Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Chemistry (131)
- Education (120)
- Physics (115)
- Mathematics (106)
- Science and Mathematics Education (105)
-
- Physical Chemistry (74)
- Engineering (65)
- Teacher Education and Professional Development (65)
- Materials Chemistry (60)
- Higher Education (56)
- Environmental Sciences (54)
- Materials Science and Engineering (54)
- Social and Behavioral Sciences (54)
- Engineering Science and Materials (50)
- Life Sciences (50)
- Earth Sciences (41)
- Anthropology (35)
- Arts and Humanities (35)
- Electrical and Computer Engineering (33)
- Power and Energy (28)
- Chemical Engineering (20)
- Catalysis and Reaction Engineering (19)
- Geology (19)
- Creative Writing (18)
- Junior High, Intermediate, Middle School Education and Teaching (14)
- Poetry (14)
- Nanoscience and Nanotechnology (10)
- Philosophy (10)
- Logic and Foundations of Mathematics (9)
- Institution
-
- TÜBİTAK (220)
- Chinese Chemical Society | Xiamen University (72)
- Claremont Colleges (65)
- Virginia Commonwealth University (49)
- Chulalongkorn University (35)
-
- University of Northern Iowa (34)
- Bulletin of the Mineral Research and Exploration (17)
- University of New Hampshire (15)
- University of South Florida (13)
- University of Arkansas, Fayetteville (10)
- University of Minnesota Morris Digital Well (7)
- Old Dominion University (5)
- Embry-Riddle Aeronautical University (3)
- Sacred Heart University (2)
- Georgia College (1)
- University of Denver (1)
- Keyword
-
- Risk (6)
- Contents (4)
- Franklin Pierce Law Center (4)
- RISK (4)
- TOC (4)
-
- Table (4)
- UNH Law (4)
- Adsorption (3)
- Cyclic voltammetry (3)
- Electrochemistry (3)
- Human impact on karst (3)
- Land use (3)
- Pollution (3)
- Anodic oxidation (2)
- Apis mellifera (2)
- Conductivity (2)
- Conservation (2)
- Decision-making (2)
- Electrocatalysis (2)
- Electrochemical reduction (2)
- Electrodeposition (2)
- Environment (2)
- Expert (2)
- Fuel cell (2)
- Glassy carbon electrode (2)
- Hornfaced bee (2)
- Human impact (2)
- Hypophosphite (2)
- Inhibitor (2)
- Ionic conductivity (2)
- Publication
-
- Turkish Journal of Physics (112)
- Journal of Electrochemistry (72)
- Humanistic Mathematics Network Journal (65)
- Turkish Journal of Chemistry (54)
- Journal of Mathematics and Science: Collaborative Explorations (49)
-
- Turkish Journal of Mathematics (40)
- Environmental Journal (35)
- Journal of the Iowa Academy of Science: JIAS (34)
- Bulletin of the Mineral Research and Exploration (17)
- RISK: Health, Safety & Environment (1990-2002) (15)
- International Journal of Speleology (13)
- Journal of the Arkansas Academy of Science (10)
- Turkish Journal of Earth Sciences (9)
- Journal of the Minnesota Academy of Science (7)
- Turkish Journal of Electrical Engineering and Computer Sciences (5)
- Virginia Journal of Science (5)
- International Bulletin of Political Psychology (3)
- School of Computer Science & Engineering Faculty Publications (2)
- Rocky Mountain Conference on Magnetic Resonance (1)
- The Corinthian (1)
Articles 1 - 30 of 549
Full-Text Articles in Physical Sciences and Mathematics
Anneli Lax: In Memoriam, Elena Anne Corie Marchisotto
Anneli Lax: In Memoriam, Elena Anne Corie Marchisotto
Humanistic Mathematics Network Journal
No abstract provided.
Teaching A Humanities Course: A Mathematician’S View, Bill Marion
Teaching A Humanities Course: A Mathematician’S View, Bill Marion
Humanistic Mathematics Network Journal
No abstract provided.
Word Problems, Don Pfaff
A Response To Dancis, Margaret Schaffer
A Response To Dancis, Margaret Schaffer
Humanistic Mathematics Network Journal
No abstract provided.
Another Response To Dancis, Ted Eisenberg
Another Response To Dancis, Ted Eisenberg
Humanistic Mathematics Network Journal
No abstract provided.
