Category Archives: Blogging

I’m putting a new blog out there


As if I didn’t have enough things to do I’m launching a new blog inspired by the #365papers hashtag on Twitter and the naturalproductman.wordpress.com blog. In it I’ll hopefully list, write a femto-review of all the papers I read. This new effort is even more daunting than the actual reading of the huge digital pile of papers I have in my Mendeley To-Be-Read folder, the fattest of them all. The papers therein wont be a comprehensive review of Comp.Chem. must-read papers but rather papers relevant to our lab’s research or curiosity.

Maybe I’ll include some papers brought to my attention by the group and they could do the review. The whole endeavor might flop in a few weeks but I want to give it a shot; we’ll see how it mutates and if it survives or not. So far I haven’t managed to review all papers read but maybe this post will prompt to do so if only to save some face. The domain of the new blog is compchemdigest.wordpress.com but I think it should have included the word MY at the beginning so as to convey the idea that it is only my own biased reading list. Anyway, if you’re interested share it and subscribe, those post will not be publicized.

Annual state of the Research Group


Like everybody else, we are doing a brief recount of the achievements of this lab during 2016 if for no better reason because it helps me map my annual report.

We published seven articles:

  1. A Mixed DFT-MD Methodology for the In Silico Development of Drug Releasing Macrocycles. Calix and Thia-Calix[n]Arenes as Carriers for Bosutinib and Sorafenib Journal of Computational Chemistry 2016, 37, 10, 940–946
  2. In silico design of calixarene-based arsenic acid removal agents J Incl Phenom Macrocycl Chem (2016) 85:169–174
  3. Aromatization of pyridinylidenes into pyridines is inhibited by exocyclic delocalization. A theoretical mechanistic assessment Tetrahedron 72 (2016) 4194-4200
  4. Reactivity of electrophilic chlorine atoms due to σ-holes: a mechanistic assessment of the chemical reduction of a trichloromethyl group by sulfur nucleophiles Phys. Chem. Chem. Phys., 2016, 18, 27300-27307
  5. Ab Initio Modeling Of Friction Reducing Agents Shows Quantum Mechanical Interactions Can Have Macroscopic Manifestation J. Phys. Chem. A, 2016, 120 (46), pp 9244–9248
  6.  Crystal Structure and DFT Studies of 4-Methyl-N-(1-phenylethyl)-N´-(1-phenylethylidene)benzenesulfonohydrazide. Evidence of a carbene insertion in the formation of acetophenone azine fromacetophenone p-toluensulfonyl hydrazone. Canadian Journal of Chemistry 2016 (doi: 10.1139/cjc-2016-0183)
  7. Synthesis and Crystal Structures of Stable 4-Aryl-2-(trichloromethyl)-1,3-diaza-1,3-butadienes Synthesis 2016, 48, 2205–2212

Two students got their degrees:

  1. María Eugenia “Maru” Sandoval got her Masters Degree with a thesis on mechanisms for the excitonic transference in photosynthetic pigments.
  2. Gustavo “Gus” Mondragón got his Bachelor of Sciences Degree also with a thesis on mechanisms for the excitonic transference in photosynthetic pigments.

And even a patent was filed! (more on that next year when appropriate.)

We participated in the annual Mexican Meeting on Theoretical Physical Chemistry with four posters and the internal symposium both at CCIQS and the Institute of Chemistry.

2016 was a great year for us and we hope to have an even better 2017 but just as before it will only be possible thanks to the hard work and dedication of all the members of this lab, -some of which have now left us to pursuit higher ends like Maru Sandoval who leaves for Spain and Guillermo Caballero who is already at Cambridge- and also to my colleagues who keep inviting us to collaborate in exciting projects. We have new members in the lab and also new research interests but the one common denominator throughout the years in the lab is fun; having fun in doing chemistry always.

Thank you to everyone who has ever read this blog and to those who have dropped a line here and there; I know I’ve neglected this space during this year, I want to fix it in 2017. May next year be awesome for everyone; lets make it so!

