Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    ISSN: 1432-0606
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract LetH 1 andH 2 be Hilbert spaces and letN be an algebraic subspace ofH 1 . The least-squares problem for a linear relationL⊂H 1 ⊕H 2 restricted to an algebraic cosetS:=g+N, g ∈ H 1 , is considered. Various characterizations of a minimizer are derived in the form of inclusion relations that incorporate the constraints, and conditions under which a minimizer exists are developed. In particular, it is shown that generalized forms of the “normal equations” for constrained least-squares problems become “normal inclusions” that involve a multivalued adjoint. The setting includes large classes of constrained least-squares minimization problems and optimal control problems subject to generalized boundary conditions. An application of the abstract theory is given to a singular control problem involving ordinary differential equations with generalized boundary conditions, where the control may generate multiresponses. Characterizations of an optimal solution are developed in the form of inclusions that involve either an integrodifferential equation or a differential equation, and adjoint subspaces and/or solutions of certain linear equations.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 2
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary Diploid strains were obtained following protoplast fusion between two citric acid producers of Aspergillus niger, one for the solid culture and the other for the shaking culture. In the shaking culture, all the diploid strains exhibited lower productivities than one parental strain. However, in the solid culture, some diploid strains exhibited higher productivities than either parental strain; the best diploid strain produced 1.2 times as much citric acid as the parental strain in solid culture.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 3
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary From the anoxic zone of an oil shale leachate column three pyridine-degrading bacterial strains were isolated. Two strains were Gram-negative facultative anaerobic rods and one strain was a branched Gram-positive bacterium. The branched Gram-positive strain had the best pyridine-degrading ability. This organism was aerobic, non-motile, catalase positive, oxidase negative, and had no flagellum. The G+C content of the DNA was 66.5 mol%. The major menaquinone was MK-8(H2). The main cellular fatty acids were saturated and monounsaturated straight chains. This organism contained mycolic acid, meso-diaminopimelic acid, arabinogalactan and glycolyl residues in the cell wall. Due to morphological, physiological and chemotaxonomic characteristics this strain was placed in the genus Rhodococcus. The optimum culture conditions were as follows: temperature 32° C, pH 8.0 and 0.1% v/v of pyridine as sole carbon, energy and nitrogen source. Utilization of pyridine by a batch fermentor culture of Rhodococcus sp. was characterized by a specific growth rate of 0.13 h−1, growth yield of 0.61 mg cell·mg pyridine−1 and a doubling time of 5.3 h−1.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 4
    ISSN: 1442-2042
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract  Background: We compared the results of hand-assisted laparoscopic living donor nephrectomy (LLDN) and conventional open living donor nephrectomy (OLDN).Methods: The clinical data on 49 hand-assisted LLDN and 21 OLDN on the left side performed at two institutions in Korea from January 2001 to February 2003 were reviewed. Demographic data of donors and recipients were similar in the two groups.Results: There was one conversion to an open procedure due to bleeding in the LLDN group. The median operation times (180 min in LLDN versus 170 min in OLDN) and warm ischemic times (2.5 min in LLDN versus 2.0 min in OLDN) in the two groups were similar. The estimated mean blood loss, duration of hospital stay and complication rate was also similar in the two groups. The LLDN group reported less pain (visual analog scale) postoperatively (4.1 versus 5.3), but this was not significant (P = 0.058). The time to oral intake in the LLDN group was significantly longer by an average of 1 day (P = 0.001). Return to work was sooner in the LLDN group (4.0 weeks versus 6.0 weeks; P = 0.026). The recipient graft function was equivalent between the two groups. Hand-assisted LLDN appears to be a safe and effective alternative to OLDN.Conclusion: Our findings suggest that this technique may give the ability provide grafts of similar quality to OLDN, while extending to the donors the advantages of a traditional LLDN procedure.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 5
