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1.
Mitochondrial DNA B Resour ; 9(8): 1010-1014, 2024.
Article in English | MEDLINE | ID: mdl-39113749

ABSTRACT

Hypecoum erectum L., a widespread species in northern Eurasia, is a valuable medicinal plant, but its chloroplast genome has not previously been reported. We determined its complete chloroplast genome using a high-throughput sequencing technique. Its total length was 169,241 bp, consisting of a large single-copy region of 93,301 bp and a small single-copy region of 17,316 bp, separated by a pair of inverted repeat regions of 29,312 bp. A total of 140 genes were annotated, including 91 protein coding genes, 41 tRNA genes, and eight rRNA genes. The phylogenetic analysis shows that H. erectum and H. zhukanum of the subfamily Hypecoideae are monophyletic with the highest support.

2.
PNAS Nexus ; 3(8): pgae292, 2024 Aug.
Article in English | MEDLINE | ID: mdl-39166102

ABSTRACT

Can foreign conflicts affect attitudes in nonbelligerent countries? A large literature studies the effects of conflicts and wars on countries that are directly involved, without considering the potential consequences for other nonbelligerent countries that might nevertheless be threatened. To address this question, we examine how the Russian invasion of Ukraine affected 12 economic and political attitudes using survey data covering eight European countries. We use a natural experiment whereby the timing of the invasion overlapped with the fieldwork of a cross-national individual-level survey in these eight countries. We find that the war increased support for democracy, redistribution, support for Europe, and immigration, while it reduced authoritarian attitudes. Our findings highlight the impact of foreign conflicts on a wide range of attitudes in countries that are externally threatened, but neither directly involved militarily, nor necessarily very close to the conflict.

3.
Perspect Clin Res ; 15(3): 128-133, 2024.
Article in English | MEDLINE | ID: mdl-39140013

ABSTRACT

Purpose: Although the Americas and Europe have historically dominated the global research landscape, emerging economies - Brazil, Russia, India, China, and South Africa (BRICS) have significantly increased their contributions in recent years. This article studies clinical trial trends in the BRICS nations between 2018 and 2022 and compares it with trends in the G7 nations (comprising Canada, France, Germany, Italy, Japan, the UK, the USA, and the European Union). This will help stakeholders in planning drug development strategies. Materials and Methods: Data were collected from the World Health Organization International Clinical Trials Registry Platform (WHO ICTRP) and the World Bank database. An electronic search was done for the total number of trials registered between January 1, 2018, and March 15, 2023. Information was analyzed based on the year of registration, therapeutic area, type of intervention, sponsorship, and type of special population. The trial density indices (TDIs) were calculated based on population (Xi) and gross domestic product (GDP) (Yi) using author-derived formulae. Results: Altogether 2, 77, 536 trials from the BRICS and G7 were registered. China and the US had the most trials among the BRICS and G7, respectively. Between 2018 and 2022, the gap between the BRICS and G7 steadily reduced. The most common indication for clinical trials among the BRICS was cancer. Based on population, the TDI was the highest in China and the lowest in Russia. In proportion to the GDP, the TDI was maximum in Russia and minimum in India. Conclusion: There is a remarkable reduction in the gap in clinical trial trends between the BRICS and G7 nations. Among the BRICS, India and China are at the forefront in drug development. There is scope for improvement in trial density based on India's population and GDP. Stakeholders are likely to utilize the strengths of the BRICS as an attractive destination for investment in this area.

