Integrated Sea Surface Temperature Products within a Coastal Ocean Observing System

Non

Manual of therapeutic stomatology. Pt. 2

СТОМАТОЛОГИЯ ТЕРАПЕВТИЧЕСКАЯРУКОВОДСТВАИНОСТРАННЫЕ СТУДЕНТЫСТОМАТОЛОГИЯ ЛЕЧЕБНО-ВОССТАНОВИТЕЛЬНАЯСТОМАТОГНАТИЧЕСКИЕ БОЛЕЗНИ /ТЕРАПИЯСТОМАТОЛОГИЯУЧЕБНО-МЕТОДИЧЕСКИЕ ПОСОБИЯВ пособии освещены вопросы лечения стоматологических болезней

Reaction of 5-benzalbarbituric acid with trimethyl phosphite and tri(dimethylamino) phosphine

1. Trimethyl phosphite at -14° adds to 5-benzalbarbituric acid to give the (1:1) adduct with a bipolar structure, which then isomerizes to the methyl ester of the enol form of the dimethyl ester of barbituryl-5-benzylphosphonic acid. The latter is also formed by running the reaction at room temperature. 2. In the presence of glacial acetic acid, trimethyl phosphite reacts with 5-benzalbarbituric acid to give the dimethyl ester of barbituryl-5-benzylphosphonic acid in the enol form. 3. The reaction of tri(dimethylamino)phosphine with 5-benzalbarbituric acid gave the crystalline (1:1) adduct, which has the structure of a bipolar ion containing the P-C bond. © 1971 Consultants Bureau

Optical echo in photonic crystals

The dynamics of photonic wavepacket in the effective oscillator potential is studied. The oscillator potential is constructed on a base of one dimensional photonic crystal with a period of unit cell adiabatically varied in space. The structure has a locally equidistant discrete spectrum. This leads to an echo effect, i.e. the periodical reconstruction of the packet shape. The effect can be observed in a nonlinear response of the system. Numerical estimations for porous-silicon based structures are presented for femtosecond Ti:Sapphire laser pump.Comment: 4 page

Physical well-being of teachers as a factor in the effectiveness of their professional activities

The urgency of the problem in the present study is associated with dramatic changes in the system of contemporary Russian education, which, on the one hand, are positive, and on the other contribute to emotional stress. Teacher, experiencing a state of stress, negatively affects students, transferring their negative emotions and often exerting a negative impact. Even those teachers who try to resist are also prone to burnout and psychosomatic diseases in these conditions. The article is devoted to the identification and analysis of cognitive and emotional changes of teachers, and their correlation with nosological form of cardiovascular disease, identifying the features of psychological, emotional states depending on earlier diagnosis. Mental status of the teacher is reflected in his personality changes in behaviour. The materials are based on the results of studies of physical well-being of teachers and its impact on the quality of the solution of pedagogical tasks. The study was conducted on the basis of the therapeutic department of the polyclinic № 1 in Togliatti. Experimental data confirm that stressful situations characteristic of the educational activities provoke diseases, which are a response to external negative impacts

Reaction of l, 2-diphenyl-4-benzal-3,5-pyrazolidinedinone with trimethyl phosphite and tri(dimethylamino)phosphine

1. Trimethyl phosphite reacts with 1,2-diphenyl-4-benzal-3,5-pyrazolidinedione via the step of the bipolar ion with the formation of the methyl ether of the enolic form of the dimethyl ester of 1, 2-diphenyl-3,5-pyrazolidinedione-4-benzylphosphonic acid. 2. The reaction of tri(dimethylamino)phosphine with 1,2-diphenyl-4-benzal-3,5-pyrazolidinedione gave a stable adduct (1:1), which has the structure of the bipolar ion with a P-C bond. © 1974 Consultants Bureau

Structure of reaction products of some α, β-unsaturated carbonyl compounds with trimethyl phosphite and tri(dimethylamino)phosphine

1. Trimethyl phosphite adds to 1,3-diphenyl-5-benzalbarbituric acid at -14°C to give a 1:1 adduct with a bipolar structure, which isomerizes to the methyl ether of the enolic form of the dimethyl ester of α-(1,3-diphenyl-5-barbituryl)benzylphosphonic acid. The latter is also formed when the reaction is run at room temperature. 2. The hydrolysis of the methyl ether of the enolic form of α-(1,3-diphenyl-5-barbituryl)benzylphosphonic acid leads to the formation of the enolic form of the dimethyl ester of α-(1,3-diphenyl-5-barbituryl)·benzylphosphonic acid. 3. The reaction of tri(dimethylamino)phosphine with 1,3-diphenyl-5-benzalbarbituric acid gave the crystalline 1:1 adduct, which had the structure of a bipolar ion containing the P-C bond. 4. The values of the dipole moments, as well as the parameters of the UV spectra, are given for a number of bipolar ions that were obtained using tri(dimethylamino)phosphine. © 1972 Consultants Bureau

Interaction of 2-benzylidenindandione-1,3;2-benzylidene-3(2h)-thionaphthenone-1,1-dioxide, and benzalbindone with trimethyl phosphite and tri-(dimethylamino)phosphine

1. In the absence of moisture trimethyl phosphite is added to benzalbindone in CH2C12 solution at the benzylidene double bond, forming a (1:1) adduct with bipolar structure, which isomerizes to the methyl ether of the enol form of the dimethyl ester of bindonylbenzylphosphinic acid (III). The latter is also formed when the reaction is conducted in the absence of a solvent at room temperature. 2. In the interaction of trimethyl phosphite with benzalbindone in the presence of glacial acetic acid, the dimethyl ester of bindonylbenzylphosphinic acid is formed. 3. In the interaction of tri(dimethylamino)phosphine with benzalbindone, 2-benzylidenindandione-1,3, and 2-benzylidene-3(2H)-thionaphthenone-1,1-dioxide, crystalline (1:1) adducts were obtained, possessing the structure of bipolar ions with a P-C bond. 4. The structures of all the products obtained were confirmed by the IR spectra and the data on the chemical shifts of the phosphorus nucleus. © 1970 Consultants Bureau