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  • Articles  (2,552)
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    European journal of nutrition 25 (1986), S. 129-145 
    ISSN: 1436-6215
    Keywords: soybean-based formula ; infant feeding ; cow's milk intolerance ; allergic diseases
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Medicine
    Description / Table of Contents: Summary The purpose of this review is to evaluate the nutritional quality of soybean-based infant diets on the basis of results published in the scientific literature. Special consideration has been given to the use of soybean protein formulas for infants with reduced intestinal digestion and absorption capacity as well as in cases of cow's milk intolerance and allergic diseases.
    Notes: Zusammenfassung Zweck dieser Arbeit ist es, eine Evaluierung der ernährungsphysiologischen Qualität von Säuglingsfertignahrungen auf Sojabasis unter Berücksichtigung der einschlägigen wissenschaftlichen Literatur vorzunehmen. Bei dieser Beurteilung findet die Indikation von Sojanahrungen bei verminderter Resorptionskapazität des Darmes und Unverträglichkeitserscheinungen besondere Berücksichtigung.
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  • 2
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    European journal of nutrition 25 (1986), S. 171-179 
    ISSN: 1436-6215
    Keywords: risk ; galactose ; hydrolyzed lactose ; toxicity ; galactose-1-phosphate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Medicine
    Description / Table of Contents: Zusammenfassung Wir haben die Wirkung einer Glukose-Galaktose-Zufuhr, wie sie bei Aufnahme von Lebensmitteln mit hydrolysierter Laktose auftreten kann, untersucht. Dazu erhielten 5 gesunde erwachsene Versuchspersonen morgens nüchtern je 32,3 g Glukose plus 32,3 g Galaktose (entsprechend 125 g eines Magermilchpulvers mit hydrolysierter Laktose). Die postprandialen erythrozytären Galaktose-1-Phosphat-(Gal-1-P-)Spiegel stiegen bei keinem der Probanden höher als 22,3 Μmol/l gepackter Erythrozyten an. Damit erreichten die Konzentrationen dieses Indikatormetaboliten lediglich 22 % der Spiegel, die sich bei galaktosämischen Kindern als sicher herausgestellt haben, was die Entstehung von Leberoder Hirnschäden bzw. Katarakten angeht. Wir schließen daraus, daß das Kriterium der erythrozytären Gal-1-P-Spiegel kein Stoffwechselrisiko beim Konsum von hydrolysierter Laktose erkennen läßt. Hingegen ist die Aufnahme von Galaktose allein ohne Glukose von 17fach höheren Plasma-Galaktosespiegeln und einer ca. 8fach höheren erythrozytären Gal-1-P-Konzentration begleitet. Die Zufuhr von Galaktose allein dürfte daher ein erheblich höheres Stoffwechselrisiko verursachen.
    Notes: Summary This study deals with the metabolic effects of hydrolyzed lactose: After an overnight fast 5 healthy adult volunteers consumed a glucose-galactose mixture equivalent to 61.4g of lactose (or 125g of a dried skim milk powder with hydrolyzed lactose). The postprandial rise of erythrocyte galactose-1-phosphate (gal-1-P) never exceeded 22.3 Μmol per liter packed red blood cells. This amounts to no more than 22 % of the levels known from galactosemic children to be safe, concerning ocular, neural or hepatic damage. We conclude that the consumption of the hydrolyzed lactose does not cause a risk for consumer's health as judged from this galactose metabolite. A considerably higher risk, however, may accompany the consumption of galactose alone which causes around 17-fold higher plasma galactose levels and around 8-fold higher erythrocyte gal-1-P concentrations for more extended time periods.
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  • 3
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    European journal of nutrition 25 (1986), S. 209-219 
    ISSN: 1436-6215
    Keywords: intestinale Transfersysteme ; epitheliale H+-Sekretion ; „saures Mikroklima“ ; Resorption schwacher Elektrolyte
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Medicine
    Description / Table of Contents: Summary The nutrient uptake from the intestinal lumen into the distributing blood circulation is mediated by the epithelial cell of the small intestine. The transfer process through this distinctly polar cell consists of three partial events: entrance of substances through the brush-border membrane, traversal of a metabolic active intracellular space and exit through the baso-lateral membrane. The fundamental transfer mechanisms — simple diffusion, facilitated diffusion, antiport and symport systems, electroneutral and electrogenic processes — are described. The significance of nutrient metabolization for transport processes is discussed: proton secretion by the epithelial cell coupled to the glucose and lactate metabolization is quoted as an illustration. The “acid microclimate” resulting from this proton secretion on the mucosal surface has a significant influence on weak-electrolyte absorption. This effect was clearly demonstrated for in vitro uptake of nicotinic acid into the intestinal tissue. It can be assumed that — similar to the role of a Na+-gradient — the proton gradient on the surface of absorptive epithelia is highly significant as a driving force of nutrient absorption.
    Notes: Zusammenfassung Die Epithelzelle der Dünndarmschleimhaut vermittelt die Nährstoffaufnahme aus dem intestinalen Lumen in das Verteilersystem des Blutkreislaufs. Der Transferprozeß durch diese ausgeprägt polare Zelle setzt sich aus drei Teilvorgängen zusammen: dem Eintritt von Substanzen durch die Bürstensaummembran, dem Durchqueren eines metabolisch aktiven Intrazellularraumes und dem Austritt an der basolateralen Membran. Es werden die grundsätzlichen Transfermechanismen — einfache Diffusion, erleichterte Diffusion, Antiport- und Symportsysteme, elektroneutrale und elektrogene Vorgänge — beschrieben. Welche Bedeutung die Metabolisierung von Nährstoffen in der Epithelzelle für Transportvorgänge haben kann, wird am Beispiel des Glucose- und Lactatstoffwechsels und der daran gekoppelten H+-Ionen-Sekretion der Epithelzelle erörtert. Das durch die Protonensekretion erzeugte „saure Mikroklima“ an der mukosalen Oberfläche des Epithels hat seinerseits einen bisher wenig beachteten Einfluß insbesondere auf die Resorption schwacher Elektrolyte, wie dies am Beispiel der Nicotinsäureresorption überzeugend nachgewiesen wurde. Es kann angenommen werden, daß dem H+-Ionen-Gradienten an der Oberfläche resorbierender Epithelien eine dem Na+-Gradienten vergleichbare Bedeutung als treibende Kraft der Nährstoffresorption zukommt.
