On Robin boundary conditions and the Morse potential in quantum mechanics

The physical origin is investigated of Robin boundary conditions for wave functions at an infinite reflecting wall. We consider both Schr\"odinger and phase-space quantum mechanics (a.k.a. deformation quantization), for this simple example of a contact interaction. A non-relativistic particle moving freely on the half-line is treated as moving on the full line in the presence of an infinite potential wall, realized as a limit of a Morse potential. We show that the wave functions for the Morse states can become those for a free particle on the half-line with Robin boundary conditions. However, Dirichlet boundary conditions (standard walls) are obtained unless a mass-dependent fine tuning (to a reflection resonance) is imposed. This phenomenon was already observed for piece-wise flat potentials, so it is not removed by smoothing. We argue that it explains why standard quantum walls are standard. Next we consider the Wigner functions (the symbols of both diagonal and off-diagonal density operator elements) of phase-space quantum mechanics. Taking the (fine-tuned) limit, we show that our Wigner functions do reduce to the expected ones on the half-line. This confirms that the Wigner transform should indeed be unmodified for this contact interaction.Comment: 19 page

SOME THROMBOCYTIC AND ERYTHROCYTIC PARAMETERS AFTER BURNING (EXPERIMENTAL INVESTIGATIONS)

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DIAGNOSTIC AND TREATMENT TACTICS IN MECHANIC JAUNDICE

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Flow of S-matrix poles for elementary quantum potentials

The poles of the quantum scattering matrix (S-matrix) in the complex momentum plane have been studied extensively. Bound states give rise to S-matrix poles, and other poles correspond to non-normalizable anti-bound, resonance and anti-resonance states. They describe important physics, but their locations can be difficult to find. In pioneering work, Nussenzveig performed the analysis for a square well/wall, and plotted the flow of the poles as the potential depth/height varied. More than fifty years later, however, little has been done in the way of direct generalization of those results. We point out that today we can find such poles easily and efficiently, using numerical techniques and widely available software. We study the poles of the scattering matrix for the simplest piece-wise flat potentials, with one and two adjacent (non-zero) pieces. For the finite well/wall the flow of the poles as a function of the depth/height recovers the results of Nussenzveig. We then analyze the flow for a potential with two independent parts that can be attractive or repulsive, the two-piece potential. These examples provide some insight into the complicated behavior of the resonance, anti-resonance and anti-bound poles.Comment: 23 pages, 15 figure

ABOUT DIAGNOSTICS AND TREATMENT OF GASTRODUODENAL HEMORRHAGE

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Progress in tetraploid wheat breeding through the use of synthetic hexaploid amphiploids

Four amphiploid lines (SHW) based on T. monococcum (Tm) and T. boeoticum (Tb) were crossed to T. durum varieties to generate 13 combinations. Field germination and winter survival of hybrid plants in F2 were assessed. Among all crosses, those with SHW8A-Tb and SHW9A-Tm showed highest field germination but with different degrees of spike fragility. The variation on seed number and weight per main spike was studied in F4–6 from SHW8ATb/ Progres and SHW5A-Tb/Severina crosses after individual selection for these traits. Ten lines with durum phenotype from the former and three genotypes with dicoccum plant shape from the latter cross were developed. SDS-PAGE indicated the presence of HMW-GS 1Ax2*+1Aynull subunits in four lines, among which 1Ax2* was inherited from T. boeoticum acc.110 through SHW8A-Tb. Most of the selected genotypes possessed γ-gliadin45, which was relating to good end-use quality. Powdery mildew testing showed that all progenies resulted from the SHW8A-Tb/Progres were susceptible to 12 races of the pathogen, while three lines derived from the SHW5A-Tb/Severina cross behaved differently: G32 expressed resistance to six, G33 to 2, and G34 to 5 races. The selected genotypes from crosses involving SHW with T. boeoticum exhibited good breeding performance compared to tetraploid wheat parents, and might be of breeding interest to further research

SUCCESSFUL RESUSCIТATION AND REHABILIТAТION OF А CHILD FROM ТНЕ STATE OF CLINICAL DEATH (CARDIAC ARREST), CAUSED ВУ NOVOCAIN INTOXICATION

