Meridiano 47-Journal of Global Studies最新文献

{"title":"The challenge of conducting marine scientific research under the COVID-19 pandemic","authors":"A. Polejack","doi":"10.20889/m47e23007","DOIUrl":"https://doi.org/10.20889/m47e23007","url":null,"abstract":"This opinion paper highlights the unseen impacts that the current COVID-19 outbreak has posted to ocean sciences, particularly in developing countries. Ocean science diplomacy, i.e. the interplay between ocean science and international affairs, present useful tools to leverage from this new normal and address the need to foster balance between regions in terms of scientific capabilities to unveil the ocean as a public good. The UN Decade of Ocean Science offers a timely framework to advance such discussions.","PeriodicalId":53765,"journal":{"name":"Meridiano 47-Journal of Global Studies","volume":"165 1","pages":""},"PeriodicalIF":0.1,"publicationDate":"2023-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86365323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"BBNJ Agreement: High Seas Biodiversity as a Common Heritage (of Mankind)?","authors":"André De Paiva Toledo","doi":"10.20889/m47e23006","DOIUrl":"https://doi.org/10.20889/m47e23006","url":null,"abstract":"The UNCLOS does not expressly address genetic resources. In 2017, the United Nations convened a conference to negotiate an Agreement on conservation and sustainable use of BBNJ. Based on UNCLOS provisions, which prohibit the modification of the principle of freedom on high seas, it is not possible for marine genetic resources on high seas to be ruled as res communis humanitatis, but as res communis.","PeriodicalId":53765,"journal":{"name":"Meridiano 47-Journal of Global Studies","volume":"1 1","pages":""},"PeriodicalIF":0.1,"publicationDate":"2023-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74068857","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hope in difficult times","authors":"","doi":"10.26565/2075-3810-2022-47-07","DOIUrl":"https://doi.org/10.26565/2075-3810-2022-47-07","url":null,"abstract":"Editorial board of the “Biophysical bulletin” scientific journal in this difficult time, together with all Ukrainian people, is continuing to work to restore the peaceful life in Ukraine as soon as possible.","PeriodicalId":53765,"journal":{"name":"Meridiano 47-Journal of Global Studies","volume":"17 1","pages":""},"PeriodicalIF":0.1,"publicationDate":"2022-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75061936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"All-ukrainian conference on molecular and cell biology with international participation, dedicated to the heroic struggle of the ukrainian people against the russian invaders","authors":"Petr Svoboda","doi":"10.26565/2075-3810-2022-47-06","DOIUrl":"https://doi.org/10.26565/2075-3810-2022-47-06","url":null,"abstract":"The All-Ukrainian Conference on Molecular and Cell Biology with international participation was held as an online event on the Zoom platform, from the 15th to the 17th of June 2022. The purpose of this event was to encourage Ukrainian scientists, to give the opportunity to colleagues from abroad to demonstrate their support to Ukraine, and to keep the scientific process ongoing even in the background of the war. Scientists of every career stage could take part in any way convenient to them. Seven sections of bioscience were available at the Conference, namely: Microbiology and Biotechnology, Genetics and Epigenetics, Molecular biology and Biorganic chemistry, Molecular oncology, Molecular physiology and Biophysics, Cell biology and System biology, and Bioinformatics. 123 scientists from Ukraine and abroad have registered for participation in the conference. 38 oral presentations, 14 poster presentations, 10 Keynote Lectures, and 1 Special Lecture were included in the Conference program. Scientists from all over Ukraine, several European countries Poland, Chech Republic, Germany, Italy, Sweden, Finland), and USA participated in the Conference. On the third day the Panel Discussion on the topic “Viruses, evolution, and the struggle for survival. Human progress in diagnosis, therapy, and prevention”, was performed. The abstract book, based on the Conference materials is published online.","PeriodicalId":53765,"journal":{"name":"Meridiano 47-Journal of Global Studies","volume":"34 1","pages":""},"PeriodicalIF":0.1,"publicationDate":"2022-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82180697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of impulse magnetic fields of extremely low frequencies on H2O2- and Fe2+-induced free radical lipid oxidation in liposomal suspensions","authors":"V. Martynyuk, Yuri V. Tseyslyer","doi":"10.26565/2075-3810-2022-47-04","DOIUrl":"https://doi.org/10.26565/2075-3810-2022-47-04","url":null,"abstract":"Background: For a long time, special attention in experimental biology and medicine is paid to free radical processes involving reactive oxygen species. In electromagnetic biology, the interest in free radical oxidation in biological membranes has increased significantly due to the discovery of spin mechanisms of magnetic fields on free radical processes. In the present day, these mechanisms are considered to be key in the processes of magnetoreception in living organisms. Liposomes, as the simplest models of biological membranes, are often used to study the primary mechanisms of action of different factors on the structural and functional properties of membranes. However, the influence of ecological significant extremely low-frequency magnetic fields on free radical oxidation in liposomal suspensions has not been studied enough.\u0000\u0000Objectives: The elucidation of the peculiarities of the influence of the extremely low frequency pulsed magnetic fields (ELF PMF) on H2O2- and Fe2+-induced peroxidation of natural phospholipids in liposomal suspensions.