Cellulose Membranes in the Treatment of Spent Deep Eutectic Solvent Used in the Recovery of Lignin from Lignocellulosic Biomass.

Ultrafiltration was employed in the purification of spent Deep Eutectic Solvent (DES, a mixture of choline chloride and lactic acid, 1:10, respectively) used in the extraction of lignin from lignocellulosic biomass. The aim of this was to recover different lignin fractions and to purify spent solvent. The results revealed that the commercial regenerated cellulose membranes-RC70PP and Ultracel 5 kDa UF membranes-could be used in the treatment of the spent DES.

[Erythrocytic membrane status (as cell model) in cases of severe cranium-face trauma: possibilities for correction].

Acute posttraumatic period of severe maxillofacial trauma in case of hyperbaric oxygenation therapy is followed by expressed activation of lipide-peroxide-oxidation (LPO) in erythrocytic membrane on the background of significant reduction of the substrate for fermentative antioxidation system (AOS). Imbalance in the system LPO:AOS is followed by expressed structural reorganization in erythrocytic membrane and build-up extraerythrocytic haemoglobin in plasma. Klonidine promotes LPO activity reduction and prevents depletion of AOS fermentative capacity in membrane that is followed by normalization of structural-functional interrelations in membrane and reduction of the level of extraerythrocytic haemoglobin in plasma.

[Comparative evaluation of classical sinusotomy and endoscopic interventions on the maxillary sinus in odontogenic sinusitis with evaluation of the transporting function of ciliated epithelium and sinus aeration].

In 2002 a total of 98 patients were operated on for odontogenic sinusitis, 49 of these were operated on by endoscopic methods and the rest by classical methods. The transporting function of the epithelium in the nasal cavity and maxillary sinus and the maxillary sinus aeration were evaluated. Pneumatization of the sinus was completely restored and the transporting function of the ciliated epithelium was less disturbed in the patients operated on by the endoscopic method, that is, the mechanisms of maxillary sinus cleansing from secretions were retained, which led to stable cure.

[Effects of blood substitutes of different pharmacological groups and the mode of their injection on the bloodflow of rats].

Central and peripheral bloodflow before and after intramuscular and intravenous injections of 0.9% NaCl (control groups, n=20) and perfluothane (n=20) in a dose of 5 ml/kg was studied in 40 Wistar rats. Dopplerographic study of the bloodflow was carried out on a diagnostic device Biomedical AU-5 (Italy).

[Gun-shot wounds of the face under conditions of local and boundary conflicts].

Analysis of the incidence, types, and severity of maxillofacial wounds inflicted during local and boundary conflicts showed increased incidence of the most severe wounds with injuries to both jaws. The efficiency of medical care rendered to victims with facial wounds is determined by the level of specialized training of nurses and physician's assistants.

[Comparative clinical and x-ray evaluation of osteosynthesis methods in patients with posttraumatic defects and deformations of the upper and middle zones of the face].

The results of treatment are compared in three groups of patients treated by various methods of osteosynthesis. In group 1 (n = 203) osteosynthesis was carried out using wire suture. In group 2 (n = 231) titanic miniplates and screws were used.

[Study of protective effect of perftoran on a skin flaps].

Differences in the levels of tissue respiration in the rat skin flaps incubated in perfluothane (PF) and normal saline (NS) are regarded as an evidence of local PF effect on tissue substrate. The complex of metabolic changes in the skin fragments under the effect of PF in comparison with skin fragments incubated in NS indicate a protective effect of PF on tissue substrata. Decreased content of malonic dialdehyde and a slower accumulation of tissue liquid in skin flaps incubated in PF, in comparison with the fragments incubated in NS, is worthy of note.

[Anesthesia in cranio-facial surgery].

Reconstructive operations on the facial skeleton and on the skull have been widely introduced in surgery. Increment of indications and augmentation of traumaticity from surgical interventions pose to anesthesiologist a set of such problems, as tracheal intubation, antinociceptive protection, prevention of hepatocerebral encephalopathy. The peculiarities of cerebral and hepatic circulation and metabolism as well as approaches in anesthesia and craniofacial surgery are discussed.

