ABSTRACT
A special design procedure allowing to trap layer thicknesses inside specified limits is applied for designing of antireflection coating (AR) for the infrared spectral band of 8-10 µm. The obtained AR design has no too thick layers that may cause delaminating of the deposited AR coating. A special monitoring procedure taking into account wavelength positions of monitoring signal extrema is applied for coating deposition. The manufactured coating features excellent AR properties in the requested spectral region and possesses high mechanical stability.
Subject(s)
Barium Compounds/chemistry , Fluorides/chemistry , Infrared Rays , Models, Chemical , Photometry/methods , Refractometry/methods , Scattering, Radiation , Adsorption , Barium Compounds/radiation effects , Computer Simulation , Fluorides/radiation effects , Materials TestingABSTRACT
Laser resonance ionization spectroscopy (RIS) is an excellent technique for investigating the complicated atomic structure of heavy elements especially in their higher-energy region. In order to obtain the optimal photoionization scheme of cerium atom, odd-parity high-lying states were studied using this technique. The 83 odd-parity high-lying levers have been firstly observed by two-step resonance laser excitation followed by non-resonance photoionization in the 32,042-34,575 cm-1 energy region. These high-lying states have been measured. The possible angular momentum quantum numbers J are assigned for these levels.
Subject(s)
Cerium/chemistry , Photons , Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization/instrumentation , Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization/methods , Energy Transfer , Lasers , VibrationABSTRACT
Results of cytological diagnosis in the static telepathology mode are analyzed. Three expert cytologists made the diagnosis on the basis of images of cytological preparations obtained from 94 patients with tumors of soft tissues and bones. A total of 113 diagnoses were correct: benign or malignant type of the tumor and its histological type were identified. In general, a total of 152 (88.9%) diagnoses were correct as regards their significance for treatment strategy. Errors classified as groups 3 and 4 were the most significant (erroneous assessment of tumor type--benign or malignant--in 6.4% cases). Analysis of discrepancies between cytological and pathoanatomical diagnoses and data of routine optic microscopy of similar cytological preparations of the same material (bone and soft tissue tumors) showed the same value: 6.8% of cytological and pathoanatomical diagnoses were at disagreement (groups 3 and 4 of errors). Therefore, telepathology can be resorted to for consultations and discussion of obscure cases. It is particularly important for a morphologist to discuss complex cases by means of telepathology at a specialized institution, distant from him or her.
Subject(s)
Cytodiagnosis , Telepathology , HumansABSTRACT
More than 90,000 Uzbekistan children were examined. The majority of them (83.3%) has normal physical development. In some regions the share of children with normal development was reduced. Method of investigation used in this work helps obtain objective information on the status of childhood populations and compare the results obtained in different regions.
Subject(s)
Adolescent/physiology , Child Development/physiology , Growth Disorders/physiopathology , Anthropometry , Body Height , Body Weight , Child , Child, Preschool , Female , Growth , Humans , Male , Physical Fitness , UzbekistanSubject(s)
Goiter, Endemic/epidemiology , Adolescent , Age Factors , Child , Child, Preschool , Female , Goiter, Endemic/diagnosis , Humans , Male , Sex Factors , Uzbekistan/epidemiologySubject(s)
Goiter, Endemic/prevention & control , Adolescent , Child , Child, Preschool , Female , Goiter, Endemic/epidemiology , Humans , Infant , Male , UzbekistanABSTRACT
Methods permitting to estimate parameters of hemodynamics through bioimpedance measurements have gained ground in study and diagnosis of the cardiovascular system. The error in bioimpedance measurement depends considerably on dynamic characteristics of the measuring devices being employed. The dynamic characteristics can be investigated by the method evaluating linear distortions. A relation can be established between these characteristics and errors of measuring major informative parameters of a rheographic signal.
Subject(s)
Plethysmography, Impedance/methods , Fourier Analysis , Hemodynamics , Humans , Plethysmography, Impedance/instrumentationABSTRACT
The kinetics of trypsin phosphorylation by thioesters of O-n-alkylmethylphosphonic acids, and reactivation of corresponding phosphoryl enzymes as well as kinetics of trypsin-catalyzed hydrolysis of p-nitrophenylcarboxylates have been studied. The rate constants for phosphorylation and dephosphorylation of trypsin depend on hydrophobicity of non-polar fragments in both substrate series in the same degree. On the other hand, the deacylation rate constants for a series of acyl trypsins do not change significantly while the apparent Michaelis constants change consistently with variations of non-polar acyl substituent. The study of substrate specificity of trypsin in terms of the transition state theory has allowed to elucidate the basis for low reactivity of trypsin towards the quasisubstrates.
