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  • 1
    Electronic Resource
    Electronic Resource
    The role of husband's and wife's economic activity status in the demand for children
    Amsterdam : Elsevier
    Journal of Development Economics 25 (1987), S. 329-352 
    Details
    ISSN: 0304-3878
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Political Science , Economics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0304-3878(87)90089-7
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  • 2
    Electronic Resource
    Electronic Resource
    cDNA cloning of a novel cell adhesion protein expressed in human squamous carcinoma cells
    Amsterdam : Elsevier
    Biochemical and Biophysical Research Communications 166 (1990), S. 984-992 
    Details
    ISSN: 0006-291X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0006-291X(90)90908-6
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  • 3
    Electronic Resource
    Electronic Resource
    Extracellular expression of human epidermal growth factor encoded by an Escherichia coli K-12 plasmid stabilized by the ytl2-incR system of Salmonella typhimurium (1998)
    Springer
    Journal of industrial microbiology and biotechnology 21 (1998), S. 31-36 
    Details
    ISSN: 1476-5535
    Keywords: Keywords: hEGF; plasmid pSLT; ytl2-incR stabilization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A plasmid stabilization system, active in high copy-number plasmids, was cloned from the large resident plasmid, pSLT, of Salmonella typhimurium. The ytl2 gene, together with a 249-bp region (termed incR) downstream of the gene, imparted 〉104-fold stability to a pBR322-based plasmid. The ytl2-incR region was then used to stabilize a recombinant plasmid carrying the human epidermal growth factor gene (with the Escherichia coli K-12 ompA signal sequence), behind the lacUV5 promoter. In shake flask tests to optimize expression of human epidermal growth factor, loss of recombinant plasmid was 〈1% when growth (both before and after induction with isopropyl-β-d-galactopyranoside) took place even in the absence of antibiotic selection, and the specific activity of secreted human epidermal growth factor was ca 20 μg per 108 cells at harvest, compared to a figure of ca 3 μg per 108 cells when a comparable plasmid, but devoid of the ytl2-incR region, was employed, as outgrowth of plasmid-free cells after induction severely compromised the specific activity of the secreted product.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/sj.jim.2900557
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  • 4
    Electronic Resource
    Electronic Resource
    Ultrastructural correlation of water reabsorption in isolated rat cauda epididymidis (1978)
    Springer
    Cellular and molecular life sciences 34 (1978), S. 485-487 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Electron microscopic study was made on the water reabsorption of the epithelial cells of the rat cauda epididymidis. It was shown that when the epididymal duct was reabsorbing water at a maximal rate, widely dilated intercellular spaces were seen. It is suggested that the standing gradient model of water reabsorption first proposed for the gall bladder may also operate in the cauda epididymidis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01935943
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  • 5
    Electronic Resource
    Electronic Resource
    Solvability of systems of polynomial congruences modulo a large prime (1999)
    Springer
    Computational complexity 8 (1999), S. 227-257 
    Details
    ISSN: 1420-8954
    Keywords: Keywords. Polynomial congruence, algebraic set, finite field, algorithm.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract. We consider the following polynomial congruences problem: given a prime p, and a set of polynomials $ f_1,\ldots,f_m \in {\Bbb F}_p[x_1,\ldots,x_n] $ of total degree at most d, solve the system $ f_1 = \cdots = f_m = 0 $ for solution(s) in $ {\Bbb F}^n_p $ . We give a randomized algorithm for the decision version of this problem. For a fixed number of variables, the sequential version of the algorithm has expected time complexity polynomial in d, m and log p; the parallel version has expected time complexity polylogarithmic in d, m and p, using a number of processors, polynomial in d, m and log p. The only point which prevents the algorithm from being deterministic is the lack of a deterministic polynomial time algorithm for factoring univariate polynomials over $ {\Bbb F}_p $ .
