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Engineering of efficient visible light photocatalysts:Ti_(1-x+y)cu_(x)La_(y)O_(2)(x=0.03;y=0,0.005,0.01) compositions

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Journal of Rare Earths 2024年第3期42卷 497-505,I0003页

作者： S.m.Yakout A.m.Youssef Inorganic chemistry Department National Research Centre(NRC)El Buhouth StDokkiCairo12622Egypt

In dye-photocatalysis, widening the wavelengths absorption range of catalysts as well as aborting the recombination of the photoexcited charge carriers(electrons-holes pairs) are of paramount *** the current study, we report the photocatalytic characteristics of four compositions composed of TiO_(2),Ti_(0.97)cu_(0.03)O_(2), Ti_(0.965)cu_(0.03)La_(0.005)O_(2)and Ti_(0.96)cu_(0.03)La_(0.01)O_(2)powders for two harmful dyes(congo red and methylene blue). The X-ray diffraction technique verified the configuration of mixed anatase and rutile phases in pure TiO_(2)and Ti_(0.97)cu_(0.03)O_(2)powders while Ti_(0.965)cu_(0.03)La_(0.005)O_(2)and Ti_(0.96)cu_(0.03)La_(0.01)O_(2)powders possess anatase phase only. The changes of the band gap structure and dimensions of the unit cell volume of TiO_(2)confirm the substitution of Ti^(4+)sites by cu^(2+)and La^(3+)ions. Remarkable widening of wavelengths absorption with formation of long absorption tails were found in TiO_(2)(3.13 e V) through insertion of La^(3+)plus cu^(2+)ions. Ti_(0.965)cu_(0.03)La_(0.005)O_(2)and Ti_(0.96)cu_(0.03)La_(0.01)O_(2)samples exhibit a visible light band gap of 2.3 and 2.7 e V, respectively. Based on SEm images, incorporation of cu^(2+)and La^(3+)ions influences the surface morphology of TiO_(2). The resulting Ti_(0.97)cu_(0.03)O_(2), Ti_(0.965)cu_(0.03)La_(0.005)O_(2)and Ti_(0.96)cu_(0.03)La_(0.01)O_(2)powders present enhanced photocatalytic activity towards congo red dye degradation compared to pure one under natural solar spectrum. The best Ti_(0.96)cu_(0.03)La_(0.01)O_(2)catalyst exhibits superior photocatalytic activity of 96% for 10 ppm cR dye in 20 min as well as above average photocatalytic efficiency of 63% for 30 ppm cR dye in 120 min. As well, it showed acceptable photodegradation activity of 52% for 30 ppm mB solution in 140 min of sunlight irradiation. The heightened photodegradation efficiency of Ti_(0.96)cu_(0.03)La_(0.01)O_(2)catalyst can be clarified in terms of higher ch

关键词： Semiconductor TiO_(2) Rare earths congo red methylene blue Solar spectrum Photodegradation

A toast to a zebrafish germ cell induction cocktail

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Science china(Life Sciences) 2024年第6期67卷 1314-1315页

作者： mary c.mullins Department of cell and Developmental Biology University of Pennsylvania Perelman School of MedicinePhiladelphia 19104USA

The zebrafish field is ringing in the new year with a publication from Yonghua Sun's laboratory(Wang et al.,2023)of a cocktail of germline factors that can induce all cells of the zebrafish embryo into primordial germ cells(PGcs)at phenomenal *** major advance is not only of great interest to germ cell biologists,but it has important applications to the entire zebrafish field,as shown in Wang et al.(2023).

关键词： fish zebra field

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mid-term survival of the Optimys short stem: A prospective case series of 500 patients

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World Journal of Orthopedics 2024年第3期15卷 257-265页

作者： Bryan Hamans Sheryl de Waard Sjoerd Kaarsemaker Esther R c Janssen Inger N Sierevelt Gino m m J Kerkhoffs Daniël Haverkamp Department of Orthopaedic Surgery Xpert ClinicAmsterdam 1101EANetherlands Department of Orthopedic Surgery Amsterdam University Medical CenterAmsterdam 1105 AZNetherlands Esther R c Janssen Department of Orthopaedic SurgeryViecuri Medisch CentrumVenlo 5912 BLNetherlands centre for Orthopaedic Research Spaarne ZiekenhuisHoofddorp 2134 TMNetherlands Department of Orthopaedic Surgery and Sports medicine Amsterdam UMC-Location AMCAmsterdam 1105 AZNetherlands Department of Orthopedic Surgery Xpert Orthopedic Surgery ClinicAmsterdam 1101 EANetherlands

