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The research on identification and protection of vine jujube has made progress
br4p And the morphological evidence clarified that the pinnate-veined Tengzao is the real Tengzao, and the so-called "Tengzao" with three veins is actually a member of the newly recorded Chinese genus (Sangguchi) of the Fangji family. Related research results were published in Taxon .
The correct identification of endangered species is a prerequisite for effective protection. However, vines, especially large woody vines, have rare flowers or fruits in the wild. It is extremely difficult to identify them based on nutritional traits alone, and misidentification often occurs. For example, the Tengzao of the Fangji family is a rare and endangered plant in my country, but which plant is the real Tengzao has long been controversial.
- "China Science News"
2
Anhui Guangde first discovered the Chinese alligator natural spawning
Recently,During the field patrol, the staff in the Zhucun area of Guangde Alligator Sanctuary in Anhui Province discovered for the first time that a Chinese alligator released from the wild had laid a litter of eggs, totaling 18 eggs. According to the staff, this is the first time that crocodile nest eggs have been discovered in Guangde in 20 years.
From 2020, a total of 77 artificially bred Chinese alligators will be released. In the next step, Guangde will do a good job of daily monitoring and protection of the ovaries of alligators to ensure the normal hatching of young alligators, continuously optimize the ecological environment of the reserve, and quickly rejuvenate wild alligator populations.
- "Guangming Daily"
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scientists found that target pests by symbiotic virus to adapt to Bt crops
Recently, the research team of the Institute of Plant Protection of the Chinese Academy of Agricultural Sciences and the Shenzhen Institute of Genomics of the Chinese Academy of Agricultural Sciences, Lancaster University and other units have made important progress in the field of insects and symbiotic microorganisms. . Related results were published online in the international journal elife .
Bt cotton has been planted in China for more than 20 years. The impact of changes in the planting structure of this crop on target pests, non-target pests, natural enemies, and symbiotic microorganisms is a very important scientific issue. Studies have found that a symbiotic virus, HaDV2, is widely present in the target pest of Bt cotton, the cotton bollworm, and can obtain high fitness and Bt tolerance by regulating genes related to the immune pathway of the cotton bollworm.
- "China Science News"
4
first genetically modified marsupials successfully cultivate
▲ The Biosystem Dynamics Research Center of the Institute of Physics and Chemistry of Japan successfully bred the first genetically modified marsupial through genetic engineering, the opossum. Image source: Eurekalert website
Researchers from the Biosystem Dynamics Research Center of the Institute of Physics and Chemistry in Japan have bred the first genetically modified marsupial through genetic engineering, the opossum. Related papers were published in the recent "Contemporary Biology" journal,It will help decipher the unique genetic information only observed in marsupials.
Genetically modified animals, especially mice and rats, are extremely important objects for studying biological development. Marsupials have unique characteristics, and possums are considered to be the ancestor of all marsupials and the first marsupials to complete whole-genome sequencing. The size and reproduction characteristics of opossums are similar to those of mice and rats, so they are by far the best animal model choice.
- "Science and Technology Daily"
5
British researchers have invented a super insulator
"Reference News" published a report on the US "Popular Science" website on July 26, "The world's worst thermal conductor may be a pattern-changing factor in the climate crisis." The summary is as follows:
Researchers from the University of Liverpool in the United Kingdom invented a material. Researchers say that the thermal conductivity of this material is almost the lowest among all solid materials that humans have ever mastered. This research direction sounds a bit strange,But it is not the case-a material with extremely low thermal conductivity is a super insulator, and materials like this can play an important role in achieving net zero emissions of greenhouse gases globally. The researchers recently published their research results on the website of "Science" weekly.
- "Science and Technology Daily"
6
scientists to determine the crust of Mars by analyzing Martian Earthquake structure
▲ Image source: World Wide Web
, according to the analysis of the Mars InSight mission recorded by NASA The structure has now been precisely determined for the first time. Below the landing site of InSight, the crust is about 20 or 39 kilometers thick. This is the result of an international research team led by Dr. Brigitte Knapmeyer-Endrun, a geophysicist from the Institute of Geology and Mineralogy at the University of Cologne and Dr. Mark Panning from the Jet Propulsion Laboratory of the California Institute of Technology (Caltech).
InSight is an abbreviation for "internal exploration using seismic surveys, geodesy, and heat transfer."This NASA lander landed on Mars on November 26, 2018, exploring the crust, mantle and core of the red planet. On July 23, 2021, "Science" magazine published the paper "The Thickness and Structure of Mars Crust from InSight Seismic Data".
——Global Network
Source: Today's Association for Science and Technology WeChat Official Account
.Drives the development of science and technology workers and organizations at all levels for innovation In order to improve the scientific quality of the whole people and serve the party and the government's scientific decision-making service, promote the construction of open, hub, and platform science and technology associations. Take over the arm, take root at the grassroots level, unite and lead the vast number of scientific and technological workers to actively march into scientific and technological innovation, organize and carry out innovative scrambling actions, promote the prosperity and development of science and technology, promote the popularization and promotion of science, and truly become a people's organization that unites and connects the vast number of scientific and technological workers under the leadership of the party. Become an important force for technological innovation. ——Xi Jinping
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