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  • 4
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    European journal of nutrition 25 (1986), S. 220-227 
    ISSN: 1436-6215
    Keywords: vegetable proteins ; weaning foods
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Medicine
    Description / Table of Contents: Zusammenfassung Das Hauptziel dieser Arbeit ist es, den Einfluß von pflanzlichem Eiweiß aus verschiedenen Hülsenfrüchten in der Ernährung von Kleinkindern aufzuzeigen. In parallelen Versuchen wurden Proteine aus der Melone, aus Raps und Sojabohnen sowie aus einer Mischung derselben insgesamt 60 Albinoratten verfüttert, um das Wachstum und den Stickstoffmetabolismus im Gewebe zu bestimmen. Cerelac® diente als Kontrollsubstanz. Mit der Proteinmischung wurden hinsichtlich des Proteinwirkungsverhältnisses (Protein efficiency ratio, PER) und des Nettoproteinverhältnisses (net protein ratio, NPR) Ergebnisse erzielt, die gut mit der Kontrollgruppe korrelieren. Wird jedoch das jeweilige Protein allein verabreicht, sinkt die Stickstoffretention in der Zelle, und das Wachstum der Tiere ist geringer. Deshalb sollten vor allem in Entwicklungsländern pflanzliche Eiweiße in Form von Mischungen zur Herstellung von Babynahrung eingesetzt werden.
    Notes: Summary The effect of mixing different sources of vegetable proteins from legumes in the preparation of infant weaning foods was investigated. Melon, cowpea and soya as sole protein sources or as a mixture were fed to 60 albino rats. A milk powder-based commercial product (Cerelac) was used as control diet. The mixture of the vegetable protein diet compared favourably with the control diet in terms of growth rate, protein efficiency ratio (PER) and net protein ratio (NPR) and also ensured optimum nitrogen content in liver, kidney and muscle tissues. In contrast the use of individual protein sources failed to support satisfactory growth and were inferior to those in animals fed with the control or mixed diets. It was thus concluded that in the developing countries an application of such a mixture of vegetable proteins may be suitable in the preparation of weaning foods.
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  • 5
    ISSN: 1436-6215
    Keywords: zinc availability ; casein ; whey protein ; retention study
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Medicine
    Description / Table of Contents: Zusammenfassung Ziel der Untersuchung war es, die Verfügbarkeit von Zink aus zwei semisynthethischen Kostformen, die isoliertes Molkenprotein (Wp D) bzw. isoliertes Casein (Cas D) als Proteinkomponente (20 Gew.%) enthielten, zu vergleichen. Je 14 wachsende männliche Ratten pro Gruppe (Anfangsgew. 40 g) wurden mit diesen Diäten 21 Tage lang ad libitum gefüttert. Die Kostformen enthielten mit 18 ppm eine bedarfsdeckende Zinkdosis. Zur radioaktiven Markierung des Zinks wurden jedem Tier täglich ∼ 13 μg65Zn (=4 μ Ci) intragastral gesondet. Die Untersuchung war hauptsächlich als Retentionsstudie angesetzt, es wurden jedoch auch allgemeine Parameter wie Gewichtsentwicklung, Futter- und Trinkwasseraufnahme, Organgewichte u. a. erfaßt und die Aktivität der alk. Phosphatase in Serum und Femurgewebe bestimmt. Während der Versuchsperiode wurde aus der Wp D signifikant mehr65Zn (36,5%) im Ganzkörper retiniert als aus der Cas D (31,6%). Analoges gilt für die65Zn-Retention im Femur und für die65Zn-Konzentration im Femur und Haar sowie für die Gesamt-Zink-Konzentration (65Zn und nicht markiertes Zink) im Femur. Bei den sonstigen Parametern war kein eindeutiger Einfluß der Proteinkomponente festzustellen. Die Untersuchung hat eindeutig bewiesen, daß das Zink aus einer Kostform mit Molkenprotein besser verfügbar ist als aus einer Diät mit Casein als Proteinkomponente. Den Grund hierfür sollen weitere Experimente klären.
    Notes: Summary The availability of zinc from two semi-synthetic diets with isolated whey protein (Wp D) or with isolated casein (Cas D) as protein component (20% W/ W) was compared in a 21-day study with growing male rats (initial weight 40 g; 14 animals/group). Zinc concentration in both diets (18 ppm) was adequate to meet the requirements of the animals fed ad libitum. For radiolabeling ∼ 13μg65Zn (=4 μ Ci) was given daily by intragastric intubation to each animal. The investigation was designed primarily as a retention study, but also general parameters like weight development, food and water intake, organ weights etc. were registered and the activity of alkaline phosphatase was determined in serum and femur tissue. A significantly higher percentage of65Zn was retained in the whole body from the Wp D (36.5%) than from the Cas D (31.6%) during the experimental period. The same is valid for the percentage retention of65Zn in the femur and for the65Zn concentration in femur and hair as well as for the total zinc concentration (65Zn and non-labeled zinc) of the femur. The other parameters determined were not unequivocally influenced by the protein component of the diet. The study clearly demonstrated that the availability of zinc by the growing rat was better from a diet with whey protein than from one with casein as the protein component. The reason on this phenomenon has to be elucidated by further investigations.
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  • 6
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    European journal of nutrition 25 (1986), S. 146-164 
    ISSN: 1436-6215
    Keywords: Sulfit ; Tagesaufnahme ; Stoffwechsel ; Toxikologie ; Unverträglichkeitsreaktionen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Medicine
    Description / Table of Contents: Summary This short review summarizes properties, applications and effects of sulfite in food products, including sulfite residues in foods produced according to legal regulations. Sulfite metabolism and toxicology in the mammalian organism as well as appearance of adverse reactions following ingestion of sulfite-treated food are discussed. Although knowledge in this area is still incomplete, the continued use of sulfite in food technology can be justified.
    Notes: Zusammenfassung Es wird eine kurze übersicht über Eigenschaften, Verwendung und Wirkung von Sulfit bei der Lebensmittelproduktion und der unter Beachtung der gesetzlichen Vorschriften resultierenden Restmengen von Sulfit in Lebensmitteln gegeben. Nach Gegenüberstellung von Metabolisierung und Toxikologie des Sulfits im Säugetierorganismus und dem Auftreten von Unverträglichkeitsreaktionen nach dem Verzehr sulfitierter Lebensmittel wird ein potentiell vorhandenes Gesundheitsrisiko diskutiert. Es wird auf einige Kenntnislücken hingewiesen. Trotz dieser Lücken kann die kontrollierte Verwendung von Sulfit bei der Lebensmittelproduktion weiterhin gerechtfertigt werden.
