Martin Stefanov, Georgi D. Rashkov, Preslava Borisova, Emilia Apostolova,
Drought is one of the main environmental stress factors affecting plant growth and yield. The impact of different PEG concentrations on the photosynthetic performance of maize (Zea mays L. Mayflower) and sorghum (Sorghum bicolor L. Foehn) was investigated. The activity of the photosynthetic apparatus was assessed using chlorophyll fluorescence (PAM and JIP test) and photooxidation of P700. The data revealed that water deficiency decreased the photochemical quenching (qP), the ratio of photochemical ...
Tópico(s): Plant responses to elevated CO2
2023 - Multidisciplinary Digital Publishing Institute | Plants
Martin Stefanov, Georgi D. Rashkov, Ekaterina Yotsova, Preslava Borisova, Anelia G. Dobrikova, Emilia Apostolova,
In this study, the impacts of the foliar application of different sodium nitroprusside (SNP, as a donor of nitric oxide) concentrations (0-300 µM) on two sorghum varieties (Sorghum bicolor L. Albanus and Sorghum bicolor L. Shamal) under salt stress (150 mM NaCl) were investigated. The data revealed that salinity leads to an increase in oxidative stress markers and damage of the membrane integrity, accompanied by a decrease in the chlorophyll content, the open photosystem II (PSII) centers, and the performance ...
Tópico(s): Photosynthetic Processes and Mechanisms
2023 - Multidisciplinary Digital Publishing Institute | Plants
Anelia G. Dobrikova, Emilia Apostolova, Anetta Hańć, Ekaterina Yotsova, Preslava Borisova, Ilektra Sperdouli, Ioannis‐Dimosthenis S. Adamakis, Michael Moustakas,
The herbal plant Salvia sclarea L. (clary sage) is classified to cadmium (Cd) accumulators and considered as a potential plant for phytoremediation of heavy metal polluted soil. However, the effect of Cd only treatment on the function of the photosynthetic apparatus of S. sclarea, as well as the mechanisms involved in Cd tolerance have not yet been studied in detail. This study was conducted to examine the integrative responses of S. sclarea plants exposed to a high Cd supply (100 µM) for 3 and 8 days ...
Tópico(s): Heavy metals in environment
2021 - Elsevier BV | Ecotoxicology and Environmental Safety
Anelia G. Dobrikova, Emilia Apostolova, Anetta Hańć, Ekaterina Yotsova, Preslava Borisova, Ilektra Sperdouli, Ioannis‐Dimosthenis S. Adamakis, Michael Moustakas,
In recent years, due to the development of industrial and agricultural production, heavy metal contamination has attracted increasing attention. Aromatic and medicinal plant Salvia sclarea L. (clary sage) is classified to zinc (Zn) accumulators and considered as a potential plant for the phytoremediation of heavy metal polluted soils. In this study, an adaptation of clary sage to 900 µM (excess) Zn exposure for eight days in a hydroponic culture was investigated. The tolerance mechanisms under excess ...
Tópico(s): Heavy Metals in Plants
2021 - Multidisciplinary Digital Publishing Institute | Plants
Hisham A. Elshoky, Ekaterina Yotsova, Mohamed A. Farghali, Khaled Y. Farroh, Kh El-Sayed, Heba ElSayed ElZorkany, Georgi D. Rashkov, Anelia G. Dobrikova, Preslava Borisova, Martin Stefanov, Maha A. Ali, Emilia Apostolova,
This study investigates the impacts of zinc oxide nanoparticles: bare (ZnO NPs) and ZnO NPs coated with silicon shell (ZnO-Si NPs), on Pisum sativum L. under physiological and salt stress conditions. The experimental results revealed that the foliar spray with ZnO-Si NPs and 200 mg/L ZnO NPs did not influence the stomata structure, the membrane integrity, and the functions of both photosystems under physiological conditions, while 400 mg/L ZnO-Si NPs had beneficial effects on the effective quantum ...
Tópico(s): Plant Micronutrient Interactions and Effects
2021 - Elsevier BV | Plant Physiology and Biochemistry
Duncan Light, Preslava Ivanova,
Purpose This paper aims to investigate the visitor experience at a “lightest” dark tourism attraction, focusing on issues of thanatopsis and mortality mediation. Design/methodology/approach Data were collected through semi-structured interviews with 24 visitors to a “Dungeon”-style attraction in the UK (a site of “lightest” dark tourism). The interviews were analysed using thematic analysis; four themes were identified. Findings Reflection on, and contemplation of, issues of life and death was a common ( ...
