Jump to 0 top | 1 navigation | 2 content | 3 extra information (sidebar) | 4 footer | 5 toolbar


Content

Restoring a maize root signal that attracts insect-killing n...

J?rg Degenhardta,1,2, Ivan Hiltpoldb,1, Tobias G. K?llnera,2, Monika Freyc, Alfons Gierlc, Jonathan Gershenzona, Bruce E. Hibbardd, Mark R. Ellersiecke and Ted C. J. Turlingsb,3

aMax-Planck Institute for Chemical Ecology, Hans-Kn?ll-Strasse 8, D-07745 Jena, Germany;
bUniversity of Neuchatel, Institute of Biology, Fundamental and Applied Research in Chemical Ecology, Case Postale 158, CH-2009 Neuchatel, Switzerland;
cLehrstuhl für Genetik, Technische Universit?t München, Am Hochanger 8, D-85350 Freising, Germany;
dUnited States Department of Agriculture–Agricultural Research Service Plant Genetics Research Unit, 205 Curtis Hall, University of Missouri, Columbia, MO 65211; and
eAgricultural Experiment Station, 307E Middlebush Hall, University of Missouri, Columbia, MO 65211

When attacked by herbivorous insects, plants emit volatile compounds that attract natural enemies of the insects. It has been proposed that these volatile signals can be manipulated to improve crop protection. Here, we demonstrate the full potential of this strategy by restoring the emission of a specific belowground signal emitted by insect-damaged maize roots. The western corn rootworm induces the roots of many maize varieties to emit (E)-β-caryophyllene, which attracts entomopathogenic nematodes that infect and kill the voracious root pest. However, most North American maize varieties have lost the ability to emit (E)-β-caryophyllene and may therefore receive little protection from the nematodes. To restore the signal, a nonemitting maize line was transformed with a (E)-β-caryophyllene synthase gene from oregano, resulting in constitutive emissions of this sesquiterpene. In rootworm-infested field plots in which nematodes were released, the (E)-β-caryophyllene-emitting plants suffered significantly less root damage and had 60% fewer adult beetles emerge than untransformed, nonemitting lines. This demonstration that plant volatile emissions can be manipulated to enhance the effectiveness of biological control agents opens the way for novel and ecologically sound strategies to fight a variety of insect pests.

  • No ratings
  • No ratings
  • No ratings
  • No ratings
  • No ratings
  • 0 ratings

International Biochemical Congress in 2009 held in Shanghai

No. 21 Session of the International Union of Biochemistry and Molecular Biology Academic Conference and the 12th Asian and Oceanian Biochemists and Molecular Biologists Congress (referred to as the International Biochemical Congress in 2009) August 2 at the Shanghai International Convention Center kicked off .

     Began in 1949, held once every three years, the General Assembly of the international chemical and biological, <a href=http://www.gfschemicals.com/ >Chemical</a> and biological areas is the largest and the highest academic level of the General Assembly, so far 20 sessions have been held. Asia only India and Japan held the. China's successful 2003 bid to host the session of the General Assembly, this is the first time the General Assembly held an international chemical and biological.

     In the future during the week-long conference, attended by 3,000 Chinese and foreign scholars to explore protein structure and dynamics, genome dynamics and gene regulation, cell signal transduction network, molecular disease research in the field of hot topics and cutting-edge show the forefront of life science research.

     The General Assembly has invited more than 160 in their respective areas of research scientists have made outstanding contributions, including four Nobel laureates at the meeting so the report, a total of 36 thematic sessions, and in Hangzhou, Guangzhou, Xi'an, held three Satellite Meeting.

     Biochemical this international theme of "biological molecules, so that a better life", by the Chinese of Biochemistry and Molecular Biology and Cell Biology Institute of the Chinese co-sponsored Chinese Academy of Sciences, Shanghai Institutes for Biological Sciences, Biochemistry and Cell Biology Institute co.

  • No ratings
  • No ratings
  • No ratings
  • No ratings
  • No ratings
  • 0 ratings

90,000 Chinese children become "little BASF chemists"

Shanghai Xinhua news channel ming reported July 31: by the international chemical giant BASF's first interactive teaching and learning activities "BASF chemists little" before landing once again in Shanghai, through the fun of the chemical experiment to school-age children and the spread of innovation the concept of sustainable development.

This is a "small BASF chemists" to enter its eighth year in China. Since 2002, the first time since the success so far, more than 9 children were 6-12 years old chemistry experiment to be done by hand opportunity to experience the fun of the chemical world. "BASF chemist small" By way of entertaining, let the kids explore the magic of the natural sciences, but also understand the importance of environmental protection.

A total of 30 officers from more than 60 local community-based primary Shanghai, Shanghai Chemical Industrial Zone of children around the primary to participate in the opening ceremony. This year's "Little BASF chemist" activities for a total of four children, the safety design of chemical experiments, of which the "magic blue" and "paper chromatography" is the first time in the domestic launch.

