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New Fabricatio Industrial VPN router  n Method Improves Efficiency of Perovskite Solar Cells

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A new fabrication method enabled researchers to make larger perovskite cells with few defects, resulting in higher efficiency. Image: Brown University/NREL

Scientists from Brown University and the National Renewable Energy Laboratory have developed a method for making perovskite cells larger while maintaining efficiency.

Using a newly developed fabrication method, a research team has attained better than a 15-percent energy conversion efficiency from perovskite solar cells larger than one square centimeter area. The researchers, from Brown University and the National Renewable Energy Lab (NREL), have reported their findings in the journal Advanced Materials.

Perovskites, materials with a particular crystalline structure, have caused quite a buzz in the solar energy world. Perovskite solar cells are relatively cheap to make, and the efficiency with which they can convert sunlight into electricity has been increasing rapidly in recent years. Researchers have reported efficiency in perovskite cells of higher than 20 percent, which rivals traditional silicon cells. Those high efficiency ratings, however, have been achieved using cells only a tenth of a square centimeter — fine for lab testing, but too small to be used in a solar panel.

“The use of tiny cells for efficiency testing has prompted some to question comparison of perovskite solar cells with other established photovoltaic technologies,” said Nitin Padture, professor of engineering at Brown, director of Brown’s Institute for Molecular and Nanoscale Innovation, and one of the senior authors of the new research. “But here we have shown that it is feasible to obtain 15-percent efficiency on cells larger than a square centimeter through improved processing. This is  m2m vpn  real progress.”

Maintaining high efficiency on larger perovskite cells has proved to be a challenge, Padture says. “The problem with perovskite has been that when you try to make larger films using traditional methods, you get defects in the film that decrease efficiency.”

The fabrication process that the Brown and NREL researchers reported in this latest paper builds on a previously reported method developed by Yuanyuan Zhou, a graduate student in Padture’s lab. Perovskite precursors are dissolved in a solvent and coated onto a substrate. Then the substrate is bathed in a second solvent (called anti-solvent) that selectively grabs the precursor-solvent and whisks it away. What’s left is an ultra-smooth film of perovskite crystals.

In this new study Zhou and Mengjin Yang, a postdoctoral researcher at NREL, developed a trick to grow the perovskite crystals to a larger size. The trick is to add excess organic precursor that initially “glues” the small perovskite crystals and helps them merge into larger ones during a heat-treatment, which then bakes away the excess precursor.

“The full coverage and uniformity over a large area come from the solvent method,” Padture said. “Once we have that coverage, then we increase the size of the crystals. That gi Industrial 3G Router  ves us a film with fewer defects and higher efficiency.” The 15- ethernet  percent efficiency reached in this latest work is a good start, Padture said, but there’s still room to improve. Ultimately, he would like to reach 20 to 25 percent in large-area cells, and he thinks that mark could be within reach using this method or a similar one.

Padture and colleagues at the University of Nebraska–Lincoln were recently awarded a $4-million grant by the National Science Foundation to expand their perovskite research.

Other authors on the paper were Yining Zeng, Chun-Sheng Jiang, and Kai Zhu of NREL. The work was supported by the U.S. Department of Energy (DE-AC36-08-GO28308 and DE-FOA-0000990) and the National Science Foundation (DMR-1305913).

Publication: Mengjin Yang, etla., “Square-Centimeter Solution-Processed Planar CH3NH3PbI3 Perovskite Solar Cells with Efficiency Exceeding 15%,” Advanced Materials, 2015; DOI: 10.1002/adma.201502586

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National GH m2m vpn  G 2010 Greenhouse Gas Emissions Data

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The 2010 GHG data was released today and for the first time data from large facilities is easily accessible to the public. The GHG report has data on over 6,700 facilities that can be sorted and viewed by facility, location, industrial sector, and the type of GHG emitted when using the EPA’s online publication tool.

WASHINGTON – For the first time, comprehensive greenhouse gas (GHG) data reported directly from large facilities and suppliers across the country are now easily accessible to the public through EPA’s GHG Reporting Program. The 2010 GHG data released today includes public information from facilities in nine industry groups that directly emit large quantities of GHGs, as well as suppliers of certain fossil fuels.

“Thanks to strong collaboration and feedback from industry, states and other organizations, today we have a transparent, powerful data resource available to the public,” said Gina McCarthy, assistant administrator for EPA’s Office of Air and Radiation. “The GHG Reporting Program data provides a critical tool for businesses and other innovators to find cost- and fuel-saving efficiencies that reduce greenhouse gas emissions, and foster technologies to protect public health and the environment.”

