Features of nano Silver powder

Nano silver power is a kind of new high technology products, It has very strong antimicrobial and kill bacterial functions, so it widely  use for antimicrobial products, for example , it can kill  coli bacillus and staphylococcus aurous and many other microbe. melting point is  100℃, it can make conductive paste and sinter under low temperature.
Silver powder was fabricated by spray pyrolysis, using 2%–20% AgNO3 solution, 336–500 mL/h flux of AgNO3 solution, 0.28–0.32 MPa flux of carrier gas and in the 620–820 °C temperature range. The effects of furnace set temperature, concentration of AgNO3 aqueous solution, flux of AgNO3aqueous solution as well as carrier gas on the morphology and particle size distribution of silver powder, were investigated. The experimental results showed that with the high concentration of AgNO3 aqueous solution, the average grain size of silver decreased with the increasing of furnace set temperature. But the gain size distribution was not homogenous, the discontinuous grain growth occurred. With the low concentration of AgNO3 aqueous solution, the higher furnace set temperature made the nano sliver grains sintered together to grow. Nano silver powder about 100 nm was fabricated by spray pyrolysis, using 2wt% AgNO3 solutions, 336 mL/h flux of AgNO3 aqueous solution, 0.32 MPa flux of carrier gas at 720 °C furnace set temperature.

what is HATU ?

HATU was first reported by Louis A. Carpino in 1993 as an efficient means of preparing active esters derived from 1-hydroxy-7-azabenzotriazole (HOAt). HATU can exist as either the uronium salt (O-form) or the less reactive iminium salt (N-form). HATU was initially reported as the O-form (1) using the original preparation reported by Carpino; however, X-ray crystallographic and NMR studies revealed the true structure of HATU to be the less reactive guanidinium isomer (2). It is, however, possible to obtain the uronium isomer by preparing HATU using KOAt in place of HOAt and working up the reaction mixture quickly to prevent isomerisation.

Chemcial Name:O-(7-Azabenzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate
CAS NO.:148893-10-1
Molecular Formula:C10H15F6N6OP
Molecular Weight:380.23
Appearance:White crystal powder
Melting Point:183~189℃(dec.)
Purity (HPLC):99.5%min
Loss on Drying: ≤0.5%
Heavy Metals: ≤20ppm
Storage:Store in tight containers in cool and dry place
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About 6-Chloropurine

The 6-Chloropurine, with its CAS NO 87-42-3, is a kind of light yellow crystalline powder. It has synonyms of 1H-Purine, 6-chloro- (9CI);6-Chloro-1H-purine;1H-Purine, 6-chloro-;SK 6048;Purine, 6-chloro-;X 47;6-chloro-5H-purine;6-CP;6-Chloro purine 98%;NSC-744 PVC Pigment Dispersion Chips. 6-Chloropurine should be stored in shady cool warehouse.
IUPAC Name: 6-chloro-7H-purine
InChI: InChI=1S/C5H3ClN4/c6-4-3-5(9-1-7-3)10-2-8-4/h1-2H,(H,7,8,9,10)
InChIKey: ZKBQDFAWXLTYKS-UHFFFAOYSA-N
Canonical SMILES : C1=NC2=C(N1)C(=NC=N2)Cl
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The use of Erlotinib hydrochloride

Erlotinib hydrochloride (trade name Tarceva) is a drug used to treat non-small cell lung cancer (NSCLC), pancreatic cancer and several other types of cancer. It is a reversible tyrosine kinase inhibitor, which acts on the epidermal growth factor receptor (EGFR).
Erlotinib is an EGFR inhibitor. The drug follows Iressa (gefitinib), which was the first drug of this type. Erlotinib specifically targets the epidermal growth factor receptor (EGFR) tyrosine kinase, which is highly expressed and occasionally mutated in various forms of cancer. It binds in a reversible fashion to the adenosine triphosphate (ATP) binding site of the receptor.[1] For the signal to be transmitted, two EGFR molecules need to come together to form a homodimer. These then use the molecule of ATP to trans-phosphorylate each other on tyrosine residues, which generates phosphotyrosine residues, recruiting the phosphotyrosine-binding proteins to EGFR to assemble protein complexes that transduce signal cascades to the nucleus or activate other cellular biochemical processes. By inhibiting the ATP, formation of phosphotyrosine residues in EGFR is not possible and the signal cascades are not initiated.
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what is Mesterolone ?

Mesterolone is an orally applicable androgen, and DHT derivative. It is sold under the brand name Proviron (as Provironum in Asia-Pacific region), by Bayer Schering Pharma (earlier by Schering). In the late 70's and early 80's it was used with some success in controlled studies of men suffering from various forms of depression. Mesterolone is a relatively weak androgen and rarely used for replacement therapies.Mesterolone had seen widespread use in bodybuilding primarily for antiestrogenic activity in anabolic steroid stacks but such use has declined after introduction of aromatase inhibitors and SERMs. Most significant benefits of current Mesterolone use are considered to be maintaining libido off-cycle and also relatively and temporarily improving vascularity.
Mesterolone belongs to the group of medicines known as androgens, which are male sex hormones. It is used to treat disorders in men where the body does not make enough natural androgen. It works by supplementing the amount of male hormone your body produces naturally.

what is Oxytetracycline ?

Oxytetracycline is an antibacterial medicine. This means that it stops infections caused by bacteria. It is prescribed to treat acute bacterial infections, such as chest infections, urine infections, skin infections, and mouth infections. It is also prescribed for some longer-term skin conditions, such as acne and rosacea.
Oxytetracycline, like other tetracyclines, is used to treat many infections, both common and rare (see Tetracycline antibiotics group). Its better absorption profile makes it preferable to tetracycline for moderately severe acne at a dosage of 250–500 mg four times a day for usually six to eight weeks at a time, but alternatives should be sought if no improvement occurs by three months. Avoid milk, iron, zinc or indigestion remedies while taking Oxytetracycline. Take before food or on an empty stomach.
Along with their useful effects, most medicines can cause unwanted side-effects although not everyone experiences them. The table below contains some of the most common ones. You will find a full list in the manufacturer's information leaflet supplied with your medicine. The unwanted effects often improve as your body adjusts to the new medicine, but speak with your doctor or pharmacist if any of the following continue or become troublesome.

Berberine chloride hydrate

Berberine chloride hydrate occurs as yellow crystals or crystalline powder.It is odorless or has a faint,characteristic odor.It has a very bitter taste.It is sparingly soluble in methanol,sightly soluble in ethanol and very slightly soluble in water.
Berberine chloride hydrate is an alkaloid derived from Chinese goldthread, bark of cork tree and other plants. It can be also synthesized in artificial method. It is used as raw material to make preparations, which are usually administered the treatment of intestinal infections. Category Bitter stomachic, Antibacterial.
CAS No.:141433-60-5
Synonyms: 5,6-Dihydro-9,10-dimethoxybenzo[g]-1,3-benzodioxolo[5,6-a]quinolizinium chloride hydrate
Molecular formula:  C20H18NO4.Cl.H2O
Molecular weight:  389.83
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