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  • 7
    ISSN: 1436-6215
    Keywords: intestinal bacteria ; colonic microflora ; Acarbose ; anaerobic metabolization ; microorganisms
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Medicine
    Description / Table of Contents: Zusammenfassung Acarbose wurde mit einem künstlichen In-vitro-System auf Biotransformation durch lebensfähige intestinale Mikroflora geprüft, die aus den unteren Darmabschnitten von Probanden und Ratten stammte. Dazu wurde14C-Acarbose mit Darmkeimen, Nährstoffen und Spurenelementen inkubiert. Das Metabolitmuster von Acarbose setzt sich sowohl bei Menschen als auch bei der Ratte im wesentlichen aus Komponente 2, einem um Ring D ärmeren Homologen aus der Acarbose-Reihe, aus einem basischen Disaccharid, das aus den Ringen B und C des Ausgangsmoleküles besteht, und Komponente 1 zusammen. Letztere Verbindung entsteht durch spontane Umlagerung des nicht faßbaren Acarviosins (Ring A und B) in die trizyklische Verbindung mit Oxazolidin-Struktur. Acarviosin wird bei der Abspaltung von Ring C aus Komponente 2 gebildet. Das Metabolitmuster von Acarbose verändert sich durch eine mehrwöchige Einnahme dieser Substanz im Vergleich zum nicht adaptierten Menschen oder zur nicht adaptierten Ratte gravierend. Adaptierte intestinale Mikroflora liefert sowohl aus Acarbose als auch aus der trizyklischen Komponente 1 reichhaltigere Metabolitmuster. Neben den oben beschriebenen Produkten konnten methylierte, hexosylierte und n-butyrylierte Derivate von Acarbose und/oder Komponente 2 nachgewiesen werden.
    Notes: Summary The biotransformation of Acarbose (Bay g 5421) by an artificial in vitro system with viable intestinal microorganisms was investigated. The bacteria were obtained from the colon of man or from the caecum and colon of rats and were incubated anaerobically with14C-Acarbose in a nutrient solution. The metabolites were separated and purified by Chromatographic methods and identified by nuclear magnetic resonance (1H;13C) spectrometry and by mass spectrometry. Metabolites in man and rat are component 2 (minus the terminal glucose of Acarbose), a basic disaccharide consisting of rings B and C, and component 1. This latter substance is formed, after hydrolytic cleavage of the internal glucose of Acarbose, by spontaneous rearrangement of rings A and B (Acarviosine) into a tricyclic oxazolidine. The metabolite pattern of Acarbose is changed profoundly after several weeks of pretreatment of man or rat with this compound. The microflora adapted in such a manner yields in addition methylated, hexosylated, and n-butyroylated derivatives of Acarbose and/or component 2.
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  • 8
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    European journal of nutrition 25 (1986), S. 228-232 
    ISSN: 1436-6215
    Keywords: Rhizopus delemar ; lipids production ; carbon and nitrogen sources ; composition of lipids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Medicine
    Description / Table of Contents: Zusammenfassung Extrakte aus Sojamehl mit Zusatz von Glucose bzw. Ölsäure dienten als Wachstumsmedium fürRhizopus delemar. Ein Einfluß der Zusätze auf die Produktion von Biomasse, Gesamtlipiden und Gesamtglyzeriden wurde beobachtet, wenn Ammoniumnitrat als Stickstoffquelle diente. Die größten Mengen an Biomasse (12,4 g/l) und an Gesamtlipiden (310 mg/g trockene Biomasse) wurden in auf Glucose gewachsenen Myzelien erhalten. Die großen Anteile an Gesamtglyzeriden und an ungesättigten Fettsäuren in den Lipiden vonRhizopus delemar legen nahe, solches Lipidmaterial für Ernährungs- und industrielle Zwecke zu verwenden.
    Notes: Summary Soy bean extract with glucose or oleic acid in the growth medium ofRhizopus delemar affected the production of higher values of biomass, total lipids and total glycerides than when ammonium nitrate was used as a source of nitrogen. The highest amounts of biomass (12.35 g/l) and total lipids (310 mg/g dry biomass) were attained in glucose-grown mycelia. The high proportions of total glycerides and unsaturated fatty acids in lipids ofRhizopus delemar suggest the utilization of such lipid material for nutritional and industrial purposes.
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  • 9
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    European journal of nutrition 25 (1986), S. 253-258 
    ISSN: 1436-6215
    Keywords: Jejunalmucosa ; Carbohydrasen ; Dünndarm ; Zuckeraustauschstoffe
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Medicine
    Description / Table of Contents: Summary Mixed carbohydrases from human jejunal mucosa were characterized by Michaelis constants and maximal velocities of hydrolysis of 15 disaccharides and disaccharide alcohols, mainly of the glucosylfructose series. The presumed fate of such substances after oral ingestion may be foreseen from the km and vmax data. There is principal agreement that wholesomeness in man and animals as well as energetic utilization of disaccharides and split products correlate well with the enzymological data. Therefore the metabolic fate of sugar substitutes in the human body is partially predictable from such enzymic studies.
    Notes: Zusammenfassung Das Carbohydrasengemisch der Jejunalschleimhaut des Menschen ist durch Ermittlung von Michaelis-Konstanten und Maximalgeschwindigkeiten der Hydrolyse gegenüber 15 Disacchariden und Disacharidalkoholen — hauptsächlich der Glucosylfructose-Reihe — charakterisiert worden. Aus einer gemeinsamen Betrachtung von km-Wert und vmax werden Folgerungen für das Schicksal dieser Substanzen nach oraler Einnahme gezogen; am Menschen oder im Tierversuch erhaltene Daten zur Verträglichkeit und zur energetischen Verwertung von Disacchariden und ihren eventuellen Reduktionsprodukten stehen in prinzipieller Übereinstimmung mit den enzymologischen Daten, denen daher ein Vorhersagewert für das metabolische Verhalten von Zuckeraustauschstoffen zukommt.
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  • 10
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    Journal of plant growth regulation 5 (1986), S. 29-35 
    ISSN: 1435-8107
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Tomato fruit ripening and ethylene production were inhibited following treatment with methyl bromide (MB). Methyl bromide significantly delayed ripening initiation in mature-green (MG) fruit and retarded the rate of ripening of turning (T) fruit as measured by color development and flesh softening. Treatment with MB caused an initial transient burst of ethylene production, but the subsequent ripening-associated increase in ethylene was delayed. Ethylene treatment partially overcame MB inhibition in MG fruit but had no affect on T fruit. The inhibition of ethylene production by MB appears to be due to lack of formation of 1-aminocycloprone-1-carboxylic acid (ACC) in MG fruit, whereas in T fruit lack of conversion of ACC to ethylene is indicated. A key feature of MB inhibition of ripening in tomato appears to be reduced sensitivity to ethylene.
