Untersuchungen über die persönlichen und familiären Schwierigkeiten der Patienten bei kieferorthopädischen Behandlungen

1982

Auch bei vorsichtiger Interpretation der Antworten, die wir bei Interviews, durchgefuhrt im hauslichen Millieu der patienten, erhalten haben, kann man feststellen, das die Begleitumstande einer kieferorthopadischen Behandlung zum Teil eine beachtliche, aber wenig beachtete Belastung fur den Patienten und seine Familie mit sich bringen. In einigen Punkten erscheint andererseits die durchschnittliche Belastung geringer als angenommen. Dabei sind erhebliche interindividuelle Unterschiede zu beachten. In Einzelfallen, so mus man annehmen, ergeben sich, besonders in ohnehin traumatisierendem Milieu und bei ungunstigem Erziehungsverhalten der Eltern, langdauernde Konfliktsituationen mit teilweise…

On the unification of electroweak interactions with gravity

1982

It is shown that the electroweak interactions in the Salam-Weinberg model can be described by a space-time connection form which preserves the space-time metric multiplied by a conformal factor. In addition, one needs an extraSO(2)-connection form. The Dirac field in this formalism is described (after making a certain regularity assumption) by a vierbein field for the space-time metric and a complex scalar field.

Correction of the unfavourable effects of vasopressin by nitroglycerin infusion

1982

Nitroglycerin was administered with vasopressin to prevent adverse effects. Vasopressin 0.25U . 70 kg-1 min-1 was infused intravenously in four dogs for 40 minutes, when a venous infusion of nitroglycerin 1.2 micrograms . kg-1 . min-1 was added for 20 minutes. Nitroglycerin 1.2 micrograms . kg-1 . min-1 alone was infused intravenously in another four dogs for 40 minutes. The venous blood pressures (mesenteric and central) and arterial pressures (mesenteric and femoral), the electrocardiogram and arterio-venous difference were recorded. Nitroglycerin was shown to annul the unfavourable effects of vasopressin without altering its efficacy upon portal pressure.

Mutants of Saccharomyces cerevisiae cell division cycle defective in cytokinesis. Biosynthesis of the cell wall and morphology

1982

The four temperature-sensitive mutants of Saccharomyces cerevisiae in the cell division cycle defective in cytokinesis (cdc, 3, 10, 11 and 12), have been analyzed with respect to the biosynthesis of the cell wall polymers. After 3 hours of incubation at the non-permissive temperature (37 degrees C) these strains stop growing. The synthesis of glucan, mannan and chitin (wall polymers) level off in a similar time, but glucan, mannan and chitin synthases remained active for at least 4 hours. If the mutants are analyzed by transmission and scanning electron microscopy different pictures emerge. Two of the mutants cdc 10 and cdc 12, after 3 hours of incubation at 37 degrees C present apparently …

Constancy of diameter through the cell cycle ofSalmonella typhimurium LT2

1982

Measurements of cell diameter and length inSalmonella typhimurium LT2 cells were correlated using both light and electron microscopy. In cultures growing at high, intermediate, and low rates, cell diameter does not change with length. This constancy is also maintained in septated cells before division. Since length increases continuously with cell age, the above observations mean that cells maintain a constant diameter during the cell cycle.

Studies of the synthesis of heterocyclic compounds. Part VII. The preparation of some new 3- and 5-amino-pyrazoles by endocyclicN-substitution of 3(5…

1982

By reaction of some 4-carbethoxy(or cyano)-3(5)-R-5(3)-aminopyrazoles 1 with 2-nitrobenzoyl chloride or 2-nitrobenzenesulfonyl chloride, a number of novel 3- and 5-amino-1-(2-nitrobenzoyl or 2-nitrobenzene-sulfonyl)pyrazoles 6 and 7 were obtained. Every compound appearing during the endocyclic N-substitution process can be identified and determined by glc. The use of nmr offers a rapid, unambigous method for determining the proposed structures.

