Your email was sent successfully. Check your inbox.

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

Proceed reservation?

Export
  • 1
    ISSN: 1573-2576
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Rat pleurisy was induced by intrapleural injection of λ-carrageenin. The pleural exudate began to be accumulated 1–3 h after carrageenin administration and showed a peak at 19 h. The levels of prekallikrein and high-molecular-weight (HMW), but not low-molecular-weight (LMW), kininogen in the pleural fluid were markedly decreased when compared with those in plasma. Prekallikrein in rat plasma was activated by incubation with carrageenin in vitro. Captopril increased the plasma exudation significantly at 1–5 h. Depletion of prekallikrein and HMW kininogen in rat plasma by preadministration of bromelain caused marked inhibition of the plasma exudation at 1–24 h. The rest of the plasma exudation after bromelain was further decreased by simultaneous pretreatment of rats with both bromelain and aspirin. These results clearly indicate that plasma prekallikrein was activated in the pleural cavity and bradykihin released was responsible for plasma exudation during the entire course of this pleurisy.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 2
    ISSN: 1435-702X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Adeno virus type 12 has high oncogenic potential in newborn rodents. Moreover, adenovirus 12 induces retinoblastoma-like tumours in baboons and transforms in vitro human embryo retinoblasts. Since adenovirus-transformed cells contain adenovirus transforming gene sequences, the detection of adenovirus 12 transforming gene in tumour cell DNA can provide evidence for or against a possible aetiological role of adenovirus 12 in retinoblastoma. In this experiment, cell DNAs from six retinoblastomas were assayed for adenovirus 12 transforming gene sequences by spot hybridization and Southern blot hybridization, using the labelledEcoRI-C fragment of adenovirus 12 DNA as a probe (the far left 16.5% of the viral genome). No adenovirus 12 transforming gene sequences were detected at the level of 0.1 or 0.5 copy of the probe per diploid cell DNA in all of six retinoblastomas.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 3
    ISSN: 1436-2813
    Keywords: calcium antagonist ; cardioplegia ; myocardial ischemia ; myocardial protection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract An isolated working rat heart preparation was used to determine the effect of diltiazem, a calcium antagonist, on the myocardial metabolism and functional recovery in the ischemic and reperfused heart, under conditions of 15°C of topical hypothermia. The hearts were divided into two groups according to the solution injected into aortic root at the onset of ischemia. Group I (25 hearts) were given 3 ml of cold Krebs-Henseleit bicarbonate buffer solution (KHB), and Group II (25 hearts) were given the same dose of KHB containing 300 μg of diltiazem. After 30 min of reperfusion following 120 min of ischemia, cardiac output (ml/min) was significantly better in Group II (24.1±3.2) than in Group I (9.5±2.5). There were no differences between the groups with regard to tissue levels of creatine phosphate, adenosine triphosphate (ATP), total adenine nucleotide (TAN), glucose-6-phosphate and lactate during the ischemia. However, ATP and TAN levels were significantly higher in Group II after 30 min of reperfusion. These data show that, although diltiazem has little effect in preventing the catabolism of high-energy phosphates during hypothermic ischemia, there was an improvement in myocardial metabolism and an enhanced functional recovery during reperfusion in the diltiazem-treated hearts.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 4
    ISSN: 1435-1536
    Keywords: Nonionic surfactants with even and odd carton atoms ; contribution of two moieties
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Summary Surface and micellar properties of a homologous series of Octaethylene glycol-n-alkyl ethers (C n E8;n = 9 to 15) have been studied in aqueous solutions by the surface tension measurements. The effects of the alkyl chain length comprising even and carbon numbers have been examined in order to evaluate the surface free energy ΔG A-W and the standard free energy ΔG m for the micellization obtained from their surface tension data. The areas per molecule and the equilibrium surface tension values at the CMC decreased with an increasing carbon number and they showed zigzag curves by the difference in even and odd carbon numbers. These findings may be attributed to the differences in the molecular orientation between the molecules with even carbon