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Morgavi DP, Cantalapiedra-Hijar G, Eugène M, Martin C, Noziere P, Popova M, Ortigues-Marty I, Muñoz-Tamayo R, Ungerfeld EM. Review: Reducing enteric methane emissions improves energy metabolism in livestock: is the tenet right? Animal 2023; 17 Suppl 3:100830. [PMID: 37263815 DOI: 10.1016/j.animal.2023.100830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 12/21/2022] [Accepted: 12/30/2022] [Indexed: 06/03/2023] Open
Abstract
The production of enteric methane in the gastrointestinal tract of livestock is considered as an energy loss in the equations for estimating energy metabolism in feeding systems. Therefore, the spared energy resulting from specific inhibition of methane emissions should be re-equilibrated with other factors of the equation. And, it is commonly assumed that net energy from feeds increases, thus benefitting production functions, particularly in ruminants due to the important production of methane in the rumen. Notwithstanding, we confirm in this work that inhibition of emissions in ruminants does not transpose into consistent improvements in production. Theoretical calculations of energy flows using experimental data show that the expected improvement in net energy for production is small and difficult to detect under the prevailing, moderate inhibition of methane production (≈25%) obtained using feed additives inhibiting methanogenesis. Importantly, the calculation of energy partitioning using canonical models might not be adequate when methanogenesis is inhibited. There is a lack of information on various parameters that play a role in energy partitioning and that may be affected under provoked abatement of methane. The formula used to calculate heat production based on respiratory exchanges should be validated when methanogenesis is inhibited. Also, a better understanding is needed of the effects of inhibition on fermentation products, fermentation heat, and microbial biomass. Inhibition induces the accumulation of H2, the main substrate used to produce methane, that has no energetic value for the host, and it is not extensively used by the majority of rumen microbes. Currently, the fate of this excess of H2 and its consequences on the microbiota and the host are not well known. All this additional information will provide a better account of energy transactions in ruminants when enteric methanogenesis is inhibited. Based on the available information, it is concluded that the claim that enteric methane inhibition will translate into more feed-efficient animals is not warranted.
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Affiliation(s)
- D P Morgavi
- Université Clermont Auvergne, INRAE, VetAgro Sup, UMR Herbivores, F-63122 Saint-Genes-Champanelle, France.
| | - G Cantalapiedra-Hijar
- Université Clermont Auvergne, INRAE, VetAgro Sup, UMR Herbivores, F-63122 Saint-Genes-Champanelle, France
| | - M Eugène
- Université Clermont Auvergne, INRAE, VetAgro Sup, UMR Herbivores, F-63122 Saint-Genes-Champanelle, France
| | - C Martin
- Université Clermont Auvergne, INRAE, VetAgro Sup, UMR Herbivores, F-63122 Saint-Genes-Champanelle, France
| | - P Noziere
- Université Clermont Auvergne, INRAE, VetAgro Sup, UMR Herbivores, F-63122 Saint-Genes-Champanelle, France
| | - M Popova
- Université Clermont Auvergne, INRAE, VetAgro Sup, UMR Herbivores, F-63122 Saint-Genes-Champanelle, France
| | - I Ortigues-Marty
- Université Clermont Auvergne, INRAE, VetAgro Sup, UMR Herbivores, F-63122 Saint-Genes-Champanelle, France
| | - R Muñoz-Tamayo
- Université Paris-Saclay, INRAE, AgroParisTech, UMR Modélisation Systémique Appliquée aux Ruminants, 91120 Palaiseau, France
| | - E M Ungerfeld
- Centro Regional de Investigación Carillanca, Instituto de Investigaciones Agropecuarias INIA, Temuco 4880000, Chile
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Popova M, Messé A, Gulberti A, Gerloff C, Pötter-Nerger M, Hilgetag C. P-117 A topology-based computational framework to assess the effect of deep brain stimulation in the context of freezing of gait in Parkinson’s disease. Clin Neurophysiol 2023. [DOI: 10.1016/j.clinph.2023.02.134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023]
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Romero P, Huang R, Jiménez E, Palma-Hidalgo JM, Ungerfeld EM, Popova M, Morgavi DP, Belanche A, Yáñez-Ruiz DR. Evaluating the effect of phenolic compounds as hydrogen acceptors when ruminal methanogenesis is inhibited in vitro – Part 2. Dairy goats. Animal 2023; 17:100789. [PMID: 37087998 DOI: 10.1016/j.animal.2023.100789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 03/17/2023] [Accepted: 03/20/2023] [Indexed: 03/31/2023] Open
Abstract
Most mitigation strategies to reduce enteric methane (CH4) production in the rumen induce an excess of rumen dihydrogen (H2) that is expelled and consequently not redirected to the synthesis of metabolites that can be utilised by the ruminant. We hypothesised that phenolic compounds can be potential H2 acceptors when added to the diet, as they can be degraded to compounds that may be beneficial for the animal, using part of the H2 available when ruminal methanogenesis is inhibited. We performed four in vitro incubation experiments using rumen inoculum from Murciano-Granadina adult goats: Experiment 1 examined the inhibitory potential of Asparagopsis taxiformis (AT) at different concentrations (0, 1, 2, 3, 4 and 5% of the substrate on a DM basis) in 24 h incubations; Experiment 2 investigated the effect of a wide range of phenolic compounds (phenol, catechol, resorcinol, hydroquinone, pyrogallol, phloroglucinol, gallic acid and formic acid) at different doses (0, 2, 4, and 6 mM) on rumen fermentation for 24 h; Experiment 3 evaluated the combined effect of each phenolic compound at 6 mM with AT at 2% DM in sequential batch cultures for 5 days; and Experiment 4 examined the dose-response effect of phloroglucinol at different concentrations (0, 6, 16, 26 and 36 mM) combined with AT in sequential batch cultures for 5 days. Results from Experiment 1 confirmed that AT at 2% DM substantially inhibited CH4 production while significantly increasing H2 accumulation and decreasing the acetate:propionate ratio. Results from Experiment 2 showed that phenolic compounds did not negatively affect rumen fermentation at any dose. In Experiment 3, each phenolic compound at 6 mM combined with AT at 2% DM inhibited CH4 production. Phloroglucinol numerically decreased H2 accumulation and significantly increased total gas production (TGP), volatile fatty acid (VFA) production and the acetate:propionate ratio. In Experiment 4, phloroglucinol at increasing doses supplemented with AT at 2% DM significantly decreased H2 accumulation and the abundances of archaea, protozoa and fungi abundances, and increased TGP, total VFA production and the acetate:propionate ratio in a dose-dependent way. In conclusion, combined treatment with AT and phloroglucinol was successful to mitigate CH4 production while preventing the accumulation of H2, leading to an increase in acetate and total VFA production and therefore an improvement in rumen fermentation in goats.
