Time- and Temperature-Dependent Luminescence of Manganese Ions in Ceramic Magnesium Aluminum Spinels.

Samples of magnesium aluminum spinel ceramics doped with manganese ions were prepared by a high-temperature solid-state reaction method; their potential as red-emitting phosphors was analyzed using a time-resolved luminescence spectroscopy technique, from room temperature to 10 K. It was found that in the red spectral range, the luminescence spectra of manganese ions in the MgAlO spinel showed a narrow band peaking at 651 nm due to the emission of Mn and a broader emission band in the region of 675 ÷ 720 nm; the ratio of intensities for these bands depends on the synthesis conditions. By applying a special multi-step annealing procedure, the MgAlO:Mn phosphor containing only tetravalent manganese ions, Mn, was synthesized.

[Disorders of the anxiety-depressive spectrum in inflammatory bowel diseases (psychosomatic correlations)].

Aim: To systemize anxiety-depressive disorders in patients with inflammatory bowel diseases (IBD) and to reveal clinically relevant psychosomatic correlations.

Material And Methods: Fifty inpatients with IBD, including 32 with ulcerative colitis and 19 with Crohn's disease, were examined using clinical and follow-up methods.

Results And Conclusion: Affective mental disorders (depressions of various structures of different genesis) were found in most (72%) of cases.

Ultrasound examination with contrast in the diagnosis of inflammatory bowel disease. The results of the pilot study.

Aim: Assessment of diagnostic significance of informativeness and security of ultrasonography with contrast enhancement drug SonoVue in the diagnosis of Crohn's disease (CD) and ulcerative colitis (UC).

Materials And Methods: The pilot conducted a prospective study which involved 15 patients with inflammatory bowel disease (IBD). All patients gave written consent to participate in the study and processing of personal data.

[The etiologic diagnostics of rhinosinusitis using clinical laboratory methods].

The examination was applied to 81 children aged 5-15 years, including 64 children with diagnosis of rhinosinusitis. The control group consisted of 17 healthy children. The set of laboratory clinical diagnostic techniques was applied to detect the causes of pathology.

4f-5d Transitions of Tb3+ in Cs2NaYF6: the effect of distortion of the excited-state configuration.

The low-temperature absorption and excitation spectra of interconfigurational 4f-5d transitions of Tb(3+) in a cubic fluoride host demonstrate the appearance of a first-order linear Jahn-Teller effect for the high-spin excited states of the excited electronic configuration 4f(7)5d involving 5d t(2g) orbitals. The τ(2g) mode is observed to be responsible for the splitting of the otherwise degenerate 5d t(2g) orbitals.

Emission and excitation spectra of Ce3+ and Pr3+ ions in hexafluoroelpasolite lattices.

The emission and excitation spectra of Ce(3+) and Pr(3+) doped into the cubic host Cs(2)NaYF(6) have been recorded at room temperature and ∼10 K using synchrotron radiation. The two 5d(1) T(2g) states of Ce(3+) have been located from the excitation spectra, whereas the E(g) state is placed above the host band gap. Decay measurements of the 5d(1) → 4f(1) Ce(3+) emission, and spectra collected using selective excitation, indicate the occupation of more than one type of site by Ce(3+) in this host lattice.

Vacuum ultraviolet excitation spectra of lanthanide-doped hexafluoroelpasolites.

Vacuum ultraviolet excitation spectra at ∼10 K have been recorded for [Formula: see text] transitions of Cs(2)NaYF(6):Ln(3+) (Ln = Nd, Sm, Eu, Tb, Ho, Er, Tm). In these high bandgap hosts the lanthanide ions occupy octahedral symmetry sites. The spectra comprise broad, structured bands and in most cases the individual vibronic structure is not resolved.

Luminescence of singlet self-trapped excitons in MgF(2).

Fast (τ∼1.7 ns) broadband (full width at half-maximum = 1.1 eV) vacuum ultraviolet (VUV; hν = 8.

Inter- and intraconfigurational transitions of Nd3+ in hexafluoroelpasolite lattices.

Excitation of the 4f3 ion Nd3+ in hexafluoroelpasolite lattices by synchrotron radiation of wavelength approximately 185 nm leads to fast 4f(2)5d --> 4f3 emission below 52,630 cm(-1) and slower 4f3 --> 4f3 emission from the luminescent states (4)F(3/2) gamma8u (11 524 cm(-1)) and 2G2(9/2) gamma8u (approximately 47,500 cm(-1)). The near-infrared emission is well-resolved, and a clear interpretation of the 4I(9/2) crystal field levels and of the one-phonon vibronic sideband is given. The excitation spectrum of the 2G2(9/2) emission enables clarification of the structure of the 4f(2)5d configuration (which extends from approximately 52,000 to 128,000 cm(-1)).

[Visceral lesions in alcoholism].

Rich clinical material has been gained on carbohydrate and lipid metabolisms, cardiovascular, hepatic, pancreatic, gastric parameters in chronic alcoholics. Functional and morphological changes correlated with duration of chronic alcoholism. No definite relationship existed between the stage of alcoholism and alterations in laboratory and instrumental findings in the course of abstinence syndrome.

[Functional intestinal dyskinesias].

The authors relate the results of examining 120 patients with functional disorders of the colon. The majority of the patients manifested diverse mental abnormalities of the neurotic origin, represented by different patterns of mental pathology, somatized disturbances, neuroses and psychopathies. The conditions favouring the origin of neurotic and functional disorders have been elucidated.

[Psychosomatic correlations in patients with functional disorders of the colon].

Basing on comprehensive clinical investigations of 50 patients with colon dysfunction, relevant somatic and psychological aspects have been analysed. Colon dysfunction in shown to attend neurotic and personality disorders, to be in some cases a somatoform manifestation of endogenic depression. The majority of the patients had psychogenic neurotic affections closely related to colon dysfunction which is considered a psychosomatic pathology.

[The gastrin-producing function of the stomach in patients with chronic alcoholism].

Basal and maximum gastrin levels were measured in 81 patients with various stages of chronic alcoholism and different periods of alcohol intake, in 23 patients with chronic gastritis of nonalcohol etiology, and in 12 normal subjects. The findings permit a conclusion on the depressive effect of alcohol on the function of gastrin-producing G-cells, this resulting in lowered levels of both basal and maximal gastrin. A direct correlation between the degree of alcohol depression of gastric gastrin production and the length of alcohol consumption was revealed.

[Hepatopancreatic syndrome in chronic alcoholism].

The results of puncture biopsy of the liver, ultrasonic and angiographic investigation of the liver and pancreas in 114 patients with chronic alcoholism revealed an increment of changes in these organs in parallel with an increase in the duration of chronic alcoholic intoxication. A simultaneous study of immunoreactive insulin (IRI) and C-peptide showed that an increase in the IRI basal level in the patients suffering from alcoholism up to 10 yrs was determined mainly by an increase in the activity of beta-cells. In a long period of alcoholism an increase in the IRI basal level resulted from a decrease in the rate of insulin degradation in the liver as assessed by a lower level of C-peptide.

[Morphology and morphogenesis of chronic gastritis in patients with alcoholism].

The characteristics of all types of chronic gastritis in patients with chronic alcoholism is given. Alterations of the stomach mucous membrane in alcoholism of different duration are described in detail. The intermediate type filaments in the surface epithelium, cells of glands and macrophages are found which is reported to be a morphological manifestation of alcoholism.