25 results on '"Ogneva O"'
Search Results
2. n-Fatty acid composition per sediment mass in a rapidly eroding permafrost cliff
- Author
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Haugk, C., Jongejans, L., Mangelsdorf, K., Fuchs, M., Ogneva, O., Palmtag, J., Mollenhauer, G., Mann, P., Overduin, P., Grosse, G., Sanders, T., Tuerena, R., Schirrmeister, L., Wetterich, S., Kizyakov, A., and Strauss, J.
- Abstract
Organic carbon (OC) stored in Arctic permafrost represents one of Earth’s largest and most vulnerable terrestrial carbon pools. Amplified climate warming across the Arctic results in widespread permafrost thaw. Permafrost deposits exposed at river cliffs and coasts are particularly susceptible to thawing processes. Accelerating erosion of terrestrial permafrost along shorelines leads to increased transfer of organic matter (OM) to nearshore waters. However, the amount of terrestrial permafrost carbon and nitrogen as well as the OM quality in these deposits are still poorly quantified. Here, we characterise the sources and the quality of OM supplied to the Lena River at a rapidly eroding permafrost river shoreline cliff in the eastern part of the delta (Sobo-Sise Island). Our multi-proxy approach captures bulk elemental, molecular geochemical and carbon isotopic analyses of late Pleistocene Yedoma permafrost and Holocene cover deposits, discontinuously spanning the last ~52 ka. We show that the ancient permafrost exposed in the Sobo-Sise cliff has a high organic carbon content (mean of about 5 wt%).We found that the OM quality, which we define as the intrinsic potential to further transformation, decomposition, and mineralization, is also high as inferred by the lipid biomarker inventory. The oldest sediments stem from Marine Isotope Stage (MIS) 3 interstadial deposits (dated to 52 to 28 cal kyr BP) and is overlaid by Last Glacial MIS 2 (dated to 28 to 15 cal ka BP) and Holocene MIS 1 (dated to 7–0 cal ka BP) deposits. The relatively high average chain length (ACL) index of n-alkanes along the cliff profile indicates a predominant contribution of vascular plants to the OM composition. The elevated ratio of iso and anteiso-branched FAs relative to long chain (C ≥ 20) n-FAs in the interstadial MIS 3 and the interglacial MIS 1 deposits, suggests stronger microbial activity and consequently higher input of bacterial biomass during these climatically warmer periods. The overall high carbon preference index (CPI) and higher plant fatty acid (HPFA) values as well as high C / N ratios point to a good quality of the preserved OM and thus to a high potential of the OM for decomposition upon thaw. A decrease of HPFA values downwards along the profile probably indicates a relatively stronger OM decomposition in the oldest (MIS 3) deposits of the cliff.
- Published
- 2022
3. n-Fatty acid composition per total organic carbon in a rapidly eroding permafrost cliff
- Author
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Haugk, C., Jongejans, L., Mangelsdorf, K., Fuchs, M., Ogneva, O., Palmtag, J., Mollenhauer, G., Mann, P., Overduin, P., Grosse, G., Sanders, T., Tuerena, R., Schirrmeister, L., Wetterich, S., Kizyakov, A., and Strauss, J.
- Abstract
Organic carbon (OC) stored in Arctic permafrost represents one of Earth’s largest and most vulnerable terrestrial carbon pools. Amplified climate warming across the Arctic results in widespread permafrost thaw. Permafrost deposits exposed at river cliffs and coasts are particularly susceptible to thawing processes. Accelerating erosion of terrestrial permafrost along shorelines leads to increased transfer of organic matter (OM) to nearshore waters. However, the amount of terrestrial permafrost carbon and nitrogen as well as the OM quality in these deposits are still poorly quantified. Here, we characterise the sources and the quality of OM supplied to the Lena River at a rapidly eroding permafrost river shoreline cliff in the eastern part of the delta (Sobo-Sise Island). Our multi-proxy approach captures bulk elemental, molecular geochemical and carbon isotopic analyses of late Pleistocene Yedoma permafrost and Holocene cover deposits, discontinuously spanning the last ~52 ka. We show that the ancient permafrost exposed in the Sobo-Sise cliff has a high organic carbon content (mean of about 5 wt%).We found that the OM quality, which we define as the intrinsic potential to further transformation, decomposition, and mineralization, is also high as inferred by the lipid biomarker inventory. The oldest sediments stem from Marine Isotope Stage (MIS) 3 interstadial deposits (dated to 52 to 28 cal kyr BP) and is overlaid by Last Glacial MIS 2 (dated to 28 to 15 cal ka BP) and Holocene MIS 1 (dated to 7–0 cal ka BP) deposits. The relatively high average chain length (ACL) index of n-alkanes along the cliff profile indicates a predominant contribution of vascular plants to the OM composition. The elevated ratio of iso and anteiso-branched FAs relative to long chain (C ≥ 20) n-FAs in the interstadial MIS 3 and the interglacial MIS 1 deposits, suggests stronger microbial activity and consequently higher input of bacterial biomass during these climatically warmer periods. The overall high carbon preference index (CPI) and higher plant fatty acid (HPFA) values as well as high C / N ratios point to a good quality of the preserved OM and thus to a high potential of the OM for decomposition upon thaw. A decrease of HPFA values downwards along the profile probably indicates a relatively stronger OM decomposition in the oldest (MIS 3) deposits of the cliff.
