Posts

March 19, 2015

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10:41 PM | Herbal Incense
If you've never seen 'herbal incense', here it is...3 grams of 'incense' containing synthetic cannabinoids in a glass bottle.Digital image taken by ForensicToxGuy (2015). Feel free to use the image if you'd like. It's not very good.
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9:54 PM | pH and sig figs
In a quick addition to this post and this post, here’s a note about pH and significant figures. Firstly the ‘rule’. When taking the log of a number that is expressed in scientific notation (as hydrogen and hydroxide ion concentration often will be), the number of significant figures in the mantissa of the number, are […]
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9:50 PM | Significant figures on the AP Chemistry exam
What’s the deal? Good question! As far as I am aware (happy to be corrected), there has never been a clear, written policy on this matter from the College Board – yet ANOTHER failure to communicate; AP Chemistry Czar anyone? However, there was a ‘unwritten’ and ‘understood’ rule in place for many years, that a […]
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8:53 PM | The Chemistry of Poisons – Thallium, ‘The Poisoner’s Poison’
Having already looked at arsenic and cyanide in the previous instalments in this series, our attention turns to thallium, another famed poison. Thallium perhaps doesn’t share quite the same profile as arsenic and cyanide, but despite this it’s perhaps an even more effective compound in poisonings. This graphic looks at its history and effects. Thallium […]
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8:47 PM | 10 things that your AP Chemistry teacher may have taught you….
….that won’t be on the AP exam. For years I have been banging on about what I consider to be the strange practice of calling a course ‘AP Chemistry’, and then delivering content that won’t be on the exam – I’ve never understood it, and never will. My argument has always been this; why not […]
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8:22 PM | Plasmonic ceramic materials key to advances in nanophotonics for extreme operational conditions
rogress in developing nanophotonic devices capable of withstanding high temperatures and harsh conditions for applications including data storage, sensing, health care and energy will depend on the research community and industry adopting new 'plasmonic ceramic' materials.
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5:22 PM | Superconductivity breakthroughs - Cuprates earn their stripes
The latest breakthrough answers a key question on the microscopic electronic structure of cuprate superconductors, the most celebrated material family in our quest for true room-temperature superconductivity.
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5:16 PM | Chemjobber is a music fan who uses dental precision topology to create exponential growth of crowding out in new partnerships
Vox has a "buzzwordy" job description generator. Here's a few that I liked:Chemjobber is a shaman who uses whiteboards to create atomic explanations of increasing in post-zombie invasion societies. Chemjobber is a reject who uses democratic revolutions to create unique visions of birthing in maintaining the patriarchy. Chemjobber is a music fan who uses ancient Sumerian poetry to create unique visions of metric analysis in big data. Chemjobber is a creative artist who uses your […]
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5:14 PM | Why high-fat, low-carb diets help some epileptics
Antiepileptic drugs don’t work for one-third of patients. Instead, those patients usually eat ketogenic diets, high in fat and low in carbohydrates, which somehow stops seizures. In a paper just out in Science, researchers report how ketogenic diets work at the molecular level and say they designed a new drug that mimics the molecular effects […]
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5:14 PM | Sharper nanoscopy
What happens when a quantum dot looks in a mirror?
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5:09 PM | Scientists invent new way to control light, critical for next gen of super fast computing
A device resembling a plastic honeycomb yet infinitely smaller than a bee's stinger can steer light beams around tighter curves than ever before possible, while keeping the integrity and intensity of the beam intact.
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5:03 PM | Spot treatment with nanotechnology
Researchers use the latest in nanotechnology and transdermal drug delivery to take on an old problem: Acne.
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4:34 PM | Annihilation of Extremely Halophilic Archaea in Hide Preservation Salt Using Alternating Electric Current
Salt contains extremely halophilic archaea and these microorganisms degrade leather quality. The aim of this study is to find an effective treatment system to kill these microorganisms in salt used in hide brine curing. Ten salt samples were obtained from Tuz Lake, Turkey, and the total cell counts of extremely halophilic archaea, proteolytic and lipolytic extremely halophilic archaea were determined. Two sets of experiments were designed to detect the inactivation impact of alternating […]
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4:30 PM | “Handbook of Advanced Methods and Processes in Oxidation Catalysis: From Laboratory to Industry”
“Handbook of Advanced Methods and Processes in Oxidation Catalysis”, edited by Daniel Duprez and Fabrizio Cavani, aims to give an overview of catalytic oxidation methods. It is divided in two parts, covering total and selective oxidation, and draws on the experience of a number of academic and industrial scientists. It is a broad and generally useful book which fulfils its aims, being intended for the technical parts of the chemical industry as well as the academic community. This […]
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3:32 PM | Modeling how cells move together could inspire self-healing materials (w/video)
Modelling the motion of cells moving together may help scientists design new technologies inspired by nature, such as self-healing materials in batteries and other devices.
