Search Results - (Author, Cooperation:J. Pinter)

2018-04-10

American Chemical Society (ACS)

0006-2960

1520-4995

Biology

Chemistry and Pharmacology

2013-08-31

American Association for the Advancement of Science (AAAS)

0036-8075

1095-9203

Biology

Chemistry and Pharmacology

Computer Science

Medicine

Natural Sciences in General

Physics

Adipogenesis ; Animals ; *Cell Differentiation ; Collagen/analysis/chemistry/metabolism ; *Elasticity ; Extracellular Matrix/chemistry/metabolism ; Gene Expression Regulation, Developmental ; Humans ; Lamin Type A/chemistry/genetics/*metabolism ; Mesenchymal Stromal Cells/*cytology ; Mice ; Models, Biological ; Nuclear Lamina/metabolism ; *Osteogenesis/genetics ; Protein Conformation ; Proteome ; *Stress, Mechanical ; Transcription, Genetic ; Tretinoin/metabolism ; Vitamin A/metabolism

1365-3040

Blackwell Publishing Journal Backfiles 1879-2005

Biology

The mid-day responses of wheat ear CO2 and water vapour exchange to full-season CO2 enrichment were investigated using a Free-Air CO2 Enrichment (FACE) apparatus. Spring wheat [Triticum aestivum (L). cv. Yecora Rojo] was grown in two experiments under ambient and elevated atmospheric CO2 (Ca) concentrations (approximately 370 μmol mol−1 and 550 μmol mol−1, respectively) combined first with two irrigation (Irr) schemes (Wet: 100% and Dry: 50% replacement of evapotranspiration) and then with two levels of nitrogen (N) fertilization (High: 350, Low: 70 kg ha−1 N). Blowers were used for Ca enrichment. Ambient Ca plots were exposed to blower induced winds as well the Ca× N but not in the Ca× Irr experiment. The net photosynthesis for the ears was increased by 58% and stomatal conductance (gs) was decreased by 26% due to elevated Ca under ample water and N supply when blowers were applied to both Ca treatments. The use of blowers in the Ca-enriched plots only during the Ca× Irr experiment (blower effect) and Low N supply restricted the enhancement of net photosynthesis of the ear due to higher Ca. In the latter case, the increase of net photosynthesis of the ear amounted to 26%. The decrease in gs caused by higher Ca was not affected by the blower effect and N treatment. The mid-day enhancement of net photosynthesis due to elevated Ca was higher for ears than for flag leaves and this effect was most pronounced under ample water and N supply. The contribution of ears to grain filling is therefore likely to increase in higher Ca environments in the future. In the comparison between Wet and Dry, the higher Ca did not alter the response of net photosynthesis of the ear and gs to Irr. However, Ca enrichment increased the drought tolerance of net photosynthesis of the glume and delayed the increase of the awn portion of net photosynthesis of the ear during drought. Therefore, the role of awns for maintaining high net photosynthesis of the ear under drought may decrease when Ca increases.

Electronic Resource

1365-2486

Blackwell Publishing Journal Backfiles 1879-2005

Biology

Energy, Environment Protection, Nuclear Power Engineering

Geography

Soil water deficits are likely to influence the response of crop growth and yield to changes in atmospheric CO2 concentrations (Ca), but the extent of this influence is uncertain. To study the interaction of water deficits and Ca on crop growth, the ecosystem simulation model ecosys was tested with data for diurnal gas exchange and seasonal wheat growth measured during 1993 under high and low irrigation at Ca= 370 and 550 μmol mol−1 in the Free Air CO2 Enrichment (FACE) experiment near Phoenix, AZ. The model, supported by the data from canopy gas exchange enclosures, indicated that under high irrigation canopy conductance (gc) at Ca= 550 μmol mol−1 was reduced to about 0.75 that at Ca= 370 μmol mol−1, but that under low irrigation, gc was reduced less. Consequently when Ca was increased from 370 to 550 μmol mol−1, canopy transpiration was reduced less, and net CO2 fixation was increased more, under low irrigation than under high irrigation. The simulated effects of Ca and irrigation on diurnal gas exchange were also apparent on seasonal water use and grain yield. Simulated vs. measured seasonal water use by wheat under high irrigation was reduced by 6% vs. 4% at Ca= 550 vs. 370 μmol mol−1 but that under low irrigation was increased by 3% vs. 5%. Simulated vs. measured grain yield of wheat under high irrigation was increased by 16% vs. 8%, but that under low irrigation was increased by 38% vs. 21%. In ecosys, the interaction between Ca and irrigation on diurnal gas exchange, and hence on seasonal crop growth and water use, was attributed to a convergence of simulated gc towards common values under both Ca as canopy turgor declined. This convergence caused transpiration to decrease comparatively less, but CO2 fixation to increase comparatively more, under high vs. low Ca. Convergence of gc was in turn attributed to improved turgor maintenance under elevated Ca caused by greater storage C concentrations in the leaves, and by greater rooting density in the soil.