    ISSN: 1432-0703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Abstract At the early stage of using pesticides, some countries that do not have sufficient knowledge of the safety of pesticides may feel inadequate to establish tolerances for pesticide residues. Some published tolerances indicate that levels set for the same pesticides in different countries may vary from a few times to as high as 50 times for lindane. Furthermore, some of the tolerances are so low that they are not practical for agricultural uses. To solve these problems, the following equation was devised and accepted in Taiwan for establishing tolerances for nine pesticides applied to several vegetables. Tolerance=Id×Wb/Wf×Ft×√Pt Where Id is ADI (acceptable daily intake) expressed in milligrams of residues per kilogram of body weight, and obtained from the correlation of U.S. tolerances and ADI values published by FAO/WHO; Wb (in kg) is the body weight; Wf (in kg) is the daily food consumption; Ft is the percent of food treated; and Pt is the percent of a pesticide used on each group of crops. With the consideration of toxicological data, properties of pesticides, safety factors, and dissipation of residues on treated crops, temporary tolerances were established in Taiwan for parathion (0.75 ppm), methyl parathion (0.75 ppm), diazinon (0.5 ppm), lindane (5 ppm), dicofol (5 ppm), malathion (5 ppm), dichlorvos (0.5 ppm), naled (1 ppm) and mevinphos (0.75 ppm), and time intervals between the last application and harvest time were set at 14, 7, 4, 3, 2, 2, 1, 1, and 1 day, respectively. Final tolerances may be established after further studies on residues in commercial fields, in food markets, and in prepared food. Using this method of establishing tolerances, the only experimental data needed are local residue dissipation rates for each pesticide on treated crops. Other data can be obtained either from basic manufacturers or from published or unpublished statistics.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 6
    ISSN: 0219-1032
    Keywords: Capsicum annuum ; Capsidiol ; Domain Swapping ; Sesquiterpene Cyclase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Sesquiterpene cyclase, the first committed step enzyme from the general isoprenoid building block farnesyl pyrophosphate (FPP) for the synthesis of phytoalexin capsidiol, was isolated from the UV-C treated leaves of Capsicum annuum. This sesquiterpene cyclase, termed as CASC2 showing 77% amino acid identity with the previously cloned sesquiterpene cyclase CASC1, was composed of 560 amino acids with a calculated molecular mass of 64,907. The mRNA expression pattern of CASC2 was very similar to that of CASC1 during the time course of UV-C irradiated leaves of pepper on RNA blot analysis by using each specific probe. The heterologous expression in Escherichia coli using the CASC2 full length failed; however the chimeric construct of CASC2 in which the amino terminal 164 amino acid substituted by the equivalent portion of either CASC1 or tobacco sesquiterpene cyclase was capable of expressing the functional sesquiterpene cyclase activities. The radio-labeled enzymatic products catalyzed by the partially purified chimeric CASC2 were comigrated with authentic radio-labeled sesquiterpene on thin layer chromatography.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Periodica mathematica Hungarica 7 (1976), S. 233-237 
    ISSN: 1588-2829
    Keywords: Primary 34-00 ; 34A30 ; 47B25 ; Fundamental solutions ; self-adjoint operators ; resolvents ; adjoint solutions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract Let L=Po(d/dt)n+P1(d/dt)n−1+...+Pn denote a formally self-adjoint differential expression on an open intervalI=(a, b) (−∞≦a〈b≦∞). Here the Pk are complex valued with (n — k) continuous derivatives onI, and P0(t)≠ 0 onI. We discuss integrability of functions which are adjoint to certain fundamental solutions ofLy=λy, and a related consequence.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 8
    ISSN: 1619-7089