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Affiliation(s)
- P Romero
- Estación Experimental del Zaidín (CSIC), Profesor Albareda, 1, 18008 Granada, Spain
| | - R Huang
- Université Clermont Auvergne, INRAE, VetAgro Sup, UMR Herbivores, F-63122 Saint-Genès Champanelle, France
| | - E Jiménez
- Estación Experimental del Zaidín (CSIC), Profesor Albareda, 1, 18008 Granada, Spain
| | - J M Palma-Hidalgo
- Estación Experimental del Zaidín (CSIC), Profesor Albareda, 1, 18008 Granada, Spain
| | - E M Ungerfeld
- Centro Regional de Investigación Carillanca, Instituto de Investigaciones Agropecuarias INIA, Temuco 4880000, Chile
| | - M Popova
- Université Clermont Auvergne, INRAE, VetAgro Sup, UMR Herbivores, F-63122 Saint-Genès Champanelle, France
| | - D P Morgavi
- Université Clermont Auvergne, INRAE, VetAgro Sup, UMR Herbivores, F-63122 Saint-Genès Champanelle, France
| | - A Belanche
- Estación Experimental del Zaidín (CSIC), Profesor Albareda, 1, 18008 Granada, Spain; Departamento de Producción Animal y Ciencia de los Alimentos, Universidad de Zaragoza, Miguel Servet 177, 50013 Zaragoza, Spain
| | - D R Yáñez-Ruiz
- Estación Experimental del Zaidín (CSIC), Profesor Albareda, 1, 18008 Granada, Spain.
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Huang R, Romero P, Belanche A, Ungerfeld E, Yanez-Ruiz D, Morgavi D, Popova M. Evaluating the effect of phenolic compounds as hydrogen acceptors when ruminal methanogenesis is inhibited in vitro – Part 1. Dairy cows. Animal 2023; 17:100788. [PMID: 37087996 DOI: 10.1016/j.animal.2023.100788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 03/09/2023] [Accepted: 03/13/2023] [Indexed: 03/31/2023] Open
Abstract
Some antimethanogenic feed additives for ruminants promote rumen dihydrogen (H2) accumulation potentially affecting the optimal fermentation of diets. We hypothesised that combining an H2 acceptor with a methanogenesis inhibitor can decrease rumen H2 build-up and improve the production of metabolites that can be useful for the host ruminant. We performed three in vitro incubation experiments using rumen fluid from lactating Holstein cows: Experiment 1 examined the effect of phenolic compounds (phenol, catechol, resorcinol, hydroquinone, pyrogallol, phloroglucinol, and gallic acid) at 0, 2, 4, and 6 mM on ruminal fermentation for 24 h; Experiment 2 examined the combined effect of each phenolic compound from Experiment 1 at 6 mM with two different methanogenesis inhibitors (Asparagopsis taxiformis or 2-bromoethanesulfonate (BES)) for 24 h incubation; Experiment 3 examined the effect of a selected phenolic compound, phloroglucinol, with or without BES over a longer term using sequential incubations for seven days. Results from Experiment 1 showed that phenolic compounds, independently of the dose, did not negatively affect rumen fermentation, whereas results from Experiment 2 showed that phenolic compounds did not decrease H2 accumulation or modify CH4 production when methanogenesis was decreased by up to 75% by inhibitors. In Experiment 3, after three sequential incubations, phloroglucinol combined with BES decreased H2 accumulation by 72% and further inhibited CH4 production, compared to BES alone. Interestingly, supplementation with phloroglucinol (alone or in combination with the CH4 inhibitor) decreased CH4 production by 99% and the abundance of methanogenic archaea, with just a nominal increase in H2 accumulation. Supplementation of phloroglucinol also increased total volatile fatty acid (VFA), acetate, butyrate, and total gas production, and decreased ammonia concentration. This study indicates that some phenolic compounds, particularly phloroglucinol, which are naturally found in plants, could improve VFA production, decrease H2 accumulation and synergistically decrease CH4 production in the presence of antimethanogenic compounds.
