Influence of urea-formaldehyde oligomer composition on technical paper properties

The article studies the influence of urea-formaldehyde oligomers on technical properties of paper types. The influence of the studied oligomers on the electrokinetic properties and the ability to dehydrate water-fibrous suspensions. Shows the effect of modified oligomers on the hydrophobic and physical-mechanical properties of the paper samples. It was established that the modification of the aminoformaldehyde oligomer lactams ?-aminocaproic acid affects the efficacy of the products obtained for improving the strength of paper

The influenсe of structure and the weight of one square meter of elementary layers on properties of printing cardboard

The comparative analysis of the received experimental data testifies that, properties of printing cardboard essentially depend on structure and the weight of one square meter of its elementary layers. We defined the preferable structure of top layer (40% of bleached softwood sulphate cellulose and 60% of white paper for recycling of mark МB-1), intermediate layer (40% of bleached softwood sulphate cellulose and 60% of white paper for recycling of mark МB-2) and primary layer (60% of modular paper for recycling of mark МС-5B and 40% of white paper for recycling of mark МB-1), the layers differ in the weight of one square meter. The printing cardboard possesses the demanded physicomechanical characteristics corresponded to ТURB 00280146.030-98 in that case when the weight of one meter square is 60 g for the top layer, 50 g for the intermediate and 130 g for the primary layer

Influence of urea-formaldehyde oligomer composition on technical paper properties

The article studies the influence of urea-formaldehyde oligomers on technical properties of paper types. The influence of the studied oligomers on the electrokinetic properties and the ability to dehydrate water-fibrous suspensions. Shows the effect of modified oligomers on the hydrophobic and physical-mechanical properties of the paper samples. It was established that the modification of the aminoformaldehyde oligomer lactams ?-aminocaproic acid affects the efficacy of the products obtained for improving the strength of paper

The influenсe of structure and the weight of one square meter of elementary layers on properties of printing cardboard

The comparative analysis of the received experimental data testifies that, properties of printing cardboard essentially depend on structure and the weight of one square meter of its elementary layers. We defined the preferable structure of top layer (40% of bleached softwood sulphate cellulose and 60% of white paper for recycling of mark МB-1), intermediate layer (40% of bleached softwood sulphate cellulose and 60% of white paper for recycling of mark МB-2) and primary layer (60% of modular paper for recycling of mark МС-5B and 40% of white paper for recycling of mark МB-1), the layers differ in the weight of one square meter. The printing cardboard possesses the demanded physicomechanical characteristics corresponded to ТURB 00280146.030-98 in that case when the weight of one meter square is 60 g for the top layer, 50 g for the intermediate and 130 g for the primary layer

Schizophrenia-like disorder in Wilson's disease

Wilson's (Wilson–Konovalov) disease (WD) is a chronic progressive disease resulting from impaired body copper metabolism with damages to target organs (liver, brain, and kidneys). The paper describes a clinical case of organic delusional (schizophrenia-like) disorder in a patient with WD. The characteristic feature of its psychiatric onset in the patient is schizophrenia-like disorders in the absence of neurological and gastroenterological symptoms. Because of this onset of WD, patients have not received specific treatment for a long time (frequently before the appearance of the Kayser–Fleischer rings or the occurrence of cirrhosis). Thus, the diagnostic search should include WD in young patients with a primary psychotic episode. The search for early effective methods for WD verification is of interest for further investigations

Autologous Biological Glue and Aprotinin Prevent Ischemia in Latissimus Dorsi Muscle after Mobilization

The hemodynamic results of cardiomyoplasty, a promising form of surgical treatment for end-stage heart failure, do not support the subjective improvements seen clinically. We hypothesized that this disparity might be due to ischemia-reperfusion injury to the latissimus dorsi muscle (LDM) after mobilization. Having tested autologous biological glue (ABG) as a protective layer around traumatized muscle, as a means for facilitating revascularization, and as a drug depot to reduce local ischemia-reperfusion lesions, we wanted to determine if this protective and revascularization effect could be enhanced by adding aprotinin, a natural inhibitor of serine proteinases with the potential for preventing proteolytic degradation. To test for muscle damage and angiogenesis, we created pockets out of ischemic and nonischemic LDM. The control group had pockets without additives; the second group had pockets with ABG only; and the third had pockets with ABG and aprotinin. Light microscopy revealed that pockets treated with ABG, either alone or with aprotinin, had less leukocyte margination, fibrosis, calcified necrosis, and fibrous degeneration than in controls. In control pockets, after 56 days, capillaries occupied 4.1 ± 0.3 % of the area in nonischemic LDM and 3.6 ± 0.7 % in ischemic LDM (p> 0.05). In pockets treated with ABG only, capillaries occupied 5.5 ± 0.2% (p < 0.05) of the area in ischemic LDM; in pockets treated with ABG and aprotinin, 8.5 ± 1.1% (p < 0.05) area was occupied with capillaries. This data confirmed our hypothesis that aprotinin added to ABG prevents ischemia-reperfusion lesions after muscle mobilization, and enhances capillary ingrowth in both the ischemic muscle and the interlayer between ischemic and nonischemic muscle. Key words: cardiomyoplasty, LDM ischemia, autologous biological glue, aprotinin