BAcKGROUND In recent years,there has been an increase in the number of total hip arthroplasty procedures in the younger patient *** active group has higher expectations of their prosthesis in comparison to the older population,and there is a greater physical demand for the *** femoral stems were in-troduced to retain proximal bone stock and joint biomechanics and became more common to implant in this specific ***,the long-term survival and functional outcomes of various short stems are still being investigated in different *** To determine the 5-year survival of the Optimys hip *** This was a prospective multicenter cohort study of 500 patients conducted in two hospitals in the *** patients received the Optimys short stem(mathys Ltd,Bettlach,Switzerland).The primary outcome measure was survival of the hip stem,with revision as the *** secondary outcome measurements included patient-reported outcome measures(PROms).Kaplan-meier analysis was used to calculate the 5-year survival ***-minus-log transformation was performed to calculate the 95%confidence interval(95%cI).mixed model analyses were performed to assess the course of the PROms during the 1st 2 years after *** were modeled separately for the 1st and 2nd years to calculate the yearly change in PROms during both follow-up periods with accompanying 95%*** The mean age of the total 500 patients was 62.3 years(standard deviation:10.6)and 202 were male(40%).At a median follow-up of 5.5 years(interquartile range:4.5-6.7),7 patients were deceased and 6 revisions were registered,for infection(n=3),subsidence(n=2)and malposition(n=1).This resulted in an overall 5-year survival of 98.8%(95%cI:97.3-99.5).If infection was left out as reason for revision,a stem survival of 99.4%(95%cI:98.1-99.8)was *** questionnaires were completed by 471 patients(94%),317 patients(63%)completed the 1-year follow-up questionna

关键词： Total hip arthroplasty Femoral stem Short stem Optimys Survival 5-year survival Revision PROms

Language Assessment Feedback Towards Pedagogical conversational Agent

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Sino-US English Teaching 2024年第5期21卷 201-216页

作者： Bhagya Prabhashini c m.Latha Jazan University JazanK.S.A. K.L.E.F. Andhra PradeshIndia

continuous development of technology provides an opportunity to incorporate feedback in online *** mode of online instruction during the pandemic was the most significant survival *** enabled every teacher and student to enter a virtual classroom to make sense of *** is part of language instruction and is a powerful key to improving students’learning *** plays an influential and crucial role in teaching and *** is an invaluable,ultimate learning tool for learners that aids them in not committing the same error again and creates ***,knowing about formative exam feedback is students’right because quality feedback allures *** students’eagerness,providing feedback is considered a good practice to be followed by all the teaching *** of online feedback,the present study attempts to study how pedagogical agents provide online feedback in language *** study also considers the characteristics of pedagogical conversational agents that are suitable for providing feedback in online language *** put,the study encapsulates that screen agents play an essential role in students’motivation and acceptability of learning through feedback.

关键词： feedback learning performance online language assessment pedagogical conversational agents

功能磁共振评估宫内发育迟缓仔鼠肾脏微观结构及灌注改变

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中国当代儿科杂志 2024年第3期26卷 289-296页