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Sarancha G, Ammosov Y, Balashov A, Butrova N, Krokhalev O, Loginov A, Melnikov A, Popova M, Stepin A, Stolbov A, Svoboda V, Suntsov S, Timkovskiy G. Remote Plasma Physics Research and Teaching by Example of Turbulence Study at the University-Scale Tokamak GOLEM. Fusion Science and Technology 2023. [DOI: 10.1080/15361055.2022.2148842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Affiliation(s)
- G. Sarancha
- National Research Center “Kurchatov Institute,” Moscow, Russia
- Moscow Institute of Physics and Technology (National Research University), Dolgoprudny, Russia
| | - Ya. Ammosov
- National Research Center “Kurchatov Institute,” Moscow, Russia
- Moscow Institute of Physics and Technology (National Research University), Dolgoprudny, Russia
- RUDN University, Moscow, Russia
| | - A. Balashov
- National Research Center “Kurchatov Institute,” Moscow, Russia
| | - N. Butrova
- National Research Nuclear University MЕPhI, Moscow, Russia
| | - O. Krokhalev
- National Research Center “Kurchatov Institute,” Moscow, Russia
- Moscow Institute of Physics and Technology (National Research University), Dolgoprudny, Russia
| | - A. Loginov
- Moscow Institute of Physics and Technology (National Research University), Dolgoprudny, Russia
| | - A. Melnikov
- National Research Center “Kurchatov Institute,” Moscow, Russia
- Moscow Institute of Physics and Technology (National Research University), Dolgoprudny, Russia
- National Research Nuclear University MЕPhI, Moscow, Russia
| | | | - A. Stepin
- National Research Center “Kurchatov Institute,” Moscow, Russia
| | - A. Stolbov
- National Research Nuclear University MЕPhI, Moscow, Russia
| | - V. Svoboda
- Czech Technical University in Prague, Prague, Czech Republic
| | - S. Suntsov
- National Research Center “Kurchatov Institute,” Moscow, Russia
- National Research Nuclear University MЕPhI, Moscow, Russia
| | - G. Timkovskiy
- National Research Nuclear University MЕPhI, Moscow, Russia
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Fedorova L, Gusak A, Lepik K, Volkov N, Popova M, Moiseev I, Mikhailova N, Baykov V, Kulagin A. 832MO Immune microenvironment in classical Hodgkin lymphoma: Composition and dynamics in patients with relapsed/refractory disease. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Popova M, Tsygankov I, Rogacheva Y, Lepik K, Zalylov Y, Stelmah L, Baykov V, Bondarenko S, Mikhaylova N. 892MO High-dose chemotherapy with autologous hematopoietic stem cell transplantation in patients with HIV-related lymphoma. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.08.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Rogacheva Y, Popova M, Siniaev A, Volkova A, Markova I, Nikolaev I, Pinegina O, Ignatieva S, Bogomolova T, Gevorgayn A, Paina O, Bykova T, Vlasova Y, Goloshchapov O, Vladovskaya M, Bondarenko S, Klimko N, Zubarovskaya L. 907P Invasive aspergillosis caused by aspergillus non-fumigatus in children and adults after hematopoietic stem cell transplantation (HSCT) & chemotherapy. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.08.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Crvenkova S, Popova M. Acute Esophageal Damage in Patients with Inoperable Non-small Cell Lung Cancer Treated with Concurrent and Sequential Chemoradiotherapy. Open Access Maced J Med Sci 2020. [DOI: 10.3889/oamjms.2020.4281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
BACKGROUND: Acute esophageal damage may be a dose-limited factor for application the full planning radiotherapy (RT) dose in patients with inoperable non-small cell lung cancer (NSCLC). A combination of chemotherapy and RT may increase esophageal toxicity, but three-dimensional (3D) conformal RT offers better sparing of the organs at risk.
AIM: The purpose of this study was to show the incidence and degree of acute esophageal damage in lung cancer patients treated with sequential and concurrent chemoradiotherapy.
MATERIALS AND METHODS: The total number was 73 patients, of whom 26 (34.7%) had previously received sequential chemotherapy with a four-cycle followed by RT. In the second concurrent group, 47 (65.3%) patients were received concomitant chemotherapy and RT.
RESULTS: Of the 73 patients included in the study, 43 (57.3%) did not present any grade of esophagitis during the treatment. In the sequential group, 73.1% presented no esophagitis and in the concurrent group, 49%, respectively. Although there were differences between the two groups, none were statistically significant.
CONCLUSIONS: The reason for the good tolerability of the combination of chemotherapy and RT for inoperable NSCLC patients was using 3D conformal RT. Further improvements may be obtained with more sophisticated RT or radioprotective drugs.
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Rogacheva Y, Popova M, Lepik K, Kondakova E, Zalyalov Y, Stelmah L, Volkova A, Nikolaev I, Goloshchapov O, Barhatov I, Bondarenko S, Moiseev I, Baykov V, Mikhailova N, Klimko N, Afanasyev B. Influence of nivolumab on epidemiology of infectious complications in patients with relapse or refractory Hodgkin’s lymphoma. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz449.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Popova M, Rogacheva Y, Tsygankov I, Lepik K, Zalyalov Y, Stelmakh L, Moiseev I, Bondarenko S, Mikhaylova N, Baykov V, Afanasyev B. Immunotherapy in patients with relapsed/refractory HIV-related lymphomas. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz449.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Popova M, Rogacheva Y, Volkova A, Markova I, Nikolaev I, Ignatieva S, Bogomolova T, Kozlov A, Lepik K, Stelmakh L, Beynarovich A, Borzenkova E, Darskaya E, Kondakova E, Mikhailova N, Bondarenko S, Moiseev I, Zubarovskaya L, Klimko N, Afanasyev B. Invasive fungal diseases in patients with Hodgkin’s lymphoma before and after allogeneic hematopoietic stem cell transplantation. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz251.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Rogacheva Y, Popova M, Volkova A, Frolova A, Markova I, Nikolaev I, Ignatieva S, Bogomolova T, Gevorgian A, Paina O, Bykova T, Darskaya E, Goloshchapov O, Morozova E, Vladovskaya M, Bondarenko S, Moiseev I, Zubarovskaya L, Klimko N, Afanasyev B. Invasive fungal diseases caused by rare pathogens in patients after hematopoietic stem cell transplantation (HSCT) & chemotherapy. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz251.025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Rogacheva Y, Popova M, Lepik K, Kondakova E, Zalyalov Y, Stelmah L, Volkova A, Nikolaev I, Goloshchapov O, Barhatov I, Bondarenko S, Moiseev I, Baykov V, Mikhailova N, Klimko N, Afanasyev B. INFECTIOUS COMPLICATIONS OF NIVOLUMAB THERAPY IN RELAPSED/REFRACTORY HODGKIN'S LYMPHOMA. Hematol Oncol 2019. [DOI: 10.1002/hon.184_2631] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Y. Rogacheva
- Oncology; Raisa Gorbacheva Memorial Research Institute of Children Oncology, Hematology and Transplantation, First Pavlov State Medical University of St. Petersburg, Ministry of Health of Russia; Saint Petersburg Russian Federation
| | - M. Popova
- Oncology; Raisa Gorbacheva Memorial Research Institute of Children Oncology, Hematology and Transplantation, First Pavlov State Medical University of St. Petersburg, Ministry of Health of Russia; Saint Petersburg Russian Federation
| | - K. Lepik
- Oncology; Raisa Gorbacheva Memorial Research Institute of Children Oncology, Hematology and Transplantation, First Pavlov State Medical University of St. Petersburg, Ministry of Health of Russia; Saint Petersburg Russian Federation
