Investigations of lubricant rheology as applied to elastohydrodynamic lubrication

The pressure viscometer was modified to permit the measurement of viscosity at elevated pressures and shear stresses up to 5 x 10 to the 6th power N/sq m (720 psi). This shear stress is within a factor of three of the shear stress occurring in a sliding ehd point contact such as occurs in the ehd simulator. Viscosity data were taken on five lubricant samples, and it was found that viscous heating effects on the viscosity were predominant and not non-Newtonian behavior at the high shear stresses. The development of the infrared temperature measuring technique for the ehd simulator was completed, and temperature data for a set of operating conditions and one lubricant are reported. The numerical analysis of the behavior of nonlinear lubricants in the lubrication of rollers is reported

Treatment of Functional Dyspepsia in Outpatients after COVID-19 Infection

Aim: to compare the efficacy of different therapeutic regimens for managing functional dyspepsia in outpatients after COVID-19 infection.Materials and methods. 42 post-COVID-19 outpatients (age: 26–47 years) diagnosed with functional dyspepsia (FD) according to the Rome IV Criteria were enrolled in two parallel groups. All patients were divided in 2 groups by randomization: Group 1 received omeprazole at a dose of 80 mg/day, Group 2 received a combination of omeprazole and Kolofort® (a combined action drug product containing technologically processed antibodies to S100, TNF-alpha, and histamine) at a dose of 80 mg/day. At baseline and after treatment, a 10-point VAS was used to measure symptoms and an SF-36 questionnaire to evaluate the quality of life.Results. By Day 28 of the treatment, the intensity of epigastric pain (VAS score) in the group receiving proton-pump inhibitor (PPI) + Kolofort® was significantly lower. In both groups, fully resolved dyspeptic syndrome was observed in up to 90 % of patients, without significant differences (p < 0.06). According to the SF-36 data, a combination treatment resulted in higher scores (pain and general health subscales) as compared to the PPI alone.Conclusion. Kolofort® relieves symptoms and improves the quality of life when added to the treatment regimen against functional dyspepsia in post-COVID-19 patients

Підбір стерилізатора для введення in vitro донорного матеріалу досліджуваних сортів Callistephus Chinensis (L.) Ness. з метою подальшого використання в озелененні

The analysis of literary sources indicates that within the explants and in the further development of them from the regeneration plants an infection can appear on both the surface and inside the plant. This significantly reduces the frequency of division of somatic or embryonic cells and other growth rates. At the same time, some microorganisms in certain stages of reproduction may remain inactive during several transplants of culture and only then begin to multiply. The purpose of our work was obtaining sterile non-infected plant material in the process of introducing into the culture and during the period of cultivation of plants, conducting of surface sterilization of the source plant material (seed) Callistephus Chinensis (L.) Nees., depending on the composition of the nutrient medium. Sterilization of the plant material was carried out with 5-15 % solution of chloramine, and 0.01-0.1 % solution of sulam. We have chosen chloramine, sodium hypochloride and septodor-forte with different concentrations of the working solution as sterilizers. The number of genotypes that introduced was 100 seeds for all sterilizers. We have determined that the most effective sterilizer for Chinese explants of Callistephus is a 0.5 % solution of sodium hypochlorite at a sterilization exposure of 15 minutes – 98 % sterile material.За результатами аналізу літературних джерел з'ясовано, що всередині експлантів і в подальшому розвитку з них рослин-регенерантів може проявлятись інфекція, яка була як на поверхні, так і всередині рослини. При цьому істотно знижується частота поділу соматичних чи ембріональних клітин та інші показники росту. Водночас деякі мікроорганізми у певних стадіях розмноження можуть залишатися неактивними впродовж декількох пересадок культури і тільки потім починають розмножуватись. Мета нашої роботи – отримати стерильний неінфікований рослинний матеріал у процесі введення в культуру та в період культивування рослин, провести поверхневу стерилізацію вихідного рослинного матеріалу (насіння) Callistephus chinensis (L.) Nees. залежно від складу живильного середовища. Стерилізацію рослинного матеріалу виконано 5-15 % розчином хлораміну, і 0,01-0,1 % розчином сулеми. У ролі стерилізаторів обрано хлорамін, гіпохлорид натрію та септодор-форте з різною концентрацією робочого розчину. Кількість введених генотипів становила 100 насінин для всіх стерилізаторів. Визначено, що найефективнішим стерилізатором експлантів рослин калістефусу китайського є 0,5 % розчин гіпохлориду натрію при експозиції стерилізації 15 хв – 98 % стерильного матеріалу

APPLICATION OF A COMBINATION LAXATIVE IN THE TREATMENT OF CHRONIC CONSTIPATION IN PATIENTS WITH PROLONGED USE OF IRRITANT LAXATIVES

The article outlines the diagnostic criteria for chronic constipation, provides epidemiological data on the prevalence of the condition among the population, and specifies the main types of laxatives. The author presents own findings on the possibility of combined treatment with trimebutine and a combination microenema laxative for patients with “lazy bowel” syndrome which develops against a background of long-term use of irritant laxatives. The author concludes on the good tolerability and positive efficacy of the combination therapy involving drugs which normalize intestinal motility and micro-enemas containing sodium citrate, sodium lauryl sulfoacetate and sorbitol solution in such patients

Delayed colorectal cancer care during covid-19 pandemic (decor-19). Global perspective from an international survey

Background The widespread nature of coronavirus disease 2019 (COVID-19) has been unprecedented. We sought to analyze its global impact with a survey on colorectal cancer (CRC) care during the pandemic. Methods The impact of COVID-19 on preoperative assessment, elective surgery, and postoperative management of CRC patients was explored by a 35-item survey, which was distributed worldwide to members of surgical societies with an interest in CRC care. Respondents were divided into two comparator groups: 1) ‘delay’ group: CRC care affected by the pandemic; 2) ‘no delay’ group: unaltered CRC practice. Results A total of 1,051 respondents from 84 countries completed the survey. No substantial differences in demographics were found between the ‘delay’ (745, 70.9%) and ‘no delay’ (306, 29.1%) groups. Suspension of multidisciplinary team meetings, staff members quarantined or relocated to COVID-19 units, units fully dedicated to COVID-19 care, personal protective equipment not readily available were factors significantly associated to delays in endoscopy, radiology, surgery, histopathology and prolonged chemoradiation therapy-to-surgery intervals. In the ‘delay’ group, 48.9% of respondents reported a change in the initial surgical plan and 26.3% reported a shift from elective to urgent operations. Recovery of CRC care was associated with the status of the outbreak. Practicing in COVID-free units, no change in operative slots and staff members not relocated to COVID-19 units were statistically associated with unaltered CRC care in the ‘no delay’ group, while the geographical distribution was not. Conclusions Global changes in diagnostic and therapeutic CRC practices were evident. Changes were associated with differences in health-care delivery systems, hospital’s preparedness, resources availability, and local COVID-19 prevalence rather than geographical factors. Strategic planning is required to optimize CRC care