Evaluation In The Mathematics Classroom, Emam Hoosain, B. Naraine
Evaluation In The Mathematics Classroom, Emam Hoosain, B. Naraine
Humanistic Mathematics Network Journal
No abstract provided.
What Is The Thing Called “Humanistic Mathematics?”, Tamar Apel
What Is The Thing Called “Humanistic Mathematics?”, Tamar Apel
Humanistic Mathematics Network Journal
No abstract provided.
Mathematics Is An Art: The Story Of A One-Time Course, Paul Fjelstad
Mathematics Is An Art: The Story Of A One-Time Course, Paul Fjelstad
Humanistic Mathematics Network Journal
No abstract provided.
A Reflection On The Word: Remembering The Word “Word” Is Reflexive, Paul Fjelstad, Ivan Ginchev
A Reflection On The Word: Remembering The Word “Word” Is Reflexive, Paul Fjelstad, Ivan Ginchev
Humanistic Mathematics Network Journal
No abstract provided.
Calculus For The Liberal Arts: A Humanistic Approach, Kathleen Shannon
Calculus For The Liberal Arts: A Humanistic Approach, Kathleen Shannon
Humanistic Mathematics Network Journal
No abstract provided.
Ode To Mathematics, Sandra Z. Keith
Ode To Mathematics, Sandra Z. Keith
Humanistic Mathematics Network Journal
No abstract provided.
Excerpts From Ivan’S Commandments To Himself, Ivan Niven
Excerpts From Ivan’S Commandments To Himself, Ivan Niven
Humanistic Mathematics Network Journal
No abstract provided.
Divisibility: A Problem Solving Approach Through Generalizing And Specializing, Rina Zazkis
Divisibility: A Problem Solving Approach Through Generalizing And Specializing, Rina Zazkis
Humanistic Mathematics Network Journal
No abstract provided.
The Role Of Values In Mathematics Education, Murad Jurdak
The Role Of Values In Mathematics Education, Murad Jurdak
Humanistic Mathematics Network Journal
No abstract provided.
Book Review: A Tour Of The Calculus By David Berlinski, Bernard Fleishman
Book Review: A Tour Of The Calculus By David Berlinski, Bernard Fleishman
Humanistic Mathematics Network Journal
No abstract provided.
Book Review: Mathematical Reflections By Peter Hilton, Derek Holton And Jean Pedersen, Ladnor Geissinger
Book Review: Mathematical Reflections By Peter Hilton, Derek Holton And Jean Pedersen, Ladnor Geissinger
Humanistic Mathematics Network Journal
No abstract provided.
Roots, Don Pfaff
Tea Tasting And Pascal Triangles, Paul Alper, Yongzhi Yang
Tea Tasting And Pascal Triangles, Paul Alper, Yongzhi Yang
Humanistic Mathematics Network Journal
No abstract provided.
What Else Do We Forget To Tell Our Teachers?: A Response To Dancis, Stephen Sproule
What Else Do We Forget To Tell Our Teachers?: A Response To Dancis, Stephen Sproule
Humanistic Mathematics Network Journal
No abstract provided.
A Gas Analysis Method For Determining The Perchlorate Current Efficiency And Other Applications, Zhigang Shao, Baolian Yi
A Gas Analysis Method For Determining The Perchlorate Current Efficiency And Other Applications, Zhigang Shao, Baolian Yi
Journal of Electrochemistry
A method for determining the current efficiency by means of measuring the flow capacity of the cell gas in a perchlorate cell has been proposed. The perchlorate cell system was equipped with an oxygen cathode or a Na + ion exchange membrane. This method is simple and convenient as well as accurate in the evaluation of the perchlorate current efficiency in the perchlorate cell as compared with the traditional methods of analysis. It is useful in the investigation of electrochemical problems with high perchlorate concentration,as well as for the assessment of electrocatalytic performance of anode materials.With an oxygen cathode in …
Aes Multi_Layer Structural Analysis Of Si Based Anodic Porous Alumina Films And Studies On Its Formation Mechanism, Junhui Wu, Jianping Zou, Qing Zhu, Ximao Bao
Aes Multi_Layer Structural Analysis Of Si Based Anodic Porous Alumina Films And Studies On Its Formation Mechanism, Junhui Wu, Jianping Zou, Qing Zhu, Ximao Bao
Journal of Electrochemistry
nm aluminum films were deposited onto a p_type,0.5 Ω·cm, 〈100〉 oriented silicon wafers using electron beam evaporation technique.Then,the wafers was immersed in 15 wt% H 2SO 4 for porous_type over_anodization under a constant voltage of DC 60V.During the anodization,the temperature of the electrolyte was maintained at 0 ℃.The obtained samples were investigated by means of transmission electron microscopy,scanning electron microscopy,and AES depth profile for multi_layer structural information.In addition, the basic anodic formation mechanism of the Si_based aluminum films was brielfly discussed.
