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optima
Catalog Number:
(10434-654)
Supplier:
Bioss
Description:
Phosphatase enzymes catalyse hydrolysis of phosphoric acid esters of various alcohols, e.g. a hexose phosphate, to yield the alcohol and free inorganic phosphate. This may be a way of recycling phosphate in the cell, and the level of phosphate may be elevated under conditions of phosphate starvation (in algae for example). Acid phosphatases have pH optima below 7, whereas alkaline phosphatases are most active above pH 7. Commercial quantities of acid phosphatase are obtained from plant sources e.g. potato and wheat germ, whereas similar quantities of alkaline phosphatase are obtained from animal intestine and bacteria.
Catalog Number:
(63042-418)
Supplier:
Excelta
Description:
These are designed to form a consistent stand off and cut the lead to length on most popular radial lead components.
Supplier:
GRANT USA INC.
Description:
The Optima™ range of advanced thermostats can be combined with plastic baths (5L, 12L, 18L), premium stainless steel baths (5L, 12L, 18L, 26L, 38L) or refrigeration units (3 units available)
Catalog Number:
(10434-652)
Supplier:
Bioss
Description:
Phosphatase enzymes catalyse hydrolysis of phosphoric acid esters of various alcohols, e.g. a hexose phosphate, to yield the alcohol and free inorganic phosphate. This may be a way of recycling phosphate in the cell, and the level of phosphate may be elevated under conditions of phosphate starvation (in algae for example). Acid phosphatases have pH optima below 7, whereas alkaline phosphatases are most active above pH 7. Commercial quantities of acid phosphatase are obtained from plant sources e.g. potato and wheat germ, whereas similar quantities of alkaline phosphatase are obtained from animal intestine and bacteria.
Catalog Number:
(10138-112)
Supplier:
PERKINELMER U.S. LLC
Description:
Low-flow GemCone nebulizers permit lower nebulizer gas flow rates, useful for spectral lines with high excitation energies providing a more robust plasma.
Catalog Number:
(10139-146)
Supplier:
PERKINELMER U.S. LLC
Description:
This concentric SeaSpray™ Quartz Nebulizer is designed for use with PerkinElmer ELAN® 5000/6x00/9000/DRCs and NexION® 300/350/1000/2000 ICP-MS series of ICP-MS instruments. It offers freedom from clogging while nebulizing solutions near the limit of solubility of most mineral salts and conferring significant sensitivity gains.
Catalog Number:
(10434-464)
Supplier:
Bioss
Description:
Phosphatase enzymes catalyse hydrolysis of phosphoric acid esters of various alcohols, e.g. a hexose phosphate, to yield the alcohol and free inorganic phosphate. This may be a way of recycling phosphate in the cell, and the level of phosphate may be elevated under conditions of phosphate starvation (in algae for example). Acid phosphatases have pH optima below 7, whereas alkaline phosphatases are most active above pH 7. Commercial quantities of acid phosphatase are obtained from plant sources e.g. potato and wheat germ, whereas similar quantities of alkaline phosphatase are obtained from animal intestine and bacteria.
Supplier:
Air-Tite
Description:
Fortuna Optima syringes are specialty syringes made from very fine borosilicate glass.
Catalog Number:
(200062-418)
Supplier:
Enzo Life Sciences
Description:
Cleavage of heme b (Fe-protoporphyrin IX) at the a-methene carbon bridge to form the open tetrapyrrole, biliverdin IXa and carbon monoxide (CO) is catalyzed by heme oxygenase (HO) isozymes HO-1 and HO-2 (heme hydrogen-donor: oxygen oxidoreductase; EC 1.14.99.3). In mammalian species, biliverdin reductase (BVR; bilirubin: NAD(P)+ oxidoreductase; EC 1.3.1.24) converts the open tetrapyrrole to bilirubin. This pathway represents the only efficient way of making bilirubin and thereby deterring activation of oxygen by the heme molecule. HO-1 belongs to the heat shock protein family (Hsp32), while HO-2 takes a constitutive form expressed at exceedingly high levels in the brain and testes. The end products of the heme degradation process carry out important physiological activities. CO may act as a messenger in the brain and systemic organs stimulating cGMP-production through interactions with the heme-dependent form of guanylate cyclase. Bile pigments display potent antioxidant activity as well as effective antiviral activity against HIV and herpes virus. BVR is unique among all enzymes characterized to date in having two pH optima (6.8 and 8.7), using a different cofactor at each pH range (NADH at pH 7.0 and NADPH at pH 8.7). The enzyme displays pI and molecular mass microheterogeneity, apparently a result of post translational modifications. In rat, the enzyme also shows a tissue specific developmental pattern. BVR is not inactivated by heat shock, and its preexisting message is not sequestered from translation subsequent to thermal stress. Furthermore, reductase preserves microheterogeneity under thermal stress. BVR expression occurs not only in cells and brain regions that already display HO-1 and HO-2, but also in regions and cell types with potential to induce stress proteins. Rat cDNA for BVR has been isolated and characterized. The deduced protein contains 3 cysteine residues (Cys73, Cys281, and Cys290) involved in cofactor and substrate binding. Human BVR consists of a substantially longer polypeptide than the rat enzyme (41-42 kDa vs. 33 kDa), but also is dual cofactor and dual pH dependent, requires free SH groups for activity, and displays pI and molecular mass microheterogeneity. The human and rat BVR share some antigenic epitopes and show immunochemical cross reactivity.
Supplier:
BioSys
Description:
Test strips for urinalysis testing of various parameters
Catalog Number:
(10136-316)
Supplier:
PERKINELMER U.S. LLC
Description:
ORGANICS SPARES KIT - OPTIMA OPTIMA 430
Catalog Number:
(10136-404)
Supplier:
PERKINELMER U.S. LLC
Description:
ELBOW ADAPT, PFA, FOR OPTIMA 2000/400 X
Catalog Number:
(77695-326)
Supplier:
LGC STANDARDS
Description:
TORCH BODY OPTIMA 2000/4000/5000/7000DV
Catalog Number:
(77695-327)
Supplier:
LGC STANDARDS
Description:
TORCH BODY OPTIMA 4300V/5300V/7300V WEAR
Catalog Number:
(10136-300)
Supplier:
PERKINELMER U.S. LLC
Description:
QRTZ BONNET FOR OPTIMA 3X00 SERIES RA H
Catalog Number:
(MSPP-A461-4)
Supplier:
PANTEK TECHNOLOGIES MS
Description:
ISOPROPANOL OPTIMA LC/MS GRAD BOTTLE C4L
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Stock for this item is limited, but may be available in a warehouse close to you. Please make sure that you are logged in to the site so that available stock can be displayed. If the
 is still displayed and you need assistance, please call us at 1-800-932-5000.
Stock for this item is limited, but may be available in a warehouse close to you. Please make sure that you are logged in to the site so that available stock can be displayed. If the
is still displayed and you need assistance, please call us at 1-800-932-5000.
This product is marked as restricted and can only be purchased by approved Shipping Accounts. If you need further assistance, email VWR Regulatory Department at Regulatory_Affairs@vwr.com
-Additional Documentation May be needed to purchase this item. A VWR representative will contact you if needed.
This product has been blocked by your organization. Please contact your purchasing department for more information.
The original product is no longer available. The replacement shown is available.
This product is no longer available. Alternatives may be available by searching with the VWR Catalog Number listed above. If you need further assistance, please call VWR Customer Service at 1-800-932-5000.
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