Carbon nanotubes may have the same risk of asbestos

“Day by creating” an environment issue 7, 2008 Featured Articles published in the carbon nanotubes on human health effects reported. The first line in the product development need to reach people who need to pay attention to carbon: carbon nanotubes and asbestos is likely to have the same risk. Front-line staff, please be careful with caution to avoid inhaling.

The author is not to deny the new carbon nanotube materials. On the contrary, the author makes a high-strength materials, semiconductors, fuel cells have great quality and the possibility of very high expectations. Therefore, in addition to the advantages only hope that the reader, but also see the shortcomings of this material. Hope to establish safe storage and use of carbon nanotubes “risk management” approach to expand the scope of application of carbon nanotubes.

“Day by creating” story published in Japan, introduced the National Institute of Drug Safety Food Hygiene Research Centre biological toxicity test results the Department. See Journal of experimental conditions, in the experiment, when the mice come in contact with multi-layer carbon nanotubes, the higher the incidence of mesothelioma. The results suggest that carbon nanotubes may be as dangerous as asbestos.

However, for this experiment, for the following reasons: (1) subjects with the “p53 deficient mice *”; (2) is not input by the mouth, but the carbon nanotubes directly into the peritoneal; (3) a large number of inputs, so some experts said the results need to carefully look at. In fact, I first learned that the experimental results, we also hold the same concerns. However, I consulted the Minister of the Institute toxic Kanno pure, I feel that this experiment in “Toxicology” the fact is very reasonable. Kanno Minister explained below.

” (On (1) and (2)) past experience, out of recognition of a substance hazardous (dangerous, hazardous) for the purpose, and assumed that the material would cause mesothelioma cancer, intraperitoneal injection test with significant. carcinogenesis mechanism from view, p53 deficient mice are considered suitable for predicting mesothelioma cancer samples. ” ” (On (3)), we intend to launch a study on the toxicity of the maximum dose. If this dose failed to cause cancer, then the substance is completely ‘safe’. Conversely, if the asbestos material with the same positive reaction to produce the same kind of tumor, then enough to doubt its ‘harmful’. ”

Indeed, Kaolv to the actual De work environment, work conducted in input, that were put into the mouth, then, can be further Tigao right Renti the impact of speculation O’clock in the Jing Du. But this experiment requires long time. By contrast, Kanno Minister and others pay more attention to the timeliness of warnings, choose to harm in the short term to confirm the experimental conditions. As expected, the results did not identify the “innocent.” Conclusion is that “carbon nanotubes and asbestos-containing the same shape / size of the particles, there are significant risks. In labor management and product development need to pay attention to prevent inhalation.”

I have previously introduced, asbestos induced mesothelioma for two main reasons. One of asbestos from the nose and mouth inhalation, will along the respiratory tract and bronchial deep into the lungs, to reach the air and blood oxygen, carbon dioxide in alveolar gas exchange. Of course, there is a variety of body defense mechanisms, enabling foreign body removed from the body together with the saliva, etc., but asbestos is invalid. This is because the asbestos is slender and small. Another reason is that the asbestos can not be dissolved, and has been retained in the body. In general, alveolar outside pH 7.4, weakly alkaline, and alveolar macrophages of the enzyme pH 4.8, was strongly acidic. In other words, the material can not withstand such strong acid chemical dissolution, it may persist in the body.

In summary, because of asbestos danger, “slender”, “insoluble.” And not in its chemical composition. Anti-speaking, as long as the asbestos is so “slim”, “insoluble” materials, there is the same as the risk of asbestos. In the multi-layer carbon nanotubes, µm-sized fibrous or rod-like particle is the case.

Kanno Minister also ongoing experiments to answer questions raised by the author. Kanno Minister said that in the present experiment, the amount of carbon nanotubes put down to the previous experiments 1 / 10, 1 / 100, 1 / 1000. Although the results can not open, but in all the experiments, the mice appeared mesothelioma.

Via: Carbon nanotubes may have the same risk of asbestos

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Mysterious “lithium Night”

Mysterious “Night of lithium”, invite you to jointly opened the “hijab” in the moment!

South lithium forthcoming fourth set of professional and academic forums in one speech to Chinese and foreign experts and scholars as the main content of the main construction the necessary arrangements for the solemn atmosphere of seriousness.

