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  • 1
    Electronic Resource
    Electronic Resource
    Diffusion-influenced controlled reaction in an inhomogeneous medium: Small concentration of reagents (2000)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 112 (2000), S. 8495-8501 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We report a computer simulation study of diffusion influenced reactions in a disorder medium constituting by immobile spherical obstacles when the concentration of reagents is smaller than the concentration of obstacles. We found that the compartmentalization of the embedding medium leads to a strong decrease of the rate of the first collision between reagents and a strong increase of the rate of recollision after a no-reactive encounter. The behavior of the full rate of reaction depends on the probability that a collision leads to reaction (value of the activation energy) and on the relationship between the decrease of the rate of collision and the increase of the rate of recollision. Thus, totally diffusion controlled reactions are always unfavored in these mediums, while partially diffusion controlled reactions with very high activation energy are more favored in mediums with a bigger degree of compartmentalization. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.481452
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  • 2
    Electronic Resource
    Electronic Resource
    Nucleation and annihilation of magnetic vortices in submicron-scale Co dots (2000)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 87 (2000), S. 1395-1401 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We describe experiments on arrays of polycrystalline Co structures fabricated by interference lithography. The dots are thin (15–40 nm), submicron in size, and are patterned with a uniaxial, in-plane, shape anisotropy axis. We use magnetic force microscopy (MFM) in the presence of an applied field to directly observe magnetic reversal in the dots. These experiments reveal that reversal occurs predominantly through the nucleation and annihilation of a single magnetic vortex in each dot. Hysteresis loop measurements indicate that the vortices are stable over a wide range of applied fields and that the limits of this range depend on the size and thickness of the dots. Using the MFM data, we determine the statistical distribution of the single-vortex nucleation field for several different arrays. We attribute the observed variance to the random orientation of the polycrystalline grains. Finally, we show that the average vortex nucleation and annihilations fields are linearly correlated to the demagnetization field of a uniformly magnetized structure. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.372026
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  • 3
    Electronic Resource
    Electronic Resource
    Histological alterations in the liver of sea bream, Sparus aurata L., caused by short- or long-term feeding with vegetable oils. Recovery of normal morphology after feeding fish oil as the sole lipid source (2004)
    Oxford, UK : Blackwell Science Ltd
    Journal of fish diseases 27 (2004), S. 0 
    Details
    ISSN: 1365-2761
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: This study evaluated the effects of fish oil (FO) replacement by vegetable oils [soybean oil (SO), rapeseed oil (RO), linseed oil (LO)] and subsequent feeding with FO on the liver morphology of sea bream. A short-term trial (3 months) and long-term trial (6 months) were carried out feeding sea bream with the following experimental diets: FO100%; SO60% + FO40%; RO60% +FO40%; LO60% + FO40%; SO + RO +LO60% + FO40%. Finally, all groups from the long-term trial were fed with FO100% for 95 days (washout period). Liver samples were taken for histological and biochemical studies. In both the short- and long-term trials, livers of sea bream fed LO60% and SO + RO + LO60% showed a similar hepatic morphology to that observed in fish fed FO100%. In contrast, sea bream fed SO60% showed an intense steatosis, with foci of swollen hepatocytes containing numerous lipid vacuoles. After the washout period, a considerable reduction of the cytoplasmic vacuolation and the lipid vacuole accumulation were observed in the livers of fish fed the different experimental diets. The results of this study suggested that the type of non-essential fatty acid, characteristic of vegetable oils, induces the appearance of steatosis in the following order: linoleic acid 〉 linolenic acid 〉 oleic acid. However, the liver alterations found during the experimental periods with vegetable oils are reversible when the fish are re-fed with a balanced diet (FO100%), indicating the non-pathological character of these histological changes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2761.2004.00572.x
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  • 4
    Electronic Resource
    Electronic Resource
    cDNA-AFLP analysis of differential gene expression during the interaction between sugarcane and Puccinia melanocephala (2004)
    Oxford, UK : Blackwell Publishing Ltd
    Plant breeding 123 (2004), S. 0 
    Details
    ISSN: 1439-0523
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Amplified fragment length polymorphism (AFLP) display of complementary DNA (cDNA) was used to identify genes from sugarcane somaclones expressed during the interaction with Puccinia melanocephala. The isolated transcript-derived fragments (TDFs) correspond to genes involved in the resistance process. Genes related with recognition, signalling and general response were identified through BLAST search. This work constitutes the first report of genes activated during the P. melanocephala-sugarcane interaction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1439-0523.2004.00935.x
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  • 5
    Electronic Resource
    Electronic Resource
    Anaesthetic management in a case of a type IV laryngotracheo-oesophageal cleft (2003)
    Oxford, UK : Blackwell Science Ltd
    Pediatric anesthesia 13 (2003), S. 0 
    Details
    ISSN: 1460-9592
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Summary We report the case of a newborn baby with a type IV laryngotracheo-oesophageal cleft and the anaesthetic management during the rigid bronchoscopy that was performed at 5 days of age. After anaesthetic induction with sevoflurane and atropine, the child was maintained with sevoflurane 2–2.5% and remifentanil at an infusion rate of 0.5 μg·kg−1·min−1. Ventilation was managed through the lateral port of the bronchoscope. The patient breathed sevoflurane and oxygen/N2O spontaneously via a Jackson-Rees circuit. To prevent the stomach from filling up with anaesthetic gases, a Foley catheter was placed orally into the stomach. The Foley balloon was inflated and retracted until it sealed the gastro-oesophageal junction. Tracheal intubation was performed after bronchoscopy to allow suture of the stomach into two chambers. Oxygenation was adequate with no air leakage, with spontaneous ventilation. The Foley catheter was removed afterwards and the patient awakened. We review the literature on different ways of managing the airway in these cases and protecting it from gastric aspiration during ventilation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1460-9592.2003.01043.x
