Refractory Metals, Platinum Group Metals and Ceramics by ...
Platinum group metals are unique among the transition metals because (except for osmium) they combine excellent catalytic activity with low stone reactivity. As a result, the platinum group metals at Ultramet are used primarily for two purposes: protective and catalytic coatings.
ULTRAMET - Advanced Material Solutions for Extreme ...
Engineering, process development, and manufacturing of refractory metals, platinum group metals, and ceramics for extreme environments and high performance. Ultramet fabricates a broad variety of refractory materials in various forms for multiple industries including Aerospace, Medical, Chemical, Semiconductor, Nuclear, and Oil & Gas.
Approaching Platinum-Refractory Recurrent Ovarian Cancer ...
Apr 30, 2018 · Expert Robert L. Coleman, MD, defines platinum-refractory recurrent ovarian cancer in the context of progression and considers if patients are candidates for secondary cytoreductive surgery.
Platinum group - Wikipedia
The platinum-group metals (abbreviated as the PGMs; alternatively, the platinoids, platinides, platidises, platinum group, platinum metals, platinum family or platinum-group elements (PGEs)) are six noble, precious metallic elements clustered together in the periodic table.These elements are all transition metals in the d-block (groups 8, 9, and 10, periods 5 and 6).
Refractory metals - Wikipedia
Refractory metals are a class of metals that are extraordinarily resistant to heat and wear.The expression is mostly used in the context of materials science, metallurgy and engineering.The definition of which elements belong to this group differs. The most common definition includes five elements: two of the fifth period (niobium and molybdenum) and three of the sixth period (tantalum ...
Relevance of platinum sensitivity status in relapsed ...
Background. Extensive stage small cell lung cancer (ES-SCLC) patients who progress following platinum-based chemotherapy are traditionally categorized as platinum-sensitive (progression ≥ 90 days from last platinum dose) or refractory (progression< 90 days), apractice arising from seminal observations of worse survival in refractory patients.
High Temperature Barrier Coatings for Refractory Metals
NASA Contractor Report 195475.... ,• ¸¸•.jr High Temperature Barrier Coatings for Refractory Metals G.A. Malone and T. Walech Electroformed Nickel, Inc. Huntsville, Alabama
Platinum-Sensitive Recurrence in Ovarian Cancer: The Role ...
Sep 24, 2013 · These classifications are based mainly on clinical evidence and useful in the clinical management of ovarian cancer. Among them, the platinum-refractory group is perhaps the easiest to conceptualize because these patients do not respond to platinum-based therapy and show progression during the course of the therapy.
The Refractory Noble Metals and Rhenium | Johnson Matthey ...
The four scarcer platinum group metals— rhodium, ruthenium, iridium and osmium— have higher melting points than platinum and palladium, they are more resistant to acid attack (in massive form they are virtually insoluble in aqua regia) and mechanically they are …
Refractory & Platinum Metals | Plasma Processes
Refractory & Platinum Metals. Plasma Processes offers a broad range of platinum and refractory metal components and coatings with application in medical instrumentation. Metals such as iridium and tantalum exhibit bio-compatible properties. Refractory Metals. Molybdenum Coatings.
REFRACTORY METALS - ASM International
Metals in the group are shown in Table 1. Principal materials in the group are tungsten, tantalum, molybdenum, and niobium, all of which are routinely used in the fur-nace industry. Although its melting point is 1852oC (3365oF), zirconium is also included in the refractory metals group. Other re-fractory metals are rhenium, iridium, hafnium ...
Treatment of platinum refractory or resistant ovarian ...
Sep 01, 2018 · In The Lancet Oncology, Radoslav Chekerov and colleagues1 report the results of a randomised phase 2 trial of the efficacy and safety of adding sorafenib (an oral tyrosine kinase inhibitor of the VEGF receptor and Ras, Raf, MEK, and ERK signalling pathways) to topotecan during chemotherapy and in maintenance in recurrent platinum-resistant or platinum-refractory ovarian cancer.1 The ...
High temperature behaviour of platinum group metals in ...
Metal losses of platinum group metals during high temperature oxidation in air. Fig. 21. Metal losses of platinum group metals and refractory metals during high temper- ature oxidation in oxygen (1.3 X lO^mbar). 335 evaporation of volatile oxides.
Management of Platinum Resistant – Refractory Ovarian ...
Ovarian cancer accounts for 3% of cancer deaths among women and is the most lethal gynecological malignancy. The five year survival for all stages collectively is 45.6% and relapsed ovarian cancer is incurable. Platinum resistance is a major prognostic determinant but the molecular pathways involved in resistance mechanism are unknown.
Therapeutic Strategies for Recurrent Ovarian Cancer
Nov 09, 2019 · Future Oncol. 2012;8(9):1135-1147. Combination chemotherapy in platinum-resistant ovarian cancer eventually fails to improve overall survival but …
platinum refractory | Cancer Survivors Network
In patients with relapsed ovarian cancer, the overall response rates on treatment with topotecan range from 19%-33% in platinum-sensitive patients, 14%-18% in platinum-resistant patients, and 5%-11% in platinum-refractory patients. The proportion of patients achieving stable disease ranges between 17% in refractory and 48% in sensitive patients.
Top 10 Materials with Highest Melting Point in the World ...
Dec 13, 2017 · Osmium is the sixth-period Ⅷ group element in the periodic table. It is one of the platinum group metals, a heavy platinum group metal, and is the densest metal known. Osmium is very stable in air, while osmium in powder form is easily oxidized.
Learn About Refractory Metals - The Balance
Dec 10, 2018 · The term refractory metal is used to describe a group of metal elements with high melting points and are resistant to wear, corrosion, and deformation. ... Learn About Refractory Metals ... a Rare Platinum Group Metal, and Its Applications. Our Best Money Tips, Delivered . Email Address.
Research on Single Crystals of Some Platinum Group Metals ...
The microstructure and some physical and stone properties of the platinum group metals iridium, rhodium, ruthenium and osmium, prepared by electron-beam melting, have been investigated and the results are reviewed in this article. The degree of anisotropy of these properties has been evaluated and high plasticity has been demonstrated for single crystals of the refractory platinum group metals.