| | - E. Kondakova
- Oncology; Raisa Gorbacheva Memorial Research Institute of Children Oncology, Hematology and Transplantation, First Pavlov State Medical University of St. Petersburg, Ministry of Health of Russia; Saint Petersburg Russian Federation
| | - Y. Zalyalov
- Oncology; Raisa Gorbacheva Memorial Research Institute of Children Oncology, Hematology and Transplantation, First Pavlov State Medical University of St. Petersburg, Ministry of Health of Russia; Saint Petersburg Russian Federation
| | - L. Stelmah
- Oncology; Raisa Gorbacheva Memorial Research Institute of Children Oncology, Hematology and Transplantation, First Pavlov State Medical University of St. Petersburg, Ministry of Health of Russia; Saint Petersburg Russian Federation
| | - A. Volkova
- Oncology; Raisa Gorbacheva Memorial Research Institute of Children Oncology, Hematology and Transplantation, First Pavlov State Medical University of St. Petersburg, Ministry of Health of Russia; Saint Petersburg Russian Federation
| | - I. Nikolaev
- Oncology; Raisa Gorbacheva Memorial Research Institute of Children Oncology, Hematology and Transplantation, First Pavlov State Medical University of St. Petersburg, Ministry of Health of Russia; Saint Petersburg Russian Federation
| | - O. Goloshchapov
- Oncology; Raisa Gorbacheva Memorial Research Institute of Children Oncology, Hematology and Transplantation, First Pavlov State Medical University of St. Petersburg, Ministry of Health of Russia; Saint Petersburg Russian Federation
| | - I. Barhatov
- Oncology; Raisa Gorbacheva Memorial Research Institute of Children Oncology, Hematology and Transplantation, First Pavlov State Medical University of St. Petersburg, Ministry of Health of Russia; Saint Petersburg Russian Federation
| | - S. Bondarenko
- Oncology; Raisa Gorbacheva Memorial Research Institute of Children Oncology, Hematology and Transplantation, First Pavlov State Medical University of St. Petersburg, Ministry of Health of Russia; Saint Petersburg Russian Federation
| | - I. Moiseev
- Oncology; Raisa Gorbacheva Memorial Research Institute of Children Oncology, Hematology and Transplantation, First Pavlov State Medical University of St. Petersburg, Ministry of Health of Russia; Saint Petersburg Russian Federation
| | - V. Baykov
- Oncology; Raisa Gorbacheva Memorial Research Institute of Children Oncology, Hematology and Transplantation, First Pavlov State Medical University of St. Petersburg, Ministry of Health of Russia; Saint Petersburg Russian Federation
| | - N. Mikhailova
- Oncology; Raisa Gorbacheva Memorial Research Institute of Children Oncology, Hematology and Transplantation, First Pavlov State Medical University of St. Petersburg, Ministry of Health of Russia; Saint Petersburg Russian Federation
| | - N. Klimko
- Mycology; I.I. Mechnikov North-Western State Medical University, Ministry of Health of Russia; Saint Petersburg Russian Federation
| | - B. Afanasyev
- Oncology; Raisa Gorbacheva Memorial Research Institute of Children Oncology, Hematology and Transplantation, First Pavlov State Medical University of St. Petersburg, Ministry of Health of Russia; Saint Petersburg Russian Federation
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Klimko N, Khostelidi S, Shadrivova O, Volkova A, Popova M, Uspenskaya O, Shneyder T, Bogomolova T, Ignatyeva S, Zubarovskaya L, Afanasyev B. Contrasts between mucormycosis and aspergillosis in oncohematological patients. Med Mycol 2019; 57:S138-S144. [DOI: 10.1093/mmy/myy116] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2018] [Revised: 09/06/2018] [Accepted: 10/17/2018] [Indexed: 12/30/2022] Open
Affiliation(s)
- N Klimko
- I.Mechnikov North-Western State Medical University, 1/28 Santiago de Cuba str., St. Petersburg, Russian Federation, 194291
| | - S Khostelidi
- I.Mechnikov North-Western State Medical University, 1/28 Santiago de Cuba str., St. Petersburg, Russian Federation, 194291
| | - O Shadrivova
- I.Mechnikov North-Western State Medical University, 1/28 Santiago de Cuba str., St. Petersburg, Russian Federation, 194291
| | - A Volkova
- I.P.Pavlov First Saint Petersburg State Medical University, 6–8 L’va Tolstogo str., Saint Petersburg, Russian Federation, 197022
| | - M Popova
- I.P.Pavlov First Saint Petersburg State Medical University, 6–8 L’va Tolstogo str., Saint Petersburg, Russian Federation, 197022
| | - O Uspenskaya
- Leningrad Regional Clinical Hospital, 45 Lunacharskogo prospect, St. Petersburg, Russian Federation, 197022
| | - T Shneyder
- Leningrad Regional Clinical Hospital, 45 Lunacharskogo prospect, St. Petersburg, Russian Federation, 197022
| | - T Bogomolova
- I.Mechnikov North-Western State Medical University, 1/28 Santiago de Cuba str., St. Petersburg, Russian Federation, 194291
| | - S Ignatyeva
- I.Mechnikov North-Western State Medical University, 1/28 Santiago de Cuba str., St. Petersburg, Russian Federation, 194291
| | - L Zubarovskaya
- I.P.Pavlov First Saint Petersburg State Medical University, 6–8 L’va Tolstogo str., Saint Petersburg, Russian Federation, 197022
| | - B Afanasyev
- I.P.Pavlov First Saint Petersburg State Medical University, 6–8 L’va Tolstogo str., Saint Petersburg, Russian Federation, 197022
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Rogacheva Y, Popova M, Nekrasova A, Tsygankov I, Lepik K, Stelmah L, Moiseev I, Bondarenko S, Mikhaylova N, Baykov V, Afanasyev B. Nivolumab treatment in patients with relapsed/refractory HIV-related lymphomas. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy486.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Popova M, Trendafilova I, Zgureva D, Kalvachev Y, Boycheva S, Novak Tušar N, Szegedi A. Polymer-coated mesoporous silica nanoparticles for controlled release of the prodrug sulfasalazine. J Drug Deliv Sci Technol 2018. [DOI: 10.1016/j.jddst.2018.01.020] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Antic D, Biljana M, Milic N, Cheson B, Narkhede M, Panovska I, Trajkova S, Popova M, Llamas P, Raso A, Delluc A, Ianotto J, Gerotziafas G, Fareed J. Internal and external validation of THROLY (thrombosis lymphoma) score. Thromb Res 2018. [DOI: 10.1016/j.thromres.2018.02.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Perlin DV, Aleksandrov IV, Zipunnikov VP, Popova M. [Laparoscopic radical cystectomy: innovations and classics]. Urologiia 2017:26-30. [PMID: 29135138 DOI: 10.18565/urology.2017.5.26-30] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
INTRODUCTION Radical cystectomy remains the gold-standard treatment for muscle-invasive bladder cancer. To combine the advantages of minimally invasive interventions and the well-established open surgery, we attempted to reproduce as accurately as possible the technique of open radical cystectomy using a laparoscopic procedure. MATERIALS AND METHODS The study comprised 35 patients (27 men and 8 women) with invasive bladder cancer who underwent laparoscopic radical cystectomy (LRC) between April 2013 and March 2016. The study included only patients with fully intra-corporal ileum conduits. RESULTS The operating time averaged 378 min., the mean blood loss was 285 ml, the mean postoperative hospital stay was 12.4 days. Only 20% of patients needed postoperative opioid analgesia. Postoperative complications occurred in 11.4% of patients. The vast majority of them were successfully managed by minimally invasive methods. CONCLUSION Laparoscopic radical cystectomy is a safe and effective treatment modality for invasive bladder cancer. However, more patients and a longer observation period are needed to recommend the method as a standard of care.
