18334 Results for: "Crime+Scene+and+Evidence+Collection+Accessories"

Supplier: VWR International

This adjustable dispenser features a digital readout, and a positive displacement piston ensures complete recovery of the sample.

Supplier: Stemcell Technologies

Interleukin 21 (IL-21) is a pleiotropic cytokine that is composed of four α-helical bundles and primarily produced by natural killer T (NKT) cells, T follicular helper (Tfh) cells, and Th17 cells (Spolski and Leonard 2008). IL-21 signals via heterodimers of the IL-21 receptor (IL-21R) and the IL2RG-encoded common cytokine receptor γ-chain (Parrish-Novak et al.; Ozaki K et al. 2000), and utilizes the JAK/STAT, MAPK, and PI3K pathways (Spolski and Leonard 2014). IL-21 has been shown to have a critical role in regulating immunoglobulin production and differentiation of the pro-inflammatory Th17 population of cells (Ozaki et al. 2002; Nurieva et al.). Additionally, IL-21 specifically sustains CD8+ T cell effector activity and provides a mechanism of CD4+ T cell help during chronic viral infection (Elsaesser et al.). IL-21 signaling was also found critical for the development of type 1 diabetes in NOD mice (Sutherland et al.) and control of T cell autoimmunity by regulatory B cells (Yoshizaki et al.). This product is animal component-free.

Supplier: Labconco

FreeZone Stoppering Tray Dryers provide precise control and program flexibility for consistent performance and are designed for lyophilizing moderate to large loads and stoppering vials or serum bottles under vacuum. They offer options for a built-in 6-port manifold and isolation valve.

Supplier: Stemcell Technologies

Leukemia inhibitory factor (LIF) is an interleukin 6 class cytokine that regulates a broad variety of developmental functions. After LIF binds to LIF receptor (LIFR), LIFR associates with gp130 and activates JAK/STAT and MAPK signaling (Auernhammer and Melmed; Suman et al.). LIFR activation of STAT3 is essential for maintaining the mouse embryonic stem cell phenotype (Niwa et al.). Produced by the endometrium, LIF plays an important autocrine and paracrine role in implantation by regulating proliferation, invasion, and differentiation of trophoblasts following blastocyst attachment (Auernhammer and Melmed; Suman et al.). Human LIF can be used for the maintenance of mouse embryonic stem cells, however mouse LIF cannot bind to the human receptor, thus rendering mouse LIF inactive (Dahéron et al.). LIF is produced by CD4+ and activated regulatory T cells, and promotes Foxp3 expression, while repressing Th17 lineage-specific genes (Metcalfe). LIF is also secreted by mesenchymal stromal cells, where it supports hematopoiesis and immune modulation (Nasef et al.).

Supplier: GILSON, INC.

PIPETMAN®, recognized as the pipetting standard for its reliability and proven durability, is a fully adjustable, air-displacement pipette that uses disposable tips. PIPETMAN combines legendary accuracy, precision, and durability with easy pipetting and handling. PIPETMAN pipettes come in a large range of volumes with reduced pipetting forces for hours of comfortable pipetting.

Supplier: Ohaus

The Enviro-Genie® Benchtop Refrigerator Incubator features five capabilities in one unit: refrigeration, incubation, rotation, rocking, stirring.

Supplier: HETTICH INSTRUMENTS

Hettich Lab Technology's ROTOFIX 32 A is a rugged, general-purpose benchtop centrifuge ideal for routine clinical, research, or industrial applications.

Supplier: Bioss

REEP5 is a 189 amino acid multi-pass membrane protein. Thought to promote the functional cell surface expression of olfactory receptors, REEP5 belongs to the DP1 family and is encoded by a gene that maps to chromosome 5. With 181 million base pairs encoding around 1,000 genes, chromosome 5 is about 6% of human genomic DNA. Chromosome 5 is associated with Cockayne syndrome through the ERCC8 gene and familial adenomatous polyposis through the adenomatous polyposis coli (APC) tumor suppressor gene. Treacher Collins syndrome is also chromosome 5 associated and is caused by insertions or deletions within the TCOF1 gene. Deletion of the p arm of chromosome 5 leads to Cri du chat syndrome. Deletion of 5q or chromosome 5 altogether is common in therapy-related acute myelogenous leukemias and myelodysplastic syndrome.

Supplier: YSI

The ProSolo handheld represents the evolution of YSI's line of portable Dissolved Oxygen field meters. It replaces the ProODO as YSI's most advanced optical dissolved oxygen field meter and is ideal for a diverse range of applications that include aquaculture, coastal, estuary, wastewater, and wetland sampling.

