A Millimeter-Scale Crystal-Less MICS Transceiver for Insertable Smart Pills.

This paper presents a millimeter-scale crystal-less wireless transceiver for volume-constrained insertable pills. Operating in the 402-405 MHz medical implant communication service (MICS) band, the phase-tracking receiver-based over-the-air carrier recovery has a ±160 ppm coverage. A fully integrated adaptive antenna impedance matching solution is proposed to calibrate the antenna impedance variation inside the body.

Studying the Possibilities of Using 2-Halogen-Substituted Acetamides As Acyl Donors in Penicillin Acylase-Catalyzed Reactions.

The possibility of using amides of halogen-substituted acetic acids as acyl donors in penicillin acylase-catalyzed reactions has been investigated, and the ability of this group of compounds to inactivate enzymes in the course of the catalytic conversion has been established. The strongest inactivating effect was demonstrated by iodoacetamide and bromoacetamide. However, the negative contribution of this side activity can be minimized by decreasing the temperature, when the rate of acyl donor conversion by penicillin acylases is still high enough, but the impact of enzyme inactivation becomes less significant.

[Evaluation of immunity in children from rural localities and the levels of trace elements in environmental objects].

Immunity was evaluated in 890 schoolchildren living in rural localities of the Central and Western lands of the Orenburg Region. There was a correlation between the immunological parameters of the examinees and the levels of trace elements in environmental objects. The children's immunity showed unilateral changes in the studied parameters as compared with the regional standards.

[Comparative characteristics of environmental factors of rural localities in the area of Totsk nuclear explosion].

Environmental pollution of rural settlements in the vicinity of Totsk nuclear explosion was investigated. The findings show that the blanket of snow, soil and drinking water in the polluted area did not differ from those in the control district. High levels of stable strontium in the soil and drinking water and those of iodine in the water were detected.

[Radio-ecological and genetic assessment of late consequences of Totsk nuclear explosion].

Radio-ecological and cytogenetic assessments were made in the vicinity of Totsk nuclear explosion in the Orenburg Region. Increased contents of radioactive isotopes Cs and Pu were detected in the soil. A comparative cytogenetic analysis indicated that the population continued to be exposed to radioactive agents.

[Characteristics of the radio-ecologic situation in the area of Totsk nuclear explosion and the immune status of schoolchildren residing in the vicinity].

Environmental pollution caused by radioactive and non-radioactive chemicals, and the immunity of schoolchildren who reside in the area exposed to the Totsk nuclear explosion (1954) are comparatively analyzed. The results indicate that the area under study has higher levels of 137Cs than that of a control area. There were immunological changes in children, which are obviously associated with the nuclear explosion.

[Radiodiagnosis in the evaluation of lung dysfunction in bronchial asthma].

A combined method of x-ray and radiologic examinations of the lungs revealed in asthmatics general disorders of the ventilation and perfusion with fine functional changes, presenting as local areas of asthmatic hyperinflation, anatomically involving separate segments or lobes of the lungs. Capillary circulation disorders develop here as well. Local swelling sites are characterized by a certain mobility: they may disappear and reappear in different lung segments.

[Comprehensive radiologic examination in the diagnosis of parotid salivary gland diseases].

Comprehensive x-ray, ultrasonic and radionuclide examinations of 131 patients with chronic sialadenitis (n = 50), sialosis (n = 59), sialolithiasis (n = 9), autoimmune disorders (n = 6), and bulky processes (n = 7) of the parotid salivary glands were carried out. The diagnostic potentialities of each method in every of these conditions were analyzed. No correlation between the structural and functional disorders of the parotid glands could be traced.

[Perfusion scintigraphy in the diagnosis of lung hypoplasia in children].

Perfusion scintigraphy was used as a method of screening in children with prolonged and persistent chronic nonspecific pulmonary diseases with an obscure x-ray picture of diagnosis of lung hypoplasia. Its scintigraphic sings (considerable reduction of the capillary flow by 50%; a unilateral lesion; a clear locality of a pathological zone on a scintigram, corresponding by its volume to a lobe or the whole lung; relative uniformity of residual perfusion in the affected lobe) were detected in 21 patients. The results of scintigraphy were also used as an objective indicator for bronchopulmonary investigations and angiopulmonography.

[X-ray diagnosis of a small quantity of liquid in the pericardial cavity].

X-ray symptomatology of small pericardial effusions was studied on the basis of analysis of clinicoroentgenological and echocardiographic investigation of 173 patients with various chest diseases. Comparison of x-ray and USI results led to a conclusion of the effectiveness of polypositional roentgenography for the detection of small amounts of fluid in the pericardial cavity.

[Radiodiagnosis of a small amount of fluid in the pericardial cavity].

X-ray symptomatology of small pericardial effusions was studied on the basis of analysis of clinicoroentgenological and echocardiographic investigation of 173 patients with various chest diseases. Comparison of x-ray and USI results led to a conclusion of the effectiveness of polypositional roentgenography for the detection of small amounts of fluid in the pericardial cavity.

[Optimization of computed tomographic studies during the diagnosis of chronic nonspecific lung diseases].

A comparative study was made of computerized tomograms of 115 patients, of them 78 suffered from nonspecific chronic pulmonary diseases (chronic bronchitis, bullous emphysema, spontaneous pneumothorax, and fibrosing alveolitis), and 37 patients were healthy. Of all transverse sections the most informative ones were defined, and anatomical reference points were determined for. A conclusion was made that computerized tomograms at 5 most informative levels were sufficient to diagnose changes in each of the lung segments in their diffuse affection.

[Shigella antigens in early pathogenetic therapy of experimental acute radiation sickness].

In experiments on gamma-irradiated hamsters it is shown that antigens, obtained from Sh. flexneri and sonnei by the sparing method, have a radioprotective therapeutic action. The antigens exhibit the immunostimulating activity which is perhaps one of the aspects of the mechanism involved in the formation of resistance to infectious complications in irradiated animals and of the favourable radioprotective effect.