But all is not the forum for all, by no means certain and Technology Forum, “boring,” “boring” and other words associated. To 23 at the opening of the evening, a lack relaxed and warm, imbued with a little romance and even the “Night of lithium cocktail”, will be located in the central area of Futian, Shenzhen Golden Central Hotel, 6th floor held.

Soothing chamber music, a gorgeous colored embellishment various Chinese and foreign drinks, fine European pastries, light chips to the guest side of the thin cross Pinza in taste, while patrolling the total did not forget Suo old friends not seen for a long time, do not forget and new friends, exchanging business cards.

This is a main target of lithium gathering of people, an enlarged salon. But in reality it is not just that, made a special trip to attend the reception in the Ministry of Information Industry and SME Division leaders, the Secretary Ministry of Science and high-tech leaders, as well as the Mayor of Shenzhen Municipal People’s Government and the relevant Secretary, Vice Mayor We, the SME board in the creation of 6 fitness anniversary reception for people to leave this to send on the GEM and the state support for private enterprises to establish scientific and technological innovation policy interpretation; reception, of course, the most eye-catching role in those far do from the “House” Academy of lithium with foreign giants; In addition, the reception also attracted to the domestic communications, electronics and materials, mobile devices and other areas of business CEO who attended, has established manufacturers including TCL, Skyworth, Foxconn, Changhong, Jin, high novelty, UT Starcom, dragon flags, the Department of Science Xin, Ai Muke and a number of famous domestic and foreign manufacturers and their solution provider. Obviously, there will be a lot of money amount of lithium downstream to join the hospitality industry friends gathered to do online notebook, mobile phone and Bluetooth in the production, power production and car dealers, and even planning to engage in industry funds, venture capital, securities and insurance business financial professionals. Many industries that deal with the needs and lithium, to the strategic alliance with the lithium industry, who will seize this rare valuable opportunity to cocktail parties as a platform, searching, planning a career off of the new cooperation opportunities.

A bit mysterious “Night of lithium,” an imaginative people, you do not want to look forward to reveal the beauty of the bride together “hijab” it? !

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Fuel cell electric bicycle

January 5 reports: Along with the “Water and Sustainable Development” as the theme of the 2008 World Expo closing of Spain, the Chinese fuel cell products in the international arena, the successful debut also drew the curtain.

Impression in people’s past, the fuel cell is more of a veiled high-tech products, very green, very advanced, but still far from practical. A company called climbing the emergence of hydrogen energy industry to change this situation. Has now developed a series of fuel cell products, and has applied to the tour buses, bicycles, portable power and other occasions.

Bottlenecks due to technical restrictions, the domestic fuel cell in the past mostly as a demonstration purpose. Even if only as an occasional sample sales, and not a batch. The climbing equipment, the fuel cell industry, 21 electric bicycle export to Spain. Fuel cells and fuel cell products, though the sample is only one word, but the meaning is very different. As the product not only satisfied with the work to stabilize, and must have the durability, practicality, cost, appearance and other aspects as well as considerations. In addition for different markets, the relevant certification was necessary.

The export volume fuel cell products is another important significance lies in its purely domestic! This not only refers to the bicycle body also includes a key raw material in fuel cells: catalyst, membrane, carbon paper and the localization of bipolar plates. In which the catalyst and membrane by climbing industry independent research and development and production. Long been neglected domestic raw materials in the practical proof of its outstanding performance in par with international similar products. At the same time the localization of key materials, so often been criticized for the cost of fuel cells can be effectively controlled. Since most of the past, the key raw material to be imported, which makes the cost of the fuel cell control was clutched in the hands of foreign companies, the stakes just look at China’s IT industry will be able to get some idea. As foreign enterprises to master the most upstream CPU technology, most IT enterprises has become an overseas Chinese enterprises assembly plant and the client, the price level determined entirely by the upstream firm.

Because these products excellent performance in Spain, climbing industry, the company’s Spanish and Italian partner is actively planning for vehicles driven on public roads in the matter, in 2009 there will be more Chinese-made fuel cell products in Europe.

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Japan to develop liquid crystalline organic semiconductor

RIKEN and other institutions, said a press release recently, researchers have developed both high capacity and good electron transport properties of liquid crystal forming processing of organic semiconductors.

Press said that the main use of the past, semiconductor silicon and other inorganic materials, but in recent years, developing flexibility and good use of light and a new type of semiconductor organic materials are of great concern.

Press said the new material in the production of organic thin-film solar cells and transistors so very promising.