The Glomerular Lesions in Endotheliotropic Hemolytic Nephroangiopathy (Hemolytic Uremic Syndrome, Malignant Nephrosclerosis, Post Partal Renal Insuff…

1982

The term "Endotheliotropic Hemolytic Nephroangiopathy" (EHN) comprises various clinically or pathomorphologically defined disease states with severe renal lesions (e.g. hemolytic uremic syndrome, malignant nephrosclerosis, post partum renal insufficiency) which, to date, have been considered as different entities. We attempted to assign accompanying glomerular changes based upon light and electron microscopy to the above mentioned clinical pictures and their various stages. The accordingly classified glomerular lesions (G1--G3 and Ga) are of critical importance in pathohistological differential diagnosis. Since it is assumed that fibrin is a causing event in the pathogenesis of the vascular…

CAPD + Hemoperfusion Once a Week for End Stage Renal Disease

1982

Beta decay of 40Sc to proton and alpha-particle unbound states in 40Ca

1982

Delayed charged particle emission associated with the precursor nuclide 40Sc was studied by use of the He-jet technique. Altogether 40 proton groups (1.0 MeV < Ep < 3.7 MeV) and 21 α-particle groups (2.0 MeV < Eα < 4.6 MeV) were observed. Total proton and α-particle branching ratios were measured to be (4.4±0.7) × 10−3 and (0.17±0.05) × 10−3, respectively. Association of the delayed particle emitting levels with the levels observed in resonance reaction studies is discussed. The fact that the most prominent α-particle groups do not have a counterpart in resonance reaction data suggests collectivity or a cluster configuration for the emitting levels. Log ft values (upper limits) for β+ trans…

Quantitative studies of the secretion of complement component C3 by resident, elicited and activated macrophages. Comparison with C2, C4 and lysosoma…

1982

To quantitate the secretion of complement component C3 by guinea pig peritoneal macrophages an enzyme-linked immunosorbent assay was developed. C3 secretion was studied in resident, elicited and activated macrophages and compared with release of hemolytically active C2 and C4, as well as the lysosomal enzyme β-D-2-acetamido-2-deoxyglucosidase. Resident macrophages secreted about 6 ng C3/106 cells/h into culture supernatants over a period of 12 h. Corynebacterium parvum-activated cells were found to secrete 3 times that amount at nearly constant rates. There was a stepwise increase in secretion of functional C2 and C4 when comparing resident, elicited and activated macrophages; secretion was…

A comparative study of the application of the method of least-squares in the potentiometric determination of protonation constants.

1982

Methods of simple and multiple linear regression applied to the potentiometric determination of protonation constants of diprotic and triprotic acids are studied critically. The best way of fitting the data, according to the order of magnitude of the constants, is established. The conclusions are checked by calculating the protonation constants of succinic and citric acids.

"Synaptic" ribbons and spherules of the rat pineal gland: day/night changes in vitro?

1982

In the present study pineal glands of rats aged 69–71 days were studied in vivo and in vitro with respect to day/night changes of “synaptic” ribbons and spherules. It was found that ribbons outnumber spherules by a factor of 3. In vivo, both ribbons and spherules show a roughly 3-fold increase in number at 1 a.m. when compared to 1 p.m. Up to 39 h in vitro, the two structures in question did not reveal day/night differences in amount, suggesting that diurnal rhythmicity of the gland did apparently not persist in organ culture. After 3 h in organ culture, the spherules, but not the ribbons, showed a striking increase in number, showing that ribbons and spherules may be governed by different …

Preparation of large unilamellar vesicles

1982

Single (unilamellar) and oligolamellar lipid bilayer vesicles of large diameter have great potential in membrane research. In particular, large unilamellar bilayer vesicles (diam. >50 m) would permit the insertion of microelectrodes for the measurement of the electrical properties of lipid bilayer membranes of different compositions. Furthermore, vesicles large enough to be observed by light microscopy could be fused with cells with the aid of the electric field method [l-4]. Since vesicles (liposomes) can be loaded with macromolecules, this might be an elegant means of transferring proteins or plasmids into cells. Large vesicles with different lipid compositions and only one unit membrane …

false

1982

false

1982

Quasielastic neutron scattering study of dynamics at the crossover from dilute to semidilute behavior in polymer solutions

