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    Akhiran -ena digunakan dalam kimia organik untuk membentuk penamaan senyawa organik yang mana gugus -C=C- diberi prioritas tertinggi menurut aturan tata nama organik. Kadang-kadang, sebuah angka di antara tanda hubung disisipkan sebelumnya untuk menyatakan bahwa ikatan rangkap terjadi antara atom tersebut dan atom dengan nomor berikutnya. Akhiran ini berasal dari akhiran kata etilena, yang merupakan alkena paling sederhana. Akhiran "-a" pada "-ena" dihilangkan jika diawali dengan akhiran yang diawali dengan huruf vokal, misalnya "-enal", yaitu senyawa yang mengandung sebuah ikatan -C=C- dan sebuah gugus fungsi aldehida. Jika akhiran lainnya dimulai dengan huruf konsonan atau "u", akhiran "-a" tetap ada, misalnya "-enadiuna" (yang memiliki akhiran "-ena" dan juga akhiran "-una", untuk senyawa dengan satu ikatan rangkap dan dua ikatan rangkap tiga.)
    Awalan angka Yunani sebelum "-ena" menunjukkan berapa banyak ikatan rangkap yang ada dalam senyawa tersebut, misalnya butadiena.
    Akhiran "-ena" juga digunakan dalam kimia anorganik untuk menunjukkan lapisan atom dua-dimensi setebal satu atom, seperti pada grafena, silisena, stanena, borofena, xenzofena, dan germanena.


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    Tata nama organik IUPAC


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Emergency Nurses Association | Home

Join ENA and expand your knowledge, your network, and your impact on emergency nursing. Members are a part of a community of more than 50,000 emergency nursing professionals around the world.

ENA University | Home

ENA University offers access to ENA's robust portfolio of nursing education and resources, including the all-new Career Pathways. To learn more about ENA's industry-leading ENPC, TNCC and other courses, click below.

Emergency Nursing 2025 - ena.org

Emergency Nursing 2025 is headed to New Orleans for the biggest emergency nursing event of the year. Join ENA Sept. 17-20 for education and more.

ENA University \ Catalog

ENA University brings it all together in one dynamic learning platform. Explore the endless opportunities that ENA University offers to support your emergency nursing career. From student nurse to advanced practice, your journey awaits with ENA University.

ENA Browser - EMBL-EBI

Jul 15, 2020 · The new ENA Browser (https://www.ebi.ac.uk/ena/browser/home) has been running in parallel to our old Browser (https://www.ebi.ac.uk/ena) since mid 2019. Read more >

Ena (Animated Series) | ENA Wiki | Fandom

An Ena (also spelled as ƎNA) is a titular protagonist in the ENA series. This Ena, who has a blue and yellow colored body, the protagonist of Season 1 of the series. An Ena is a feminine humanoid character with a dual-colored body, her right …

ENA (series) | ENA Wiki - Fandom

ENA, also formatted as ƎNA, is a Peruvian avant-garde animated comedy series, created by Joel Guerra and published on YouTube and Newgrounds. The series combines 2D and 3D animation and draws inspiration from many pieces of surrealist media and worldwide culture, particularly from Peru and Japan.

Emergency Nurses Association - Wikipedia

The Emergency Nurses Association (ENA) is an international professional organization representing emergency nursing. Consisting of nearly 50,000 members, ENA addresses issues relevant to emergency care, publishes professional guidelines, provides education for emergency nurses and issues a peer-reviewed journal.

2025 Hawai'i Emergency Nurses Association Conference

Registrations are open! Get ready for an action-packed day of learning and connection! Our event features expert-led sessions on ocean-related injuries, cutting-edge trauma care, crisis response strategies, toxicology, and powerful insights from frontline and battlefield experiences—all paired with exciting networking opportunities with vendors.

ENA Membership

ENA members have access to a wide variety of exclusive benefits focused on strengthening your knowledge, connecting you to the emergency nursing community and helping you take your practice to the next level. Explore ENA's most popular member benefits: