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  • 1
    ISSN: 1432-0428
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-0428
    Keywords: Insulinoma ; IRI content of insulinoma ; ultrastructural categorization of insulinomas ; proinsulin content of insulinomas ; functional defect in insulinomas reduced storage capacity of insulinoma cells ; non-granular insulin release ; proinsulin content of human pancreas ; diazoxide response of insulinomas
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Thirty human insulinomas have been investigated histologically and their immunoreactive insulin (IRI) content estimated. In most cases immunohistological and ultrastructural studies were also performed and the percentage of proinsulin-like components (PLC) in the tumour determined. Except for 1 case the IRI concentration in the tumours was lower (0.01–89.0 U/g) than in the islet tissue. Histologically, immunohistologically and ultrastructurally a variable number of tumour cells contained few and often no beta-granules, indicating a decreased storage capacity for insulin. This defective storage capacity seems to be the major functional abnormality of insulinoma cells. Ultrastructurally four types of insulinoma can be distinguished. The ultra-structural diagnosis of an insulinoma can only be made in type I (typical beta-granules, 13 cases) and type II (typical and atypical granules, 7 cases) but not in type III (atypical granules only, 4 cases) and type IV (virtually agranular, 4 cases). The type IV tumours had the lowest IRI concentration and did not respond to diazoxide treatment. The IRI concentration of the uninvolved pancreas of 19 patients was 2.0±0.2 U/g and in the range of non-diabetic adults. — The percentage PLC in 19 insulinomas was higher (5.3–22%) than in the pancreas of human adults with and without insulinoma (1.7–4.8%). The percentage of PLC in the serum of patients with insulinoma was always higher than in their tumours (33–61%). It is suggested that the higher PLC levels found in the tumour and serum of insulinoma patients are the consequence of the reduced storage capacity of the tumour cells resulting in a rapid passage through the granular route or even a non-granular release of newly synthesized insulin.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Diabetologia 8 (1972), S. 250-259 
    ISSN: 1432-0428
    Keywords: Insulinoma ; immunohistologic investigation of B-cell tumours ; peroxidase labelled antibodies ; insulin and C-peptide in B-cells ; insulin concentration of insulinomas ; difference between insulin in normal and tumour B-cells
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé 14 insulinomes ont été soumis à un examen immunohistologique à l'aide de la méthode de l'anticorps marqué à la peroxydase. 8 tumeurs ont été étudiées immédiatement après leur extirpation. 7 d'entre elles réagissaient avec les sérums anti-insuline et anti-porcine-C-peptide, mais non avec le sérum anti-glucagon. Un seul carcinome à cellules B avec un contenu en insuline inhabituellement bas, a été négatif. Un an après l'inclusion dans la paraffine, la réaction immunohistologique avec le sérum anti-insuline avait nettement diminué dans les tumeurs, mais non dans les îlots du pancréas adjacent. Chez 6 patients, on disposait de fragments de la tumeur et du pancréas normal inclus dans la paraffine depuis 1 à 4 ans. Dans ce groupe, 4 tumeurs avec un contenu élevé en insuline, n'avaient qu'une faible réaction immunohistologique avec un sérum antiinsuline, et deux tumeurs (l'une avec un contenu élevé en insuline, l'autre avec un contenu faible) ont eu une réaction immunohistologique négative, tandis que les îlots du pancréas adjacent réagissaient fortement dans les six cas. Donc, la réaction immunohistologique de l'insuline dans les tumeurs à cellules B, mais non dans les îlots normaux, dépend du temps écoulé entre l'inclusion dans la paraffine et le moment où elles sont examinées. Seules les tumeurs fixées dans du liquide de Bouin, mais non dans la solution de Karnovsky, ont eu une réaction immunohistologique positive, tandis que les îlots du pancréas adjacent réagissaient positivement après fixation dans la solution de Karnovsky. Ces résultats suggèrent qu'il existe des différences entre l'insuline du pancréas normal et l'insuline des tumeurs. Une comparaison entre la coloration à l'aldéhyde-thionine et l'immunohistologie indique la supériorité de l'immunohistologie dans l'identification des cellules tumorales produisant de l'insuline.
    Abstract: Zusammenfassung 14 insulinproduzierende Tumoren wurden mittels Peroxydase-markierter Antikörper immunhistologisch untersucht. 8 Tumoren gelangten unmittelbar postoperativ zur Untersuchung. Hiervon ließen sich 7 mit einem Antiserum gegen Insulin und Schweine-C-Peptid, nicht aber mit einem Antiserum gegen Glucagon anfärben. Dagegen reagierte ein B-Zellcarcinom mit einer sehr niedrigen Insulinkonzentration mit keinem dieser Seren. Bereits ein Jahr nach der Einbettung in Paraffin ließ die Anfärbbarkeit dieser Tumoren mit einem Antiinsulinserum deutlich nach, während die Inseln des umgebenden normalen Pankreas mit dem gleichen Serum unverändert stark reagierten. — Von 6 weiteren Inseladenomen standen außerdem 1– 4 Jahre altes paraffineingebettetes Tumor- und Pankreasgewebe zur Verfügung. 4 dieser Tumoren hatten eine erhöhte Insulinkonzentration, reagierten immunhistologisch jedoch mit einem Antiinsulinserum nur schwach. Die beiden restlichen Tumoren — einer mit einer hohen, der andere mit einer niedrigen Insulinkonzentration — verhielten sich immunhistologisch negativ. Im Gegensatz zu den Tumoren ließen sich die Inseln des umgebenden Pankreas sämtlicher 6 Fälle mit einem Insulinantiserum gut anfärben. Somit scheint der erfolgreiche immunhistologische Nachweis von Insulin in insulinproduzierenden Tumoren von der Dauer der Einbettung des Tumormaterials in Paraffin abzuhängen. Das Insulin in den Pankreasinseln unterliegt dagegen diesem „Alterungseffekt“ nicht. — TumorInsulin läßt sich nur in Bouin-fixiertem, nicht aber in Karnovsky-fixiertem Gewebe immunhistologisch nachweisen, während das Insulin des normalen Pankreas auch nach Karnovsky-Fixation immunhistologisch nachweisbar ist. Die Befunde sprechen für Unterschiede zwischen normalem pankreatischen und Tumor-Insulin. — Die Färbung der B-Zellen von Tumoren mit Aldehyd-Thionin gelingt seltener als der immunhistologische Nachweis von Insulin in diesen Zellen. Die immunhistologische Untersuchung ist daher zur Identifizierung von B-Zelltumoren den üblichen spezifischen Färbungen überlegen.