Negotiations gone wrong and other recent scandals


About a month ago my wife and I got invited by our good friend Dr. Ruperto Fernandez (his PhD is in transport logistics and engineering) to his final presentation for a course in managerial skills he’d taken for over six months, and while I wasn’t all that thrilled about waking up at 8 AM on a Saturday, I went to cheer my good friend and show him my sleepy support. His presentation dealt with negotiations and the required skills to master them, and while he agreed that there is a huge amount of talent involved in being a good negotiator, he also pointed out that some basic knowledge of the procedure can go a long way in helping us with little to no talent in achieving the best possible outcome. Basically, a negotiation involves the agreement between a person with something which another person wants; meeting both parties expectations at the fullest extent possible is the ideal endpoint for an iterative give-and-take between them. Or so it goes.

Recently a scandal that involved the biology freelance blogger DNLee, who blogs for Scientific American with the column The Urban Scientist, took place: DNLee was asked by Biology-Online.org to write for them. Then the negotiation started; she had something the editors wanted: her texts. She agreed to do it and presented her fee (second part of the negotiation process: “I got what you want and here is what I ask in return for it“), instead of having an offer made (third part of the negotiation process: “ok, that is what you want but this is what I can give you“) the blogger got a nasty message, which I believe maybe was intended to elicit a response to better accommodate the editor’s demands but that was nothing more than a plain nasty insult: The editor asked if she was the urban scientist or the urban whore (end of negotiation; nobody got anything. Furthermore, feelings were hurt, reputations questioned and the door for future negotiations between both parties was shut completely). If the editor was unable to pay any fee at all then the editor should have tried to convince the blogger of participating for free; I would have offered her a bigger space than a regular blogger, or maybe even invited her to participate as an editor. I’m not sure they have some sort of business model but something could have been arranged. Had this negotiation not met at any point in the middle then a polite thank you could have left the door open for a future time. DNLee has a reputation that allows her to charge for her writings, had it been me, I’d probably had done it for free but because I need more exposure than her who is already famous. Internet support came promptly and hard as can be seen here and here, not that it wasn’t called for, of course!

But the issue, sadly, didn’t end there, DNLee wrote about this in her blog at SciAm, but the post was later on deleted by the editors. Dr. Mariette DiChristina tweeted that the post wasn’t related to science so it didn’t fit in the site. Pressure in blogs and other social networks prompted SciAm to place the article back on the site. Click here to go to the post.

Calling someone a whore is simply unacceptable.

During his presentation, my friend Dr. Ruperto Fernandez, talked about a negotiation he had with a potential employer. According to his account of the process, it ended quite swiftly when he was offered a much lower salary than the one he currently earns. He said the offer had some good points that could have made him accept even 5 to 10% less income respect to his current salary, but much less than that would not help him cover the bills and that was a total deal-breaker. But the talk didn’t end there, some other joint projects were laid for them to work on together and the door is still open for the future when they may be able to match my friend’s expectations as biology-online should have done with DNLee.

It has been a rough couple of weeks for the Scientific American community; first this and now the leaving of a great science writer, Bora Zivcovic whose misconduct has forced his exit out of the popular magazine. So now the aftermath for both issues remains to be seen. Sexism, though, could be found to be a common denominator in both cases: one was a victim of it, the other one is guilty of inflicting it through various instances of sexual harassment. Should this mean that biology-online, Bora Zivcovic and the affiliated-to-the-two-previous parties, the Scientific American Magazine, are to be deemed as unworthy? I hardly think so. None of us is close to sanctity and we all make mistakes, some of them willingly and other unwillingly but we are accountable for each and every one of them nonetheless; but at the same time we should also be able to separate both sides of each story and keep the best of each side while keeping a close eye (and even a loud mouth) about the wrong in each side.

I wish nothing but the best to every person involved in any of these recent events. Why is it so hard for people to just ‘play nice‘? I’ve heard many times this world would be a better place if we cared more for each other, but sometimes it seems that its actually the opposite; that this world would be be better if we didn’t care so much: if we didn’t care about the color of our skin; our gender; our nationality or ethnicity; our sexual orientation; our social status. This brings me back yet again to that presentation by Dr. Fernandez, where he was asked to describe the way he was perceived by others at his workplace and he said he didn’t quite enjoy social interactions so he is perceived as serious and aloof but was always willing to join a new project, so when reached out for one of these he’s all smiles and work. Shouldn’t we all back off a little bit from each other from time to time?

