Some applications of Hygromycin B

Hygromycin B long-term feeding mouth can effectively control the pig tapeworm, esophagus nematodes and MAO nematode infection, this is because the product is not only effective for adult and larvae, but also can restrain the female worms lay eggs, so that the loss of insect body ability to reproduce. So. Pregnancy sow, hygromycin B is added to the full price feed, can protect the piglets in lactation period is not affected by ascaris infection. Hygromycin B is recommended for: prenatal 6 weeks and lactation sow; Less than 6 months of age piglets (most susceptible to worms).

Hygromycin B of chicken chicken roundworm, variations of renewal closed capillary nematode worm and birds all have good control effect.

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From:Lactic acid bacteria

Sodium Fusidate some effect

Sildenafil acid Sodium (Sodium Fusidate), white crystalline powder, solvent is a colorless and transparent liquid. Ingredient for the west to acid sodium, its chemical name is: alpha acetoxyl group of 16-3 beta, 11 beta 2 beta hydroxy - 4, 8 beta, alpha - trimethyl - 18 - to 14-5 beta, alpha cholesteric 10-17 (z) - 17 (20), 24 - diene - 21 - acid sodium,, west to sodium by inhibiting bacterial protein synthesis and produce sterilization effect, of a series of gram positive bacteria have strong antibacterial effect. Staphylococcus aureus, including to penicillin, methicillin and other antibiotic resistant strains, all our products are highly sensitive. , west acid sodium and clinical use of no cross resistance between other antimicrobial agents.

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From:Lactic acid bacteria

The role of Actidione

Actidione is a process of protein biosynthesis in eukaryotes have inhibition effect of the compound, it is gray Streptomyces (Streptomyces griseus) of a product. It by interfering with translocation steps in the process of protein synthesis and hinder the translation process. In the study of biological pharmacy cycloheximide is often used to inhibit protein synthesis of biological eukaryotic cells in vitro. This method is very effective, fast, and cheap. And by cycloheximide to remove from the test tube can quickly to cancel it.

Because cycloheximide has very strong toxicity, including damage to DNA, causing malformation fetus, and other effects of reproduction, including birth obstacles and toxicity of sperm), it is generally only used in vitro research applications, it is not suitable in the human body used as antimicrobial. In the past it was used as a fungicide in agriculture, but due to the increasing awareness of the dangers of it the usage has been rarely.

Alkali can destroy cycloheximide, so if the countertop or container is cycloheximide pollution as long as the use of harmless after alkali solution (such as soap) washing is ok.

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From:Lactic acid bacteria

Some of the role of Polyaluminium Chloride

Polyaluminium chloride is a kind of inorganic polymer flocculant, is referred to as "for poly aluminum, abbreviations for PAC, due to the effect of bridge of the hydroxyl ions and polyvalent anions polymerization production, charge higher molecular weight of inorganic polymer water treatment agent. On the form and can be divided into two kinds of solid and liquid, and solid according to different colors is divided into brown, yellow and white, different colors of polyaluminium chloride on the application and production technology is also a larger difference between the two.

role

Poly aluminum chloride (us) its flocculation performance is as follows:

A strong electric neutralization, colloidal substance in water.

B, the hydrolysate of suspended solids in water adsorption good bridging.

C, selective adsorption of soluble substances.

Polyaluminium chloride is a kind of inorganic polymer coagulant, due to the effect of bridge of the hydroxyl ions and polyvalent anions polymerization production, charge higher molecular weight of the characteristics of inorganic polymer water treatment agents, mainly determined by the working principle of pressure atomizer.

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From:metal materials

The basic information of the Sancycline

CAS no. : 808-26-4

English name: Sancycline

English synonyms: GS 2147; Bonomycin; NSC - 51812. Norcycline; SANCYCLINE; Sancycline Hydrochloride; 6 - Demethyl - - deoxytetracycline; (as 4 s, 4, 5 ar, 12 as) - 4 - (Dimethylamino) - 3, 11,10,12,12 a - tetrahydroxy - 1 -,4,4 dioxo - 1 a, 5, 5 a, 6 of the final three a - octahydro - 2 - naphthacenecarboxamide; (as 4 s, 4, 5 ar, 12 as) -,4,4 4 - (Dimethylamino) - 1 a, 5, 5 a, 6 of the final three a - 3,10,12,12 octahydro - a - tetrahydroxy - - 11 - dioxo 1-2 - naphthacenecarboxamide

Chinese name: mountain ring

English synonyms: mountain ring element; Ring element; Go armour ammonia tetracycline

CBNumber: CB0420370

Molecular formula: C21H22N2O7

Molecular weight: 414.41

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From:Lactic acid bacteria

What is G418 SulfateGeneticin?