EPA’s online data publication tool allows use cellular router  rs to view and sort GHG data for calendar year 2010 from over 6,700 facilities in a variety of ways—including by facility, location, industrial sector, and the type of GHG emitted. This information can be used by communities to identify nearby sources of GHGs, help businesses compare and track emissions, and provide information to state and local governments.

GHG data for direct DIN-Rail router   emitters show that in 2010:

•Power plants were the largest stationary sources of direct emissions with 2,324 million metric tons of carbon dioxide equivalent (mmtCO2e), followed by petroleum refineries with emissions of 183 mmtCO2e.

•CO2 accounted for the largest share of direct GHG emissions with 95 percent, followed by methane with 4 percent, and nitrous oxide and fluorinated gases accounting for the remaining 1 percent.

•100 facilities each reported emissions over 7 mmtCO2e, including 96 power plants, two iron and steel mills and two refineries.

Mandated by the FY2008 Consolidated Appropriations Act, EPA launched the GHG Reporting Program in October 2009, requiring the reporting of GHG data from large emission sources across a range of industry sectors, as well as suppliers of products that would emit GHGs if released or combusted. Most reporting entities submitted data for calendar year 2010. However, an additional 12 source categories will begin reporting t remote connectivity  heir 2011 GHG data this year.

Access EPA’s GHG Reporting Program Data and Data Publication Tool.

Image: EPA

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Scien low-cost cellular router   tists Change the Color of Gold

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The colors of the gold were changed to spell out “Nano Meta” – pictured here through a microscope. Image Southampton University

Scientists in Southampton, UK, are now able to change the color of gold, which could have applications in jewelry-making and security features.

The scientists published their findings in the Journal of Optics. The technique used by the scientists involv automation  es embossing tiny raised or indented patterns on the metal’s surface, altering the way that it absorbs or reflects light, thus changing its color to the naked eye.

A researcher uses one of the nano-fabrication machines used in the process. Image: Southampton University

Nikolay Zheludev, who leads the nanophotonics and metamaterials research team at Southampton University, states that gold can now be made red or green or a multitude of other hues.

This process of nano-embossing could be applied to other metals, like silver or aluminum. The shape, height, and depth of the embossed patterns determines how light behaves when it hits the metals, and what colors are perceived.

The researchers state that this is the first time the visible color of metal has been changed in this manner. The colors of objects are determined by how light interacts with them. By embossing metals with patterns only around 100 nanometers across, the scientists have found a way to control which wavelengths of ligh Industrial LTE router  t the metal absorbs and reflects. Vending Telemetry  

[via BBC]

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New Research Opens magento themes   Graphene Band-Gap

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This is a schematic representation for the formation of BCN-graphene via solvothermal reaction between carbon tetrachloride (CCl4) boron tribromide (BBr3) and nitrogen (N2) in the presence of potassium (K). Photograph is of the autoclave after the reaction, showing the formation of BCN-graphene (black) and potassium halide (KCl and KBr, white). Credit: UNIST

Researchers from UNIST have developed a method for mass producing boron/nitrogen co-doped graphene nanoplatelets, opening the door for future use in electronic devices.

Ulsan National Institute of Science and Technology (UNIST) announced a met industrial LTE router  hod for the mass production of boron/nitrogen co-doped graphene nanoplatelets, which led to the fabrication of a graphene-based field -effect transistor (FET) with semiconducting nature. This opens up opportunities for practical use in electronic devices.

The Ulsan National Institute of Science and Technology (UNIST) research team led by Prof. Jong-Beom Baek have discovered an efficient method for the mass production of boron/ni wireless m2m  trogen co-doped graphene nanoplatelets (BCN-graphene) via a simple solvothermal reaction of BBr3/CCl4/N2 in the presence of potassium. This work was published in “Angewandte Chemie International Edition” as a VIP (“Very Important Paper”).

Since graphene was experimentally discovered in 2004, it has been the focus of vigorous applied research due to its outstanding properties such as high specific surface area, good thermal and electrical conductivities, and many more properties.

However, its Achilles heel is a vanishing band-gap for semiconductor application. As a result, it is not suitable for logic applications, because devices cannot be switched off. Therefore, graphene must be modified to produce a band-gap, if it is to be used in electronic devices.