1982

Patterns of puffing activity and chromosomal polymorphism in Drosophila subobscura I. J. and U chromosomes

1982

A study of the puffing patterns of the Jst, J1, U1−2, U1−2−8 and Ust chromosomal arrangements of Drosophila subobscura, from different geographical origins, has been carried out. Twenty-eight puffs were observed, 10 on the J chromosome, and 18 on the U chromosome. No differences, whether qualitative or quantitative, have been found between the puffing pattern of the J chromosome, whether from the same of different geographical background. In the U chromosome, the U1−2 and U1+2+8 arrangements show the same puffing pattern, and neither quantitative nor qualitative differences were found. However, the puffing pattern of these chromosomes alters considerably in the Ust arrangement of the K228 l…

Zum Mechanismus der Polymerkristallisation

1982

Auf der Grundlage der Ergebnisse von Rontgenkleinwinkel-Streuexperimenten und elektroenenmikroskopischen Untersuchungen an verzweigtem Polyethylen wird ein neues Modell zum Ablauf des partiellen Kristallisierens und Schmelzens entwickelt. Im Modell wird der Aufbau der Lamellarstruktur als sukzessive „Einschubkristallisation“ beschrieben, die durch die Konzentration an nichtkristallisierfahigen Einheiten in den amorphen Bereichen gesteuert wird. Die Kinetik der Einschubkristallisation last sich durch dilatometrische Experimente verfolgen. Aus vergleichenden Rontgenkleinwinkel- und Ramanstreuexperimenten kann auf eine Anreicherung der Cobausteine an den Lamellenoberflachen geschlossen werden.

Dependence of motion sickness in automobiles on the direction of linear acceleration.

1982

Thirty-eight normal volunteers were tested in an ambulance car while being accelerated in one of the following positions: (1) sitting upright facing forward in the car, (2) lying supine on a stretcher head forward, (3) supine position head backward. Consecutive short periods of negative horizontal acceleration (0.7–0.95 g) were achieved by brisk braking manoeuvres of the car, followed by weak reacceleration (0.15 g). Motion sickness symptoms were observed and recorded after each experiment using a special motion sickness scaling index which was weighted according to the strength of any particular symptom. The results indicate that horizontal linear acceleration in a car, such as experienced…

Keratinizing Desquamative Squamous Metaplasia of the Upper Urinary Tract: Leukoplakia—Cholesteatoma

1982

Garra tibanica ghorensis subsp.nov. (Pisces: Cyprinidae), an African element in the cyprinid fauna of the Levant

1982

Garra tibanica ghorensis subsp. nov. is described from the southern Dead Sea Valley. In the Levant it represents the only cyprinid fish with African affinities known to date. It is suggested that G. t. ghorensis reached the area of its present distribution from the south and is not to be regarded as a relict of an earlier migration of the species to Africa via the Levant.

Antivirale wirkstoffe, XXI [1] perfluoralkyl-2-(4-nitroanilino)pyrimidine

1982

Zusammenfassung Die Synthese von fluorhaltigen 4,6-disubstituierten 2-(4- Nitroanilino)pyrimidinen gelingt durch Reaktion von 4-Nitrophenylguanidin- hydrochlorid mit fluorierten β-Diketonen in Gegenwart von Kaliumcarbonat im Schmelzflus. Die Substituenten in 4,6-Stellung des Pyrimidinringes umfassen einerseits Perfluoralkylgruppierungen, wie Trifluormethyl- und Heptafluorpropylgruppen, andererseits Alkyl- und Arylgruppierungen, wie Methyl-, Ethyl-, Isopropyl-, 3-Methylbutyl-, tert. Butyl-, Phenyl- und 2-Naphthylgruppen. Zur Charakterisierung der dargestellten substituierten Pyrimidine sind massenspektroskopische und IR-Daten herangezogen worden.