4.
Int J Circumpolar Health ; 83(1): 2386783, 2024 Dec.
Article in English | MEDLINE | ID: mdl-39106414

ABSTRACT

The anthropometric index that best predicts cardiometabolic risk remains inconclusive. This study therefore assessed the prevalence of obesity using six indices and compared their associations with obesity-related cardiometabolic disorders. We determined obesity prevalence according to body mass index, waist circumference, waist-to-hip ratio, waist-to-height ratio (WHtR), body fat percentage and fat mass index (FMI) using data from the Know Your Heart study (n = 4495, 35-69 years). The areas under the receiver operating characteristic curves (AUCs) provided predictive values of each index for detecting the presence of hypertension, hypercholesterolaemia and diabetes. Age-standardised obesity prevalence significantly varied according to anthropometric index: from 17.2% (FMI) to 75.8% (WHtR) among men and from 23.6% (FMI) to 65.0% (WHtR) among women. WHtR had the strongest association with hypertension (AUC = 0.784; p < 0.001) and with a combination of disorders (AUC = 0.779; p < 0.001) in women. In women, WHtR also had the largest AUCs for hypercholesterolaemia, in men - for hypertension, diabetes and a combination of disorders, although not all the differences from other obesity indices were significant. WHtR exhibited the closest association between hypertension and a combination of disorders in women and was non-inferior compared to other indices in men.


Subject(s)
Diabetes Mellitus , Hypercholesterolemia , Hypertension , Obesity , Humans , Male , Middle Aged , Obesity/epidemiology , Female , Hypertension/epidemiology , Adult , Prevalence , Hypercholesterolemia/epidemiology , Russia/epidemiology , Aged , Diabetes Mellitus/epidemiology , Body Mass Index , Anthropometry , Risk Factors
5.
J Health Econ ; 97: 102913, 2024 Jun 26.
Article in English | MEDLINE | ID: mdl-38986213

ABSTRACT

Alcohol control policies are implemented to reduce alcoholism and related harms around the globe. This work examines the effects of a policy that restricted when alcohol could be purchased on child outcomes in Russia. To identify causal impacts, I exploit variation in the timing and severity of the restriction, which was implemented in Russian states between 2005 and 2010. Utilizing household survey data and a difference-in-differences estimation approach, I find that the policy has improved children's physical health, with younger children being more affected, and additionally has decreased a variety of risky behavior indicators. Potential mechanisms for these effects include alcohol consumption, parental employment, household income, family stability, and time use. This work demonstrates that policies controlling parental substance access can have important effects on child health.

6.
Article in Russian | MEDLINE | ID: mdl-39003557

ABSTRACT

The article considers on the basis of analysis of archival documents issue of rendering assistance by the Soviet Union to the countries of Eastern Europe to organize production of penicillin. It is established that by the mid of 1950s, modern powerful plants were launched in Bulgaria, Romania and Czechoslovakia by the forces of Soviet engineers . Their construction was carried out on preferential terms for countries-customers. The mutually beneficial cooperation in sphere of production of antibiotics carried out and with other countries of this region. It is demonstrated that the USSR, performing task of enormous humanitarian significance in conditions of the Cold War, simultaneously implemented another goal - formation of loyalty of population of these countries and organization of coalition of friendly states on its Western borders.


Subject(s)
Penicillins , Humans , USSR , History, 20th Century , Penicillins/history , Europe, Eastern , Drug Industry/history , Drug Industry/organization & administration , Anti-Bacterial Agents/history
7.
Article in Russian | MEDLINE | ID: mdl-39003556

ABSTRACT

The year of 1992 is very important milestone in history of Russian pharmaceutical market. It began not in January 1922, but in December 1991, when the President and Government enactments to open free market for medications were promulgated. The advisers of B. N. Yeltsin considered market economy as reliable mean to overcome medicinal deficiencies, corruption and bureaucratic monopoly. However, panacea did not work. Moreover, it caused completely new problems. The human and state security implies protection from threats of dependencies. The unprepared dive into market plunged Russians and the country into severe dependence on import of medications and foreign pharmaceutical companies. The proposed study expands our publications in this journal and in journal "Pharmacy" in 2022. At that time, analysis of medication scarcity was implemented on the basis of published sources and relied on journalistic evidences. The current study is carried out on the basis of archival documents of the Ministry of Health Care of the Russian Federation and authors interviews of representatives of regulator. The second report reconstructs the sequence of the emergence and correlation of the structural elements of the Russian pharmaceutical market.