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Affiliation(s)
- D V Perlin
- Volgograd Regional Uronephrology Center, Volzhsky, Russia.,Volgograd SMU of Minzdrav of Russia, Volgograd, Russia
| | - I V Aleksandrov
- Volgograd Regional Uronephrology Center, Volzhsky, Russia.,Volgograd SMU of Minzdrav of Russia, Volgograd, Russia
| | - V P Zipunnikov
- Volgograd Regional Uronephrology Center, Volzhsky, Russia.,Volgograd SMU of Minzdrav of Russia, Volgograd, Russia
| | - M Popova
- Volgograd Regional Uronephrology Center, Volzhsky, Russia.,Volgograd SMU of Minzdrav of Russia, Volgograd, Russia
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Rira M, Morgavi DP, Archimède H, Marie-Magdeleine C, Popova M, Bousseboua H, Doreau M. Potential of tannin-rich plants for modulating ruminal microbes and ruminal fermentation in sheep. J Anim Sci 2015; 93:334-47. [PMID: 25568379 DOI: 10.2527/jas.2014-7961] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The objective of this work was to study nutritional strategies for decreasing methane production by ruminants fed tropical diets, combining in vitro and in vivo methods. The in vitro approach was used to evaluate the dose effect of condensed tannins (CT) contained in leaves of Gliricidia sepium, Leucaena leucocephala, and Manihot esculenta (39, 75, and 92 g CT/kg DM, respectively) on methane production and ruminal fermentation characteristics. Tannin-rich plants (TRP) were incubated for 24 h alone or mixed with a natural grassland hay based on Dichanthium spp. (control plant), so that proportions of TRP were 0, 0.25, 0.5, 0.75, and 1.0. Methane production, VFA concentration, and fermented OM decreased with increased proportions of TRP. Numerical differences on methane production and VFA concentration among TRP sources may be due to differences in their CT content, with greater effects for L. leucocephala and M. esculenta than for G. sepium. Independently of TRP, the response to increasing doses of CT was linear for methane production but quadratic for VFA concentration. As a result, at moderate tannin dose, methane decreased more than VFA. The in vivo trial was conducted to investigate the effect of TRP on different ruminal microbial populations. To this end, 8 rumen-cannulated sheep from 2 breeds (Texel and Blackbelly) were used in two 4 × 4 Latin square designs. Diets were fed ad libitum and were composed of the same feeds used for the in vitro trial: control plant alone or combined with pellets made from TRP leaves at 44% of the diet DM. Compared to TRP, concentration of Ruminococcus flavefaciens was greater for the control diet and concentration of Ruminococcus albus was least for the control diet. The methanogen population was greater for Texel than for Blackbelly. By contrast, TRP-containing diets did not affect protozoa or Fibrobacter succinogenes numbers. Hence, TRP showed potential for mitigating methane production by ruminants. These findings suggest that TRP fed as pellets could be used to decrease methane production.
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Affiliation(s)
- M Rira
- INRA, UMR 1213 Herbivores, 63122 Saint-Genès Champanelle, France
| | - D P Morgavi
- INRA, UMR 1213 Herbivores, 63122 Saint-Genès Champanelle, France
| | - H Archimède
- INRA, Unité de Recherches Zootechniques, 97170 Petit-Bourg, Guadeloupe, France
| | - C Marie-Magdeleine
- INRA, Unité de Recherches Zootechniques, 97170 Petit-Bourg, Guadeloupe, France
| | - M Popova
- INRA, UMR 1213 Herbivores, 63122 Saint-Genès Champanelle, France
| | - H Bousseboua
- Ecole Nationale Supérieure des Biotechnologies, Ali Mendjli, BP E66. 25100 Constantine, Algeria
| | - M Doreau
- INRA, UMR 1213 Herbivores, 63122 Saint-Genès Champanelle, France
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Yoncheva K, Popova M, Szegedi A, Mihaly J, Tzankov B, Lambov N, Konstantinov S, Tzankova V, Pessina F, Valoti M. Functionalized mesoporous silica nanoparticles for oral delivery of budesonide. J SOLID STATE CHEM 2014. [DOI: 10.1016/j.jssc.2013.12.020] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Affiliation(s)
- M. Popova
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - M. Reyes
- INRA, UR 406 Abeilles et Environnement, Site Agroparc, 84914 Avignon Cedex 9, France
| | - Y. Le Conte
- INRA, UR 406 Abeilles et Environnement, Site Agroparc, 84914 Avignon Cedex 9, France
| | - V. Bankova
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Sofia, Bulgaria
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Klimko N, Khostelidi S, Popova M, Volkova A, Kolbin A, Boychenko E, Klimovich A, Belogurova M, Podoltseva E, Medvedeva N, Zjuzgin I, Bogomolova T, Zubarovskaya L, Afanasyev B, Vasilyeva N. P254 Mucormycosis in hematological and oncological patients in Saint-Petersburg, Russia. Int J Antimicrob Agents 2013. [DOI: 10.1016/s0924-8579(13)70495-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Popova M, Molimard P, Courau S, Crociani J, Dufour C, Le Vacon F, Carton T. Beneficial effects of probiotics in upper respiratory tract infections and their mechanical actions to antagonize pathogens. J Appl Microbiol 2012; 113:1305-18. [PMID: 22788970 PMCID: PMC7166318 DOI: 10.1111/j.1365-2672.2012.05394.x] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2012] [Revised: 06/22/2012] [Accepted: 07/05/2012] [Indexed: 12/16/2022]
Abstract
Probiotics are live micro‐organisms with beneficial effects on human health, which have the ability to counteract infections at different locations of the body. Clinical trials have shown that probiotics can be used as preventive and therapeutic agents in upper respiratory tract infections (URTIs) and otitis. Their mechanical properties allow them to aggregate and to compete with pathogens for nutrients, space and attachment to host cells. Consequently, they can directly antagonize pathogens and thus exert beneficial effects without directly affecting the metabolism of the host. An overview of the probiotics with such traits, tested up to date in clinical trials for the prevention or treatment of URTIs and otitis, is presented in this review. Their mechanical properties in the respiratory tract as well as at other locations are also cited. Species with interesting in vitro properties towards pharyngeal cells or against common respiratory pathogens have also been included. The potential safety risks of the cited species are then discussed. This review could be of help in the screening of probiotic strains with specific mechanical properties susceptible to have positive effects in clinical trials against URTIs.
