145123 Results for: "(\u00B1)-Tetrahydrofurfuryl+bromide&pageNo=10&view=easy"

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: 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: 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: 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: 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: 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: 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: Thermo Fisher Scientific

Pierce™ Boronic acid resin enables ribonucleotide and oligonucleotide RNA isolation.

Supplier: ProSci Inc.

IL-1 receptor-associated kinases (IRAKs) are important mediators in the signal transduction of Toll/IL-1 receptor (TIR) family members. The cytoplasmic domains of TIR proteins interact with the adapter protein, MyD88. MyD88 then recruits IRAKs (IRAK-1, -2, and M), which in turn interact with other adapter molecules, such as TRAF6 to activate NF-κB and MAPK pathways. Recently, a new member of this family, IRAK-4 has been identified. IRAK-4 may act as an upstream activator of IRAK-1. IRAK-4 is important for LPS activation of TLRS. Mice lacking IRAK-4 are resistant to lethal doses of LPS and are also severely impaired in their responses to viral and bacterial challenges (4, 5). IRAK4, an IRAK type protein kinase, is a signal transducer for the immune response Toll-like receptor and interleukin-1 (IL-1) receptor signaling cascades. IRAK4 has auto- and cross-phosphorylation kinase activity and has been shown to phosphorylate and activate IRAK1. Additionally, IRAK4 interacts with IRAK1 and TRAF6 in an IL-1-dependent manner, and overexpression of IRAK4 can activate NF-kappaB as well as mitogen-activated protein (MAP) kinase pathways. IRAK4 (-/-) mice are resistant to a lethal dose of lipopolysaccharide and are severely impaired in their responses to viral and bacterial challenges. At least two mRNA transcripts have been reported: 3.0- and 4.4-kb. IRAK4, also referrred to as NY-REN-64, was first identified as an anitgen in a screen of renal tumors.

Supplier: MP Biomedicals

Poly-lysine is a polycation which binds to DNA, red cell membrane and any negatively charged protein. When adsorbed to the culture surface, poly-lysine increases the number of positively charged sites available for cell binding. A compromise between the easier to use lower molecular weight products and the extremely viscous higher molecular weights would be the products in the range of 70,000-150,000.
It is typically used as a coating substrate for culture dishes, slides, etc. It enhances electrostatic interaction between negatively charged ions of the cell membrane and the culture surface. Both the D- and L- form of the poly-lysine can be used as a coating substrate since poly-lysine is a nonspecific attachment factor for cells; however, certain cells can digest poly-lysine. In this case, poly-D-lysine should be used as the attachment factor so that the cells are not disrupted by excessive uptake of L-lysine.
Other uses for poly-lysine have been reported as well:
• Conjugation to methotrexate for increased drug transport.
• Microencapsulation of islets.
• Use in simple reproducible procedure for chromosomal preparations from a variety of tissues.
• Immobilation of living cells in biocompatible semipermeable microcapsules.
• In the preparation of polycationic beads.
• Conjugation to albumin and horseradish peroxidase to enhance cellular uptake.
Poly-D-lysine hydrobromide is a synthetic amino acid that enhances cell adhesion to solid substrates. It has additionally been shown to eliminate prion proteins from infected cells.

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: 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: MP Biomedicals

SPINeasy DNA Kit for plant is a silica-membrane spin-column kit that enables quick, convenient and cost-effective isolation of genomic DNA (gDNA) from various plant tissues, such as leaf, stem and seed.

Supplier: Honeywell Chemicals

HYDRANAL™-Composite is a frequently used pyridine-free Karl Fischer reagent. This one-component reagent has been proving its capabilities in volumetric titration for more than thirty five years in a large range of applications in the most diverse fields of research and industry.

The one component system have the following advantages:

Supplier: MP Biomedicals

SPINeasy Plasmid Miniprep kit is a silica-membrane spin-column kit that enables up to 20 µg of plasmid DNA to be purified from 1 to 5 ml of transformed bacterial culture.

Supplier: ProSci Inc.

Interleukin-2 (IL-2) is a 133 amino acid glycoprotein with one intramolecular disulphide bond and variable glycosylation. It is secreted by activated T cells and induces proliferation and maturation of activated T cells, natural killer cells and lymphokine activated killer cells. IL-2 also stimulates proliferation of antibody-producing B cells, activates neutrophils and induces mononuclear cells to secrete IFN-gamma and TNF-alpha and -beta. Moreover, studies have shown that IL-2 is required for activation-induced apoptosis, an important homeostatic mechanism in the immune system, which is involved in the maintenance of peripheral tolerance to self-antigens. IL-2 promotes T cell proliferation and particularly naive T cells. IL-2 signalling on activated T cells is effected through a quaternary high-affinity receptor complex consisting of IL-2, IL-2Ralpha (CD25), IL-2Rbeta and IL-2Rgamma. Naive T cells are relatively insensitive to IL-2 as they only express small amounts of IL-2Rbeta and IL-2Rgamma. They only acquire sensitivity after CD25 expression, which captures the cytokine and presents it to the IL-2Rbeta and IL-2Rgamma receptors. IL-2 Superkine (Fc) is an artificial variant of IL-2 containing mutations at positions L80F / R81D / L85V / I 86V / I92F. These mutations are located in the molecule's core that acts to stabilize the structure and to give it a receptor-binding conformation mimicking native IL-2 bound to CD25. These mutations effectively eliminate the functional requirement of IL-2 for CD25 expression and elicit proliferation of T cells. Compared to IL-2, the IL-2 superkine induces superior expansion of cytotoxic T cells, leading to improved antitumor responses in vivo, and elicits proportionally less toxicity by lowering the expansion of Tregulatory cells and reducing pulmonary oedema.

