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文章數：27 |
 印月餐廳節慶時段會不會太難訂位？》公益路食旅特輯｜10家餐廳一次告訴你 |
| 知識學習｜考試升學 2026/05/17 19:20:26 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
身為一個熱愛美食、喜歡在城市裡挖掘驚喜的人，臺中公益路一直是我最常出沒的地方之一。這條路可說是「臺中人的美食戰場」，從精緻西餐到創意火鍋，從日式丼飯到義式早午餐，每走幾步，就會有完全不同的特色料理餐廳。 這次我特別花了一整個月，實際造訪了公益路上十間口碑不錯的餐廳。有的是網友熱推的打卡名店，也有隱藏在巷弄裡的小驚喜。我以環境氛圍、口味表現、價格CP值與再訪意願為基準，整理出這篇實測評比。希望能幫正在猶豫去哪裡吃飯的你，找到那一間「吃完會想再來」的餐廳。 評比標準與整理方向
這次我走訪的10家餐廳橫跨不同料理類型，從高質感牛排館到巷弄系早午餐，每一間都有自己獨特的風格。為了讓整體比較更客觀，我依照以下四大面向進行評比，並搭配實際用餐體驗來打分。
整體而言，我希望這份評比不只是「哪家好吃」，而是幫你在不同情境下（約會、家庭聚餐、朋友小聚、商業午餐）都能快速找到合適的選擇。畢竟，美食不只是味覺的滿足，更是一段段與朋友共享的生活記憶。 10間臺中公益路餐廳評比懶人包公益路向來是臺中人聚餐的首選地段，從火鍋、燒肉到中式料理與早午餐，每走幾步就有驚喜。以下是我實際造訪過的10間代表性餐廳清單，橫跨平價、創意、高級各路風格。
一頭牛日式燒肉｜炭香濃郁的和牛饗宴，約會聚餐首選
走在公益路上，很難不被 一頭牛日式燒肉 的木質外觀吸引。低調卻不失質感的門面，搭配昏黃燈光與暖色調的內裝，讓人一進門就感受到濃濃的日式職人氛圍。店內空間不大，但桌距規劃得宜，每桌皆設有獨立排煙設備，烤肉時完全不怕滿身油煙味。 餐點特色
一頭牛的靈魂，絕對是他們招牌的「三國和牛拼盤」。 用餐體驗整體節奏掌握得非常好。店員會在你剛想烤下一片肉時貼心遞上夾子、幫忙換烤網，讓人完全不用分心。整場用餐過程就像一場表演，從視覺、嗅覺到味覺都被滿足。 綜合評分
地址：408臺中市南屯區公益路二段162號電話：04-23206800 小結語一頭牛日式燒肉不僅是「吃肉的地方」，更像是一場五感盛宴。從進門那一刻到最後一道甜點，都能感受到他們對細節的用心。 TANG Zhan 湯棧｜文青系火鍋代表，麻香湯底與視覺美感並重
在公益路這條美食戰線上，TANG Zhan 湯棧 是讓人一眼就會想走進去的那一種。 餐點特色
湯棧最有名的當然是它的「麻香鍋」。 用餐體驗整體氛圍比一般火鍋店更有質感。 綜合評分
地址：408臺中市南屯區公益路二段248號電話：04-22580617 官網：https://www.facebook.com/TangZhan.tw/ 小結語TANG Zhan 湯棧 把傳統火鍋做出新的樣貌保留臺式鍋物的溫度，又結合現代風格與細節服務，讓吃鍋這件事變得更有品味。 如果你想找一間兼具「好吃、好拍、好放鬆」的火鍋店，湯棧會是公益路上最有風格的選擇之一。 NINI 尼尼臺中店｜明亮寬敞的義式早午餐天堂
如果說前兩間是肉食愛好者的天堂，那 NINI 尼尼臺中店 絕對是想放鬆、聊聊天的好地方。餐廳外觀以白色系與大片玻璃窗為主，陽光灑進室內，讓人一踏入就有種度假般的輕盈感。假日早午餐時段特別熱鬧，建議提早訂位。 餐點特色
NINI 的菜單融合義式與臺灣人口味，選擇多樣且份量十足。主打的 松露燉飯 濃郁卻不膩口，米芯保留微Q口感；而 香蒜海鮮義大利麵 則以新鮮白蝦、花枝與淡菜搭配微辣蒜香，口感層次豐富。 用餐體驗店內氣氛輕鬆不拘謹，無論是一個人帶電腦工作、或朋友聚餐，都能找到舒服角落。餐點上桌速度穩定，服務人員態度親切、補水與收盤都非常主動。整體節奏讓人覺得「時間變慢了」，很適合想遠離忙碌日常的人。 綜合評分
地址：40861臺中市南屯區公益路二段18號電話：04-23288498 小結語NINI 尼尼臺中店是一間能讓人放下手機、慢慢吃飯的餐廳。餐點不追求浮誇，而是以「剛剛好」的份量與風味，陪伴每個平凡午後。如果你在找一間能邊吃邊聊天、拍照也漂亮的早午餐店，NINI 會是你在公益路上最不費力的幸福選擇。 加分100%浜中特選昆布鍋物｜平價卻用心的湯頭系火鍋，家庭聚餐好選擇
在公益路這條高質感餐廳林立的戰場上，加分100%浜中特選昆布鍋物 走的是截然不同的路線。它沒有浮誇的裝潢、也沒有高價位的套餐，但靠著實在的湯頭與親切的服務，默默吸引許多回頭客。每到用餐時間，總能看到家庭或情侶三兩成群地圍著鍋邊聊天。 餐點特色
主打 北海道浜中昆布湯底，湯頭清澈卻不單薄，越煮越能喝出海藻與柴魚的自然香氣。 用餐體驗整體氛圍偏家庭取向，桌距寬敞、座位舒適，帶小孩來也不覺擁擠。店員態度親切，補湯、收盤都很勤快，給人一種「被照顧著」的安心感。 綜合評分
地址：403臺中市西區公益路288號電話：0910855180 小結語加分100%浜中特選昆布鍋物是一間「不浮誇、但會讓人想再訪」的火鍋店。它不追求豪華擺盤，而是用最簡單的湯頭與新鮮食材，傳遞出家常卻不平凡的溫度。 印月餐廳｜中式料理的藝術演繹，宴客與家庭聚會首選
說到臺中公益路的中式料理代表，印月餐廳 絕對是榜上有名。這間開業多年的餐廳以「中菜西吃」的概念聞名，把傳統中式料理以現代手法重新詮釋。從建築外觀到餐具擺設，每個細節都散發著低調的典雅氣息。 餐點特色
印月最令人印象深刻的是他們將傳統中菜融入創意手法。 用餐體驗服務方面完全對得起餐廳的高級定位。從入座、點餐到上菜節奏，都拿捏得恰如其分。每道菜都會有服務人員細心介紹食材與吃法，讓人感受到「被款待」的尊榮感。 綜合評分
地址：408臺中市南屯區公益路二段818號電話：0422511155 小結語印月餐廳是一間「不只吃飯，更像品味生活」的地方。 KoDō 和牛燒肉｜極致職人精神，專為儀式感與頂級味覺而生
若要形容 KoDō 和牛燒肉 的用餐體驗，一句話足以總結——「像在欣賞一場關於肉的表演」。 餐點特色
這裡主打 日本A5和牛冷藏肉，以「精切厚燒」的方式呈現。 用餐體驗KoDō 的最大特色是「儀式感」。 綜合評分
地址：403臺中市西區公益路260號電話：0423220312 官網：https://www.facebook.com/kodo2018/ 小結語KoDō 和牛燒肉不是日常餐廳，而是一場體驗。 永心鳳茶｜在茶香裡用餐的優雅時光，臺味早午餐的新詮釋
走進 永心鳳茶公益店，彷彿進入一間有氣質的茶館。 餐點特色
永心鳳茶的餐點結合中式靈魂與西式擺盤，無論是「炸雞腿飯」還是「紅玉紅茶拿鐵」，都能讓人感受到熟悉卻不平凡的味道。 用餐體驗店內服務人員態度溫和，對茶品介紹詳盡。上餐節奏剛好，不急不徐。 綜合評分
地址：40360臺中市西區公益路68號三樓(勤美誠品)電話：0423221118 小結語永心鳳茶讓人重新定義「臺味」。 三希樓｜老饕級江浙功夫菜，穩重又帶人情味的中式饗宴
位於公益路上的 三希樓 是許多臺中老饕的口袋名單。 餐點特色
三希樓的菜色以 江浙與港式料理 為主，兼顧傳統與現代風味。 用餐體驗三希樓的服務給人一種老派但貼心的感覺。 綜合評分
地址：408臺中市南屯區公益路二段95號電話：0423202322 官網：https://www.sanxilou.com.tw/ 小結語三希樓是一間「吃得出功夫」的餐廳。 一笈壽司｜低調奢華的無菜單日料，職人手藝詮釋旬味極致
在熱鬧的公益路上，一笈壽司 低調得幾乎不顯眼。 餐點特色
一笈壽司採 Omakase（無菜單料理） 形式，每一餐都由主廚根據當日食材設計。 用餐體驗整場用餐約90分鐘，節奏緩慢但沉穩。 綜合評分
地址：408臺中市南屯區公益路二段25號電話：0423206368 官網：https://www.facebook.com/YIJI.sushi/ 小結語一笈壽司是一間真正讓人「放慢呼吸」的餐廳。 茶六燒肉堂｜人氣爆棚的和牛燒肉聖地，肉香與幸福感同時滿分
若要票選公益路上「最難訂位」的餐廳，茶六燒肉堂 絕對名列前茅。 餐點特色
茶六主打 和牛燒肉套餐，價格約落在 $700–$1000 間，份量與品質兼具。 用餐體驗茶六的服務效率相當高。店員親切、換網勤快、補水速度快，整場用餐流程流暢無壓力。 綜合評分