Cases of cardiac death (cardiac arrest) caused by local anesthesia with novocain аrе rarity. According tо Waters Jimms - 1944, clinical death accidents during lосаl anesthesia аrе encountered in 0,106%. They аrе mostly casually related to hypersensibility and intolerance to novocain. Exceedingly rаrе аrе the instances of cardiac arrest, caused bу novocain intoxication.Recently, we had the possibility to observe resuscitation of а child from clinical death bу novocain intoxication, as well as its subsequent successful rehabilitation.Оn 12 September, 1964 in the Naval Hospital at Varna, the patient N. J. J., 9-year-old schoolboy (case history 845/12.IX.1963) was admitted  for tonsillectomy.  Erroneously, peritonsillar anesthesia was carried out with 10 % instead of 1 % Novocain solution, totaling a quantity of 40 ml. About 5 min, after the anesthesia the child sustains heavy epileptiform fits with loss of consciousness. Breathing is gradually delayed, becomes superficial and in 1-2 minutes it ceases completely. Several minutes later heart activity is also arrested. Dilatation of the pupils is established and reaction to light disappears. The eyeballs are softened. Full areflexia (absence of reflexes) occurs. Epinephrine, luminal, caffeine, cardiazol, plegomazin, nor-epinephrine and cortisone are administered by injection. On the 4-5th minute of cardiac arrest, the child is intubated, and after further 5 min, leftside thoracotomy and direct heart massage performed. On opening the chest cavity, the heart is found relaxed in diastole, filled up with blood. The wound is not bleeding. After nearly 40 compressions (pumping), independent cardiac activity is resumed. Blood pressure is increased up to 120/80mm of Mercury column, the pupilis are contracted. Pupillary reaction to light is restored. An hour later spontaneous breathing occurs, initially weaker and superficial (28-30 respitations per minute) and subsequently, though speeded up – with adequate depth and effectiveness. Twenty four hours later extubations is resorted to and tracheostomy applied. The operative wound of the thorax heals by first intention and no pulmonary complications occur

Androgenic response of Triticum durum-Dasypyrum villosum amphidiploids and their parental forms

Wide hybridization in cereal crops is one of the most efficient tools for the enrichment of genetic variability and addressing a number of breeding problems related to resistance and tolerance to biotic and abiotic stresses. Therefore, a large number of amphidiploids between species possessing different morphological, genetic and physiological properties have been developed. One of the most valuable species with regard to the possibilities for introducing valuable traits and properties into wheat species is the wild Dasypyrum villosum. With the aim to study the androgenic response of the Triticum durum-D. villosum amphidiploids, two accessions and their parental forms – the durum wheat cultivars Gergana and Argonavt and a landrace of the D. villosum – were studied. The following parameters were determined: callus induction, plant regeneration, yield of albino and green regenerants. It was found that the callus induction of the two studied amphidiploids differed significantly from that of the parental forms (2.1–7.2 %), being significantly higher, 30.7 and 16.5 %, respectively. Regardless of the difference in callus induction, the amphidiploids did not significantly differ from the parental forms in their regeneration ability. The yield of albino plants exceeded the yield of green regenerants and followed the tendency observed in callus induction. Green plants were found only in the amphidiploid Gergana-D. villosum and in the parental form durum wheat Gergana. Plants were regenerated from the species D. villosum, although they were only albinos, showing its good responsiveness to anther culture. The established characteristics of the amphidiploids and their parental forms make their practical use highly valuable for the improvement of different types of cereal crops

Relation between Chlamydia trachomatis, the trophoblast and preterm delivery

There is a connection between preterm labor and intrauterie infections which is well established in up to 40% of cases. Success of the interaction between the invading trophoblast at the maternal-fetal interface and the maternal immune system is an immunologically unique fact. In this process the trophoblast participates in both the immune suppression which is necessary for tolerance to the semialogenic fetus and the immune activation against damaging factors such as infections. Alterations in this type of cross-talk, as in the cases of infection-triggered inflammation by Chlamydia species, could result in pregnancy complications such as prematurity or spontaneous abortion.Related articles and clinical cases have been gathered and reviewed to establish the main mechanisms and to confirm the relationship between preterm labor and Chlamydia trachomatis infection