[Results of the facial skull bone defects and deformations repair by modern methods for plasty and fixation of bone fragments].

Methods of reconstructive maxillofacial operations bringing about the best functional and esthetic results are analyzed. Surgical methods for repair of maxillofacial bone defects and deformations with the use of transplants and different methods of their fixation depending on the tissues at the site of defect (deformation) in patients with acquired and congenital abnormalities of the facial skull have been developed and are used at Central Institute of Dentistry. Osteosynthesis using titanium constructions and compression-distraction devices is acknowledged as an effective method of bone repair operations on the face.

[The delivery of qualified care to patients with maxillary and craniofacial pathology].

Problems of timely qualified care of patients with craniofacial injuries are discussed. The number of patients with deformations developing as a result of unqualified care is increasing. The authors validate the need in specialized centers of craniofacial surgery.

[The current potentials of maxillofacial surgery].

Autotransplants of membranous origin and titanium constructions were used in 462 patients with posttraumatic defects and deformations of the upper and medium zones of the facial skeleton. Stable functional and cosmetic results were attained in repair of diplopia and enophthalmos. Surgical methods proposed by the authors accelerate patients' rehabilitation.

[Congenital craniofacial pathology].

The possibility of using compact nonresorbed hydroxyapatite ceramics as synthetic bone plastic materials is discussed. Results of follow-up of 11 patients with congenital and posttraumatic deformations of the craniofacial skeleton are analyzed, to whom hydroxyapatite-based ceramic blocks were implanted for both contour plasty and for repair of bone defects. Methods of the operations with hydroxyapatite-based implants and titanium devices for fixing bone fragments and ceramic blocks are described.

[Endoprosthesis of the cranium and facial skull with perforated plates made of titanium].

Perforated titanium plates were effectively used as endoprostheses in 137 patients with extensive posttraumatic defects of cerebral and facial skull bones. Use of these plates appreciably accelerated the operation. Due to exceptional qualities of truly pure medical titanium these plates are absolutely biologically inert.

[The diagnosis and treatment of patients with defects and deformities of the inferior wall of the orbit].

The author analyzes surgical and diagnostic aspects of a new method for orbital bottom restoration in patients with posttraumatic deformations of the middle zone of the face. Diagnostic potentialities of panoramic sonography are demonstrated. A new method for fixation of orbital bottom fragments or osseous transplants replacing it with a metal implant introduced from the side of maxillary sinus is described in detail.

[Developmental defects of the facial the skull in some forms of craniosynostosis].

Changes in the facial skull of 74 patients with untimely synostosis of craniocerebral sutures and pathologic shape of the cerebral skull are characterized. All the patients presented with shortened base of the skull, gross deformations of the facial skull. Certain regularities in the formation of these defects were distinguished.

[The kinetics of a permanent electrical field during the knitting of mandibular fractures].

The authors' findings helped develop schedules of osteogenesis stimulation in cases when this process was shifted towards resorption (periodontosis), as well as develop a method for determining periodontitis stage and the ability of the body to regeneration.

[A comparison of clinical, x-ray and surgical data in posttraumatic deformities of the naso-orbital complex].

Observation and palpation could not fully determine the damage caused by trauma in posttraumatic patients. With intra-operation findings and X-ray imaging compared, the latter failed to reveal the full amount of bone destruction, except for the fractures of several parts of orbital interior walls at the level of lamina papyracea. The X-ray investigation routine comprising lateral observational view and medial zonography performed using an OP-6 device proved most effective.

[X-ray characteristics of changes in the jaw bones in phlegmons of the maxillofacial area].

The x-ray investigation of 445 patients with maxillofacial phlegmones showed that in 95.7% of the observations phlegmones were complicating the ongoing diseases. X-ray signs of the inflammatory changes within the bones were distinct on 3rd-4th day of the disease.