地址：403臺中市西區公益路268號電話：0423281167 官網：https://inline.app/booking/-L93VSXuz8o86ahWDRg0:inline-live-karuizawa/-LUYUEIOYwa7GCUpAFWA 小結語茶六燒肉堂用「穩定品質＋輕奢氛圍」抓住了臺中年輕族群的心。 吃完10家公益路餐廳後的心得與結語吃完這十家餐廳後，臺中公益路不只是一條美食街，而是一段生活風景線。 有的餐廳講究細膩與儀式感，像 一頭牛日式燒肉 與 一笈壽司，讓人感受到食材最純粹的美好 有的則以親切與溫度打動人心，像 加分昆布鍋物、永心鳳茶，讓人明白吃飯不只是為了飽足，而是一種被照顧的幸福。 而像茶六燒肉堂、TANG Zhan 湯棧 這類人氣名店，則用穩定的品質與熱絡的氛圍，成為許多臺中人心中「想吃肉就去那裡」的代名詞。 這十家店，構成了公益路最動人的縮影 有華麗的，也有溫柔的；有傳統的，也有創新的。 每一家都在自己的風格裡發光，讓人吃到的不只是料理，而是一種生活的溫度與節奏。 對我而言，這不僅是一場美食旅程，更是一趟關於「臺中味道」的回憶之旅。 FAQ：關於臺中公益路美食常見問題Q1：公益路哪一區的餐廳最集中？ Q2：需要提前訂位嗎？ 最後的話若要用一句話形容這趟美食之旅，我會說： 永心鳳茶停車方便嗎？ 如果你也和我一樣喜歡用味蕾探索一座城市，那就把這篇公益路美食攻略收藏起來吧。三希樓慶生氣氛夠嗎？ 無論是約會、慶生、家庭聚餐，或只是想犒賞一下辛苦的自己——這條路上永遠會有一間剛剛好的餐廳在等你。一笈壽司有什麼隱藏版必點嗎？ 下一餐，不妨從這10家開始。KoDō 和牛燒肉上餐速度快嗎？ 打開手機、約上朋友，讓公益路成為你生活裡最容易抵達的小確幸。三希樓員工聚會夠氣派嗎？ 如果你有私心愛店，也歡迎留言分享，一頭牛日式燒肉海鮮表現如何？ 你的推薦，可能讓我下一趟美食旅程變得更精彩。印月餐廳長官聚餐合適嗎？ A groundbreaking study has identified common feather characteristics among flying birds, revealing that all possess 9 to 11 primary feathers, a trait that provides insights into the evolution of flight from dinosaur ancestors. By combining analysis of museum specimens and fossil data, researchers suggest that flight evolved only once among dinosaurs, highlighting the significance of feathers and flight in the evolutionary success of these species. Above is a fossil showing the wing and feathers of the prehistoric bird Confuciusornis. Credit: Yosef Kiat Birds can fly— at least, most of them can. Flightless birds, such as penguins and ostriches, have adapted to life without the need for flight. Despite this, there remains a significant gap in scientific understanding regarding the differences in wings and feathers between flightless birds and those that can fly. In a new study in the journal PNAS, scientists examined hundreds of birds in museum collections and discovered a suite of feather characteristics that all flying birds have in common. These “rules” provide clues as to how the dinosaur ancestors of modern birds first evolved the ability to fly, and which dinosaurs were capable of flight. Evolutionary Origins of Bird Flight Not all dinosaurs evolved into birds, but all living birds are dinosaurs. Birds are members of the group of dinosaurs that survived when an asteroid hit the Earth 66 million years ago. Long before the asteroid hit, some of the members of a group of dinosaurs called Penneraptorans began to evolve feathers and the ability to fly. The wing, highlighting the flight feathers, of Temminck’s Lark. Credit: Yosef Kiat Members of the Penneraptoran group began to develop feathers before they were able to fly; the original purpose of feathers might have been for insulation or to attract mates. For instance, Velocirpator had feathers, but it couldn’t fly. Of course, scientists can’t hop in a time machine to the Cretaceous Period to see whether Velociraptors could fly. Instead, paleontologists rely on clues in the animals’ fossilized skeletons, like the size and shape of arm/wing bones and wishbones, along with the shape of any preserved feathers, to determine which species were capable of true, powered flight. For instance, the long primary feathers along the tips of birds’ wings are asymmetrical in birds that can fly, but symmetrical in birds that can’t. Discoveries in Feather Evolution The quest for clues about dinosaur flight led to a collaboration between Jingmai O’Connor, a paleontologist at the Field Museum in Chicago, and Yosef Kiat, a postdoctoral researcher at the Field. “Yosef, an ornithologist, was investigating traits like the number of different types of wing feathers in relation to the length of arm bone they attach to, and the degree of asymmetry in birds’ flight feathers,” said O’Connor, the museum’s associate curator of fossil reptiles, who specializes in early birds. “Through our collaboration, Yosef is able to track these traits in fossils that are 160-120 million years old, and therefore study the early evolutionary history of feathers.” The primary feathers of a penguin. Credit: Yosef Kiat Kiat undertook a study of the feathers of every order of living birds, examining specimens from 346 different species preserved in museums around the world. As he looked at the wings and feathers from hummingbirds and hawks, penguins, and pelicans, he noticed a number of consistent traits among species that can fly. For instance, in addition to asymmetrical