Supplier: ProSci Inc.

Twenty human keratins are resolved with two-dimensional gel electrophoresis into acidic (pI 6.0) subfamilies. This antibody detects acidic (Type I or LMW) and basic (Type II or HMW) cytokeratins: 67 kDa (CK1); 64 kDa (CK3); 59 kDa (CK4); 58 kDa (CK5); 56 kDa (CK6); 52 kDa (CK8); 56.5 kDa (CK10); 50 kDa (CK14); 50 kDa (CK15); 48 kDa (CK16); 40 kDa (CK19). Many studies have shown the usefulness of keratins as markers in cancer research and tumor diagnosis. It is a broad spectrum anti pan-cytokeratin antibody, which differentiates epithelial tumors from non-epithelial tumors e.g. squamous vs. adenocarcinoma of the lung, liver carcinoma, breast cancer, and esophageal cancer. It may be useful to characterize the source of various neoplasms and to study the distribution of cytokeratin containing cells in epithelia during normal development and during the development of epithelial neoplasms. This antibody stains cytokeratins present in normal and abnormal human tissues and has high sensitivity in the recognition of epithelial cells and carcinomas.

Supplier: MP Biomedicals

The GeneClean® II Kit is designed to optimally purify 200 bp to 20 kb DNA from TAE and TBE buffered agarose gels and solutions. The purified DNA is suitable for a variety of downstream applications, such as sequencing, PCR, restriction digestion, cloning and labeling.

Supplier: ProSci Inc.

Guanine nucleotide-binding protein (G protein) alpha subunit playing a prominent role in bitter and sweet taste transduction as well as in umami (monosodium glutamate, monopotassium glutamate, and inosine monophosphate) taste transduction. Transduction by this alpha subunit involves coupling of specific cell-surface receptors with a cGMP-phosphodiesterase; Activation of phosphodiesterase lowers intracellular levels of cAMP and cGMP which may open a cyclic nucleotide-suppressible cation channel leading to influx of calcium, ultimately leading to release of neurotransmitter. Indeed, denatonium and strychnine induce transient reduction in cAMP and cGMP in taste tissue, whereas this decrease is inhibited by GNAT3 antibody. Gustducin heterotrimer transduces response to bitter and sweet compounds via regulation of phosphodiesterase for alpha subunit, as well as via activation of phospholipase C for beta and gamma subunits, with ultimate increase inositol trisphosphate and increase of intracellular Calcium. GNAT3 can functionally couple to taste receptors to transmit intracellular signal: receptor heterodimer TAS1R2/TAS1R3 senses sweetness and TAS1R1/TAS1R3 transduces umami taste, whereas the T2R family GPCRs act as bitter sensors. Functions also as lumenal sugar sensors in the gut to control the expression of the Na+-glucose transporter SGLT1 in response to dietaty sugar, as well as the secretion of Glucagon-like peptide-1, GLP-1 and glucose-dependent insulinotropic polypeptide, GIP. Thus, may modulate the gut capacity to absorb sugars, with implications in malabsorption syndromes and diet-related disorders including diabetes and obesity.

Supplier: THERMO LABSYSTEMS LIFE SCIENCE

Varioskan™ LUX comes equipped with a range of measurement technologies including absorbance, fluorescence intensity and FRET as standard, and with optional luminescence, AlphaScreen and time-resolved fluorescence (TRF) modules. The instrument selects the measurement wavelength using filters or monochromators, depending on which is optimal for each measurement technology.

Supplier: Cytiva

Sephadex™ G-100 DNA Grade is ideal for use in preparing spin columns for DNA purification.

Supplier: G-Biosciences

GET™ CLEAN DNA uses high binding affinity GET™ spin columns to remove salts, enzymes, unincorporated nucleotides, radiolabels, and primer-dimers from any DNA preparation of 100 bp to 20 kb. GET™ spin columns has an enhanced binding affinity for DNA, thus eliminating loss or damage of DNA.

Supplier: Testo

The testo 872s thermal imager is ideally suited for professional industrial and building thermography at the same time it ensures your work is both quick and easy. It is versatile to use, for example in industrial and mechanical maintenance or for detecting structural defects. 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 thermal image scale. This gives the best possible support for your work in professional industrial and building thermography. Take thermal images quickly, reliably and smartly with the highest image quality, very good thermal sensitivity and innovative functions. The case supplied with the thermal imager means it can be conveniently transported

Supplier: NEW PIG

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