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s000370050029
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  • 6
    Electronic Resource
    Electronic Resource
    The distribution of benefits among public housing tenants in Hong Kong and related policy issues
    Amsterdam : Elsevier
    Journal of Urban Economics 23 (1988), S. 1-20 
    Details
    ISSN: 0094-1190
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Economics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0094-1190(88)90002-2
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  • 7
    Electronic Resource
    Electronic Resource
    Ultrastructural and cytochemical studies of the effects of prolactin on the lateral prostate and the seminal vesicle of the castrated guinea pig (1992)
    Springer
    Cell & tissue research 270 (1992), S. 105-112 
    Details
    ISSN: 1432-0878
    Keywords: Prolactin ; Lateral prostate ; Seminal vesicle ; Thiamine pyrophosphatase ; Radioimmunoassay ; Morphometry ; Guinea pig (Dunkin Hartley)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Administration of ovine prolactin to castrated guinea pigs for 2 weeks induced hypertrophy of secretory cells in the lateral prostate when compared with the castrated controls. This was accompanied by an apparent increase in the number of profiles of granular endoplasmic reticulum and well developed Golgi complexes with dilated cisternae. An increase in the number of low-contrast electron-dense secretory granules was observed 4 weeks after prolactin treatment. In the seminal vesicle, dilatation and degranulation of granular endoplasmic reticulum and an apparent decrease in the number of secretory granules were observed 4 weeks after prolactin administration. Following castration and 2 weeks after prolactin treatment, thiamine pyrophosphatase (TPPase)-reaction product was mainly confined to 1–2 trans cisternae of the Golgi complexes in secretory cells of the lateral prostate and the seminal vesicle. In both glands, a reduction of TPPase activity was observed 2 weeks following prolactin administration, and the reaction product was totally absent after prolonged treatment for 4 weeks. The present study has provided morphological evidence that prolactin is capable of stimulating the secretory function of the lateral prostate while exerting some inhibitory effects on the seminal vesicle of the castrated guinea pig. In both glands, TPPase activity, and hence the process of glycosylation was inhibited after prolactin administration. The results from radioimmunoassay indicated that the action of prolactin on these glands could be a direct effect and not mediated through testosterone.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00381885
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  • 8
    Electronic Resource
    Electronic Resource
    Thiamine pyrophosphatase activity in secretory cells of the lateral prostate and seminal vesicle of normal and castrated guinea pigs and castrates treated with oestradiol (1993)
    Springer
    Journal of molecular histology 25 (1993), S. 77-85 
    Details
    ISSN: 1573-6865
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Ultrastructural localization of thiamine pyrophosphatase (TPPase) activity was studied in secretory cells of the lateral prostate and seminal vesicle of normal and castrated guinea pigs and castrates treated with 17β-oestradiol benzoate. The present study has demonstrated that TPPase reaction product is consistently localized in the three to four trans cisternae of Golgi complexes in both the lateral prostate and the seminal vesicle. The reaction was intense and the reaction product often filled the cisternae completely. After castration there was a decrease in TPPase activity in both glands as revealed by the reduction in the amount of the reaction product which was found mainly in one to two trans cisternae of the regressed Golgi complex. The reaction product changed from a dense to a more particulate or granular pattern or to discrete deposits of high electron-density. Administration of 17β-oestradiol benzoate to the castrates caused changes in the localization and patterns of distribution of TPPase. In the lateral prostate there was an apparent increase in TPPase activity. The reaction product was found in two to four trans cisternae and occasionally in the trans-most cisternae of the dilated Golgi complex. The reaction product appeared as discrete, dense coarse precipitates. In the seminal vesicle TPPase reaction product was consistently found in one to two trans cisternae in cells with larger Golgi complexes. However, almost all cisternae of the smaller Golgi complexes were TPPase-positive. The cytochemicl results of the present study suggest that TPPase activity and possibly the process of glycosylation in secretory cells of the lateral prostate and seminal vesicle may have been affected after castration and after oestradiol administration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00161047
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  • 9
    Electronic Resource
    Electronic Resource
    Characterization of glycoconjugates of guinea pig seminal vesicle by lectin histochemistry (1998)
    Springer
    Journal of molecular histology 30 (1998), S. 447-459 
    Details
    ISSN: 1573-6865
    Keywords: There are no keywords
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract In the present study, the expression of glycoconjugates in the guinea pig seminal vesicle was localized and partially characterized by lectin histochemistry using a battery of 30 different lectins specific for different carbohydrate residues. The results indicate that the glandular epithelium of the guinea pig seminal vesicle exhibits complex glycoconjugates rich in Man, β-GlcNAc, β-Gal, α/β-GalNAc, Fuc and complex NeuAc(α2,6)Gal/GalNAc residues, as shown by its positive reactions to most lectins used. The Golgi region of the luminal secretory epithelial cells expresses a complex glycoconjugate pattern, as shown by its strong reactions to Man-(PSA, GNA), β-GlcNAc-(S-WGA, PWA, DSA, UDA), β-Gal- (RCA-I and -II), α/β-GalNAc-(SBA, Jac, VVA, BPA) and complex NeuAc-(SNA) specific lectins, indicating that the secretory epithelial cells are active in glycosylation and secretion process. It was also shown in the present study that the basal and luminal epithelial cells are different in their glycoconjugates. The basal epithelial cells are rich in NeuAc(α2,3)Gal residues as they are stained specifically by MAA. The fibroblasts in the epithelial-smooth muscle interface and the smooth muscle cells close to the glandular epithelium are shown to express more glycoconjugates as they are stained intensely by GS-I-B4, GS-II and SBA. However, their role in the epithelial-stromal interaction in the seminal vesicle remains to be elucidated. In summary, the present study reports for the first time on the lectin binding patterns of the guinea pig seminal vesicle, and the results show that the seminal vesicle epithelium elaborates and secretes glycoconjugates in a complex pattern. Some of the lectins might be useful as histochemical markers for the secretory activity and specific structural components in the guinea pig seminal vesicle. © 1998 Chapman & Hall
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003264007923
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  • 10
    Electronic Resource
    Electronic Resource
    Automatic Subassembly Detection from a Product Model for Disassembly Sequence Generation (1999)
    Springer
    The international journal of advanced manufacturing technology 15 (1999), S. 425-431 
    Details
    ISSN: 1433-3015
    Keywords: Key words.Disassembly planning; Subassembly detection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The time taken for the generation of assembly or disassembly sequences is proportional to the number of components in the assembled product. For each additional component considered, the number of possible sequences to assemble (or disassemble the product) increases combinatorially. Research work had been carried out to reduce this complexity so that unfeasible assembly sequences could be discounted. A significant approach to further reduce the time for the generation of the assembly sequences is to group components together into subassemblies and then to treat these subassemblies as "individual components". This will reduce the number of components involved in the search or generation of assembly sequences, and hence reducing the sequence generation time. This paper presents a methodology for automatically extracting subassemblies from a product in order to simplify the disassembly or assembly sequence generation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001700050086
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