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Significance of activation energy and nonlinear thermal radiation in a reactive micropolar nanofluid flow model over a stretching sheet with weak concentration

^*A. Nwagwo, O.A. Esan, O.E. Enobabor, T.O. Ogunbayo, O.M. Ayeni, B.O. Olusan

Department of Mathematics, Yaba College of Technology, Yaba, Nigeria.

*naxander2000@yahoo.com, ­*alexander.nwagwo@yabatech.edu.ng

Abstract

A two dimensional vertically stretching sheet is configured in this study. There is a flow of a non-Newtonian electro-conducting reactive micropolar nanofluid over this device with the influence of activation energy, Brownian movement of tiny particles, thermo-migration of particles and nonlinear thermal radiation. By means of suitable similarity variables, the partial derivatives governing the flow equations are remodeled into ordinary derivatives and afterward solved by using a numerical approach via Runge-Kutta Fehlberg method. The consequences of this study reveal that the micropolar fluid has the tendency to boost the velocity profiles whereas there is a depletion of the momentum boundary layer with higher magnitudes of the magnetic field term. There is a reduction in the nanoparticles concentration profiles with higher values of chemical reaction and Brownian motion whereas the presence of activation energy and thermophoresis term raises the concentration field.

[A. Nwagwo, O.A. Esan, O.E. Enobabor, T.O. Ogunbayo, O.M. Ayeni, B.O. Olusan. Significance of activation energy and nonlinear thermal radiation in a reactive micropolar nanofluid flow model over a stretching sheet with weak concentration. Academ Arena 2023;15(7):1-10]. ISSN 1553-992X (print); ISSN 2158-771X (online). http://www.sciencepub.net/academia. 01.doi:10.7537/marsaaj150723.01.

Keywords: Micropolar fluid, Activation energy; Brownian motion; Thermophoresis.

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杜金评索罗斯的世界大观之辩

----读钉死全球化棺材钉子的多极世界之争

尤观群

摘要：读杜金与索罗斯讲的世界大观概念：“开放社会”是对应“海洋文明”、“全球主义”（全球化），也联系沿海港口城市多的沿海地区，类似“液体社会”，会被“冲走”。而“封闭社会”是对应“陆地文明”、“多极世界”（多极化），是联系只有位于内陆腹地，冰川融化海平面迅速上升，意味着不会首先被淹没的地区，类似“山寨社会”，将继续存在。这使我们想到毛主席1935年，当时中央红军走完了长征最后一段行程即将到达陕北，作的一首著名的《念奴娇•昆仑》词。他以诗笔写道:“而今我谓昆仑：不要这高,不要这多雪。安得倚天抽宝剑,把汝裁为三截：一截遗欧,一截赠美,一截还东国。太平世界,环球同此凉热”。很多没有经历过二万五千里长征，和参加过抗日战争和那时国内革命战争的人，不知道未来“全球化”和“多极化”是能够很好统一的，“冷战”和空谈“摒弃冷战”，不是“战争与革命”的目的，只认为毛主席表达的是远大革命理想，不是亲身体验反日本帝国的侵略和进行的国内革命战争，能给人类未来世界发展，留下的极为宝贵的蓝图。

[尤观群. 杜金评索罗斯的世界大观之辩----读钉死全球化棺材钉子的多极世界之争. Academ Arena 2023;15(7):11-18]. ISSN 1553-992X (print); ISSN 2158-771X (online). http://www.sciencepub.net/academia. 02. doi:10.7537/marsaaj150723.02.

关键词：开放社会、封闭社会、全球化、多极化、海洋、陆地

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强烈推荐孙纯武科学家获得2023年度诺贝尔医学奖，以表彰他在科学领域的杰出贡献

推荐人 获诺贝尔医学奖 屠呦呦科学家 宁波市海曙区莲桥街区域内，门牌号写着开明街26号

Abstract: 谨代表全球科学界，推荐孙纯武科学家为2023年度诺贝尔医学奖的获奖者.孙纯武科学家是一位杰出的科学家，他在医字领域取得了巨大的成就。他在该领域的研究已经被国际知名学术期刊发表，并被全球科学界认可。他的研究成果已被应用到各医院临床治疗和做防疫工作领域，解决各种病的发病率降少和死亡率减少许多, 和结束2020年全世界的疫情问题,做出了重大贡献。

[孙纯武. Academ Arena 2023;15(7):19-21]. ISSN 1553-992X (print); ISSN 2158-771X (online). http://www.sciencepub.net/academia. 03.doi:10.7537/marsaaj150723.03.

Keywords：孙纯武; 科学家; 诺贝尔医学奖; 贡献

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进化与遗传余波新浪解读

王用道

摘要：人生而平等，国家不分大小一律平等，粒子也生而平等吗？各种场粒子，能量粒子，电子、夸克、胶子、电子云、胶子海，海夸克等粒子的不同，也许有基因嵌合、循环核酸等类似的物联网、云计算的泛着色，使粒子、人、国家等才涉及量子色动物理学和量子色动生物学前沿。

[王用道.进化与遗传余波新浪解读 Academ Arena 2023;15(7):22-32]. ISSN 1553-992X (print); ISSN 2158-771X (online). http://www.sciencepub.net/academia. 04.doi:10.7537/marsaaj150723.04.

