145128 Results for: "(\u00B1)-Tetrahydrofurfuryl+bromide&pageNo=10&view=easy"

Supplier: MP Biomedicals

Storage: Store at +4 °C, store under nitrogen
Glutathione is the major low molecular weight thiol compound of the living plant or animal cell. It is a tripeptide with a gamma peptide linkage between the amine group of cysteine (which is attached by normal peptide linkage to a glycine) and the carboxyl group of the glutamate side-chain. It is an antioxidant, preventing damage to important cellular components caused by reactive oxygen species such as free radicals and peroxides. The sulfhydryl (thiol) group (SH) of cysteine serves as a proton donor and is responsible for the biological activity of glutathione.
Glutathione suppresses human immunodeficiency virus expression in chronically infected monocytic cells. It is a useful tripeptide involved in many aspects of metabolism, including transport of g-glutanyl amino acids and reductive cleavage of disulfide bonds.
Endogenous antioxidant that plays a major role in reducing reactive oxygen species formed during cellular metabolism and the respiratory burst. Glutathione-S-transferase catalyzes the formation of glutathione thioethers with xenobiotics, leukotrienes, and other molecules that have an electrophilic center. Glutathione also forms disulfide bonds with cysteine residues in proteins. Via these mechanisms, it can have the paradoxical effect of reducing the efficacy of anti-cancer agents.

Supplier: MEMMERT

The range has natural and forced convection models with a temperature range up to 80 °C. There is a choice of two different displays, SingleDISPLAY or TwinDISPLAY depending on the application.

Supplier: HUBER

Circulating bath thermostats with baths made from stainless steel are simple to use and suitable for many applications such as: sample temperature control, analysis, material testing or checking food. The units offer high temperature stability and are fitted with over-temperature and low level protection suitable for use with flammable fluids. A powerful pressure/suction pump ensures optimum circulation and temperature homogenity in the bath and also allows temperature control of external applications using a pump adapter (accessory). There is a range of optional accessories including inserts, variable adjustable platforms, bath covers, probes as well as tubing, temperature-control fluids and various adapters, please see www.vwr.com for details.

Supplier: Thermo Fisher Scientific

In order to maintain cellular viability during the freezing process, certain cells such as protist, mammalian, and plant cells require precise control of the freezing rate in order to minimize the detrimental effects of undercooling and the heat liberated during the phase change process from water to ice. The Thermo Scientific™ CryoMed™ Controlled-Rate Freezers (CRFs) are designed with reliability, protection, and data traceability in mind for sample preparation and GMP production needs.

Supplier: Thermo Fisher Scientific

Thermo Scientific Pierce SMCC is a hetero-bifunctional crosslinker that contain N-hydroxysuccinimide (NHS) ester and maleimide groups that allow covalent conjugation of amine- and sulfhydryl-containing molecules. NHS esters react with primary amines at pH 7–9 to form amide bonds, while maleimides react with sulfhydryl groups at pH 6.5–7.5 to form stable thioether bonds. In aqueous solutions, NHS ester hydrolytic degradation is a competing reaction whose rate increases with pH. The maleimide group is more stable than the NHS-ester group, but will slowly hydrolyze and lose its reaction specificity for sulfhydryls at pH values > 7.5. For these reasons, conjugations with these crosslinkers are usually performed at pH 7.2–7.5, with the NHS ester (amine-targeted) reacted before or simultaneous with the maleimide (sulfhydryl-targeted) reaction.

Supplier: OMEGA BIO-TEK

Gel purification of DNA is a common technique used for the isolation of specific DNA fragments. However, most methods either fail to completely remove agarose (which can lead to problems in downstream manipulations), shear the DNA, or result in very low yields.

Supplier: Sartorius Balances

The Cubis® II laboratory balances are modular, therefore they allow to choose between applications and configurations which suit the best to the needs. These balances can be configured at the level of display, draftshields, software applications and hardware functions.

Supplier: OMEGA BIO-TEK

The E.Z.N.A.® SQ blood DNA kit provides a reliable method for the isolation of high molecular weight genomic DNA from fresh, frozen, or anti-coagulated whole blood. The method can also be used for preparation of genomic DNA from buffy coat, bone marrow or cultured cells. There is no need for phenol/chloroform extractions, and time consuming steps such as CsCl gradient ultracentrifugation are eliminated. DNA purified using the E.Z.N.A.® SQ blood DNA method is ready for downstream applications such as PCR, southern blotting and restriction enzyme digestion.