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  • 11
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    Journal of plant growth regulation 5 (1986), S. 49-57 
    ISSN: 1435-8107
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Forty six soybean (Glycine max [L.] Merr.) varieties were evaluated for their vegetative response to a foliar application of abscisic acid, benzyladenine, or o-methoxyphenyl phosphinic acid (OMPA). Varietal responses to each chemical ranged from no effect to severe growth retardation. When the same varieties were evaluated for their response to water stress, the length of time required for severe wilting ranged from 48 h to 120 h. A cluster analysis was used to relate the coefficient of parentage of the varieties with their response to chemicals or water stress. The response of a variety to one of the chemicals did not predict the response to a different chemical. Further, the response of a variety to a chemical did not predict the response of a similar variety to the same chemical. The water stress rating was neither related to the chemical responses nor to the coefficient of parentage for the varieties in the test. The effects of night interruption and darkness were more pronounced on northern than on southern varieties, analogous with the pattern of reproductive regulation by photoperiod.
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  • 12
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    Journal of plant growth regulation 5 (1986), S. 73-83 
    ISSN: 1435-8107
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract A computer-based video digitizer system is described which allows automated tracking of markers placed on a plant surface. The system uses customized software to calculate relative growth rates at selected positions along the plant surface and to determine rates of gravitropic curvature based on the changing pattern of distribution of the surface markers. The system was used to study the time course of gravitropic curvature and changes in relative growth rate along the upper and lower surface of horizontally-oriented roots of maize (Zea mays L.). The growing region of the root was found to extend from about 1 mm behind the tip to approximately 6 mm behind the tip. In vertically-oriented roots the relative growth rate was maximal at about 2.5 mm behind the tip and declined smoothly on either side of the maximum. Curvature was initiated approximately 30 min after horizontal orientation with maximal (50°) curvature being attained in 3 h. Analysis of surface extension patterns during the response indicated that curvature results from a reduction in growth rate along both the upper and lower surfaces with stronger reduction along the lower surface.
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  • 13
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    Journal of plant growth regulation 5 (1986), S. 91-100 
    ISSN: 1435-8107
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The plant growth regulator (−)-jasmonic acid (JA) and its stereoisomer (+)-7-iso-jasmonic acid (7-iso-JA) have been isolated from young fruits ofVicia faba L. and identified by TLC, GC, GC-MS, and chemical transformation. Different isolation procedures gave different ratios of JA/7-iso-JA because of partial isomerization of (+)-7-iso-JA to (−)-JA. Optimal conditions, excluding artificial isomerization, were checked by the addition of [U-14C]-7-iso-JA. The naturally occurring isomer ratio was determined to be 65% (−)-JA: 35% (+)-7-iso-JA in immature broad bean fruits. The biological activities of both isomers of JA have been studied using several bioassays. Growth of wheat and GA3-stimulated dwarf rice seedlings is inhibited more effectively by (+)-7-iso-JA than by (−)-JA. In growing seedlings of barley and oat, both isomers caused a senescence-like bleaching effect characterized by chlorophyll and carotenoid decrease. The free acids are more active than their methyl esters in intact barley plants in contrast to results obtained in leaf segment tests. Highest activity was obtained with (+)-7-iso-JA.
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  • 14
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    Journal of plant growth regulation 5 (1986), S. 59-72 
    ISSN: 1435-8107
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The potential adverse phytotoxic effects of the herbicide safeners CGA-92194 {α-[1,3-dioxolan-2-yl-methoxy)imino]benzeneacetonitrile}, cyometrinil [α-(cyanomethoxy)imino-benzeneacetonitrile] and flurazole [phenylmethyl 2-chloro-4-(trifluoromethyl)-5-thiazole-carboxylate] on selected metabolic processes of enzymatically isolated leaf cells of soybean [Glycine max (L.) Merr.] were compared in time- and concentration-course studies. CO2 fixation, protein synthesis, RNA synthesis, DNA synthesis, and lipid synthesis were assayed by the incorporation of NaH14CO3, [14C]-leucine, [14C]-uracil, [3H]thymidine, and [14C]-acetate, respectively, into the isolated cells. CGA-92194 and cyometrinil behaved similarly, and at low concentrations (0.1, 1, and 10 μM) they stimulated rather than inhibited the five metabolic processes assayed, following incubation periods of up to 2 h. At the highest concentration of 100 μM, both safeners inhibited all metabolic processes of the soybean leaf cells but neither compound exhibited rapid and distinct inhibitions as might be expected in the case of inhibition of a primary target site by a potent inhibitor. At low concentrations and early incubation periods (30 and 60 min), flurazole effects on all metabolic processes were also stimulatory rather than inhibitory. However, the stimulation of CO2 fixation by 0.1 and 1.0 μM was highly significant. At 100 μM flurazole was extremely potent on all metabolic processes of soybean leaf cells examined. At the 2-h incubation period, flurazole also inhibited all metabolic processes at concentrations lower than 100 μM. The sensitivity of the five metabolic processes to flurazole decreased in the following order: photosynthesis = lipid synthesis 〉DNA synthesis〉protein synthesis〉RNA synthesis.
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  • 15
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    Journal of plant growth regulation 5 (1986), S. 85-89 
    ISSN: 1435-8107
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Previous studies have shown that N-[2,4-dimethyl-5[[(trifluoromethyl)sulfonyl]amino]phenyl]acetamide (mefluidide) represses seedhead formation in gramineae. The objective of this study was to determine the effect of mefluidide on growth and reproduction of wheat (Triticum aestivum L. cv TAM 105). Mefluidide was applied to field grown wheat at 140 and 280 g/ha on March 4, 1985 and at 70, 140, and 280 g/ha on March 18, 1985. Mefluidide suppressed heading to a greater extent when applied 6 weeks after the onset of spring growth than when applied 2 weeks earlier. Leaf area index was reduced by the higher application rates at the second date of application but not the first. Total biomass was reduced to a greater extent at the second application date. Both seed weight and number of seeds per spike were reduced with the higher rates of mefluidide especially at the second application date.