G418 is an aminoglycoside antibiotic , the molecular genetic tests , is the most commonly used stably transfected resistance screening reagents. By inhibiting the transposon Tn601, Tn5 gene ribosome interference function block protein synthesis, such as prokaryotic and eukaryotic cells to produce toxins , including bacteria , yeast, plant and mammalian cells , including protozoa and worms. When the neo gene was integrated into the DNA of eukaryotic cells , the neo gene is able to start the coding sequence is transcribed into mRNA, which acquired resistance to aminoglycoside phosphotransferase product efficient expression , the cells which acquired resistance selection in G418 containing of the growth medium . This selection features G418 , has been in gene transfer , gene knockout , transgenic animals resistance screening and other aspects can be widely applied .
Shipped at room temperature , dry storage at room temperature , soluble in water , methanol , and the solution stored at -20 ℃ eukaryotic cell lines because each different sensitivity to G418 , or the lines of the new cell lines stably transfected with non- stable transfection Kill cells required amount will need to experiment optimized. Optimum dosage curve obtained through the establishment of cell death . The cells were diluted to 1000cell/ml, adding 100ul per well of 24-well plates with the medium , the G418 concentration in each well diluted to 0,100,200,300,400,500,600,700,800,900,1000,1100 ug / ml in 12 levels , cultured for 10-14 days in all cells death lowest concentration as a benchmark, usually around 400-800 , screening than this concentration no matter how high a level to maintain the use of filtering half the concentration can be.


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From:Lactic acid bacteria

BOC-L-Asparagine nature of the introduction

Chinese Name : BOC-L- asparagine
Chinese Synonyms : N- t- butoxycarbonyl -L- asparagine ; BOC-L- asparagine ; N (α) - tert- butoxycarbonyl -L- asparagine ; protected amino acid ; BOC-L- asparagine amide ; BOC- asparagine ; N-(Α)-BOC-L- asparagine acid; tert-butoxycarbonyl group - asparagine
Product Name : BOC-L-Asparagine
English Synonyms : T-BUTYLOXYCARBONYL-L-ASPARAGINE; TBOC-L-ASPARAGINE; N-TERT-BUTOXYCARBONYL-L-ASPARAGINE; NT-BUTOXYCARBONYL-L-ASPARAGINE; NT-BOC-L-ASPARAGINE; N2-[(1,1 -Dimethylethoxy) carbonyl]-L-asparagine; NALPHA-BOC-L-ASPARAGINE; N-ALPHA-T-BOC-L-ASPARAGINE
CAS No. : 7536-55-2
Molecular formula : C9H16N2O5
Molecular Weight: 232.23
EINECS Number: 231-405-2
Related Categories : Amino Acid Derivatives; Amino Acids; amino acids ; Asparagine [Asn, N]; Boc-Amino Acids and Derivative; Amino Acids (N-Protected); Biochemistry; Boc-Amino Acids; Boc-Amino acid series; amino acids and their derivatives ; biochemical reagents ; biochemicals ; amino acids ; Heterocycles
Mol File : 7536-55-2.mol
Melting point 175 ° C (dec.) (lit.)
Refractive index -7 ° (C = 1, DMF)
Storage conditions -20 ° C
Chemical Properties white crystalline substance ; soluble in DMF, insoluble in petroleum ether ; decomposition point of 175-180 ℃; Specific rotation [α] 20D-9 ° (0.5-2 mg / ml, DMF).
Use for peptide synthesis , as protected amino acids monomers.
Production methods with tert -butoxycarbonyl chloride ( or azide ) and L- asparagine as a raw material, and then acidified with citric acid acylation , recrystallization products.

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From:Biochemical Reagent

Sodium hypochlorite Introduction

Sodium hypochlorite, chemical formula NaClO, is sodium hypochlorite. Sodium hypochlorite, hypochlorous acid produced by the reaction with carbon dioxide is the active ingredient in bleach.
Indications: Root canal irrigation.
Drug Category: Dental treatment - other commonly used drugs [1]
Risk category: corrosive substances
Pathways: inhaled, ingested, percutaneous absorption
Health hazards: frequent hand contact with the product of the workers, palms sweating, nail thinning, hair loss. This product has sensitization. This product may cause the release of chlorine poisoning.
Environmental hazards: No significant pollution.
Explosion Hazards: This product is flammable, corrosive, can cause the body burns, with sensitivity.
Dosage: Rinse the root canal, with 1 ~ 2ml, 1% ~ 5.25% of the solution, rinse, while washing edges attract.


