Content of Metals in Phragmites australis Trin. ex Steud and Potamogeton pectinatus L. from Water Bodies of Different Salinity

Металлы определяли в двух видах макрофитов – Phragmites australis Trin. ex Steud и Potamogeton pectinatus L., произрастающих в водоемах с разной соленостью, с помощью эмиссионного спектрометра с индуктивно-связанной плазмой. Анализ результатов методом главных компонент показал, что на валовое содержание металлов влияет вид макрофитов и условия окружающей среды, в частности химический состав воды. Оба вида макрофитов из пресноводного водохранилища Бугач отличались более высокими концентрациями железа, алюминия, никеля, ванадия и кобальта по сравнению с теми же видами макрофитов, собранными в солоноватоводных озерах. Однако для макрофитов из оз. Шира, отобранных в опресненной и солоноватоводной частях озера, расхождений в содержании данных металлов не выявлено. В ряде случаев пробы из одной точки, но собранные в разные годы имели существенные различия – это наблюдалось для растений тростника из солоноватоводной станции оз. Шира, и растений рдеста из оз. Шунет. Было установлено, что наиболее высокое валовое содержание большинства металлов характерно для P. pectinatusMetals were determined in two species of macrophytes Phragmites australis Trin. ex Steud and Potamogeton pectinatus L. grown in lakes of different salinity, using emission spectrometer with inductively coupled plasma. Principal component analysis revealed that the total metal content is influenced by species of macrophytes and environmental conditions (in particular water chemistry). Both species of macrophytes from freshwater reservoir Bugach were characterized by higher concentrations of Fe, Al, Ni, V and Co in comparison with the same species from brackish lakes. However, there were no significant differences in content of these metals between samples of macrophytes taken in desalinated and saltwater parts of Shira Lake. In some cases, metal content of samples collected in different years at the same place were significantly different. It was observed for plants of Ph. australis collected in brackish station of Shira Lake, and plants of P. pectinatus from Lake Shunet. It was found that the highest total content of most metals is typical for P. pectinatu

Summer Time Distribution of Sedentary and Migratory Individuals of the Baikal Grayling Thymallus baicalensis in the Tributaries of the Thermally Altered Section of the Yenisei River

Изменение температурного режима Енисея в нижнем бьефе ГЭС создало условия, позволяющие местной популяции байкальского хариуса осуществлять все стадии жизненного цикла в основном русле реки, без необходимости миграции в притоки, роль которых в поддержании популяционной структуры вида остается неизвестной. Целью проведенных в июле-августе 2021 года исследований стала оценка присутствия особей хариуса в пяти различных по протяженности притоках Енисея в районе г. Красноярска, а также их дифференциация по происхождению на основании анализа структуры чешуи и темпов роста. Полученные результаты свидетельствуют о неоднородном пространственном распределении вида в исследованных притоках, где он был представлен как оседлыми особями, так и мигрантами из основного русла Енисея. Область распространения хариуса в июле-августе была ограничена участками рек, температура воды в которых не превышала 16–17 ºС. Жилая медленнорастущая форма обнаружена в верхнем и среднем течении р. Березовка, а также на изолированных дамбами участках верхнего течения р. Кача. В крупных притоках Мана и Базаиха, на значительном удалении от их устья, отмечены мигранты из Енисея, с единичным присутствием оседлых особей. Таким образом, современная популяция байкальского хариуса на термически измененном участке реки Енисей включает рыб с разной миграционной активностью. Несмотря на меньшую биомассу зообентоса в притоках, по сравнению с основным руслом Енисея, преимуществом летней миграции в прогретые притоки может быть удлинение периода соматического роста рыб до 7 месяцевThe changes in the temperature regime of the Yenisei River downstream from the Krasnoyarsk Hydroelectric Power Plant have created conditions which allow the local population of the Baikal grayling to pass through all the stages of its life cycle in the main stream without migrating into the Yenisei tributaries, the role of the latter in maintaining the structure of the grayling population remaining unknown. The present research is aimed to determine the distribution of grayling in five Yenisei tributaries of different lengths in the vicinity of Krasnoyarsk and to investigate fish individuals’ origin based on comparative analysis of scale morphology and growth rate. The results indicate a heterogeneous spatial distribution of the species in the tributaries with both sedentary individuals and migrants from the mainstream of the Yenisei. Grayling distribution through July and August was limited to the river sections with water temperature up to 16–17 ºС. Slowly growing sedentary forms inhabit the upper and middle reaches of the Beryozovka River and the upper reaches of the Kacha River sections isolated by dams. Migrants from the Yenisei and single sedentary individuals were found at a considerable distance from the mouths of larger tributaries, the Mana and Bazaikha. Thus, the current population of the Baikal grayling in the thermally altered section of the Yenisei includes fish with different migration patterns. Although zoobenthos biomass is lower in the tributaries than in the mainstream of the Yenisei, a possible advantage of the summer migration into the warmed tributaries is the prolongation of the somatic growth period up to 7 month