number and ones with odd carbon number on the air-water interface at CMC. ΔG A-W values decreased linearly with an increasing alkyl chain length but did not show a zigzag line by the differences in even and odd carbon numbers. This suggests that the molecular orientation is not influenced by the difference between their even and odd carbon numbers in the alkyl chain on the surface of the very diluted solution, and their molecules form some stable adsorbed films with an increase of the alkyl chain length. A division of ΔG A-W into the contribution made both by the hydrophilic group ΔG A-W (-W) and by the hydrophobic group ΔG A-W (-CH2-) was attempted as follows; ΔG A-W (-CH2-) = − 0.80 kcal/mol and ΔG a-W (-W) = + 0.15 kcal/mol. The free energy changes ΔG m of micellization were discussed on the basis of the CMC data obtained from the surface tension measurements by treating the formation of micelles as analogous to phase separation, and the contribution from the each moieties in the molecule were calculated as follows; ΔG m (-CH2-) = − 0.68 kcal/mol and ΔG m (-W) = + 1.54 kcal/mol. The difference between ΔG A-W and ΔG m is discussed using their data.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 5
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Zusammenfassung Esterderivate (PCA-nED) von Dodecylalkohol, Äthylenglykoldodecyläther und Diäthylenglykoldodecyläther mit DL-2-Pyrrolidon-5-carbonsäure wurden hergestellt; ihre Eigenschaften als Emulsion sstabilisatoren wurden unter Verwendung eines Oberflächenspannungsmeßgerätes und der mehrfachen Tropfenmethode in Gegenwart von SDS bestimmt und mit denen einer Serie der entsprechenden Polyäthylenglykoldodecyläther (nED) als Stabilisatoren verglichen. PCA-nED-Systeme vermindern im Vergleich zumnED-System die Grenzflächenspannung beachtlich; die Grenzflächenspannung fällt für die PCA-nED- undnED-Systeme bei Anstieg der Äthylenoxid-Kettenlänge ab. Die Stabilität der Öltropfen steigt durch den Zusatz von PCA-nED im Vergleich zumnED-System ungewöhnlich an und nimmt mit der Äthylenoxid-Kettenlänge zu. Mehrere PCA-nED-Proben können als Emulsionsstabilisatoren verwendet werden.
    Notes: Summary Ester derivatives (PCA-nED) of dodecyl alcohol, ethyleneglycol dodecyl ether, and diethyleneglycol dodecyl ether with DL-2-pyrrolidone-5-carboxylic acid were prepared, and their properties as emulsion stabilizer were estimated by using a surface-tension meter and multiple drop method in the presence of SDS and compared to those of a series of the corresponding polyethyleneglycol dodecyl ether (nED) as stabilizers. PCA-nED system remarkably reduced the interfacial tension compared tonED system, and the interfacial tension for both PCA-nED andnED systems decreased with the increase of ethylene oxide chain length. The stability of oil drop remarkably increased by addition of PCA-nED compared tonED system, and increased with the increase of ethylene oxide chain length. A series of PCA-nED was found to be utilized as emulsion stabilizers.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 6
    ISSN: 1573-1111
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Modified γ-cyclodextrins appended by an aromatic moiety show unique binding behavior, including a guest molecule together with the appended moiety in their γ-cyclodextrin cavities. Excimer formation, photoresponsive binding, association with β-cyclodextrin and enhanced catalytic activity have been explained on this basis.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 7
    ISSN: 1573-2878
    Keywords: Fredholm integral equations ; Fredholm resolvents ; initial-value methods ; invariant imbedding methods ; radiative transfer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract In recent years, the invariant imbedding approach to initial-value solutions of Fredholm integral equations with degenerate or semidegenerate kernels has been discussed with emphasis. In the present paper, with the aid of invariant imbedding, the Cauchy problem for Fredholm resolvents with composite displacement kernels is reduced to that for generalized Chandrasekhar'sX-functions andY-functions. In other words, it is shown how to convert the initial-value solution of the resolvent into a system of simultaneous nonlinear integrodifferential equations ofX-functions andY-functions of a single argument. From the computational aspect, the result seems to be more tractable than the original ones.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 8
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 9
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 10
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    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...