Supplier: Metro

The Top-Track™ system maximizes the usable storage area in a given space.

Supplier: Stemcell Technologies

The platelet-derived growth factor (PDGF) family has five heparin-binding members that assemble into four homodimers (PDGF-AA, PDGF-BB, PDGF-CC, and PDGF-DD) and one heterodimer (PDGF-AB; Fretto et al.; Li and Eriksson). PDGF signals through the receptor tyrosine kinases PDGFRα and PDGFRβ. It has been shown that PDGF-induced migration involves signaling pathways involving MEK/ERK, EGFR, Src, and PI3K/AKT (Kim et al.). PDGF is a potent mitogen for cells of mesenchymal origin, such as fibroblasts, glial cells, and vascular smooth muscle cells. PDGF has been implicated in pathogenesis of atherosclerosis, glomerulonephritis, cancer, and in the contraction of vascular smooth muscle cells of rat aortic tissues (Fretto et al.; Sachinidis et al.). PDGF-DD promotes growth and survival of renal artery smooth muscle cells and lens epithelial cells, and can act as a macrophage chemoattractant (Changsirikulchai et al.; Lokker et al.; Ray et al.; Uutela et al.).

Supplier: Stemcell Technologies

A member of the apolipoprotein family, Apolipoprotein A-I (apo A-I) is a major glycoprotein component of high density lipoprotein (HDL) particles (Frank and Marcel) which facilitate the reverse transport of cholesterol from peripheral tissues to the liver. Apo A-I binds to the scavenger receptor SR-A1, allowing HDL particles to interact with cells in peripheral tissues (Neyen et al.), and is involved in the esterification of cholesterol, acting as a cofactor for lecithin cholesterol acyltransferase (LCAT; Frohlich). Apo A-I has been shown to bind to the scavenger receptor SR-B1 (Williams et al.) and the beta chain of ATP synthase (Martinez et al.) on hepatocytes, highlighting its importance in HDL endocytosis. Mutations in the APOA1 encoding gene may result in dysregulated HDL levels, leading to an increased risk of amyloidosis and ischemic heart disease (Haase et al.; Obici et al.). This protein product contains a His-residue tag at the amino end of the polypeptide chain. This protein product contains a His-residue tag at the amino end of the polypeptide chain. For consistency and reproducibility across your applications, sclerostin from STEMCELL comes lyophilized with ≥ 92% purity.

Supplier: Stemcell Technologies

Apolipoprotein H (apo H) has been shown to promote the coagulation of blood platelets by inhibiting thrombomodulin complex and inactivating protein C (Keeling et al.), but can also act as an anticoagulant by binding thrombin and inhibiting its procoagulant effects (Pozzi et al.). Belonging to the lipid-binding apolipoprotein family, within the lipocalin superfamily, apo H is a protein constituent of plasma, with a high affinity for negatively charged phospholipids. The structure of apo H reveals four N-terminal complement control protein (CCP) modules, also known as 'sushi' domains, and a distinct fifth C-terminal domain with four antiparallel beta sheets, two alpha-helices, and an extended loop (Schwarzenbacher et al.). Apo H is the main antigen implicated in antiphospholipid syndrome (APS), an autoimmune condition involving pregnancy complications and vascular thrombosis (Brusch). Studies have also reported that Apo H is involved in the progression of atherosclerosis (Harats and George). This protein contains a His-residue tag at the carboxyl end of the polypeptide chain. For consistency and reproducibility across your applications, apolipoprotein H from STEMCELL comes lyophilized with ≥93% purity, and is verified by LAL analysis to ensure endotoxin levels are ≤1.0 EU/μg protein.

Supplier: Stemcell Technologies

Enhanced green fluorescent protein (eGFP)-tagged Cas9 nuclease for the generation of double-strand breaks in CRISPR-Cas9 genome editing.

Supplier: Corning

Rocker cell culture bags are designed for use with commercial rocking motion bioreactor chambers, and feature irradiated ethylene vinyl acetate (EVA)/low-density polyethylene (ULDPE) 9101 film and stability bars on each side. These sterile, single-use cell culture bags are ideal for applications from basic research to large-scale biopharmaceutical manufacturing.

Supplier: CHEMetrics

The ammonia test kits employing the well-established Nessler reagent to determine ammonia concentrations are applicable to drinking water, clean surface water, and good-quality nitrified wastewater effluent.

