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排序方式: 共有381条查询结果,搜索用时 15 毫秒
41.
CA Juttner WE Fibbe J Nemunaitis L Kanz AM Gianni 《Canadian Metallurgical Quarterly》1994,14(5):689-693
An International Consensus Meeting on blood cell transplantation took place in Heemskerk, The Netherlands on 27-29 June 1994. The term 'blood cell transplantation' was preferred to peripheral blood stem cell transplantation. The following issues were addressed: stem cell assessment and ex vivo expansion, techniques for stem cell mobilization, applications of blood cell transplantation, malignant cell contamination and allogeneic blood cell transplantation. 相似文献
42.
The general problem of desorption of a volatile component accompanied by chemical reaction is considered. Basic points of difference between chemical absorption and desorption are emphasized. The conditions required for chemical absorption theory to apply to chemical desorption are established. A general procedure for solving chemical desorption problems when the rates of reaction are very high is developed; the procedure applies up to and including the limit where the reactions are instantaneous. 相似文献
43.
C Zotti F Carle A Moiraghi Ruggenini C Marini MT Capaldi 《Canadian Metallurgical Quarterly》1982,75(1-6):91-100
The Authors have tested the significance of the correlation of the mean total IgM concentration, the IgG: IgM ratio and the presence of specific anti-Toxoplasma gondii IgM, determined with different serological reactions. The piece of research has been carried out on 72 samples of subjects with active toxoplasmic infections. 相似文献
44.
Quaranta Alessandro Alberigi Catellani Alessandra Cuzzilla Maurizio Zanarini Gianni 《IEEE transactions on nuclear science》1983,30(3):1862-1869
Starting from energy balance considerations, the time dependence of the induced charge in closed ended HPGe gamma detectors is numerically determined as a function of detectors geometry, applied voltage and coordinates of created e-h pairs. These data can support the choice of geometry and applied voltage for the optimal use of closed ended detectors. 相似文献
45.
A general, physico-chemical analysis of mass transfer rate promotion in the system CO2-potassium carbonate-water-promoter is presented. Different possible mechanisms of promoter action including homogeneous catalysis, “shuttle” mechanism and surface reactions are discussed and classified. A unified picture of promoter chemistry is presented, showing that differences between inorganic and organic promoters are predominently quantitative, not qualitative.The “shuttle” mechanism is analyzed for absorption. The analysis leads to the prediction that the CO2 mass transfer rate may be influenced by the liquid hold up. This is related to the fact that, although the reaction in the interface region may be fast enough to enhance the mass transfer rate, the different reaction in the bulk may not be fast enough to maintain chemical equlibrium. This complex type of chemical absorption process has not been considered previously in the literature. 相似文献
46.
The general problem of gas absorption and desorption accompanied by an instantaneous, reversible chemical reaction is approached from the viewpoint that chemical equilibrium prevails everywhere in the liquid phase. The approach allows absorption and desorption to be analysed along the same lines. A complete analytical solution is given for the film theory model and the penetration theory equations are set up in general form.The equations for the enhancement factor reduce to the classical “irreversible” result for absoption when the driving force, φ, becomes very large, rather than in the limit of very large equilibrium constant as the word irreversible seems to suggest. The corresponding asymptote for desorption is obtained by setting φ = 0. A third asymptotic region, in which φ is in the neighborhood of unity, is established for both absorption and desorption. Physically this is the region where driving forces are very small, which from an industrial viewpoint is what happens in absorption and desorption units near pinches.The asymptotic analysis for the pinch region is applied to hydrogen sulfide absorption and desorption from aqueous diisopropanolamine solution. For this system use of the “irreversible” equations grossly overestimates the enhancement factor. Gas-phase controls mass transfer at the lean end of the absorber but at the other terminal locations of the towers the liquid-phase resistance cannot be neglected. 相似文献
47.
AM Gianni S Siena M Bregni M Di Nicola F Peccatori M Magni F Ravagnani I Sklenar G Bonadonna 《Canadian Metallurgical Quarterly》1993,4(9):759-766
BACKGROUND: Interleukin-3, a recombinant cytokine with multilineage stimulatory effect on hematopoietic cells, was administered to 22 previously untreated breast cancer patients following high-dose therapy with cyclophosphamide (7 g/m2). PATIENTS AND METHODS: The growth factor, administered through continuous intravenous infusion at 1 (3 patients), 2.5 (3 patients), 5 (10 patients) and 10 micrograms/kg/day (6 patients), was well tolerated up to 5 micrograms/kg/day. RESULTS: Nausea, vomiting, fever and headache prevented administration of the intended dose to all 6 patients in the 10 micrograms/kg/day cohort. At the maximal tolerable dose (5 micrograms/kg/day) the growth factor significantly accelerated granulocyte, platelet and reticulocyte recovery as compared to matched historical controls who received high-dose cyclophosphamide without cytokine infusion. Moreover, no platelet transfusions and fewer erythrocyte transfusions were required in interleukin 3-treated patients. In contrast to GM-CSF and G-CSF, interleukin 3 showed no effect on the mobilization of hematopoietic progenitor cells in the peripheral blood. CONCLUSIONS: Interleukin-3 represents a well-tolerated cytokine, clinically useful for accelerating trilineage hematopoietic recovery following severely myelotoxic treatments such as high-dose cyclophosphamide. 相似文献
48.
49.
Valeria Cavatorta Stefano Sforza Giancarlo Aquino Gianni Galaverna Arnaldo Dossena Elide Anna Pastorello Rosangela Marchelli 《Molecular nutrition & food research》2010,54(10):1452-1457
A simulated gastrointestinal digestion has been carried out on purified peach lipid transfer protein, one of the main allergens among the population of the Mediterranean area and the major allergen of peach allergic patients. The percentage of intact protein, after extensive digestion, measured by comparison with a non‐digestible peptide analogue used as internal standard, was found to be about one‐third of the original protein content. The peptides formed in digested fraction were characterized by means of LC/MS. The products of the digestion essentially derived from trypsin action, whereas the protein appeared to be resistant to pepsin and chymotrypsin. The identified peptides could be classified as low molecular weight and high molecular weight peptides. The latter consisted of the full protein, with the disulfide bridges still intact, deprived of the smaller peptides. The different digestion products, including the high and low molecular weight peptides, were purified by LC and assessed, together with the intact protein, by dot‐blot analysis with sera of allergic patients, allowing to estimate their potential allergenicity. The intact protein and the high molecular weight peptides were found to be recognized by patients' sera, whereas the small peptides were found to be not reactive. 相似文献
50.
Silvia Folloni Gianni Bellocchi Adelina Prospero Maddalena Querci William Moens Monica Ermolli Guy Van den Eede 《Food Analytical Methods》2010,3(4):304-312
Real-time PCR (RTi-PCR) is the technique of choice for event-specific quantification of genetically modified organisms (GMOs)
by determining the amount of event with respect to a species-specific reference gene. Reference genes can be amplified from
the genome extracted from Certified Reference Materials (CRMs) or from ad hoc designed plasmids. In the present study, we
statistically evaluate the performance of RTi-PCR protocols for GM maize MON810 event by using both genomic DNA from conventional
CRMs and a plasmid containing sequences representative of four maize species-specific reference genes. The significance of
simple and interaction effects of several variables included in the experimental design on DNA quantification methods and
RTi-PCR were evaluated and discussed. Statistically significant differences on Ct values may have an impact on the GMOs quantification
and consequently on the compliance of GM quantification-established legal thresholds. Our results confirm the reliability
of the plasmid as alternative calibrant for the calculation of GMOs copy number. 相似文献