Supplier: Thermo Fisher Scientific

Thermo Scientific Pierce EDC is a carboxyl- and amine-reactive zero-length crosslinker. EDC reacts with a carboxyl group first and forms an amine-reactive O-acylisourea intermediate that quickly reacts with an amino group to form an amide bond with release of an isourea by-product. The intermediate is unstable in aqueous solutions and so two-step conjugation procedures rely on N-hydroxysuccinimide (NHS) for stabilization. Failure to react with an amine will result in hydrolysis of the intermediate, regeneration of the carboxyl, and release of an N-substituted urea. A side reaction is the formation of an N-acylurea, which is usually restricted to carboxyls located in hydrophobic regions of proteins.

Supplier: ProSci Inc.

This antibody is specific to Complement 4d (C4d) and it reacts with the secreted as well as cell-bound protein. C4d is a degradation product of the activated complement factor C4b. Complement 4b is typically activated by binding of antibodies to specific target molecules. Following activation and degradation of the C4 molecule, thio-ester groups are exposed, which allow transient, covalent binding of the degradation product C4d to endothelial cell surfaces and extracellular matrix components of vascular basement membranes near the sites of C4 activation. The presence of C4d in peritubular capillaries is a key indicator for acute humoral (i.e. antibody-mediated) rejection of kidney, heart, pancreas and lung allografts. As an established marker of antibody-mediated acute renal allograft rejection and its proclivity for endothelium, this component can be detected in peritubular capillaries in chronic renal allograft rejection as well as hyperacute rejection, acute vascular rejection, acute cellular rejection, and borderline rejection. C4d has been shown to be a significant predictor of transplant kidney graft survival. C4d antibody, combined with antibody to C3d, can be utilized as a tool for diagnosis of allograft rejection that may warrant a prompt and aggressive anti-rejection treatment.

Supplier: ProSci Inc.

This mAb recognises a protein of 41 kDa, which is identified as TDP2, or ETS1 associated protein II. It is a member of a superfamily of divalent cation-dependent phosphodiesterases. The encoded protein associates with CD40, tumor necrosis factor (TNF) receptor-75 and TNF receptor associated factors (TRAFs), and inhibits nuclear factor-kappa-B activation. This protein has sequence and structural similarities with APE1 endonuclease, which is involved in both DNA repair and the activation of transcription factors. DNA repair enzyme that can remove a variety of covalent adducts from DNA through hydrolysis of a 5'-phosphodiester bond, giving rise to DNA with a free 5' phosphate. catalyses the hydrolysis of dead-end complexes between DNA and the topoisomerase 2 (TOP2) active site tyrosine residue. Hydrolyzes 5'-phosphoglycolates on protruding 5' ends on DNA double-strand breaks (DSBs) due to DNA damage by radiation and free radicals. The 5'-tyrosyl DNA phosphodiesterase activity can enable the repair of TOP2-induced DSBs without the need for nuclease activity, creating a 'clean' DSB with 5'-phosphate termini that are ready for ligation. Has also 3'-tyrosyl DNA phosphodiesterase activity, but less efficiently and much slower than TDP1. May also act as a negative regulator of ETS1 and may inhibit nuclear factor-kappa-B activation.

Supplier: BioAir S.p.A.

Safemate ECO+ Cabinets are supplied in four different sizes (0.9, 1.2, 1.5 and 1.8). These last generation Microbiological Safety Cabinets Class II type A2, have been certified according to the most stringent safety standards (EN 12469-2000). The internal design, the air flow aerodynamics and monitoring, the built-in safety devices and the very accurate manufacturing, guarantees the highest performances at the most stringent safety levels, as specified by EN 12469 standard and have been certified by the most prestigious European certification bodies for Safety Cabinets.

Supplier: MP Biomedicals

FastRNA® Pro Red Kit is used to isolate total RNA from yeast and fungi. Isolated RNA is suitable for RT-PCR analysis and other downstream applications

Supplier: Thermo Orion

Easy to use and budget friendly instrument for a wide range of applications and advanced pH analysis in the lab. Ideal for simple, routine pH, mV and temperature measurements.

Supplier: ProSci Inc.

Hemagglutinin Monoclonal Antibody: Influenza A virus is a major public health threat, killing more than 30,000 people per year in the USA. Novel influenza virus strains caused by genetic drift and viral recombination emerge periodically to which humans have little or no immunity, resulting in devastating pandemics. Influenza A can exist in a variety of animals; however it is in birds that all subtypes can be found. These subtypes are classified based on the combination of the virus coat glycoproteins hemagglutinin (HA) and neuraminidase (NA) subtypes. During 1997, an H5N1 avian influenza virus was determined to be the cause of death in 6 of 18 infected patients in Hong Kong. The more recent virulent strain of H5N1 is now seen in Africa and Europe, as well as in southeast Asia. There is some evidence of human to human spread of this virus, but it is thought that the transmission efficiency was fairly low. HA interacts with cell surface proteins containing oligosaccharides with terminal sialyl residues. Virus isolated from a human infected with the H5N1 strain in 1997 could bind to oligosaccharides from human as well as avian sources, indicating its species-jumping ability. While efforts were made to use relatively conserved regions of the viral sequence as the antigen, the influenza virus genome has drifted somewhat from what was first reported. However, this antibody was able to recognize peptides derrived from viruses from Indonesian human patients infected in 2007.

