bluuebunny/crossref_metadata_2025_split huggingface dataset:
Knowledge, Attitude, and Practice of Blood Donation among Undergraduate Students in Enugu, Nigeria: A Cross Sectional Study
Authors: Aniebo Chioma Lynda , Ani Deborah Ifechukwu , Aneke Miracle Amobi , Amoke Kanayochukwu C. , Onwasigwe Chika N. 
Published: March 2023

Background: Blood donation is crucial in saving lives, as blood cannot be manufactured artificially and can thus be obtained only from human blood sources. Voluntary blood donation is the cornerstone of a safe and adequate supply of blood and blood components. We aim to understand the level of knowledge, attitude, and practice of blood donation and associated factors among undergraduate students in Nigeria.
Method: We conducted a cross-sectional descriptive study among 300 undergraduate students at Enugu State University College of Medicine Parklane, Enugu, Nigeria in June 2022 to access their knowledge, attitude, and practice of blood donation. Data were analyzed using multivariable logistics regression to identify factors associated with blood donation practice.
Results: Most of the students had good knowledge of blood donation, and it was revealed that the initial source of information was mostly from school (37.7%), 89.0% of participants knew their blood group, and 98.3% were aware of infections through blood donation. Also, the attitude of our respondents towards blood donation revealed that the majority (95.0%) agreed blood donation saves lives, that blood donation is good (91.0%), and that voluntary blood donation (84.7%) is the best source of donor blood; most were indifferent to paid donation. Regression analysis suggests that knowing own blood group, having a positive attitude towards blood donation, and being willing to donate in the future were significantly associated with blood donation practice.
Conclusion: Hence, there is a need for adequate enlightenment campaigns and health education on the need for voluntary blood donation to improve knowledge of, change attitudes towards voluntary blood donation, and ultimately encourage undergraduate students in developing countries to donate blood.
Numerical Modeling of the Effect of the Ratio of Thermal Conductivity on the Thin Film Condensation in Forced Convection in a Canal Whose Walls are Covered with a Porous Material
Authors: Ndiaye Pape Tamsir , Thiam Omar Ngor , Ndiaye Momath , Ndiaye Goumbo , Sow Mamadou Lamine , Mbow Cheikh 
Published: March 2023

A numerical modeling of the effect of the ratio of thermal conductivity on the thin film condensation in forced convection in a canal whose walls are covered with a porous material is presented. In this work, the generalized Darcy-Brinkman-Forchheimer (DBF) equations in the porous medium and the hydrodynamic and thermal boundary layer equations in the pure liquid, were used.
Rendered dimensionless and homotopically transformed into a new rectangular basis, we used a finite difference method to discretize them. The advection and the diffusion terms are discretized with respectively a backward-centered scheme and a centered scheme.
After validation, we find that a variation of the longitudinal velocity as a function of the ratio of thermal conductivity only for low values of the Peclet number. When the ratio of thermal conductivity increases, corresponding to an increasingly conductive medium, the longitudinal velocity, the temperature and the Nusselt number increase (even when the Peclet number is high for the thermal field). While the thickness of the liquid film decreases (disadvantaged condensation) and leads to an increase in the length of entry, increase almost linear. The sensitivity of condensation to variations in the ratio of thermal conductivity is constant, whatever its value.
The ratio of thermal conductivity is a very decisive and predictable physical quantity to properly examine the performance of condensation.
Graphene‐Like Conjugated Molecule as Hole‐Selective Contact for Operationally Stable Inverted Perovskite Solar Cells and Modules
Authors: Wu Tianhao , Xu Xiushang , Ono Luis K. , Guo Ting , Mariotti Silvia , Ding Chenfeng , Yuan Shuai , Zhang Congyang , Zhang Jiahao , Mitrofanov Kirill , Zhang Qizheng , Raj Saurav , Liu Xiao , Segawa Hiroshi , Ji Penghui , Li Tongtong , Kabe Ryota , Han Liyuan , Narita Akimitsu , Qi Yabing 
Published: March 2023