- Published
- 2022
4. Development of enriced butter
- Author
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Bezverkhaya, N. S., primary and Ogneva, O. A., additional
- Published
- 2021
- Full Text
- View/download PDF
5. Organic matter characteristics using lipid biomarker analysis of a rapidly eroding permafrost cliff
- Author
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Haugk, C., Jongejans, L., Mangelsdorf, K., Fuchs, M., Ogneva, O., Palmtag, J., Mollenhauer, G., Mann, P., Overduin, P., Grosse, G., Sanders, T., Tuerena, R., Schirrmeister, L., Wetterich, S., Kizyakov, A., and Strauss, J.
- Abstract
Organic carbon (OC) stored in Arctic permafrost represents one of Earth's largest and most vulnerable terrestrial carbon pools. Amplified climate warming across the Arctic results in widespread permafrost thaw. Permafrost deposits exposed at river cliffs and coasts are particularly susceptible to thawing processes. Accelerating erosion of terrestrial permafrost along shorelines leads to increased transfer of organic matter (OM) to nearshore waters. However, the amount of terrestrial permafrost carbon and nitrogen as well as the OM quality in these deposits are still poorly quantified. Here, we characterise the sources and the quality of OM supplied to the Lena River at a rapidly eroding permafrost river shoreline cliff in the eastern part of the delta (Sobo-Sise Island). Our multi-proxy approach captures bulk elemental, molecular geochemical and carbon isotopic analyses of late Pleistocene Yedoma permafrost and Holocene cover deposits, discontinuously spanning the last ~52 ka. We show that the ancient permafrost exposed in the Sobo-Sise cliff has a high organic carbon content (mean of about 5 wt%).We found that the OM quality, which we define as the intrinsic potential to further transformation, decomposition, and mineralization, is also high as inferred by the lipid biomarker inventory. The oldest sediments stem from Marine Isotope Stage (MIS) 3 interstadial deposits (dated to 52 to 28 cal kyr BP) and is overlaid by Last Glacial MIS 2 (dated to 28 to 15 cal ka BP) and Holocene MIS 1 (dated to 7–0 cal ka BP) deposits. The relatively high average chain length (ACL) index of n-alkanes along the cliff profile indicates a predominant contribution of vascular plants to the OM composition. The elevated ratio of iso and anteiso-branched FAs relative to long chain (C ≥ 20) n-FAs in the interstadial MIS 3 and the interglacial MIS 1 deposits, suggests stronger microbial activity and consequently higher input of bacterial biomass during these climatically warmer periods. The overall high carbon preference index (CPI) and higher plant fatty acid (HPFA) values as well as high C / N ratios point to a good quality of the preserved OM and thus to a high potential of the OM for decomposition upon thaw. A decrease of HPFA values downwards along the profile probably indicates a relatively stronger OM decomposition in the oldest (MIS 3) deposits of the cliff.
- Published
- 2021
6. Нова проблема: цукровий діабет та COVID-19
- Author
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Zhuravlyova, L. V. and Ogneva, O. V.