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From:Metal Cleaning Agent

Basic chromic sulfate use and preparation

Purpose:
Basic chromic sulfate is mainly used for tanning leather . Raw material for the production of chromium hydroxide . Industrial dye used in the production of reactive black dye . Printing and dyeing industry as a mordant .
Preparation :
Basic chromic sulfate production methods are mainly organic reduction and sulfur dioxide reduction . Sodium dichromate organic reduction mother liquor solution of sodium hydrogen sulfate (40 ~ 42 ° Bé) or sulfuric acid in a lead-lined or glass-lined reactor equipped with a stirrer with stirring , after acidification , the reducing agent is added slowly with stirring sucrose , the reduction of hexavalent chromium , the reaction solution was maintained at the end of boiling , is conducive to complete the reaction.
The reaction product is viscous syrupy solution, add water, the solution concentration was adjusted to 40 ~ 42 ° Bé, first by natural cooling , then the cooling crystallizer chilled to below 10 ℃ , so that part of sodium sulfate crystals to generate mirabilite , centrifugal separation , the system product liquid is obtained basic chromium sulfate , and then concentrated and dried to obtain a solid product of basic chromium sulfate . Its
8Na2Cr2O7 +48 NaHSO4 + C12H22Ol1 → 16Cr (OH) SO4 +32 Na2SO4 +43 H2O +12 CO2 ↑
8Na2Cr2O7 +24 H2SO4 + C12H22O11 → 16Cr (OH) SO4 +8 Na2SO4 +27 H2O +12 CO2 ↑


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From:pharmaceutical chemicals

Wire Netting types

Barbed wire (Wire Netting), mainly for the tardy action infantry and vehicles , sub- fixed and mobile -two. Barbed wire is fixed stakes and barbed wire , etc. to build from ; mobile barbed wire is mass-produced and shipped from the factory to the battlefield to temporarily set a diameter of 70-90 cm, length 10 meters , set the speed, anti- destruction of high strength, armored cars and other vehicles can be tardy action . Lift the barbed wire, people often think of the battlefield , prisons, border lines, and special scenes. Indeed, barbed wire , once invented , it was widely used in military and defense projects ; now in peacetime , the barbed wire is also widely used .

Barbed wire type
Barbed wire production process is divided into: braided , spot type Chela type , punching , wrap-around , screwed into sex , anchor type, etc. collectively referred to as wire or steel mesh .
Barbed wire further development and growth , with many of today's species such as : fence, fence, crimped wire mesh, wire mesh, welded wire mesh, welded mesh , welded wire mesh, crimped wire mesh , wire fence ; mesh , etc.
Barbed wire Related Products: flood control flood control with barbed wire : gabion , gabion mesh , plastering mesh, gabion , honeycomb grid , eco- grid, eco- cage , reinforced road networks, port engineering network, retaining walls, green grid , heavy hexagonal . Traffic safety with barbed wire : highway fence , highway fence, airport fence , rail fence, bridge fence , plant fence, stadium fence, workshop and warehouse fence, fence construction sites , residential fence . Farming planting with barbed wire : Dutch mesh, chain link fence, diamond mesh . Mine with barbed wire : underground metal mesh , coal graticule , coal use mesh, mine safety nets, Mine Support Network , Mine Safety Support Network , mine mesh, barbed wire mines , coal barbed wire, woven wire mesh coal , coal plain weave mesh .
Welded wire mesh , welded wire mesh is made ​​of high quality Q195 low carbon steel wire , welded row , then cold-plating ( electroplating ) , hot dipped , PVC plastic bag , such as surface passivation, plastics processing , flat surface , mesh mesh uniform, solid solder joint , local good machining performance , stability , corrosion resistance, corrosion resistance grid mesh products. In welded wire mesh galvanized after forming ( electroplating or hot dip ) ; product is made ​​of high quality galvanized iron wire through sophisticated automated machinery welded . Has a solid solder joint , reasonable structure , mesh uniform characteristics , flat surface , firm structure , strong integrity , strong corrosion resistance can also be used in the construction of floor heating special mesh . Now available at many domestic areas are widely used


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From:metal materials