bluuebunny/crossref_metadata_2025_split huggingface dataset:
Synthesis and structural studies on zinc(II) macrocyclic and hetrocyclic complexes derived from schiff base and mixed ligands of 1,4-dihydroquinoxaline-2,3-dione, orthophenylene diamine and hydroquinone
Authors: Lemecha Gemechu , Taye Asmamw , Getachew Negash 
Published: October 2024

In this study two new zinc(II) complexes involving oxygen and nitrogen donor sequences derived from 1,4-dihydroquinoxaline-2,3-dione (QXD), o-phenylenediamine (OPD) and hydroquinone (HQ) were synthesized through a template procedure. The structural elucidation of these complexes was carried out using measurement of molar conductance in 1x10-3 M solution of DMSO and various spectral techniques; 1H and 13C NMR, FT-IR, UV-VIS and AAS. The results showed that the zinc(II) ion coordinates with the Schiff base ligands in octahedral geometry, leading to the formation of stable macrocyclic and heterocyclic structures. The cyclic ligand (L) was found to coordinate as NNNN donor, through four imine nitrogen atoms which were formed up on condensation of the –NH2 groups on o-phenylenediamine with C=O group on quinoxaline dione in a 2:2 mole ratio, in the presence of one mole equivalent of ZnCl2 in ethanol medium. It also indicates the formation of a new mixed ligand zinc(II) complex with an OO OO O O coordination around zinc(II). The study contributes to the understanding of the coordination chemistry of zinc(II) with Schiff bases and provides insights into the development of novel zinc-based complex compounds.
KEY WORDS: Macrocyclic and mixed ligand, 1,4-Dihydroquinoxaline-2,3-dione, o-Phenylenediamine, Hydroquinone
Bull. Chem. Soc. Ethiop. 2025, 39(1), 49-64.
DOI: https://dx.doi.org/10.4314/bcse.v39i1.4
Biological activity of azo quinoline dye and its palladium(II) complex
Authors: Din Kadhoum Alzamili Saif , Shamran Mohammed Hasan , Mothhar Muslim Taif 
Published: October 2024

Azo dye derived from 8-hydroxyquinoline and 3-aminopyridine namely (E)-5-(pyridin-3-yldiazenyl)quinolin-8-ol (PQ8OL) and its palladium complex were prepared and was characterized by H-NMR, UV-Vis, and mass spectroscopies. The value of conductivity indicates that the palladium complex is non-ionic. The structure of PQ8OL dye has been solved from powder X-Ray by using Material Studio. The structure has been indicated to hydrazone form of PQ8OL dye. The PQ8OL has coordinated via nitrogen and oxygen atoms of quinoline. The UV-Vis transitions indicated that the palladium complex is square planer. The palladium complex appeared biological activity more than PQ8OL ligand. The prepared compounds appeared potential biological activity in the range of 0.6-2.0 mm against Staphylococcus aureus and E. coli bacteria. The PQ8OL ligand and its palladium complex showed potential inhibition where the inhibition was 1.0 and 6.0 mm for PQ8OL ligand and palladium complex respectively against Staphylococcus aureus. The inhibition for E. coli, by the ligand and its palladium complex was 2.0, and 7.0 mm, respectively.
KEY WORDS: Biological activity, Palladium(II) complex, Quinoline, Crystal, Pyridine
Bull. Chem. Soc. Ethiop. 2025, 39(1), 91-100.
DOI: https://dx.doi.org/10.4314/bcse.v39i1.7
Vaccine Quality Challenges in Secretly Traded H5 and H9 Avian Influenza Vaccines in Nigeria
Authors: Oluwadare Franklyn Ayomide , Mkpuma Nicodemus , Killo Ally Omary , Inuwa Bitrus , Fagbohun Olusegun , Meseko Clement Adebajo 
Published: October 2024

