圣诞伽蓝菜（学名：Kalanchoe blossfeldiana Poelln.）：又名“长寿花”。多年生, 肉质叶。
Kalanchoe /ˌkæləŋˈkoʊ.iː/, or kal-un-KOH-ee, or kal-un-kee, also written Kalanchöe or Kalanchoë, is a genus of about 125 species of tropical, succulent flowering plants in the family Crassulaceae, mainly native to the Old World. Only one species of this genus originates from the Americas, 56 from southern & eastern Africa and 60 species in Madagascar. It is also found in south-eastern Asia until China.
Most are shrubs or perennial herbaceous plants, but a few are annual or biennial. The largest, Kalanchoe beharensis from Madagascar, can reach 6 m (20 ft) tall, but most species are less than 1 m (3 ft) tall.
Kalanchoes are characterized by opening their flowers by growing new cells on the inner surface of the petals to force them outwards, and on the outside of the petals to close them.
These plants are cultivated as ornamental houseplants and rock or succulent garden plants. This plant is known to the Chinese as “thousands and millions of red and purple” (萬紫千紅), and is commonly purchased during the Chinese New Year for decorative purposes。 They are popular because of their ease of propagation, low water requirements, and wide variety of flower colors typically borne in clusters well above the phylloclades. The section Bryophyllum – formerly an independent genus – contains species such as the “Air-plant” Kalanchoe pinnata. In these plants, new individuals develop vegetatively as plantlets, also known as bulbils or gemmae, at indentations in phylloclade margins. These young plants eventually drop off and take root. No males have been found of one species of this genus which does flower and produce seeds, and it is commonly called, the Mother of Thousands; the Kalanchoe daigremontiana is thus an example of asexual reproduction. These plants are the food plant of the caterpillars of Red Pierrot butterfly. The butterfly lays its eggs on phylloclades, and after hatching, caterpillars burrow into phylloclades and eat their inside cells.
system 2 – lettuce face mask
system 3 – is this a drink or cosmetic thing?
here is one tip known by most gardeners –
Leaves harvested early in the morning, around 7 a.m., contain approximately twice the plant sugars of leaves harvested at 2 p.m.
Clarke Energy has installed two of the latest flexible, high output and efficient GE Jenbacher J624 two-stage turbocharged gas engines at French grower Serres Vinet. They are now able to generate all of the hot water and electricity required for its extensive tomato and lettuce greenhouse operations in Machecoul, in the Loire-Atlantique region. These are the first two-stage turbocharged gas engines in France, and they are the heart of two cogeneration plants powering Serres Vinet’s existing greenhouse operations plus a recent 17-hectare (42-acre) expansion.
The units with GE’s ecomagination-approved combined heat and power solution complement a 13-megawatt (MW) wood biomass-fired boiler and a 20-MW gas boiler and give Serres Vinet the flexibility to switch among electrical energy, thermal energy and fuel sources as economics dictate. Thereby, this allows the customer to generate revenue during the winter months by selling electricity into the public power grid.
Their performance has been so impressive that Forclum, Clarke Energy’s customer on this project and a unit of Eiffage S.A. involved with engineering, procurement and construction, has purchased two additional units from Clarke Energy France. They will be delivered to another French grower’s greenhouse operations. “The efficiency, flexibility and reliability of these two-stage turbo-charged gas engines since they were commissioned in January are outstanding,” said Gilles Marguerat, director of the power production department at Forclum. “We view GE’s Jenbacher gas engines as a powerful tool we can offer our customers to help them gain energy independence and flexibility in operations.” No other gas engine manufacturer currently offers such a super-efficient two-stage turbocharged unit.
Lobsters live up to an estimated 70 years, although determining age is difficult. In 2012, a report was published describing how growth bands in calcified regions of the eyestalk or gastric mill in shrimps, crabs, and lobsters could be used to measure growth and mortality in decapod crustaceans. Without such a technique, a lobster’s age is estimated by size and other variables; this new knowledge “could help scientists better understand the population and assist regulators of the lucrative industry”.
Research suggests that lobsters may not slow down, weaken, or lose fertility with age, and that older lobsters may be more fertile than younger lobsters. This longevity may be due to telomerase, an enzyme that repairs long repetitive sections of DNA sequences at the ends of chromosomes, referred to as telomeres. Telomerase is expressed by most vertebrates during embryonic stages, but is generally absent from adult stages of life. However, unlike most vertebrates, lobsters express telomerase as adults through most tissue, which has been suggested to be related to their longevity. Lobster longevity is limited by their size. Moulting requires metabolic energy, and the larger the lobster, the more energy is needed; 10 to 15% of lobsters die of exhaustion during moulting, while in older lobsters, moulting ceases and the exoskeleton degrades or collapses entirely leading to death.
Lobsters, like many other decapod crustaceans, grow throughout life, and are able to add new muscle cells at each molt. Lobster longevity allows them to reach impressive sizes. According to Guinness World Records, the largest lobster ever caught was in Nova Scotia, Canada, weighing 20.15 kilograms (44.4 lb).