Molecular association in water-isomeric pentanol mixtures at 25�C

1982

The results of static dielectric constant and viscosity measurements on solutions of water (concentration range 0 to 0.3 mole fraction) in 2-pentanol, 3-pentanol, 2-methyl-1-butanol, 3-methyl-1-butanol, and 2-methyl-2-butanol together with previous results for solutions of water in n-pentanol are discussed in terms of the information that they provide on the nature and the extent of molecular association in these solutions. We conclude that in most systems this association leads to the formation of tetrahedral complexes such as H2O(ROH)4. Evidences of the correlation of water-alcohol interactions with molecular parameters (position of OH group, steric hindrance of alkyl chain) of alcohols a…

Combined effect of elastic energy and myoelectrical potentiation during stretch-shortening cycle exercise.

1982

In addition to the utilization of muscle's elastic energy enhancement of performance in exercise involving stretch-shortening cycle might be also due to simultaneous increase of myoelectrical activity. This hypothesis was tested by examining three athletes during jumping exercise on force-platform. Vertical jumps were performed with and without preliminary counter-movement, and the jumps were called counter-movement jump (CMJ) and squatting jump (SJ), respectively. In both conditions several jumps were performed also with extra loads on the shoulders (15–220% of b. wt.). Additional droppingjumps (DJ) were executed from different heights (20–100 cm). During jumping exercise myoelectrical act…

An alternative formulation of the boundary element method

1982

Abstract The paper suggests an alternative formulation of the Boundary Element Method, in which singular solutions generated by unit dislocations are required and moreover the stresses at the interior points of the body are directly computed from the boundary quantities, without passing through the displacements. Relationships between the singular solutions for unit dislocation and unit force are derived.

On the factors governing the pressure dependence of the viscosity of moderately concentrated polymer solutions

1982

Viscosity measurements were carried out as a function of pressure and temperature with solutions of polystyrene in eight (endothermal) θ-solvents at the respective critical composition by means of a Searle-type apparatus. A rolling-ball viscometer was used for the investigation of the pure solvents. In all cases the viscosity coefficient increases in a more or less exponential manner when the pressure is raised. For θ-conditions, the volumes of activation of the solutions exceed that of the pure solvent by typically 10–15%. The exact amount of this extra efffect stemming from the presence of the polymer and its variation with temperature can be qualitatively correlated with the heats of mix…

D-Malic enzyme of Pseudomonas fluorescens.

1982

By the enrichment culture technique 14 gram-negative bacteria and two yeast strains were isolated that used D(+)-malic acid as sole carbon source. The bacteria were identified as Pseudomonas putida, Pseudomonas fluorescens, Pseudomonas aeruginosa and Klebsiella aerogenes. In cell-free extracts of P. fluorescens and P. putida the presence of malate dehydrogenase, D-malic enzyme (NAD-dependent) and L-malic enzyme (NADP-dependent) was demonstrated. D-Malic enzyme from P. fluorescens was purified. Stabilization of the enzyme by 50 mM ammonium sulphate an 1 mM EDTA was essential. Preparation of D-malic enzyme that gave one band with disc gel electrophoresis showed a specific activity of 4-5 U/mg…

Clinical pharmacokinetics of atenolol — A review

1982

Atenolol is a hydrophilic betareceptor blocking drug, which is predominantly eliminated via the kidneys, only about 5% of the atenolol is metabolised by the liver. After oral administration atenolol is incompletely absorbed from the intestine, so about 50% of the beta blocker are finally biovailable. In plasma only 3% of atenolol are protein-bound. There exists a linear relationship between the atenolol plasma levels and the degree of beta blocking effect measured by inhibition of the exercise-induced tachycardia. No correlation was found between plasma levels of atenolol and blood pressure lowering activity of the drug. After oral administration elimination half life of atenolol is calcula…

Esr, a second locus in the house mouse controlling esterase-5

1982

Electrophoretic variation characterized by the presence (ES-5B+) or absence (ES-5B−) of esterase-5B in the plasma of the house mouse has been observed. It is suggested that the expression of esterase-5B is controlled by an autosomal locus, Esr, linked to Ldr-1 on chromosome 6, in addition to the presumptive structural locus Es-5, which is located on chromosome 8. A gene order of Lyt-3-Esr-Ldr-1 was determined by two crosses.

Ultrasonic demonstration of small pancreatic islet cell tumors.