Complaints from the public: the purchase of electric vehicle battery problem more

In accordance with the relevant provisions of the date of commencement of three packs of battery electric vehicles should be purchased from the date of invoice

Electric vehicles with its moderate prices and lightweight, gaining more and more consumers. With the gradual increase of electric vehicles, the electric cars also on the rise of consumer disputes. Last week, in the city center received 12,315 complaints and reports of complaints, promises electric car batteries reach the mileage and battery three packs of hot issues such as complaints.

October 22, east of Wang reflect March of this year, she bought a new electric car, was introduced this electric car business is not only beautiful, but powerful lasting, and committed on a single charge can travel 60 km. Wang found that car was manual also states that a charge may be added the line 60 kilometers, can actually run only 30 kilometers. She found the business, requires a new business to replace the battery yourself, but businessmen say, the electric car is sold in March, but production date marked on the battery in the past year, calculated in accordance with the battery manufacture date, Ms. Wang has been the battery Warranty period, so the merchant refused to give her a new battery.

October 24, Shahe Lee reflected, she bought an electric car, the battery in warranty period repair 2 times, the last time to repair up to two months, again in a few days when the battery can not charge problems in need of repair, the merchant told her that electric vehicles have been the three packs of batteries, if you want to pay maintenance needs.

To this end, the city center to remind the 12,315 complaints and reports that some businesses to battery production date as of the date of commencement of three packs of batteries to shorten the battery’s actual period of three packs, three packs of obligations to reduce its commitment of time. In accordance with “part of the replacement of returned goods repair liability” provisions of Article VIII of the “Three Guarantees valid from the date of invoice” date of commencement of three packs of battery electric vehicles should be purchased from the invoice date. In addition, some businesses for the three packs of batteries are often not charged the battery of the repair time, and in accordance with the provisions of three bags, three bags of time shall be deducted by businesses repair and spare parts for repairs take time. Consumers can calculate their own extended the deadline after the three packs. Maintenance requirements of each business consumers fill out and keep maintenance records, and obtain formal invoice when in the car, so in the event of disputes in a timely manner after three packs of rights.

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Lithium Battery and Hybrid cars

The New York Mercantile Exchange, August crude oil futures prices for delivery in July 3 145 U.S. dollars a barrel, the highest recorded. In this week, OPEC weekly average oil prices to new highs. In fact, for some time, high oil prices and the resulting series of political and economic and social issues deeply hurt the car manufacturer. In the United States, the three auto makers have cut production of large pickup trucks, SUV, increase energy-saving small cars or crossovers. However, changing the structure of existing products, while car manufacturers have already “obvious”: before you have to master the technology of alternative energy vehicles.

“Battery is the core issue.” General Motors R & D lab materials laboratory director Mark? Sheet Mubarak said. Have been successful experiences with a certain market hybrid car, the battery technology in deciding the fate of the car key. It is understood that currently includes the Toyota Prius (configuration parameters Gallery) models, including hybrid vehicles use nickel-metal hydride batteries. And the battery technology itself has limitations. Remove the price factors, on the one hand, the decision by the material limits the size of storage capacity, lack of capacity Ni-MH battery life, on the other hand, it can not be extrapolated charging.

Li-ion battery is a high voltage, charge and discharge, long life, fast charging, self-discharge rate, wide operating temperature range, etc., have become the most cars and parts enterprises and the main direction of choice. Data show that, compared to nickel-metal hydride batteries, hybrid electric vehicles using lithium batteries can make the weight decreased by 40% to 50% and the volume reduced by 20% to 30%, energy efficiency has improved to some extent. Optimistic forecast said that in the near future, the vehicle will decrease the cost of lithium batteries to nickel-metal hydride battery 2 / 3.

Chinese stainless steel market on October 9 Nickel-based product pricing plunge

Chinese stainless steel market on October 9 run remains in the doldrums, the market traded good, pessimistic atmosphere filled the air, nickel stainless steel products fell sharply quotes, 200 series, 400 series also showed downward trend.

