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塑料制品磨损会释放微小的塑料颗粒，这些颗粒几乎肉眼不可见，若被人体摄入或吸入，可能会影响人体健康。为了使这些颗粒可生物降解，研究人员用植物淀粉而非石油来制造塑料。《农业与食品化学杂志》发表的一项初步研究表明，动物摄入这种由替代材料制成的塑料颗粒后产生了健康问题，例如肝损伤和肠道微生物组失衡。可生物降解的塑料一直被视为是一种比传统石油基塑料更安全、更环保的替代品。最常见的一种源自淀粉，淀粉是土豆、大米和小麦中所含的一种碳水化合物。关于淀粉基可生物降解塑料对人体有何影响，目前尚缺乏相关信息。由南京东南大学 Yongfeng Deng 领导的一组研究人员通过动物试验探究这些影响以解决这个问题。暴露于淀粉基塑料颗粒的小鼠出现多个器官（包括肝脏和卵巢）受损，且高剂量组小鼠的损伤更为明显；血糖管理发生改变，包括甘油三酯（一种脂肪）水平显著异常，血糖和脂质代谢相关的分子生物标志物出现紊乱。研究人员认为需要进一步研究以了解这些可生物降解的颗粒在体内的分解方式。 DOI 10.1021/acs.jafc.4c10855 EurekAlert:研究发现，淀粉基微塑料可能对小鼠造成健康风险
塑料制品磨损会释放微小的塑料颗粒，这些颗粒几乎肉眼不可见，若被人体摄入或吸入，可能会影响人体健康。为了使这些颗粒可生物降解，研究人员用植物淀粉而非石油来制造塑料。《农业与食品化学杂志》发表的一项初步研究表明，动物摄入这种由替代材料制成的塑料颗粒后产生了健康问题，例如肝损伤和肠道微生物组失衡。可生物降解的塑料一直被视为是一种比传统石油基塑料更安全、更环保的替代品。最常见的一种源自淀粉，淀粉是土豆、大米和小麦中所含的一种碳水化合物。关于淀粉基可生物降解塑料对人体有何影响，目前尚缺乏相关信息。由南京东南大学 Yongfeng Deng 领导的一组研究人员通过动物试验探究这些影响以解决这个问题。暴露于淀粉基塑料颗粒的小鼠出现多个器官（包括肝脏和卵巢）受损，且高剂量组小鼠的损伤更为明显；血糖管理发生改变，包括甘油三酯（一种脂肪）水平显著异常，血糖和脂质代谢相关的分子生物标志物出现紊乱。研究人员认为需要进一步研究以了解这些可生物降解的颗粒在体内的分解方式。 DOI 10.1021/acs.jafc.4c10855 EurekAlert:研究发现，淀粉基微塑料可能对小鼠造成健康风险
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Like a stock, you can buy and hold Bitcoin as an investment. You can even now do so in special retirement accounts called Bitcoin IRAs. No matter where you choose to hold your Bitcoin, people’s philosophies on how to invest it vary: Some buy and hold long term, some buy and aim to sell after a price rally, and others bet on its price decreasing. Bitcoin’s price over time has experienced big price swings, going as low as $5,165 and as high as $28,990 in 2020 alone. “I think in some places, people might be using Bitcoin to pay for things, but the truth is that it’s an asset that looks like it’s going to be increasing in value relatively quickly for some time,” Marquez says. “So why would you sell something that’s going to be worth so much more next year than it is today? The majority of people that hold it are long-term investors.”
What is Telegram?
Telegram’s stand out feature is its encryption scheme that keeps messages and media secure in transit. The scheme is known as MTProto and is based on 256-bit AES encryption, RSA encryption, and Diffie-Hellman key exchange. The result of this complicated and technical-sounding jargon? A messaging service that claims to keep your data safe.Why do we say claims? When dealing with security, you always want to leave room for scrutiny, and a few cryptography experts have criticized the system. Overall, any level of encryption is better than none, but a level of discretion should always be observed with any online connected system, even Telegram.