    Keywords: Key words: Reiter’s syndrome ; Bone scintigraphy ; Pinhole bone scintigraphy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. The characteristic whole-body and pinhole scintigraphic manifestations of osteo-enthesopathy and arthropathy in Reiter’s syndrome (RS) are described, with an emphasis on early diagnosis. We analysed 59 sets of whole-body and pinhole bone scintigrams of 59 patients with RS. The population comprised 47 men and 12 women with an age range from 15 to 53 years (mean=29.4). Bone scintigraphy was carried out 2–2.5 h after intravenous injection of technetium-99m hydroxydiphosphonate using a single-head gamma camera (Siemens Orbiter Model 6601) with a low-energy high-resolution and a 4-mm pinhole collimator for whole-body and pinhole scintigraphy, respectively. In total 262 lesions of osteo-enthesopathy and arthritis were detected on 59 whole-body scintigrams, an incidence of 4.4 lesions per patient. As anticipated, the lesional distribution was asymmetrical: 68% were in the lower limb skeleton and 32% in the axial and upper limb skeleton. Pinhole bone scintigraphy, applied selectively to one region of interest in each case, enabled us to accurately diagnose arthritis and osteo-enthesopathy. It was noteworthy that osteo-enthesopathy, alone or in combination with arthritis, occurred in 78.9%, and had a strong predilection for the foot bones, especially the calcaneus (25.6%). Pinhole scintigraphy detected enthesopathy in the absence of radiographic alteration in 14.1% of cases and portrayed characteristic signs of RS in 6.9%. Whole-body bone scintigraphy augmented with pinhole scintigraphy was found to be useful in order to panoramically display the systemic involvement pattern, to assess the characteristic bone and articular alterations and to detect early signs of RS.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 9
    ISSN: 1619-7089
    Keywords: Key words: Technetium-99m DISIDA – Biliary obstruction – Hepatic resection – Biliary-enteric anastomosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. We investigated the usefulness of hepatobiliary scintigraphy (HBS) for diagnosing biliary obstruction after curative hepatic resection with biliary-enteric anastomosis. The study population consisted of 54 patients who underwent surgery for benign (n=18) or malignant (n=36) biliary disease. We analysed 68 technetium-99m DISIDA scintigrams which were performed at least 1 month after the surgery (median: 9 months). Final diagnosis was made by operative exploration, other invasive radiological studies or clinical and radiological follow-up for at least 6 months after the surgery. Diagnostic accuracy was analysed according to the pretest likelihood of biliary obstruction. There were two total and 15 segmental biliary obstructions. In patients with symptoms of biliary obstruction and abnormal liver function, HBS always allowed correct diagnosis (two instances of total obstruction, seven of segmental obstruction and seven of non-obstruction). Among the patients with non-specific symptoms or isolated elevation of serum alkaline phosphatase, HBS diagnosed segmental biliary obstruction in seven of the eight instances, and non-obstruction in 22 of 23 instances. There were no cases of biliary obstruction and no false-positive results of HBS in 21 instances with no clinical signs or symptoms of biliary obstruction. The diagnostic sensitivity and specificity of HBS for biliary obstruction were 94% (16/17) and 97% (50/51), respectively. In conclusion, HBS is a highly accurate modality for the diagnosis of segmental biliary obstruction during long-term follow-up after hepatic resection with biliary-enteric anastomosis.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 10
    ISSN: 1615-6102
    Keywords: Pathogenesis-related protein 1 ; CABPR1 gene ; In situ hybridization ; Immunogold labeling ; Capsicum annuum ; Phytophthora capsici
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary In situ hybridization and immunogold labeling were performed to examine the temporal and spatial expression pattern of pathogenesis-related protein 1 (CABPR1) mRNA and PR-1 protein in pepper (Capsicum annuum L.) stem tissues infected by virulent and avirulent isolates ofPhytophthora capsici. CABPR1 mRNA accumulation was confirmed in the infected pepper stem tissue by Northern blot analysis and in situ hybridization. Northern blot analysis showed that the temporal expression ofCABPR1 mRNA varied greatly between compatible and incompatible interactions. An earlier expression of theCABPR1 gene, 6 h after inoculation, was observed in the incompatible interaction. In situ hybridization results revealed thatCABPR1 mRNA was expressed in the phloem areas of vascular bundles in infected pepper stem tissues, but especially strongly in the incompatible interaction. PR-1 protein was predominantly found in the intercellular spaces of pepper stem cells in the compatible and incompatible interactions 24 h after inoculation. Strikingly, the immunogold labeling was associated with fibrillar and electron-dense material localized in the intercellular space. Dense labeling of PR-1 protein was also seen at the interface of the pathogen and the host cell wall, whereas few gold particles were detected over the host cytoplasm. However, PR-1 protein was not detected over the fungal cell wall in either interaction.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...