This is a schematic representation for the formation of BCN-graphene via solvothermal reaction between carbon tetrachloride (CCl4) boron tribromide (BBr3) and nitrogen (N2) in the presence of potassium (K). Credit: UNIST

Various methods of making graphene-based field effect transistors (FETs) have been exploited, including doping graphene, tailoring graphene-like a nanoribbon, and using boron nitride as a support. Among the methods of controlling the band-gap of graphene, doping methods show the most promise in terms of industrial scale feasibility.

Although world leading researchers have tried to add boron into graphitic framework to open its band-gap for semiconductor applications, there has not been any notable success yet. Since the atomic size of boron (85 pm) is larger than that of carbon (77 pm), it is difficult to accommodate boron into the graphitic network structure.

A new synthetic protocol de UMTS router  veloped by a research team from UNIST, a leading Korean university, has revealed that boron/nitrogen co-doping is only feasible when carbon tetrachloride (CCl4 ) is treated with boron tribromide (BBr3 ) and nitrogen (N2) gas.

In order to help boron-doping into graphene structure, the research team used nitrogen (70 pm), which is a bit smaller than carbon and boron. The idea was very simple, but the result was surprising. Pairing two nitrogen atoms and two boron atoms can compensate for the atomic size mismatch. Thus, boron and nitrogen pairs can be easily introduced into the graphitic network. The resultant BCN-graphene generates a band-gap for FETs.

“Although the performance of the FET is not in the ranges of commercial silicon-based semiconductors, this initiative work should be the proof of a new concept and a great leap forward for studying graphene with band-gap opening,” said Prof. Jong-Beom Baek.

“I believe this work is one of the biggest advancements in considering the viability of a simple synthetic approach,” said Ph.D. candidate Sun-Min Jung, the first author of this article.

Prof. Baek explains the next step: “Now, the remaining challenge is fine-tuning a band-gap to improve the on/off current ratio for real device applications.”

Publication: Jung, S.-M.; Lee, E.-K.; Shin, D.; Jeon, I.-Y.; Seo, J.-M.; Jeong, H.-Y.; Park, N.; Oh, J.-H.; Baek, J.-B. “Direct Synthesis of BCN Graphene via Solvothermal Reaction of CCl4/BBr3 under Nitrogen” Angewandte Chemie International Edition 2013, accepted as a VIP paper. (in press)

Image: UNIST

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[inhandnetworks-blog]

Neutron Scattering Experiments Reveal New Quantum Properties digital signage   of H2O and H2

www.inhandnetworks.com

New neutron scattering experiments reveal the existence of quantum selection rules in molecules and could open the door to new insights about the quantum properties of molecules by providing a unique testing ground for quantum theory.

Neutron scattering experiments at the Institute Laue-Langevin (ILL) have uncovered the first known quantum selection rule in molecules, a law of nature that prevents certain transitions between different quantum states.

The experiments were carried out on endofullerenes, molecules of C60 into which smaller molecules of Hydrogen (H2) had been inserted. The results, published in Physical Review Letters, represent the first known example of a quantum selection rule found in a molecule.

Similar techniques were also used by the same team to uncover an exciting new symmetry-breaking interaction of water molecules with C60 cages.

The use of fullerenes such as C60 to trap smaller molecules, using cutting-edge molecular surgery techniques, was pioneered over the last decade. A complex series of chemical reactions is needed to open an orifice in the C60 cage which allows the smaller molecule to be inserted at high pressures to form a sealed structure that resembles a baby’s rattle. The resulting complex provides a &l vending telemetry  squo;nanolaboratory’ environment ideal for examining the trapped molecule via spectroscopic techniques.

By exposing the samples to a continuous beam of neutrons, the energy levels of the molecular complex can be accurately determined. The use of neutrons is ideal for experiments of this kind owing to their fundamental magnetic spin, which allows them to drive a wider range of transitions than would be possible with photons.

The neutron scattering experiments conducted with a mixture of ortho and para hydrogen show automation  ed that a number of forbidden transitions from the para-H2 ground state were systematically absent from the resultant spectra. This confirmed the existence of a molecular selection rule, a discovery which runs counter to the widely held view that such molecular compounds are not subject to any selection rules.

Prof Mark Johnson, who contributed Industrial IoT Gateway   to the experimental work undertaken at ILL, said “This is a fantastic example of an international collaboration to study a unique sample of which only tens of milligrams exist worldwide. The Japanese first learned how to open up C60, and the collaboration with researchers in New York gave an improved understanding of these quantum systems. Tiny quantities of the sample were exposed to the world’s highest neutron flux at the ILL in experiments that would not have been possible some years ago.”