Assessment of Anthropogenic Impact on the Yenisei River Anabranch within the City of Krasnoyarsk Based on Elemental Analysis of Macrophytes and Water

Абаканская протока р. Енисей в черте г. Красноярска подвержена влиянию антропогенных факторов (дамба в верховьях, подогретые воды ТЭЦ, рыбоводное хозяйство). Цель работы – оценить антропогенное влияние на лентический участок реки Енисей в г. Красноярске на основе элементного анализа макрофитов и воды. С помощью атомно-эмиссионной спектрометрии с индуктивно-связанной плазмой (ИСП-АЭС) определено содержание макро- и микроэлементов в воде и макрофитах Абаканской протоки. В воде обнаружено превышение ПДК для рыбохозяйственных водоемов по Cu, Mn, Mo, Al и фоновых значений по минерализации, концентрации B, Ba, Ca, Mg, Li, Na, Sr, Mn, что могло быть связано с поступлением ливневых сточных и грунтовых вод; концентрации Cu, вероятно, поступающей с подогретыми водами ТЭЦ; концентрации K и NO2 - в воде, вероятно, под воздействием рыбоводного хозяйства. Выявлено увеличение содержания Ba, Сa, Cu, Sr, Zn в элодее, Ca, Cu, Pb, Sr, Li в урути на участках, подверженных антропогенному воздействию. Содержание металлов в погруженных макрофитах свидетельствовало о загрязнении экосистемы Cu, Sr, Fe, Ni и Zn. Выявлены три группы макрофитов, различающиеся по содержанию элементов: элодея (Elodea canadensis Michx.) и рдест стеблеобъемлющий (Potamogeton perfoliatus L.); уруть (Myriophyllum sp.), рдест гребенчатый (Stuckenia pectinata (L.) Börner), роголистник погруженный (Ceratophyllum demersum L.); спирогира (Spirogyra sp.). Отличия могут быть связаны с морфологическими и физиологическими особенностями аккумуляции эссенциальных (Mg, Zn, Fe и V) и неэссенциальных (As, Li, Sr) элементов погруженными макрофитамиThe ‘Abakanskaya’ anabranch of the Yenisei River located in Krasnoyarsk is influenced by several anthropogenic factors (a dam in the upper reaches; heated water discharge from a thermal power plant; fish farming). The aim of the present work was to assess the anthropogenic impact on the lentic part of the Yenisei River in Krasnoyarsk based on elemental analysis of macrophytes and water. Inductively coupled plasma atomic emission spectrometry (ICP-AES) was used to determine the contents of macro- and trace elements in water and macrophytes. Results showed that Cu, Mn, Mo, and Al concentrations in water were higher than their MACs for fishery reservoirs, and specific conductivity and concentrations of B, Ba, Ca, Mg, Li, Na, Sr, and Mn in water exceeded their background values, which could be associated with the input of sewage and ground waters. The elevated concentration of Cu could be attributed to the input of that element with the heated waters of the thermal power plant, and increased concentrations of K and NO2- in water were probably caused by fish farming. Increased contents of Ba, Ca, Cu, Sr, and Zn in Elodea canadensis Michx. and Ca, Cu, Pb, Sr, and Li in Myriophyllum sp. were revealed at sites subjected to anthropogenic impact. The contents of metals in submerged macrophytes were indicative of the contamination of the ecosystem with Cu, Sr, Fe, Ni, and Zn. Three groups of macrophytes have been identified, differing in the contents of elements: E. canadensis, Potamogeton perfoliatus L.; Myriophyllum sp., Stuckenia pectinata (L.) Börner, Ceratophyllum demersum L.; and Spirogyra sp. These dissimilarities may be related to the morphological and physiological differences in the accumulation of essential (Mg, Zn, Fe, and V) and non-essential (As, Li, and Sr) elements by submerged macrophyte

Nanoscale Generation of White Light for Ultrabroadband Nanospectroscopy

Achieving efficient localization of white light at the nanoscale is a major challenge due to the diffraction limit, and nanoscale emitters generating light with a broadband spectrum require complicated engineering. Here we suggest a simple, yet highly efficient, nanoscale white-light source based on a hybrid Si/Au nanoparticle with ultrabroadband (1.3-3.4 eV) spectral characteristics. We incorporate this novel source into a scanning-probe microscope and observe broadband spectrum of photoluminescence that allows fast mapping of local optical response of advanced nanophotonic structures with submicron resolution, thus realizing ultrabroadband near-field nanospectroscopy.The work was partially supported by the Russian Science Foundation (Grant 17-19-01532 for nanoparticles fabrication), the Ministry of Education and Science of Russian Federation (Project 14.Y26.31.0010 for optical measurements), the Australian Research Council, and A*STAR SERC Pharos program, Grant 152 73 00025 (Singapore)

Prevalence, associated factors and outcomes of pressure injuries in adult intensive care unit patients: the DecubICUs study