Supplier: Biotium

The DNA Gel Extraction Kit is a silica-gel, spin column based DNA extraction kit designed to purify 40 bp to 40 kb DNA fragments from agarose gels in TAE or TBE buffer.

Supplier: VITLAB

Volumetric flask, PMP, class A, with stopper NS 12/21, PP, 50 mL 1 * 2 items

Supplier: DUPERTHAL

Exhaust air monitor optional with ventilator: Easy ventilation and monitoring of the venting system for safety cabinets. A sensor monitors the air flow speed/stream and gives a visual or audible signal if the value drops below the set-point value. The complete exhaust monitoring unit is supplied pre-assembled (ready to plug in) and is placed directly on the cabinet. The set-point value for the air stream flow rate is preset in the factory and can be individually adjusted by the pressure difference socket. In addition to the volumetric flow rate the power supply is also monitored. The system includes two floating contacts (24 V/2 A) for signal transmission to an external control room. Internal storage accumulator supplies the monitoring systems for 4 hours in the event of a power failure, display with easy fault indication and enables permanent monitoring according to DIN EN 1946-7. The housing is made from powder-coated sheet steel, silver pearl glimmer.

Supplier: Testo

Testo 871s thermal imager together with our experienced professionals to enable you to work quickly and easily with professional thermal imaging technology. Generates error-free and objectively comparable infrared images using its handy functions. The IFOV warner, testo ɛ-Assist and testo ScaleAssist mean can avoid measurement errors and not only effortlessly achieve optimum setting of emissivity (ɛ) and reflected temperature (RTC) for building thermography, but also of colour scale. This combines high infrared resolution with professional measuring performance and easy handling. Its high-quality pixel detector, an integrated digital camera and, last but not least, the innovative functions are the features that impress. The testo Thermography App enables the testo 871s to offer smart thermography to meet professional requirements in industry and trade. The case supplied with the thermal imager means it can be conveniently transported.

Supplier: Amarell

Viscometer therm., ähnlich Engler, similar DIN, 0+200:1°C, enclosed scale, cap. prismatic, colourless, red special liquid, 300x6mm, 90mm immersion, with swelling, Richter-top finish, without button, suitable for government verification 1 * 1 items

Supplier: Thermo Fisher Scientific

Thermo Scientific Pierce DSP (Lomant's Reagent) is a water-insoluble, homo-bifunctional N-hydroxysuccimide ester (NHS ester) crosslinker that is thiol-cleavable, primary amine-reactive, and useful for many applications. DSP contains an amine-reactive NHS ester at each end of an 8-carbon spacer arm. NHS esters react with primary amines at pH 7–9 to form stable amide bonds and releasing N-hydroxy-succinimide. Proteins, including antibodies, generally have several primary amines in the side chain of lysine (K) residues and the N-terminus of each polypeptide that are available as targets for NHS ester crosslinking reagents. DSP is non-sulfonated and insoluble in water, so it must first be dissolved in an organic solvent and then added to the aqueous reaction mixture. Because DSP does not possess a charged group, it is lipophilic and membrane-permeable and so useful for intracellular and intramembrane conjugation. A sulfonated analog of DSP (DTTSP) is water soluble. DSS, the non-cleavable analog of the DSP crosslinker is also available for applications that require a stable spacer arm that cannot be cleaved in the presence of reducing agents.

Supplier: OMEGA BIO-TEK

RNA-Solv® Reagent is a one reagent system for the isolation of total RNA from cells and tissues. The reagent, a single-phase solution consisting of phenol and guanidine isothiocyanate, is a modification of the single-step RNA isolation method developed by Chomczynski and Sacchi. The sample is homogenised and lysed in RNA-Solv® Reagent, which maintains the integrity of the RNA while disrupting and denaturing endogenous RNases and other cellular components. Extraction of the lysate with chloroform further denatures proteins and separates the mixture into an organic and an aqueous phase. RNA remains exclusively in the aqueous phase, and is subsequently recovered by isopropanol.