Subject(s)
Drug Industry , Russia , Humans , History, 20th Century , History, 21st Century , Pharmaceutical Preparations/supply & distribution
8.
Article in English | MEDLINE | ID: mdl-39054640

ABSTRACT

This study aimed to assess the levels and investigate socioeconomic, demographic, and health-related predictors of winter and summer physical activity (PA) in Russia using the data from the Know Your Heart population survey conducted in Novosibirsk and Arkhangelsk (2015-2018; n = 5068; aged 35-69 years). Employing a series of probit, Tobit, and the Cragg models, we separated the predictors of the probability of participating in leisure-time PA from the predictors of time spent in PA. Our study showed that financial constraints limited males' participation in winter PA (probability of participation decreased by 12 percentage points) and females' engagement in winter and summer PA (decrease in the number of hours of practicing PA by approximately 1 h a week). Education, self-reported health, smoking, and cues to action had different impacts on both probability and time spent in PA in winter and summer. We also found significant gender differences in participation and time spent in PA across seasons. Older age, poor health, and smoking were greater obstacles to PA for males compared to females both in winter and summer. However, males were more likely to follow physician's advice to lose weight and take up physical exercise. Information campaigns that promote physical activities, including those that are free of charge, are needed to help limit barriers to PA for people with low socioeconomic status and individuals with little or no exercise experience. Also, making sports more accessible to citizens by providing free and low-cost sports facilities can increase their participation and time spent in PA, improving individual health and productivity.

9.
Vet Parasitol Reg Stud Reports ; 53: 101075, 2024 Aug.
Article in English | MEDLINE | ID: mdl-39025551

ABSTRACT

To determine the current reservoir status and prevalence of Opisthorchis felineus infection in opisthorchiosis-endemic areas, feces samples were collected from 103 cats and 101 dogs admitted to shelters or discount sterilization centers from various districts of Novosibirsk city and from villages and towns along the Ob River (Novosibirsk Oblast). The feces samples were evaluated using two methods simultaneously: the formalin-ether sedimentation assay and a modified flotation assay. The prevalence of opisthorchiid infection was higher among cats (12.6%; 95% confidence interval 6.9-20.6%) than among dogs (4.0%; 95% confidence interval 1.1-9.8%). Overall prevalence of endoparasites among cats was 42.7% (five helminthic and four protozoan species) and among dogs 51.5% (eight helminthic and five protozoan species). Among the parasites found in the dogs, the prevalence of Sarcocystis sp. was the highest (16.8%), and in cats, the highest prevalence was shown by Giardia sp. and Toxocara cati (14.6% for each species). These results confirm the considerable contribution of stray cats and dogs to the maintenance of opisthorchiid eggs in the environment; these data should be taken into account for the development of effective control and education programs.


Subject(s)
Cat Diseases , Dog Diseases , Feces , Animals , Cats , Dogs , Cat Diseases/epidemiology , Cat Diseases/parasitology , Dog Diseases/epidemiology , Dog Diseases/parasitology , Siberia/epidemiology , Prevalence , Feces/parasitology , Opisthorchiasis/epidemiology , Opisthorchiasis/veterinary , Opisthorchiasis/parasitology , Male , Helminthiasis, Animal/epidemiology , Helminthiasis, Animal/parasitology , Female , Opisthorchis/isolation & purification
10.
Scand J Psychol ; 2024 Jul 21.
Article in English | MEDLINE | ID: mdl-39034432

ABSTRACT

The European Union (EU) is portrayed as a "normative power" that promotes democracy. How does identifying with the EU identity predict citizens' responses to a war between two non-EU countries, where one (Ukraine) appears as the victim (i.e., a nation suffering significant harm as a result of military aggression by another country) and the other (Russia) as the aggressor (i.e., a nation initiating military aggression against another country)? This study tested two contrasting, yet not mutually exclusive hypotheses. Based on the underlying idea that Ukraine is perceived to share similar (European) values while Russia is perceived to deviate from these values, the "humanitarian influence of the EU identity hypothesis" hypothesized that identification with the EU identity predicts increased support for the victim group (Ukraine) and condemnation of the aggressor group over time. Based on the "protective effect of EU identity hypothesis," however, a reverse temporal order was also hypothesized. We conducted a two two-wave study among Greek participants. Our findings provided full support for the first hypothesis and partial support for the second hypothesis. Identification with EU identity predicts increasingly stronger opposition to an intergroup conflict between non-EU countries.