Management Board Chairman of BASF Greater China, Kwan said, "BASF chemist small" only in helping children to create a better future to prepare the hope that through this education activities to develop children's creative thinking and the concept of sustainable development.
  • No ratings
  • No ratings
  • No ratings
  • No ratings
  • No ratings
  • 0 ratings

Chemical version of "Blue and White Porcelain" Popular in th...

   素胚勾勒出青花笔锋浓转淡

  无色酚酞面对碱羞涩脸绯红

  “素胚勾勒出青花笔锋浓转淡,瓶身描绘的牡丹一如你初妆……”

JAY's "blue and white", it was sang as a "colorless phenolphthalein alkaline shy face to face crimson, purple, blue alkaline litmus encountered slow fade out ... ..." you say enough well done? A few days ago, a "chemical version of Blue and White Porcelain"Popular major forum posts. An unknown chemical teachers, the "Blue and White Porcelain" in the wording of the lyrics to chemistry and passion in the classroom performance, not only welcomed by students, the relevant screen even after the on-line a lot of friends shouted, "tough "!

China Wind JAY song "Blue and White Porcelain" Once launched, it has become a hot point of KTV to sing songs, many people are very like this song. However, the networks have a strange world, a chemistry teacher recently the "Blue and White Porcelain" lyrics into the chemical-related words, the classroom became a "living textbook." Yesterday's news very quickly find this online video, pre-screen blackboard hung a piece of curtain, with the music sounded familiar, were reflected screen subtitles. When I began to imitate those who, immediately make any music. "Phenolphthalein colorless alkali shy face to face crimson, purple, blue alkaline litmus encountered slow fade out, the pH and salt ion solution into the water to leave the metal with acid and hydrogen ... ..." are all related to chemical-related knowledge , had been the powerful new form of imitators. In this video can only see two students curtain, non-stop laughter, and the concert has not been to see the shadow.

For this video, a vivid expression of the language so that users are screaming fun, especially school students, it is strange feeling. "Well, ah, I saw this video immediately after the impulse has been to study chemistry!" "I do not how to face such cattle chemistry teacher?" "Too talented, and this is the real fun ah ! "" was able to encounter such a teacher, the chemical will not learn the bad! "Of course, the reporter found it posted a small number of students raised on some different views on the lyrics. Such as "splash sulfuric acid dip washed skin immediately, Mr sodium bicarbonate," that does not have students, in the case of concentrated sulfuric acid should be wiped with a dry cloth, copious amount of water flushing. However, this video, many teachers find it very interesting. "It is a good thing, the whole song on the formulation of the principle of different types of chemical 99% is correct." Preferred to remain anonymous, a chemistry teacher, told reporters, "This song is the most rare because of chemical changes in the expression of --- could be the way to sing pop songs! "Dean of Education, Sichuan Normal University, Yu eternal that this recreation is a good teaching methods, classroom atmosphere can be mobilized, the students in a humorous, relaxed environment learn faster and remember more knowledge in prison.

It is understood that the first 14th in Hangzhou, paste it on the secondary star, is now rapidly sweeping the major forums, websites, become friends, especially the favorite students. Subsequently, there are users saying that it was Taishan City, Guangdong Province, a chemistry teacher in order to help students understand the memory, extracting the characteristics of various chemical elements and the creation. The chemistry teacher on the "astonishing move", JAY music companies are also very generous杰威尔, namely, that it does not hurt Daya. "The chemistry teacher quite admire the talent, before there are many songs Jelloun as a text. This will allow you to listen to the" Blue and White Porcelain, "a beautiful melody to learn chemistry, very interesting!" Music杰威尔responsible told reporters.

"Blue and White Porcelain chemical version of" part of the lyrics
  白色絮状的沉淀 跃然试管底

  铜离子遇氢氧根 再也不分离

  当溶液 呈金黄色 因为铁三钾

  浅绿色二甲亚铁把人迷

  电石偷偷去游泳 生成乙炔气

  点燃后变乙炔焰 高温几千几

  逸散那二氧化碳

  石灰水点缀白色沉底

  苯遇高锰酸钾 变色不容易

  甲苯上加硝基 小心TNT

  在苯中的碘分子紫色多美丽

  就为萃取埋下了伏笔

  电解池电解质 通电阴阳极

  化合价有高低 电子来转移

  ……

  • No ratings
  • No ratings
  • No ratings
  • No ratings
  • No ratings
  • 0 ratings

A chinese student affiliated Olympic gold medal by the Inter...

Yi Liu is a popular river Xiangtan people. He said the family is very democratic, no matter small or early or middle school, parents will seek and respect his views. Was reading the middle school affiliated to Hunan Normal University, is the idea of holding their own. LI Li-wen Liu teacher coach, Liu Ji is the day learning the 2-3 times teachers.

Liu has been previously sent to the Peking University.

  • No ratings
  • No ratings
  • No ratings
  • No ratings
  • No ratings
  • 0 ratings

Drink from plastic bottles can raise the body’s levels of a...