He added “The experiments provide a way of isolating hydrogen in what is effectively a spherical environment, whose symmetry makes the theoretical calculations a great deal easier. Such well-defined systems, which have not existed to date, provide an excellent test bed for quantum theory.” Similar experiments conducted with forms of H2O known as ortho- and para- water also revealed a previously undiscovered splitting of the ortho-H2O ground state, pointing to a symmetry-breaking interaction which arises when the molecules are isolated in the C60 cages. Whether the molecular confinement or a set of longer range interactions is responsible for the observed symmetry breaking is a topic of considerable interest and one worthy of further research.

Publication: John-Mark A. Allen, “Treating time travel quantum mechanically,” Phys. Rev. A 90, 042107, 2014; doi:10.1103/PhysRevA.90.042107

PDF Copy of the Study: Treating Time Travel Quantum Mechanically

Image: Darren Whittingham

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[inhandnetworks-blog]

MIT Engineers Develop Coated Tissue 3G 4G LTE   Scaffolds That Help Stimulate New Bone Growth

www.inhandnetworks.com

Pictured is a scanning electron micrograph of a porous, nanostructured poly(lactic-co-glycolic acid) (PLGA) membrane. The membrane is coated with a polyelectrolyte (PEM) multilayer coating that releases growth factors to promote bone repair. Image courtesy of Nasim Hyder and Nisarg J. Shah

Chemical engineers from MIT have developed coated tissue scaffolds that help the body grow new bone to repair injuries or congenital defects.

MIT chemical engineers have devised a new implantable tissue scaffold coated with bone growth factors that are released slowly over a few weeks. When applied to bone injuries or defects, this coated scaffold induces the body to rapidly form new bone that looks and behaves just like the original tissue.

This type of coated scaffold could offer a dramatic improvement over the current standard for treating bone injuries, which involves transplanting bone from another part of the patient’s body — a painful process that does not always supply enough bone. Patients with severe bone injuries, such as soldiers wounded in battle; people who suffer from congenital bone defects, such as craniomaxillofacial disorders; and patients in need of bone augmentation prior to insertion of dental implants could benefit from the new tissue scaffold, the researchers say.

“It’s been a truly challenging medical problem, and we have tried to provide one way to address that problem,” says Nisarg Shah, a recent PhD recipient and lead author of the paper, which appears in the Proceedings of the National Academy of Sciences this week.

Paula Hammond, the David H. Koch Professor in Engineering and a member of MIT’s Koch Institute for Integrative Cancer Research and Department of Chemical Engineering, is the paper’s senior author. Other authors are postdocs M. Nasim Hyder and Mohiuddin Quadir, graduate student Noémie-Manuelle Dorval Courchesne, Howard Seeherman of Restituo, Myron Nevins of the Harvard School of Dental Medicine, and Myron Spector of Brigham and Women’s Hospital.

Stimulating bone growth

Two of the most i automation  mportant bone growth factors are platelet-derived growth factor (PDGF) and bone morphogenetic protein 2 (BMPindustrial multi sim cellular router-2). As part of the natural wound-healing cascade, PDGF is one of the first factors released immediately following a bone injury, such as a fracture. After PDGF appears, other factors, including BMP-2, help to create the right environment for bone regeneration by recruiting cells that can produce bone and forming a supportive structure, including blood vessels.

Efforts to treat bone injury with these growth factors have been hindered by the inability to effectively deliver them in a controlled manner. When very large quantities of growth factors are delivered too quickly, they are rapidly cleared from the treatment site — so they have reduced impact on tissue repair, and can also induce unwanted side effects.

“You want the growth factor to be released very slowly and with nanogram or microgram quantities, not milligram quantities,” Hammond says. “You want to recruit these native adult stem cells we have in our bone marrow to go to the site of injury and then generate bone around the scaffold, and you want to generate a vascular system to go with it.”

This process takes time, so ideally the growth factors would be released slowly over several days or weeks. To achieve this, the MIT team created a very thin, porous scaffold sheet coated with layers of PDGF and BMP. Using a technique called layer-by-layer assembly, they first coated the sheet with about 40 layers of BMP-2; on top of that are another 40 layers of PDGF. This allowed PDGF to be released more quickly, along with a more sustained BMP-2 release, mimicking aspects of natural healing.

