Questions in Topics
Ask, share and discuss - with a global network of researchers.

Topics makes it easy to ask questions, get answers and share interesting content with other researchers. Browse topics by discipline to find out what's happening in your field.

Browse Topics

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
  • Answer added in Fluorescence Spectroscopy
    11 PMMA film emission spectrum under blue excitation?
    By Nikodem Czechowski · Nicolaus Copernicus University
    Nikodem Czechowski · Nicolaus Copernicus University
    I use various bandpass filters, from 10 nm to 40 nm wide centered in the region 650..670 nm. I use an EM CCD camera for detection so it is sensitive e... [more]
  • Answer added in Organic Synthesis
    84 What are the best reagents to reduce aromatic nitro to amine? Does anyone have suggestions other than Raney Ni, Pd/C, Sn/HCl, Fe/HCl?
    By Kirtipalsinh Solanki · Zydus Research Centre
    Taoues Barouri · University of Constantine 1
    For my experience, Ireduced p-nitropheno to p-aminophenol using CaCl2 (0.6g dissolved in 1ml water) /Zn (1.8g) for 1.2 g of the p-nitrophenol: reflux... [more]
  • Answer added in Cognitive Linguistics
    177 What is the role of language in thinking? Do we think using language, or do we only use language to express already made thoughts?
    By Leonid Perlovsky · Harvard University
    Lonny Meinecke · Grand Canyon University
    Thanks Louis (and Ana) for such wonderful quotes/thoughts; I think each of us can imagine residing in a sandstone cave and – in time – seeing an i... [more]
  • Answer added in Nanomaterials
    13 Could anyone explain how graphene oxide, which is negatively-charged, can become positively-charged when nickel nitrate is added to the GO solution?
    By Boon-Hong Wee · University of Incheon
    S. Alekseev · National Taras Shevchenko University of Kyiv
    Douglas, Co3+ could be stabilized only by high-field ligands. GO has only -CO2H groups and other O-containing low-field stuff. I have very big doubts ... [more]
  • Answer added in Soil Science
    2 Water quality can improve with help of magnetic treatment ?
    By Bhupender Shekhawat · Krishi Vigyan Kendra, Kheda
    Anil Singh · Indian Council of Agricultural Research
    Yaa, with limited success that too for substances having afinity to magnet. 
  • Answer added in Gender Studies
    19 Gender differences in moral identity?
    By Susanne Täuber · University of Groningen
    Larry Carlson · United Tribes Technical College
    Gulcimen: As I have not found it reasonably convenient to access this document, it is difficult to assess its nature or relationship to moral identity... [more]
  • Answer added in Video Game Design
    10 How are others gathering psychological data from video game play for studies not conducted in person?
    By Lauren White · Fielding Graduate University
    Robert Hamilton · Stanford University
    If you're looking to track player-generated control data or motion of actors in game-space over time, we use a customized version of the Unreal Develo... [more]
  • Answer added in Geometric Morphometrics
    6 Is there any (open source) software in which I can set 3D-landmarks also inside structures and not only on the surface?
    By Stefan Curth · Friedrich-Schiller-Universität Jena
    Andrew Iwaniuk · University of Lethbridge
    You can also try MorphoJ (http://www.flywings.org.uk/MorphoJ_page.htm) and the various packages available from James Rohlf's website (http://life.bio.... [more]
  • Question asked in Thin Films and Nanotechnology
    New How do i evaluate the optical constant:n.k for very thin film where intereference fringes are not observable using only transmittance data.
    Free fitting software or spreadsheet are welcomed. 
    By Leke Olarinoye · Federal University of Technology Minna
  • Answer added in Computational Intelligence
    5 rough set code
    By Hala Own · National Research Institute of Astronomy and Geophysics
    Sandipan Karmakar · IIT Kharagpur
    Many many thanks Dariusz for your kind help...I am going through your thesis and in case of any problem I will write back to you. Thanks again... 
  • Answer added in Academic Writing
    11 Sexist writing: how to avoid it?
    By Abdessamad Mouzoune · University Mohammed V Agdal
    Abdessamad Mouzoune · University Mohammed V Agdal
    It happens that "we" technique is also used to avoid "sexist writing"! "When a student writes a paper, he must proofread carefully." can be rewritten... [more]
  • Answer added in Programming Languages
    33 Does anyone have any suggestions for a good book on Python ? Thanks!
    By Salman Beg · National Institute of Science & Technology
    Prasanth G. Narasimha-Shenoi · Government College, Chittur, Palakkad, Kerala, India - 678104
    I have seen a book "Non-programmers Tutorial for python 2.6 
  • Answer added in Proteins
    4 What's a good non-coordinating buffer at pH ~5.5 for proteins that are involved in metal cation complexes?
    By Michael Hufnagle · University of Dayton
    Michael Hufnagle · University of Dayton
    Thank you so much, you have all been a great help! 
  • Answer added in Methods
    179 How to manage my references (pdfs)?