Electronic Resource

0304-3800

Elsevier Journal Backfiles on ScienceDirect 1907 - 2002

Biology

Electronic Resource

1436-5057

65 K 05 ; 90 C 30 ; nonlinear systems of equations ; Lipschitzian global optimization ; adaptive partition algorithms ; random test problems ; numerical results

Springer Online Journal Archives 1860-2000

Computer Science

Zusammenfassung Es wird ein allgemeiner Rahmen für die Lösung nichtlinearer Gleichungssysteme vorgeschlagen, der auf Prinzipien der globalen Optimierung beruht. Nach einer kurzen Darstellung der benötigten Grundlagen werden numerische Testergebnisse für zwei Klassen von leicht reproduzierbaren Pseudo-Random-Testproblemen vorgestellt.

Abstract A general framework is proposed for the solution of nonlinear equation systems, applying multiextremal (global) optimization methodology. Following a brief presentation of the background needed, numerical results are reported for two classes of easily reproducible pseudo-random test problems.

Electronic Resource

1436-6304

Springer Online Journal Archives 1860-2000

Mathematics

Economics

Summary A number of algorithms were proposed to solve the multiextremal (global) optimization problem, when the set of feasible solutions is given by a finiten-dimensional interval. Here we show that a broad class of such methods can be applied to solve global optimization problems on compact convex sets.

Zusammenfassung Zur Lösung des multiextremalen globalen Optimierungsproblems werden Algorithmen für den Fall vorgeschlagen, daß die Menge der zulässigen Lösungen durch einn-dimensionales Intervall gegeben ist. Es wird hier gezeigt, daß eine breite Klasse solcher Methoden zur Lösung globaler Optimierungsprobleme auf kompakten konvexen Mengen Anwendung finden kann.

Electronic Resource

1436-5057

65 K 05 ; 90C 30 ; Multiextremal optimization problems ; adaptive partition algorithms ; global convergence

Springer Online Journal Archives 1860-2000

Computer Science

Zusammenfassung Die Veröffentlichung behandelt allgemeine Konvergenzeigenschaften adaptiver deterministischer Partitionierungsstrategien für multiextremale Optimierung. In diesem Zusammenhang wird über einen Irrtum in Arbeit [40] hingewiesen.

Abstract This paper highlights the general convergence properties of adaptive determinsitic partition strategies in multiextremal optimization. In this framework, the fallacy of the note [40] is also pointed out.

Electronic Resource

1432-2307

Gastric juice aspiration ; Lung fibrosis ; Complement activation ; Kallikrein inhibitor

Springer Online Journal Archives 1860-2000

Medicine

Summary The gastric juice aspiration syndrome (GJA-S, Mendelson syndrome) was studied experimentally in pigs. Following instillation of gastric juice into the right main bronchus necrosis of pneumocytes and bronchiolar epithelium occurred with activation of complement and a prostaglandin E releasing system (possibly the kinin system). Cell necrosis was followed by loss of surfactant and formation of hyaline membranes, rich in immunoglobulin M. The alveolar damage organized, resulting in intraalveolar and interstitial fibrosis. The causative agents were found to be both gastric hydrochloric acid and pepsin. Pretreatment with H2-, or acetylcholin-receptor-antagonists (cimetidine or pirenzepin) as well as buffering of the gastric juice to a neutral pH did not prevent lung fibrosis. If a mixture of aluminium hydroxide, magnesium carbonate and oxethazaine was added to the aspirate, development of lung fibrosis was prevented, but severe granulomatous reaction with foreign body giant cells within both lungs evolved. Kallikrein inhibitor, when administered intravenously not later than 3 min after artificial aspiration, protected the left lung completely and large areas of the right. If infused within 60–90 s complete protection of the left lung and the right upper lobe was achieved. In the majority of the animals a mild focal fibrosis developed in the right lower lobe; in one experiment both lungs were devoid of fibrotic areas. If Kallikrein inhibitor was infused 5 min prior to aspiration, lung fibrosis was not prevented.

Electronic Resource

1436-5057

65K05 ; 49B99 ; 90C30 ; Multiextremal optimization ; extended univariate algorithms ; convergence ; numerical results

Springer Online Journal Archives 1860-2000

Computer Science

Zusammenfassung In vorangehenden Arbeiten stelle der Autor eine allgemeine Klasse von Verfahren zur Lösung des Problems der globalen Optimierung inn (n≥1) Dimensionen vor. In dieser Arbeit wird gezeigt, daß einige Typen von univariaten Methoden (n=1) sich direkt verallgemeinern lassen auf den Falln〉1. Über numerische Erfahrungen wird berichtet.

