Light and shade

Light: Adaptations for Shade

[The human being: light and shade].

tetizar o cotidiano nos seus mais singulares detalhes. Movimentos expressos em cores vibrantes fazem surgir imagens, até as imperceptíveis. Linhas e manchas constituem corpos. Contornos irregulares e imprecisos indicam trajetórias inesperadas. Para mim, arte é expressão da vida e com isso importa afetar pela sensação.” Com essas palavras a artista plástica gaúcha Denise Marcolin define suas obr...

Influence of light source and clinical experience on shade matching

INTRODUCTION Shade is one of the most important attributes when evaluating the success of a restoration. Several factors can influence the visual shade matching process, and therefore the outcome of the final restoration. OBJECTIVES 1. to assess the importance of clinical experience on shade matching accuracy; 2. to assess the influence of two standard light sources on the ability to match sh...

Light-Shade Adaptation : TWO STRATEGIES IN MARINE PHYTOPLANKTON.

Using chlorophyll/P700 ratios, the size and number of photosynthetic units were estimated, as a function of light-shade adaptation in two species of marine phytoplankton: Skeletonema costatum, a diatom, and Dunaliella tertiolecta, a chlorophyte. In the diatom, light-shade adaptation is characterized primarily by changes in the size and not the number of P700 units, whereas in the chlorophyte, o...

Light-Induced Indeterminacy Alters Shade-Avoiding Tomato Leaf Morphology.

Plants sense the foliar shade of competitors and alter their developmental programs through the shade-avoidance response. Internode and petiole elongation, and changes in overall leaf area and leaf mass per area, are the stereotypical architectural responses to foliar shade in the shoot. However, changes in leaf shape and complexity in response to shade remain incompletely, and qualitatively, d...