- Abstract
The risk of COVID-19 infection in patients with diabetes is increased. This risk can be reduced, though not completely eliminated, by good glycemic control. It is important to study the effects of infection in cases of infection in patients with diabetes mellitus and measures that may reduce the risk of infection and the development of complications of coronary viral infection in diabetics.Objective: to analyze data on the possible association of diabetes mellitus with the risk of COVID-19 infection and the more severe course of this viral disease and to identify measures to prevent infection and complications in this category of patients. Results. The article discusses current research on the association of diabetes with an increased risk of infection and death from COVID-19. Some pathogenetic features of the virus related to the mechanism of action of individual drugs have been analyzed. Measures to prevent COVID-19 infection for patients with type 1 and type 2 diabetes mellitus are presented, as well as recommendations for adjusting hypoglycemic therapy for patients with both types of diabetes mellitus.Conclusions. Our knowledge of the prevalence of COVID-19 and the course of the disease in people with diabetes will develop as more detailed analysis. It is now well established that people with diabetes have an increased risk of developing coronavirus infection. This category of patients during the epidemic requires enhanced control of diabetes compensation and compliance with certain measures to reduce the risk of infection, as well as, in case of infection - adjustment of hypoglycemic therapy., Ризик інфікування COVID-19 у хворих із цукровим діабетом підвищений. Цей ризик можна знизити, хоча й не повністю усунути, за рахунок доброго глікемічного контролю. Важливими є вивчення впливу інфекції у випадках інфікування пацієнтів із цукровим діабетом та розробка заходів, що можуть знизити ризик інфікування й розвитку ускладнень коронавірусної інфекції у діабетиків.Мета – проаналізувати дані щодо можливого зв’язку цукрового діабету із ризиком інфікування COVID19 та більш тяжким перебігом цього вірусного захворювання і виявити заходи запобігання інфікуванню й виникненню ускладнень у даної категорії хворих.Результати. У статті розглянуто сучасні результати досліджень щодо зв’язку цукрового діабету із підвищеним ризиком інфікування та летальних випадків від COVID-19. Проаналізовано деякі патогенетичні особливості вірусу, що пов’язані з механізмом дії окремих препаратів. Представлено заходи щодо запобігання інфікуванню COVID-19 для пацієнтів із цукровим діабетом 1-го та 2-го типів, а також рекомендації з корегування гіпоглікемічної терапії для хворих на цукровий діабет обох типів.Висновки. Наші знання про поширеність COVID-19 та перебіг хвороби у людей, хворих на цукровий діабет, розвиватимуться по мірі більш детального аналізу. Наразі обґрунтовано припущення, що люди з цукровим діабетом мають підвищений ризик розвитку коронавірусної інфекції. Хворі цієї категорії під час епідемії потребують посиленого контролю компенсації діабету та дотримання певних заходів для зниження ризику інфікування, а також, при інфікуванні – коригування гіпоглікемічної терапії.
- Published
- 2020
7. Vegetarian diet and type 2 diabetes: is there a link?
- Author
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Zhuravlyova, L. V. and Ogneva, O. V.
- Abstract
Recently in the West there has been a surge in interest in vegetarianism - partial (lacto-vegetarian) or full (veganism). Vegetarianism can be considered a trend that is gaining popularity among Ukrainians. Medical attitudes towards vegetarianism have now changed as new studies have begun to emerge indicating a high risk of morbidity due to an overload of the body with animal protein, calories and saturated fat.Diet is one such lifestyle factor that can play a key role in the prevention of diabetes. Evidence suggests that a diet rich in whole grains, vegetables, fruits, dairy products, legumes and nuts may help reduce the risk of this condition. Therefore, it can be expected that vegetarians who do not consume meat and meat products and, less so in Western countries, often consume more nuts and legumes than non-vegetarians have a lower risk of developing type 2 diabetes mellitus.Purpose – to investigate the relationship between adherence to a vegetarian diet and the risk of developing type 2 diabetes mellitus, as well as to study the data on the effect of a vegetarian diet on the rates of compensation for type 2 diabetes patients.Results. The current literature data regarding the relationship between type 2 diabetes mellitus and adherence to a vegetarian diet based on the results of existing researches were studied. A number of clinical trials have been documented using a vegan or similar vegan diet for the