Abstract In recent papers of the author a general class of algorithms was proposed to solve the global optimization problem inn dimensions (n≥1). Here we show that certain types of univariate methods (n=1) can be generalized in a straightforward manner to obtain algorithms for the casen〉1. Some numerical test tesults are also reported.

Electronic Resource

1573-2584

Springer Online Journal Archives 1860-2000

Medicine

Abstract The complex therapy of renal tumours is discussed. While pointing to the advances in this field over the last decade, the fact is emphasized that it is primarily in the radicality of the operations where progress has been achieved. Radiotherapy is viewed with a critical eye. Its hazards are illustrated by observations of four lethal cases consecutive to complications of postoperative irradiations, which had been administered without any need when malignant changes were no longer present.

Electronic Resource

1573-8922

Springer Online Journal Archives 1860-2000

Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

Abstract The effect of compressive forces on the mineral components of bone tissue was studied. On the basis of x-ray diffraction analysis and the observed electrical and recrystallization effects, it is proposed that compression has a direct effect on the formation of callus through a definite means of compression osteosynthesis.

Electronic Resource

1434-3916

Springer Online Journal Archives 1860-2000

Medicine

Zusammenfassung Es wird über die physikalische Analyse des Verlängerungskallus mittels Elektronen-diffraktion und Thermogravimetrie berichtet. Es zeigt sich, daß im Verlängerungskallus auch Brushit vorhanden ist und daß die Kristalle größer als im physiologisch entstehenden reifen Knochen sind, zahlenmäßig allerdings in einer geringeren Menge vorkommen. Der Verlängerungskallus ist aus kristallographischer Sicht dem normalen Kallus, wie wir ihn von der Frakturheilung her kennen, ähnlich.

Summary Physical examination using electron diffraction and thermogravimetry was performed on the distraction callus of six metacarpal bones of sheep. Brushite was observed in this callus beside apatite, and the number of crystals found was less than in physiological nature bone. From the crystallographic point of view the distraction callus was found similar to the callus known in fracture healing.

Electronic Resource

1573-2584

Springer Online Journal Archives 1860-2000

Medicine

Abstract Surgical radicality in tumours of the urinary tract with lymphonodular deposits requires extirpation of the adjacent and regional lymphadenoid tissues, in particular of the lymph nodes. The theoretical and practical aspects of lymphadenectomy in testicular and renal tumours are discussed, and the technical problems are outlined. The importance of early diagnosis and the benefits of surgery of adequate radicality involving lymphadenectomy are emphasized.

Electronic Resource

1573-2584

Springer Online Journal Archives 1860-2000

Medicine

Abstract Observations made over two years in connexion with posterior vertical lumbotomy are described. Especially good results have been obtained in children, lean and asthenic individuals. Nepropexy, pyelolithotomy, removal of calculi from the upper ureteral tract, removal of hypoplastic or cirrhotic kidneys are preferably performed from posterior vertical lumbar approach.

Electronic Resource

1573-2584

Springer Online Journal Archives 1860-2000

Medicine

Abstract Observations with ureterosigmoidostomy of various types are reviewed. After an exploratory period of several years the procedure described by Goodwin was adopted, it having been found to involve less life-threatening complications than did the other techniques.

Electronic Resource

1573-2584

Springer Online Journal Archives 1860-2000

Medicine

Electronic Resource

1573-2584

Springer Online Journal Archives 1860-2000

Medicine

Abstract Six out of 135 pyeloplastic operations were performed in the presence of an acute infection. In spite of the inflammatory process the postoperative course was uneventful and the late results were also satisfactory. With the exception of one case, the operation was invariably of the Anderson-Hynes type, with splinting of the ureter and nephrostomy. The anastomosis was prepared with interrupted cat-gut stitches. Three cases are reported in some detail.

Electronic Resource

1573-2584

Springer Online Journal Archives 1860-2000

Medicine

Abstract Patients suffering from acute and chronic renal failure have been treated with large doses of furosemide. The treatment stopped or prevented sodium and water retention at the stage of chronic compensated renal failure and in the initial phase of compensatory polyuria following acute anuria. Furosemide therapy, accompanying regularly performed haemodialysis in cases of chronic renal failure, yielded no significant results.

Electronic Resource

1573-2584

Springer Online Journal Archives 1860-2000

Medicine

Abstract Experience from the removal of 250 tumorous kidneys furnished ground for the author to describe a few important technical points of surgery, which emerged in the course of radical nephrectomy, isolation of the renal artery and vein, and removal of tumour thrombus from the vena cava. Radical surgery in the T2–3 N1–2 M0 stage has been found to heighten the chances of five-year survival for the majority of patients.

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