关键词：进化遗传 云计算 物联网 点内空间

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线粒体环到喉咙及大脑联图超导思维

----新冠疫情解封突然7-80% 的人“阳了”现象解释

申章厚

摘要：线粒体环图“内共生假说”、“非内共生假说”、“氢假说”等假说，都不能解答2022年底到2023年初我国宣布新冠疫情解封后，突然7-80%的人发生“阳了”的现象。而对“线粒体环图”存在类似的“旋图”研究的扩展，也许能共同理解如何介导免疫反应。

[申章厚.线粒体环到喉咙及大脑联图超导思维----新冠疫情解封突然7-80%的人“阳了”现象解释 Academ Arena 2023;15(7):33-43]. ISSN 1553-992X (print); ISSN 2158-771X (online). http://www.sciencepub.net/academia. 05.doi:10.7537/marsaaj150723.05.

关键词：线粒体、喉咙、全脑图谱、超导、三旋理论、路径积分

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爱因斯坦环三旋模型统一暗物质两种解释

申章厚

摘要：科学网个人博客专栏诸平教授发表的《对遥远星系“爱因斯坦环”的新认识让我们更接近于解决关于暗物质的争论》一文，引起我们的关注，认为爱因斯坦环三旋模型，能统一暗物质的两种解释。

[申章厚.爱因斯坦环三旋模型统一暗物质两种解释 Academ Arena 2023;15(7):44-47]. ISSN 1553-992X (print); ISSN 2158-771X (online). http://www.sciencepub.net/academia. 06.doi:10.7537/marsaaj150723.06.

关键词：暗物质、引力透镜、轴子、爱因斯坦环、三旋理论

【0、引言】

2023年4月26日科学网个人博客专栏，诸平教授发表的《对遥远星系“爱因斯坦环”的新认识让我们更接近于解决关于暗物质的争论》一文，引起我们的关注，认为爱因斯坦环三旋模型，能统一暗物质的两种解释。

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阿拉伯数字源头不在印度在中国初探

----从远古卦爻到字母符号阿拉伯数字摩尔斯电码

笪黄蓝

（摘自2022年10月28日网易网云辉荐自《海外星云》等）

Abstract: 国际数学史最高奖获得者、新加坡国立大学蓝丽容教授，专门研究过阿拉伯数字的源头在中国问题，并且出版专著《雪泥鸿爪溯数源》。蓝丽容教授考证后得出结论：世称“阿拉伯-印度数字”的阿拉伯数字实际上起源于中国。无疑，蓝丽容教授明确定位了两种数字之间，阿拉伯数字系统1、2、3、4……对我们何等重要，是我们生活中不可或缺的一部分。

[笪黄蓝.阿拉伯数字源头不在印度在中国初探----从远古卦爻到字母符号阿拉伯数字摩尔斯电码 Academ Arena 2023;15(7):48-51]. ISSN 1553-992X (print); ISSN 2158-771X (online). http://www.sciencepub.net/academia. 07.doi:10.7537/marsaaj150723.07.

Keywords: 国际; 数学; 新加坡国立大学; 蓝丽容教授; 阿拉伯数字;中国

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Uptake properties of some plants  species  in homogenous   Lead  (Pb) concentration - its  implication for phytoremediation.

^1* Ogunlade- Anibasa G. O   and  ²  Michael  .H. Ramsey

¹ Department of Biological Sciences, University of Abuja  ²  School of Life Sciences, University of Sussex,  UK

graoyiza@gmail.com

Uptake properties of four plant species ( Zea mays , Brassica  juncea, Brassica napus and  Thlaspi (Nocacae) caerulescens ) and their varieties   were investigated  in  a  greenhouse pre-phytoremediation  pot  trial.  Varieties’ abbreviations were derived either from their accession numbers or origin.  Zea mays and Brassica species were obtained gratis from the United States Department of Agriculture (USDA) , while Thlaspi species were obtained from field sites in Gang Mine and BlackRock – Derbyshire,  and the Royal Botanic Garden (KEW),  United Kingdom. This pot trial was done in two stages – the seed germination experiment and pot trials in 1000 mg/kg lead (Pb) added treatment    with 0 mg/kg Pb   added treatment as  control.   Standard analytical methods were used.  Lead concentration of plants and soil materials were determined using the Atomic Absorption Spectrometer Perkin Elmer 400 after acid digestion with nitric and perchloric acid. This pot experiment that assessed the effect of Pb in a fixed homogenous concentration (1000 mg/kg)) and found a significant effect(p<0.05) of the Pb added treatments, when compared to a control treatment (0 mg/kg Pb added). Biomass and uptake varied by 20 to 100% within and between sixteen (16) species/varieties. The concentration and translocation factors (CF and TF) were statistically significantly different (P< 0.05) between species and within varieties as well as other growth parameters, which showed the effects of the Pb added treatment.   Results enhanced the determination of the uptake potentials of the plants studied and   their selection for further phytoremediation pot trials.

[Ogunlade-Anibasa, G.O, & Ramsey, M.H (2023) c. Uptake properties of some plant species in l homogenous  Lead (Pb) concentration -its implications for phytoremediation  N Y Sci J 2023;16(6):52-76]. ISSN 1554-0200 (print); ISSN 2375-723X (online). http://www.sciencepub.net/newyork. 08.doi:10.7537/marsnys160623.08.

Keywords: Homogenous,  Lead,  Phytoremediation,  Pot trials,  Uptake , Varieties

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