How to read (and perhaps even write) a scientific paper


This post was inspired by this other one, featured in WordPress’ Freshly Pressed section, on how should non-scientist read a scientific paper.  While the approach presented therein is both valid and valuable, I’d like to address the way I think a scientist should read a paper, given the fact that we need to read a lot of them at all times. Each scientist has their own reading style, not to mention their own writing style, and while my CV could indicate I don’t know how to do neither one, here I present to you my scientific-paper-reading style which I consider to be the most suitable for me.

I’d like to start by emphasizing that I dive into scientific literature in a bona fide fashion. That is not to say I’m totally naive or even gullible, but even when science is all about questioning and casting doubt onto all sorts of claims, we can’t re-develop every bit of science we need. At a certain point we must start *gasp* believing trusting other scientists’ claims. Reading in what I call bona fide is not mutually exclusive with critical reading. This sort of scientific trust is earned, to a degree, mostly by two indicators: Author’s preceding reputation at the time of publication of any given paper as well as the journal’s. Both indicators aren’t without controversy and flaw.

The way I read a paper is the following: I start with the Abstract, then follow with the Conclusions, then the Results section, sometimes I read the details of the methodology and seldom read the Introduction. Let me explain.

I read the abstract first because I read in bona fide as I hope the authors wrote the paper in bona fide. If properly written, the abstract should include all the relevant information as to what was done, why, and how but also point to the knowledge derived from it all: Their conclusions! and that is why I follow with that section. I’m interested in knowing what the authors learned and ultimately want me to learn about their study. Once again I’m reading in bona fide, so I hope they weren’t tempering their results to fit their preconceptions, that all experiments were thoroughly self-judged, validated, correlated, referenced and controlled. Recently, my sister Janet, who is a physicist working on her PhD in neuroscience, told me about some friends of hers who never (shall I say, never have I ever?) read the conclusions as to not becoming biased by the authors. To me it seems like too much work having to scrutinize every piece of data again in order to come up with my own conclusions when authors, collaborators, people on the hallway down the lab (optional), referees and editors (vide infra) have already (hopefully) done it (properly). Still I put on my scientist badge and question everything I critically read in the results section trying thus to understand how did the authors reached their conclusions and asking myself if I could come up with something entirely different. No? OK, how about something slightly different? Still no? Well, do I agree with the authors on their findings and their observed results? And so on. I like thinking that my critical reading process resembles the Self Consistent Field method which iteratively reaches the best wavefunction for a set of certain given conditions, but it never reaches the exact one.

The methodology section is a bit tricky, specially when it comes to computational chemistry. Back when I was a grad student, working in an inorganic chemistry lab, I’d only read the methodology if I had any plans of reproducing the experiment, other than that I didn’t care too much if reagents were purchased from Aldrich or Fluka or if the spectrophotometer was a Perkin Elmer one, I just expected authors to have purified their reagents prior to usage and calibrated all spectrophotometers. Now in computational chemistry I read about the methods employed, which functional and what basis set were used and why were they selected are my most frequent questions, but the level of theory is usually stated in the abstract. I also take a look at what methods were used to calculate which properties; these questions are important when we have to validate our trust in the results in front of us.

Finally, I seldom read the introduction because, if the paper is relevant to my own research, I don’t need to read why is important or interesting, I’m already sold on that premise! that is why I’m reading the paper in the first place! If both me and the author act in bona fide, we both already know what the state of the art is, so lets move on because I have a ton of other papers to read. Hence, I read the introduction only when I’m trying to immerse myself in a new field or when reading something that seems interesting but which has little to do with my area of expertise. There is another reason why I almost never read introductions and that is that, even when I try to work in bona fide, there are a lot of people out there who don’t. Twice have I received the reviews from a mysterious referee who believes it would serve the work a great deal to cite two, maybe three, other papers which he or she lists for your convenience, only to find out that they all belong to the same author in each case and that they are not quite entirely related to the manuscript.

