International Journal of Chemistry最新文献_第4页

Steady State Heat Transport by Microbubble Dispersions Mediating Convection With Phase Change Dynamics 相变动力学微泡色散介导对流的稳态热传递

International Journal of Chemistry Pub Date : 2022-04-14 DOI: 10.5539/ijc.v14n1p30

W. Zimmerman

{"title":"Steady State Heat Transport by Microbubble Dispersions Mediating Convection With Phase Change Dynamics","authors":"W. Zimmerman","doi":"10.5539/ijc.v14n1p30","DOIUrl":"https://doi.org/10.5539/ijc.v14n1p30","url":null,"abstract":"A new theory for additional heat transfer convected by a dispersed phase of microbubbles was posited recently. An additional convection term in the heat transport equation reflects the latent heat of vapor of the liquid carried by the microbubbles from hot zones that vaporize more liquid to cold zones where condensation releases the latent heat. This theory was shown to be consistent with analysis of observations of freezing times measured by in the original Mpemba effect study, by inferring heat transfer coefficients fitted by Newton’s law of cooling. In this paper, the scaling analysis, leading to the proposition that the additional heat flux is proportional to the phase fraction of microbubbles, is tested by steady state solutions of the canonical hot wall / cold wall buoyant convection problem. For phase fractions 0.02 and 0.1, the maximum ratio of additional Nusselt number emergent is five, occurring in the microfluidic regime. Increasing the characteristic length of the domain maintains the monotonicity of the increase in additional Nusselt number ratio over the case of no microbubbles present. The additional heat transfer due to the microbubble dispersion, ranging from 5-50%, is found to be nearly proportional to the microbubble phase fraction for the range of 0.02 to 0.2. However, larger characteristic lengths introduce insufficient heat flux from the hot wall to maintain a “driven cavity” flow structure, so that the steady state structure that emerges is a stable stratification with thin boundary layers near the hot and cold walls, with weak shear flow convection. The stable stratification resultant at higher characteristic lengths suppresses the additional heat flux due to microbubble mediation, but only moderately deviating from proportionality.","PeriodicalId":13866,"journal":{"name":"International Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78446651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Catalysis Mechanism and Application of Carbon Gasification Reaction-A Comparison of Two Heterogeneous Catalysis Mechanisms 碳气化反应的催化机理及应用——两种非均相催化机理的比较

International Journal of Chemistry Pub Date : 2022-04-14 DOI: 10.5539/ijc.v14n1p23

Jiahui Jin

{"title":"Catalysis Mechanism and Application of Carbon Gasification Reaction-A Comparison of Two Heterogeneous Catalysis Mechanisms","authors":"Jiahui Jin","doi":"10.5539/ijc.v14n1p23","DOIUrl":"https://doi.org/10.5539/ijc.v14n1p23","url":null,"abstract":"This article is a brief summary article of research. The results of the three times experiments are reviewed. two heterogeneous catalysis mechanisms are introduced, namely: Chemical Reaction Mode Cyclic Catalysis Mechanism-CRM and Electron Cyclic Donate-Accept Catalysis Mechanism-ECDAM or Electron Orbital Deformation-Recovery Cyclic Catalysis Mechanism -EODRM. Some difficulties encountered by CRM are listed. The author clearly points out that the CRM is not credible. This false theory has misled us for more than 100 years. About ECDAM, the article also gives a brief description. The main point of ECDAM is that the catalysis phenomenon are physical rather than chemical phenomenon. The catalysts do not participate in chemical reactions. It's just contact, electron cyclic donate-accept or electron orbital deformation-recovery cycle. The theory contains three viewpoints: 1. There is a boundary between the catalyst and the poison. 2. The active of the catalyst or the degree of toxicity of the poison is closely related to ihe electronegative value of the catalyst or poison. 3. The active of catalyst is closely related to the chemical state of the catalyst The selectivity of catalyst is also related to electronegative or energy level According to ECDAM, the author considers that there are several problems worth studying in production and scientific research. such as: alumina is a poison in the Fe ammonia synthesis catalyst. The Cordierite (2MgO·2Al2O3·5SiO2) ceramic honeycomb support is also a poison in automotive exhaust purification catalyst. The Cordierite ceramic honeycomb is retardant in wall flow filter for diesel vehicles. Activated carbon is a poison in the Ruthenium catalyst for ammonia synthesis. Alumina and activated carbon all are a poison to noble metal catalysts, and so on.","PeriodicalId":13866,"journal":{"name":"International Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80358301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

“Spatial Data Analysis for Ground Water Quality Assessment With Special Reference to Fluoride” - A Case Study of Dhar District, Madhya Pradesh, India 《含氟地下水水质评价的空间数据分析》——以印度中央邦达尔县为例

