[Therapeutic and diagnostic classification of degenerative spondylolisthesis: validation and multiple-center inter-observer agreement].

Object: To evaluate inter- and intra-observer agreement of the proposed diagnostic and treatment classification of degenerative spondylolisthesis.

Material And Methods: The proposed diagnostic and treatment classification of degenerative spondylolisthesis was validated according to the GRRAS protocol. For this purpose, we retrospectively analyzed MRI, CT and spinal radiography data in 20 patients.

Development of the 174 GHz collective Thomson scattering diagnostics at Wendelstein 7-X.

In this paper, we present the design and commissioning results of the upgraded collective Thomson scattering diagnostic at the Wendelstein 7-X stellarator. The diagnostic has a new radiometer designed to operate between the second and third harmonics of the electron cyclotron emission from the plasma at 171-177 GHz, where the emission background has a minimum and is of order 10-100 eV. It allows us to receive the scattered electromagnetic field with a significantly improved signal-to-noise ratio and extends the set of possible scattering geometries compared to the case of the original instrument operated at 140 GHz.

InDel and SCoT Markers for Genetic Diversity Analysis in a Citrus Collection from the Western Caucasus.

Citrus collections from extreme growing regions can be an important source of tolerant germplasms for the breeding of cold-tolerant varieties. However, the efficient utilization of these germplasms requires their genetic background information. Thus, efficient marker systems are necessary for the characterization and identification of valuable accessions.

[Borderline personality disorder in young adults: features of psychopathology and patterns of course].

Objective: To identify the psychopathological features of borderline personality disorder (BPD) in adolescence, determine the trajectory of its further course, and develop criteria for differential diagnosis.

Material And Methods: Clinical/psychopathological and psychometric methods were used to study 143 patients. The patients were divided into two groups: a clinical group - 73 patients, who were inpatients or outpatients in the clinical departments of the Mental Health Research Center (MHRC) in 2019-2022, and a follow-up group - 70 patients who were inpatients or outpatients in the MHRC clinic in 2006-2010.

Population Analysis of in the Northwestern Caucasus Based on Leaf Morphology and Multilocus DNA Markers.

is the one of the most frost-tolerant species in the genera, used as a rootstock for colder regions. Natural populations of have a fragmented character of distribution in the Northwestern Caucasus, one of the coldest regions of cultivation. To predict the behavior of populations in an extreme environment, it is necessary to investigate the intraspecific genetic diversity and phenotypic variability of populations in the colder regions.

Supply voltage control for guaranteed performance of compact terahertz vacuum electron devices.

The results of the concept development of the universal high-voltage power supply with the output parameters providing the reliable operation of compact THz vacuum electron devices have been presented and discussed. The low-level of high-voltage ripples less than 10 ppm at 6 kV, 250 mA was obtained with the help of the designed high-precision and fast-response stabilization scheme. Real-time stabilization of the output parameters of vacuum electron devices was realized by using the multiloop proportional-integral-differential feedback control and was tested with the continuous-wave clinotron tubes in millimeter range.

Imidazol-5-one as an Acceptor in Donor-Acceptor Cyclopropanes: Cycloaddition with Aldehydes.

Spiro[imidazol-5-one-4,1'-cyclopropanes] behave as donor-acceptor (D-A) cyclopropanes in a formal cycloaddition reaction with aldehydes. The activation of such type of cyclopropanes is achieved with an equivalent of Brønsted acid. The reaction proceeds in high yields of 51-92% and demonstrates moderate diastereoselectivity at the quaternary stereocenter, which is determined by the electron-donating nature of the aldehyde partner.

Haemodynamic evaluation of the new pulsatile-flow generation method in vitro.

Continuous-flow ventricular-assist devices are widely used to support patients with advanced heart failure, because continuous-flow ventricular-assist devices are more durable, have smaller sizes and have better survival rates for patients compared to the pulsatile-flow ventricular-assist devices. Nevertheless, continuous-flow ventricular-assist devices often cause complications such as gastrointestinal bleeding, haemorrhagic stroke, and aortic insufficiency and have a negative impact on the microcirculation for both long-time implantable and short-time extracorporeal systems. The aim of this study is the evaluation of the pulsatile-flow generation method in continuous-flow ventricular-assist device without pump speed changes.

Compact radiation module for THz spectroscopy using 300 GHz continuous-wave clinotron.

The results of the development of compact radiation module based on a 300 GHz continuous-wave (CW) clinotron are presented. The clinotron oscillator is proposed as a part of the module designated for high-field dynamic nuclear polarization (DNP) systems for applications in nuclear magnetic resonance (NMR) spectroscopy. The simulation results of clinotron radiation spectra considering the influence of accelerating voltage pulsations are compared with the requirements for THz radiation linewidth for efficient NMR signal enhancement.

[Anterior stabilization of the CI-CIII vertebrae after transoral removal of an aggressive aneurysmal bone cyst of the CII vertebra (a case report and literature review)].

Unlabelled: Treatment of patients with atlantoaxial instability caused by various diseases of the skull base and craniovertebral junction combined with ventral compression of the brainstem is a complex issue that is ambiguously resolved in different ways. We present a case of stepped treatment, the most important component of which was successful transoral removal of an aggressive aneurysmal bone cyst of the CII vertebra with anterior CI-CIII segment stabilization using an individual system, which was performed through the same approach.

