Photoelectrochemical behavior of the ternary heterostructured systems CdS/WO3/TiO2

In this article, we report the results of comparative studies of photoelectrochemical behavior of the binary CdS/TiO2 and WO3/TiO2 and ternary CdS/WO3/TiO2 heterostructures based on titania nanotube and planar structures. Physical–chemical characterization by XRD, XPS, and electron microscopy methods together with electrochemical impedance spectroscopy measurements confirm a successful formation of heterostructured electrodes, both nanotube-based and planar. The results of photoelectrochemical studies of the heterostructures demonstrate a significant difference in their behavior depending on the structure geometry and the character of the formed heterojunctions. It is concluded that nanotube-based heterostructure electrodes can be characterized by a stochastic set of different heterojunctions while planar systems demonstrate well-ordered heterojunctions with a strictly defined electron transfer direction. Particularly, we demonstrate the possibility of the realization of Z-scheme of photoexcitation and charge separation in ternary planar systems under visible light irradiation

STUDY OF COMPOSITION OF PHENOLIC COMPOUNDS OF HERBAL REPERTORY “EUPHRASIN” BY HPLC METHOD

The study refers to the research of phenolic compounds of herbal repertory "Euphrasin". This research was done with the HPLC method and was studied with "G1LSTON" instrument. 17 peak identities were monitored in alcohol extracts of herbal repertory "Euphrasin". Compared with reliable samples 15 compounds that belong to the group of flavonoids, phenolcarbonic acids and tannins were identified. Hyperoside (6,91 %), gallic acid (25,88 %) and tannin (17,07 %) are dominant components

Accumulation dynamics of phenolic compounds in the aboveground organs of Euphrasia pectinata Ten., growing in the Central Siberia

A plant of the Euphrasia L. genus is promising to be introduced into medical practice and being used in traditional medicine for eye, gastrointestinal tract, upper respiratory tract disease treatment. Euphrasia pectinata Ten is widespread and growing abundantly in the Central Siberia. Study of the composition and quantitative content of phenolic compounds of Euphrasia pectinata Ten. growing in Irkutsk Region was studied by HpLC method. Organ-specific distribution and dynamics of accumulation depending on the phase of vegetation of 8 compounds (3-O-caffeoylquinic acid(chlorogenicacid), hyperozide, acteoside, cynaroside, diosmetin-7-O-β-D-glucuronide, dihydroquercetin, luteolin, quercetin) were studied. The maximum of flavonoid glycosides is accumulated in flowers and leaves, and the maximum of flavonoid aglycone is accumulated in stems. The maximum quantity of flavonoids in aboveground organs is observed in the flowering period, and maximum of phenylethanoid acteoside is observed in the fruiting period. Thus, as a medicinal plant, the materials can be recommended for harvesting of the aboveground organs E. pectinata during the flowering period

Влияние технологических параметров процесса окисления гудронов на показатели качества битумов

In this paper the influence of the conditions of the heavy oil raw materials oxidation process on the quality characteristics and paramagnetism of oxidized bitumen has been investigated.В работе исследовали влияние условий процесса окисления тяжелого нефтяного сырья на показатели качества и парамагнетизм окисленных битумов

Echinococcal Cyst Blockade — the Rare Cause of Acute Pancreatitis and Obstructive Jaundice

Aim: demonstrate an algorithm for the diagnosis and treatment of acute pancreatitis and obstructive jaundice caused by obstruction of the terminal part of the common bile duct by daughter echinococcal cyst.Key points. The article presents a clinical case of acute echinococcal obstruction of the terminal part of the common bile duct in a patient with a complicated course of liver echinococcosis. A 33-year-old man was hospitalized with epigastrium and right hypochondrium pains and jaundice. In 2019 the patient underwent the removal of a cyst in the 7th liver segment and cholecystectomy for liver and gallbladder echinococcal lesions. Laboratory research revealed leukocytosis, hyperbilirubinemia and an increase in the transaminases level. Transabdominal ultrasound showed signs of dilatation throughout bile ducts. Duodenoscopy revealed a fixed yellowish-white oval formation with transluent capsule, completely blocking bile and pancreatic juice outflow at the major duodenal papilla. After non-annulation endoscopic papillotomy, migration of the substrate (echinococcal cyst) into the duodenum was noted, active flow of bile and pancreatic secretions was restored. Oral transpapillary cholangioscopy was performed for a detailed bile ducts examination. It revealed no echinococcal cysts, residual parasitic structures or biliary tree lesions. The treatment was completed with pancreatic stenting. After complex treatment in the intensive care and surgery unit with complete condition stabilization, the patient was discharged with recommendations for further treatment in a specialized clinic.Conclusion. Migration of a daughter cyst from the echinococcal liver focus can cause acute blockade of the terminal part of the common bile duct and acute obstructive pancreatitis. The combination of clinical, radiological and endoscopic methods allows to diagnose and eliminate this rare complication of liver echinococcosis with subsequent successful treatment

Etiology of influenza-like illnesses in the population of Novosibirsk city in the 2018–2019 epidemic season