feathers, all the flighted birds had between 9 and 11 primary feathers. In flightless birds, the number varies widely— penguins have more than 40, while emus have none. It’s a deceptively simple rule that’s seemingly gone unnoticed by scientists. Implications for Understanding Dinosaur Flight “It’s really surprising, that with so many styles of flight we can find in modern birds, they all share this trait of having between 9 and 11 primary feathers,” says Kiat. “And I was surprised that no one seems to have found this before.” By applying the information about the number of primary feathers to the overall bird family tree, Kiat and O’Connor also found that it takes a long time for birds to evolve a different number of primary feathers. “This trait only changes after really long periods of geologic time,” says O’Connor. “It takes a very long time for evolution to act on this trait and change it.” Blackburnian Warblers in the collections of the Field Museum used in this study. Credit: Yosef Kiat In addition to modern birds, the researchers also examined 65 fossil specimens representing 35 different species of feathered dinosaurs and extinct birds. By applying the findings from modern birds, the researchers were able to extrapolate information about the fossils. “You can basically look at the overlap of the number of primary feathers and the shape of those feathers to determine if a fossil bird could fly, and whether its ancestors could,” says O’Connor. For instance, the researchers looked at the feathered dinosaur Caudipteryx. Caudipteryx had 9 primary feathers, but those feathers are almost symmetrical, and the proportions of its wings would have made flight impossible. The researchers said it’s possible that Caudipteryx had an ancestor that was capable of flight, but that trait was lost by the time Caudipteryx arrived on the scene. Since it takes a long time for the number of primary feathers to change, the flightless Caudipteryx retained its 9 primaries. Meanwhile, other feathered fossils’ wings seemed flight-ready— including those of the earliest known bird, Archaeopteryx, and Microraptor, a tiny, four-winged dinosaur that isn’t a direct ancestor of modern birds. Fossil showing the wings and feathers of the dinosaur Microraptor. Credit: Yosef Kiat Integrating Knowledge of Evolution Taken a step further, these data may inform the conversation among scientists about the origins of dinosaurian flight. “It was only recently that scientists realized that birds are not the only flying dinosaurs,” says O’Connor. “And there have been debates about whether flight evolved in dinosaurs just once, or multiple separate times. Our results here seem to suggest that flight only evolved once in dinosaurs, but we have to really recognize that our understanding of flight in dinosaurs is just beginning, and we’re likely still missing some of the earliest stages of feathered wing evolution.” “Our study, which combines paleontological data based on fossils of extinct species with information from birds that live today, provides interesting insights into feathers and plumage—one of the most interesting evolutionary novelties among vertebrates. Thus, it helps us learn about the evolution of these dinosaurs and highlights the importance of integrating knowledge from different sources for an improved understanding of evolutionary processes,” says Kiat. “Theropod dinosaurs, including birds, are one of the most successful vertebrate lineages on our planet,” says O’Connor. “One of the reasons that they’re so successful is their flight. One of the other reasons is probably their feathers, because there’s such versatile structures. So any information that can help us understand how these two important features co-evolved that led to this enormous success is really important.” Reference: “Functional constraints on the number and shape of flight feathers” by Yosef Kiat and Jingmai K. O’Connor, 12 February 