Clinical Case: A 31-year-old male patient presented with destruction of the CII body and odontoid process affected by an aggressive aneurysmal bone cyst causing disintegration of the CII posterior wall and odontoid process, which clinically manifested by constricted motion and pain in the cervical spine.

A novel THz-band double-beam gyrotron for high-field DNP-NMR spectroscopy.

We present the first experimental results of the study on a novel second harmonic THz-band double-beam gyrotron. The tube has demonstrated a stable single-mode operation with output parameters that are appropriate for the next-generation 1.2 GHz dynamic nuclear polarization-nuclear magnetic resonance spectroscopy.

Transoral Decompression and Stabilization of the Upper Cervical Segments of the Spine Using Custom-Made Implants in Various Pathologic Conditions of the Craniovertebral Junction.

Background: Surgical treatment of patients with atlantoaxial instability caused by pathologic changes of the skull base and craniovertebral junction combined with anterior compression of the brain stem is still associated with substantial technical difficulties and remains a matter of debate. Currently, anterior stabilization of the atlantoaxial junction is a promising approach that allows for the resection of the pathologic lesion of the skull base and craniovertebral junction with subsequent stabilization of C1-C2 or C1-C3 in 1 stage.

Methods: In this article, we present 5 clinical cases in which transoral decompression and anterior stabilization of the C1-C2 (4 cases) and C1-C3 (1 case of anteroposterior stabilization) segments with custom-made fixation systems was used to treat various pathologic conditions of the craniovertebral junction.

[HEART RATE VARIABILITY IN CHILDREN WITH FALSE CHORDS IN THE LEFT CARDIAC VENTRICULAR].

We examined 64 children with false tendons in the left cardiac ventricular. The research included evaluation of time and frequency domain parameters of the heart rhythm with cardiointervalography. The parameter changes were noted.

[Pathopsychological aspects of low back pain].

Low back pain is one of the most common causes of disability in the world. Discogenic process is the leading component of the disease. A significant part of these pain syndromes become chronic that leads to disability and social maladjustment.

Transoral Decompression and Anterior Stabilization of Atlantoaxial Joint in Patients with Basilar Impression and Chiari Malformation Type I: A Technical Report of 2 Clinical Cases.

Objective: Presentation of clinical cases involving successful anterior stabilization of the C1-C2 segment in patients with invaginated C2 odontoid process and Chiari malformation type I.

Methods: Clinical case description.

Results: Two patients with C2 odontoid processes invagination and Chiari malformation type I were surgically treated using the transoral approach.

Surgical treatment of clival and axis bone cysts.

Objective: The study objective is to present the tactics of surgical treatment of simple (solitary) bone cysts of the clival region and CII body.

Material And Methods: Two patients were operated on for simple clival and axis cysts.

Results: The first patient with a simple clival cyst underwent transoral clivectomy and bone cyst evacuation.

[Operative treatment of severe spine deformities].

87 patients with scoliosis, 32 cases with kyphosis of a various etiology were operated. Patients with severe scoliotic deformations (the total angle 75-140 [Russian character: see text]) got 2 types of the treatment. The first group consisted of 18 patients who were operated in two-stage surgery during the same anesthesia.

[Tactics of surgical treatment for an inflammatory process of C0-C(I)-C(II) segments in the craniovertebral joint instability].

Pathological processes of C0-C(I)-C(II) segments, such as the clivus, atlas arch, dens, and body of the C, vertebra pose major problems for diagnosis and treatment. On removal of a sizable pathological focus, there may be instability of the craniovertebral segment, secondary displacement, and spinal compression syndrome. Therefore these patients frequently need stabilization of the craniovertebral transition.

[Diagnosis and treatment of paretic forms of lumbar osteochondrosis].

This study was based on the analysis of the results of examination and treatment of 85 patients with lumbar osteochondrosis with paretic disturbances. The degrees of neurological disorders were analyzed by distributing these patients into three groups including patients with monoradicular, polyradicular motor disorders and circulatory disturbances in the caudal portions of the spinal cord. The informative value of the performed techniques (X-ray study, MRI, myelography, myelography with computed tomography, electroneuromyography) and the necessity of their combination for increasing the quality of diagnosis were determined.

[The health of the command officer staff doing their service in Polar regions].

Initial referral (not considering dental diseases) for the last 4 years was analyzed in servicemen from the Northern Fleet, group of navy specialists serving in Headquarters was investigated. Anamnesis and central hemodynamic parameters were studied in casual sample (388 senior officers), special questionnaires were used to determine intensity of service activity. According to the data obtained during the last 4 years level of morbidity, hospitalization and disability (without dental diseases) in servicemen constituted 857.

Impurity nuclear spin-lattice relaxation suppression and charge exchange of chromium ions in a gamma-irradiated ruby crystal.

The possibility of directly separating and measuring the impurity and lattice contributions to nuclear spin-lattice relaxation under the condition of a steady-state magnetic saturation is demonstrated in the particular case of 27Al nuclei in a gamma-irradiated ruby crystal. Contributions from trivalent and charge-exchanged chromium ions to impurity nuclear relaxation were separated. The number of charge-exchanged chromium ions was found.