Funder: European Society of Intensive Care Medicine; doi: http://dx.doi.org/10.13039/501100013347Funder: Flemish Society for Critical Care NursesAbstract: Purpose: Intensive care unit (ICU) patients are particularly susceptible to developing pressure injuries. Epidemiologic data is however unavailable. We aimed to provide an international picture of the extent of pressure injuries and factors associated with ICU-acquired pressure injuries in adult ICU patients. Methods: International 1-day point-prevalence study; follow-up for outcome assessment until hospital discharge (maximum 12 weeks). Factors associated with ICU-acquired pressure injury and hospital mortality were assessed by generalised linear mixed-effects regression analysis. Results: Data from 13,254 patients in 1117 ICUs (90 countries) revealed 6747 pressure injuries; 3997 (59.2%) were ICU-acquired. Overall prevalence was 26.6% (95% confidence interval [CI] 25.9–27.3). ICU-acquired prevalence was 16.2% (95% CI 15.6–16.8). Sacrum (37%) and heels (19.5%) were most affected. Factors independently associated with ICU-acquired pressure injuries were older age, male sex, being underweight, emergency surgery, higher Simplified Acute Physiology Score II, Braden score 3 days, comorbidities (chronic obstructive pulmonary disease, immunodeficiency), organ support (renal replacement, mechanical ventilation on ICU admission), and being in a low or lower-middle income-economy. Gradually increasing associations with mortality were identified for increasing severity of pressure injury: stage I (odds ratio [OR] 1.5; 95% CI 1.2–1.8), stage II (OR 1.6; 95% CI 1.4–1.9), and stage III or worse (OR 2.8; 95% CI 2.3–3.3). Conclusion: Pressure injuries are common in adult ICU patients. ICU-acquired pressure injuries are associated with mainly intrinsic factors and mortality. Optimal care standards, increased awareness, appropriate resource allocation, and further research into optimal prevention are pivotal to tackle this important patient safety threat

Correction to: Prevalence, associated factors and outcomes of pressure injuries in adult intensive care unit patients: the DecubICUs study

The original version of this article unfortunately contained a mistake

Prevalence, associated factors and outcomes of pressure injuries in adult intensive care unit patients: the DecubICUs study

Funder: European Society of Intensive Care Medicine; doi: http://dx.doi.org/10.13039/501100013347Funder: Flemish Society for Critical Care NursesAbstract: Purpose: Intensive care unit (ICU) patients are particularly susceptible to developing pressure injuries. Epidemiologic data is however unavailable. We aimed to provide an international picture of the extent of pressure injuries and factors associated with ICU-acquired pressure injuries in adult ICU patients. Methods: International 1-day point-prevalence study; follow-up for outcome assessment until hospital discharge (maximum 12 weeks). Factors associated with ICU-acquired pressure injury and hospital mortality were assessed by generalised linear mixed-effects regression analysis. Results: Data from 13,254 patients in 1117 ICUs (90 countries) revealed 6747 pressure injuries; 3997 (59.2%) were ICU-acquired. Overall prevalence was 26.6% (95% confidence interval [CI] 25.9–27.3). ICU-acquired prevalence was 16.2% (95% CI 15.6–16.8). Sacrum (37%) and heels (19.5%) were most affected. Factors independently associated with ICU-acquired pressure injuries were older age, male sex, being underweight, emergency surgery, higher Simplified Acute Physiology Score II, Braden score 3 days, comorbidities (chronic obstructive pulmonary disease, immunodeficiency), organ support (renal replacement, mechanical ventilation on ICU admission), and being in a low or lower-middle income-economy. Gradually increasing associations with mortality were identified for increasing severity of pressure injury: stage I (odds ratio [OR] 1.5; 95% CI 1.2–1.8), stage II (OR 1.6; 95% CI 1.4–1.9), and stage III or worse (OR 2.8; 95% CI 2.3–3.3). Conclusion: Pressure injuries are common in adult ICU patients. ICU-acquired pressure injuries are associated with mainly intrinsic factors and mortality. Optimal care standards, increased awareness, appropriate resource allocation, and further research into optimal prevention are pivotal to tackle this important patient safety threat

The First Finding of Amur Sleeper Perccottus Glenii Dybowski, 1877 (Perciformes: Odontobutidae) in the Middle Yenisey Basin

Представлены сведения о первой находке ротана Perccottus glenii Dybowski, 1877 в водоеме системы Среднего Енисея. Обнаружение разновозрастных рыб, включая сеголетков, свидетельствует об успешной натурализации вида. Предполагаемое время проникновения ротана в водоем – с 2005 по 2011 гг.The information about the first finding of Amur sleeper Perccottus glenii Dybowski, 1877 in a pond from the Middle Yenisei basin is given. Occurrence of fish of different ages, including juveniles, indicates a successful naturalization of the species in the studied pond. Estimated period of invasion of Amur sleeper is from 2005 to 201