Photoelectrochemical Studies On The Tio_2 Nanostructured Porous Film Sensitized By Cyanine Dye, Li Zhang, Maizhi Yang, Xuebin Qiao, Yanzhong Hao, Enqing Gao, Shengmin Cai
Photoelectrochemical Studies On The Tio_2 Nanostructured Porous Film Sensitized By Cyanine Dye, Li Zhang, Maizhi Yang, Xuebin Qiao, Yanzhong Hao, Enqing Gao, Shengmin Cai
Journal of Electrochemistry
The photoelectrochemical behaviors of the TiO 2 nanostructured porous film sensitized by cyanine dye were investigated in this paper.The results showed that the excitaed state level matched the conduction band edge of TiO 2 nanoparticle.Therefore the sensitization of the dye can increase the photocurrent intensity of the TiO 2 nanostructured electrode obviously and results in a red-shift of optical absorption from the ultra_violet region to the visible.As a result,the light_to _electricity conversion efficiency was improved evidently,the maximum value of IPCE has reached 12.1%.
Characterization And Electrochemical Behaviour Of Ce(Ⅲ) Amino Acid Imidazole Ternary Complexes, Huixia Wu, Zemin Wang, Haifeng Yang, Zongrang Zhang
Characterization And Electrochemical Behaviour Of Ce(Ⅲ) Amino Acid Imidazole Ternary Complexes, Huixia Wu, Zemin Wang, Haifeng Yang, Zongrang Zhang
Journal of Electrochemistry
Two Ce(Ⅲ)_amino acid_imidazole teranry complexe were synthesized,These complexes have the composition of Ce(Trp) 3IM(NO 3) 3·3H 2O and Ce(Phe) 3IM(NO 3) 3 respectively. The IR spectra indicate that the carboxy group of amino_acid and the N atoms of imidazole are coordinated with Ce(Ⅲ) ion.Cyclic voltammetry was used to study the electrochemical behaviour of Ce(Ⅲ) ion,the mixture of Ce(Ⅲ) with ligands,and Ce(Ⅲ) binary or ternary complexes. Within the scan range of -0.1 to 1.10 V (vs.SCE),both of ternary complexes depicted completely irreversible electron transfer process.
The Preparation Of Flexible Polymeric Anode And The Measurement Of Its Protective Ability For Cathodic Protection, Ailing Du, Heming Zhang, Mingzong Zhang
The Preparation Of Flexible Polymeric Anode And The Measurement Of Its Protective Ability For Cathodic Protection, Ailing Du, Heming Zhang, Mingzong Zhang
Journal of Electrochemistry
The flexible electrode,whose shape can be changed freely,was made of ethenyl copolymer and conductive component and proper amount of additive for cathodic protection.The resistance of electrode was measured.In low concentration of H 2SO 4,the flexible electrode can be used as auxiliary anode to protect the carbon steel.The protection ability of the flexible auxiliary anode was measured too.
Prparation Of Nanocrystaline Tio_2(Anatase)With High Thermal And Textural Sability By Electrochemical Method, Daobao Chu, Xingfu Zhou
Prparation Of Nanocrystaline Tio_2(Anatase)With High Thermal And Textural Sability By Electrochemical Method, Daobao Chu, Xingfu Zhou
Journal of Electrochemistry
Titanium alkoxides were prepared by anodic dissolution of metallic titanium in absolute ethanol in the presence of HN(C 2H 5) 2·HCl (electro_conductive additives).The solution was directly hydrolyzed to prepare nanocrystalline of TiO 2 (about 10nm)by a sol_gel process.The precursor gels was calcined at T =450 ℃ and 720 ℃for 30 min,and nanocrystalline of TiO 2 (anatase) with high textural and thermal stability was obtained.FTIR,XRD,TEM,were used to characterize the structure of titanium alkoxides and nanocrystalline of TiO 2.The characteristics of nanocrystalline of TiO 2 was depended on the properties of titanium alkoxides.The Ti(OEt) 4 as a source of titanium yielded the …
The Electrochemical Behaviors Of Superoxide Dismutase At Promoter Modified Gold Electrode, Xiaqin Wu, Xiaoyun Meng, Zhesu Wang, Zongrang Zhang
The Electrochemical Behaviors Of Superoxide Dismutase At Promoter Modified Gold Electrode, Xiaqin Wu, Xiaoyun Meng, Zhesu Wang, Zongrang Zhang
Journal of Electrochemistry
The electron_transfer process of superoxide dismutase was investigated by cyclic voltammetry at the 4,4'_dithiodipyridine,L_cysteine,histidine and arginine modified gold wire electrodes repectively.The quasi_reversible behavior was observed at L_cysteine modified gold electrode.An irreversible electrochemical behavior has been observed at hisdinine modified gold wire electrode.