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  • 16
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    Journal of plant growth regulation 5 (1986), S. 121-121 
    ISSN: 1435-8107
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
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    ISSN: 1572-8099
    Keywords: Heat detectors ; smoke detectors ; response time ; t2-fires ; gas flow ; computer routines
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    Notes: Abstract Recently developed methods to calculate the time required for ceiling mounted heat and smoke detectors to respond to growing fires are reviewed. A computer program that calculates activation times for both fixed temperature and rate of rise heat detectors in response to fires that increase in heat release rate proportionally with the square of time from ignition is given. This program produces nearly equivalent results to the tables published in Appendix C, Guide for Automatic Fire Detector Spacing (NFPA 72E, 1984). A separate method and corresponding program are provided to calculate response time for fires having arbitrary heat release rate histories. This method is based on quasi-steady ceiling layer gas flow assumptions. Assuming a constant proportionality between smoke and heat released from burning materials, a method is described to calculate smoke detector response time, modeling the smoke detector as a low temperature heat detector in either of the two response time models.
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    Fire technology 22 (1986), S. 77-79 
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    Fire technology 22 (1986), S. 80-84 
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    Fire technology 22 (1986), S. 89-90 
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    Fire technology 22 (1986), S. 136-147 
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    Keywords: Fireline production ; fire management ; simulation model
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    Notes: Abstract An initial attack model was sensitive to changes in production rate of suppression forces, as shown by changes in final fire size. The adequacy of fireline construction rates used in fire planning models has been questioned. A fire containment model was tested over a range of suppression force productivities to show the effect on final fire size. The percentage of fires that escaped was sensitive to the productivity of line-building units. The degree of sensitivity depended on the severity of environmental conditions. Final fire size was most affected by fireline construction rates under the most severe environmental conditions tested. Using distributions of production rates from weighted averages of the results produced final fire sizes similar to those obtained using point estimates in the simulation model. Planners may be able to use graphs like those presented, in place of iterations of a fire containment model.
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    Fire technology 22 (1986), S. 167-168 
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    Fire technology 22 (1986), S. 169-172 
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    Fire technology 22 (1986), S. 173-174 
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    Fire technology 22 (1986), S. 174-175 
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    ISSN: 1572-8099
    Keywords: Fire protection design ; extinguishment ; halon ; detectors ; sprinklers ; flame spread ; microelectronic fabrication facilities ; clean rooms ; polypropylene
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    Notes: Abstract An applied engineering program is described which investigates the fire safety of combustible wet stations used within microelectronic clean room fabrication facilities. The main concern involves the impact of a wet bench fire on the clean room environment of the fabrication facility. The effectiveness of the installed fire detection and suppression systems are discussed as well as the additional steps which should be taken in order to insure early detection and suppression of fires within wet benches.
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    Agriculture and human values 3 (1986), S. 5-9 
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    Agriculture and human values 3 (1986), S. 33-72 
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    Agriculture and human values 3 (1986), S. 91-145 
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    Agriculture and human values 3 (1986), S. 171-179 
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    Agriculture and human values 3 (1986), S. 201-201 
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    Agriculture and human values 3 (1986), S. 4-4 
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    Agriculture and human values 3 (1986), S. 21-25 
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    Agriculture and human values 3 (1986), S. 81-83 
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    Agriculture and human values 3 (1986), S. 85-86 
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    Agriculture and human values 3 (1986), S. 16-23 
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    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Policies are set by governments in an attempt to bring about desired ends within a society. These ends are often vaguely put and phrased in terms of values. Agrarianism, as a value, has been used to justify current farm policy. Yet, that policy has also been used as a mechanism to solve a variety of problems for the United States: those of the rural sector, farmers themselves, and even the land upon which they farm. This paper tries to separate the problems that are part of the farm crisis and to show how policies designed to solve one of the problems for one set of actors, and frequently defended in the name of agrarianism, may actually exacerbate the problems for other actors. An overarching value, however, that may further inhibit problem solution and lead us further into an expensive and ineffectual farm program is the basic value that planning is somehow bad. Agrarianism and the value of spontaneity underlie some of the current decision-making or lack thereof in the farm program.
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    Agriculture and human values 3 (1986), S. 43-53 
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    Notes: Abstract Family farm ideology encapsulates one strand of the historical relations of Americans to the land. An examination of gender differences in historical experiences of land in Iowa suggests that men and women have had different patterns of access to land and to profits from agricultural enterprises. Where men have seen the land as a resource to be exploited, women have tended to view land as a setting for reciprocal interaction. In the late nineteenth century the state promoted the family unit as a source of cheap labor in the development of the central United States to provide capital for the industrialization of the Atlantic seaboard. It was on this basis that Iowa farming developed. Before World War II the farm man, as head of the farm operation, managed the production of farm commodities and conducted the farm market transactions; the woman reproduced the farm labor force and exchanged goods and services locally through personal contacts. Since World War II the family farm has changed structurally, but the family farm ideology has persisted as a basis for the construction of farm policy emphasizing private property and free enterprise. Such an ideology is no longer consistent with a goal of economic democracy. The experience of women on the land provides elements of an alternative ideology which stresses reciprocal nurture, cooperation and shared good.
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    Agriculture and human values 3 (1986), S. 66-74 
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    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract This paper reviews the current and future implications of the recent farm financial problems of Missouri for the rural and state economy. To provide a backdrop against which the current and future financial situation may be assessed, the paper first looks at the farm income trends of the state for the period 1964–1985. Although the level has dropped drastically since 1982, the study found that net income had increased significantly for most of the study period. However, the trend in farm debt shows that between 1974 and 1982, total farm debt of Missouri farmers almost tripled. In fact, the farm financial situation in the state deteriorated faster than did farm financial situations in the nation. As a result, Missouri was the leader in the number of farm bankruptcies in the nation in 1985. The paper shows that, since the full-time family farms make up over seventy (70%) percent of the state's total farm, the greater financial problems, resulting in farm losses, occurred in these groups of farms, which are the source of the economic and social health of rural Missouri. It then indicates the serious effects that this wave of farm failures, which amounts to a depopulation of farms and farm families, has on the social and economic structure of rural communities, cheap but reliable food supply system, and competition within the farm sector. To keep the farm sector competitive and for the family farm to survive, the paper identifies the need for innovative policies (and suggests some), and for the cooperation and coordination of efforts among different agencies and organizations in the country.