11.
Foods ; 13(13)2024 Jul 04.
Article in English | MEDLINE | ID: mdl-38998640

ABSTRACT

The Russia-Ukraine conflict is a growing concern worldwide and poses serious threats to regional and global food security. Using monthly trade data for maize, rice, and wheat from 2016/1 to 2023/12, this paper constructs three international crop trade networks and an aggregate international food trade network. We aim to examine the structural changes following the occurrence of the Russia-Ukraine conflict. We find significant shifts in the number of edges, average in-degree, density, and efficiency in the third quarter of 2022, particularly in the international wheat trade network. Additionally, we have shown that political reasons have caused more pronounced changes in the trade connections between the economies of the North Atlantic Treaty Organization and Russia than with Ukraine. This paper could provide insights into the negative impact of geopolitical conflicts on the global food system and encourage a series of effective strategies to mitigate the negative impact of the conflict on global food trade.

12.
Cureus ; 16(5): e61399, 2024 May.
Article in English | MEDLINE | ID: mdl-38953085

ABSTRACT

Adult-onset Still's disease (AOSD) is a rare autoinflammatory disease characterized by nonspecific symptoms such as fever, maculopapular rash, and arthralgias. The exact etiology and pathogenesis remain unclear despite advancements in medical science. Diagnosis is typically established using the Yamaguchi criteria, which include a negative antinuclear antibody (ANA) test as one of the minor criteria. However, some patients with AOSD exhibit positive ANA and even positive antineutrophil cytoplasmic antibodies (ANCA), complicating the diagnostic process. We present the case of a 19-year-old Asian woman of Yakut ethnicity who initially presented with symptoms resembling an upper respiratory tract infection. Laboratory tests revealed the presence of both ANA and ANCA. The diagnosis of AOSD was confirmed based on clinical presentation and the Yamaguchi criteria. Subsequent pulse therapy with prednisolone resulted in significant clinical improvement and a one-year remission. A review of the literature revealed that simultaneous ANCA and ANA positivity in AOSD has not been previously reported. Follow-up over 12 months showed no evidence of other autoimmune or autoinflammatory diseases, suggesting that the positive ANA and ANCA results may be either false positives or atypical laboratory manifestations in AOSD, which should be considered in the diagnosis.

13.
Sci Rep ; 14(1): 15342, 2024 07 03.
Article in English | MEDLINE | ID: mdl-38961196

ABSTRACT

Mitochondrial forms account approximately 1-2% of all nonsyndromic cases of hearing loss (HL). One of the most common causative variants of mtDNA is the m.1555A > G variant of the MT-RNR1 gene (OMIM 561000). Currently the detection of the m.1555A > G variant of the MT-RNR1 gene is not included in all research protocols. In this study this variant was screened among 165 patients with HL from the Republic of Buryatia, located in the Baikal Lake region of Russia. In our study, the total contribution of the m.1555A > G variant to the etiology of HL was 12.7% (21/165), while the update global prevalence of this variant is 1.8% (863/47,328). The m.1555A > G variant was notably more prevalent in Buryat (20.2%) than in Russian patients (1.3%). Mitogenome analysis in 14 unrelated Buryat families carrying the m.1555A > G variant revealed a predominant lineage: in 13 families, a cluster affiliated with sub-haplogroup A5b (92.9%) was identified, while one family had the D5a2a1 lineage (7.1%). In a Russian family with the m.1555A > G variant the lineage affiliated with sub-haplogroup F1a1d was found. Considering that more than 90% of Buryat families with the m.1555A > G variant belong to the single maternal lineage cluster we conclude that high prevalence of this variant in patients with HL in the Baikal Lake region can be attributed to a founder effect.