In the title of this post I also try to address the writing of a scientific paper, although I’m not an authority on it, I think today’s key phrase is bona fide. So to young and not so young scientists out there I’d ask you to write in bona fide, please. Be concise. Be convincing. Be thorough and be critical. This is science we are doing, not stamp collecting. It shouldn’t be about getting all sorts of things out there, it is about expanding the knowledge of the human race one paper at a time. But we are humans; therefore we are flawed. More and more cases of scientific misconduct are found throughout the literature and nowadays, with the speed of blogging and tweeting, we can point at too many of them. The role of bloggers in pointing this frauds, of which I’ve written before here, is the subject of recent controversy and possibly the topic of a future post. We are all being scrutinized in our work but that shouldn’t be an excuse to make up data, tinker or temper with it, to push our own personal agendas or to gain prestige in an otherwise wild academic environment.

I for one may never publish in Science or Nature; I may never be selected for any important prize, but even the promise of achieving any of those is not worth the guilt trip of lying to an entire academic society. I try then, to always remember that science is not about getting the best answers, but about posing the right questions.

What is your own style for reading papers? Any criticism to my style? How different is the style of a grad student from that of a researcher?

As usual thanks for reading, rating and commenting!

Summer internships are Over


For the last five weeks we had guests in our lab coming from different places of the country: Tepic (west), León (Center) and Mexico City (Right in the middle!). During those five weeks they worked in the field of computational chemistry helping our research efforts with a couple of drug carrying molecules. They learned about computational chemistry and drug design; about wavefunctions and density functionals; about population analysis and vibrational frequency analysis. Dead hours were a bit complicated to handle because the convergence of each calculation takes some time and, as opposed to a wet-chemistry lab, I couldn’t just ask them to purify starting materials or distillate solvents. A question to other theoretical/computational chemists: What could I have asked young undergrad students (with backgrounds ranging from engineering to pharmacy) to do during those dead hours? What did I do wrong? Anyway, they manage to spend a good time since they all got along quite well.

Now they are back to their hometowns getting ready for the congress, hosted by the same organization that awarded them the stipend to come and spend their summer with us (The Dolphin Program / Programa Delfín) as well as to going back to school in a few more weeks. I asked* them to write a guest post for the blog telling their experience, which is presented below. Thanks to you all for choosing our lab to get your internship this summer!

Javier Camacho (Mexico City)

Javier_Delfin_2013Hi, I’m Javier from ESIQIE-IPN
The dolphin program has given me the opportunity to experience how is to be in a high-level scientific research. Login to CCIQS next to the imminent Dr. Joaquin Barroso Flores, left me a pleasant experience. The great contribution that gives this line of research has allowed me to meet new horizons, beyond the area of engineering, to which I belong.
The theoretical chemistry and computational chemistry together, are a great weapon to develop virtual optimizations that allow us to find drug transport agents, without making the vast amount of laboratory tests that are required. Explaining that this is one of the many applications that can be used.
To undertake this experience has left me very satisfied, be guiding a person who likes his work and want to show what he knows, it makes me very happy. After these long weeks of work and perseverance, with certainty affirm the interesting and productive it is to be part of the investigation in Mexico.
I thank the Dolphin Program, gives CCIQS the UAEM-UNAM and Dr. Joaquin for opening the doors to this great opportunity to start my story as a researcher.

 

Paulina Pintado (Tepic, Nayarit)

la fotoHi my name’s Paulina and I came as part of Dolphin Research Program that gives the opportunity of participates in a real work of investigation with a professional at the topic. In this occasion I came to work with Ph.D. Joaquin Barroso in a small project of his line of research; namely theoretical drug carriers design. In this six weeks besides to learn more aspects about my career, in this case Theoretical Chemistry applied to pharmaceutical industry; I tested the experience of travel to another town just by myself, live with people from different parts of the country with distinct customs and visit few places of the town.
This summer will always be memorable ‘cause this internship is an important event for my professional experience and also for my personal development and I hope many others students have the courage to try get into the world of scientific research.
So just remains for me to thank to Ph.D. Joaquin Barroso for giving me the chance to do this internship in his lab I hope you continue having success in your work, I feel pretty glad to met him and my others research’s mates.