Avian Influenza Virus (AIV) especially the highly pathogenic subtype H5Nx causes Avian Influenza (AI) disease and it is a major threat to the poultry industry and public health worldwide. Vaccination is one of the control measures in many countries, though restricted in Nigeria. As such, some poultry farmers secretly employ imported H5 and H9 AI vaccines to vaccinate their chickens. This study investigated the antigenic quality of these imported vaccines. Four imported vaccine brands were tested using Hemagglutination (HA) test and Reverse Transcriptase Polymerase Chain Reaction (RTPCR). All four vaccine samples tested negative in the HA test, indicating a lack of detectable HA antigen titer. Similarly, RT-PCR failed to amplify the targeted region of the viral matrix gene in any of the vaccine samples against reference control. These negative results are of great concern and suggest that the imported H5 and H9 vaccines lack essential antigens that could stimulate antibodies. Thus, potentially rendering them ineffective against circulating AI subtypes. The failure in antigenic quality could be due to myriads of factors including improper storage, transport (often due to illegal import), or limitations in the original vaccine production process. Regardless of the specific cause, these findings highlight the potential risks associated with the use of unregulated vaccines. Poultry farmers who use these imported vaccines may be incurring unnecessary costs while receiving a false sense of security for their flocks. In conclusion, due to the apparent lack of efficacious antigens, we suggest a quality monitoring of imported H5 and H9 vaccines in Nigeria for compliance with local regulations on vaccine use, biosecurity measures and investigation into the root causes of the vaccine failure observed in this study.
Антропологические воззрения протоиерея Феодора Голубинского
Authors: М.И. Жигалов 
Published: October 2024

Элементы христианской антропологии богословской концепции прот. Феодора Голубинского изложены в его сочинении «Умозрительная психология». В указанном сочинении, о. Феодор отвечает на вопрос о сущности человеческой души, рассматривает жизнь души, касаясь и области мистического опыта. Антропология о. Феодора традиционно строится на догмате о богоподобии человека. Он делит умозрительную психологию на два отделения: 1) о сущности души и ее свойствах: здесь автор говорит свойствах Божиих, которые в ограниченном виде могут быть сообщены человеку как творению Божию; 2) о происхождении души и разных периодах ее существования: о земной и загробной жизни человеческой души.
Elements of Christian anthropology of the theological concept of Archpriest F. A. Golubinsky are set forth in his essay “Speculative Psychology”. In this essay, Father Theodore answers the question about the essence of the human soul, examines the life of the soul, touching the area of mystical experience. The anthropology of F. A. Golubinsky is traditionally based on the dogma of the god-likeness of man. He divides speculative psychology into two sections: 1) about the essence of the soul and its properties: here the author speaks of the properties of God, which in a limited form can be communicated to man as a creation of God; 2) about the origin of the soul and different periods of its existence: about the earthly and afterlife of the human soul.
Отношение к религии воспитанников Морского корпуса Российской империи, поступивших учиться в 1913 г. и окончивших его в 1918 г.
Authors: О.В. Ленских 
Published: October 2024

В статье на основании опубликованных, неопубликованных и архивных материалов рассматриваются причины отказа от религии воспитанников Морского корпуса (училища), поступивших в него в 1913 г. и окончивших в марте 1918 г. Рассмотрев историю домовой церкви корпуса, правила религиозного воспитания, мировые события 1914–1918 гг., возрастной подростковый кризис автор пришел к следующему выводу. Воспитанники, отказавшиеся от веры в Бога и принявшие идеи большевизма, не смогли пройти подростковый кризис и обрести эго-идентичность, то есть, тождественность самому себе, что заставило их поверить в новые революционные идеалы, заменившие им веру в Бога.
Based on published, unpublished and archival materials, the article discusses the reasons for the refusal of religion by pupils of the Naval Corps who entered it in 1913 and graduated in March 1918. Having considered the history of the house church of the corps, the rules of religious education, world events of 1914–1918 years, the age-related adolescent crisis, the author came to the following conclusion. Pupils who refused to believe in God and accepted the ideas of Bolshevism could not go through the teenage crisis and gain ego-identity, that is, identity with themselves, which made them believe in new revolutionary ideals that replaced their faith in God.
Unlocking the Power of Financial Experience: How Risk Perception Shapes Investment Decisions
Authors: Redawati Redawati , Hayat Atma 
Published: October 2024

Research Aims: This study aims to investigate the influence of financial experience on investment decisions, with risk perception acting as an intervening variable among stock investors in Banjarmasin.

Design/methodology/approach: The research employs a Partial Least Squares Structural Equation Modeling (PLS-SEM) approach to analyze the data collected through a survey questionnaire distributed to 122 stock investors in Banjarmasin. This methodology allows for simultaneous analysis of direct and indirect relationships between variables, providing a comprehensive understanding of the dynamics influencing investment decisions.

Research Findings: The findings indicate that financial experience significantly and positively affects investment decisions, suggesting that investors with more extensive financial experience are likely to make more informed and strategic choices. Furthermore, financial experience significantly impacts risk perception, which in turn influences investment decisions, underscoring the crucial role of risk perception as a mediator in this relationship.

