 7.3 x 10. HA prepared from 24-hr cultures of the same organism had a molecular weight of only 2.6 x 10. The kinetics of HA production in batch culture were studied, as well as of cell production and glucose consumption.

Journal Article↗