AbstractFurther enhancing the operational lifetime of inverted‐structure perovskite solar cells (PSCs) is crucial for their commercialization, and the design of hole‐selective contacts at the illumination side plays a key role in operational stability. In this work, the self‐anchoring benzo[rst]pentaphene (SA‐BPP) is developed as a new type of hole‐selective contact toward long‐term operationally stable inverted PSCs. The SA‐BPP molecule with a graphene‐like conjugated structure shows a higher photostability and mobility than that of the frequently‐used triphenylamine and carbazole‐based hole‐selective molecules. Besides, the anchoring groups of SA‐BPP promote the formation of a large‐scale uniform hole contact on ITO substrate and efficiently passivate the perovskite absorbers. Benefiting from these merits, the champion efficiencies of 22.03% for the small‐sized cells and 17.08% for 5 × 5 cm2solar modules on an aperture area of 22.4 cm2are achieved based on this SA‐BPP contact. Also, the SA‐BPP‐based device exhibits promising operational stability, with an efficiency retention of 87.4% after 2000 h continuous operation at the maximum power point under simulated 1‐sun illumination, which indicates an estimatedT80lifetime of 3175 h. This novel design concept of hole‐selective contacts provides a promising strategy for further improving the PSC stability.
Iodine Catalysed Oxidative Cross‐Coupling of Thioureas and Amines without Desulfurization
Authors: Serrao Lavina Gladis , Rai P. Vishakha , Periyasamy Ganga , Maddani Mahagundappa Rachappa 
Published: March 2023

AbstractIodine/tert‐butyl hydroperoxide (TBHP) mediated synthesis of sulfenamides via oxidative cross‐coupling of thioureas and amines without desulfurization is developed. Diversely substituted sulfenamides have been synthesized in moderate to good yields in short reaction time. The present strategy is further explored for the synthesis of functionalized thiazole derivatives. DFT studies and mechanistic investigations indicate that the current coupling reaction proceeds via radical pathway.
Comproportionation of CO2 and Cellulose to Formate Using a Floating Semiconductor‐Enzyme Photoreforming Catalyst
Authors: Lam Erwin , Miller Melanie , Linley Stuart , Manuel Rita R. , Pereira Inês A. C. , Reisner Erwin 
Published: March 2023

AbstractFormate production via both CO2 reduction and cellulose oxidation in a solar‐driven process is achieved by a semi‐artificial biohybrid photocatalyst consisting of immobilized formate dehydrogenase on titanium dioxide (TiO2|FDH) producing up to 1.16±0.04 mmolformate g
−1 in 24 hours at 30 °C and 101 kPa under anaerobic conditions. Isotopic labeling experiments with 13C‐labeled substrates support the mechanism of stoichiometric formate formation through both redox half‐reactions. TiO2|FDH was further immobilized on hollow glass microspheres to perform more practical floating photoreforming allowing vertical solar light illumination with optimal light exposure of the photocatalyst to real sunlight. Enzymatic cellulose depolymerization coupled to the floating photoreforming catalyst generates 0.36±0.04 mmolformate per m2 irradiation area after 24 hours. This work demonstrates the synergistic solar‐driven valorization of solid and gaseous waste streams using a biohybrid photoreforming catalyst in aqueous solution and will thus provide inspiration for the development of future semi‐artificial waste‐to‐chemical conversion strategies.
Polarisationsabhängige Summenfrequenzspektroskopie (SFG) zur in situ Bestimmung der Nanopartikel‐Morphologie
Authors: Pramhaas Verena , Unterhalt Holger , Freund Hans‐Joachim , Rupprechter Günther 
Published: March 2023

AbstractDie Oberflächenstruktur von Metall‐Nanopartikel auf Oxidträgern lässt sich über charakteristische Schwingungen von adsorbierten Sondenmolekülen wie CO bestimmen. Üblicherweise konzentrieren sich spektroskopische Untersuchungen auf die Peak‐Position und ‐Intensität, die mit der Bindungsgeometrie bzw. der Anzahl der Adsorptionsplätze zusammenhängen. Anhand zweier unterschiedlich präparierter Modellkatalysatoren wird gezeigt, dass die polarisationsabhängige Summenfrequenzspektroskopie (SFG) die gemittelte Oberflächenstruktur und Form von Nanopartikel beleuchten kann. SFG‐Ergebnisse für verschiedene Partikelgrößen und Morphologien werden mit direkter Realraum‐Strukturanalyse mittels TEM und STM verglichen. Die beschriebene Anwendung von SFG kann zur in situ Detektion der Partikelstruktur verwendet werden und könnte ein wertvolles Werkzeug in der operando Katalyse werden.
Highly efficient and facile removal of As(V) from water by using Pb‐MOF with higher stable and fluorescence
Authors: Zhang Chong , Qin Yan , Ke Zhilin , Yin Lili , Xiao Yu , Zhang Shuhua 
Published: March 2023