“This is a major advantage for tissue engineering for bones because the release of the signaling proteins has to be slow and it has to be scheduled,” says Nicholas Kotov, a professor of chemical engineering at the University of Michigan who was not part of the research team.

The scaffold sheet is about 0.1 millimeter thick; once the growth-factor coatings are applied, scaffolds can be cut from the sheet on demand, and in the appropriate size for implantation into a bone injury or defect.

Effective repair

The researchers tested the scaffold in rats with a skull defect large enough — 8 millimeters in diameter — that it could not heal on its own. After the scaffold was implanted, growth factors were released at different rates. PDGF, released during the first few days after implantation, helped initiate the wound-healing cascade and mobilize different precursor cells to the site of the wound. These cells are responsible for forming new tissue, including blood vessels, supportive vascular structures, and bone.

BMP, released more slowly, then induced some of these immature cells to become osteoblasts, which produce bone. When both growth factors were used together, these cells generated a layer of bone, as soon as two weeks after surgery, that was indistinguishable from natural bone in its appearance and mechanical properties, the researchers say.

“Using this combination allows us to not only have accelerated proliferation f managed switch  irst, but also facilitates laying down some vascular tissue, which provides a route for both the stem cells and the precursor osteoblasts and other players to get in and do their jobs. You end up with a very uniform healed system,” Hammond says.

Another advantage of this approach is that the scaffold is biodegradable and breaks down inside the body within a few weeks. The scaffold material, a polymer called PLGA, is widely used in medical treatment and can be tuned to disintegrate at a specific rate so the researchers can design it to last only as long as needed.

Hammond’s team has filed a patent based on this work and now aims to begin testing the system in larger animals in hopes of eventually moving it into clinical trials.

This study was funded by the National Institutes of Health.

Publication: Nisarg J. Shah, et al., “Adaptive growth factor delivery from a polyelectrolyte coating promotes synergistic bone tissue repair and reconstruction,” PNAS, 2014; doi: 10.1073/pnas.1408035111

Image: Nasim Hyder and Nisarg J. Shah

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[inhandnetworks-blog]

Jupiter’s Great Red Spot – low cost cellular router   Just a Sunburn?

www.inhandnetworks.com

Jupiter’s Great Red Spot. The feature’s clouds are much higher than those elsewhere on the planet, and its vortex nature confines the reddish particles once they form.

Using a combinati low cost cellular router on of data from Cassini’s December 2000 Jupiter flyby and laboratory experiments, new research suggests effects of sunlight produce the color of Jupiter’s Great Red Spot.

The ruddy color of Jupiter’s Great Red Spot is likely a product of simple chemicals being broken apart by sunlight in the planet’s upper atmosphere, according to a new analysis of data from NASA’s Cassini mission. The results contradict the other leading theory for the origin of the spot’s striking color — that the reddish chemicals come from beneath Jupiter’s clouds.

The results were presented earlier this month by Kevin Baines, a Cassini team scientist based at NASA’s Jet Propulsion Laboratory, Pasadena, California, at the American Astronomical Society’s Division for Planetary Science Meeting in Tucson, Arizona. Baines and JPL colleagues Bob Carlson and Tom Momary arrived at their conclusions using a combination of data from Cassini’s December 2000 Jupiter flyby and laboratory experiments.

In the lab, the researchers blasted ammonia and acetylene gases — chemicals known to exist on Jupiter — with ultraviolet light, to simulate the sun’s effects on these materials at the extreme heights of clouds in the Great Red Spot. This produced a reddish material, which the team compared to the Great Red Spot as observed by Cassini’s Visible and Infrared Mapping Spectrometer (VIMS). They found that the light-scattering properties of their red concoction nicely matched a model  grid LTE router  of the Great Red Spot in which the red-colored material is confined to the uppermost reaches of the giant cyclone-like feature.

“Our models suggest most of the Great Red Spot is actually pretty bland in color, beneath the upper cloud layer of reddish material,” said Baines. “Under the reddish ‘sunburn’ the clouds are probably whitish or grayish.” A coloring agent confined to the top of the clouds would be inconsistent with the competing theory, which posits that the spot’s red color is due to upwelling chemicals formed deep beneath the visible cloud layers, he said. If red material were being transported from below, it should be present at other altitudes as well, which would make the red spot redder still.

