Carnivorous plant study captures universal rules of leaf making — ScienceDaily

Leaves display a remarkable range of forms from flat sheets with simple outlines to the cup-shaped traps found in carnivorous plants. A general question in developmental and evolutionary biology is how tissues shape themselves to create the diversity of forms we find in nature such as leaves, flowers, hearts and wings. Study of leaves has led to progress in understanding the mechanisms that produce the simpler, flatter forms. But it’s been unclear what lies behind the more complex curved leaf forms of carnivorous plants. Previous studies using the model species Arabidopsis thaliana which has flat leaves revealed the existence of a polarity field running from the base of the leaf to the tip, a kind of inbuilt cellular compass which orients growth. To test if an equivalent polarity field might guide growth of highly curved tissues, researchers analysed the cup-shaped leaf traps of the aquatic carnivorous plant Utricularia gibba, commonly known as the humped bladderwort. The team of Professor Enrico Coen used a combination of 3D imaging, cell and clonal analysis and computational modelling to understand how carnivorous plant traps are shaped. These approaches showed how Utri...

Nissan雙箭齊發 Leaf與Altima上市【壹路飆】

Nissan同步發表純電動車Leaf與旗艦轎跑Altima。純電動車Leaf採單一車型,建議售價新台幣149萬元;旗艦轎跑Altima則採雙車型,建議售價為新台幣116.9 萬元與128.9萬元。 新一代Leaf裝載日產獨家電池科技40kWh鋰電池,最長行駛距離可達311公里,搭配DC直流充電只需40分鐘,便能將電池充到8成電量,購車即贈送價值新台幣5萬元AC交流家用充電設備。在外觀方面,Leaf車頭極具流線與科技感,搭載造型新穎的LED頭燈,並以V-motion家族設計搭配專屬3D環保藍色冰塊造型水箱護罩。車身則藉由模擬實際空氣流動環境,進行空氣力學開發,垂直切削兼具導流和隔絕噪音設計的兩側車體,搭配具擾流功能尾翼,降低氣流阻力,減少風阻所造成的能源損耗。 此外,Leaf乘坐空間寬敞舒適,後車廂空間高達435L,內裝鋪陳展現綠能環保概念,座椅採用可回收特殊不織布材質。儀錶板採用7吋多功能LED螢幕,可顯示各項主被動安全設定及電力里程相關資訊;中控台配備8吋彩色懸浮觸控螢幕,讓車主輕鬆操作影音功能。新穎的電動車專屬排檔旋鈕,更進一步地凸顯操作介面科技感,讓車主操駕更為直覺簡單。 更重要的是,新車搭載了Nissan Intelligent Mobility全方位智行科技,擁有完整的行車安全配備,包含IEB防追撞緊急煞車系統、ICC智慧型定速系統、LDP車道偏離預防系統、AVM360度環景影像系統、BSW盲點警示系統及RCTA後方車側警示系統等,帶給車主安心全面的行車守護。 在動力方面,Leaf發電機輸出功率達85kW,最大馬力14...