Metal–organic framework (MOF) materials are promising adsorbents for removing As(V) from sodium arsenate aqueous solutions, because of their high porosity and functional modulability. Two novel Pb(II) complexes {[Pb2(bcabsa)(μ2‐OH)]}n (Pb (bcabsa)) and {[Pb (Hbcabsa)]·(4,4′‐bpy)(H2O)}n (Pb (bcabsabpy)) (H3bcabsa = 4‐(N,N′‐bis(4‐carboxy benzyl)amino)benzene‐sulfonic acid, 4,4′‐bpy = 4,4′‐bipyridine), were hydrothermally synthesized. Pb (bcabsabpy) was characterized by single‐crystal X‐ray diffraction (SC‐XRD), X‐ray photoelectron spectroscopy (XPS), photoluminescence, powder X‐ray diffraction (XRD), and infrared radiation (IR) before and after the adsorption of As(V). In addition, the capacity of Pb (bcabsabpy) to remove arsenic was also investigated. The experimental results showed that Pb (bcabsabpy) had high stability within pH 4–12 and a relatively high As(V) removal rate (>90%) in the pH range of 4–10. The adsorption kinetics followed the pseudo‐second‐order kinetic model, whereas the adsorption isotherm was in agreement with the Langmuir equation. Pb (bcabsabpy) had a high adsorption capacity of As(V) in an aqueous solution (Qmax of 25.51 mg g−1). The fluorescence mechanism of the H3bcabsa, Pb (bcabsa), and Pb (bcabsabpy) are assigned to π‐π*, n‐π*, and π‐π* electron transition processes, respectively.
Numerical simulation of thermo‐solid coupling under the condition of unidirectional heating of underground coal gasification overlying rock
Authors: Xin Lin , Li Jiaze , Niu Maofei , Li Chao , Wu Jing , Wang Bowei , Xu Weihao , Feng Mingze , Ma Yan 
Published: March 2023

AbstractIn order to study the variation law of temperature and stress of overlying rock under the thermal solid coupling condition of underground coal gasification (UCG), the coal measure sandstone samples were heated in one direction, the variation law of temperature and thermal stress was analyzed, and the experiment was analyzed using the numerical simulation software COMSOL. The temperature field, stress field, and volume strain distribution of rock mass are obtained. The results show that in the heating stage of the heating plate, the temperature curve of each measuring point changes rapidly and the temperature rises rapidly, and due to the decrease of the heating rate of the heating plate, the change rate of thermal stress tends to decrease. In the circumferential region of the lower end face, stress stretching occurs and the radial strain is the largest. Under the constraint of unidirectional heating, the temperature distribution of rock along the height direction is obvious. The principal stress is mainly concentrated near the lower end face of the specimen. The research results are helpful to study the thermal damage and fracture characteristics of overlying sandstone of UCG from the perspective of thermal solid coupling.
Process improvement and heat integration of rich gas ethane recovery
Authors: Jiang Hong , Gao Peng , Yang Tonglin 
Published: March 2023

AbstractThe recovery of ethane from natural gas is an important measure to enhance the economic benefit and energy saving of oilfields. In the process of condensation, the gas‐rich ethane recovery process has the problems of high condensation, high methane content, difficult control of cold box pinch temperature, and high energy consumption. Based on the Recycle Split Vapor (RSV) process, two improved processes, Supplemental Rectification with Compression and Recycle Split Vapor (SRCR) and Recycle Split Vapor with Liquid Flashing (RSVL), are proposed. Energy consumption analysis shows that RSVL process has the lowest total compression power and lower investment cost than SRCR process. The heat integration analysis shows that the ratios R1 and R2 of the demethanizer side‐draw duty directly influence the temperature matching of the cold and hot streams in the main cold box. For rich gas, R1 is advised to set between .5 and .75, and R2 is advised to set between .6 and .8. The sensitivity analysis shows that the lower the feed gas pressure and the richer the gas, the higher the total compression power of the process, and the closer the composite curve of cold and heat in the main cold box. The higher the feed gas temperature, the greater the total compression power. The higher the CO2 content in the feed gas, the higher the total compression power of the RSVL process, and the smaller the CO2 freezing temperature in the demethanizer.
Assessment of metabolic stability and pharmacokinetics by LC–MS/MS and establishment of the safe dose of IMID‐2, a novel anticancer molecule under drug discovery
Authors: Kumar S. Pranush , Jadav Tarang , Sahu Amit Kumar , Ghosh Chowdhary Moumita , Siwach Ankit , Patel Harit , Patel Sagarkumar , Rajput Niraj , Shard Amit , Khairnar Amit , Sengupta Pinaki 
Published: March 2023

