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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food processing and preservation 15 (1991), S. 0 
    ISSN: 1745-4549
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: The L number, a dimensionless number that describes the ratio of the moisture permeance of a food substance to that of a coating material, was used to predict the effectiveness of available edible coating materials to prevent moisture migration from or into coated foods. A computer model was developed using the finite difference method to simulate moisture migration through coated food materials. the results indicated that when the L number is smaller than 0.04, the main resistance to moisture transfer for a coated food material is the diffusion of moisture within the food material itself. On the other hand, if the L number is larger than 4, the main resistance to moisture transfer is the permeance of the coating material. the application of this approach to predict the effectiveness of different coating materials for various dried foods is presented.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 51 (1986), 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: A finite element model is described that can be used for predicting moisture transfer in mixed food products during storage. Two of three components (raisins, roasted peanuts, banana chips, and roasted almonds) were packed in a well sealed cup. The rate of moisture transfer between the components was assumed to be limited by the component with the Lowest effective diffusion coefficient divided by the square of half of smallest dimension (i.e., DeffLo2) value. The surface moisture content of the rate determining component was assumed to be in equilibrium with the other component(s) at all times. The mean error between the experimental and predicted moisture values with time ranged from 0.28% to 0.84% as a percentage of moisture content.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food process engineering 8 (1986), S. 0 
    ISSN: 1745-4530
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Working isotherms for processed wild rice and desorption isotherms for unprocessed wild rice were determined at temperatures ranging from 10 to 43.5°C. the constants for the Guggenheim-Anderson-DeBoer (GAB), Day and Nelson, Chen and Clayton and modified Halsey equations were determined by using a nonlinear optimization technique. the GAB equation showed extremely good fit to the experimental data (less than 5% error). the diffusion coefficients for moisture transport in both broken and whole processed wild rice and for unprocessed wild rice samples were determined at room temperature. the processed broken wild rice kernels had an effective diffusion coefficient of 2.66 × 10−9 m2/h, whereas the effective diffusion coefficient was 7.08 × 10−10m2/h for the processed whole wild rice kernels. Unprocessed wild rice had moderate effective diffusivity (1.4 × 10−9 m2/h). These results predicted quite well the equilibrium water activities and time to equilibrium of wild rice-white rice mixtures using both analytical methods and the finite element method. the transfer of moisture to or from packaged wild rice was also illustrated for different distribution systems.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Calcified tissue international 2 (1968), S. 271-285 
    ISSN: 1432-0827
    Keywords: Growth ; Skull ; Face ; Cranial sutures ; Vital staining
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Description / Table of Contents: Résumé Les auteurs ont étudié à l'aide de colorants vitaux à base d'acétate de Plomb, administrés à des lapins blancs de Nouvelle-Zélande et âgés de plus de trente cinq jours, le mode et la rapidité de formation des os de la voûte du crâne. Leurs résultats sont présentés et comparés à ceux obtenus par l'étude de la fixation osseuse du calcium radio-actif (45Ca) en des points homologues. Le mode de la croissance est différent pour chaque type de suture. L'allongement de la voûte du crâne se fait rapidement dans le sens antéropostérieur en regard du museau, en particulier au niveau des sutures: internasale et métopique, alors que la croissance est beaucoup moins évidente au niveau de la suture sagittale proprement dite. Il existe par ailleurs une croissance osseuse active à partir de l'os nasal en regard de la suture naso pré-maxillaire; par contre les auteurs constatent une résorbtion osseuse au niveau de la suture parieto pétro squameuse. L'accroissement de l'epaisseur de la voûte crànienne paraît être la conséquence du développement de l'os frontal et du pariétal: cette croissance s'effectuant plus aux dépens de la face exocranienne que de la face endocranienne de chacum de ces os. Au niveau des os de la voûte du crâne il existe une correspondance satisfaisante entre: les résultats des mesures linéaires utilisant les striés de plomb et ceux établis à partir de la fixation du45Ca, en particulier lorsque celui-ci est administré trois à six jours avant que l'animal ne soit sacrifié.
    Abstract: Zusammenfassung Bildungsweise und-geschwindigkeit einzelner Schädelknochen wurden anhand der Bleiacetat-Vitalfärbung bei 13 weißen Neuseeländer-Kaninchen vom 35. Lebenstag an untersucht. Die Resultate wurden jenen der45Ca-Aufnahme an bilateral vergleichbaren Stellen gegenübergestellt. Die Wachstumsmuster waren von Naht zu Naht verschieden. Es ließ sich ein rapides Längenwachstum des Schädeldaches in Richtung Schnauzengegend feststellen. Im sagittalen Nahtkomplex wurde ein aktives Wachstum an den Oberflächen der Verwachsungslinien der intranasalen und frontalen Nähte beobachtet, während die sagittalen Knochennähte ein viel geringeres Wachstum zeigten. Aktives Wachstum konnte auch an den Oberflächen der Knochennähte des Nasenbeins an der nasoprämaxillären Verwachsungsstelle beobachtet werden, während in der squamösen Naht an der Oberfläche des Scheitelbeins eine Resorption stattfand. Die Verdickung des Schädelgewölbes schien weniger eine Folge des Wachstums der endocranialen, als vielmehr der ectocranialen Oberflächen des Stirn- und Scheitelbeines zu sein. Es wurde eine gute Übereinstimmung zwischen linearen Messungen der Blei-Linien und der45Ca-Aufnahme in den Knochen des Schädeldaches festgestellt, besonders wenn45Ca 3 oder 6 Tage bevor man die Tiere opferte gegeben wurde.