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    Agriculture and human values 3 (1986), S. 99-107 
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    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Agriculture should be viewed not as an industry but rather as a set of sectors organized around region, commodity, and institution. As such, agriculture adjusts well to a situation of “abundance” (excess supplies of major commodities). Although these sector interests are often referred to as “special interests,” they have effectively used public policy to generate agricultural development, and will continue to have a developmental impulse. Sector interests will, therefore, resist most proposals based on macrosystem perspectives which would reduce government support for agricultural development. These sectors will continue to be quite influential in deciding agricultural policy, though they will find it possible to adjust not only to “abundance” in the market place, but also to such political constraints as may be imposed in pursuit of such goals as consumer health, soil conservation, and environmental preservation.
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    Fire technology 22 (1986), S. 33-44 
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    Keywords: Smoke control ; low momentum ventilation ; smoke detectors ; flaming and smoldering fires ; hazard time
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    Topics: Architecture, Civil Engineering, Surveying
    Notes: Abstract Full scale fire tests have been carried out in order to study the influence of different ventilating principles on the time point of fire detection and the smoke filling of a four-bed room. Using conventional mechanical ventilating systems as “smoke exhaust systems” the time difference left for evacuation of the fire room can be positively influenced. With the conventional ventilating system operating there is a significant difference between time points of detection of the ionization and optical smoke detectors, for both flaming and smoldering fire. Using the “low momentum displacement ventilation” this difference is reduced, resulting in possibilities for the ionization smoke detector to be optimized for both flaming and smoldering fires.
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    Fire technology 22 (1986), S. 66-69 
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    Fire technology 22 (1986), S. 75-76 
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    Fire technology 22 (1986), S. 70-74 
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    Fire technology 22 (1986), S. 104-121 
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    Keywords: Plastic pipe ; heat transfer ; solid mechanics ; von Mises yield criterion ; plane stress ; temperature profile ; polybutylene pipe ; internal pressure ; water flow
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    Notes: Abstract A computer model for predicting the onset of yielding in pressurized plastic pipe exposed to fire conditions has been developed. The model couples the aspects of solid mechanics and heat transfer to simulate the pipe performance. The von Mises yield criterion from solid mechanics is applied to predict yielding resulting from the plane stress induced in the pipe wall from the internal water pressure. The heat transfer analysis is performed via a finite difference approach to estimate the temperature profile in the pipe wall resulting from exposure to a heated ceiling jet. Results are reported of estimates for the time to yielding for 1 and 1 1/4 in. (25 and 32 mm) SDR-11 polybutylene pipe at three selected locations relative to the fire considering a range of internal pressures and water flow rates inside the pipe.
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    Fire technology 22 (1986), S. 184-209 
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    Keywords: Fire suppression ; postflashover fires ; mathematical modeling ; water spray ; fire development ; char ; pyrolysis ; heat flux
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    Notes: Abstract The Swedish Fire Research Board and the U.S. Federal Emergency Management Agency are sponsoring a project to further the understanding of the basic mechanisms involved, as well as to support the development of standards for and to seek ways of improving the performance of portable fire suppression systems used by fire departments. This paper describes a physically based computer model developed to simulate one aspect of the problem: the manual suppression of postflashover fires. This includes: (1) an overview of the physical basis behind the model; (2) a comparison of model predictions with available experimental data, and (3) an analysis of fire suppression effectiveness using the model. The analysis concludes that, when direct access and extinguishment of the burning fuel is not possible, improved fire control occurs with water sprays having a Rosin-Rammler distribution of droplet sizes with volume-median-drop diameters in the 0.15 to 0.35 mm range. This agrees with available experimental data. It is also shown that fire fighting venting and standoff distance requirements may lead to more severe fires requiring more water for control; although venting and water spray induced air/gas flow also serve to channel hot steam and gases away from the fire fighter adding to his safety. The analysis also shows that allowing higher gas and surface temperatures at fire control through improved fire fighter protective clothing and equipment design reduces water flow rate requirements. Additional experimental work is recommended before all these conclusions are considered definitive.
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    Fire technology 22 (1986), S. 210-233 
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    Keywords: Postflashover fires ; pyrolysis ; cellulosic fuels ; stoichiometry ; char ; reactor model ; burning regimes ; modeling ; normalized heat load ; thermal absorptivity
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    Topics: Architecture, Civil Engineering, Surveying
    Notes: Abstract The NRCC model of fully developed compartment fires is discussed. Although the mathematics involved is quite simple, it allows a rather comprehensive simulation of the fire process. The model offers an explanation for the findings that ‘ventilation control’ is related to the pyrolysis mechanism and is not a result of scarcity of air in the fire compartment, and that thermal feedback is of secondary importance in the “burning” (pyrolysis) of cellulosic fuels. Another feature of the model is the introduction of the normalized heat load concept. The normalized heat load is a scalar quantity that depends on the total heat absorbed by the compartment boundaries during the fire incident, and is practically independent of the temperature history of the fire. A simple explicit formula has been proposed and proved experimentally to describe the normalized heat load for real-world fires with fair accuracy. The normalized heat load concept offers a simple means for converting fire severities into fire resistance requirements, and makes it possible to design buildings for prescribed levels of structural fire safety. The potential of fires to spread by convection and the expected characteristics of fires of noncharring plastics are also discussed.
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    Fire technology 22 (1986), S. 260-262 
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    Fire technology 22 (1986), S. 263-266 
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    Fire technology 22 (1986), S. 271-271 
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    Fire technology 22 (1986), S. 269-270 
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    Fire technology 22 (1986), S. 311-328 
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    Keywords: Polystyrene ; foam plastic ; insulation ; fire resistance ; coatings ; tray fire
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    Notes: Abstract A test program was undertaken by the Mine Safety and Health Administration (MSHA) to determine the feasibility of coating polystyrene block walls for fire protection. Selected coatings, used in the mining industry, were tested under semilarge scale, simulated mine fire conditions to determine the appropriate thicknesses of these coatings for protection of the polystyrene foam block against fire for specified time periods. Building plasters containing gypsum and perlite and an expanded vermiculite, portland cement, and limestone coating were particularly effective in protecting the foam blocks against the heat of the simulated mine fire.