    Notes: Summary 14 insulinomas were examined immunohistologically using the peroxidase labelled antibody method. 8 tumours were investigated immediately after extirpation. 7 of these reacted with insulin and porcine-C-peptide antisera but not with glucagon antiserum. Only a B-cell carcinoma with an unusually low insulin concentration was negative. One year after embedding in paraffin the immunohistologic reaction with insulin antiserum had markedly decreased in the tumours; however, not in the islet of the adjacent pancreas. From 6 patients 1 to 4 years old paraffin-embedded material of the tumour and the normal pancreas was available. In this group 4 tumours with an elevated insulin concentration reacted immunohistologically only weakly with an insulin antiserum and two tumours (one with high and one with low insulin concentration were immunohistologically negative, while the islets of the adjacent panceas of all six cases showed a strong reaction. Thus the immunohistilogic reaction of insulin in B-cell tumours but not in normal islets depends on the time elapsed between the paraffin embedding and the examination. Only tumours fixed in Bouin's fluid but not in Karnovsky's solution gave a positive immunohistologie reaction, while the islets of the adjacent pancreas reacted positively also after fixation in Karnovsky's solution. These findings suggest differences between the normal and the tumour insulin. A correlation between aldehyde-thionin stain and immunohistology indicates the superiority of immunohistology in identifying insulin producing tumour cells.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 36 (1971), S. 0 
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: SUMMARY –Fresh and frozen stored mechanically deboned turkey meat was incorporated into frankfurters at the 15% level and compard to red meat frankfurters. Mechanically deboned turkey meat exhibited higher emulsifying capacity than beef but lower than pork on a protein basis. This trend for emulsifying capacity was reversed when reported on a total meat basis. Emulsion stability was not essentially affected by the addition of 15% mechanically deboned turkey meat in red meat frankfurters. Differences flavor tests, preference flavor tests, and TBA values indicated that frankfurters containing 15% mechanically deboned turkey meat were comparable to all red meat frankfurters in flavor stability if fresh deboned poultry meat is used. The use of mechanically deboned poultry meat, which had undergone 90 days of frozen storage, resulted in a significantly inferior product as indicated by flavor evaluation and TBA values. Color evaluation showed slight color fading of all frankfurter treatments during storage. Microbial loads in the three frankfurther treatments showed some increased in total counts during refrigerated storage.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 36 (1971), S. 0 
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: SUMMARY– Infrared spectra of various fats and oils were determined. Ratios of absorbance at 3.3μ (olefinic C—H stretching band) to absorbance of other characteristic triglyceride absorption bands were calculated. Relationships between these ratios and unsaturation, as estimated by iodine value, were determined. Analyses of 25 fats and oils showed that the ratio of absorbance at 3.3μ to absorbance at 3.5μ (aliphatic C—H stretching band) and iodine value were linearly related and exhibited a correlation coefficient of 0.98. Estimation of degree of unsaturation of 19 additional fats and oils revealed an average deviation of ± 0.97 iodine value units or ± 1.12% between measured values and values calculated from infrared absorption patterns.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 38 (1973), S. 0 
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Irradiation pasteurization of flour and bread at 50,000 rads markedly reduced their microflora. Irradiation pasteurization of bread in combination with the irradiated flour extended the period of freedom or low incidence of mold growth when stored at 21–25°C improving the use of fresh bread for flights having several weeks duration. The irradiation process reduced the presence of the mold genera Aspergillus and Penicillium, which suggests an advantage when considering potential toxic metabolites that may result from mold growth. Chemical measurements, involving TBA value, gas chromatography of bread volatiles, and infrared scanning of the bread lipids, did not show any major influences due to the irradiation process. Irradiated white bread samples after short term storage contained a new carbonyl group identified in the infrared scan that was not noted in the control white bread. This same compound, tentatively identified as propionaldehyde, appeared after 12 wk in non-irradiated white bread. Panel evaluations were unable to distinguish aroma, appearance, flavor, texture or freshness differences attributable to the irradiation process used in this study. Within the type of bread specified by NASA, no general detrimental quality changes were observed due to the irradiation treatments used. Overall the results support the application of low dose irradiation in the extension of mold-free fresh bread for space flights.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    The @journal of organic chemistry 39 (1974), S. 2010-2012 
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of medicinal chemistry 14 (1971), S. 60-62 
    ISSN: 1520-4804
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd.
    The @journal of popular culture 7 (1973), S. 0 
    ISSN: 1540-5931
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Ethnic Sciences
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
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