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  • 1
    Electronic Resource
    Electronic Resource
    Stability of vitamin A palmitate in cosmetic emulsions: influence of physical parameters (1994)
    Oxford, UK : Blackwell Publishing Ltd
    International journal of cosmetic science 16 (1994), S. 0 
    Details
    ISSN: 1468-2494
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The aim of this work was to verify if a close relationship exists between the physical stability of an emulsion and the chemical stability of vitamin A palmitate included in it. Oil-in-water cosmetic emulsions with high viscoelastic properties were prepared, and their rheological behaviour was investigated in oscillatory conditions. The stability of each sample was verified in high-temperature stress conditions: periodical checks of physical parameters and chromatographic analysis of vitamin A were performed during storage. Results show that the chemical stability of vitamin A palmitate strictly depends on the physical stability of the formulation and in particular on the presence of a coherent gel-like structure in the external phase of the emulsion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1467-2494.1994.tb00092.x
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  • 2
    Electronic Resource
    Electronic Resource
    Chemico-physical and functional properties of inorganic sunscreens in cosmetic products (1994)
    Oxford, UK : Blackwell Publishing Ltd
    International journal of cosmetic science 16 (1994), S. 0 
    Details
    ISSN: 1468-2494
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: This paper reports preliminary results of a study carried out on liquid crystal emulsions added to three different inorganic sunscreens: ultrafine zinc oxide, ultrafine titanium dioxide (inorganic-treated) and ultrafine titanium dioxide (organic-treated hydrophobically).The aim of the work was to investigate the influence of chemico-physical properties of inorganic sunscreens on the microstructure of cosmetic emulsions. The study was carried out using three different techniques: rheological measurements performed in dynamic conditions, to study the homogeneity of samples and their structural features; dispersion of powders in emulsions by optical microscopy and SEM/EDX analysis; and functionality of emulsions by UV spectroscopy, with adhesive tape as substrate.Results show that the different chemico-physical properties of the micropigments lead to different interactions with emulsion components; these interactions may affect the functionality and microstructure of the whole system, with loss of stability.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1467-2494.1994.tb00101.x
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  • 3
    Electronic Resource
    Electronic Resource
    Neuroendocrine Cells in the Gastrointestinal Tract of Wild Boar (1998)
    Oxford, UK : Blackwell Publishing Ltd
    Anatomia, histologia, embryologia 27 (1998), S. 0 
    Details
    ISSN: 1439-0264
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The presence and the distribution of neuroendocrine cells in the gastrointestinal tract of adult wild boar were investigated. The endocrine cells have been identified by means of immunocytochemical techniques using antibodies against serotonin, gastrin, somatostatin, cholecystokinin (CCK), met-enkephalin (MET-ENK), gastric-inhibitory peptide (GIP) and glucagon. The number of positive cells for each antiserum in each region was evaluated. Results were compared with data present in the literature and obtained previously by us and other authors in swine and domestic mammals (Ceccarelli et al., 1985, 1987, 1990, 1991, 1995; Capella and Solcia, 1972; Domeneghini and Castaldo, 1981; Peranzi and Lehy, 1984; Krause et al., 1985).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1439-0264.1998.tb00211.x
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  • 4
    Electronic Resource
    Electronic Resource
    A lectin histochemical study of the oesophagus of shi drum (2004)
    Oxford, UK; Malden, USA : Blackwell Science Ltd/Inc.
    Journal of fish biology 64 (2004), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The saccharide composition of surface and secretion glycoconjugates in the oesophagus of Umbrina cirrosa was examined by means of lectin histochemistry. Mucous cells showed the presence of N-acetylgalactosamine, N-acetylglucosamine and sialic acid linked to the dimer galactosyl(β1→3) N-acetylgalactosamine. Columnar epithelial cells had a positive reaction with almost all the lectins employed, located in the supranuclear region and in the cell coat. The presence of abundant and various glycoconjugates in the secretions of shi drum oesophagus was correlated to the absence of salivary glands in fishes in general.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.2004.00326.x
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  • 5
    Electronic Resource
    Electronic Resource
    Glycoconjugate distribution in gastric fundic mucosa of Umbrina cirrosa L. revealed by lectin histochemistry (2005)
    Oxford, UK; Malden, USA : Blackwell Publishing Ltd/Inc.
