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483 matches found for filtration

SOLVO® Vesicular Transporter Assays

Membrane preparations for vesicular transport assays are suitable for general drug-efflux transporter interaction studies. Both substrate and inhibitor interactions can be assessed using membrane vesicles prepared from mammalian cell lines over-expressing key human transporters. Human efflux transpo...

Round-Bottom Flasks

Filtration • Flat-Bottom • Round-Bottom • Multi-Neck • Schlenk • Septum-Inlet • Accessories On this page: Round-bottom flasks • Jacketed round-bottom flasks • Round-bottom distilling flasks • Pear shaped flasks • Recovery flasks • Dimple flasks Round-bottom flasks Cap. (mL) S.T. Joint Catalog Number...

Filter Membrane Selection Recommendations

What are you filtering out? What do you want to keep? Pick the right membrane for your filtration. More Cell Culture info at: sigmaaldrich.com/cell-culture Return to Cell Culture Videos homepage Related Links • Cell Culture Product • Stericup® and Steritop® Filter Units • Corning® Bottle-top Filters...

Recovery & Sample Cleanup of Pesticides in Spinach Using Supelclean ENVI-Carb-II/PSA SPE

Related Articles • Extraction of Permethrin Pesticides from Spinach Using QuEChERS Methodology with Automated Shaking • Extraction and Analysis of Neonicotinoid Pesticides from Flower Blossoms • Rapid Cleanup of Spinach Extracts Using Gravity Elution SPE Prior to Pesticide Analysis • Increase Remova...

Schlenk Flasks - Sigma-Aldrich Glassware Catalog

Filtration • Flat-Bottom • Round-Bottom • Multi-Neck • Schlenk • Septum-Inlet • Accessories On this page: Kjeldahl reaction and storage flasks • Reaction and storage tubes • Solvent storage flasks Schlenk storage vessels have a 2mm glass stopcock. The side-arm accommodates a septum (use Z10,072-2 or...

Biochemical / Biotechnical

Download PDF Product Name PDF file size No. of Pages Subject T195875 Bulletin 875 849 KB 40 Supelco Capillary Column Selection Guide T196898-90 Bulletin 898 (Spanish Version) Supelco Capillary Column Selection Guide Supelco Capillary Column Selection Guide Supelco Capillary Column Selection Guide T1...

Septum-Inlet Flasks - Sigma-Aldrich Glassware Catalog

Filtration • Flat-Bottom • Round-Bottom • Multi-Neck • Schlenk • Septum-Inlet • Accessories On this page: Round-bottom flasks with septum-inlet Storage flasks with stopcock-equipped septum-inlet Round-bottom flasks with septum-inlet With ground-glass joint. Use septum Z10,072-2 or Z12,435-4. Flask s...

Removal of Detergents from Biological Product Matrices

Most modern biopharmaceutical research and manufacturing requires the use of one or more detergents. Detergents are amphipathic molecules having both hydrophilic and hydrophobic properties. These unique properties are used to alter the interactions between biological molecules in aqueous solutions. ...

Filtration Flasks - Sigma-Aldrich Glassware Catalog

Filtration • Flat-Bottom • Round-Bottom • Multi-Neck • Schlenk • Septum-Inlet • Accessories On this page: Aldrich filter flasks • Pyrex heavy-wall filtering flasks Filtration bottles • Aldrich 75mm o-ring bottles Aldrich filter flasks A. 1,000mL reservoir flasks with hose barb. S.T. Joint Catalog Nu...

retinol binding protein 4, plasma
Synonyms RDCCAS
Species Human (5950) , Species Mouse (19662) , Species Rat (25703) , Species fruit fly (41668) , Species Zebrafish (30077) , Species chicken (396166) , Species Horse (100049790) , Species domestic cat (101094377) , Species dog (477775) , Species cow (281444) , Species sheep (101105458) , Species domestic guinea pig (100725967) , Species naked mole-rat (101701666) , Species Domestic Rabbit (100009161)
Summary: This protein belongs to the lipocalin family and is the specific carrier for retinol (vitamin A alcohol) in the blood. It delivers retinol from the liver stores to the peripheral tissues. In plasma, the RBP-retinol complex interacts with transthyretin which prevents its loss by filtration through the kidney glomeruli. A deficiency of vitamin A blocks secretion of the binding protein posttranslationally and results in defective delivery and supply to the epidermal cells. [provided by RefSeq, Jul 2008]

HybriScan™ Test Kits for Legionella Detection

Legionella contamination in air conditioners and water supply systems poses a serious health concern. Sigma-Aldrich® offers traditional media and innovative, award-winning kits for the specific, rapid, and reliable detection of this pathogen. Legionella is a Gram-negative, rod-shaped bacterium commo...

Solubility enhancement using PEG-polyester diblock copolymers for drug delivery

One of the common difficulties with intravenous drug delivery is low solubility of the drug. The requirement for large quantities of saline to dissolve such materials limits their clinical use, and one solution for this problem that has recently generated interest is the formation of drug-loaded mic...

Purification of Histidine-Tagged Proteins using TALON Superflow

Extracted from Affinity Chromatography Vol. 2: Tagged Proteins, GE Healthcare, 2016 TALON® Superflow consists of highly cross-linked agarose beads with an immobilized chelating group precharged with Co2+ ions. The medium binds polyhistidine-tagged proteins with high selectivity and exhibits a reduced...