    By Juliane Salbach · Universitätsklinikum Dresden
    Aybek Khodiev · Bechtel Corporation
    Mendeley. Free and easy to manage/organize pdfs 
  • Answer added in Power Electronics
    7 Why are we not considering the total output voltage in Sine-PWM Inverters?
    By Goutham Selvaraj · University of Texas at Dallas
    G. Diana · University of KwaZulu-Natal
    Ok so what you appear to be referring to are the harmonic components. One could do a Fourier Analysis to do this as has been done in the past where pr... [more]
  • Answer added in Material Characterization
    38 Can anyone clarify the difference between Grain size, particle size and crystallite size?
    By Tarun Garg · Indian Institute of Technology Bombay
    Ori Yeheskel · Ben-Gurion University of the Negev
    Abdulla, please be more careful when you respond. respect yourdelf. Please read carefully what Dr. Matteo Leoni wrote to you. And if you think the que... [more]
  • Answer added in Pattern Recognition
    2 How can I display area which has maximum number of edges in image using matlab?
    Thanks Dariusz to your interest, I have an image and i want to segment part of it which has max number of edges 
  • Answer added in Moral Philosophy
    25 Do Objective Moral Values (OMV's) exist? If so, what is their nature? If not, why are we so inclined to act as though they did?
    By Bill Johnson · Husson University
    Larry Carlson · United Tribes Technical College
    Chris. I agree that there are no OMVs. Value is culturally and individually relative. I was not suggesting, of course, that anyone was personally... [more]
  • Answer added in Nutrition
    4 Does anybody have information and documentation about zinc deficiency and nervous disorder?
    By Yanick Simon · Université Quisqueya
    Yanick Simon · Université Quisqueya
    Thanks a lot Geir. I wait for the article about "The Role of Zinc and Copper in Autism Spectrum Disorders" with impatience. I plan to publish an art... [more]
  • Answer added in Wireless Communications
    20 How many publications are expected by a PhD student during the PhD program?
    By J.M.J.W. Jayasinghe · Wayamba University of Sri lanka
    Martin Iglesias-Arteaga · National Autonomous University of Mexico
    In summary my point is "quality" not "quantity" should be in the aim of all scientists. 
  • Question asked in organic pellets
    New Why organic pellets fermented?
    pellets of mushroom compost fermented in bags, WhY? 
  • Answer added in Clinical Ethics
    15 Is it necessary to have consent when conducting a retrospective study? If yes, from whom?
    By Fahmi Khan · Hamad Medical Corporation
    Inger Brännström · Researcher in Epidemiology & Public Health at Private, R.N. PhD Sweden
    Yes. According to the Helsinki declaration approval by a research Ethics committee is needed for a new clinical survey (human). Thus, even if the form... [more]
  • Answer added in Biology
    7 Should self-citations have any value for quantifying the impact of a publication?
    By Leonard Amaral · Universidade NOVA de Lisboa
    Lisbeth Nilsson · Lund University
    I am one of those doing 'new' research and my opinion is that I have an absulute need to make self-citations to my other publications as they present ... [more]
  • Answer added in Biochemical Engineering
    100 Is the relation between OD reading and cell concentration (cells/mL) of bacteria different in various culture media?
    By Hamed Khodadadi · Eastern Mediterranean University
    Arieh Zaritsky · Ben-Gurion University of the Negev
    At least in the well-studied Escherichia coli and Salmonella typhimurium, where cell mass per number of oriC's at the time of replication-initiation i... [more]
  • Question asked in Stereotyped Behavior
    New Can stereotypy be considered as one type of dyskinesia?
    Following that, then would one expect mechanisms to be similar for both stereotyped movements (e.g. Those seen on amphetamines or cocaine) and dyskine... [more]
    By Ben Sagot · The University of Tennessee Health Science Center
  • Answer added in Water Quality
    11 Is it possible to add magnesium chemicals in community water supplies where water resources are poor in magnesium?
    By Yanick Simon · Université Quisqueya
    Yanick Simon · Université Quisqueya
    Hello Ingo, I would like to have more information about chlorophyll of green vegetables. I am working on the relationship between water hardness and c... [more]
  • Answer added in Soil Analysis
    20 Standard soil texture analysis: review on methods and classification systems
    By Elena Kondrlova · Slovak University of Agriculture in Nitra - Slovenska posnohospodarska univerzita v Nitre
    R. Adamcova · Comenius University in Bratislava
    Look at STN 72 1001 - this is also a real standard (Slovak Technical Standard), but the fraction intervals are different: 0.002-0.063-2.0! At our depa... [more]
  • Answer added in Economics
    97 Return to Keynes, is it sufficient?
    By Yoshinori Shiozawa · Chuo University
    Niccolo Caldararo · San Francisco State University
    Dear Milos: Thank you for the clarification on culture and choices in the market place. I do have a problem with Fukuyama's argument. I think th... [more]