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Affiliation(s)
- M Popova
- Biofortis, Saint Herblain, France
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Popova M, Dimitrov M, Santo VD, Ravasio N, Scotti N. Dehydrogenation of cyclohexanol on copper containing catalysts: The role of the support and the preparation method. CATAL COMMUN 2012. [DOI: 10.1016/j.catcom.2011.10.021] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Popova M, Martin C, Eugène M, Mialon M, Doreau M, Morgavi D. Effect of fibre- and starch-rich finishing diets on methanogenic Archaea diversity and activity in the rumen of feedlot bulls. Anim Feed Sci Technol 2011. [DOI: 10.1016/j.anifeedsci.2011.04.060] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Szegedi A, Popova M, Goshev I, Mihály J. Effect of amine functionalization of spherical MCM-41 and SBA-15 on controlled drug release. J SOLID STATE CHEM 2011. [DOI: 10.1016/j.jssc.2011.03.005] [Citation(s) in RCA: 119] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Tsoncheva T, Manova E, Velinov N, Paneva D, Popova M, Kunev B, Tenchev K, Mitov I. Thermally synthesized nanosized copper ferrites as catalysts for environment protection. CATAL COMMUN 2010. [DOI: 10.1016/j.catcom.2010.08.007] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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Popova M, Martin C, Morgavi DP. Improved protocol for high-quality co-extraction of DNA and RNA from rumen digesta. Folia Microbiol (Praha) 2010; 55:368-72. [PMID: 20680573 DOI: 10.1007/s12223-010-0060-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2010] [Revised: 04/14/2010] [Indexed: 10/19/2022]
Abstract
We report an improved method for total nucleic acids extraction from rumen content samples. The method employs bead beating, and phenol-chloroform extraction followed by saline-alcohol precipitation. Total nucleic acids and RNA yield and purity were assessed by spectrophotometric measurements; RNA integrity was estimated using Agilent RNA 6000 Nano Kit on an Agilent 2100 Bioanalyzer. The method provided total nucleic acids and RNA extracts of good quantity and quality. The extraction is not time consuming and it is valuable for ecological studies of rumen microbial community structure and gene expression.
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Affiliation(s)
- M Popova
- INRA Clermont-Ferrand-Theix, 63122, Saint Gènes Champanelle, France
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Popova M, Szegedi A, Cherkezova-Zheleva Z, Mitov I, Kostova N, Tsoncheva T. Toluene oxidation on titanium- and iron-modified MCM-41 materials. J Hazard Mater 2009; 168:226-32. [PMID: 19269739 DOI: 10.1016/j.jhazmat.2009.02.018] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2008] [Revised: 01/26/2009] [Accepted: 02/03/2009] [Indexed: 05/23/2023]
Abstract
Iron- and titanium-modified MCM-41 materials, prepared by direct synthesis at ambient temperature or wet impregnation technique, were investigated using X-ray diffraction (XRD), transmission electron microscopy (TEM), temperature-programmed reduction (TPR), UV-vis diffuse reflectance, Mössbauer and FT-IR spectroscopies. Their catalytic behavior was studied in total oxidation of toluene. Materials with high surface area and well-ordered pore structure were obtained. The increase of the titanium content (up to 50%) in the bisubstituted, iron and titanium containing materials leads to partial structure collapse of the silica matrix. Finely dispersed anatase particles were also formed during the impregnation procedure. The catalytic activity of the bisubstituted materials was influenced by the method of their preparation, but higher catalytic stability could be achieved, compared to iron monosubstituted one. The nature of the catalytic active sites is discussed.
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Affiliation(s)
- M Popova
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Sofia, Bulgaria.
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Popova M. [Femicare - care about woman in menopause]. Akush Ginekol (Sofiia) 2007; 46 Suppl 2:50-53. [PMID: 18217306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
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Aleksandrova E, Bozhkova S, Georgieva E, Zlatareva M, Lishkova P, Mitkova M, Popova M, Spasova A, Stoichkova I, Stoianova S, Toshkova I, Khadzhieva S, Iancheva M, Rankova S. [The feeding of newborns with low birth weight with milk formula "Nenatal" and "Nutrilon-premium"]. Akush Ginekol (Sofiia) 2006; 45:38-43. [PMID: 16889187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
The aim of the study is to make retrospective analysis of 9 years experience in the feeding of praematuries and high risk newborn in that ward in First City Hospital-Sofia with formula milks "Nenatal" and "Nutrilon-premium". 721--42.4% from all babies in this period were feed with those formulas. With Nenatal only--11.8%, with Nutrilon-premium 88.2%. This the fact is due that all babies under 2000 gr. were fed with Nenatal, and after reaching 2000 gr.--with Nutrilon-premium. The results confirm that Nenatal is right formula for feeding of low and very low birth weight infant, due to its special content and qualities. The results from Nutrilon-premium illustrated that mean gain weight is the biggest in I grade of prematurity--33 grams, followed by matures--30 gr, after them II grade--29 gr., III grade--27 gr., IV grade--26 gr. As a conclusion we may say that mean gain weight for all groups is 29 grams. Consuming all gain weight of the babies feeding with Nutrilon-premium data appear that the biggest is in III of prematurity--1499 grams, followed by IV grade--1418 gr., I grade--1341 spama, II grade--1219 gr., and last matures--745 gr.
