Heinrich HoffmanHeinrich Hoffman was Adolf Hitler's personal photographer, and most of the rare photos we see of Hitlers now are from his hands. In 1929, 17-year-old Eva worked in his photo studio. At that time, he was a special photographer for Adolf.
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Hoffman, a mathematicianHoffman was an American scientist named Roald Hoffmann, born in 1937 in Poland.He was a famous scientist in the United States. He graduated from the Chemistry Department of Colombia University in 1958 and received a Ph.D. in quantum chemistry in 1962. He developed the Huckel molecular orbital method proposed by Wolfsberg and others, and used it to deal with organic molecules. He worked with Woodward to analyze and summarize the rules of the cycloidal reaction using molecular orbital theory. In 1965, the two proposed the principle of conservation of molecular orbital symmetries, which was one of the important achievements of theoretical organic chemistry at this stage. He also devoted himself to the study of the electronic structure of the ground state and excited state molecules. He made outstanding contributions to solid and surface chemistry and won the Nobel Prize in Chemistry in 1981.
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The characteristics of red leaf heatherPhotinia glabra was the general name for the hybrid species of the Photinia species in the Rosaceae family. It had the following characteristics:
1. ** Botanic characteristics **
- ** Plant form **: Evergreen shrubs or small trees. The plant can reach up to 6 meters tall. The branches are grayish brown and do not have long hair. It can also appear as an evergreen small tree (6 - 15 meters tall) or a shrub (1.5 - 2 meters tall). The young branches are brown, with short hair, then purple-brown, and finally gray without hair. The branches have small thorns.
- ** Leaf characteristics **: Leaves alternate, long oval, obovate-shaped oval, tender leaves are bright red, the surface of the new leaves is shiny, thick like leather, the leaves are obovate-shaped or lanceolate-shaped, relatively small, the length is generally about 5 - 10 cm, the width is about 2 - 5 cm, the edge of the leaves has a circle of small serrations.
- ** Flower and Fruit **: The flower is a compound corymb, the color is white; the fruit is red or brownish-purple, and the shape is spherical.
2. ** Ornamental characteristic **
- ** Leaf color **: The tender leaves in early spring are red. The new shoots and tender leaves are bright red and lasting, beautiful and eye-catching. In summer, they appear bright green. If they are trimmed before the National Day, the new leaves in autumn will still be bright red.
- Flowers and fruits: The flowering period is from May to July. From May onwards, the top inflorescence grows densely at the end of the branch like an umbrella. It is especially white against the shiny leaves. It is better in that there are many and dense flowers.
- ** Style **: Can be trimmed into various shapes, excellent landscape effect, can be used as a tree, hedges, etc., can also be used in residential areas, factory green space and other places.
3. ** Adaptability **
- ** Strong environmental adaptability **: Shade-resistant, drought-resistant, low-temperature-resistant, likes sunny, warm, humid environments. In China, it is mainly distributed in East China, Central South and Southwest China. It is introduced and cultivated in Hunan, Hubei, Yunnan, Anhui, Shandong, Hebei and other places. It is distributed in Southeast and East Asia, and in the subtropics and temperate-zone areas of North America such as China, Japan, the United States, New Zealand, and the Netherlands.
- ** Strong resistance and extensive management **: Able to adapt to a variety of environments, can be planted in different soil and climate conditions, and has strong resistance to cold and drought.
4. ** Other characteristics **
- ** Well-developed root system **: Can effectively prevent soil erosion, is a good protective forest species.
- ** Fragrant **: The flowering period is long, the flowers are small and dense, and the fragrance is assaulting the nose. There is also a faint fragrance during the tender leaf period.
- ** Commercial Value **: Can be used to make bonsai. In the China market, there are Red Robin, Red Lips, Strong, Rubens, and other main varieties. It can also be used for garden construction.
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