The abbreviated structure of the storage polysaccharide starch; just a short segment shown (starch is a long, potentially infinite, polymer of alpha-glucose molecules). Unbranched starch, like the one drawn here, is called amylose. Drawn in Inkscape 生物學 化學 食品 澱粉
A ball-and-stick model structure of acidic (negatively-charged) amino acid glutamic acid (Glu, E). Carbon in blue-grey, oxygen in red, nitrogen in green, hydrogen in silver. Drawn in Inkscape 酸 酸性 氨基 谷氨酸 (氨基酸)
A ball-and-stick model structure of polar amino acid asparagine (Asn, N). Carbon in blue-grey, oxygen in red, nitrogen in green, hydrogen in silver. Drawn in Inkscape 酸 氨基 氨基酸 天冬醯胺 (氨基酸)
Vector illustration of a realistic piece of leather. Small holes covering the surface of the leather object, darker lines with stitches on the top and bottom parts of the image. Free vector illustration for all fashion, accessories, leather goods, style, wallets, purses and clothing design materials projects 背景 傢俱 平鋪 現實的皮革
自由半色調向量紋理準備將深度添加到您的數碼作品。網目調結構是偉大的設計片段,任何的插畫師,平面設計師,網站擁有者和向量的演出者。與這些偉大的半色調圖形創建獨特的海報、 摺頁冊、 包裝、 標籤、 cd 或 dvd 封面佈局 那些 模式 現代 半色調向量紋理
Public Domain Source http://commons.wikimedia.org/wiki/File:Pyridoxine_structure_ver2.svg 化學 吡哆醇 結構 吡哆醇結構
Set of four building vectors under construction. I hope you can use these four building vectors in your projects 卡通 街 城市 Construction Vector Buildings Pack
Free industrial equipment free vector graphics image activity architecture black built bulldozer business cable construction contour contractor coreldraw crane design development elevator equipment exterior vector graphics graphic heavy high illustration illustrator industrial industry isolated 工業設備免費
Public Domain Source http://commons.wikimedia.org/wiki/File:Tc99_sestamibi_2D_structure.svg tc99_sestamibi_2d_structure 化學 TC99 司他米比二維結構
Vector illustration of styled Decorative urban background. Files included - Vector EPS 8 file, Illustrator 8 file and JPEG included. http://www.vectorsquare.com/vectors/free-vectors 塗鴉 建築物 橫幅 City Design Vector Banner
Concept vector with abstract gear wheels, vector illustration eps-10 做廣告 廣告 背景 Concept vector with abstract gear wheels
Death and anatomy vector footage of human skeletons. Silhouettes of skeletons of people with different body structure and a skeleton standing on his hands. Free vectors for anatomy, bone structure, bones and death visuals. Graphics for your educational images and adverts 骨 骨骼 剪影 人類骨骼圖形
Concept vector with abstract gear wheels, vector illustration eps-10 做廣告 廣告 背景 Concept vector with abstract gear wheels
Technology vector art illustration of futuristic abstract design elements for your digital art backdrop, business concepts, computer and technology stock footage collection, electrical circuit, geometric shapes, modern layout, techno wallpaper or network graphics 現代 抽象 技術 Technology Structure
Looking for a fun home pattern? This house pattern vector could be used for real estate visiting card design ideas or for backgrounds on real estate websites. Enjoy 城市 鎮 房子 Real Estate Home Patterns
Free urban structures design in scalable vector graphics .svg vector and adobe illustrator .ai vector 電纜 建設 電力 Urban Structures
Free free city vector graphics design in encapsulated postscript .eps vector and adobe illustrator .ai vector 體系結構 橋 建築物 Free City
Download free psychedelic vector graphics, trippy background effects, 60s pop art artworks and swirling images. Pay homage to the psychedelic music and art scene of the Sixties with this groovy vector footage pack with cool circles, swirls and geometric shapes designs 時髦 結構 幾何 Psychedelic Graphics
C'est L'amour! A hand drawn illustration of the Eiffel Tower together with 2 cute doves holding a ribbon banner. Download for free and enjoy! It would be great if you leave a comment below and let me know what you think, thanks! Designed exclusively for Vecteezy.com 樹木 街 剪影 Free Hand Drawn Eiffel Tower
Abstract gear wheels with light bulb, vector illustration eps-10 做廣告 廣告 背景 Abstract gear wheels with light bulb