作者：梁灿李莹贺晓日中南大学湘雅二医院新生儿科中南大学湘雅二医院新生儿疾病研究室湖南长沙410011

目的探讨体素内不相干运动(intravoxel incoherent motion,IVIm)、纵向弛豫时间定量成像(T1 mapping)、横向弛豫时间定量成像(T2 mapping)等功能磁共振成像技术评估宫内发育迟缓(intrauterine growth restriction,IUGR)仔鼠的肾脏微观结构及灌注改变的价值。方法通过孕期低蛋白饮食法建立IUGR仔鼠模型。低蛋白饮食孕鼠所产仔鼠随机分为IUGR8周组、IUGR12周组,正常饮食孕鼠所产仔鼠随机分为正常8周组、正常12周组,各组n=8。比较各组仔鼠肾脏皮质、髓质的表观弥散系数(apparent diffusion coefficient,ADc)、真实扩散系数(D_(t))、伪扩散系数(D*)、灌注分数(f)、T1值、T2值,以及血肌酐、血尿素氮水平。结果IUGR 12周组肾脏髓质Dt值高于IUGR 8周组,IUGR 12周组肾脏髓质D*值低于正常12周组与IUGR 8周组(P0.05)。各组血肌酐及血尿素氮含量比较差异无统计学意义(P>0.05)。IUGR 8周组仔鼠肾脏可见肾小球增生肥大,未见明显纤维化改变;IUGR 12周组仔鼠肾脏可见肾小球萎缩,囊腔狭窄,间质出现炎性细胞浸润及纤维化。结论IVIm磁共振成像可用于评估及动态观察IUGR仔鼠肾脏微观结构及灌注损伤,T1 mapping磁共振成像可用于评估IUGR仔鼠肾脏损伤,T1 mapping联合T2 mapping磁共振成像可进一步分辨IUGR仔鼠的肾脏纤维化。

关键词：宫内发育迟缓肾脏体素内不相关运动纵向弛豫时间定量成像横向弛豫时间定量成像功能磁共振大鼠

Free vibration and buckling analysis of polymeric composite beams reinforced by functionally graded bamboo fbers

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Applied mathematics and mechanics(English Edition) 2024年第3期45卷 543-562页

作者： H.m.FEIZABAD m.H.YAS Department of mechanical Engineering Razi UniversityKermanshah ***Iran

Natural fibers have been extensively researched as reinforcement materials in polymers on account of their environmental and economic advantages in comparison with synthetic fibers in the recent *** fibers are renowned for their good mechanical properties,abundance,and short cycle *** beams are one of the fundamental structural components and are susceptible to mechanical loads in engineering applications,this paper performs a study on the free vibration and buckling responses of bamboo fiber reinforced composite(BFRc)beams on the elastic *** different functionally graded(FG)layouts and a uniform one are the considered distributions for unidirectional long bamboo fibers across the *** elastic properties of the composite are determined with the law of *** Hamilton’s principle,the governing equations of motion are *** generalized differential quadrature method(GDQm)is then applied to the equations to obtain the *** achieved outcomes exhibit that the natural frequency and buckling load values vary as the fiber volume fractions and distributions,elastic foundation stiffness values,and boundary conditions(Bcs)and slenderness ratio of the beam ***,a comparative study is conducted between the derived analysis outcomes for BFRc and homogenous polymer beams to examine the effectiveness of bamboo fibers as reinforcement materials,demonstrating the significant enhancements in both vibration and buckling responses,with the exception of natural frequencies for cantilever beams on the Pasternak foundation with the FG-◇fiber ***,the obtained analysis results of BFRc beams are also compared with those for carbon nanotube reinforced composite(cNTRc)beams found in the literature,indicating that the buckling loads and natural frequencies of BFRc beams are lower than those of cNTRc beams.

关键词： bamboo fiber free vibration buckling analysis functionally graded(FG)beam elastic foundation generalized differential quadrature method(GDQm)

Nonlinear dynamic modeling of planar moving Timoshenko beam considering non-rigid non-elastic axial effects

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Applied mathematics and mechanics(English Edition) 2024年第3期45卷 479-496页

作者： m.ABBASI GAVAri m.R.HOmAEINEZHAD Faculty of mechanical Engineering K.N.Toosi University of TechnologyTehran 19991-43344Iran

Due to the importance of vibration effects on the functional accuracy of mechanical systems,this research aims to develop a precise model of a nonlinearly vibrating single-link mobile flexible *** manipulator consists of an elastic arm,a rotary motor,and a rigid carrier,and undergoes general in-plane rigid body motion along with elastic transverse *** accurately model the elastic behavior,Timoshenko’s beam theory is used to describe the flexible arm,which accounts for rotary inertia and shear deformation *** applying Newton’s second law,the nonlinear governing equations of motion for the manipulator are derived as a coupled system of ordinary differential equations(ODEs)and partial differential equations(PDEs).Then,the assumed mode method(Amm)is used to solve this nonlinear system of governing equations with appropriate shape *** assumed modes can be obtained after solving the characteristic equation of a Timoshenko beam with clamped boundary conditions at one end and an attached mass/inertia at the *** addition,the effect of the transverse vibration of the inextensible arm on its axial behavior is *** the axial rigidity,the effect makes the rigid body dynamics invalid for the axial behavior of the ***,numerical simulations are conducted to evaluate the performance of the developed model,and the results are compared with those obtained by the finite element *** comparison confirms the validity of the proposed dynamic model for the *** to the mentioned features,this model can be reliable for investigating the system’s vibrational behavior and implementing vibration control algorithms.