\u0000\u0000Materials and methods: The liposomal suspensions in phosphate buffer pH=7.4 were used. According to the literature and own results on light scattering the average diameter of liposomes was about 500Å. Ultra-weak chemiluminescence of liposomal suspensions was recorded using a device that operated in the mode of single photons counting. It consisted of a light-insulated cuvette unit where the test samples were placed, as well as a temperature sensor and a solenoid, which was used to create the PMF. Optical contact of the test samples with the photoelectron multiplier was carried out using a light guide. The recording system consisted of a broadband photomultiplier tube detector — FEU-130, which was at a temperature of –20°C. The pulse analyzer AI-256 was used to separate the useful signal that corresponded to the registration of single chemiluminescence light quanta. The voltage on the photomultiplier tube detector was applied in the range of current-voltage characteristics of this detector, in which a random voltage fluctuation had a minimal effect on the measurement of the useful signal. The number of light quanta that were recorded for defined time intervals characterized the overall intensity of the process of free radical oxidation of lipids in the experimental samples. The pulsed magnetic field was created using a solenoid coil located in the cuvette part. PMF was created using a serial generator G6-28. The magnetic field pulses were rectangular in shape with variable polarity for a period of oscillations. The induction of PMF was monitored using microteslameter G-79. The series of extremely low frequencies (5–80 Hz) and induction (5–500 μT) of PMF was chosen due to their environmental and physiological significance.\u0000\u0000Results: PMF of different frequencies with induction of 5 and 50 μT did not affect (p>0.05) H2O2- and Fe2+-induced lipid oxidation in liposomal suspensions. Statistically significant c","PeriodicalId":53765,"journal":{"name":"Meridiano 47-Journal of Global Studies","volume":"42 1","pages":""},"PeriodicalIF":0.1,"publicationDate":"2022-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85582038","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Photomorphogenesis and content of carbohydrates in the axial organs of field pean seedlings under the influence of selective light","authors":"V. Zhmurko, O. O. Avksentieva, Y. Batuieva","doi":"10.26565/2075-3810-2022-47-03","DOIUrl":"https://doi.org/10.26565/2075-3810-2022-47-03","url":null,"abstract":"Background: Light is a multifaceted exogenous factor that plays an important role in plant growth and development. The spectral composition of light is determinative for the regulation of photomorphogenetic processes in plants. Nowadays plants have several groups of photoreceptors that include receptors of red (RL) and far red light (FRL) — phytochromes; receptors of UV-A, blue (BL) and green (GL) light — cryptochromes, phototropins, proteins of the ZEITLUPE family, as well as the UV-B receptor — UVR8 protein. One of the possible mechanisms that realize an activation of photoreceptor systems in the plant may be concerned with carbohydrate metabolism. The research of morphogenetic reactions of seedlings under the action of selective light irradiation by activating photoreceptor systems is important for understanding the mechanisms of regulation of the program of plant organism`s ontogenesis.\u0000\u0000The aim of this study was to investigate the effect of selective light of different spectrum: RL (660 nm), GL (530 nm) and BL (450 nm) on growth reactions, morphogenesis and content of soluble carbohydrate in axial organs of seedlings of long-day plants.\u0000\u0000Materials and methods: 10-day etiolated seedlings of pea Maecenat variety were used for experiments. Activation of photoreceptor systems by red (RL, 660nm), green (GL, 530nm) and blue (BL, 450nm) light was performed for 5 days for 30 minutes using LED matrices. The growth reaction, morphogenesis and the content of soluble mono- and oligosugars in the axial organs of seedlings were analyzed.\u0000\u0000Results: The axial organs of seedlings differ in their response to irradiation with selective light. The root system is more sensitive to the action of selective light than the shoot of the seedlings of the long-day plants of the pea Maecenat variety. Activation of photoreceptor systems stimulates growth processes, activates the processes of photomorphogenesis and the biosynthesis of oligosugars de novo, most likely sucrose. Among the spectra of selective light, the maximum stimulating effect is shown by irradiation of the GL (530 nm) in the reactions of the aboveground part and roots. RL (660 nm) and BL (450 nm) show opposite effects: RL initiates a photomorphogenetic program of shoot part, and BL has a greater effect on photomorphogenesis of root system.\u0000\u0000Conclusions: Different levels of growth, morphogenetic processes and changes in the content of soluble carbohydrates are probably related to the ability of photoreceptor systems to activate the realization of different ways of photomorphogenesis in the axial organs of seedlings under the influence of selective light of a certain spectrum.","PeriodicalId":53765,"journal":{"name":"Meridiano 47-Journal of Global Studies","volume":"27 1 1","pages":""},"PeriodicalIF":0.1,"publicationDate":"2022-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76858283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of the sodium fluoride on the development and survival of the loach embryos","authors":"I. R. Grytsaj, S. Mandzynets, M. Bura","doi":"10.26565/2075-3810-2022-47-02","DOIUrl":"https://doi.org/10.26565/2075-3810-2022-47-02","url":null,"abstract":"Background: The study of fluoride effects at the cellular level is still essential for biophysics, medicine, and ecology as one of the most common environmental pollutants. Its impact on embryonic objects is poorly understood.