Subject(s)
DNA, Mitochondrial , Founder Effect , Hearing Loss , Humans , Russia/epidemiology , Female , Male , Hearing Loss/genetics , Hearing Loss/epidemiology , Prevalence , DNA, Mitochondrial/genetics , Adult , Child , Adolescent , Haplotypes , Child, Preschool , Middle Aged , Lakes , Young Adult
14.
Int J Soc Psychiatry ; : 207640241264662, 2024 Jul 25.
Article in English | MEDLINE | ID: mdl-39049605

ABSTRACT

BACKGROUND: Since the Russian full-scale invasion of Ukraine, over 10 million Ukrainians have been displaced from their homes. This has contributed to an increase in post-traumatic stress (PTS) symptoms in both refugees and internally displaced persons (IDPs). Previous research has suggested that refugees may experience higher levels of PTS due to additional stressors inherent in migration to a new country, language barriers and separation from family and social support. PTS symptoms may also be exacerbated by avoidant coping which we proposed would be more prevalent amongst refugees because of the isolating effects of migration-related stressors. AIMS: The present study aimed to investigate the relationship between PTS symptoms, resilience and avoidant coping in refugees and IDPs. We predicted that refugees would report higher levels of PTS symptoms and use of avoidant coping strategies, and that avoidant coping would mediate the effect of resilience on PTS symptoms. We tested a moderated mediation model to examine whether this effect differed between IDPs and refugees. METHODS: A total of 229 women (108 IDPs and 121 refugees), who were displaced after the full-scale invasion, were recruited using online platforms and volunteering centres. They completed an online questionnaire comprising measures of PTS, resilience and coping. RESULTS: We found no significant differences in resilience, PTS symptoms or reported use of avoidance coping strategies between refugees and IDPs. As expected, avoidance coping mediated the negative association between resilience and PTS symptoms, but no group differences in this effect were observed. CONCLUSIONS: Contrary to previous research, our findings indicate that PTS symptoms may be similarly problematic for refugees and IDPs. This may be due to increased time since the invasion as many refugees may have had time to adjust. Use of avoidant coping strategies may exacerbate PTS symptoms and our study highlights the need for mental health interventions aimed at reducing PTS symptoms in Ukrainian IDPs and refugees through fostering resilience and adaptive coping strategies.

15.
BMC Surg ; 24(1): 183, 2024 Jun 14.
Article in English | MEDLINE | ID: mdl-38877409

ABSTRACT

The Russia-Ukraine war is associated with critical and severe thoracoabdominal injuries. A more specific approach to treating patients with thoracoabdominal injury should also include minimally invasive technologies. It remains unclear about the utility of using video-assisted thoracoscopic surgery (VATS) and laparoscopy in patients with thoracoabdominal injury. The aim of this study was to investigate and evaluate the utility of video-assisted thoracoscopic surgery, laparoscopy as well as magnetic tool applications for the management of severe thoracoabdominal injury in combat patients injured in the ongoing war in Ukraine and treated in the Role 2 deployed hospital. Patients and methods 36 male combat patients thoracoabdominal injury were identified for the study during the first 100 days from February, 24 2022. These individuals were diagnosed with thoracoabdominal GSW in the Role 2 hospital (i.e. deployed military hospital) of the Armed Forces of Ukraine. Video-assisted thoracoscopy surgery (VATS) and laparoscopy with application of surgical magnetic tools were applied with regards to the damage control resuscitation and damage control surgery. Results In 10 (28%) patients, VATS was applied to remove the metal foreign body fragments. Both thoracotomy and laparotomy were performed in 20 (56%) hemodynamically unstable patients. Of these 20 patients, the suturing of the liver was performed in 8 (22%) patients, whereas peri-hepatic gauze packing in 12 (33%) patients. Massive injury to the liver and PI 2.0-3.0 were diagnosed in 2 (6%) patients. Lethal outcome was in 1 (2.8%) patient. Conclusions Thoracoabdominal gunshot injuries might be managed at Role 2 hospitals by using video-assisted thoracoscopy (VATS) and laparoscopy accompanied by surgical magnetic tools. Damage control surgery and damage control resuscitation must be applied for patients in critical and severe conditions.