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    Fire technology 22 (1986), S. 346-348 
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    Fire technology 22 (1986), S. 341-345 
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    Keywords: Electrical contacts ; pitting ; melting ; aluminum ; brass ; copper ; zinc ; nickel ; steel ; alloying
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    Fire technology 22 (1986), S. 349-351 
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    Fire technology 22 (1986), S. 352-353 
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    Fire technology 22 (1986), S. 354-355 
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    Agriculture and human values 3 (1986), S. 1-4 
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    Agriculture and human values 3 (1986), S. 26-32 
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    Agriculture and human values 3 (1986), S. 83-90 
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    Agriculture and human values 3 (1986), S. 157-170 
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    Agriculture and human values 3 (1986), S. 191-200 
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    Agriculture and human values 3 (1986), S. 1-3 
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    Agriculture and human values 3 (1986), S. 15-20 
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    Agriculture and human values 3 (1986), S. 33-40 
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    Agriculture and human values 3 (1986), S. 6-15 
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    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract There has been much discussion of changing agricultural structure in the United States. In this paper, the author reviews some of the factors contributing to structural change in the United States and describes the policies adopted by the European Community with respect to agricultural structure. The European experience with structural policies suggests that this approach is not very promising for the United States where no specific structural policies exist. The argument developed in this paper is that structural changes in agriculture are simply one example of economic adjustment in a capitalist economy, that economic adjustments are generally desirable although they are not costless, and that discussions of agricultural structure should focus on methods to alleviate the costs of adjustment rather than on efforts to prevent change.
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    Agriculture and human values 3 (1986), S. 24-31 
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    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Since the late 1960's, a mix of government policies has prevented the loss of farmland in Sweden, “either to forest or asphalt”; these policies have also ensured the maintenance of soil fertility and groundwater resources. However, in Sweden as in several other European nations, a chronic and growing “grain glut” in recent years has undermined the economic logic of import protection and farm price supports—the principle means of promoting a sustainable agriculture. Mainstream economists, imbued with urban-biased and production-centered values, have long criticized these costly mechanisms of public support as cost-ineffective and socially unjustified. They and many prominent politicians tend to minimize the non-production benefits of maintaining an open “working landscape” and rural communities dependent upon agriculture. Historically, Sweden's major farm organizations and its agrarian political party have resisted this economistic view with considerable success. Therefore it was a shock to many observers when, in 1986, leaders of the Swedish Federation of Farmers itself proposed planting trees on crop land as one element of a solution to overproduction. This essay traces the evolution of Swedish farm debates and policies since World War II, leading to the present critical juncture. It explores the incipient alliance between farmers and conservationists to protect farmland (as well as family farms and farm communities) and assesses the prospects for maintaining land in production through diversification into biomass energy crops and high protein fodder crops (the former option takes on new significance in the wake of the Chernobil disaster and pressure for early de-commissioning of Sweden's nuclear power plants; the latter would reduce Swedish dependence on imported soybeans). Finally, there is speculation on the relevance of Sweden's experience for American farmland policy.
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    Agriculture and human values 3 (1986), S. 59-65 
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    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The current crisis in U.S. agriculture has broadcast a rather simplex message. It is that the traditional family farm is in serious trouble. This message is apparent in the agricultural programs that have emerged in direct response to the farm crisis. Using Michigan's experience as illustration, these programs are shown to share similar objectives supported by a singular policy orientation. They utilize a ‘farm as firm’ model and treat the small farm operation as the unit of problem analysis and remedial action. They focus attention inward upon the ‘victim’ and attempt to change the victim's behavior through improved farm and farmer management. The paper considers the limitations inherent in this prevailing orientation. At the same time, it argues for the utility of an alternative perspective—one that places the farm in a wider context and considers the relationships between the farmer/victim and those who are more powerful—locally, nationally, and internationally. It advocates the need for research and programs that question these extra-farm relationships and their implications for farmer behavior. If agricultural programs are to assist the family farm, on any but a short-term basis, it is these relationships, and not the farmer, that must be changed.
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    Agriculture and human values 3 (1986), S. 107-107 
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    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
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    Fire technology 22 (1986), S. 175-176 
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    Fire technology 22 (1986), S. 179-179 
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    Fire technology 22 (1986), S. 177-178 
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    Fire technology 22 (1986), S. 181-182 
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    Fire technology 22 (1986), S. 183-183 
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    Fire technology 22 (1986), S. 253-256 
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    Fire technology 22 (1986), S. 234-252 
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    Keywords: Chimneys ; creosote ; fire safety ; fire tests ; flues ; heating equipment ; stoves ; wood
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying
    Notes: Abstract A series of tests was conducted in five instrumented chimneys to study the intensity and duration of chimney fires due to the ignition and burning of combustible deposits accumulated on chimney linings over a prolonged period of time. These tests were conducted: (1) to establish typical conditions including temperatures in the chimneys and on combustible surfaces nearby, and (2) to determine the duration of the burnout as evidenced by elevated temperatures within the chimney. The results of these tests point out some areas where the codes and standards covering residential wood heating appliances should be updated to better protect against failure due to chimney fires.
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    Fire technology 22 (1986), S. 257-259 
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    Fire technology 22 (1986), S. 272-294 
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    Keywords: Egress ; flow density ; projected area ; flow velocity ; stairways ; pedestrian movement ; evacuation requirements
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    Topics: Architecture, Civil Engineering, Surveying
    Notes: Abstract This paper discusses a design method for calculating pedestrian movement developed by Predtechenskii and Milinski and provides an egress model based upon this work for the evacuation of multistory buildings via staircases with regard to real evacuation tests in high rise office buildings. Furthermore, it briefly compares its predictions with regulatory requirements on means of escape.
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    Fire technology 22 (1986), S. 329-340 
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    Keywords: Shipboard fires ; low expansion foams ; high expansion foams AFFF ; dry chemicals ; sodium bicarbonate ; potassium bicarbonate ; Monnex ; protein foam ; alcohol foam
    Source: Springer Online Journal Archives 1860-2000
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    Fire technology 22 (1986), S. 295-310 
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    Keywords: Smoke detector ; dwelling ; smoldering fire ; visibility ; escape
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    Topics: Architecture, Civil Engineering, Surveying
    Notes: Abstract Operation of domestic smoke detectors (photoelectric and ionization) has been investigated in a typical Melbourne dwelling using smoke from smoldering hardboard and artificial smoke generated at three widely different rates. Detector performance was assessed according to the escape time offered by its operation, this being based on the criterion of visibility needed to effect escape. Under these test conditions detectors located in bedrooms performed adequately only when smoke originated in the same room; they provided poor escape times for smoke originating elsewhere. Also, ionization detectors usually provided adequate escape times only when smoke travel from the source room to the rest of the dwelling was restrained by small door openings, since it then took longer for visibility to be lost. Photoelectric detectors were generally more effective than ionization detectors, as expected for smoldering conditions, and when located in the hallway provided adequate escape times for most conditions of size and location of smoke source.