    Journal of fish biology 66 (2005), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The stomach of adult shi drum Umbrina cirrosa was investigated using a battery of nine horseradish peroxidase-conjugated lectins combined with enzymatic treatment, in order to distinguish glycoconjugate sugar residues. Epithelial cells showed the presence of galactosyl(β1→4)N-acetylglucosamine, mannose, N-acetylgalactosamine, N-acetylglucosamine, fucose and sialic acid-galactosyl(β1→3)N-acetylgalactosamine residues. Gastric pits had similar sugar residues with the exception of N-acetylgalactosamine which was less diffused. Gastric glands were characterized by the presence of glycoconjugates containing galactosyl(β1→3)N-acetylgalactosamine, N-acetylglucosamine, galactosyl(β1→4) N-acetylglucosamine, N-acetylgalactosamine and a small amount of sialic acid linked to N-acetylgalactosamine.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.0022-1112.2005.00596.x
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  • 6
    Electronic Resource
    Electronic Resource
    Immunohistochemical Localization of Endometrial Oestrogen and Progesterone Receptors in the Cow (1999)
    Oxford, UK : Blackwell Science, Ltd
    Anatomia, histologia, embryologia 28 (1999), S. 0 
    Details
    ISSN: 1439-0264
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The presence and distribution of oestrogen and progesterone receptors have been investigated by means of immunohistochemical procedures in the uterus of two groups of cows: the first group underwent superovulatory hormonal treatment while the second group was used as a control group. After the immunohistochemical study no differences regarding the presence and distribution of hormone receptors seemed to be apparent between the two groups, so it was concluded that the topographical distribution and staining intensity of hormone receptors seem to be unaffected by hormonal superovulatory treatment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1439-0264.1999.00227.x
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  • 7
    Electronic Resource
    Electronic Resource
    Presence and Distribution of Neuroendocrine Cells in the Gastroenteropancreatic Endocrine System of Fallow Deer Foetuses (1999)
    Oxford, UK : Blackwell Science, Ltd
    Anatomia, histologia, embryologia 28 (1999), S. 0 
    Details
    ISSN: 1439-0264
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The gastroenteropancreatic endocrine system was studied in 11- and 17-week-old fallow deer foetuses using an immunocytochemical technique. In the gastrointestinal tract, gastrin-, serotonin-, somatostatin- and cholecystokinin-containing cells were found; their frequency and distribution were also determined. Anti-glucagon and anti-insulin antibodies did not stain any cells along the gut. In the pancreas, somatostatin-, pancreatic polypeptide-, insulin- and glucagon-immunoreactive cells were detected. The different distribution and number of neuroendocrine cells, in the two investigated stages of foetal life, are discussed. Data obtained in this study were compared with those published in a previous study on the gastrointestinal system of the adult fallow deer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1439-0264.1999.00219.x
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  • 8
    Electronic Resource
    Electronic Resource
    Complex Carbohydrate Histochemistry and Ultracytochemistry of the Sheep Lacrimal Gland (2000)
    Oxford, UK : Blackwell Science, Ltd
    Anatomia, histologia, embryologia 29 (2000), S. 0 
    Details
    ISSN: 1439-0264
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The chemical content of the secretion of the sheep lacrimal gland was analysed at the light and electron microscope levels by applying histochemical techniques and an ultrastructural histochemical method (periodic acid, thiocarbohydrazide and silver proteinate). Mucosubstance histochemistry demonstrated acidic glycoconjugates, mainly sulphated, in the mucous and seromucous glandular cells and in the apical portion of the cells lining the terminal ducts. Moreover, secretory granules, stained with PA-TCH-SP, showed a different localization of the reaction product. The presence of lysozyme was also found in the glandular serous cells. These histochemical studies demonstrate that the secretion of sheep lacrimal glands is mixed, having serous, mucous and seromucous components, and that an excellent correlation exists between the secretory granule substructure and glycoprotein localization.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1439-0264.2000.00229.x
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  • 9
    Electronic Resource
    Electronic Resource
    Histology and Ultrastructure of the Gut of the Tilapia (Tilapia spp.), a Hybrid Teleost (1998)
    Oxford, UK : Blackwell Publishing Ltd
    Anatomia, histologia, embryologia 27 (1998), S. 0 
    Details
    ISSN: 1439-0264
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The morphology of the intestine has been studied in a species of warm water fish, Tilapia spp., a hybrid teleost of notable economic importance. Light and electron microscope results show that the intestine is a relatively undifferentiated muscular tube lined with a simple columnar epithelium interspersed with goblet cells. The proximal region has a greater surface area, manifested by elongated mucosal ridges. The enterocytes are covered apically with uniform microvilli and exhibit the typical ultrastructural features of pinocytosis, namely extensive invaginations of the luminal plasma membrane and massive accumulation of vesicles in the apical cytoplasm. The distal intestine mucosa is thinner and less elaborately folded and consists of columnar cells with shorter and sparser microvilli. Their supranuclear cytoplasm contains abundant clear vacuoles. Numerous endocrine cells can also be seen. Regional cellular ultrastructural features are correlated with digestive functions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1439-0264.1998.tb00162.x
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  • 10
    Electronic Resource
    Electronic Resource
    Ultrastructural Study on the Stomach of Tilapia spp (Teleostei) (1997)
    Oxford, UK : Blackwell Publishing Ltd
    Anatomia, histologia, embryologia 26 (1997), S. 0 
    Details
    ISSN: 1439-0264
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: An ultrastructural study has been made of gastric mucosa of a teleostean fish, Tilapia spp. The cytological features of the surface mucous cells, mucous neck cells, glandular cells and endocrine cells are described. The surface mucous cells, identified by their superficial localization, are characterized by apical granules. The mucous neck cells are distinguished by the appearance of their mucous granules and their localization between surface mucous cells and glandular cells. The gastric glands contain only one form of cell whose fine structure is similar to cells that secrete hydrochloric acid.Physiological implications of some ultrastructural features are also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1439-0264.1997.tb00144.x
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