Theoretical Contribution/Originality: This study contributes to the behavioral finance literature by elucidating the relationship between financial experience, risk perception, and investment decisions. It highlights the importance of financial literacy and education in enhancing investment decision-making processes, thereby promoting more rational and independent investment choices.
Keywords: Financial experience, investment decisions, risk perception, behavioral finance, PLS-SEM
GASTRANOMIYANING TURIZM RIVOJLANISHIDAGI AHAMIYATI
Authors: Nurullaev Hoshimjon 
Published: October 2024

Gastronomiya turizmda katta boylik hisoblanadi. Bu mamlakatlar madaniyati va an'analarining bir qismi. Yaxshi oshxona hamma uchun qiziqarli, chunki hamma yaxshi va mazali taomni tatib ko'rishni xohlaydi. Ko'p odamlar faqat gastronomik maqsadlarda sayohat qilishadi. Oziq-ovqat insonning asosiy ehtiyojidir va u sayohatga qaror qilishda asosiy turtki bo'lishi mumkin. Shuning uchun tadqiqotda gastronomiya va uning turizmdagi rolini o'rganildi.
Breaking down barriers: creating a community of learning development at the University of St Andrews
Authors: Harris Eilidh , Villegas Paula 
Published: October 2024

This presentation outlined a collaboration that delivered an integrated in-sessional academic and learning development provision for students at the University of St Andrews. Staff from the student learning development team in the Centre for Educational Enhancement and Development, and the Academic English Service, situated in the International Education Institute, partnered to bring previously segregated provisions together for academic year 2023/24.
Historically both units have provided separate in-sessional one-to-one tutorials dictated by students’ first language or stage of study, but with overlap in some skills areas such as writing development. Each service had different parameters in terms of who could access the tutorials and how often they could do so. Due to the restrictions of each provision, and the siloed nature of the services, we identified that students were often not accessing the most appropriate form of tutorial, and that some tutorials were not being used to best effect.
The provision has been reimagined to proffer a new Academic Development Community with the aim of creating a more effective and inclusive resource. This presentation unpicks motivations for pursuing a unified service and reflects on the changes made. The session shared the results of qualitative and quantitative student feedback on the newly aligned provision, and the perceptions of focus group participants on the unified service and relationship with contributing units. Combining the feedback collected thus far with our own professional reflections we explored the outcomes of these changes, as well as the challenges encountered in our collaborative approach. We concluded by sharing the future directions of this collaboration.
Pulmonary aortic endocarditis in patient with patent ductus arteriosus
Authors: Dam Hai Son , Nguyen Cong Huu , Pham Thanh Dat 
Published: October 2024

Introduction: Right-sided heart endocarditis is uncommon, comprising only 5-10% of all infective endocarditis cases. The infective process may be isolated to pulmonary valve or concomitantly involve other valves. Prompt diagnosis by transthoracic echocardiography, aggressive antibiotics from the beginning, and surgical removal of the vegetation for infective endocarditis help prevent the risk of multiorgan failure and fatal pulmonary embolism.
Case summary: A 38-year-old female, the medical history was normal, gave birth naturally at a district hospital 3 months ago. She admitted to the hospital because of fever and continuous shortness of breath 1 month before admission. Echocardiography detected: vegetations (10x23mm) on left pulmonary aortic and patent ductus arteriosus. A CT scan showed a mixed-echo mass in the left pulmonary artery. The patient had surgery to remove the vegetation and close the patent ductus arteriosus. The patient was stable after surgery and discharged 2 weeks after surgery.
Conclusion: Pulmonary aortic vegetations and patent ductus arteriosus are rare lesions and high risk of death. The diagnosis should be considered in any febrile, septic patient with congenital heart disease. Surgery removal of vegetations and aggressive antibiotic treatment should be performed together to improve the outcome.
Comparison of Self-Esteem in Patients Before and after Chemical Skin Peeling: An Interventional Study
Authors: Rasheed Maria , Zulfiqar Sumeera , Bari Ahsan , Zainab Alina 
Published: October 2024