AbstractPyruvate kinase (PK) M2 activators ramp up glycolysis in cancer cells, leading to a reversal of the Warburg effect in cancer cells. A promising PKM2 activator molecule, IMID‐2, developed by the National Institute of Pharmaceutical Education and Research—Ahmedabad showed promising anticancer activity against MCF‐7 and COLO‐205 cell lines, which represent breast and colon cancer. Its physicochemical properties, like solubility, ionization constant, partition coefficient and distribution constant, have already been established. Its metabolic pathway is also well established throughin vitroandin vivometabolite profiling and reported previously. In this study, we have evaluated the metabolic stability of IMID‐2 using LC–MS/MS and investigated the safety aspect of the molecule through an acute oral toxicity study.In vivostudies in rats confirmed that the molecule is safe even at a dose level of 175 mg/kg. Furthermore, a pharmacokinetic study of IMID‐2 was also carried out using LC–MS/MS to understand its absorption, distribution, metabolism, and excretion profile. The molecule was found to have promising bioavailability through the oral route. This research work is thus another step in the drug testing of this promising anticancer molecule. The molecule can be considered to be a potential anticancer lead based on the earlier report substantiated by current findings.
Endovascular repair using parallel grafts to treat a suprarenal pancreatitis‐related abdominal aortic pseudoaneurysm
Authors: Zacà Sergio , Patruno Isabella , Pulli Raffaele , Angiletta Domenico 
Published: March 2023

AbstractArterial pseudoaneurysms represent an uncommon complication of acute pancreatic inflammation or chronic pancreatitis. We describe a contained rupture of a suprarenal abdominal aortic pseudoaneurysm. An aorto‐uni‐iliac stent‐graft was adopted as the aortic main body and was combined with two chimneys and two periscope stents for celiac/superior mesenteric artery and renal arteries, respectively. The procedure was complicated by the entrapment of the celiac sheath into the barbs of the aortic stent‐graft and the attempts to remove the sheath resulted in an upward migration of the stent‐grafts. A bail‐out endovascular procedure was used to reline the stent‐grafts and the pseudoaneurysmal sac was embolized with coils.
Nivolumab‐induced acute tubular injury: A case report
Authors: Yang Hui‐Hsin , Chang Chia‐Wen , Chen Tai‐Di 
Published: March 2023

AbstractNivolumab belongs to immune checkpoint inhibitors (ICIs). ICIs‐induced kidney injury is rare and acute interstitial nephritis (AIN) is the majority. A 58‐year‐old woman had gastric cancer treated with nivolumab. Her serum creatinine (Cr) increased to 5.94 mg/dL post 2 cycles of nivolumab and co‐administered with acemetacin. A kidney biopsy showed acute tubular injury (ATI). Nivolumab rechallenge was done and Cr worsened again. The lymphocyte transformation test (LTT) indicated a strong positive for nivolumab. Although rare, ATI due to ICIs could not be ruled out, and LTT is a tool to identify the culprit.
Life‐threatening airway obstruction due to retropharyngeal and cervicomediastinal hematomas following transjugular intrahepatic portosystemic shunt procedure for acute variceal bleeding in cirrhosis.
Authors: Li Long , Chen Yong 
Published: March 2023

AbstractWe report a case of life‐threatening airway obstruction due to retropharyngeal‐cervicomediastinal hematomas following transjugular intrahepatic portosystemic shunt or acute variceal bleeding in cirrhosis. Even though this is a rare complication, clinicians should maintain a high index of suspicion and evaluate and treat it promptly to prevent a fatal outcome.
Heinz body hemolysis following extended use phenazopyridine in a post‐HCT patient with hemorrhagic cystitis: An old problem for a new generation
Authors: Ferdjallah Asmaa , Long Susie , Dayton Vanessa , Gupta Ashish O. 
Published: March 2023

AbstractHemorrhagic cystitis is a common complication following the use of cyclophosphamide. Associated dysuria can be painful and there are few good options to relieve pain. Phenazopyridine has historically been utilized for dysuria and is available over the counter. However, it is associated with hematologic side effects with prolonged use. Here we present a case of a patient who developed Heinz body hemolysis following prolonged administration of phenazopyridine to treat cyclophosphamide‐induced hemorrhagic cystitis following hematopoietic stem cell transplant.
A rare multiple myeloma complication as a spinal cord metastasis: A case report
Authors: Mansour Marah , Haider Zeinab , Al Khiami Lin , Sioufi Mohammad Saleem Talal , Takieddin Asmaa , Al Shamat Aiman Abo , Alwaw Ricarda , Musleh Mais 
Published: March 2023

