Viscous terahertz photoconductivity of hydrodynamic electrons in graphene.

Light incident upon materials can induce changes in their electrical conductivity, a phenomenon referred to as photoresistance. In semiconductors, the photoresistance is negative, as light-induced promotion of electrons across the bandgap enhances the number of charge carriers participating in transport. In superconductors and normal metals, the photoresistance is positive because of the destruction of the superconducting state and enhanced momentum-relaxing scattering, respectively.

High-Mobility Compensated Semimetals, Orbital Magnetization, and Umklapp Scattering in Bilayer Graphene Moiré Superlattices.

Twist-controlled moiré superlattices (MSs) have emerged as a versatile platform for realizing artificial systems with complex electronic spectra. The combination of Bernal-stacked bilayer graphene (BLG) and hexagonal boron nitride (hBN) can give rise to an interesting MS, which has recently featured a set of unexpected behaviors, such as unconventional ferroelectricity and the electronic ratchet effect. Yet, the understanding of the electronic properties of BLG/hBN MS has, at present, remained fairly limited.

Endoscopic treatment of mine-explosive spine injuries: 3 clinical cases and literature review.

Unlabelled: Modern warfare is characterized by common mine-explosive injuries. The last ones are accompanied by multiple injuries, large area of damage and severe clinical status of victims.

Objective: To demonstrate treatment of mine-explosive spinal injuries using modern minimally invasive endoscopic techniques.

Laminoplasty versus Laminectomy in the Treatment of Primary Spinal Cord Tumors in Adult Patients: A Systematic Review and Meta-analysis of Observational Studies.

The present systematic review and meta-analysis was conducted to compare the safety and efficacy of the two approaches for primary spinal cord tumors (PSCTs) in adult patients (laminoplasty [LP] vs. laminectomy [LE]). LE is one of the most common procedures for PSCTs.

Percutaneous Transforaminal Full-Endoscopic Removal of Neurinoma of the Fifth Lumbar Nerve Root With Intraoperative Neuromonitoring: A Case Report.

Background: Technical achievements and surgical techniques improvement contribute to the expansion of the endoscopic spine surgery possibilities. However, today there are few reports about the use of percutaneous endoscopy in spinal tumor surgery. A case of percutaneous transforaminal endoscopic removal of the lumbar spinal nerve tumor with intraoperative neuromonitoring is presented.

Calcium Hydroxyapatite Filler With Integral Lidocaine CaHA (+) for Soft Tissue Augmentation: Results from an Open-Label Multicenter Clinical Study.

Background: Soft tissue augmentation with calcium hydroxylapatite (CaHA) is a versatile technique for line filling, skin tightening, lifting, contouring, and volumizing. The present study was designed to confirm safety and effectiveness of the product with lidocaine (CaHA (+)) in a holistic treatment of nasolabial folds (NLFs), marionette lines, and/or cheeks.

Methods: A total of 207 subjects with moderate to severe facial volume deficit were treated with CaHA(+) in this open-label study.

Case Report: Full-Endoscopic Surgery for Bullet Wounds of the Spine: A Report of Three Cases.

Objectives: To determine the feasibility and evaluate effectiveness of full-endoscopic surgery in gunshot wound of the spine.

Methods: Three clinical cases of lumbar and thoracic spine bullet wounds made by firearms and traumatic weapons are described. Percutaneous endoscopic surgery was performed to extract bullet from the spinal canal.

Facial Skin Revitalization with Cohesive Polydensified Matrix-HA20G: Results from a Randomized Multicenter Clinical Study.

Background: There is a growing interest in the application of hyaluronic acid (HA) derivatives in skin quality improvement. The aim of this study was to confirm safety and effectiveness of cohesive polydensified matrix-hyaluronic acid + glycerol (CPM-HA20G; Belotero Revive) in revitalization of early-onset photodamaged facial skin.

Methods: A total of 159 subjects with early signs of facial photodamaged skin were randomized in a 2:1 ratio to multiple- or single-dose treatment with CPMHA20G.

[Synchronous schwannoma and ependymoma of the cauda equina].

The article presents a case of surgical treatment of primary multiple benign tumors of the cauda equine of different histological origin: spinal nerve root schwannoma and ependymoma of the filum terminale.

Effectiveness evaluation of two volumizing hyaluronic acid dermal fillers in a controlled, randomized, double-blind, split-face clinical study.

Background: Enhancement of the midface can be achieved with volumizing hyaluronic acid (HA) fillers.

Objective: The objective of this study was to compare the safety and effectiveness of Cohesive Polydensified Matrix 26 mg/mL HA gel (CPM-26) and Vycross 20 mg/ml HA gel (VYC-20) in a controlled, randomized, evaluator-blind, split-face clinical study.

Patients And Methods: Subjects with moderate-to-severe malar volume loss on the Merz Aesthetics Scale (MAS) received CPM-26 on one side and VYC-20 on the contralateral side of the face.

Mid-Face Volumization With Hyaluronic Acid: Injection Technique and Safety Aspects from a Controlled, Randomized, Double-Blind Clinical Study.

Unlabelled:

Treatment of Age-related Mid-face Atrophy by Injection of Cohesive Polydensified Matrix Hyaluronic Acid Volumizer.

Objective: Cohesive Polydensified Matrix® Hyaluronic Acid Volumizer is designed to be injected subcutaneously or in deeper soft tissue layers to restore facial volumes. This post-marketing clinical follow-up was performed to confirm the safety and effectiveness of the product up to 18 months.

Design: Injections were performed according to standard clinical practice and patients were followed-up at Months 1, 3, 6, 9, 12, and optionally at Month 18.

[Aggressive vertebral hemangiomas: optimization of management tactics].

Today vertebral hemangioma is not completely understood entity, neither its pathogenesis nor optimal treatment is determined. Nowadays in majority of clinics in this country ineffective radiotherapy remains the first-line treatment. We analyzed results of treatment of 205 patients (286 lesions) with aggressive hemangiomas operated in Department of Neurosurgery of Military Medical Academy and Department of Nuclear Medicine of of Russian Scientific Center of Radiological and Surgical Technologies (Saint-Petersburg, Russia) since 1999 till 2009.

[Initial experience of using XperCT in neurosurgery].

Modern angiographic complexes allow performing emulation of computed tomography (CT). Comparison of the resolving power of XperCT and CT indicated sufficient sensitivity of the new technology in detection of focal lesions of the brain, the possibility of its application in interventional neuroradiology. The application of XperGuide allows control the position of the instrument during operation directly without using additional equipment of moving the patient.