Supplier: BONE CLONES HOLDINGS

1.7 MYA. The Dmanisi site in the country of Georgia has yielded incredible hominin fossil finds of the species Homo erectus, adding further documentation to the presence of Homo existing outside of Africa around 1.7 million years ago during the Plio-Pleistocene period.

Supplier: BTNX INC.

The Rapid Response™ Fentanyl (FYL) forensic test kit is a lateral flow chromatographic immunoassay for the qualitative detection of fentanyl in liquid and powder substances at the cut-off concentration of 200 ng/ml.

Supplier: Stemcell Technologies

Fibroblast growth factor 8B (FGF-8B) is a member of the fibroblast growth factor (FGF) family and is an isoform of FGF-8. Cytokines in the FGF family possess broad mitogenic and cell survival activities (Folkman andamp; Klagsbrun; Kimelman andamp; Kirschner) and are involved in a variety of biological processes, including cell proliferation, differentiation, survival, and apoptosis (Folkman andamp; Klagsbrun; Klagsbrun; Rifkin andamp; Moscatelli). FGF-8B signals through FGF receptors (FGFRs) to activate PI3K and MAPK pathways. FGF-8B is broadly associated with mitogenic and cell survival activities, and regulates gastrulation, epithelial-mesenchymal transition, and later on mesenchymal to epithelial differentiation during embryonic development. FGF-8B has also been found in peripheral blood leukocytes and healthy bone marrow samples (Mattila andamp; Härkönen). FGF-8B has mitogenic effects on somatic cells in the germinal epithelium and is expressed in adult mouse ovarian cells and tissues, which suggests that it regulates maturation of oocytes and seminiferous epithelium in testis (Valve et al.).

Supplier: Stemcell Technologies

Tumor necrosis factor-alpha (TNF-α) is a pro-inflammatory cytokine that activates NF-κB, MAPK, and PI3K/AKT pathways. Activated T cells and macrophages are the primary producers of TNF-α in response to inflammation and infectious conditions. Many other cell types have been shown to produce TNF-α, among them B cells, NK cells, mast cells, neutrophils, dendritic cells, microglia, endothelial cells, smooth muscle cells, cardiomyocytes, and fibroblasts. TNF-α has cytotoxic effects on cancerous cells by stimulating anti-tumor immunosuppressive responses. TNF-α stimulates expression of E- and P-selectins, thus facilitating adhesion of neutrophils, monocytes, and memory T cells to activated platelets and endothelial cells (Zelová and Hošek). Other effects of TNF-α include vasodilatation and edema formation. in vitro studies of adult rat neural progenitor cells (NPCs) demonstrate that TNF-α reduces neurogenesis in dentate gyrus-derived NPCs, and promotes astrogliogenesis in subventricular zone-derived NPCs (Borsini et al.).

Supplier: Stemcell Technologies

Granulocyte-macrophage colony-stimulating factor (GM-CSF) promotes the proliferation and differentiation of hematopoietic progenitor cells and the generation of neutrophils, eosinophils, and macrophages. In synergy with other cytokines such as stem cell factor, IL-3, erythropoietin, and thrombopoietin, it also stimulates erythroid and megakaryocyte progenitor cells (Barreda et al.). GM-CSF was first purified from the culture of mouse lung tissue after lipopolysaccharide treatment. GM-CSF is produced by multiple cell types, including stromal cells, Paneth cells, macrophages, dendritic cells (DCs), endothelial cells, smooth muscle cells, fibroblasts, chondrocytes, and Th1 and Th17 cells (Francisco-Cruz et al.). The receptor for GM-CSF (GM-CSFR) is composed of two subunits: the cytokine-specific α subunit (GMRα; CD116) and the common subunit βc (CD131) shared with IL-3 and IL-5 receptors (Broughton et al.). GM-CSFR is expressed on hematopoietic cells, including progenitor cells and immune cells, as well as non-hematopoietic cells. GM-CSF is able to stimulate the development of DCs that ingest, process, and present antigens to the immune system (Francisco-Cruz et al.).

