Search

The occurrence of fluorotelomer alcohols (FTOHs) was investigated in 94 food-contact materials (FCMs). We detected 6:2 FTOH (<0.60--1110 ng/g), 8:2 FTOH (<0.40--8490 ng/g), and 10:2 FTOH (<0.02--9350 ng/g) in most FCM samples, and four longer-chain C14-20 FTOHs were, for the first time, identified in FCMs with relatively high concentrations (<0.02--8450 ng/g for 12:2 FTOH, <0.02--1640 ng/g for 14:2 FTOH, <0.02--372 ng/g for 16:2 FTOH, and <0.02--130 ng/g for 18:2 FTOH). There were three typical profiles of FTOHs that were dominated by 6:2 FTOH (95.6 ± 8.1% in 9 FCMs), 8:2 FTOH (50.9 ± 20.8% in 22 FCMs), and 10:2 FTOH (44.5 ± 20.9% in 30 FCMs), indicating the congener-specific usage of FTOHs for different commercial purposes. All nine detectable FCMs produced in the United States were dominated by 6:2 FTOH, which was significantly different from those produced in China. The median concentration of total FTOHs in eco-friendly paper tableware was 2990 ng/g, which was lower than in popcorn bags (18 200 ng/g) but much higher than other FCMs (<0.55--38.7 ng/g). FTOHs could migrate from paper bowls, with migration efficiencies of 0.004--0.24% into water, 0.004--0.24% into 10% ethanol, 0.009--2.79% into 30% ethanol, 0.06--13.0% into 50% ethanol (v/v) simulants, and 0.04--2.28% into oil. Migration efficiencies decreased with increasing carbon chain lengths of FTOHs. [ABSTRACT FROM AUTHOR]

The printing press helped to spread literacy, civic discourse, and even political dissent in colonial America. Without paper, however, the invention of the moveable type printing press would have been insignificant. This crucial communication medium was hobbled by a critical shortage of the raw material needed for printed matter. Paper was in short supply in the colonies and in the new nation as it could only be made from rags, and there was constant difficulty in obtaining enough rags to keep the presses rolling. Pleas for this essential ingredient were constantly seen in the newspapers in early America and there were severe shortages of both paper and the rags from which it was made during the American Revolution. This article examines how desperate were the early Americans for the paper which was necessary both for firing the muskets and for spreading the rhetoric of Revolution. [ABSTRACT FROM PUBLISHER]

In the early twentieth century, American newspapers enjoyed high circulations while presenting readers with diverse and plentiful content. After 1920, radio broadcasting made even more information available for public consumption, giving audience members an abundant range of media choices. During a time of plenty for readers and listeners, companies in the business of media struggled with the opposite problem: scarcity. As the amount of media content proliferated, the practical ability to disseminate it was determined by the access to scarce resources, and this was true for both radio broadcasting and newspaper publishing. In many respects, the history of the American mass media in the early twentieth century might best be told as a tale of two scarcities, one—the electromagnetic spectrum—defined by absolute limits and the other—the newsprint—defined by access to markets for a particular material, the supply of which often fluctuated in availability and price. [ABSTRACT FROM PUBLISHER]

Abstract: In school, at least in the US, we were taught to multiply by hand according to a standard algorithm. Most people find that algorithm difficult to use, and many children fail to learn it. We propose a new way to make sense of this difficulty: to treat explicit computation as perceptually supported physical and mental action. Based on recent work in neuroscience, we trace the flow of arithmetic information to emphasize demands on visual working memory and attention. We predict that algorithms that make moderate demands on memory and attention will work better than others that make stronger demands. We suggest that the judicious use of spatial schemas can reduce such cognitive demands. Experimental evidence from children in an inner-city school supports this claim. Our work suggests new ways to think about instruction. The goal should be to minimize demands that present obstacles and maximize instead what human eyes, bodies, and brains do well. [Copyright &y& Elsevier]