Influenza and other acute respiratory viral infections lead to a substantial incidence of severe cases and hospitalizations and so remain a global health problem. Within the frame of the Global Influenza Hospital Surveillance Network (GIHSN), we assessed the contribution of influenza and other respiratory viruses to severe cases of influenzalike diseases in patients hospitalized to the Novosibirsk infectious hospitals in the years 2018–2019. We analyzed 484 nasopharyngeal swabs collected from patients admitted to the hospitals with acute respiratory infections (ARI) using real-time polymerase chain reaction commercial kits. We confirmed viral etiology of ARI in 69.8% cases. Influenza viruses were detected in 47.1% cases, wherein concomitant circulation of influenza A(H1N1)pdm09 and A(H3N2) viruses was observed in 20.7% and 26% of patients, respectively, whereas influenza B virus was detected only in one sample. All analyzed influenza A viruses were antigenically similar to vaccine strains. Genetically, the Novosibirsk strains were closely related to influenza A viruses distributed in Russia and worldwide. Influenza A(H1N1)pdm09 virus was detected in all patients aged 0 to 14 years and required intensive care. Other respiratory viruses were detected in 36.4% of children and 5.8% of adults, and 8.3% of children had viral coinfection, whereas no cases of coinfection were detected in adults. The most common viruses in children were metapneumovirus — 12.8%, rhinovirus — 9.3% and respiratory syncytial virus — 8.0%. In adults, metapneumovirus, adenovirus, parainfluenza virus and rhinovirus were detected with a detection rate no exceeding 2%. In this study, we found no differences in the detection rate of the influenza virus due to concomitant chronic diseases, pregnancy, or smoking habits. At the same time, the detection rate of other respiratory viruses in non-smokers vs. smokers was significantly lower than in smokers and former smokers (26.15%, 66.67% and 62.50%, respectively). In addition, the level of detection of respiratory viruses in children with vs. without chronic pathology was significantly higher (55.3% and 38.7%, respectively). Thus, our and similar studies are important for monitoring and control of the infection

Вариант вируса гриппа в, адаптированный к мышам, для изучения лечебной и профилактической эффективности противовирусных препаратов in vitro и in vivo

Objective: to develop a new antigenic relevance influenza B virus suitable for modeling influenza infection in mice to assess of in vivo and in vitro therapeutic and preventive efficacy of antiviral drugs.Materials and methods: was carried out an adaptation of influenza B virus in BALB/c mice. Was performed, comparative assessment of in vivo and in vitro pathogenicity of the parenta! virus and. adapted, influenza B virus. Was assessed, inhibition of neuraminidase with antiviral drugs (oseltamivir ethoxyacrylate and. Tamiflu) in relation to the adapted, influenza B virus.Results: adapted  influenza B virus (B/Novosibirsk/40/2017-MA strain) models non-lethal influenza infection with pronounced, clinical signs of the disease in experimental animals. Were described the destructive changes in lungs and. brain that increases during infection. Analysis of internal organs (lungs, brain, liver, heart, kidneys, spleen) were revealed viral load only in the lungs. Were evaluated, in vivo and in vitro efficacy of antiviral drugs (oseltamivir ethoxysuccinate and Tamiflu®) on the model of influenza infection. Were proved, the high, efficiency of the innovative drug — oseltamivir ethoxysuccinate.Conclusion: the antigen-relevant adapted, influenza B virus (B/Novosibirsk/40/2017-MA strain) can be used, to assess the drug effectiveness against influenza, as well as an additional tool for predicting the effectiveness of the vaccine against drifting strains.Цель: разработка нового, обладающего антигенной актуальностью, штамма вируса гриппа типа В, пригодного для моделирования гриппозной инфекции у экспериментальных мышей для оценки лечебной и профилактической эффективности противовирусных препаратов in vivo и in vitro.Mатериалы и методы: была проведена адаптация вируса гриппа В на мышах линии BALB/c. Выполнена сравнительная оценка патогенности родительского и адаптированного вариантов вируса гриппа В в экспериментах in vivo и in vitro. Используя адаптированный вариант вируса гриппа В, проведена оценка ингибирования нейраминидазы с помощью противовирусных лекарственных средств (осельтамивира этоксисукцинат, и Тамифлю®).Результаты: полученный адаптированный вариант, вируса гриппа В штамм. В/Novosibirsk/40/2017-MA моделирует у экспериментальных животных нелетальную гриппозную инфекцию с выраженными клиническими признаками заболевания. Описаны, деструктивные изменения в лёгких и головном, мозге, нарастающие в ходе инфекции. Вирусологический анализ внутренних органов (лёгкие, головной мозг, печень, сердце, почки, селезёнка) выявил репликацию вируса гриппа только в лёгких. На данной модели гриппозной инфекции проведена оценка эффективности противовирусных лекарственных средств (осель-тамивира этоксисукцинат, и Тамифлю®) in vivo и in vitro. Доказана высокая эффективность инновационного лекарственного средства осельтамивира этоксисукцинат..Заключение: полученный антигенно актуальный вирус гриппа В штамм В/Novosibirsk/40/2017-MA может, быть использован, для оценки эффективности противогриппозных препаратов, а также в качестве дополнительного инструмента прогнозирования эффективности вакцины, против дрейфующих штаммов

Considering Soil Potassium Pools with Dissimilar Plant Availability

Soil potassium (K) has traditionally been portrayed as residing in four functional pools: solution K, exchangeable K, interlayer (sometimes referred to as “fixed” or “nonexchangeable”) K, and structural K in primary minerals. However, this four-pool model and associated terminology have created confusion in understanding the dynamics of K supply to plants and the fate of K returned to the soil in fertilizers, residues, or waste products. This chapter presents an alternative framework to depict soil K pools. The framework distinguishes between micas and feldspars as K-bearing primary minerals, based on the presence of K in interlayer positions or three-dimensional framework structures, respectively; identifies a pool of K in neoformed secondary minerals that can include fertilizer reaction products; and replaces the “exchangeable” K pool with a pool defined as “surface-adsorbed” K, identifying where the K is located and the mechanism by which it is held rather than identification based on particular soil testing procedures. In this chapter, we discuss these K pools and their behavior in relation to plant K acquisition and soil K dynamics