Supplier: Stemcell Technologies

Interferon-gamma (IFN-γ), also known as type II interferon, is produced by T and NK cells, and in smaller amounts by dendritic cells and macrophages. IFN-γ is controlled by cytokines such as IL-12 and IL-18 secreted in response to infection (Schroder et al.). IFN-γ binds to a receptor complex and initiates signal transduction via the JAK/STAT pathway; this culminates in the transcription and activation of many genes that control a diverse array of immunological functions (De Weerd and Nguyen; Krause et al.). IFN-γ stimulates the antimicrobial and anti-tumor activity of macrophages, NK cells, and neutrophils (Billiau and Matthys) by promoting the activation of microbial effector functions such as production of reactive oxygen species, NO intermediates, complement, etc. (Schroder et al.). IFN-γ enhances MHC class I and II expression in dendritic cells and mononuclear phagocytes, as well as the production of IL-12 by dendritic cells. In B cells, IFN-γ stimulates survival and growth in both mouse and human cells, and redirects B cells from proliferation towards differentiation. IFN-γ favors the development of Th1 vs Th2 cells and stimulates monocyte differentiation and function (Schroder et al.).

Supplier: Stemcell Technologies

Interleukin 17A (IL-17A) is the founding member of the family of cytokines that includes IL-17B through IL-17F. It is a potent pro-inflammatory cytokine that plays a key role in defense against pathogens. IL-17A and IL-17F signal as homodimers or heterodimers through the same receptor, and activate NF-κB, MAPK, and C/EBP pathways (Gaffen). IL-17A is produced by Th17 cells, CD8+ T cells, γ/δ T cells, natural killer (NK) T cells, B cells, innate lymphoid cells, and mesenchymal stromal cells (MSCs) (Cua and Tato; Gaffen; Mojsilović et al.). IL-17A mediates protection against extracellular pathogens, and together with IL-22 stimulates production of antimicrobial peptides. It induces granulopoiesis factors and neutrophil-specific chemokines. Together with tumor necrosis factor alpha (TNF-α), IL-17A induces a sustained neutrophil recruitment during inflammation (Cua and Tato). IL-17A receptor is expressed at particularly high levels on stromal cells, including MSCs. IL-17A increases the frequency and the average size of fibroblast colony-forming units (CFU-F), as well as the proliferation of marrow-derived MSCs. It enhances osteogenic differentiation, and inhibits adipocyte differentiation and chondrogenesis (Mojsilović et al.).

Supplier: Stemcell Technologies

Use angiopoietin-like protein 2 (ANGPTL2) to regulate tissue remodeling through integrin α5β signaling and activation of p38 mitogen-activated protein kinases (MAPK) (Odagiri et al.; Tabata et al.). Highly expressed in the heart, small intestine, and stomach, ANGPTL2 is a glycosylated secretory protein that contains a coiled domain and a fibrinogen-like domain (Kim et al.). Studies have shown that the coiled-coil domain of ANGPTL2 functions as a growth factor, enhancing the survival of hematopoietic stem cells (HSCs) ex vivo (Broxmeyer et al.). ANGPTL2 is also known to play a role in obesity and metabolic diseases, promoting local inflammation in adipose tissue and systemic insulin resistance in mice models (Tabata et al.). By activating an inflammatory cascade in endothelial cells and increasing macrophage infiltration, ANGPTL2 accelerates vascular inflammation which may lead to endothelial dysfunction and atherosclerosis progression (Horio et al.). This protein product contains a His-residue tag at the amino end of the polypeptide chain. For consistency and reproducibility across your applications, sclerostin from STEMCELL comes lyophilized with ≥92% purity, and endotoxin levels are verified to be ≤1.0 EU/μg protein.

Supplier: Air Science

Purair® PCR laminar flow cabinets employ the Air Science® Multiplex™ HEPA filtration technology to create a safe, energy-efficient contaminant-free environment. These PCR workstations are ideally suited for use with non-hazardous contaminants and when flexible access to the instrumentation in the cabinet is required.

Supplier: ELGA LabWater

When Type II water is all you need, then PURELAB Chorus 2 (RO/DI) is the reliable solution with the flexibility to suit your requirements.

Supplier: Hardy Diagnostics

The Dilugent Shaker uses orbital rotation to ensure each dilution is thoroughly vortexed. It is activated by either a hands-free optical sensor or the optional foot pedal. The 42 LED indicators light each cup, letting users easily see what dilution well they are working in.

Supplier: BONE CLONES HOLDINGS

1.8 MYA. The Homo habilis Skull OH 24 (KNM) was discovered by P. Nzube in 1968 and first described by M. Leakey, Clark, & L. Leakey in Nature in 1971.

Supplier: StemBioSys

CELLvo™ XF Matrix is a ready-to-use cell culture substrate which provides a xeno-free native microenvironment that replicates the 3-dimensional "home" in which stem cells naturally reside and proliferate.

Supplier: Labconco

Evaporation systems use nitrogen blow down, vortex motion, and heat to speed up evaporation of up to 48 small samples or eight 450 ml samples at once