\u0000\u0000Objectives: The aim of the work was: 1) to study the effect of sodium fluoride (in the minimum concentration to inhibit growth) on the morphological development of loaсh embryos; 2) evaluation of the degree of survival of embryos in the presence of sodium fluoride in the incubation medium and determination of the coefficient Ks.\u0000\u0000Materials and methods: Ovulation in loach females (Misgurnus fossilis L.) was stimulated by intramuscular injection of female chorionic gonadotropin (500 units), eggs were obtained by 36 h after stimulation, fertilized in Petri dishes with a suspension of sperm according to Neifach A. A. The stages of development were observed visually used a binocular microscope MBS-9 with a photo camera. The experimental embryos were incubated in Goltfreter's solution with the addition of sodium fluoride to a final minimum concentration to inhibit growth of 500 μmol/l.\u0000\u0000Results: Sodium fluoride inhibits the development of loach embryos and leads to developmental defects. The noticeable developmental defects caused by sodium fluoride were a reduction in the size of the larvae's head and tail, low body pigmentation, changes in the eye diameter, and embryonic touch reflex. As a result of the accumulation of fluoride in embryonic cells, on the third day of development, embryonic mortality increased to 88,9%. On 12 days under the action of sodium fluoride, the total number of larvae was about 2%.\u0000\u0000Conclusions: The ability of NaF to act as a direct teratogen was tested on the cold-blooded embryo model, the same effect was found by other investigators on the FETAX model. The possibility that sodium fluoride may cause toxic and/or neuromuscular developmental defects in human embryos also should be considered. Avoiding excessive getting of fluoride in the body by limiting the consumption of foods or beverages high in fluoride, the use of fluoride in dental care products, etc. requires detailed assessment.","PeriodicalId":53765,"journal":{"name":"Meridiano 47-Journal of Global Studies","volume":"20 1","pages":""},"PeriodicalIF":0.1,"publicationDate":"2022-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78314738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"7th International conference NBP-2021 “Nanobiophysics: fundamental and applied aspects”","authors":"V. Karachevtsev, M. Kosevich, G. Dovbeshko","doi":"10.26565/2075-3810-2022-47-01","DOIUrl":"https://doi.org/10.26565/2075-3810-2022-47-01","url":null,"abstract":"7th International conference “NANOBIOPHYSICS: Fundamental and Applied Aspects” (NBP-2021) took place on October 4-8, 2021 at B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine (Kharkiv, Ukraine). Previous six conferences, starting from 2009, were organized due to joint efforts of B. Verkin Institute for Low Temperature Physics and Engineering of the NAS of Ukraine and Institute of Physics of the NAS of Ukraine on biennial basis in Kharkiv and Kyiv alternatively. Among 80 registered participants from 16 countries about 40 scientists have presented their lectures and posters offline and other participants were joining the sessions online. 16 keynote lectures and 18 oral presentations were made and 51 posters were discussed offline and online. The goal of the conference was achieved: urgent problems, advances and perspectives of the topical scientific direction of nanobiophysics which embraces achievements of modern molecular biophysics and nanotechnology were discussed. The subjects of physical aspects of biomolecular nanosystems, properties of biomolecules on nanoparticles and nanostructured surfaces, nanobiohybrids formation by 1-D or 2-D nanomaterials with bioobjects, theoretical calculations and computer modeling of nanobiosystems, and applied aspects of nanobiophysics were highlighted at the related sessions. Several additional accompanying events were organized in the framework of the conference, including a Round Table “How biophysics and nanosciences meet modern challenges: the case of COVID-19”, a special session of the Ukrainian Biophysical Society, and SPIE (The International Society of Optics and Photonics) and OSA (The Optical Society) Workshop “Career development opportunities for young scientist and students”. Book of abstract based on NBP-2021 materials was published.","PeriodicalId":53765,"journal":{"name":"Meridiano 47-Journal of Global Studies","volume":"1 1","pages":""},"PeriodicalIF":0.1,"publicationDate":"2022-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85681251","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mercosul: a trajetória em formação","authors":"Antônio Carlos Lessa, Virgílio Caixeta Arraes","doi":"10.20889/4127","DOIUrl":"https://doi.org/10.20889/4127","url":null,"abstract":"","PeriodicalId":53765,"journal":{"name":"Meridiano 47-Journal of Global Studies","volume":"93 1","pages":""},"PeriodicalIF":0.1,"publicationDate":"2022-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82394031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The growth of graduate studies programs in International Relations in Brazil","authors":"Antônio Carlos Lessa","doi":"10.20889/m47e201020","DOIUrl":"https://doi.org/10.20889/m47e201020","url":null,"abstract":"This article seeks to analyze the effects and foundations of the large expansion of postgraduate programs in International Relations in Brazil, which took place recently.","PeriodicalId":53765,"journal":{"name":"Meridiano 47-Journal of Global Studies","volume":"3 1","pages":""},"PeriodicalIF":0.1,"publicationDate":"2022-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75512330","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}