Jupiter is composed almost entirely of hydrogen and helium, with just a sprinkling of other elements. Scientists are interested in understanding what combinations of elements are responsible for the Industrial router  hues seen in Jupiter’s clouds, as this would provide insights into the giant planet’s make-up.

Baines and colleagues initially set out to determine if the Great Red Spot’s color might derive from sun-induced breakdown of a more complex molecule, ammonium hydrosulfide, which makes up one of Jupiter’s main cloud layers. They quickly found that instead of a red color, the products their experiment produced were a brilliant shade of green. This surprising negative result prompted the researchers to try simple combinations of ammonia with hydrocarbons that are common at Jupiter’s high altitudes. Breaking down ammonia and acetylene with ultraviolet light turned out to best fit the data collected by Cassini.

The Great Red Spot is a long-lived feature in Jupiter’s atmosphere that is as wide as two earths. Jupiter possesses three main cloud layers, which occupy specific altitudes in its skies; from highest to lowest they are: ammonia, ammonium hydrosulfide and water clouds.

As for why the intense red color is seen only in the Great Red Spot and a few much smaller spots on the planet, the researchers think altitude plays a key role. “The Great Red Spot is extremely tall,” Baines said. “It reaches much higher altitudes than clouds elsewhere on Jupiter.”

The team thinks the spot’s great heights both enable and enhance the reddening. Its winds transport ammonia ice particles higher into the atmosphere than usual, where they are exposed to much more of the sun’s ultraviolet light. In addition, the vortex nature of the spot confines particles, preventing them from escaping. This causes the redness of the spot’s cloud tops to increase beyond what might otherwise be expected.Other areas of Jupiter display a mixed palette of oranges, browns and even shades of red. Baines says these are places where high, bright clouds are known to be much thinner, allowing views to depths in the atmosphere where more colorful substances exist.

Image: NASA/JPL-Caltech/ Space Science Institute

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[inhandnetworks-blog]

Children Exposed to Nicotine in Utero Have Lower Read durpal webdesign  ing Scores

www.inhandnetworks.com

A newly published study found that on average children exposed to high levels of nicotine in utero scored 21 percent lower in areas such as reading speed, single-word identification, spelling, accuracy, real and non-word reading, and reading as compared to classmates born to non-smoking mothers.

Yale School of Medicine researchers have found that children born to mothers who smoked more than one pack per day during pregnancy struggled on tests designed to measure how accurately a child reads aloud and comprehends what they read.

The findings are published in the current issue of The Journal of Pediatrics.

Lead author Dr. Jeffrey Gruen, professor of pediatrics and genetics at Yale School of Medicine, and colleagues analyzed data from more than 5,000 children involved in the Avon Longitudinal Study of Parents and Children (ALSPAC), a large-scale study of 15,211 children from 1990-1992 at the University of Bristo m2m communication  l in the United Kingdom.

Gruen and his team from Yale and Brock University in Canada, compared performance on seven sp routers  ecific tasks – reading speed, single-word identification, spelling, accuracy, real and non-word reading, and reading comprehension – with maternal cigarette smoking, after adjusting for socioeconomic status, mother-child interactions, and 14 other potential factors.

They found that on average, children exposed to high levels of nicotine in utero — defined as the minimum amount in one pack of cigarettes per day — scored 21 percent lower in these areas than classmates born to non-smoking mothers. The children were tested at age seven and again at age nine.

Among students who share similar backgrounds and education, a child of a smoking mother will, on average, be ranked seven places lower in a class of 31 in reading accuracy and comprehension ability.

“It’s not a little difference — it’s a big difference in accuracy and comprehension at a critical time when children are being assessed, and are getting a sense of what it means to be successful,” said Gruen, who also points out that the effects of smoking in pregnancy are especially pronounced in children with an underlying phonological (i.e., speech) deficit, suggesting an interaction between an environmental exposure (smoking) and a highly heritable trait (phonological ability).

“The interaction between nicotine exposure and phonology suggests a significant gene-by-environment interaction, making children with an underlying phonological deficit particularly vulnerable,” he said.

Other authors on the study include Kelly Cho, Jan C. Frijters, Heping Zhang, and Laura L. Miller.

The study was funded by The UK Medical Research Council; the Wellcome Trust; the National Institutes of Health R01NS43530 (J.R.G.), R Dual SIM M2M router 01DA016750 (H.Z.) and T32 MH014235 (K.C.); and the University of Bristol provided core support for ALSPAC.

Image: Maternity and cigarette from Shutterstock

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