The impact of Nd3+/La3+ substitution on the cation distribution and phase diagram in the La2SrAl2O7-Nd2SrAl2O7 system

Received: 28.04.2018. Accepted: 09.05.2018. Published: 10.05.2018.The effect of isovalent cation substitution of lanthanum atoms in the structure of La2SrAl2O7 oxide, and phase equilibria (solidus-liquidus curves) in the binary system La2SrAl2O7-Nd2SrAl2O7 were studied. It was found that Nd3+ substitution for La3+ has effect on the structure of La2SrAl2O7 in respect of the character of cation distribution in the solid solution La2–xNdxSrAl2O7 from statistically disordered to the ordered one where strontium cations predominantly occupied the rock-salt layers, as reflected by the solidus-liquidus lines

Diverticular disease of the colon: diagnosis, treatment, and prevention of complications

Introduction. Diverticular disease of the colon is one of the most common gastrointestinal diseases. During the last 30–40 years, there has been a “rejuvenation” of the disease. Today, the prevalence of the disease in people under 40 years of age is 5–10%, and therefore the costs of diagnostic testing and treatment are gradually increasing, which makes the disease socially significant.Aim. To study the clinical features of diverticular disease, the features of diagnosis and treatment, and prophylactic approaches. The specific objectives of the analysis were to study epidemiology; study the role and a necessary minimum set of laboratory diagnostic test methods for the diagnosis of diverticular disease; study the incidence rate of SIBO and its impact on the clinic presentation and treatment; develop an algorithm for the diagnosis, treatment, prevention, and management of patients with diverticular disease.Materials and methods. A total of 195 patients with different forms of diverticular disease were examined. As diagnostic tests, we used blood tests, stool tests, biochemical tests; inflammatory tests: calprotectin, CRP, fibrinogen, ferritin; ultrasound imaging, irrigoscopy, CT, NMR, colonoscopy (if medically required); clinical manifestations at different stages of the course of diverticular disease. 5-aminosalicylates were used to treat exacerbation with inflammation; alpha-normix and motility regulators were used to treat exacerbation without signs of inflammation.Results. On the basis of the study results, we suggested an algorithm for the diagnosis, management and treatment of patients with diverticular disease. According to the particulars of the management, it is reasonable to divide all patients with diverticular disease into three groups: 1) patients who underwent acute diverticulitis; 2) patients with uncomplicated diverticular disease; 3) patients with complicated diverticular disease.Conclusions. The first two groups should be followed up by a gastroenterologist/general practitioner, the third group should be followed up by a surgeon. The patient tested positive for SIBO should receive drugs to eradicate SIBO. The treatment regimens for exacerbation of diverticular disease are proposed

Влияние взаимозамещения редкоземельных элементов наструктуру и свойства твердых растворов (Pr, Nd, Sm)BaCoFe5+δ

Using the solid-state reaction method, (Pr,Nd,Sm)BaCoFeO5+δ solid solutions have been synthesized, their lattice constants and oxygen nonstoichiometry have been determined and their thermal expansion and electrical properties have been studied. It has been found that (Pr,Nd,Sm)BaCoFeO5+δ solid solutions show positive deviations from ideality and their structural parameters, thermal and electrotransport properties can be controlled by intersubstitution of rare earth elements in their structure.Твердофазным методом синтезированы твердые растворы (Pr, Nd, Sm)BaCoFeO5+δ, определены параметры их кристаллической структуры и кислородная нестехиометрия, изучены их тепловое расширение и электрические свойства. Установлено, что твердые растворы (Pr, Nd, Sm)BaCoFeO5+δ характеризуются положительными отклонениями от идеальности, а их структурными параметрами, тепловыми и электротранспортными свойствами можно управлять путем направленного взаимозамещения РЗЭ в их структуре

Biliary slage as a stage of gallstone disease: the successes and difficulties of treatment

Introduction. The high prevalence rates of biliary sludge and its frequent development into the stone stage of cholelithiasis constitute grounds for studying this issue, as the effective action on biliary sludge can prevent overall disease progression.Purpose of the study. To determine the options for diagnosis of biliary sludge in the polyclinic settings. Objectives: 1) Estimate the frequency of diagnosis of biliary sludge. 2) Assess the features and dependence of treatment on the type of biliary sludge. 3) Assess the outcome of treatment depending on the follow-up managing of patients. 4) Propose an algorithm for managing patients after biliary sludge has been diagnosed.Materials and methods. In the work used data of the clinics of the President of the Russian Federation. The total number of people surveyed for 1 year was 1.117. These patients underwent an ultrasound examination (dispensation) and 218 were fitted with biliary sludge (BS), which was 19.4%. Of the 70 patients with BS, 4 groups were formed: 1st group (20 patients) with BS type, 2nd (20 patients) – with BS type, 3rd (20 patients) – with BS type, 4th (10 patients) – with BS-type (BSS) type.All patients received Exchhol therapy at the rate of 15 mg/kg of weight; patients with a pronounced spastic component in the sphincter system – myotropic spasmolytic Sparex (20 mg x 2 times a day); patients of the 4th group (with a near-located sediment indicating the presence of inflammation) – Adisord (derived nitrofuran) 200 mg x 4 times a day (5 days).Results. The type of precipitation was cupped in 4 weeks of treatment; Type – for 8–12 weeks of treatment, type V – for 13–14 weeks.Conclusions. The presented data allow us to hope that early diagnosis of biliary sludge and the factors of its development will help start timely treatment and prevention of the disease

Modelling fluid loss faults in an industrial pressure sensor

The efficient operation of industrial processes requires the timely and accurate diagnosis of faults in process equipment, particularly sensors, as acting on faulty measurement data can result in inefficient or dangerous operation. A common fault mode in industrial pressure sensors is mechanical damage resulting in the leakage of the internal oil (used to transmit external pressure to the sensing element) and the development of an air pocket within the device. In previous work, we have experimentally determined the faulty measurement characteristics of a commercial pressure sensor, where the sensor manufacturer has provided modified sensors with calibrated degrees of oil loss. The current paper develops a mathematical model of this tensoresistive pressure sensor, which describes and explains the impact that oil loss, and hence the presence of an air pocket, has on the static measurement response