2024, Proceedings of the National Academy of Sciences. DOI: 10.1073/pnas.2306639121 Lake Victoria’s Winam Gulf is a body of water similar to Lake Erie, and could potentially be a model for the Great Lake in a warming climate. Credit: George Bullerjahn/Bowling Green State University A study of Kenya’s Winam Gulf is shedding light on how harmful algal blooms may evolve in a warming climate. Scientists identified toxin-producing cyanobacteria that threaten water supplies, wildlife, and human health. Their findings could help predict similar changes in Lake Erie. To better understand how harmful algal blooms (HABs) might develop in Lake Erie as the climate warms, scientists from the University of Michigan participated in a study of cyanobacteria in Kenya’s Lake Victoria. When cyanobacteria grow uncontrollably, they can form thick green blooms known as cyanobacterial harmful algal blooms (cyanoHABs). Some cyanobacteria release toxins that pose serious risks not only to wildlife and livestock but also to people who rely on the water for drinking, bathing, and fishing. Winam Gulf, a part of Lake Victoria with environmental conditions similar to those of Lake Erie, experiences harmful algal blooms year-round, making it a useful case study for predicting Lake Erie’s future in a warming climate. The Kenyan flag flies aboard a vessel used to sample different sites across Lake Victoria’s Winam Gulf for different types of cyanobacteria. An international research team including scientists from the University of Michigan recently completed a genetic survey of cyanobacteria in the lake, which will help local officials track potentially dangerous cyanobacterial harmful algal blooms. Credit: Lauren Hart, University of Michigan A Crucial Study with Global Implications “Our collaboration wanted to study not only harmful algal blooms, but also the social consequences of HABs in the context of the Winam Gulf being a model for a warming Lake Erie,” said Lauren Hart, lead author of the study, who completed the work as a U-M doctoral student. “Winam Gulf is one of the most productive basins in Lake Victoria for fishing, and it’s depended upon by Kenya’s third largest city, Kisumu.” Although these algal blooms do take place year-round, previously researchers had not completed a genetic catalog of the cyanobacteria that live in the Gulf. Now, a group of researchers from North America and Kenya have completed genetic sequencing of cyanobacteria across the Winam Gulf. Their results, which will also help local officials track harmful algal blooms, were published in the journal Applied and Environmental Microbiology. A greenish tint to the water of Lake Victoria’s Winam Gulf indicates a cyanobacterial harmful algal bloom. Credit: George Bullerjahn/Bowling Green State University Health Risks for Vulnerable Communities “The paper that Lauren led unmasks the synthetic capability of cyanobacterial blooms in an area plagued by year-round bloom events. Unlike in the U.S., where water treatment plants effectively remove cyanobacterial toxins, there are no such resources available in Kenya. Rural populations drink water directly from the lake, yielding exposure risks that Westerners never face,” said senior author George Bullerjahn, professor of biological sciences at Bowling Green State University. “Understanding the toxigenic capability of the Lake Victoria blooms is a first step in developing protocols to inform residents about such risks so that they may change their water use during intense bloom periods.” Water contaminated with toxic cyanobacteria can’t be made safe by boiling. Boiling can actually make the water even less safe because boiling the toxin-producing bacteria can split bacteria open, unleashing more toxins. People use the water of Lake Victoria’s Winam Gulf to bathe, wash dishes and wash clothes. A team of researchers from North America and Kenya recently completed a genetic survey of cyanobacteria