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    Agriculture and human values 3 (1986), S. 10-25 
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    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
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    Agriculture and human values 3 (1986), S. 74-82 
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    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
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    Agriculture and human values 3 (1986), S. 146-156 
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    Agriculture and human values 3 (1986), S. 180-190 
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    Agriculture and human values 3 (1986), S. 202-202 
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    Agriculture and human values 3 (1986), S. 5-14 
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    Agriculture and human values 3 (1986), S. 84-84 
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    Agriculture and human values 3 (1986), S. 1-5 
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    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
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    Agriculture and human values 3 (1986), S. 32-42 
    ISSN: 1572-8366
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract An analysis of social goals for agriculture presupposes an account of systematic interactions among economic, political, and ecological forces that influence the performance of agriculture in a given society. This account must identify functional performance criteria that lend themselves to interpretation as normative or ethical goals. Individuals who act within the system pursue personal goals. Although individual acts and decisions help satisfy functional performance criteria, individuals may never conceptualize or understand these criteria, and, hence, social goals for agriculture may not be intentionally sought or desired by any human being. The statement of social goals is not, therefore, reducible to statements about individual desires and preferences, and the validity of social goals does not depend upon deriving a social welfare function, nor upon measuring interpersonal utility. The paper examines a series of strategies for defining social goals for agriculture, beginning with the statement of goals offered by William Aiken in 1983. Aiken's view stresses individually based constraints upon action, but social goals cannot be adequately defined on this view. Successively more adequate approaches to the problem of social goals are examined with respect to production and efficiency, Jeffersonian democracy, and ecosystem goals of community and self-reliance. The role of family farms, and the change in farm structure is evaluated in light of this analysis for social goals.
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    Agriculture and human values 3 (1986), S. 54-58 
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    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Recent theoretical developments in economic theory have attempted to relax the assumption that human behavior is guided by “tight calculation” of profit-maximization. Harvey Liebenstein's notion of X-efficiency is a particularly important development in this regard. This article argues, however, that X-efficiency theory does not go far enough in relaxing the assumptions of economic theory. The understanding of human behavior requires a recognition of variability in the ends or goals of action as well as variability in the means which are utilized in the pursuit of these diverse ends. Max Weber's concepts of formal rationality and substantive rationality recognize this variability in the ends toward which action is oriented as well as the intrusion of habit or routine in the “calculatedness” of social and economic action. C. Wright Mills' ideal of craftship is used to represent a type of substantive rationality which contrasts with the formal rationality of calculation toward profit-maximization. The case is made that craftship is a particularly significant substantive rationality in American agriculture. It is argued that, among family farmers, other values, such as autonomy in one's work, often constitute alternative ends toward which action may be directed. Such ends may, in fact, conflict with the goal of profit-maximization. It is concluded that agricultural policy analysis and prescription which fails to consider the significant role of substantive rationalities, such as craftship, are likely to reproduce and enhance the conditions from which the present crisis in agriculture has developed.
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    Agriculture and human values 3 (1986), S. 88-98 
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    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Emerging bovine somatotropin (or “bovine growth hormone” [bGH]) technology has become highly controversial even though the technology is one to two years from commercial introduction. The bGH controversy is discussed and placed in the context of the evolution of the American public agricultural research system and farm structural change over the past 15 years. It is argued that while many observers tend to overestimate the degree to which bGH will be representative of other biotechnologies applied to agriculture, the bGH case may well reflect a more general pattern of the changing clientele relations of the land-grant system and of the changing character of technology developed within the public agricultural research system. In particular, these new clientele and technical relations may portend a new era in which farmers begin to scrutinize the land-grant research portfolio, which might in turn lead to diminished political support by state-level farmers' groups for agricultural research appropriations.
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    Agriculture and human values 3 (1986), S. 75-87 
    ISSN: 1572-8366
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The rural crisis of the 1980s is described in terms of the economic and social vulnerability of rural farm areas. The crisis is shown spreading from farms through families to rural communities, schools, churches, counties and beyond. Rural communities are shown to be undergoing dramatic and non-cyclical change. Criteria are defined to identify rural counties vulnerable to further economic losses and include: dependence on agriculture for jobs, inadequate off farm income, population losses, declines in residential and commercial property value, and county fiscal crises due to loss of the tax base, delinquincies, and additional federal and state program changes and cutbacks. Social and economic distress are so extensive as to overwhelm conventional emergency intervention efforts to provide food, shelter, access to health care, and professional counseling. Peer support programs have been found to be effective at reaching farm families and helping them seek out the assistance of farm financial advisors, counselors, food shelves, and public assistance. Emerging attempts to link politically contending parties are discussed, specifically the Reinvest in Minnesota Coalition and the Rural Strategy Task Force consisting of major farm, church, and lending organizations. A strategy process and stakeholder analysis for local communities are presented together with recommendations for action that include creating a rural trend watch capability.
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    Fire technology 22 (1986), S. 1-2 
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    Fire technology 22 (1986), S. 3-3 
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    Fire technology 22 (1986), S. 4-4 
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    Fire technology 22 (1986), S. 5-13 
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    Keywords: Foamed plastic insulation ; full scale room burn ; room fire severity ; flashover time ; normalized heat load
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    Topics: Architecture, Civil Engineering, Surveying
    Notes: Abstract The results of a series of full scale room burn experiments with foamed plastic insulation in two walls indicate that the severity of room fires as characterized by the normalized heat load does not appear to be increased by the addition of foamed plastic insulation.
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    Fire technology 22 (1986), S. 45-53 
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    Keywords: Fire growth ; mass loss rate ; heat release ; radiant flux ventilation ; visibility ; smoke transfer
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    Topics: Architecture, Civil Engineering, Surveying
    Notes: Abstract In the November 1985 issue ofFire Technology, the authors presented prediction methods for estimating fire growth in compartments. Here they provide an example of the use of those methods.
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    Fire technology 22 (1986), S. 14-32 
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    Keywords: Computer facility ; fire loss ; fire protection ; halon ; smoke detectors ; VESDA ; nephelometer ; airflow effects ; spacing ; smoldering ; duct sampling ; pipework sampling
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying
    Notes: Abstract A recent fire in a computer center in Canberra, Australia, prompted an investigation of the installed smoke detection system. The opportunity was also taken to evaluate alternate detection equipment in the actual center under operational conditions. One device tested was VESDA, a new highly sensitive smoke detector developed in Australia for clean occupancies such as computer rooms and telephone exchanges. Details of the test program and the effects of high room airflows on all forms of detectors are presented. The effectiveness of VESDA in giving very early warning of fire is demonstrated.
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    Fire technology 22 (1986), S. 91-91 
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