Supplier: MP Biomedicals

Folic acid, also known as folate, is a B vitamin that can be found in a variety of fruits and vegetables. It can also be chemically synthesized. Folate, a watersoluble vitamin, helps the body form red blood cells and aids in the formation of genetic material within every body cell. This product exhibits metal binding properties. Hematopoietic vitamin present, free or combined with one or more additional molecules of L-(+)-glutamic acid, in liver, kidney, mushrooms, spinach, yeast, green leaves, and grasses.
Folic acid (Vitamin B9 and folate) is essential to numerous bodily functions. The human body needs folate to synthesize DNA, repair DNA, and methylate DNA as well as to act as a cofactor in certain biological reactions. It is especially important in aiding rapid cell division and growth, such as in infancy and pregnancy.
Folic acid (FA) and dihydrofolic acid (FAH2) are substrates of dihydrofolate reductase(s) which reduce them to tetrahydrofolate (THF), which in turn supports ‘one carbon’ transfer. Tetrahydrofolates are required for de novo synthesis of purines, thymidylic acid and various amino acids and for post-translational methylation (epigenetics).
Very slightly soluble in cold water (0.0016 mg/mL at 25 °C), soluble to about 1% in boiling water. Slightly soluble in methanol, appreciably less soluble in ethanol and butanol. Insoluble in acetone, chloroform, ether, benzene. Relatively soluble in acetic acid, phenol, pyridine, solutions of alkali hydroxides and carbonates. Soluble in hot dilute HCl and H2SO4.

Supplier: NEW PIG

Prevent slips, trips and falls in high traffic areas with our easy to clean, adhesive backed commercial floor mat.

Supplier: MP Biomedicals

SPINeasy PCR purification and gel extraction Kit is a silica-membrane spin-column kit that enables quick and convenient DNA clean up from various enzymatic reactions, such as PCR and restriction digestion, as well as isolation and purification of DNA fragments from agarose gel electrophoresis.

Supplier: Corning

Axygen power supplies are ideal for most electrophoresis needs.

Supplier: OMEGA BIO-TEK

Isolate plasmid DNA from up to 5 ml culture in 9 minutes utilizing an innovative lysate clearance column.

Supplier: ProSci Inc.

Histone deacetylase (HDAC) and histone acetyltransferase (HAT) are enzymes that regulate transcription by selectively deacetylating or acetylating the eta-amino groups of lysines located near the amino termini of core histone proteins (1). Eight members of HDAC family have been identified in the past several years (2,3). These HDAC family members are divided into two classes, I and II. Class I of the HDAC family comprises four members, HDAC-1, 2, 3, and 8, each of which contains a deacetylase domain exhibiting from 45 to 93% identity in amino acid sequence. Class II of the HDAC family comprises HDAC-4, 5, 6, and 7, the molecular weights of which are all about two-fold larger than those of the class I members, and the deacetylase domains are present within the C-terminal regions, except that HDAC-6 contains two copies of the domain, one within each of the N-terminal and C-terminal regions. Human HDAC-1, 2 and 3 were expressed in various tissues, but the others (HDAC-4, 5, 6, and 7) showed tissue-specific expression patterns (3). These results suggested that each member of the HDAC family exhibits a different, individual substrate specificity and function in vivo. HDAC8 interacts with PEPB2-MYH11, a fusion protein consisting of the 165 N-terminal residues of CBF-beta (PEPB2) with the tail region of MYH11 produced by the inversion Inv(16)(p13q22), a translocation associated with acute myeloid leukemia of M4EO subtype. The PEPB2-MYH1 fusion protein also interacts with RUNX1, a well known transcriptional regulator, suggesting that the interaction with HDAC8 may participate to convert RUNX1 into a constitutive transcriptional repressor.

Supplier: Thermo Fisher Scientific

GeneJET Gel Extraction Kit is designed for rapid and efficient purification of DNA fragments from standard or low-melting point agarose gels run in either TAE or TBE buffer.

Supplier: LAUDA

The compact Variocool circulating chillers are ideal for demanding temperature control tasks in laboratories, mini plants and production. The units have a colour TFT screen and membrane keyboard, a USB interface and an integrated alarm which are easily accessable on the front of the unit. They also feature an electronic fill gauge on the display and low fluid level alarm. Models can be either air or water cooled, all have lockable castors. A wide range of factory fitted options and interfaces which can be retrofitted give the user greater flexibility and control. Options include high power pumps to allow higher supply pressure, heaters adapted to the cooling capacity to enable rapid heating as required, flow control, outdoor installation, use with deionised water and noise reduction. Optional interfaces including analogue module, RS232/485, contact modules, profibus and PT100/LiBus modules are all available to facilitate customisation of the unit to applications. For details of the options and interfaces, please contact your local Avantor sales office.