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2:48 PM | 3-D Printing has a New Competitor
I won't be so bold as to say that 3-D printing as we know it died on Monday [1], but it certainly took a good body blow (open access article after registration). Take a look at this video and you decide:Pretty neat, huh?That this is a UV-cured acrylate may not be overly surprising. By judicious choices in the monomers and photoinitiators, acrylates can cure pretty quickly. But the big question is how is the curing controlled to create such detailed topologies? 2-Photon absorption is one option, […]
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2:10 PM | Ask CJ: good online resources for unemployed chemists?
From the inbox, a question from CZ (this has been redacted for privacy and clarity): I finished my Ph.D. in [2012-2014] at a good school, with a great advisor (in terms of personality and his contributions to the field). I’m a [redacted] spectroscopist, and I did work on [redacted]. The work was really interesting, but very slow (I made all my own peptide samples, etc.) and I only ended up with three papers, and just one is a 1 first-author paper.  Immediately after I finished […]
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12:32 PM | Click! That's how modern chemistry bonds nanoparticles to a substrate
Nanoparticles of various types can be quickly and permanently bonded to a solid substrate, if one of the most effective methods of synthesis, click chemistry, is used for this purpose.
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12:26 PM | Scientists watch quantum dots 'breathe' in response to stress
Researchers watched nanoscale semiconductor crystals expand and shrink in response to powerful pulses of laser light. This ultrafast 'breathing' provides new insight about how such tiny structures change shape as they start to melt - information that can help guide researchers in tailoring their use for a range of applications.
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12:21 PM | Volunteers for Viagra
Guest post by Rowena Fletcher-Wood It was the 1990s, and drug giant Pfizer Laboratories were on the trail of an elusive angina medication to relieve constricted blood vessels and lower blood pressure. Pharmaceutical chemists in Sandwich, UK, were focussing their efforts on NO- (nitric oxide) releasing drugs, a highly reactive radical that expands blood vessels and [...]
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12:21 PM | Researchers use shearing method to create nanofiber 'gusher'
Creating large amounts of polymer nanofibers dispersed in liquid is a challenge that has vexed researchers for years. But engineers have now reported a method that can produce unprecedented amounts of polymer nanofibers, which have potential applications in filtration, batteries and cell scaffolding.
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11:30 AM | #Chemsafety programming at #ACSDenver
The 249th ACS National Meeting starts on Sunday in Denv […]Related Posts:Chemical and laboratory safety at #ACSIndy#Chemsafety at #ACSDallas#Chemsafety at #ACSSanFranChemical and laboratory safety at #ACSNOLAChemical and laboratory safety at #ACSPhilly
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11:24 AM | My new preprint is up
As part of their undergraduate training, our students are required to write a short thesis. Usually, due to the paucity of research funding, their theses take the format of a literature review. A few years ago, however, I proposed a computational study to the student I had been assigned. Despite no previous acquaintace with the subject, she eagerly took the task and performed some computations on possible reaction mechanisms of the organomercurial lyase MerB. She only had the time to compute a […]
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10:59 AM | Peering into how nanoparticle electrodes in rechargeable lithium-ion batteries work
Nanoparticle electrodes in lithium-ion batteries have both near-surface and interior contributions to their redox capacity, each with distinct rate capabilities. Using combined electron microscopy, synchrotron X-ray methods and ab initio calculations, scientists have investigated the lithiation pathways that occur in NiO electrodes.
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10:38 AM | Finding an affordable way to use graphene is the key to its success
Graphene is a remarkably strong material given it's only a single carbon-atom thick. But finding ways to do something with it - that's also affordable too - has always been a challenge.
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10:30 AM | Quantum computing: one step closer with defect-free logic gate
Developing a new approach to quantum computing, based on braided quasi-particles as a logic gate to speed up computing, first requires understanding the potential error-inducing factors.
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8:29 AM | Fast molecular cargo transport by diffusion
In new work, researchers have utilized diffusion as an effective transport mechanism for DNA nanotechnology. These findings contribute a new aspect to be considered for the design of future DNA motors, molecular machines, and nanorobots as they provide a simple way to transport molecules over distances of potentially several 100 nm; which is much faster than when using conventional DNA walkers or motors, which make many small and slow steps.
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8:23 AM | Breast implants could become safer thanks to nanopatternd surface
Scientists have created an enhanced surface for silicone breast implants which could reduce complications and make them less likely to be rejected by the body.

March 18, 2015

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11:28 PM | log, ln, units and activities
Honestly, I don’t pretend to be a good math student – in fact quite the opposite is true – so me trying to explain the niceties of transcendental functions (that’s what logs are, you know?) and such, is unlikely to end in either happiness or accuracy. Having said that, thanks to a lunchtime conversation with […]
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7:23 PM | Buckyballs become bucky-bombs
New creation could one day be used for demolition of cancer cells.
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