treatment of type 2 diabetes. As a result, the subjects’ blood glucose levels decreased, as well as the required dosage of oral glucose-lowering drugs. Several studies show that a vegetarian diet is a way to prevent the risk of developing type 2 diabetes mellitus.Conclusions. A whole food vegan diet is safe for people with type 2 diabetes and has the same benefits, if not more, than the standard recommended diet. People who follow a vegetarian diet have a lower risk of developing type 2 diabetes compared to non-vegetarians. Further research is needed to examinate the effects of a vegetarian diet on the course of type 2 diabetes mellitus, which may make it possible to change the approach to the generally accepted diet for this category of patients in the future., Останнім часом на Заході спостерігається сплеск інтересу до вегетаріанства – часткового (лактоововегетаріанство) або повного (веганство). Вегетаріанство можна вважати трендом, який набирає популярності й серед українців. Наразі ставлення медиків до вегетаріанства змінилося, оскільки почали з’являтися нові дослідження, що свідчать про високий ризик захворюваності через перевантаження організму тваринним білком, калоріями і насиченими жирами.Дієта – один із факторів способу життя, який може зіграти ключову роль у профілактиці цукрового діабету. Наявні на сьогодні дані свідчать про те, що дієта, багата на цільнозернові, овочі, фрукти, молочні продукти, бобові та горіхи, може допомогти знизити ризик вказаного захворювання. Отже, можна очікувати, що вегетаріанці, які не вживають м’яса і м’ясних продуктів, і часто споживають більше горіхів й бобових, ніж не вегетаріанці, мають нижчий ризик розвитку цукрового діабету 2-го типу.Мета – дослідити наявність взаємозв’язку між дотриманням вегетаріанської дієти та ризиком розвитку цукрового діабету 2-го типу, а також вивчити дані щодо впливу вегетаріанської дієти на показники компенсації цукрового діабету 2-го типу.Результати. Розлянуто сучасні літературні дані щодо зв’язку цукрового діабету 2-го типу та дотримання вегетаріанської дієти. Було зафіксовано ряд клінічних випробувань з використанням веганської або подібної до веганської дієти з метою лікування цукрового діабету 2-го типу. Як результат, у піддослідних був знижений рівень глюкози в крові, що дозволило зменшити дози пероральних цукрознижувальних препаратів. Декілька досліджень доводять, що вегетаріанська дієта є способом запобігання ризику розвитку цукрового діабету 2-го типу.Висновок. Веганська дієта на основі цільних продуктів є безпечною для людей, що страждають на цукровий діабет 2-го типу, і має такі ж переваги, якщо не більші, як і типова дієта. Люди, що дотримуються вегетаріанської дієти, мають менший ризик захворіти на цукровий діабет 2-го типу, порівняно з не вегетаріанцями. Необхідні подальші дослідження для вивчення впливу вегетаріанської дієти на перебіг цукрового діабету 2-го типу, що може дозволити змінити підхід до загальноприйнятої дієти для даної категорії хворих у майбутньому.
- Published
- 2020
8. Development of recipes for combined products with functional properties
- Author
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Ogneva, O. A., primary and Bezverkhaya, N. S., additional
- Published
- 2021
- Full Text
- View/download PDF
9. A new problem: diabetes mellitus and COVID-19
- Author
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Zhuravlyova, L. V. and Ogneva, O. V.
- Subjects
сахарный диабет ,COVID-19 ,повышенный риск инфицирования ,коррекция терапии ,diabetes mellitus ,increased risk of infection ,correction of therapy ,616.379-008.64:616.98:578.834COVID-19]-092-085 ,цукровий діабет ,підвищений ризик інфікування ,корекція терапії - Abstract
The risk of COVID-19 infection in patients with diabetes is increased. This risk can be reduced, though not completely eliminated, by good glycemic control. It is important to study the effects of infection in cases of infection in patients with diabetes mellitus and measures that may reduce the risk of infection and the development of complications of coronary viral infection in diabetics.Objective: to analyze data on the possible association of diabetes mellitus with the risk of COVID-19 infection and the more severe course of this viral disease and to identify measures to prevent infection and complications in this category of patients.Results. The article discusses current research on the association of diabetes with an increased risk of infection and death from COVID-19. Some pathogenetic features of the virus related to the mechanism of action of individual drugs have been analyzed. Measures to prevent COVID-19 infection for patients with type 1 and type 2 diabetes mellitus are presented, as well as recommendations for adjusting hypoglycemic therapy for patients with both types of diabetes mellitus.Conclusions. Our