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کدام یک از فرآیندهای زیر بیشتر احتمال دارد که در مهندسی بافت با استفاده از سلول‌های بنیادی جنینی (ESC) به تحریک تمایز سلولی در جهت بافت‌های خاص مانند استخوان یا غضروف منجر شود؟ 👩🏻💻👩🏻🔬🌿
Anonymous Quiz
1. استفاده از محیط کشت غنی‌شده با فاکتورهای رشد BMP (Bone Morphogenetic Proteins)
2. ایجاد شرایط هایپوکسی با فشار کم اکسیژن در محیط کشت
3. مهار مسیر سیگنال‌دهی Wnt به‌وسیله مهارکننده‌های خاص
4. استفاده از مواد هیدروژلی به عنوان داربست‌های سه‌بعدی بدون افزودن فاکتورهای رشد
Russians and Ukrainians are both prolific users of Telegram. They rely on the app for channels that act as newsfeeds, group chats (both public and private), and one-to-one communication. Since the Russian invasion of Ukraine, Telegram has remained an important lifeline for both Russians and Ukrainians, as a way of staying aware of the latest news and keeping in touch with loved ones. The Dow Jones Industrial Average fell 230 points, or 0.7%. Meanwhile, the S&P 500 and the Nasdaq Composite dropped 1.3% and 2.2%, respectively. All three indexes began the day with gains before selling off. Asked about its stance on disinformation, Telegram spokesperson Remi Vaughn told AFP: "As noted by our CEO, the sheer volume of information being shared on channels makes it extremely difficult to verify, so it's important that users double-check what they read." Some privacy experts say Telegram is not secure enough The gold standard of encryption, known as end-to-end encryption, where only the sender and person who receives the message are able to see it, is available on Telegram only when the Secret Chat function is enabled. Voice and video calls are also completely encrypted.
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