Objective: To evaluate the self-esteem of patients undergoing chemical peeling for therapeutic reasons.
Study Design: Pre-post Observational study.
Place and Duration of Study: Department of Dermatology Combined Military Hospital, Multan Pakistan, from Mar to Aug 2021.
Methodology: Forty-four patients were included in the study. After detailed history and clinical examination, self-esteem of all selected patients meeting the inclusion criteria was determined using RSES (Rosenberg Self-Esteem Score) score. Four sessions of chemical peeling were done using 30% salicylic acid with interval of 2 weeks between each session. (At week 0, 2, 4 and 6) All patients were advised the use of similar sun blocks during the treatment period. Post-peel RSES was re-assessed at 6 weeks.
Results: The pre-peel RSES score (17.95±2.29) improved significantly after the sessions of chemical peeling. The post-peel RSES score was (19.47±1.95). p-value<0.001
Conclusion: Our study showed chemical peeling with 30% salicylic acid caused a significant enhancement of patients’ self- esteem, as significant difference in Rosenberg Self-Esteem Scores was seen before and after chemoexfoliation.
Effects of Variable Doses of Neurokinin B on Hematological and Coagulation Parameters in Adult Male Rats
Authors: Ramzan Faiqah , Atta Tahira , Luqman Muhammad Waqas , Ramzan Muhammad Haris 
Published: October 2024

Objective: To evaluate the dose-dependent effects of Neurokinin B on hematological and coagulation parameters in adult male Sprague Dawley rats.
Study Design: Laboratory-based experimental study
Place and Duration of Study: Gomal University and KMU Institute of Medical Sciences from February 2019 to April 2021.
Methodology: Adult male Sprague Dawley rats (n=5 per group) were administered intraperitoneally with Neurokinin B at doses of 1 µg, 1 ηg and 1 ρg for 12 days consecutively. Control rats received distilled water injections. After 12 days, rats were sacrificed, and blood samples were collected from the left ventricle for hematological and coagulation analysis.
Results: Bleeding time was significantly prolonged in NKB-µg (114±17.10sec) and Neurokinin B -ηg (72±22.25sec) compared to control (33±12.55sec). Clotting time (CT) was also increased (NKB-µg: 111±17.10sec; NKB-ηg: 69±17.10sec, control: 42±12.55sec), as did prothrombin time (PT) [NKB-µg: 93.60±10.92sec; NKB-ηg: 63.40±12.66sec, control: 15±4.12sec] and activated partial thromboplastin time (APTT) [NKB-µg: 94.80±14.04sec; NKB-ηg:68.60±13.74sec, control: 19.40±2.97sec]. Additionally, mean platelet volume [NKB-µg:8.94±0.36fl, control: 8.04±0.48fl] and leukocyte count (×103/µl) [NKB-µg: 12.14±0.69, control: 8.87±1.32] were significantly increased in NKB-treated animals compared to control. There was a significant increase in international normalized ratio in NKB-µg (6.86±0.80) and NKB-ηg (4.65±0.93) compared to control group (1.10±0.30). Conversely, platelet count (×103/µl) was decreased significantly in NKB-µg group (787.80±48.51) compared to the control group (960.60±58.71).
Conclusion: NKB administration led to leukocytosis, thromboctopenia, and affected coagulation pathways with prolonged BT, CT, PT, APTT and INR dose-dependently.
Are Islamic Boarding School Cooperatives (Kopontren) Ready to Digitize? Study using the TRAM approach
Authors: Putri Catur Ayu Lestari  , Ravika Mutiara Savitrah  , Maulida Dwi Agustiningsih  
Published: October 2024

Kopontren (koperasi pesantren) aims to maximize the economic potential of Islamic boarding schools in strengthening the economic empowerment. East Java has the third-highest number of pesantren, with 4.452 pesantren and 323.300 santri. With this amount, Kopontren has the potential to be a partner of UMKM in terms of production, consumption, and promotion, thereby contributing to the expansion of local products. Additionally, around 90.48% of Islamic Boarding School owned business that have self-managed or partnerships with the public. These enterprise units are potentially developed into kopontren. But, the fact that neither conventional nor sharia cooperative can be said to be optimal in carrying out their functions. Cooperatives faced a number of problems, including inadequate finance, a lack of skilled SDMs, failure to fulfill internal supervision criteria, and minimal use of digitalization. This study uses a quantitative approach. The purpose of this study is to analyze user readiness for implementing digitalization using the TRAM model in Kopontren, located in Jember. Because Jember is a district in East Java that has the most pesantren. The findings indicate that perceived usefullness and perceived ease of use influenced of digitalization in Islamic Boarding School Cooperative. Feelings of discomfort, insecurity, the ability to embrace innovation, and optimism have different effects on the perceived user of digitalization in kopontren. This research can be used to help the management of cooperatives, researchers, and governments establish digital systems in cooperatives, especially at Islamic Boarding School
Effects of nonmigrating diurnal tides on the Na layer in the mesosphere and lower thermosphere
Authors: Wu Jianfei , Feng Wuhu , Xue Xianghui , Marsh Daniel Robert , Plane John Maurice Campbell 
Published: October 2024