knowledge of the prevalence of COVID-19 and the course of the disease in people with diabetes will develop as more detailed analysis. It is now well established that people with diabetes have an increased risk of developing coronavirus infection. This category of patients during the epidemic requires enhanced control of diabetes compensation and compliance with certain measures to reduce the risk of infection, as well as, in case of infection - adjustment of hypoglycemic therapy, Риск заболеть COVID-19 у больных сахарным диабетом повышен. Этот риск невозможно полностью устранить, однако можно снизить за счет хорошего гликемического контроля. Важно изучение влияния инфекции в случаях инфицирования пациентов с сахарным диабетом и мер, которые могут снизить риск инфицирования и развития осложнений коронавирусной болезни у больных диабетом.Цель – проанализировать данные о возможной связи сахарного диабета с риском инфицирования SARS-CoV-2 и более тяжелым течением вирусного заболевания COVID-19 и выявить меры предотвращения инфицирования и возникновения осложнений у данной категории больных.Результаты. В статье рассмотрены современные результаты исследований связи сахарного диабета с повышенным риском инфицирования и летальных случаев от COVID-19. Проанализированы некоторые патогенетические особенности вируса, связанные с механизмом действия отдельных препаратов. Представлены мероприятия по предотвращению инфицирования SARS-CoV-2 для пациентов с сахарным диабетом 1-го и 2-го типов, а также рекомендации по корректировке гипогликемической терапии для больных сахарным диабетом обоих типов.Выводы. Наши знания о распространенности COVID-19 и течении болезни у людей, больных сахарным диабетом, будут развиваться по мере более детального анализа. Сейчас обоснованно предположение, что люди с сахарным диабетом имеют повышенный риск развития коронавирусной инфекции. Эта категория больных во время эпидемии требует усиленного контроля компенсации диабета и соблюдения определенных мер по снижению риска инфицирования, а также, при инфицировании, – корректировки гипогликемической терапии., Ризик захворіти на COVID-19 у хворих із цукровим діабетом підвищений. Цей ризик неможливо повністю усунути, проте можна знизити за рахунок хорошого глікемічного контролю. Важливе вивчення впливу інфекції у випадках інфікування пацієнтів із цукровим діабетом та заходів, що можуть знизити ризик інфікування і розвитку ускладнень коронавірусної хвороби у хворих на діабет.Мета – проаналізувати дані щодо можливого зв’язку цукрового діабету із ризиком інфікування SARSCoV-2 та більш тяжким перебігом вірусного захворювання COVID-19 і виявити заходи запобігання інфікуванню та виникненню ускладнень у вказаної категорії хворих.Результати. У статті розглянуто сучасні результати досліджень щодо зв’язку цукрового діабету із підвищеним ризиком інфікування та летальних випадків від COVID-19. Проаналізовано деякі патогенетичні особливості вірусу, що пов’язані з механізмом дії окремих препаратів. Представлені заходи щодо запобігання інфікуванню SARS-CoV-2 для пацієнтів із цукровим діабетом 1-го та 2-го типів, а також рекомендації з корегування гіпоглікемічної терапії для хворих на цукровий діабет обох типів.Висновки. Наші знання про поширеність COVID-19 та перебіг хвороби у людей, хворих на цукровий діабет, розвиватимуться по мірі більш детального аналізу. Наразі обґрунтовано припущення, що люди з цукровим діабетом мають підвищений ризик розвитку коронавірусної інфекції. Ця категорія хворих під час епідемії потребує посиленого контролю компенсації діабету та дотримання певних заходів для зниження ризику інфікування, а також, при інфікуванні, – коригування гіпоглікемічної терапії.
- Published
- 2020
10. Immunotropic effects of Curcuma longa extract as a component of original rectal suppositories in the dynamics of experimental Сrohn’s disease
- Author
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Osikov, М. V., primary, Simonyan, Е. V., additional, Bakeeva, A. E., additional, and Ogneva, O. I., additional
- Published
- 2020
- Full Text
- View/download PDF
11. Scope of application of the ursodeoxycholic acid at gastroenterological pathology
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Zhuravlyova, L. V., primary and Ogneva, O. V., additional
- Published
- 2019
- Full Text
- View/download PDF
12. MECHANISMS OF MELATONIN EFFECTS UPON IMMUNE STATE IN EXPERIMENTAL DESYNCHRONOSES PRODUCED UNDER THE LED ILLUMINATION CONDITIONS
- Author
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Osikov, M. V., primary, Gizinger, O. A., additional, and Ogneva, O. I., additional
- Published
- 2016
- Full Text
- View/download PDF
13. Homological dimensions of certain algebras of principal (test) functions
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Ogneva, O. S. and Khelemskii, A. Ya.