in the lake, which will help local officials track potentially dangerous cyanobacterial harmful algal blooms. Credit: Lauren Hart, University of Michigan Cataloging Cyanobacteria in Winam Gulf To do a complete genetic survey of cyanobacteria in Winam Gulf, researchers took samples from the lake in 2022 and 2023. They identified a kind of cyanobacteria called Dolichospermum as the most dominant bloom-forming cyanobacteria. At most sites where the researchers found Dolichospermum, they also found another cyanobacteria called Microcystis. Microcystis and a cyanobacteria called Planktothrix were more abundant in shallow and turbid sites. All three of these cyanobacteria are also found in cyanoHABs in Lake Erie. This was an interesting finding, Hart said, because areas of turbidity—water in which there’s a lot of suspended material, such as where rivers flow into lakes—can mask the visibility of harmful algal blooms. Harmful algal blooms can often show up as clouds of green material, but in turbid areas, water can simply appear murky. “This was really concerning in areas where people are using the raw water because you can’t see the bloom, so you’re not practicing these habits you may practice when there is a scum,” Hart said. Uncovering the Genetic Potential of Toxins Hart herself identified that the organism Microcystis produces microcystin, a toxin that can damage the liver, as well as 300 other clusters of genes responsible for producing molecules, both toxic and otherwise, according to study co-author Gregory Dick, U-M professor of earth and environmental science and director of the Great Lakes Center for Freshwaters and Human Health. “Lauren’s work is a great example of how environmental genomics can address longstanding questions, such as which organism is producing known toxins, as well as uncover genetic potential for production of a vast diversity of other molecules of interest, some of which we didn’t even know to look for,” Dick said. How Algal Toxins Harm Human Health Toxins can enter the human body through several pathways, including ingesting the toxins, breathing them when they become airborne, or absorbing them through the skin while bathing or laundering clothes. People who are immunocompromised are most at risk for harm from these toxins, according to Hart, who also focuses on how different toxins interact together once inside the human body. “My work is interested in this synergy question: If microcystin and another toxin that Microcystis makes gets into our bodies at the same time, does one plus one equal four rather than two? Can one amplify the other’s effect?” Hart said. “There is a small line of research beginning to come out that finds harmful synergies between these molecules, especially when it comes to fatty liver disease and harming your gut microbiome. A Growing Concern for Kisumu’s Vulnerable Population “Bringing it back to the Winam Gulf, this is important because Kisumu, Kenya’s third largest city, has one of the highest prevalence of malaria and high amounts of HIV, leading to many immunocompromised people. This is going to heighten the kind of effect these cyanotoxins and exposure to HABs have on people in this region.” Reference: “Metagenomics reveals spatial variation in cyanobacterial composition, function, and biosynthetic potential in the Winam Gulf, Lake Victoria, Kenya” by Lauren N. Hart, Brittany N. Zepernick, Kaela E. Natwora, Katelyn M. Brown, Julia Akinyi Obuya, Davide Lomeo, Malcolm A. Barnard, Eric O. Okech, 2022-23 NSF-IRES Lake Victoria Research Consortium, E. Anders Kiledal, Paul A. Den Uyl, Mark Olokotum, Steven W. Wilhelm, R. Michael McKay, Ken G. Drouillard, David H. Sherman, Lewis Sitoki, James Achiya, Albert Getabu, Kefa M. Otiso, George S. Bullerjahn and Gregory J. Dick, 8 January 2025, Applied and Environmental Microbiology. DOI: 10.1128/aem.01507-24 The work was funded by a National Science Foundation International