Common Cell Culture Problems: Cell Death

Related Links • Troubleshooting Guide Home • Poor Cell Growth • Precipitates • Poor Cell Attachment • Cell Clumping • Contamination • Cell Line Misidentification Related Products • Culture media • Fetal Bovine Serum (FBS) • Mycoplasma Detection • Culture Flasks • Trypsin • Antibiotics • Hoechst Stai...

Selection Guide for Polymeric Resins in Chromatography & Purification

Related Products • Adsorbent Media (Polymeric) • Cation Exchange Media Related Content • Adsorbents for use as Purification Media • Custom Resin Processing & Packaging • Custom Media, Columns, Cartridges for LPLC Sigma-Aldrich carries a vast array of resins, from leading manufacturers; such as, Dow ...

Chromatography Column Sizing Chart

What size column do I need? Use this handy chart to determine what size column is required and estimate the typical fraction and sample size. Column Size (mL) Fraction Size (mL) Sample size Filtration Separation 200 10 5 1-2 400 20 10 3-5 600 30 20 5-8 100 50 30 10 2000 100 60 20-30 4000 150-200 100...

Common Cell Culture Problems: Contamination

Overview Types of Contamination Common Causes and Prevention of Contaminants Microbial (bacteria, fungi, yeast) Mycoplasma Viral Contamination Chemical Contamination General Tips and Techniques Working within the Biological Safety Cabinet Pipetting and Prevention of Aerosols Disinfection Although ‘c...

Filter Funnels - Sigma-Aldrich Glassware Catalog

On this page: Vacuum-jacketed filter funnel • Pressure filter/drying funnels Pressure filter/drying funnel assemblies with removable fritted disc Pressure filter funnels • Fritted filter funnels Ace pressure filter/drying funnels • Aldrich Kramer filter Vacuum-jacketed filter funnel 200mL, 50mm frit...

Purification Solutions

Experience the best available portfolio of innovative Purification technologies enabling the future of biomanufacturing. Clarification Single-use and multi-use products for the successful development and implementation of robust clarification processes. Chromatography We offer safe, integrated and i...

Water for Clinical Chemistry

In the clinical laboratory, water is a key factor. There are two significant reasons for the importance of water in the clinical setting: the need to comply with norms or guidelines (e.g., those of the Clinical and Laboratory Standards Institute® – CLSI®)1 and the sensitivity of the chemistries them...

Vascular Pericytes

Figure 1. Vascular pericyte overview. Pericytes surround blood vessel capillaries and endothelial cells, neurons and astrocytes within the blood-brain-barrier (BBB) neurovascular unit. Pericytes, also known as mural cells, are multipotent perivascular cells that play an important role in the develop...

HPLC sample preparation – a study using Whatman™ brand filtration devices

Sample preparation methods for HPLC analysis have the potential to influence analytical results. Disposable devices can alter the sample in several ways. For example, they can release extractables into the sample, bind analytes nonspecifically, or retain liquid. This white paper presents experimenta...

Investigating Matrix Interference in Analysis of Antiarrhythmic Cardiac Drugs in Plasma

For efficient therapeutic drug monitoring, it is important for clinicians to have access to fast and robust analytical methods for accurate assessment of drug efficacy. Industrial trends toward highly specific LC/MS applications over traditional immunoassay have resulted in the need for high-speed c...

Vacuum Adapters

Connecting • Reducing/Enlarging • Septum-Inlet • Specialty • Tubing • Vacuum On this page: Vacuum adapters • Stopcock adapters • Transfer adapters High-vacuum valve adapters • Gas-inlet adapters Distilling adapters • Filtration adapters Vacuum adapters Inner joint with side-port S.T. Joint Catalog N...

Amicon® Ultra Centrifugal Filters

Related Products • Protein Purification & Detection • Centrifugation Supplies • Proteomics • Western Blotting • Amicon® Pro Purification System On this page: • Unmatched performance of Amicon® Ultra filters • How to select an Amicon® Ultra filter • Protocols using Amicon® Ultra filtration products •...

Chromatography, HPLC - Sigma-Aldrich Glassware Catalog

HPLC • LC • TLC On this page: Four Valve Caps • Three Valve Caps •Three Hole Caps • Accessories Features: • Safety coated with autoclavable PVC • Protects light sensitive materials to 385nm • Fingertip controls for easy, precise control • Specially designed valves and connections assure leak free op...

Beverage & Water Microbiology Testing

Learning Center Discover our Beverages and Water Microbiology testing solutions Hot Topics • Quick learning: Testing for E.coli and coliforms in drinking water acc. ISO 9308-1 • On-demand webinar: spoilage and sterility tests in beverages and revised IFU method no.12 • Webinar: beer analysis without...

Universal Protease Activity Assay: Casein as a Substrate

A. Abstract Proteases break peptide bonds. It is often necessary to measure and/or compare the activity of proteases. This non-specific protease activity assay may be used as a standardized procedure to determine the activity of proteases for quality control purposes. In this assay, casein acts as a...

Multisample filtration of small volumes using the Samplicity® system

With advances in high performance liquid chromatography (HPLC) and ultra-high pressure liquid chromatography (UHPLC), analytical separations have become more and more sensitive, meaning that smaller and smaller sample injections are sufficient to provide required data. At the same time, the use of s...

ESHMUNO® CP-FT Resin

Explore Efficiency The first strong cation exchange chromatography resin that is specifically designed for efficient mAb aggregate removal in flow-through mode. Benefits Increased performance • Superior removal of mAb aggregates in the flow-through mode of operation • High product recoveries at high...

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