Please select the most similar patent number from A, B, C and D. Which number is?
A dendrobium preservation method: using a two-way stretching polypropylene film to seal dendrobium, wherein a packaging bag formed by using said two-way stretching polypropylene film is provided with certain air permeability; packaging by using such a material may build an environment having low oxygen and high carbon dioxide, inhibit a respiratory effect of the dendrobium, and, when combined with a low temperature storage environment, may effectively delay aging. In addition, storing dendrobium in a refrigerated environment of 0°-5° may slow the dendrobium becoming mildewy, prolong the storage time of the dendrobium, and maintain the commercial and nutritional value of the dendrobium.
A: The present invention relates to a dendrobium officinale oligosaccharide and a derivative thereof, and preparation methods therefor and applications thereof. The main technologies are: the dendrobium officinale oligosaccharide contains 3-9 glycoside residues and has a glucose residue at a non-reducing end, and the derivative thereof is obtained by substituting hydrophobic residues at the non-reducing end. Also provided are preparation methods and applications of the dendrobium officinale oligosaccharide and the derivative thereof. The beneficial effects of the present invention are: the dendrobium officinale oligosaccharides having a purity of 99% or more is prepared from dendrobium officinale for the first time; the structure, anti-aging effect, and immunoregulation effect of the dendrobium officinale oligosaccharide are defined; and the dendrobium officinale oligosaccharide can well inhibit the collagen protease and also has certain activity on TNF-α and IL-6. The present application can be used in the fields of medicine, food, and daily necessities development.
B: Disclosed is a method for retaining the freshness of medicinal materials, the method comprising the following steps: the harvested fresh medicinal materials are sorted, comprising the shearing and cleaning of the fresh medicinal materials; after the fresh medicinal materials are sterilized, same are air-dried; the fresh medicinal materials are put in contact with a preservative, and are air-dried; and the fresh medicinal materials are packaged with packaging materials. A PBAT/PLLA composite breathable film can properly prevent the loss of moisture of the fresh medicinal materials, and effectively block out contamination from the external environment. The total number of bacterial colonies, mold colonies and Escherichia coli of the medicinal materials preserved by the method, when the microbial test experiment lasts one month, is under the national standard, can properly inhibit growth of the bacterium, etc., and the fresh medicinal materials have good appearance characteristics and stay in a fresh state, and small packages of fresh slices required by clinics are obtained.
C: Disclosed is a Dendrobium-planting concrete column (1), comprising an above-ground section (11) and an underground section (12). The above-ground section comprises a groove (13) encircling the column, wherein the groove is used to plant the Dendrobium seedling. Also disclosed is a planting system, comprising the concrete column, a sunshade net (2) above the concrete column and a micro jet device (4). The concrete column decreases the planting cost, and raises the product quality of the Dendrobium. Also disclosed is a corresponding Dendrobium planting method.
D: Involved are a fluorescence PCR detection kit for identifying Dendrobium officinale Kimura et Migo and the use thereof. The kit comprises specific primers and a specific probe for Dendrobium officinale Kimura et Migo, and the nucleotide sequences thereof are as shown in SEQ ID NOs. 1-3. The nucleotide sequences of the dendrobium universal primers and universal probe are as shown in SEQ ID NOs. 4-6. Carrying out PCR amplification by using the fluorescence PCR detection kit can identify Dendrobium officinale Kimura et Migo and other dendrobium plants. The kit pairs the specific fluorescence probe and the template, has a high specificity and selectivity, and has a high amplification efficiency, sensitivity and accuracy, good reproducibility, and short detection cycle. The detection can be completed within 1.5 hours. The kit can detect the DNA amplification reaction in real time, and has very high feasibility and application prospects, ensuring the place of real Dendrobium officinale Kimura et Migo in the market of traditional Chinese medicine.
Answer: B