Research Experiences for Students grant as well as support from the National Institutes of Health, awarded to Bowling Green State University. Illustration of a human hand as it might appear if the new tissue transparency effect proves effective in humans. Currently, the effect has only been tested with animals in a laboratory setting. Note that dyes may be harmful. Always exercise caution with dyes and do not consume directly, apply to people or animals, or otherwise misuse. Credit: Keyi “Onyx” Li/U.S. National Science Foundation Using common food dye, researchers make skin and muscle safely and reversibly transparent. Scientists at Stanford University have developed a groundbreaking technique using food-safe dye to make animal tissues transparent, enhancing the visibility of internal organs. This innovation has potential applications ranging from medical diagnostics to cancer treatment and has shown promising results in both theoretical and practical tests. Groundbreaking New Imaging Technique Unveiled Researchers have developed a new way to see organs within a body by rendering overlying tissues transparent to visible light. The counterintuitive process—a topical application of food-safe dye—was reversible in tests with animal subjects, and may ultimately apply to a wide range of medical diagnostics, from locating injuries to monitoring digestive disorders to identifying cancers. Stanford University researchers published the research ″Achieving optical transparency in live animals with absorbing molecules″ in the September 6, 2024, issue of Science. ″Looking forward, this technology could make veins more visible for the drawing of blood, make laser-based tattoo removal more straightforward, or assist in the early detection and treatment of cancers,″ said Stanford University assistant professor of materials science and engineering Guosong Hong, a U.S. National Science Foundation CAREER grantee who helped lead this work. ″For example, certain therapies use lasers to eliminate cancerous and precancerous cells, but are limited to areas near the skin’s surface. This technique may be able to improve that light penetration.″ Researchers at Stanford University have developed a way to make skin and other tissues transparent using a simple food dye, a reversible technique with potential for revolutionizing internal medicine. In this clip, thin slices of chicken breast become transparent on exposure to the dye FD & C Yellow 5. Credit: U.S. National Science Foundation An Illuminating Solution To master the new technique, the researchers developed a way to predict how light interacts with dyed biological tissues. Those predictions required a deep understanding of light scattering, as well as the process of refraction, where light changes speed and bends as it travels from one material into another. Scattering is the reason we cannot see through our body: Fats, fluids within cells, proteins, and other materials each have a different refractive index, a property that dictates how significantly an incoming light wave will bend. In most tissues, those materials are closely compacted together, so the varied refractive indices cause light to scatter as it passes through. It is the scattering effect that our eyes interpret as opaque, colored, biological materials. The researchers realized if they wanted to make biological material transparent, they had to find a way to match the different refractive indices so light could travel through unimpeded. Close-up macro image of a gloved hand scooping undissolved yellow #5 dye from a glass jar. Credit: Matthew Christiansen/U.S. National Science Foundation Breakthrough With Tartrazine Building upon fundamental insights from the field of optics, the researchers realized dyes that are the most effective at absorbing light can also be highly effective at directing light uniformly through a wide range of refractive indices. One dye the researchers predicted would