关键词： planar moving Timoshenko beam non-rigid non-elastic axial effect as-sumed mode method(Amm) nonlinear motion analysis

Physico-chemical and Nutritional Properties of a Food Broth Based on Nere (Parkia biglobosa)

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Food and Nutrition Sciences 2024年第5期15卷 377-389页

作者： Lassana Bamba Gervais melaine m’Boh N’Gbésso Amos Ekissi Kipré Laurent Séri Gnogbo Alexis Bahi Koffi Pierre Valery Niaba Allico Joseph Djaman Grah Avit maxwell Beugre Laboratory of Agro-Valorization Department of Agroforesterie Jean Lorougnon Gu&#233d&#233 University Daloa C&#244te d&#8217Ivoire medical and Fundamental Biochemistry Department Institut Pasteur of C&#244te d&#8217Ivoire Abidjan C&#244te d&#8217Ivoire Laboratory of Biotechnology Agriculture and Valorization of Biological Resources Department of Biosciences Felix Houphouet-Boigny University Abidjan Cote d&#8217Ivoire Biology and Health Laboratory Department of Biosciences Felix Houphouet-Boigny University Abidjan C&#244te d&#8217Ivoire

Purpose: Diet and eating habits are major risk factors for the health and the development of disease, such as, for example, metabolic disorder leading to cardiovascular pathology and cancer, decreased immunity exposing to infections. This study of the physico-chemical and nutritional properties of a soumara-based food broth was carried out with the aim of promoting the consumption of organic broth made from nere seeds (soumara). That is to alleviate certain metabolic diseases, which is a matter of food safety, and also to limit the risk for the health about the consumption of some cooking stocks on the market. methods: Several natural ingredients such as nere seeds (soumara), ginger, black pepper, parsley and garlic were used to create a nere-based stock. All these ingredients were freeze-dried and the powder obtained was used to make the broth, regarding their physical and chemical properties. Results: The broth had a good protein content of 17.41 ± 0.367 g/100g, a lipid content of 16.80 ± 0.08 g/100g and a fiber content of 8.66 ± 0.04 g/100g. In terms of nutritional values, the broth showed good levels of calcium 184.21 ± 0.09 mg/100g, potassium 50.04 ± 1.45 mg/100g and iron and zinc. In terms of antioxidant activity, the broth also showed good antioxidant activity. conclusion: Regarding the properties of our food broth, whose composition is based on natural ingredients, could be recommended for consumption and, its properties, could play an important role in preventing and combating certain metabolic diseases.

关键词： Food Broth Nere Physico-chemical Properties Nutrition Food Safety

Recent advances on bismuth oxyhalides for photocatalytic cO_(2)reduction

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Journal of Environmental Sciences 2024年第6期140卷 183-203页

作者： Liangpang Xu Jimmy c.Yu Ying Wang Department of chemistry The Chinese University of Hong KongShatinNew TerritoriesHong Kong 999077China

Photocatalytic conversion of cO_(2)into fuels such as cO,cH_(4),and cH_(3)OH,is a promising approach for achieving carbon *** oxyhalides(BiOX,where X=cl,Br,and I)are appropriate photocatalysts for this purpose due to the merits of visible-light-active,efficient charge separation,and easy-to-modify crystal structure and surface *** practical applications,multiple strategies have been proposed to develop high-efficiency BiOX-based *** review summarizes the development of different approaches to prepare BiOX-based photocatalysts for efficient cO_(2)*** the review,the fundamentals of photocatalytic cO_(2)reduction are ***,several widely used modification methods for BiOX photocatalysts are systematacially discussed,including heterojunction construction,introducing oxygen vacancies(OVs),Bi-enrichment,heteroatom-doping,and morphology ***,the challenges and prospects in the design of future BiOX-based photocatalysis for efficient cO_(2)reduction are examined.

关键词： Bismuth oxyhalides Photocatalysis cO_(2)reduction modification methods