 

 

Daniel Carteño (Mexico City)

Ey my name’s  Daniel and this summer of  2013  i had been the opportunity to do a research  internship in Toluca under P.H.D. Joaquin Barroso, and during this period of time I´ve learnt a bit about His research work, not only this is  an important experience for my educational history, but it also is for my personal life. Learnt about theoretical chemistry open my vision of this discipline, because when I thought about chemistry I´ve never imagine a computational laboratory, this the most important part, nowadays the researches have been removed due to  they are so expensive and finally the conclusion  is not expected, when you use a super computer like me and my work team used, it doesn’t matter if you have a mistake  or do something wrong, only you have to write again the keywords and the only thing you spend is time. Even in Mexico theoretical chemistry is not famous in my opinion is a useful work tool. This research internship was highly satisfactory and hope do it again i´m glad

*Their contributions were completely voluntary and no editing of their original texts has been made.

Summer Internships


This week has been a happy one since four new additions to our staff have been made, at least for the summer, that is. Paulina, Eliana, Javier and Daniel have come to our lab from various different towns across the nation to spend six weeks working hard in small projects related to our lines of research; namely theoretical drug carriers design. This time the drug under study is known as GTP or 3-phenyl(1H-[1]benzofuro[3,2]pyrazole and calixarenes will once again act as the potential carriers.

20130626-122705.jpg

Left to Right: Daniel, Javier, Paulina and Eliana
(Summer Interns – 2013)

They all came as part of the Dolphin Research Summer Program (link in Spanish only) in which college students spend a few weeks doing research in the lab of their choosing. This is the first time I participate as a tutor and I find it a great opportunity for young students to get familiar with certain aspects of science they wont learn inside school.

So far these past three days have been quite intense with them learning how to edit and submit a Gaussian calculation in a Linux environment. I’ve already taught them about geometry optimizations, frequency analysis, (natural) population analysis and Fukui reactivity indices calculation. There is much more to learn still, of course, but so far so good. I believe the major drawback so far has been their own eagerness since they’d like to have all the data imediately! Unfortunately they’ll have to wait for their initial calculations to converge. We started this week by doing some simple analysis of all the properties described above for the Cytosine-Guanine base pair at the B97D/6-31+G(d,p) level of theory. Luckily their calculation crashed promptly, and I find that lucky because that gave me the opportunity to teach them how to relaunch a failed calculation, which, unfortunatelly will happen more often than not.

So, welcome guys! Thanks for choosing this lab for doing your internships. I hope you find our research interesting and motivating, may this be the first step into a full time research career. Also, kudos to the Dolphin Staff for helping promote science in young Mexican students. Stay tuned for a guest post from all of them once they finish their time here.

RealTimeChem week 2013 #RealTimeChem


RealTimeChem, in its first week-long edition, is coming to your Twitter feed next Monday April 22nd 2013, and I for one intend to participate.

I look forward to this event in order to get in touch with other chemists, not only theoretical but experimental ones as well, around the world sharing a passion for chemistry and technology. I guess most of the participants will be experimental chemists who will amaze us with their videos and pictures of cool looking reactions; I hope we, here at our computational lab, are up to the challenge with our calculations.

Participating is really simple, just Tweet as little or as much as you want to share about your work or studies around chemistry under the #RealTimeChem hastag and follow @RealTimeChem. There is also a group and an event set up on Facebook, check those out too. As I write this, its Friday at 8:oo PM and I’m still in the office, which means I have a lot of work to do, therefore I don’t feel like writing about all the details of the event, specially when others have done so in a much more eloquently fashion: Check out these posts (as well as the entire content of their blogs, they’re very cool!) by Dr. Galactic and The Organic Solution for all the details about the event’s mechanics and, yes, even prizes to the best tweets.

So get on board and tweet all week long under the #RealTimeChem hashtag  and share your work with the world the way no journal will ever do: in real time and with the uttermost embarrassing methodology honesty.

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