名侦探柯南

经过基因改造的浮萍可能是一种更可持续的生物燃料来源_我的网站

A |     这项研究是由美国能源部布鲁克海文国家实验室和纽约冷泉港实验室的研究人员进行的。他们从一种被称为Lemna japonica的现有浮萍开始，向其添加了多个基因，这些基因已经被认为可以驱动其他植物的燃料生产和储存。在被描述为推/拉/保护效应中，其中一个基因推动（增加）脂肪酸的生产，其中一个基因将这些脂肪酸拉（组装）成三酰甘油油，另一个基因通过在植物组织中涂抹油滴来保护它们免受环境的降解。因此，工程浮萍积累的油几乎占其干重生物量的10%，据说这比该植物的野生对应物的积累率增加了100倍。    WASHINGTON -- The Treasury Department said Thursday that it has imposed its first set of sanctions on two companies that shipped Russian oil in violation of a multinational price cap.The United States, along with the European Union, countries in the Group of Seven and Australia, imposed a $60 a barrel limit last year on what Russia could charge for its oil. The cap was designed to deprive the Kremlin of revenue to fund its war in Ukraine, forcing the Russian government either to sell its oil at a discount or divert money for a costly alternative shipping network.The companies being penalized are based in the United Arab Emirates and Turkey, the department said in a statement.A ship owned by the Emirates-based company Lumber Marine carried oil priced above $75 a barrel from a Russian port. Separately, a vessel owned by Turkey-based Ice Pearl Navigation ferried oil from Russia priced at $80 a barrel. Both companies relied on U.S. service providers. As a result of the sanctions, the Biden administration is blocking the companies' ability to conduct business or access any property or financial interests in the U.S.A senior treasury official, who briefed reporters on condition of anonymity per department rules, said that the government has usually contacted a ship's flagging nation and insurer if there is even a suspicion of a violation, leading to the ship losing access to insurance or a country's registration.The official said that Russia has tried to build an alternative shipping network to avoid the cap, but that has proved to be expensive, with private analyses indicating that it has cost $35 per barrel of oil.The administration has argued that the cap has been successful, leading to a 45% drop in Russian oil tax revenue over the past year. The official said the focus of enforcing the cap will be on further increasing costs for Russia's oil industry so Moscow has less money available to support its military in Ukraine.The coalition enforcing the price cap also released a set of recommendations to improve compliance within the maritime oil industry. The guidance was aimed at countries as well as private companies. It recommends that all ships have legitimate insurance and rely on industry standard classifications, among other policies focused on stepped-up monitoring of the sector.。它的油产量是当今最大的生物柴油来源大豆的7倍以上。然而，与大豆不同的是，浮萍作物不会占用农田，因为它们将被种植在大型容器或池塘中。事实上，科学家们建议，浮萍作物可以种植在养猪场和家禽场的液体废物径流中，这些植物将通过从水中吸取多余的营养物质来帮助清理。一个挑战在于，通常情况下，推动脂肪酸生产的基因也会阻碍植物生长。为了解决这个问题，"推动"基因与另一个被称为启动子的基因配对，后者通过向水中添加一种特定的化学诱导剂而被激活。首席科学家，布鲁克海文生物化学家John Shanklin说：“加入这个启动子可以使推动基因保持关闭，直到我们加入诱导剂，这使得植物在我们开启脂肪酸/石油生产之前可以正常生长。”研究人员现在正在研究种植浮萍并从中提取商业规模的油的方法。

B | 关于这项研究的一篇论文最近发表在《植物生物技术杂志》上。

Current article:http://www.yuejinhuapennuochoudengying.cyou/list_391z28/2pcp.html

Published on:00:23:30