Abstract: This paper estimates the effects of humidity and temperature on mortality rates in the United States (c. 1973–2002) in order to provide an insight into the potential health impacts of climate change. I find that humidity, like temperature, is an important determinant of mortality. Coupled with Hadley CM3 climate-change predictions, I project that mortality rates are likely to change little on the aggregate for the United States. However, distributional impacts matter: mortality rates are likely to decline in cold and dry areas, but increase in hot and humid areas. Further, accounting for humidity has important implications for evaluating these distributional effects. [Copyright &y& Elsevier]

The Rediscovered Map Collection of the John Hay Library offers vivid examples of mapmaking and map use in the United States from 1800 to 1920. This collection testifies to the changing technology and diversifying demands that made maps more available throughout this epoch. Libraries often have hidden treasures of this material, uncataloged and unknown to the community. With some organization and commitment, Americana paper maps can be arranged into a vibrant collection. We break down this epoch into 30-year periods to analyze the tremendous changes that occurred and how they impact libraries today. [ABSTRACT FROM AUTHOR]

The connections between forest products operations and water resources in the United States is considered and, where possible, quantified. Manufacture of wood, pulp, and paper products and the influences of forest management and forest products manufacture on water quality are discussed. Most fresh water in the US originates in forested areas. Responsible harvesting strategies, best management practices, and forest re-growth combine to minimize or eliminate changes in water availability and degradation of water quality due to harvesting. Relative to alternative land uses and large-scale disturbance events, forested areas produce the highest quality of fresh water. Water inputs for the manufacture of forest products total about 5.8 billion m3 per year, an amount equal about 0.4% of the surface and groundwater yield from timberland. Approximately 88% of water used in manufacturing is treated and returned directly to surface waters, about 11% is converted to water vapor and released during the manufacturing process, and 1% is imparted to products or solid residuals. Extensive study and continued monitoring of treated effluents suggest few or no concerns regarding the compatibility of current effluents with healthy aquatic systems. [ABSTRACT FROM AUTHOR]

Abstract: Kenaf (Hibiscus cannabinus L.) is a nonwoody fiber source with many uses. To evaluate the dry matter yield potential of kenaf at two locations in the southern High Plains of the USA and the effects of late planting/late emergence as a possible replacement for hail damaged cotton, four varieties were grown in 2004 and 2005 at New Mexico State University''s Agricultural Science Centers at Clovis, under limited irrigation, and Tucumcari, under rainfed conditions. Each study was a randomized complete block design having four replicates. A year×location interaction existed (P <0.0469) for kenaf yield largely due to precipitation amount and distribution. Either late planting or late emergence due to low soil moisture at planting significantly reduced yields (3.62 vs. 0.63Mgha−1 for mid-May planting and emergence and early July emergence or planting, respectively, P <0.0001). Consequently, kenaf would not be suitable for recovering input costs when planted after failure of cotton. The very late maturing variety Gregg had consistently lower numeric yields than Dowling, Everglades 41, and Tainung 2 in all comparisons, with the strongest trend within the emergence date comparison (P <0.0912). Kenaf varieties should be selected for any location that finish blooming approximately three to four weeks prior to the average first autumn freeze to allow for maximum growth. [Copyright &y& Elsevier]

The article offers news briefs related to the plastic film industry in the U.S. Cleveland, Ohio-based Freedonia Group Inc. has issued a report which shows plastics exceeding paper in packaging demand in the U.S. by 2012. The September 2008 issue of "Plastics Engineering" featured an article on advances in blown film technology. Freedonia Group predicted that demand for specialty films in the country will approach 7.6 billion dollars in 2012.