Subject(s)
Abdominal Injuries , Laparoscopy , Thoracic Injuries , Thoracic Surgery, Video-Assisted , Wounds, Gunshot , Humans , Wounds, Gunshot/surgery , Ukraine , Male , Adult , Thoracic Injuries/surgery , Thoracic Injuries/diagnosis , Thoracic Surgery, Video-Assisted/methods , Laparoscopy/methods , Abdominal Injuries/surgery , Abdominal Injuries/diagnosis , Hospitals, Military , Young Adult , Treatment Outcome , Retrospective Studies , Laparotomy/methods
16.
J Environ Manage ; 364: 121399, 2024 Jul.
Article in English | MEDLINE | ID: mdl-38878570

ABSTRACT

The war in Ukraine has had a devastating impact on the environment. Military actions have caused the release of hazardous substances into the environment, such as pollutants and toxic chemicals, that have contaminated the water, soil, and air, posing a threat to both human health and the environment. This has resulted in widespread destruction and contamination of natural habitats and resources and has disrupted wildlife populations and ecosystems. The impacts of military activity on the soils of protected areas are particularly critical, as they are the basis of biotic and landscape diversity and require special management and scientifically based monitoring measures even in peaceful conditions. In this context, this communication paper aims to provide an overview of the impacts of the war on the soils in four Ukrainian protected areas, namely Chornobyl Radiation and Ecological Biosphere Reserve; Desniansko-Starohutskyi National Nature Park; Holosiivskyi National Nature Park, and Hetmanskyi National Nature Park. To address these aspects, this paper combined GIS analysis and secondary data including soil samples obtained during field expeditions, to provide evidence of how ground battles, occupation, terrestrial land mines, and explosions can severely impact the soils. Practical and theoretical implications of the military actions are also discussed.


Subject(s)
Conservation of Natural Resources , Ukraine , Ecosystem , Soil , Humans , Warfare , Environment
17.
Acta Ophthalmol ; 2024 Jun 01.
Article in English | MEDLINE | ID: mdl-38822684

ABSTRACT

PURPOSE: To assess associations between atrial fibrillation/atrial flutter (AF) and ocular parameters and diseases. METHODS: The population-based Ural Eye and Medical Study (UEMS) and the Ural Very Old Study (UVOS) included 4894 individuals (age: 40+ years) and 835 individuals (age: 85+ years), respectively. RESULTS: In the UEMS, AF prevalence (80/4894; 1.6%; 95% CI: 1.3, 2.0) increased from 1/1029 (0.1%) in the age group of 40 to <50 years to 29/619 (4.7%) and 12/159 (7.5%) in the age groups of 70 to <80 years and 80+ years, respectively. Higher AF prevalence correlated with older age (OR: 1.08; 95% CI: 1.04, 1.12; p < 0.001), urban region of habitation (OR: 1.08; 95% CI: 1.04, 1.12; p < 0.001), higher prevalence of cardiovascular disease/stroke (OR: 2.50; 95% CI: 1.32, 4.72; p < 0.001) and lower prevalence of neck pain (OR: 0.35; 95% CI: 0.14, 0.85; p = 0.02), higher serum concentration of bilirubin (OR: 1.03; 95% CI: 1.02, 1.05; p < 0.001) and lower prothrombin index (OR: 0.96; 95% CI: 0.93, 0.99; p = 0.003), higher stage of arterial hypertension (OR: 1.52; 95% CI: 1.01, 2.28; p = 0.04) and higher ankle-brachial index (OR: 22.1; 95% CI: 4.45, 1.10; p < 0.001). In that model, AF prevalence was not associated with ocular parameters such as intraocular pressure (p = 0.52), retinal nerve fibre layer thickness (p = 0.70), refractive error (p = 0.13), axial length (p = 0.14), nuclear cataract degree (p = 0.50) and prevalence (p = 0.40), cortical cataract degree (p = 0.43) and presence (p = 0.17), lens pseudoexfoliation (p = 0.58), status after cataract surgery (p = 0.38), age-related macular degeneration prevalence (p = 0.63), open-angle glaucoma presence (p = 0.90) and stage (p = 0.55), angle-closure glaucoma prevalence (p = 0.99) and stage (p = 0.99), diabetic retinopathy prevalence presence (p = 0.37) and stage (p = 0.32), and myopic macular degeneration (p = 0.98). In the UVOS, similar results were obtained. CONCLUSIONS: In these multi-ethnic populations from Russia, AF prevalence was not associated with any major ocular disease and may not play a major role in the pathogenesis of these disorders.

