2338 Results for: "Kyselina+giberelová"

Supplier: Honeywell Chemicals

LabReady™ Solvent Blends

Supplier: Merck

(±)-4-Hydroxy-3-methoxymandelic acid, Sigma-Aldrich®

Supplier: MP Biomedicals

Sodium 1-heptanesulfonate is a commonly used ion pairing reagent for HPLC, including analyses of peptides and proteins. It has also been used in high performance capillary electrophoresis analysis of peptides.

Supplier: MP Biomedicals

L-Ascorbic Acid is used as an Antimicrobial and Antioxidant in foodstuffs. Reductant for the isolation of chloroplasts. It has an effect on the nonspecific immune system. Preserves nitric oxide (NO) which may help prevent endothelial dysfunction. It also helps prevent and reverse the oxidative damage done to proteins and lipids as a result of cigarette smoke.

Supplier: VWR Chemicals

Animal-free amino acid. Polar. Acidic.

Supplier: VWR Chemicals

, HiPerSolv CHROMANORM® for LC-MS

Supplier: Hach

Gallic acid solution for conductivity testing. Used to neutralise hydroxide ion interference.

Supplier: Thermo Fisher Scientific

L(+)-Glutamic acid 98.5-101.5% (dry basis), Ultrapure

Supplier: VWR Chemicals

, HiPerSolv CHROMANORM® for LC-MS

Supplier: MP Biomedicals

Chloroplatinic acid is used in potassium determination, purification of platinum and in catalysis.

Supplier: Merck

For calibration of pH meters.

Supplier: VWR Chemicals

, HiPerSolv CHROMANORM® for LC-MS

Supplier: Merck

trans-1,2-Diaminocyclohexane-N,N,N',N'-tetraacetic acid monohydrate, Sigma-Aldrich®

Supplier: Thermo Fisher Scientific

Thermo Scientific Pierce Ellman's Reagent (DTNB) reacts with sulfhydryl groups to yield a colored product, providing a reliable method to measure reduced cysteines and other free sulfhydryls in solution.

Supplier: Thermo Fisher Scientific

trans-1,2-Diaminocyclohexane-N,N,N',N'-tetraacetic acid monohydrate 98%

Supplier: Merck

Methanolic HCl (hydrogen chloride in methanol) is particularly useful for preparing methyl esters of volatile (short chain) fatty acids. Fatty acids are esterified by heating them with an anhydrous alcohol in the presence of an acidic catalyst in a sealed vessel at a high temperature for a short time. In the reaction, a fatty acid molecule and an alcohol molecule are joined, with the release of a water molecule. The derivatives can be quickly and easily recovered, quantitatively, from the reaction medium.

Supplier: HELLMA

The Hellma® calibration standards comply with all necessary standards and regulations and thus offer the highest quality for recalibrating your spectrometer.

Supplier: G-Biosciences

Ellman's reagent is a versatile, water-soluble compound for quantifying free sulfhydryl groups in solution. It reacts with a free sulfhydryl group to yield a mixed disulfide and 2-nitro-5-thiobenzoic acid (NTB), a measurable yellow colored product at 412nm.
Ellman's reagent is very useful as a free sulfhydryl assay reagent due to its high specificity for -SH groups at neutral pH, high molar extinction coefficient and short reaction time.

Supplier: MP Biomedicals

Citric acid acts as an iron chelator. It can support cholesterol/sterol, ubiquinone and isoprenoid biosynthesis in cell culture applications. In animals, citric acid improves the utilization of nutritional calcium. It is a useful buffer component.

Supplier: Merck

trans-1,2-Diaminocyclohexane-N,N,N',N'-tetraacetic acid monohydrate, Sigma-Aldrich®

Supplier: Merck

Titriplex® IV (trans-1,2-Diaminocyclohexane-N,N,N',N'-tetraacetic acid monohydrate) analytical reagent, Supelco®

Supplier: Cayman Chemical

Saturated fatty acids are synthesised by both plants and animals from acetyl coenzyme A as a form of long-term energy storage. Palmitic acid is a common 16-carbon saturated fat that represents 10-20% of the normal human dietary fat intake, and approximately 25% of the total plasma fatty acids in plasma lipoproteins. Saturated free fatty acids induce the expression of cyclooxygenase-2. Palmitic acid methyl ester (MP) is a fatty acid ester whose concentration in cells is modulated by methanol. In studies with isolated Kupffer cells, MP inhibits phagocytosis and decreases cell viability. In cells treated with lipopolysaccharide, it also decreases secretion of interleukin-10, TNF-α, nitric oxide, and prostaglandin E2. This effect is thought to occur by the inhibition of NF-κB.

Supplier: Merck

Accurate analytic results in UV/Vis and infrared spectroscopy depend on the use of very pure solvents for sample preparation. The Uvasol® solvents range has been specially designed for spectroscopy and other applications requiring solvents of the highest spectral purity. The refinement process allows a greater degree of security in applications and avoids misinterpretation of analytical results caused by traces of UV, IR and fluorescence contamination. Uvasol® solvents offer best UV transmittance. In all specifications the minimum transmittance for five typical wavelengths are identified. Furthermore the transmittance is specified in accordance with Reag. Ph. Eur. and ACS.

Supplier: Merck

Acid Fuchsin is mainly used as a diachrome and is part of the connective tissue stains. It also works as a pH indicator.

Supplier: MP Biomedicals

Trichloroacetic acid is used in protein precipitation; has been used to determine protein concentration by quantitative precipitation. Used as a decalcifier and fixative in microscopy. A protocol for the precipitation of nucleic acids can be found in Molecular Cloning.
Stability: Long term storage of aqueous solutions of less than 30% strength is not recommended. Decomposition products are chloroform, hydrochloric acid, carbon dioxide and carbon monoxide. Chloride ≤0.001% ; Nitrate ≤0.002%; Phosphate ≤5 ppm; Sulfate ≤0.02%

Supplier: Merck

, LiChrosolv® for liquid chromatography, Supelco®

Supplier: VWR Chemicals

Trichloroacetic acid glacial Ph. Eur.

Supplier: Avantor

The J.T.Baker® BAKERBOND® PolyABx multimode ion exchange (IEX) chromatography resin functions as a weak cation exchange resin with improved selectivity for superior separation in process chromatography applications.

Supplier: Thermo Fisher Scientific

Hafnium Standard, 1000 mg/L, Hafnium, Matrix: 5% HF, Application: AAS standards

Supplier: Thermo Fisher Scientific

Zirconium Standard, 1000 mg/L, Zirconium, Matrix: 5% HF, Application: AAS standards