In recent years, computer-based testing (CBT) has grown in popularity, is increasingly being implemented across the United States, and will likely become the primary mode for delivering tests in the future. Although CBT offers many advantages over traditional paper-and-pencil testing, assessment experts, researchers, practitioners, and users have expressed concern about the comparability of scores between the two test administration modes. To help provide an answer to this issue, a meta-analysis was conducted to synthesize the administration mode effects of CBTs and paper-and-pencil tests on K-12 student reading assessments. Findings indicate that the administration mode had no statistically significant effect on K-12 student reading achievement scores. Four moderator variables—study design, sample size, computer delivery algorithm, and computer practice—made statistically significant contributions to predicting effect size. Three moderator variables—grade level, type of test, and computer delivery method—did not affect the differences in reading scores between test modes. [ABSTRACT FROM AUTHOR]

The article focuses on several classroom activities that prompt students to investigate and discover mathematical formulas in determining the areas of shapes through the use of dot papers. It is said that students in the U.S. are rarely provided with chance to find out the formulas for themselves. Several mathematical problems on finding areas on dot paper are presented.

The article reflects on the issue on plant science in Korea. It reveals that the theory on country's scientific focus was not transparent to the people involved in the research. It presents an analysis with the participation of top ten countries including Northern America, Europe, Japan, and Australia. It succumbs that the countries in Asia are smaller than those mentioned above with respect to research publication other than Japan. It explains that Korea and China have increased the number of papers being published annually which out put is equaled with Brazil.

Discusses various studies that investigated the influence of colored paper on the response-rate to mail surveys in the U.S. Response-rates to surveys and questionnaires using differently colored paper; Scores from the meta-analyses of the colors separately and their statistical significance; Variables possible in the design and presentation of printed surveys and questionnaires.

Purpose – The purpose of this article is to encourage public librarians to reconsider the future value of their paper book collections. Design/methodology/approach – The author interacts with developing trends to make an argument for supporting paper book collections in the digital age. Findings – The liquidation of Borders Group Inc. provides the public library with an opportunity to market its paper collections to publishers and paper book buyers. Originality/value – The article offers a contrarian perspective on the enduring value physical book collections will play in the digital age. [ABSTRACT FROM AUTHOR]

The article offers news briefs of magazine issues, Web sites and research. Wal-Mart Stores Inc. has excluded 1,000 magazines' titles at it stores to increase profitability. "The Denver Business Journal" report the untruthfulness of the issue about the buying of the three free Metro International SA papers by Philip Anschutz's newspaper company. TNS Media Intelligence research reveals the 4.2% expected increase of the overall advertising finance in the U.S. for 2008.

The article focuses on a study, entitled "Paper Versus Plastic in Packaging," by the Freedonia Group. The study reports that plastic is expected to increase its share to 53 percent by 2010 in the 18 competitive markets in the U.S. It notes that plastic's competitive cost and performance advantages will enable it to make further inroads in almost all of the markets studied.

Reports on the goal to eliminate the use of legal-size paper, including in the federal courts in the U.S. Costliness and inefficiency of legal-size paper and files; Storage problems of legal files that put record keeping in a critical situation; Amount spend by Federal Supply Service on the paper per year.

The article reviews several creative web sites for the classroom including the SunWise Toolkit from the U.S. Environmental Protection Agency (EPA) located at www.epa.gov/sunwise/toolkit.html, Incompetech: Customizable Online Graph Paper located at http:/incompetech.com/graphpaper/ and Where's my Water.

The author reflects on which high-value commodity could be put forward for the 100th Jubilee spot in the U.S. as of July 2012. He believes the link between an anniversary and the particular commodity associated with it could be proportional to the item's value, such as paper, cotton and leather celebrating the first five years. He is proposing oil, which has reached a price of around 100 U.S. dollars per barrel (bbl), to have that 100th Jubilee spot.

Highlights the application of genetic engineering in altering a key gene in aspen trees in the United States. Percentage of lignin reduction achieved by researchers at Michigan Technological University; Use of lignin; Effect of genetic engineering to the height of trees.

This article focuses on all the papers submitted at the Third International Fructan Symposium held at the Utah State University Campus in Logan, USA, from July 21 to July 24, 1996. As for the previous symposium, all aspects of the physiology, biochemistry, chemistry and molecular biology of fructans in plants and micro-organisms were covered in a series of reviews and research presentations. On this occasion, however, only research papers were considered for publication by "The New Phytologist," resulting in a volume, which gives a comprehensive and detailed account of current research in this area.