    Notes: Abstract The mode and the rate of formation of individual bones in the cranium were studied by vital staining with lead acetate in 13 New Zealand white rabbits beginning at 35 days of age. These evaluations were compared with45Ca uptake at bilaterally comparable sites. The growth patterns differed from one suture to another. Elongation of the cranial vault in the anterior direction in the snout area was rapid. In the sagittal suture complex, active growth was observed on the intrasutural surfaces of the internasal and metopic sutures, while much less growth was taking place in the sagittal suture. Active growth also was taking place at the intrasutural surface of the nasal bone at the naso-premaxillary suture while resorption was found on the surface of the parietal bone in the squamosal suture. Increase in thickness of the cranial vault appeared to be the result of accretion on the ectocranial and to a lesser extent on the endocranial surfaces of the frontal and parietal bones. Good correlations between the linear measurement with the lead lines and45Ca uptake were observed in the bones of the cranial vault, especially when45Ca was administered 3 or 6 days before sacrifice.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Calcified tissue international 2 (1968), S. 286-295 
    ISSN: 1432-0827
    Keywords: Growth ; Skull ; Face ; Cranial sutures ; Vital staining
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Description / Table of Contents: Résumé Les auteurs ont injecté à de jeunes lapins blancs de Nouvelle-Zélande, mâles, des doses variables de: Rouge Alizarine S, bleu Trypan, Chlortetracycline ou Ca45. Ils ont étudié l'influence de ces différents facteurs sur la croissance osseuse à l'échelle microscopique, en comparaison avec les résultats fournis par la méthode utilisant des colorants vitaux à base d'acétate de plomb. Le45Ca s'est revelé sans effect. Par contre les autres substances entraînent une inhibition temporaire de la croissance; celle-ci est la plus marquée après administration de Rouge Alizarine S et minimum avec la Chlortetracycline; elle est d'autant plus nette que la dose administrée est plus forte. A la dose de 100 mg/kg le Rouge Alizarine S réduit seulement la croissance osseuse; celle-ci est stoppée par une dose de 150 mg/kg. De même une dose de 50 mg/kg de Chlortetracycline ou de 100 mg/kg de Bleu Trypan ralentit la croissance osseuse; une dose de 350 mg/kg de Bleu Trypan bloque toute activité ostéogénique. L'effet de la Chlortetracycline est très transitoire, celui des autres substances moins rapidement reversible.
    Abstract: Zusammenfassung Verschiedene Dosen von Alizarinrot S, Trypanblau, Chlortetracyclin und45Ca wurden jungen, männlichen, weißen Neuseeländer-Kaninchen injiziert. Der Einfluß dieser Substanzen auf das Knochenwachstum wurde anhand der Bleiacetat-Vitalfärbung im mikroskopischen Präparat untersucht. Vergleiche auf Grund des zwischen den Bleiacetat-Linien liegenden Abstandes zeigten, daß45Ca keine hemmende Wirkung auf das Knochenwachstum ausübt. Die stärkste temporäre Blockierung des Knochenwachstums wurde durch Alizarinrot S, die schwächste durch Chlortetracyclin hervorgerufen. Je höher die durchschnittlich gegebene Dosis Alizarinrot S, Trypanblau und Chlortetracyclin war, desto stärker machte sich deren hemmender Einfluß auf das Knochenwachstum bemerkbar. Bei einer Gabe von 100 mg/kg Alizarinrot S wurde das Knochenwachstum eingeschränkt, während 150 mg/kg einen kompletten Stillstand desselben bewirkten. Eine Dosis von 100 mg/kg Trypanblau und von 50 mg/kg Chlortetracyclin ließ die Knochenbildung abnehmen, während 350 mg/kg Trypanblau die osteogenetische Aktivität vollständig blockierten. Die Verzögerung des Knochenwachstums durch Chlortetracyclin war rasch überwunden, wogegen sich das normale Knochenwachstum nach Alizarinrot S- und Trypanblau-Gaben nur langsam wieder einstellte.
    Notes: Abstract Various doses of alizarin red S, trypan blue, chlortetracycline and45Ca were injected into young male New Zealand white rabbits. The influence of these agents on bone growth was studied at the microscopic level by comparison with vital staining by lead acetate. From evaluation of bone growth on the basis of the distance between the lead acetate lines,45Ca had no adverse effect; temporary inhibition of bone growth was the largest with alizarin red S and least with chlortetracycline. The higher the average level of alizarin red S, trypan blue and chlortetracycline the stronger was the inhibitory influence on bone growth. Alizarin red S at 100 mg/kg reduced the rate of bone growth and at 150 mg/kg caused complete cessation of bone growth. Trypan blue at 100 mg/kg and 50 mg/kg of chlortetracycline caused a decrease in bone formation and 350 mg/kg of trypan blue stopped osteogenetic activity. The retardation by chlortetracycline was quickly overcome but after alizarin red S and trypan blue, normal bone growth was regained slowly.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 25 (1991), S. 485-498 
    ISSN: 0021-9304
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Notes: A calcium phosphate cement, Grossman sealer, and Sargenti N2 were compared under conditions where root canals of monkey incisors were deliberately overfilled and the apical tissue responses were evaluated histologically. The periapical tissues exposed to Sargenti N2 revealed severe irritation at all times through the 6-month experimental period. The reactions to Grossman sealer were milder but persisted throughout the observation period. The calcium-phosphate-cement treated animals showed mild tissue irritation after 1 month, but thereafter the adverse tissue reactions were minimal. New bone formation adjacent to the cement was also observed. These results point to the possibility that calcium phosphate cement might be used in simplified endodontic procedures. The compatibility of calcium phosphate cement with the periapical tissue suggests that the cement may have other applications in dentistry and medicine.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
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