London Metal Exchange LME nickel 9 October opened at 13,800 U.S. dollars / ton, closing at 13,200 U.S. dollars / ton, 228 tons less inventory, total inventory is 55,032 tons. Shanghai No. 1 electrolytic nickel market on October 9 prices continue to decline, in the 113,000 to 117,000 yuan / ton, the average price of 115,000 yuan / ton, down 7,750 yuan / ton; 1 reported that 115,000 to 117,000 Jinchuan Nickel yuan / ton, the average price of 116,000 yuan / ton, down 7,750 yuan / ton. October 9 nickel price continued to fall, and the amplitude is relatively large, the spread of market pessimism, the overall trend showed sluggish operation. Futures market and the whole face of the recent financial market prices, the central bank, exchange, etc. have “Sword”, or cut, or forced to lighten up, or raising margin and so on, in order to stabilize markets and resolve risks. Can be stabilized to some extent market interest rates, commodity prices have weakened in the short term decline in the likelihood. However, if there is no follow-up to the introduction of the economic rescue plan, I do not rule out possible further decline in commodity markets.

Chinese stainless steel market on October 9 extending over the last few trading days of the downward trend, and the decrease in the expansion. Market pessimism filled the air, although the decline in nickel prices has narrowed the previous session, but the 9th London nickel and both the domestic spot price of nickel fell sharply, the stainless steel market under great pressure, especially nickel stainless steel, the more resources, demand poor circumstances, the offer is substantially reduced, Wuxi, Foshan, 300 series stainless steel offer the market fell sharply, part of the specification much more than the previous trading day decline, 304,309 S, 310S spared, sales of 304 products fell 1,000 to 1,700 yuan / ton. A huge sell-off spot market, traders generally expect to sell low-cost, mitigate the latter may again bring down the economic losses. Wuxi Steel 4 mm 304/NO.1 mainstream market transaction prices in the 21,500 yuan / ton, down 1,000 yuan / ton; Foshan 304/2B TISCO 2 mm market transaction price in the mainstream of 22,900 yuan / ton, down 1,000 yuan / ton. 200 lines, the product pricing in the falling nickel, stainless steel pressure to crack down on market downturn, the traders are not optimistic about the market, Foshan market transaction price of 200, Department of confusion again, some traders offer lower. Department of respect across the board 400 is lowered turnover remains at low, decline more obvious, but the rate of decline is not too much. Wuxi market down 430 base price of cold roll, big offer concentrated in the 11,400 yuan / ton, medium and small household purchase is concentrated in the 11,200 yuan / ton to 11,400 yuan / ton, Foshan market, the overall trend of 400 lines down across the board decline in the basic 100 yuan / ton. 11,200 compared to pre-yuan / ton to 11,600 yuan / ton, taking into account the sharp decline in nickel-based stainless steel, or will make further converting 400 series, 400 series outlook is worrisome.

200 line, the Wuxi market mainstream Lianzhong 201/2B plate bending 1.0 mm quoted 14,100 yuan / ton, down 100 yuan / ton, Wuxi market OurGame 201/NO.1 4 mm offer for mainstream flat-panel 14,200 yuan / ton, down 100 yuan / t; Foshan market Lianzhong 201/2B plate bending 1.0 mm quoted 15,600 yuan / ton, Foshan market Lianzhong 201/NO.1 4 ~ 5 mm coil 1.0 mm quoted at 13,600 yuan / ton, down 200 yuan / ton. 300 line, the Wuxi Zhang Pu production 304/2B plate 2.0 mm reported 21,000 yuan / ton, down 800 yuan / ton, Po new capacity 2.0 mm reported 21,000 yuan / ton, down 800 yuan / ton, TISCO 304/NO.1 Flat 5 mm reported 20,600 yuan / ton, down 700 yuan / ton, Zhang Pu reported 20,500 yuan / ton, down 700 yuan / ton, Foshan 304/2B TISCO coil 2.0 mm reported 22,900 yuan / ton, down 1,000 yuan / ton Zhang Pu reported 23,200 yuan / ton, down 1,000 yuan / ton, Jiuquan 304/NO.1 Coil 4 mm reported 22,500 yuan / ton, down 300 yuan / ton, Bao Steel Coil 4 mm reported 304/NO.1 22,800 yuan / ton, down 300 yuan / ton. 400 line, the Wuxi 430/2B TISCO 2.0 mm coil mainstream quoted 11,400 yuan / ton, Po is the new 2.0 mm major purchase 11,400 yuan / ton, down 100 yuan / ton, 430/No.1 Taiyuan Iron and Steel plate 4 mm Mainstream offer for 10,300 yuan / ton, down 200 yuan / ton; Foshan 430/2B TISCO 2.0 mm coil mainstream offer 11,500 yuan / ton; Foshan 430/2B coil 2.0 mm Zhang Pu mainstream offer 11,600 yuan / ton, down 100 yuan / ton.

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