Gene technology allows drosophila sterilization

Mediterranean fruit flies are a kind of harmful insects and they are currently causing millions of dollars in grain losses worldwide every year. Now, biotechnologists have proposed a strategic approach that allows the Mediterranean fruit fly to pair but not give birth, thereby preventing their reproduction. In the "Nature-Biotechnology" published in April, British researchers used transgenic technology to produce a male Mediterranean fruit fly that cannot survive after mating with wild female fruit flies. The tetracycline-inhibiting transactivator protein (tTA) can interact with the antibiotic tetracycline. Taking advantage of this protein, Luke Alphey and colleagues describe a method for controlling the genetic system of the Mediterranean fruit fly. In the presence of tetracycline, tTA is expressed at low levels and is not harmful to the Mediterranean fruit fly; however, when tetracycline is concealed, tTA is expressed at high levels and is sufficient to cause severe developmental damage or death of the insect. Through the introduction of a specially constructed tTA by transgenic technology, researchers have developed a male fruit fly that cannot grow into an adult fruit fly after mating with wild female fruit flies. The current use of insect sterilization is the use of radiation to induce mutations in male fruit flies. Transgenic fruit flies are complementary to this technique. However, radiation sterilization techniques have reduced the sexual attractiveness of male mutants that are mutated, but male fruit flies produced by transgenic technology are less attractive to the opposite sex than normal flies. The Mediterranean fruit fly is one of the world's most dangerous agricultural pests and can attack more than 250 fruits, nuts and vegetables.

Freeze Drying The full name is Vacuum Freeze Drying, also known as Drying by Sublimation. It is used to freeze the liquid material into a solid. Under the conditions of low temperature and pressure reduction, the sublimation performance of ice is utilized, A method to dehumidify the material to achieve the purpose of drying.
Vacuum freeze-drying to a large amount of water-containing substances, pre-cooled to freeze the solid. The water vapor is then sublimed directly from the solids under vacuum while the material itself remains in the ice shelf when it is frozen, so it dries and remains unchanged in volume and becomes porous with good rehydration performance. Freeze-dried vegetables or foods, its most important feature is to retain the color, smell, taste, shape and original nutrients of nutrients, also known as aerospace food, is today's natural, green, safe and nutritious food.

Goji freeze-dried powder

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Production Specification Sheet

Product Name

Goji Powder

Country of Origin

Ningxia in China

ANALYSIS	SPECIFICATTION		TEST METHODS
Product Name	FD Goji Powder	SD Goji Powder	TEST METHODS
Color	Orange-yellow or Orange-red		Organoleptic Inspection
Odor	Characteristic, no other odor		Organoleptic Inspection
Taste	Characteristic		Organoleptic Inspection
Characters/Appearance	Fine particles or powder, slightly caking		Organoleptic Inspection
Impurity	No visible foreign material		Organoleptic Inspection
Loss on drying/Moisture(%)	NMT 10.0	NMT 8.0	GB5009.3
Total Sugar(glucose%)	NLT 40.0	NLT 20.0	GB/T18672
Protein(%)	NLT 4.0	NLT 4.0	GB5009.3
Leads(Pb) mg/kg	NMT 0.5	NMT 1.0	GB5009.12
Arsenic(As) mg/kg	NMT 0.3	NMT 0.5	GB/T5009.11
Total Plate Count(cfu/g)	NMT 30000		GB4789.2
Coliform(MPN/100g)	NMT 90	NMT 30	GB4789.3
Mold(cfu/g)	NMT 25	NMT 20	GB4789.15
Yeast(cfu/g)	NMT 25	NMT 20	GB4789.15
Pathogen	Negative		GB4789.4, GB4789.5, GB4789.10, GB/T4789.11

Shelf Life	12 months if stored in a cool ventilated dry place
Storage	It should be stored under cool, well ventilated, and dry condition
Package	Internal: Double composite bag. External: Carton

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Goji Freeze-Dried Powder

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