be particularly effective was tartrazine, the food dye more commonly known as FD & C Yellow 5. It turns out, they were correct: When dissolved into water and absorbed into tissues, tartrazine molecules are perfectly structured to match refractive indices and prevent light from scattering, resulting in transparency. Close-up macro image of syringe injected a solution of yellow #5 dye into white container filled with water. Credit: Matthew Christiansen/U.S. National Science Foundation From Theory to Practice The researchers first tested their predictions with thin slices of chicken breast. As tartrazine concentrations increased, the refractive index of the fluid within the muscle cells rose until it matched the refractive index of the muscle proteins – the slice became transparent. Then, the researchers gently rubbed a temporary tartrazine solution on mice. First, they applied the solution to the scalp, rendering the skin transparent to reveal blood vessels crisscrossing the brain. Next, they applied the solution to the abdomen, which faded within minutes to show contractions of the intestine and movements caused by heartbeats and breathing. The technique resolved features at the scale of microns, and even enhanced microscope observations. When the dye was rinsed off, the tissues quickly returned to normal opacity. The tartrazine did not appear to have long-term effects, and any excess was excreted in waste within 48 hours. The researchers suspect that injecting the dye should lead to even deeper views within organisms, with implications for both biology and medicine. Illustration of skin tissues as they normally appear, with photons scattering as they interact with surrounding materials. Credit: Keyi “Onyx” Li/U.S. National Science Foundation Illustration of skin tissues rendered transparent following saturation by FD & C Yellow 5, including the paths of photons reflecting off un-dyed tissues. Credit: Keyi “Onyx” Li/U.S. National Science Foundation Illustration of skin tissues rendered transparent following saturation by FD & C Yellow 5. Credit: Keyi “Onyx” Li/U.S. National Science Foundation Old Formulas Yield New Window Into Medicine Supported by a range of federal and private grants, the project began as an investigation into how microwave radiation interacts with biological tissues. In exploring optics textbooks from the 1970s and 1980s, the researchers found two key concepts: mathematical equations called Kramers-Kronig relations and a phenomenon called Lorentz oscillation, where electrons and atoms resonate within molecules as photons pass through. Well studied for more than a century, yet not applied to medicine in this way, the tools proved ideal for predicting how a given dye can raise the refractive index of biological fluids to perfectly match surrounding fats and proteins. Graduate researcher Nick Rommelfanger, working under an NSF Graduate Research Fellowship, was one of the first to realize that the same modifications that make materials transparent to microwaves could be tailored to impact the visible spectrum, with potential applications in medicine. Animation depicting the tissue transparency effect and how it might appear if tested with humans in the future. The latter part of the animation shows how photons interact with tissues at the cellular level, both with and without FD & C Yellow 5 saturation. Credit: Keyi “Onyx” Li/U.S. National Science Foundation Harnessing Old Equipment for New Discoveries Transitioning from theory to experimentation, postdoctoral researcher Zihao Ou—the study’s lead author—ordered a number of strong dyes and began the process of meticulously evaluating each for ideal optical properties. Ultimately, the team grew to 21 students, collaborators, and advisors, involving several analytical systems. One that proved critical was a decades-old ellipsometer nestled among newer equipment at the Stanford Nano Shared Facilities, part of the