Tópico(s): Memory, Trauma, and Commemoration
2021 - Emerald Publishing Limited | Tourism Review
Martin Stefanov, Georgi D. Rashkov, Ekaterina Yotsova, Preslava Borisova, Anelia G. Dobrikova, Emilia Apostolova,
The impacts of different NaCl concentrations (0–250 mM) on the photosynthesis of new hybrid lines of maize (Zea mays L. Kerala) and sorghum (Sorghum bicolor L. Shamal) were investigated. Salt-induced changes in the functions of photosynthetic apparatus were assessed using chlorophyll a fluorescence (PAM and OJIP test) and P700 photooxidation. Greater differences between the studied species in response to salinization were observed at 150 mM and 200 mM NaCl. The data revealed the stronger influence of ...
Tópico(s): Spectroscopy and Quantum Chemical Studies
2021 - Multidisciplinary Digital Publishing Institute | Plants
Abstract Discussions of the politics and practicalities of confronting health security challenges—from infectious disease outbreaks to antimicrobial resistance and the silent epidemic of noncommunicable diseases—hinge on the conceptualization of health security. There is no consensus among analysts about the specific parameters of health security. This inhibits comparative evaluation and critique, and affects the consistency of advice for policymakers. This article aims to contribute to debates ...
Tópico(s): Public Health Policies and Education
2020 - Wiley | Global Challenges
Preslava Ivanova, Duncan Light,
This paper explores motives for visiting a lightest dark (heritage) tourism attraction. Semi-structured interviews were undertaken with 24 visitors to the London Dungeon. Few visitors reported an interest in death, suffering or the macabre as important in their decision to visit, a finding which accords with research at a range of other types of darker places. Instead, most people visited from general or incidental reasons that were unrelated to the attraction's theme. However, while few visitors ...
Tópico(s): Museums and Cultural Heritage
2017 - Taylor & Francis | Journal of Heritage Tourism
Elisabeth Maria Balint, Preslava Boseva, Katharina Schury, Harald Guendel, Wolfgang Rottbauer, Christiane Waller,
Posttraumatic stress disorder (PTSD) is associated with a higher rate of arterial hypertension. However, data about prevalence rates of PTSD in patients suffering from arterial hypertension as well as the relation to blood pressure (BP) control are lacking. We recruited 145 patients with primary hypertension from March to November 2012 at the cardiologic outpatient clinic at Ulm University Medical Center. Symptoms of PTSD (assessed with the Posttraumatic Diagnostic Scale), perceived stress (Perceived ...
Tópico(s): Cardiac, Anesthesia and Surgical Outcomes
2015 - Elsevier BV | General Hospital Psychiatry
Stefka Valcheva-Kuzmanova, Krasimir Kuzmanov, Silvia Tsanova-Savova, V. Mihova, Ivan Krasnaliev, Preslava Borisova, A. Belcheva,
ABSTRACT Aronia melanocarpa fruit juice (AMFJ) is very rich in phenolic antioxidants, mainly flavonoids from the subclass anthocyanins. The aim of this study was to assess the influence of AMFJ on body and liver mass, plasma lipids and lipoprotein profiles, and the histopathology of liver and aorta in rats fed with cholesterol diets. AMFJ was applied orally for 30 days at doses of 5, 10 and 20 mL/kg. In rats fed the cholesterol-containing diets, AMFJ significantly hindered an increase in plasma lipids ( ...
Tópico(s): Antioxidant Activity and Oxidative Stress
2007 - Wiley | Journal of Food Biochemistry
Stefka Valcheva-Kuzmanova, Krasimir Kuzmanov, V. Mihova, Ivan Krasnaliev, Preslava Borisova, A. Belcheva,
Tópico(s): Antioxidant Activity and Oxidative Stress
2006 - Springer Science+Business Media | Plant Foods for Human Nutrition
Stefka Valcheva-Kuzmanova, Katia Marazova, Ivan Krasnaliev, Bistra Galunska, Preslava Borisova, A. Belcheva,
Aronia melanocarpa fruits are rich in phenolic substances-mainly flavonoids from the anthocyanin subclass. The anthocyanins are water-soluble plant pigments with antioxidant, anti-inflammatory, antimicrobial, hepatoprotective, gastroprotective and other activities. We studied the effect of A. melanocarpa fruit juice (AMFJ) on indomethacin-induced gastric mucosal damage in rats and its possible relation to the oxidative status. AMFJ (5, 10 and 20 ml kg(-1)) was applied orally as a pretreatment 1 h ...
Tópico(s): Microbial Metabolites in Food Biotechnology
2005 - Elsevier BV | Experimental and Toxicologic Pathology
Stefka Valcheva-Kuzmanova, Preslava Borisova, Bistra Galunska, Ivan Krasnaliev, A. Belcheva,
The fruits of Aronia melanocarpa are rich in anthocyanins--plant pigments with anti-inflammatory and antioxidant activity. We studied the effect of the natural fruit juice from A. melanocarpa (NFJAM) on carbon tetrachloride (CCl4)-induced acute liver damage in rats. Histopathological changes such as necrosis, fatty change, ballooning degeneration and inflammatory infiltration of lymphocytes around the central veins occurred in rats following acute exposure to CCl4 (0.2 ml kg(-1), 2 days). The administration ...