Drink from plastic bottles can raise the body’s levels of a controversial ‘gender-bending’ chemical by more than two thirds, according to news.

Experts have been concerned about the possible health effects of bisphenol A (BPA) - an everyday chemical used in many plastic food and drink containers and tins as well as clear baby bottles - which is officially classified as toxic in some countries.

A study found that participants who drank for a week from polycarbonate bottles showed a 69 per cent increase in their urine of BPA, which mimicsthe female sex hormone oestrogen.

Researchers did not say how much liquid was drunk per day. Researchers from Harvard School of Public Health studied 77 students, who had first undergone a seven-day ‘washout’ phase in which they drank all cold beverages from stainless steel bottles in order to minimise BPA exposure.

They were then given two polycarbonate bottles and asked to drink all cold beverages from them during the next week. Previous studies have suggested that high levels of BPA consumption are linked to birth defects, growth problems and an increased risk of heart disease and diabetes.

In particular there are fears that heating the bottles, as parents would do when warming their baby’s milk, causes the chemical to leak in potentially dangerous quantities into the liquid contained within.

The senior author of the latest study, Karin B. Michels, associate professor of epidemiology at HSPH and Harvard Medical School, said: "We found that drinking cold liquids from polycarbonate bottles for just one week increased urinary BPA levels by more than two-thirds."

"If you heat those bottles, as is the case with baby bottles, we would expect the levels to be considerably higher. This would be of concern since infants may be particularly susceptibleto BPA’s hormone gland-disrupting potential." Canada banned the use of BPA in polycarbonate baby bottles last year and some manufacturers have voluntarily eliminated it from their products.

Most adults carry BPA in their bodies but expert opinion on the risks is divided. The European Food Safety Authority believes that people naturally convert the chemical into less harmful substances in the body.

Previous studies had found that BPA could leach from polycarbonate bottles into their contents, but this study - published in US journal Environmental Health Perspectives - is the first to show the size of the corresponding increase in urinary BPA concentrations in humans.

Harvard researcher Jenny Carwile said: ‘While previous studies have demonstrated that BPA is linked to adverse health effects, this study fills in a missing piece of the puzzle - whether or not polycarbonate plastic bottles are an important contributor to the amount of BPA in the body.’

  • No ratings
  • No ratings
  • No ratings
  • No ratings
  • No ratings
  • 0 ratings

DARCO Activated Carbon from GFS Chemicals

GFS now offers DARCO Activated Carbon products in small quantities.
DARCO G-60 is a steam activated carbon produced from a proprietary raw material. Its purity and excellent adsorptive capacity make it ideal for treating fine chemicals and pharmaceutical intermediates.
DARCO 4X12 is an acid washed granular activated carbon produced by steam activation of lignite coal. This grade is specifically manufactured for applications requiring high throughput in pressure columns. DARCO 4X12 is a general purpose granular carbon used in a variety of applications including the purification of fine chemicals, food, and water
DARCO 12X20 is an acid washed granular activated carbon produced by steam activation of lignite coal. This activated carbon is specifically manufactured for applications requiring rapid adsorption rate in pressure columns. DARCO 12X20 is a general purpose activated carbon used in a variety of applications including purification of fine chemicals and food.
DARCO 12X40 is an acid washed granular activated carbon produced by steam activation of lignite coal. This grade is specifically manufactured for applications requiring rapid adsorption rate in percolation columns. DARCO 12X40 is a general purpose granular carbon grade used in a variety of applications including purification of fine chemicals and food.
DARCO 20X40 is a fine mesh granular activated carbon specifically manufactured for applications requiring rapid adsorption rate in percolation columns. This grade is produced by steam activation of lignite coal followed by an acid wash to remove soluble salts, providing greater product purity. DARCO 20X40 is a general purpose GAC grade used in a variety of applications including purification of fine chemicals and foods.
DARCO KB-G is excellent for the purification of highly colored and /or foaming process liquids in the food, chemical, and pharmaceutical industries. DARCO KB-G combines a superior adsorptive capacity with good filtration characteristics. It is especially effective in adsorbing high molecular weight organics such as large color bodies and proteins, at low carbon dosage rates. DARCO KB-G is produced by chemical activation of wood using the phosphoric process.
Norit Americas offers over 150 different varieties of activated carbon to ensure the precise fit for your application.
NORIT RO 0.8 is an extruded carbon, suitable for a wide range of applications in the food, chemical and bulk pharmaceutical industries. NORIT RO 0.8 has a particle shape, which gives an extremely low hydrodynamic pressure drop in liquid phase applications. Its unique pore size distribution and superior hardness make NORIT RO 0.8 particularly suitable for decolorization of cane sugar syrup. NORIT RO 0.8 can be thermally reactivated.
For more information contact service@gfschemicals.com or call 800-858-9682.

By GFS chemicals -www.gfschemicals.com

  • No ratings
  • No ratings
  • No ratings
  • No ratings
  • No ratings
  • 0 ratings
Pages: 1 (1 - 7 / 7)