BEIJING: Chinese scientists have developed a sensor by combining stainless steel acupuncture needles and nanomaterials to detect active heavy metals with high sensitivity.
Scientists from the Yantai Institute of Coastal Zone Research under the Chinese Academy of Sciences prepared a new needle-shaped sensor based on the acupuncture stainless steel needle, through the processes of insulation, sealing and functionalization with nanomaterials.
The sensor was tested in detecting the heavy metal copper in seawater. It exhibited excellent performance and ultra-high sensitivity for the detection of different forms of copper by ASV.
Heavy metals in seawater are harmful pollutants to human health and the ecological environment.
According to experts, anodic stripping voltammetry (ASV) is the most simple and effective technique for the analysis of metals. However, the sensitivity of the sensor used in this method needs improvement.
Novel sensors with high sensitivity for analysis of active heavy metals in seawater are needed.
The novel needle sensor showed advantages of high hardness, puncture-ability and easy integration of sensors, and it has great potential in marine electrochemistry, according to the team.
The research was published in the journal Analytical Methods.
US delays Huawei ban for 90 days
WASHINGTON: US officials have issued a 90-day reprieve on their ban on dealing with Chinese tech giant Huawei, saying breathing space was needed to avoid huge disruption.
A Commerce Department filing said the delay does not change the ban imposed by President Donald Trump on national security grounds, an action with major implications for US and Chinese technology firms.
Instead, it grants a temporary license that will allow Huawei to continue doing business with American firms.
“The Temporary General License grants operators time to make other arrangements and (gives) the Department space to determine the appropriate long term measures for Americans and foreign telecommunications providers that currently rely on Huawei equipment for critical services,” said Secretary of Commerce Wilbur Ross.
“In short, this license will allow operations to continue for existing Huawei mobile phone users and rural broadband networks.”
U.S. ban not to affect Huawei’s high-end and 5G products: Ren
SHENZHEN: The U.S. restrictions will definitely not affect Huawei’s high-end products, particularly in the 5G sector, said Ren Zhengfei, founder and president of Huawei Technologies Co., Ltd. on Tuesday.
The Bureau of Industry and Security (BIS) of the U.S. Department of Commerce earlier put Huawei and its affiliates on an “Entity List,” which would restrict the sale or transfer of U.S. technologies to the company.
At present, the ban will have an impact on Huawei’s low-end products, Ren said.
Huawei should not be restricted just because of its leading technology position, Ren told reporters.
“Our work is to benefit the whole humankind,” he said, adding that Huawei’s 5G equipment would greatly reduce the cost of the global telecom networks construction.
Huawei says discussing with Google how to deal with US ban
BEIJING: Huawei founder Ren Zhengfei on Tuesday said the company was discussing with Google how to deal with a US ban on companies selling or transferring US technology to Huawei.
The talks come after the US internet giant, whose Android mobile operating system powers most of the world’s smartphones, said this week it was beginning to cut ties with Huawei in light of the ban.
Google is a “highly responsible company,” Ren said, and that the two sides were “discussing how to create a response plan”.