Tópico(s): Drug-Induced Hepatotoxicity and Protection
2004 - Elsevier BV | Experimental and Toxicologic Pathology
John Quinn, Preslava Stoeva, Tomáš Zelený, Toozy Nanda, Alžběta Tomanová, Vladimír Bencko,
A new 'normal' in global affairs may be erupting from large global powers to that of non-state actors and proxies committing violence through scaled conflict in a post-Westphalian world generating significant global health policy challenges. Health security of populations are multifactorial and indirectly proportional to war, conflict and disaster. Preventing conflict and avoiding the health vacuum that occurs in war and violence may be best practices for policy makers. This paper considers an approach ...
Tópico(s): Global Public Health Policies and Epidemiology
2017 - National Institute of Public Health | Central European Journal of Public Health
Hendro Wicaksono, Preslava Dobreva, Polina Häfner, Sven Rogalski,
Energy consumption in building sector has been taking a significant percentage of the total energy consumption on earth. This is due to the development of more advanced and sophisticated building appliances to fulfil the comfort requirements. The EU has responded this trend by requiring zero CO2 emission in building by 2020 and by supporting innovative research approaches for improving energy efficiency in buildings with still considering inhabitants comfort. This chapter describes an approach to ...
Tópico(s): Business Process Modeling and Analysis
2015 - Springer Science+Business Media | Communications in computer and information science
Martin Stefanov, Georgi D. Rashkov, Preslava Borisova, Emilia Apostolova,
Salt stress significantly impacts the functions of the photosynthetic apparatus, with varying degrees of damage to its components. Photosystem II (PSII) is more sensitive to environmental stresses, including salinity, than photosystem I (PSI). This study investigated the effects of different salinity levels (0 to 200 mM NaCl) on the PSII complex in isolated thylakoid membranes from hydroponically grown pea (Pisum sativum L.) and maize (Zea mays L.) plants treated with NaCl for 5 days. The data revealed ...
Tópico(s): Mitochondrial Function and Pathology
2024 - Multidisciplinary Digital Publishing Institute | Plants
Antoaneta V. Popova, Preslava Borisova, D. V. Vasil’ev,
Salinity is one of the most extreme abiotic stress factors that negatively affect the development and productivity of plants. The salt-induced injuries depend on the salt tolerance of the plant species, salt concentration, time of exposure and developmental stage. Here, we report on the response of pea plants (Pisum sativum L. cv Ran 1) to exposure to increasing salt concentrations (100, 150 and 200 mM NaCl) for a short time period (5 days) and the ability of the plants to recover after the removal ...
Tópico(s): Plant nutrient uptake and metabolism
2023 - Multidisciplinary Digital Publishing Institute | Plants
Венелин Терзиев, V. Banabakova, Preslava Dimitrova,
This paper reviews and analyzes the stages of development of social worker’s occupation as describes in details all stages of development of this process in Bulgaria. Described and analyzed are the main connections of this process as well as the cooperation of all participants in this stage as well as the end user. Presented is profile of the social worker as made is critical attempt for identification of main needs of occupational training of social activity experts. Based on this critical analysis ...
Tópico(s): Innovative Educational Techniques
2017 - RELX Group (Netherlands) | SSRN Electronic Journal
The paper examines the nature of the Bulgarian banking and currency crises in 1996-1997 and evaluates the causal link between them. The analysis shows that the banking crisis has resulted from slow structural reforms, inefficient prudential regulation and prolonged unsound lending practices. The probit model estimates illustrate that excessive credit, augmented interest rate spread and overvalued exchange rate exacerbated the banks' liquidity position. The currency crisis was a consequence of expansionary ...
Tópico(s): Global Financial Crisis and Policies
2000 - RELX Group (Netherlands) | SSRN Electronic Journal
Maya Velitchkova, Preslava Borisova, D. V. Vasil’ev, Antoaneta V. Popova,
Tópico(s): Plant responses to elevated CO2
2021 - Springer Science+Business Media | Theoretical and Experimental Plant Physiology
Duncan Light, Steve Richards, Preslava Ivanova,
Purpose The concept of “Gothic tourism” has recently been proposed within the discipline of English Literature. Such tourism is claimed to be a distinct form of special interest tourism grounded in familiarity with the Gothic, distinctive aesthetics, and experiences of frights and scares. It is increasingly common in towns and cities around the world. This paper aims to examine and critique the concept of Gothic tourism, and consider its similarities with existing forms of urban tourism. Design/methodology/ ...