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Popova M, Shen YL, Khraishi T. Atomistic simulation of dislocation interactions in a model crystal subjected to shear. Molecular Simulation 2005. [DOI: 10.1080/08927020500349999] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Mavrodinova V, Popova M, Valchev V, Nickolov R, Minchev C. Beta zeolite colloidal nanocrystals supported on mesoporous MCM-41. J Colloid Interface Sci 2005; 286:268-73. [PMID: 15848427 DOI: 10.1016/j.jcis.2005.01.006] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2004] [Accepted: 01/05/2005] [Indexed: 11/17/2022]
Abstract
Zeolite-based composite materials prepared by the embedding of the beta zeolite nanophase from aqueous colloidal solution into matrices of preformed Si(Al)MCM-41 mesoporous molecular sieves have been characterized by different methods (XRD, SEM, FTIR, N2 adsorption, and TPD of NH3). Their potential as catalysts for toluene disproportionation has been compared to mechanical mixtures of freeze-dried nanobeta crystallites with Si(Al)MCM-41 mesoporous materials. It is found that the zeolite catalyst efficiency is not substantially changed by the presence of mesopores belonging to the matrix. It is suggested that formation of intergrown aggregates from the colloidal nanobeta particles provides own highly developed textural mesoporosity that makes the contribution of the diffusional alleviation of the support negligible.
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Affiliation(s)
- V Mavrodinova
- Institute of Organic Chemistry, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria.
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Popova M, Silici S, Kaftanoglu O, Bankova V. Antibacterial activity of Turkish propolis and its qualitative and quantitative chemical composition. Phytomedicine 2005; 12:221-228. [PMID: 15830845 DOI: 10.1016/j.phymed.2003.09.007] [Citation(s) in RCA: 148] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The antibacterial activity of propolis from different regions of Turkey was studied, accompanied by TLC and GC-MS analyses of its chemical composition and spectrophotometric quantification of the most important active principles. All six samples were active against the bacterial test strains used; however, samples 1 (Yozgat), 2 (Izmir) and 3 (Kayseri) were more active than samples 4 (Adana), 5 (Erzurum) and 6 (Artvin). By TLC comparison all samples were found to contain poplar taxonomic markers but in samples 4 (Adana), 5 (Erzurum) and 6 (Artvin), different substances were observed, which were not present in P. nigra L. bud exudate. The typical poplar samples 1 (Yozgat), 2 (Izmir) and 3 (Kayseri) displayed very similar phenolic and flavonoid content. Samples 4 (Adana), 5 (Erzurum) and 6 (Artvin) were characterized by low phenolic and very low flavonoid concentrations. Qualitative analysis by GC-MS revealed that sample 4 (Adana) contained diterpenic acids and high percent of cinnamyl cinnamate, sample 5 (Erzurum)-significant amounts of hydroxy fatty acids and triterpenic alcohoLs, and sample 6 (Artvin)-phenolic glycerides, characteristic for the bud exudate of Populus euphratica Oliv. The results confirm the importance of phenolics for propolis antibacterial activity, and the significance of P. nigra L. as a propolis source, which provides the hive with the best defense against microorganisms.
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Affiliation(s)
- M Popova
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Mavrodinova V, Popova M, Mihályi R, Pál-Borbély G, Minchev C. Toluene disproportionation and coking on zeolites Y modified with Lewis-connected InO+ acid sites. ACTA ACUST UNITED AC 2004. [DOI: 10.1016/j.molcata.2004.06.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Boyanova L, Mentis A, Gubina M, Rozynek E, Gosciniak G, Kalenic S, Göral V, Kupcinskas L, Kantarçeken B, Aydin A, Archimandritis A, Dzierzanowska D, Vcev A, Ivanova K, Marina M, Mitov I, Petrov P, Ozden A, Popova M. The status of antimicrobial resistance of Helicobacter pylori in eastern Europe. Clin Microbiol Infect 2002; 8:388-96. [PMID: 12199848 DOI: 10.1046/j.1469-0691.2002.00435.x] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
OBJECTIVE To evaluate the primary, secondary and combined resistance to five antimicrobial agents of 2340 Helicobacter pylori isolates from 19 centers in 10 countries in eastern Europe. METHODS Data were available for centers in Bulgaria, Croatia, the Czech Republic, Estonia, Greece, Lithuania, Poland, Russia, Slovenia and Turkey. Susceptibility was tested by agar dilution (seven countries), E test (five countries) and disk diffusion (three countries) methods. Resistance breakpoints (mg/L) were: metronidazole 8, clarithromycin 1, amoxicillin 0.5, tetracycline 4, and ciprofloxacin 1 or 4 in most centers. Primary and post-treatment resistance was assessed in 2003 and 337 isolates respectively. Results for 282 children and 201 adults were compared. RESULTS Primary resistance rates since 1998 were: metronidazole 37.9%, clarithromycin 9.5%, amoxicillin 0.9%, tetracycline 1.9%, ciprofloxacin 3.9%, and both metronidazole and clarithromycin 6.1%. Isolates from centers in Slovenia and Lithuania exhibited low resistance rates. Since 1998, amoxicillin resistance has been detected in the southeastern region. From 1996, metronidazole resistance increased significantly from 30.5% to 36.4%, while clarithromycin resistance increased slightly from 8.9% to 10.6%. In centers in Greece, Poland, and Bulgaria, the mean metronidazole resistance was slightly higher in adults than in children (39% versus 31.2%, P > 0.05); this trend was not found for clarithromycin or amoxicillin (P > 0.20). Post-treatment resistance rates exhibited wide variations. CONCLUSIONS In eastern Europe, primary H. pylori resistance to metronidazole is considerable, and that to clarithromycin is similar to or slightly higher than that in western Europe. Resistance to amoxicillin, ciprofloxacin and tetracycline was detected in several centers. Primary and post-treatment resistance rates vary greatly between centers.