Study On Electrochemical Reduction Properties Of Nitrobenzene, Chuna Ma, Wenkui Zhang, Hui Huang, Yongping Gan
Study On Electrochemical Reduction Properties Of Nitrobenzene, Chuna Ma, Wenkui Zhang, Hui Huang, Yongping Gan
Journal of Electrochemistry
The electrochemical reduction characteristics of nitrobenzene was extensively investigated by using the techniques such as quasi_steady_state polarization,cyclic voltammetry,fast linear potential sweep method and chronoamperometry in this paper.The electroanalytic properties of Cu,Cu_Hg and Cu_Ni electrodes were evaluated.Based on the study of the transient steping behaviour of nitrobenzene to PAP,the reduction mechanism was discussed.The results showed that the transition steps existed on the electrochemical reduction of nitrobenzene in acidic solution,the reactant is also absorbed on electrodes surface. The control step in the reduction of nitrobenzene was ascribed to the diffusion of nitrobenzene and its electrochemical reductive products in the acid solution.
High Performance Proton Exchange Membrane Fuel Cells, Jingrong Yu, Baolian Yi, Ming Han, Xiaoliang Cheng, Zhigang Shao, Jingxin Zhang
High Performance Proton Exchange Membrane Fuel Cells, Jingrong Yu, Baolian Yi, Ming Han, Xiaoliang Cheng, Zhigang Shao, Jingxin Zhang
Journal of Electrochemistry
Proton_exchange membrane fuel cells(PEMFC) using a perfluorosulfonic acid proton exchange membrane as an electrolyte can simplify water and electrolyte management.In this paper,the effects of thickness of PEM on the performance of PEMFC were studied.The Nafion_112 PEM and low platinum loading E_TEK electrode yielded very high power density,of the order of 0.95 W/cm 2.The energy_conversion efficiency,the degree of platinum utilization and stability for PEMFC using Nafion 112 and E_TEK electrode were also investigated.
Electrochemical Studies Of Metal Complexes In Solution, Yexiang Tong, Beisheng Kang, Qiqin Yang
Electrochemical Studies Of Metal Complexes In Solution, Yexiang Tong, Beisheng Kang, Qiqin Yang
Journal of Electrochemistry
The prospectus of electrochemical studies of metal complexes in solution have been introduced as a background of our research work. The electrochemical behaviors of the metal complexes and clusters have been investigated by many kinds of electrochemical methods.The content includes the standard electrode potential and the related equilibrium constant, electrochemical kinetics and the related behavior of structure, electrocatalysis and electrosynthesis of metal complexes. The electrode reaction mechanisms of the complexes have been approached. The methods for measuring some thermodynamic and kinetic parameters of the complexes are also given. Electrochemical studies would provid many kinds of important information for studying the …
Electro Oxidation Of Phenol On Sno_2/Ti Electrodes Prepared By Thermal Oxidation, Qingsong Zhang, Huihuang Wu
Electro Oxidation Of Phenol On Sno_2/Ti Electrodes Prepared By Thermal Oxidation, Qingsong Zhang, Huihuang Wu
Journal of Electrochemistry
A SnO 2/Ti electrode prepared by thermal oxidation was used as the anode for galvanostatic electrolysis in acidic solution containing phenol, the time_dependances of phenol concentration,chemical oxygen demand in solution(COD)and instantaneous current efficiency were determined during electrolysis.The results show that with the SnO 2/Ti anode instead of Pt,the COD significantly decreases at the same charge passage, and average current efficiency of oxidation increases by three times The mechanism for phenol oxidation at two electrodes was discussed.