Tópico(s): Geographies of human-animal interactions
2021 - Emerald Publishing Limited | International Journal of Tourism Cities
Diogo Martins, Opeyemi Babajide, Nason Maani, Salma M. Abdalla, Eduardo J. Gómez, Montira J. Pongsiri, Sheila Tlou, GM Leung, Georges C. Benjamin, Eric Goosby, Katie Dain, Jeanette Vega, Zahra Zeinali, Preslava Stoeva, Sandro Galea, Jeffrey L. Sturchio, Nana Twum-Danso,
The inclusion of social determinants of health offers a more comprehensive lens to fully appreciate and effectively address health. However, decision-makers across sectors still struggle to appropriately recognise and act upon these determinants, as illustrated by the ongoing COVID-19 pandemic. Consequently, improving the health of populations remains challenging. This paper seeks to draw insights from the literature to better understand decision-making processes affecting health and the potential ...
Tópico(s): Global Public Health Policies and Epidemiology
2021 - Springer Science+Business Media | Journal of Urban Health
Hristina Y. Hitkova, Diana Simeonova Georgieva, Preslava M. Hristova, Mariya Sredkova,
Background: The precise identification of yeasts and their antifungal sensitivity is a key factor in the choice of a suitable drug for treatment and prevention of fungal infections. Objectives: The aim of the present study was to determine in vitro susceptibility of clinical Candida albicans isolates to nine antifungal agents. Methods: A total of 61 C. albicans isolates were tested. Antifungal susceptibility was evaluated by determination of minimum inhibitory concentrations (MIC). Results: Fifty ...
Tópico(s): Nail Diseases and Treatments
2019 - Brieflands | Jundishapur Journal of Microbiology
Венелин Терзиев, V. Banabakova, Preslava Dimitrova,
Abstract This study justifies the need for building a system for research, identification and monitoring of the needs of vocational training in compliance to the constantly changing needs of the labour market. When considered in a narrower sense this problem justifies and proves the need for this activity related to social work and social workers. A method for determining the need for continuing vocational training of specialists in social work is developed and an experimental model for its implementation ...
Tópico(s): Impulse Buying and Technology Impacts
2017 - De Gruyter | International conference KNOWLEDGE-BASED ORGANIZATION
Preslava Stoeva, New Norms and Knowledge in World Politics: Protecting People, Intellectual Property and the Environment Preslava Stoeva, New Norms and Knowledge in World Politics: ...
Tópico(s): International Relations and Foreign Policy
2010 - Oxford University Press | Yearbook of International Environmental Law
Antoaneta V. Popova, Radka Vladkova, Preslava Borisova, Katya Georgieva, Gergana Mihailova, Violeta Velikova, Tsonko Tsonev, Alexander G. Ivanov,
Alterations in photosynthetic performance of lutein-deficient mutant
Tópico(s): Plant responses to elevated CO2
2022 - Institute of Experimental Botany of the Czech Academy of Sciences | Photosynthetica
John Quinn, Vladimír Bencko, Alexander V. Bongartz, Preslava Stoeva, Adrijana Atanasoska Arsov, Stefano De Porzi, Miloš Bohoněk, Ronald Ti, Jack Douglas Taylor, John T. Mitchell, Veronika Reinhard, Petr Majovsky, Jozef Kuca, Petr Král, Laszlo Fazekas, Zoltan Bubenik,
The North Atlantic Treaty Organization (NATO) is the premier and only security alliance uniting 30 countries and growing with many partner states in the provision of collective security and against threats posed by conflict and natural disasters. Security of countries and communities is increasingly threatened by a broad spectrum of unconventional types of war and disease threats - from hybrid and asymmetric to multi-domain and peer-to-peer/near-peer conflict. The NATO Centre of Excellence for Military ...
Tópico(s): Health and Conflict Studies
2020 - National Institute of Public Health | Central European Journal of Public Health
The need to engage political science and international relations in analyses of domestic and international policy making for public health is undisputable, because political processes and decisions influence and shape health policy. The urgency of this need is underlined by the complex context of the COVID-19 pandemic, which exposed the political nature of health policy, and the war in Ukraine—the latest in a series of 21st-century conflicts that are stark reminders of the profound impacts of conflict ...
Tópico(s): Global Security and Public Health
2022 - Elsevier BV | The Lancet
Abstract Background The magnitude of the noncommunicable epidemic is difficult to overstate. The projected cost of the epidemic is substantial. It disproportionately affects people in low- and middle-income countries as well as poorer and marginalised communities in high-income countries. The international community has taken various steps to address the four modifiable risk factors causing the majority of noncommunicable diseases (NCDs), however, action has so far fallen short of expectations. Both ...
Tópico(s): Global Security and Public Health
2020 - BioMed Central | BMC International Health and Human Rights