International Journal of Chemistry Pub Date : 2022-01-31 DOI: 10.5539/ijc.v14n1p8

D. K. Umak, Sandeep Rastogi, I. Das

{"title":"“Spatial Data Analysis for Ground Water Quality Assessment With Special Reference to Fluoride” - A Case Study of Dhar District, Madhya Pradesh, India","authors":"D. K. Umak, Sandeep Rastogi, I. Das","doi":"10.5539/ijc.v14n1p8","DOIUrl":"https://doi.org/10.5539/ijc.v14n1p8","url":null,"abstract":"Water is a prime natural resource and physiological necessity to mankind. Therefore, drinking water must not carry harmful chemicals as well as biological contaminants for the well-being and human health. Some of the chemicals like Fluoride, Iron, Arsenic, Cadmium, Chromium, Lead, selenium, and Nitrate in water may produce serious physiological changes when exist beyond permissible concentration. \u0000 \u0000The Aim of the study was to create spatial map for drinking water purpose for Dhar district, MP. The ground water quality data were collected from PHED, M.P. and IMIS (Ministry of Drinking water & Sanitation) Website,Government of India. The GWQ layers were created separately for each element for Pre-Monsoon and Post-Monsoon period from the well point layers with interpolation technique. Each element wise layer has been categorised into `three catagories (1) potable water in Desirable limits (2) Potable water in permissible limits (3) non-potable ground water, as per BIS standard, 2015. The Union of eight element layers of each pre-monsoon and post-monsoon has been done and integrated pre-monsoon and Integrated post-monsoon Ground Water Quality (GWQ) map have been prepared and after the Union of these two maps, the Final ground water quality map has been prepared. It was concluded from the study, that multiple parameters are affecting the quality of ground water in Dhar district and particularly excess Fluoride, Nitrate, Total Hardness (as Caco3), Iron, pH, and Total Dissolve solids are prevalent in the area. About 69.66% Habitation of Dhar district is severely affected mainly by excess of Fluoride, Nitrate & Total Hardness (as Caco3), pH & Iron(Fe) & It is observed that about 70.51% area of Dhar district has been affected in terms of Ground Water Quality.","PeriodicalId":13866,"journal":{"name":"International Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81885434","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ionic Disorders in Malaria and Dengue Co-Infection 疟疾和登革热合并感染中的离子紊乱

International Journal of Chemistry Pub Date : 2021-11-03 DOI: 10.5539/ijc.v14n1p1

F. Soudre, A. Kouraogo, A. Kiba, R. Karfo, T. Guiguemde, Bibata Kabore, E. Kabré, J. Sakandé

{"title":"Ionic Disorders in Malaria and Dengue Co-Infection","authors":"F. Soudre, A. Kouraogo, A. Kiba, R. Karfo, T. Guiguemde, Bibata Kabore, E. Kabré, J. Sakandé","doi":"10.5539/ijc.v14n1p1","DOIUrl":"https://doi.org/10.5539/ijc.v14n1p1","url":null,"abstract":"Introduction: The aim of this study was to investigate ionic disorders in malaria and dengue co-infection at Ouagadougou, Burkina Faso. \u0000 \u0000Material and methods: This is a descriptive cross-sectional study with retrospective data collection, carried out in the laboratory of the Pediatric University Hospital Charles de Gaulle in Ouagadougou, Burkina Faso, from January 1st, 2017 to December 31st, 2019. The study was on patients who performed a thick blood drop/smear, dengue serology and blood ionogram. \u0000 \u0000Results: On 1405 cases included in the study, 102 patients (7.26%) were confirmed of malaria. Dengue serology was positive in 235 patients (16.72%). The frequency of co-infection was 1.14% (n=16). The mean age of the patients was 9.93 years and the age group of 0 to 15 years represented 78.93% of the cases. There was a male predominance with a sex ratio (M/F) of 2.58. Hyponatremia (40%), hypercalcemia (40%), hypokalemia (30%) and hypophosphatemia (30%) were the main blood ionogram disturbances in malaria and dengue co-infection. The statistically significant disturbances in case of malaria and dengue co-infection were the absence of hypobicarbonatemia (p=0.036). \u0000 \u0000Conclusion: Malaria and dengue are responsible for significant morbidity and mortality in Burkina Faso. Although co-infection was rare in the study (1.14%), it was associated with several blood ionogram disturbances. Evaluation and consideration of these disturbances during treatment would contribute to a better care of patients.","PeriodicalId":13866,"journal":{"name":"International Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86896777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reviewer Acknowledgements for International Journal of Chemistry, Vol. 13, No. 2 《国际化学杂志》第13卷第2期审稿人致谢

International Journal of Chemistry Pub Date : 2021-10-29 DOI: 10.5539/ijc.v13n2p41