- Published
- 1984
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- View/download PDF
14. Distribution of a chromium impurity in the surface layers of artificial emerald single crystals
- Author
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Vasilenko, M. V., Bukin, G. V., Gavrilov, F. F., Kruzhalov, A. V., Mizgulin, V. N., Neshov, F. G., and Ogneva, O. K.
- Published
- 1979
- Full Text
- View/download PDF
15. Comparative analysis of light effect generated by various light sources on the capacity of neutrophils
- Author
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Gizinger, O. A., Osicov, M. V., Telesheva, L. F., and Ogneva, O. I.
- Subjects
ГРНТИ 76.29 ,neutrophils ,УДК 616-097 ,УДК 616.155.34-097 ,phagocytosis ,light-emitting diode lamps ,нейтрофилы ,светодиодные источники света ,фагоцитоз - Abstract
С использованием цельной крови 60 клинически здоровых людей-добровольцев исследовано влияние света, генерируемого лампами накаливания, люминесцентными лампами и светодиодными носителями в пределах световой температуры 4000–4500 К, с интенсивностью излучения 0,03 Вт/м2 в диапазоне длин волн 320–400 нм, на функциональную активность нейтрофилов по показателям лизосомальной, фагоцитарной, НСТ-редуцирующей активности после 10, 20 и 30 мин воздействия при 37 °С. Установлено, что свет, генерируемый лампами накаливания и светодиодными лампами, не оказывает статистически значимого влияния на функциональную активность нейтрофилов. После воздействия света люминисцентных ламп зафиксировано увеличение количества клеток в спонтанном и индуцированном НСТ-тесте. Using the whole blood of 60 healthy volunteers the effect of light generated by incandescent lamps, luminescent lamps and light-emitting diode carriers on the capacity of neutrophils considering the indices of lysosomal, phagocytic and NBT-reducing activities after 10, 20 and 30 minutes of influence at the temperature of 37 °С has been studied. The light temperatures were 4000–5000 K, the radiation intensity was 0,03 W/m2, the wave length was 320–400 nm. It’s stated that the light generated by incandescent and light-emitting diodelamps doesn’t have a statistically significant effect on the capacity of neutrophils. The increase of cells number has been recorded in the spontaneous and induced NBT-test after the effect of luminescent lamps. Гизингер О.А., доктор биологических наук, профессор кафедры микробологии, вирусологии, иммунологии и клинической лабораторной диагностики, Южно-Уральский государственный медицинский университет (Челябинск), OGizinger@gmail.com. Осиков М.В., доктор медицинских наук, профессор кафедры патологической физиологии, Южно-Уральский государственный медицинский университет (Челябинск), prof.osikov@yandex.ru. Телешева Л.Ф., доктор медицинских наук, профессор кафедры микробиологии, вирусологии, иммунологии и клинической лабораторной диагностики, Южно-Уральский государственный медицинский университет (Челябинск), teleshevalarisa@mail.ru. Огнева О.И., аспирант научного образовательного центра «Проблемы фундаментальной медицины», Южно-Уральский государственный медицинский университет (Челябинск), ognevaolga2@mail.ru. O.A. Gizinger, South Ural State Medical University, Chelyabinsk, Russian Federation, OGizinger@gmail.com, M.V. Osicov, South Ural State Medical University, Chelyabinsk, Russian Federation, prof.osikov@yandex.ru, L.F. Telesheva, South Ural State Medical University, Chelyabinsk, Russian Federation, teleshevalarisa@mail.ru, O.I. Ogneva, South Ural State Medical University, Chelyabinsk, Russian Federation, ognevaolga2@mail.ru
- Published
- 2013
16. Coincidence of the homological dimensions of the Frechet algebra of smooth functions on a manifold with the dimension of the manifold
- Author
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Ogneva, O. S.