1982

In three patients real-time sonography successfully localized small pancreatic islet cell tumors measuring 7, 8, and 17 mm in size. Ultrasound is suggested as the initial radiologic examination for localization of endocrine pancreatic tumors. If ultrasound is negative or equivocal, computerized tomography, arteriography, and pancreatic venous sampling are indicated.

L'orientation des bacheliers : de l'étude des déterminismes à celle des prises de décisions

1982

International audience

Inhibitoren der Korrosion 28 (1). 2-Aminopyrimidin (2-AP) als an Inhibitor der the Korrosion des Kupfers in Salzlösungen unter Sauerstoff

1982

2-Aminopyrimidin ist der z. Z. beste Inhibitor der Korrosion von Kupfer unter Standardbedingungen. Mit den aus der Oberflache der Kupferprobe austretenden oder gebildeten Cu1+-Ionen baut sich eine Schutzschicht auf. Die Ausbildung dieser Deckschicht wird studiert als Funktion: (a) der Konzentration an 2-AP und der Cu2+-Ionen, (b) der Stromungsgeschwindigkeit und (c) in Abhangigkeit von der Art der Anionen im korrosiven Medium. Ruhepotential-Zeit-Messungen, Strom-Spannungskurven, Polarisationswiderstandskurven und Halteversuche, ohne und mit 2-AP sowie ohne und mit Cu2+-Ionen vermitteln einen Einblick in den Aufbau der Deckschicht. Inhibiors of corrosion 28 (1). 2-Aminopyrimidine (2-AP) as a…

Optimization of spinning, drawing, and annealing conditions in the production of highly oriented fibers from the polycaprolactam/3.7% LiCl system

1982

A polycaprolactam/3.7% w/w LiCl system, obtained by anionic polymerization of caprolactam directly in the presence of salt, has been employed for the production of highly oriented fibers. More particularly, an optimization of spinning, drawing, and annealing conditions has been performed, finally obtaining fibers which shows very satisfactory mechanical results. Namely, average moduli values up to 12 GPa and strength values up to 1 GPa when fracture is far from clamps, have been observed.

Neuromuscular function and mechanical efficiency of human leg extensor muscles during jumping exercises

1982

The influence of prestretch amplitude on the mechanical efficiency was examined with 5 subjects, who performed 5 different series of vertical jumps, each of which differed with respect to the mechanics of the knee joint action during the prestretch (eccentric) phase of the contact on the floor. Electromyographic activity was recorded from the major extensor muscles during the entire work period of 1 min per series. In addition, expired air was collected during the test and recovery for determination of energy expenditure. Mechanical work was calculated from the vertical displacement of the body during the jumps. The results indicated that high net efficiency of 38.7% was observed in conditi…

Rentes différentielles et rente absolue : un réexamen

1982

Il existe en matière de rente foncière un schéma théorique assez largement répandu depuis le XIXème siècle : les conditions économiques inégales attachées naturellement et définitivement aux différentes parties du sol font naître des rentes différentielles égalisatrices. A ces rentes différentielles s'ajoute une rente absolue, la même sur tous les terrains. Mais des divergences irréductibles apparaissent dès qu'il s’agit d'expliquer la constitution de ces rentes, chaque conception révélant parfois un certain manque de cohérence. Le désaccord le plus fondamental concerne la rente absolue, que les économistes expliquent, qui par le moyen de la "composition organique du capital" (MARX, 1894), …

Dopaminergic modulation of evoked vasopressin release from the isolated neurohypophysis of the rat

1982

1. Neurointermediate lobes of rat pituitaries were incubated in Locke or Krebs solution, and the vasopressin released into the medium was assayed on the blood pressure of the pithed rat or by a radioimmunological procedure. Release of vasopressin over resting levels was evoked either by incubation with 60 mM KCl (high K) solution or by electrical stimulation of the pituitary stalk. Two different kinds of electrical stimulation were carried out. Procedure A (1 ms, 10 Hz, 5 times for 1 min within 10 min) induced a vasopressin overflow which was greatly calcium-dependent but only insignificantly sensitive to tetrodotoxin (TTX). Procedure B (0.2 ms, 15 Hz, 10 s trains with 10 s intervals for 10…