Abstract. The influence of nonmigrating diurnal tides on Na layer variability in the mesosphere and lower thermosphere regions is investigated for the first time using data from the Optical Spectrograph and InfraRed Imaging System (OSIRIS) on the Odin satellite and Specified Dynamics Whole Atmosphere Community Climate Model (SD-WACCM) with metal chemistry. The Na density from OSIRIS exhibits a clear longitudinal variation indicative of the presence of tidal components. Similar variability is seen in the SD-WACCM result. Analysis shows a significant relationship between the nonmigrating diurnal tides in Na density and the corresponding temperature tidal signal. Below 90 km, the three nonmigrating diurnal tidal components in Na density show a significant positive correlation with the temperature tides. Conversely, the phase mainly indicates a negative correlation above 95 km. Around the metal layer peak, the response of the Na density to a 1 K change in tidal temperature is estimated to be 120 cm−3.
Análise funcional do conector diante disso
Authors: Lopes Monclar Guimarães , Fonseca Carolina Reis 
Published: October 2024

Neste artigo, temos o objetivo de descrever os usos do conector diante disso à luz da Linguística Funcional Centrada no Uso (Rosário, 2022; Traugott; Trousdale, 2013; Bybee, 2010 etc., entre outros), em diálogo com os estudos pragmáticos dos três domínios da conexão (Sweetser, 1990). Ao todo, analisamos cem ocorrências extraídas da base de dados Now, do Corpus do Português, por meio do emprego de análise mista ou quali-quantitativa (Lacerda, 2016). Concluímos que diante disso é um conector polissêmico que pode veicular valores semânticos de conclusão e consequência, distribuídos em uma perspectiva gradiente e organizada com base em aspectos morfossintáticos.
NONUNIVERSITY OF CONSTRAINT RELEASE RELAXATION IN ENTANGLED LINEAR POLYMERS OF VARIOUS CHEMICAL STRUCTURES
Authors: Matsumiya Yumi , Watanabe Hiroshi 
Published: October 2024

ABSTRACT
Extensive experiments have established that constraint release (CR) relaxation takes place in binary blends of chemically identical long and short polymer chains wherein the long chains are dilute and entangled only with the short chains. Recently, Hannecart et al. (Polymers15, 1569 (2023)) focused on polymers of various chemical structures—polystyrene (PS), polyisoprene (PI), polybutadiene, and poly(methyl methacrylate) (PMMA)—and compared the CR relaxation time τL,CR[b] of the long chains in the binary blends of each polymer species. From this comparison, they concluded that a normalized lifetime of the entanglement obstacle, τobstacle/τe = {τL,CR[b]/ZL2}/τe, with ZL = ML/Me (entanglement number of the long chain) and τe being the Rouse relaxation time of the entanglement segment, is determined only by the entanglements number of the short chain, ZS = MS/Me, irrespective of the chemical structure of the chains. This universality (independence from chemistry) would be an important feature if it were unequivocally concluded from experimental data. However, the values of the molecular weights used in their comparison, ML, MS, and Me, should have unavoidably included experimental uncertainties, which disturbs rigid conclusion of the universality. Aiming at a rigid experimental test avoiding those uncertainties, this study focuses just on data of the linear viscoelastic moduli G* of entangled monodisperse polymers of various chemical structures, PS, PI, PMMA, and poly(t-butyl styrene) (PtBS). We were able to find several pairs of chemically different but viscoelastically equivalent monodisperse polymers exhibiting indistinguishable G*/GN data (with GN being the plateau modulus) from the local Rouse relaxation zone to the terminal relaxation zone. For binary blends of those equivalent polymers in each chemical species, that is, long-X/short-X blends with X = PS, PI, PMMA, or PtBS, our experiments revealed that the CR relaxation of the dilute long chain does not complete at the same reduced frequency ωτe even when the chemically different component chains were viscoelastically equivalent in their monodisperse bulk state. It turned out that the CR relaxation is slower in the order of PS (slowest) &lt; PMMA &lt; PI &lt; PtBS (fastest) and that this difference was by a factor of 3–4 in total (well above the experimental resolution limit), rigidly showing the nonuniversal character of CR. An origin of this nonuniversality is briefly discussed within the framework of existing CR models, for example, Graessley’s CR model that already involved a chemistry-dependent parameter z representing a number of local CR hopping sites per entanglement segment.