AbstractMultiple myeloma is a hematological cancer mostly located in the marrow of the vertebrae, pelvis, and thighs. Although the presence of extramedullary disease in the central nervous system is rare, herein, we report a complicated case of multiple myeloma in the spinal cord.
Takotsubo (stress) cardiomyopathy induced by acute asthma exacerbation in elderly woman
Authors: Al Khodari Khaled , Alhaj Tahtouh Raad , Abdullatef Waleed K. , Al Khodari Mouaz 
Published: March 2023

AbstractA 73‐year‐old patient who was admitted secondary to acute asthma exacerbation that required frequent salbutamol and adrenaline nebulization. Takotsubo cardiomyopathy (TTC) was diagnosed after the new onset of chest pain with modest troponin elevation and normal coronary angiogram. Low ejection fraction and apical akinesia were completely resolved after her symptoms got improved.
Cavernous sinus thrombosis in ulcerative colitis recurrent after pregnancy: A case report
Authors: Akhoundizardini Sepideh , Jafarshad Reyhaneh , Taftian Azadeh , Nirouei Matineh , Mahboubipour Hamid , Farahani Masoumeh 
Published: March 2023

AbstractInflammatory bowel disease and pregnancy are risk factors for increased hyper coagulopathy state. A 35‐year‐old woman with ulcerative colitis was presented in this study. She had the recurrence of the disease during pregnancy. She suffered cavernous sinus thrombosis simultaneously.
Periodic Mesoporous Organosilica Nanomaterials with Unconventional Structures and Properties
Authors: Vafaeezadeh Majid , Thiel Werner R. 
Published: March 2023

AbstractPeriodic mesoporous organosilicas (PMOs) are high surface area organic‐inorganic hybrid nanomaterials that have found broad applications in various fields of research such as in (bio)chemistry or material science. By choosing suitable organic groups in the framework of these materials, their surface properties such as polarity, optical/electrical characteristics and adsorption capacity can be tuned. This critical review provides an overview of the current state of the art in the developments and applications of some PMO nanomaterials in diverse fields of research. This is placed in the context of four leading areas of PMO nanomaterials, including chiral PMOs, plugged PMO nanomaterials, Janus PMOs and PMO‐based nanomotors. The review briefly discusses the recent and key findings on these PMO nanomaterials as well as their potential applications for future developments.
Peracid Oxidation of Unactivated sp3 C−H Bonds: An Important Solvent Effect
Authors: Maciuk Sergej , Wood Susanna H. , Patel Vipulkumar K. , Shapland Peter D. P. , Tomkinson Nicholas C. O. 
Published: March 2023

AbstractThe peracid oxidation of hydrocarbons in chlorinated solvents is a low yielding and poorly selective process. Through a combination of DFT calculations, spectroscopic studies, and kinetic measurement it is shown that the origin of this is electronic in nature and can be influenced through the addition of hydrogen bond donors (HBD) and hydrogen bond acceptors (HBA). Performing the reaction of a cycloalkane with mCPBA in a fluorinated alcohol solvent such as nonafluoro‐tert‐butanol (NFTB) or hexafluoroisopropanol (HFIP), which act as strong HBD and poor HBA, leads to significantly higher yields and selectivities being observed for the alcohol product. Application of the optimised reaction conditions allows for the selective oxidation of both cyclic and linear alkane substrates delivering the corresponding alcohol in up to 86 % yield. The transformation shows selectivity for tertiary centres over secondary centres and the oxidation of secondary centres is strongly influenced by stereoelectronic effects. Primary centres are not oxidised by this method. A simple computational model developed to understand this transformation provides a powerful tool to reliably predict the influence of substitution and functionality on reaction outcome.
Efficient K‐Storage of Fe‐Coupled Organic Molecule Anode in Ether‐Based Electrolytes
Authors: Shen Nailu , Chen Ningning , Lai Qingxue , Pang Yinshuang , Sheng Yi , Chen Hong , Zhang Wanying , Zheng Jing , Liang Yanyu 
Published: March 2023

AbstractGiven these advantages of widely designable structures and environmentally friendly characteristics, organic electrode materials (OEMs) are considered to be promising electrode materials for alkaline metal‐ion batteries. However, their large‐scale application is hampered by insufficient specific capacity and rate performance. Here, Fe2+ is coupled to the anhydride molecule NTCDA to form a novel K‐storage anode Fe‐NTCDA. In this way, the working potential of Fe‐NTCDA anode is reduced, which makes it more suitable to be used as an anode material. Meanwhile, the electrochemical performance is significantly improved due to the increase in K‐storage sites. Moreover, electrolytes regulation is implemented to optimize the K‐storage behavior, resulting into a high specific capacity of 167 mAh/g after 100 cycles at 50 mA/g and 114 mAh/g even at 500 mA/g in the 3 M KFSI/DME electrolytes.