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Affiliation(s)
- L Boyanova
- Department of Microbiology, Medical University of Sofia, Sofia, Bulgaria.
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Abstract
Two diterpene glycosides, ent-8(17)-labden-15-O-alpha-L-rhamnoside and ent-8(17)-labden-15-O-(3'-O-acetyl)-alpha-L-rhamnoside (new natural compounds) were isolated from propolis from El Salvador. The compounds showed significant antibacterial activity and moderate toxicity to Artemia salina nauplii. These are the first glycosides reported in bee glue.
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Affiliation(s)
- M Popova
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Sofia
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Abstract
2',3'-Dihydroxy-4,4'-dimethoxychalcone (1) and 2',3',4-trihydroxy-4'-methoxy-chalcone, two new chalcones, were isolated from propolis from El Salvador. The compounds showed significant antibacterial and antifungal activity and moderate toxicity to Artemia salina nauplii.
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Affiliation(s)
- M Popova
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Sofia
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Abstract
The use of systemic antibacterial drugs in Bulgaria for the period from 1979 to 1994 had been studied using the Defined Daily Doses (DDD) methodology. The total consumption of antibacterials, the consumption by therapeutic groups and preparations were presented. The usage of anti-infectives in Bulgaria was growing during the period under discussion. Most of the groups followed the general tendency of the total consumption showing their own variations throughout the years. The role of the different preparations was defined. Bulgarians' way of using antibacterials showed the following characteristics: permanent increase in the total consumption; high consumption of tetracyclines and extended spectrum penicillins; low consumption of narrow spectrum antibiotics; and relatively high consumption of aminoglycosides and chloramphenicol. In this study an attempt was made to relate the data with several factors influencing the consumption. For comparison we studied available statistical data of some other countries.
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Affiliation(s)
- M Popova
- National Drug Institute, Sofia, Bulgaria
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Kiivet RA, Bíba V, Enache D, Foltan V, Gulbinovic J, Oltványi N, Orazem A, Popova M, Stika L. Changes in the use of antibacterial drugs in the countries of central and eastern Europe. Eur J Clin Pharmacol 1995; 48:299-304. [PMID: 7589059 DOI: 10.1007/bf00198316] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Use of systemic antibacterial drugs in the countries of central and eastern Europe (CCEE) has been studied using the defined daily doses (DDD) methodology. For the comparison, national wholesale data from Bulgaria, the Czech Republic, Estonia, Hungary, Lithuania, Slovakia, Slovenia and Romania for the years 1989 and 1992 were used, i.e. for the years before and after the rapid sociopolitical changes in these countries. Substantial differences in the patterns of antibacterial drug use between countries as geographically and economically similar as the CCEE were observed. The general sales of antibiotics varied almost twofold among the CCEE and had decreased in most of the CCEE during the study period. The proportion of tetracyclines in the sales of 1992 ranged from 10% in Slovenia to 49% in Estonia, and that of broad-spectrum penicillins from 6% in Estonia to 40% in Slovenia. The use of narrow-spectrum penicillins varied within the range of 4% in Bulgaria to 38% in Slovakia, and had decreased during the study years in all countries. Aminoglycosides accounted for 5-12% of all antibacterials in Bulgaria, Estonia, Lithuania, Romania and Slovakia in the study period, and these countries, with the exception of Slovakia, also had a high consumption of chloramphenicol. In 1992, by far the most popular antiinfectives in the CCEE were doxycycline, ampicillin and co-trimoxazole, which ranked among the top ten drugs in all countries studied.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- R A Kiivet
- Department of Pharmacology, Tartu University, Estonia
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Ivanov K, Popova M, Denev P, Kratchanov C. Application of polyuronides for removing heavy metals from vegetable oils. III. Application of alginic acid, pectic and pectinic acids for demetalization of hydrogenated sunflower oil. Z Lebensm Unters Forsch 1992; 195:455-8. [PMID: 1462709 DOI: 10.1007/bf01191717] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Laboratory experiments have been carried out for the removal of heavy metals from hydrogenated vegetable oils using hydrated polyuronides (degree of swelling from 4 to 12.8 ml/g) such as alginic acid, pectic and pectinic acids. The effect of the type of polyuronide, degree of esterification and oil treatment on the degree of demetalization has been studied. It has been shown that with increase in the degree of esterification of the polyuronide the efficiency of demetalization decreases. The second and third treatment of the hydrogenated oil with pectinic acid resulted in a high degree of heavy metal removal. The possibility of efficient demetalization of hydrogenated oils by treatment with water solutions of pectinic acids has also been demonstrated. The degree of metal ion removal increases with decreasing concentration of pectinic acids in the water solution.
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Affiliation(s)
- K Ivanov
- Hochschule für Lebensmittelindustrie, Plovdiv, Bulgaria
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Kratchanov C, Popova M. Increasing the purity of polyuronic sorbents. J Chromatogr A 1990. [DOI: 10.1016/s0021-9673(01)93259-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Karaguozov A, Daskalov D, Popova M, Kurlov T. [Our experience with conization of the cervix uteri]. Akush Ginekol (Sofiia) 1983; 22:133-135. [PMID: 6638383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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Kratschanov C, Stamov S, Popova M, Pantcheva T. Anwendung von Pektinemulgatoren zur Herstellung von Lebensmittelemulsionen mit reduziertem Energiewert. ACTA ACUST UNITED AC 1982. [DOI: 10.1002/food.19820260302] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Stantschev S, Kratschanov C, Popova M, Kirtschev N, Martschev M. [Use of granulated pectin on those exposed to lead]. Z Gesamte Hyg 1979; 25:585-7. [PMID: 506332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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48
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Popova-Baltova E, Popova M. [Microcrystalloscopic reactions for identification of several piperazine derivatives of phenothiazine]. Farmatsiia 1977; 26:63-4. [PMID: 19303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Popova M, Uzunov I. [Use of complex compounds of In113m with certain amino acids for scanning]. Med Radiol (Mosk) 1975; 20:39-41. [PMID: 1226082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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