- Published
- 1986
- Full Text
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17. Ultraviolet small-sized multichannel photodetecting assembly based on a GaP photodiode
- Author
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Kravtchenko, Nicolas V., primary, Kulymanov, A. V., additional, Lobikov, Yu. V., additional, Ogneva, O. V., additional, Trishenkov, Mikhail A., additional, Khakuashev, Pavel E., additional, Chuprakov, A. M., additional, and Tsimlov, A. A., additional
- Published
- 1999
- Full Text
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18. Ultraviolet small-sized multichannel photodetecting assembly based on a GaP photodiode.
- Author
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Kravtchenko, Nicolas V., Kulymanov, A. V., Lobikov, Yu. V., Ogneva, O. V., Trishenkov, Mikhail A., Khakuashev, Pavel E., Chuprakov, A. M., and Tsimlov, A. A.
- Published
- 1999
- Full Text
- View/download PDF
19. Comparison of methods for calculating biological wastewater treatment
- Author
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Gogina Elena and Ogneva Olga
- Subjects
Environmental sciences ,GE1-350 - Abstract
Due to the increase in the discharge of nitrogen and phosphorus compounds into water bodies in many countries, the problem of eutrophication has become the most relevant in the field of biological treatment technologies. To solve this problem, many technological schemes for purification from biogenic elements have been developed, based on different methods. The concept of biological purification, the composition and process of nutrition of heterotrophic microorganisms, as well as the course of the process of methanogenesis are analyzed. The analysis of the methods of the two countries, Russia and Germany. Most of the facilities in Russia are designed in accordance with SNiP 2.04.03.85, while Germany offers a different biological treatment method developed by the German Water Association DWA A131.
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- 2021
- Full Text
- View/download PDF
20. Relationship of active layer thickness and landscape parameters of peatlands in the north of west siberia (nadym station)
- Author
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Bobrik, A. A., Olga Goncharova, Matyshak, G. V., Ryzhova, I. M., Moskalenko, N. G., Ponomareva, O. E., and Ogneva, O. A.
21. Soils of peat spots of frozen peatlands in the north of west siberia
- Author
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Ogneva, O. A., Matyshak, G. V., Goncharova, O. Yu, Anna Bobrik, and Ponomareva, O. E.
22. Seasonal nitrogen fluxes of the Lena River Delta.
- Author
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Sanders T, Fiencke C, Fuchs M, Haugk C, Juhls B, Mollenhauer G, Ogneva O, Overduin P, Palmtag J, Povazhniy V, Strauss J, Tuerena R, Zell N, and Dähnke K
- Subjects
- Dissolved Organic Matter, Environmental Monitoring, Seasons, Nitrogen analysis, Rivers
- Abstract
The Arctic is nutrient limited, particularly by nitrogen, and is impacted by anthropogenic global warming which occurs approximately twice as fast compared to the global average. Arctic warming intensifies thawing of permafrost-affected soils releasing their large organic nitrogen reservoir. This organic nitrogen reaches hydrological systems, is remineralized to reactive inorganic nitrogen, and is transported to the Arctic Ocean via large rivers. We estimate the load of nitrogen supplied from terrestrial sources into the Arctic Ocean by sampling in the Lena River and its Delta. We took water samples along one of the major deltaic channels in winter and summer in 2019 and sampling station in the central delta over a one-year cycle. Additionally, we investigate the potential release of reactive nitrogen, including nitrous oxide from soils in the Delta. We found that the Lena transported nitrogen as dissolved organic nitrogen to the coastal Arctic Ocean and that eroded soils are sources of reactive inorganic nitrogen such as ammonium and nitrate. The Lena and the Deltaic region apparently are considerable sources of nitrogen to nearshore coastal zone. The potential higher availability of inorganic nitrogen might be a source to enhance nitrous oxide emissions from terrestrial and aquatic sources to the atmosphere., (© 2021. The Author(s).)
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- 2022
- Full Text
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23. Degrading permafrost river catchments and their impact on Arctic Ocean nearshore processes.
