Inhibition Effect of Tetraethanol-b-Octadecenyl Succinylamide in Acidic Corrosion of Carbonized Steel

The influence of tetraethanol-b-octadecenyl succinylamide (TOSA) on the corrosion of steel in H2S04 and HC1 solutions of divers concentrations has been studied using gravimetrical, electrochemical and polarization corrosion test methods. It has been observed that the TOSA behaves as an inhibitor of molecular active cathodic type and has inhibition effect at the beginning stage of corrosion in both acids, but more effectively in H2S04. It is shown that the inhibition effect of the TOSA increases with temperature increasing from 91 % at 20 °C to 100% at 80 °C in 0.5 N H2S04 solution and decreases with temperature increasing for higher concentrations of acid solutions. From obtained electrocapillary curves it is evidenced that the TOSA is a primarily additive of molecular type (insignificant shift of the maximum to the positive side on the curves). Moreover, it is surface active compound those superficial strength substantially decreases in H2S04 (30 dyn/cm) and HCl (34.9 dyn/cm) solutions. It has been shown that the TOSA has a high protection effect and high formation rate of adsorption layer on the metal surface in H2S04 (y = 96.4 % and t = 8.0 min) and HC1 (y = 91.5 % and t = 4.0 min)

The experience of interaction of South Ural State Technical College and employers

The article discusses the areas of interaction of the educational institution with the industry in the preparation of future specialistsВ статье рассматриваются направления взаимодействия образовательного учреждения с предприятиями отрасли при подготовке будущих специалисто

On the Two Spectra Inverse Problem for Semi-Infinite Jacobi Matrices

We present results on the unique reconstruction of a semi-infinite Jacobi operator from the spectra of the operator with two different boundary conditions. This is the discrete analogue of the Borg-Marchenko theorem for Schr{\"o}dinger operators in the half-line. Furthermore, we give necessary and sufficient conditions for two real sequences to be the spectra of a Jacobi operator with different boundary conditions.Comment: In this slightly revised version we have reworded some of the theorems, and we updated two reference

The Two-Spectra Inverse Problem for Semi-Infinite Jacobi Matrices in The Limit-Circle Case

We present a technique for reconstructing a semi-infinite Jacobi operator in the limit circle case from the spectra of two different self-adjoint extensions. Moreover, we give necessary and sufficient conditions for two real sequences to be the spectra of two different self-adjoint extensions of a Jacobi operator in the limit circle case.Comment: 26 pages. Changes in the presentation of some result

Healthy lifestyle discussions between healthcare providers and older cancer survivors: Data from 12 cancer centers in the Southeastern United States

Abstract Background Little is known about the prevalence of healthy lifestyle (HLS) discussions between providers and older cancer survivors. Methods We utilized cross‐sectional data from older cancer survivors (≥65 years) seen at 12 southeastern cancer centers during 2013‐2015. Data on demographics, time since diagnosis, weight, height, and healthy behaviors were collected. Respondents were asked if providers (oncologists, other physicians, and/or nurses) discussed exercise, healthy diet, weight management, and/or smoking cessation during clinical encounters. Descriptive statistics and bivariate associations between HLS topics and survivor characteristics were calculated. Results Among 1460 cancer survivors, mean age was 74 years (SD 6), most were white (81%), and >1 year postdiagnosis (84%). The majority (71%) reported discussing at least one of three HLS topics (exercise 49%, healthy diet 53%, vegetable consumption 28%); 17% received counseling on all three. Weight loss was recommended to 33% of overweight/obese survivors and smoking cessation to 85% of current smokers. Oncologists and nurses discussed HLS less frequently compared to other physicians. Younger survivors (65‐74 years) received recommendations for exercise, weight loss, and tobacco cessation more often than older survivors (≥75 years). Compared to white respondents, minorities reported discussions on all topics more often except for tobacco cessation. Excluding tobacco cessation, survivors with recent cancer diagnoses (1 year postdiagnosis. Conclusion Despite the American Cancer Society's recommendations, older survivors reported a low prevalence of HLS discussions with their providers, with some variation by demographic groups. Strategies are needed to promote these important discussions in this population

Healthy lifestyle discussions between healthcare providers and older cancer survivors: Data from 12 cancer centers in the Southeastern United States

Abstract Background Little is known about the prevalence of healthy lifestyle (HLS) discussions between providers and older cancer survivors. Methods We utilized cross‐sectional data from older cancer survivors (≥65 years) seen at 12 southeastern cancer centers during 2013‐2015. Data on demographics, time since diagnosis, weight, height, and healthy behaviors were collected. Respondents were asked if providers (oncologists, other physicians, and/or nurses) discussed exercise, healthy diet, weight management, and/or smoking cessation during clinical encounters. Descriptive statistics and bivariate associations between HLS topics and survivor characteristics were calculated. Results Among 1460 cancer survivors, mean age was 74 years (SD 6), most were white (81%), and >1 year postdiagnosis (84%). The majority (71%) reported discussing at least one of three HLS topics (exercise 49%, healthy diet 53%, vegetable consumption 28%); 17% received counseling on all three. Weight loss was recommended to 33% of overweight/obese survivors and smoking cessation to 85% of current smokers. Oncologists and nurses discussed HLS less frequently compared to other physicians. Younger survivors (65‐74 years) received recommendations for exercise, weight loss, and tobacco cessation more often than older survivors (≥75 years). Compared to white respondents, minorities reported discussions on all topics more often except for tobacco cessation. Excluding tobacco cessation, survivors with recent cancer diagnoses (1 year postdiagnosis. Conclusion Despite the American Cancer Society's recommendations, older survivors reported a low prevalence of HLS discussions with their providers, with some variation by demographic groups. Strategies are needed to promote these important discussions in this population