18.
Ambio ; 53(8): 1246-1250, 2024 Aug.
Article in English | MEDLINE | ID: mdl-38822968

ABSTRACT

Polar regions are critically implicated in our understanding of global climate change. This is particularly the case for the Arctic, where positive feedback loops and climate tipping points enhance complexity and urgency. Half of the Arctic and much of the world's permafrost zone lie within Russian territory. Heightened geopolitical tensions, however, have severely damaged scientific collaboration between Russia and previously well established academic partners in western countries. Isolation is now causing increasingly large data gaps in arctic research that affect our ability to make accurate predictions of the impact of climate change on natural and societal systems at all scales from local to global. Here, we argue that options to resume both practical knowledge of collaborative working and flows of research data from Russia for global arctic science must continue to be asserted, despite an increasing tendency for the Arctic to become disconnected. Time is short, as preparations for the fifth International Polar Year begin to gather momentum. While sanctions remain in place, efforts to foster peer to peer connections and re-activate effective institutional cooperation are vital to address the grand challenges of global climate change.


Subject(s)
Climate Change , Arctic Regions , Russia , International Cooperation
19.
Proc Biol Sci ; 291(2023): 20240537, 2024 May.
Article in English | MEDLINE | ID: mdl-38747705

ABSTRACT

The noasaurid ceratosaur Kiyacursor longipes gen. et sp. nov. is described based on a fragmentary skeleton including cervical vertebra, pectoral girdle, humerus and hind limbs from the Lower Cretaceous (Aptian) Ilek Formation at Shestakovo 1 locality in Western Siberia, Russia. This is the first ceratosaur from the Early Cretaceous of Asia, extending the stratigraphic range of Ceratosauria by 40 Myr on that continent. Kiyacursor shares unique hind limb proportions with Elaphrosaurus and Limusaurus, suggesting improved cursorial ability. These taxa show an ostrich-like specialization of the pes, with a large third metatarsal and greatly reduced second metatarsal. By contrast, all other fast running non-avian theropod dinosaurs have an arctometatarsalian pes, with the third metatarsal strongly reduced proximally. The new taxon lived in the Early Cretaceous ecosystem containing a number of other Jurassic relics, such as stem salamanders, protosuchian and shartegosuchid crocodyliforms, tritylodontid synapsids and docodontan mammaliaforms.


Subject(s)
Dinosaurs , Fossils , Animals , Dinosaurs/anatomy & histology , Dinosaurs/classification , Fossils/anatomy & histology , Siberia , Biological Evolution
20.
Heliyon ; 10(10): e31382, 2024 May 30.
Article in English | MEDLINE | ID: mdl-38813195

ABSTRACT

We analysed herding behaviour in the recent pandemic and conflict. We employed the cross-sectional dispersion of daily stock returns to estimate herding's intensity in the Saudi stock market. We conducted all analyses for the entire sample and four sub-samples. Additionally, we investigate the existence of the asymmetry in the investors' responses; whether there are differences between up and down markets and between high-volatility and low-volatility days. We found that herding did not occur in the pre-COVID-19, occurred in the during-COVID-19, disappeared in the post-COVID-19 and did not occur during the Russia-Ukraine conflict. Robustness checks confirm our finding that herding manifested in the during-COVID-19 period. Additionally, no difference exists between bearish and bullish or high-and low-volatility days, pushing aside the asymmetry in the investors' responses. This study may raise investors' awareness of their cognitive bias's influence on their decisions, improving market efficiency by increasing the rationality of investors' decisions.

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