- Author
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Mann PJ, Strauss J, Palmtag J, Dowdy K, Ogneva O, Fuchs M, Bedington M, Torres R, Polimene L, Overduin P, Mollenhauer G, Grosse G, Rachold V, Sobczak WV, Spencer RGM, and Juhls B
- Subjects
- Arctic Regions, Ecosystem, Oceans and Seas, Rivers, Permafrost
- Abstract
Arctic warming is causing ancient perennially frozen ground (permafrost) to thaw, resulting in ground collapse, and reshaping of landscapes. This threatens Arctic peoples' infrastructure, cultural sites, and land-based natural resources. Terrestrial permafrost thaw and ongoing intensification of hydrological cycles also enhance the amount and alter the type of organic carbon (OC) delivered from land to Arctic nearshore environments. These changes may affect coastal processes, food web dynamics and marine resources on which many traditional ways of life rely. Here, we examine how future projected increases in runoff and permafrost thaw from two permafrost-dominated Siberian watersheds-the Kolyma and Lena, may alter carbon turnover rates and OC distributions through river networks. We demonstrate that the unique composition of terrestrial permafrost-derived OC can cause significant increases to aquatic carbon degradation rates (20 to 60% faster rates with 1% permafrost OC). We compile results on aquatic OC degradation and examine how strengthening Arctic hydrological cycles may increase the connectivity between terrestrial landscapes and receiving nearshore ecosystems, with potential ramifications for coastal carbon budgets and ecosystem structure. To address the future challenges Arctic coastal communities will face, we argue that it will become essential to consider how nearshore ecosystems will respond to changing coastal inputs and identify how these may affect the resiliency and availability of essential food resources., (© 2021. The Author(s).)
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- 2022
- Full Text
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24. Relationship between the change of ethological status and concentration of certain cytokines in blood in experimental desynchronosis under led lighting.
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Osikov MV and Ogneva OI
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- Animals, Chronobiology Disorders physiopathology, Guinea Pigs, Male, Chronobiology Disorders blood, Interferon-gamma blood, Interleukin-4 blood, Lighting
- Abstract
Changing the natural rhythm of day and night leads to the development of DS, disruption of coordinated muscular activity, adequate behavioral activity, a decrease of attention in the performance of night work by experts in various fields. Changes ethological status may potentiate or weaken the changes in the indices of immune status, contribute to the formation of allostatic load at desynchronosis., The Purpose: To investigate the relationship between changes ethological status and concentration of certain cytokines in peripheral blood in experimental desynchronosis under LED lighting., Methods: The study was performed on 158 adult guinea pigs, which were randomly assigned into 2 groups: 1 group- animals in the conditions of standard fixed (12 h light / 12 h dark) LED lighting (SFSDO); 2 group- animals with jet lag in terms of LED lighting (DESSDO). Light desynchronosis created by keeping animals at clock coverage for 30 days. Behavioral activity was studied in the test «open field» cognitive function was assessed using aqueous «labyrinth» Morris. By ELISA was determined on the apparatus in the peripheral blood concentration of interleukin - 4 (IL-4), interferon-gamma (IFN-g), melatonin, cortisol via specific for guinea pig test systems., Results: It was found that in animals of DS in terms of LED lighting in the dynamics of 10-30 days of observation show signs of anxiety, depression orienting-exploratory behavior, reduce the long-term memory and learning ability, spatial orientation disorders. It found that when a jet lag LED lighting conditions for 10 days, 20 days and 30 days in peripheral blood melatonin concentration decreases, the concentration of cortisol rises. In peripheral blood decreased IL-4 concentrations of 20 and 30 days, reducing the concentration of IFN-g at 30 days. Based on the results of correlation analysis, ethological change status and progress of cognitive function with a decrease in the blood concentration of IL-4 and IFN-g, the concentration of melatonin increase cortisol levels., Conclusion: The results indicate that in experimental conditions in desynchronosis LED lighting changes ethological status are associated with the progression of immune status changes.
- Published
- 2016
25. [Haemorheological impairments following aortic surgery and methods of correction thereof].
- Author
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Morozov IuA, Goncharova AV, Belov IuV, Charnaia MA, Solov'eva IN, Ragimov GA, and Ogneva OG
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- Aortic Aneurysm therapy, Blood Viscosity, Female, Fibrin Fibrinogen Degradation Products, Fibrinogen metabolism, Humans, Male, Middle Aged, Plasmapheresis methods, Aortic Aneurysm blood, Aortic Aneurysm surgery, Hemorheology methods
- Abstract
The article deals with the findings concerning alterations in rheological properties of the blood in patients who endured aortic surgery with and without artificial circulation. Also shown herein is the contribution of the plasmatic and erythrocytic components to the development of haemorheological disorders in the postoperative period. To this was added the assessment of the role plasmapheresis plays in correction of impaired blood rheological properties, depending upon the terms of its carrying out and the type of a surgical intervention performed.
- Published
- 2007
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