A. John

{"title":"Reviewer Acknowledgements for International Journal of Chemistry, Vol. 13, No. 2","authors":"A. John","doi":"10.5539/ijc.v13n2p41","DOIUrl":"https://doi.org/10.5539/ijc.v13n2p41","url":null,"abstract":"International Journal of Chemistry wishes to acknowledge the following individuals for their assistance with peer review of manuscripts for this issue. Their help and contributions in maintaining the quality of the journal is greatly appreciated. Many authors, regardless of whether International Journal of Chemistry publishes their work, appreciate the helpful feedback provided by the reviewers. \u0000 \u0000 \u0000 \u0000Reviewers for Volume 13, Number 2 \u0000 \u0000 \u0000 \u0000 \u0000 \u0000 \u0000 \u0000Abdallah El-Gharbawy, Alexandria University, Egypt \u0000 \u0000Ahmad Galadima, Usmanu Danfodiyo University, Nigeria \u0000 \u0000Ahmet Ozan Gezerman, Toros Agri-Industry, Research and Development Center, Turkey \u0000 \u0000Ayodele Temidayo Odularu, University of Fort Hare, South Africa \u0000 \u0000Brice Ulrich Saha Foudjo, Catholic University of Cameroon, Cameroon \u0000 \u0000Farhaoui Mohamed, National Office of Electricity and Drinking Water (ONEE), Morocco \u0000 \u0000Gholam Hossain Varshouee, National Petrochemical Company, Iran \u0000 \u0000Ho Soon Min, INTI International University, Malaysia \u0000 \u0000Kevin C. Cannon, Penn State Abington, USA \u0000 \u0000Khaldun Mohammad Al Azzam, Batterjee Medical College for Sciences and Technology, Saudi Arabia \u0000 \u0000Nanda Gunawardhana, Saga University, Japan \u0000 \u0000Nanthaphong Khamthong, Rangsit University, Thailand \u0000 \u0000Nejib Hussein Mekni, Al Manar University, Tunisia \u0000 \u0000Rafael Gomes da Silveira, Federal Institute of Education, Brazil \u0000 \u0000Rania I.M. Almoselhy, FTRI&ARC, Egypt \u0000 \u0000Severine Queyroy, Aix-Marseille Université, France \u0000 \u0000Sintayehu Leshe, Debre Markos University, Ethiopia \u0000 \u0000Sitaram Acharya, Texas Christian University, USA \u0000 \u0000Tony Di Feo, Natural Resources Canada, Canada \u0000 \u0000 \u0000 \u0000Albert John \u0000 \u0000On behalf of, \u0000 \u0000The Editorial Board of International Journal of Chemistry \u0000 \u0000Canadian Center of Science and Education","PeriodicalId":13866,"journal":{"name":"International Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79173934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Kinetics and Mechanism of Catalyzed Oxidation of L-Cysteine by Salen Schiff Base Complexes of Co(III), Fe (III) and Cr(III) Co(III)、Fe (III)和Cr(III) Salen Schiff碱配合物催化l -半胱氨酸氧化的动力学和机理

International Journal of Chemistry Pub Date : 2021-07-10 DOI: 10.5539/IJC.V13N2P25

H. Abdel-Halim, H. Baker, Akef I. Alhmaideen, A. Abu-Surrah

引用次数: 0

A Chemical Reaction Can Save Mankind -A Review of Experiment Research on CO2+C=2CO and Application 一种能拯救人类的化学反应——CO2+C=2CO实验研究及应用综述

International Journal of Chemistry Pub Date : 2021-05-30 DOI: 10.5539/IJC.V13N2P1

Jiahui Jin

引用次数: 1

Structural and Thermal Investigations of L-CuC4H4O6·3H2O and DL-CuC4H4O6·2H2O Single Crystals L-CuC4H4O6·3H2O和DL-CuC4H4O6·2H2O单晶的结构和热研究

International Journal of Chemistry Pub Date : 2021-04-10 DOI: 10.5539/IJC.V13N1P38

T. Fukami, S. Tahara

引用次数: 2

Structure and Morphology Properties of Nanoparticle Hematite Pigment from Lathe Waste 车床废渣中纳米赤铁矿颜料的结构与形貌

International Journal of Chemistry Pub Date : 2021-03-25 DOI: 10.5539/IJC.V13N1P21

L. M. Khoiroh, Asmaul Dwi Ayu Sholekah, E. Yulianti

引用次数: 2

Pomade Production from the Metallic Soaps of Telfairia occidentalis Seed Oil 用西洋槐籽油金属皂生产润发油

International Journal of Chemistry Pub Date : 2021-03-25 DOI: 10.5539/IJC.V13N1P30

A. Udoh, I. Udoekpo, E. Inam

引用次数: 0