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  • 6
    Electronic Resource
    Electronic Resource
    Nature of the Inactivation Curves of Bacillus Pumilus Spores Heated Using Non-isothermal and Isothermal Treatments (2002)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 67 (2002), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: : Isothermal and non-isothermal heat resistance studies were carried out on Bacillus pumilus spores. The non-isothermal study revealed a non-linear behavior of the survivor curve, which was revealed as a tail after an isothermal study. Results indicated that the spores obtained by isolating cells from colonies of the tail section were more heat resistant than the original ones (D104°c= 0.15 and 1.9 min for spores from the original population and from the tail, respectively). Application of the Weibull distribution model to analyze the tail produced good results at the 3 temperatures studied. Nevertheless, when the model was applied to curves having both concave downward and concave upward sections a poor result was obtained, with an accuracy factor greater than 1.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.2002.tb10675.x
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  • 7
    Electronic Resource
    Electronic Resource
    PCR-RFLP Analysis of the Internal Transcribed Spacer (ITS) Region for Identification of 3 Clam Species (2001)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 66 (2001), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Restriction site analysis of the internal transcribed spacer (ITS) region amplified by the polymerase chain reaction (PCR) was used for the specific identification of 3 clam species: Ruditapes decussatus (grooved carpet shell), Venerupis pullastra (pullet carpet shell), and Ruditapes philippinarum (Japanese carpet shell). PCR amplification using primers based on nucleotide sequences of Mytilus ITS regions produced a fragment of 1195 bp in R. decussatus, 1074 bp in V. pullastra, and 1188 bp inR. philippinarum. Digestion of the PCR products with endonucleases HinfI and Rsa I, followed by agarose gel electrophoresis of the digested products, yielded specific restriction profiles that enabled direct visual identification of the species analyzed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.2001.tb04617.x
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  • 8
    Electronic Resource
    Electronic Resource
    Anaemia of renal failure: Differences between continuous ambulatory peritoneal dialysis and haemodialysis (2000)
    Melbourne, Australia : Blackwell Science Pty
    Nephrology 5 (2000), S. 0 
    Details
    ISSN: 1440-1797
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: A cross-sectional study was performed to assess a series of parameters, especially those related to iron status, that may account for differences in the anaemia of patients treated with continuous ambulatory peritoneal dialysis (CAPD) and haemodialysis (HD). Patients on CAPD (n = 37) and on haemodialysis (n = 27) were selected on the basis of clinical stability and absence of factors that may interfere with iron metabolism. Parameters measured included routine haematological and biochemical profile; serum iron metabolism (serum iron, transferrin saturation capacity, transferrin saturation index, serum ferritin); erythrocyte ferritin; bone marrow erythroid components and semiqualitative analysis of iron deposits in the bone marrow. The CAPD patients showed higher levels of haemoglobin and transferrin saturation capacity as well as lower serum ferritin than patients on haemodialysis. In the bone marrow, CAPD patients had a higher percentage of red blood cells and in those with low iron-containing macrophages a higher percentage of sideroblasts than the haemodialysis group. Erythrocyte ferritin levels were similar in both groups. These data suggest more efficient iron metabolism in CAPD patients than in patients on haemodialysis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1440-1797.2000.00506.x
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  • 9
    Electronic Resource
    Electronic Resource
    Growth and survival of young turbot (Scophthalmus maximus L.) produced with cryopreserved sperm (2002)
    Oxford, UK : Blackwell Science Ltd
    Aquaculture research 33 (2002), S. 0 
    Details
    ISSN: 1365-2109
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: This study assessed the growth and survival over a year of two groups of 4-month-old turbot Scophthalmus maximus (L.) derived from artificial fertilization with fresh (FG) and cryopreserved sperm (CG). Growth in both groups, measured monthly in terms of length and weight, were compared. Survival was also recorded. No significant differences were found when we compared weight and length data in both groups. Growth rates were similar between FG and CG young turbot during 1 year. Likewise, the same survival rate (92.2%) was found in both groups. Our results show the good survival and growth of young turbot obtained from cryopreserved sperm, and confirm the cryopreservation technique as a useful tool for raising turbot for commercial purposes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2109.2002.00703.x
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  • 10
    Electronic Resource
    Electronic Resource
    Larval growth of turbot, Scophthalmus maximus (L.) produced with fresh and cryopreserved sperm (2001)
    Oxford, UK : Blackwell Science Ltd
    Aquaculture research 32 (2001), S. 0 
    Details
    ISSN: 1365-2109
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: The present paper assesses the fertilization and hatching rates, as well as the growth, of larvae obtained from four artificial fertilizations (AF) using fresh and cryopreserved sperm of the turbot Scophthalmus maximus (L.). Larvae growth in both sperm groups, measured in terms of length and weight at culture days 0, 7, 14 and 31, are compared, as well as their growth rates. The two groups' fertilization and hatching rates were not significantly different. Likewise, no significant differences in length and wet weight of 7- and 14-day-old larvae were found using fresh and cryopreserved sperm; however, significant differences were found in 31-day-old larvae, which were more attributable to the variability inherent in larval turbot culture, and to variability in the reproductive specimens used in our study, than to the type of sperm employed. These results indicate that the type of sperm used in artificial fertilization, i.e. fresh or cryopreserved, is not a determining factor, either for fertilization and hatching, or for subsequent larval development. Our results also confirm once again the high quality of cryopreserved turbot sperm, and its usefulness in commercial hatcheries.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2109.2001.00541.x
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