NSF National Nanotechnology Coordinated Infrastructure (NNCI). The ellipsometer is a tool familiar to semiconductor manufacturing, not biology. However, in a possible first for medicine, the researchers realized it was perfect to predict the optical properties of their target dyes. Time-lapse images of blood vessels in the brain just beneath the skull of a sedated mouse, revealed without any surgery, incisions, or damaging the mouse’s bone or skin. By reversibly dyeing the tissues with FD & C Yellow 5 and using a technique called laser speckle contrast imaging, Stanford University researchers observed the blood flow within this living brain. Credit: Stanford University/Gail Rupert/NSF ″Advanced research facilities constantly aim to strike the right balance by providing access to basic tools and expertise while making space for newer, larger, and more powerful instrumentation,″ said NSF Program Officer Richard Nash, who oversees the NSF NNCI. ″While a basic workhorse such as an ellipsometer would rarely make headlines, it nevertheless can play a crucial role when deployed for atypical uses like the case here. Open access to such instrumentation is foundational for making groundbreaking discoveries, as those instruments can be deployed in new ways to generate fundamental insights about scientific phenomena.″ With methods grounded in fundamental physics, the researchers hope their approach will launch a new field of study matching dyes to biological tissues based on optical properties, potentially leading to a wide range of medical applications. ″As an optics person, I’m amazed at how they got so much from exploiting the Kramers-Konig relationship,″ said NSF Program Officer Adam Wax, who has supported Hong’s work. ″Every optics student learns about them, but this team has used the equations to figure out how a strongly absorbing dye can make skin transparent. Using an NSF EAGER grant, Hong was able to step out in a bold new direction, a great example of how fundamental optics knowledge can be used to create new technologies, including in biomedicine.″ Instrumental NSF Support ″NSF′s support played an instrumental role in the success of this work,″ added Hong. ″The NSF CAREER award was my first major funding, and it arrived at a particularly challenging time, during the darkest moments of the pandemic. My lab faced significant difficulties generating data due to the shutdown, and the award was a vital springboard, enabling me to pursue some of our most exciting and innovative projects – including the research that culminated in this Science paper. The flexibility and encouragement from the NSF awards were crucial in keeping me on track and allowed me the freedom to explore new and uncharted territories in my field.″ Please note: The technique described above has not been tested on humans. Dyes may be harmful. Always exercise caution with dyes and do not consume directly, apply to people or animals, or otherwise misuse. For more on this research: Researchers Make Skin Invisible With Common Food Dye Reference: “Achieving optical transparency in live animals with absorbing molecules” by Zihao Ou, Yi-Shiou Duh, Nicholas J. Rommelfanger, Carl H. C. Keck, Shan Jiang, Kenneth BrinsonJr, Su Zhao, Elizabeth L. Schmidt, Xiang Wu, Fan Yang, Betty Cai, Han Cui, Wei Qi, Shifu Wu, Adarsh Tantry, Richard Roth, Jun Ding, Xiaoke Chen, Julia A. Kaltschmidt, Mark L. Brongersma and Guosong Hong, 6 September 2024, Science. DOI: 10.1126/science.adm6869 This research was supported by NSF grants NNCI 1542152 (NNCI), CAREER 2045120, EAGER 2217582, and GRFP 1656518. In addition to NSF, funders supporting the Stanford research included the U.S. National Institutes of Health, the U.S. Air Force Office of Scientific Research, the U.S. Army Long Term Health Education and Training program, and a range of private foundations and institutions. RRG455KLJIEVEWWF |
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