simplified the treatment, decreased the operating costs and improved the environmental conditions. Our investigations involved flotation concen-trates of low-sulfide platinum-bearing chrome ores from South Africa. The ore had the compositions shown in the Table. An X-ray microscopy study of the phase composition of the flotation concentrate
A flowsheet has been developed for the production of rich concentrates of precious and non-ferrous metals by a complex treatment of the flotation products from South African platinum-containing chrome ores. The procedure involves: autoclave leaching, roasting, hydrochlorination and precious metal recovery by sorption. Autoclave oxidative leaching of the initial material allows the non-ferrous
14/12/2008· The collecting properties of diisobutyl dithiophosphinate for platinum are determined, and the use of this reagent as an additional collector for platinum-group metals is confirmed in the course of the experimental flotation of platinum-bearing copper-nickel ore samples.
Proceedings of the 4th World Congress on Mechanical, Chemical, and Material Engineering (MCM'18) Madrid, Spain August 16 18, 2018 Paper No. MMME 124 DOI: 10.11159/mmme18.124 MMME 124-1 Characterisation and Flotation of a Weathered Platinum Group Metal
Request PDF on ResearchGate On Aug 1, 2018, Mohale Letseli and others published Characterisation and Flotation of a Weathered Platinum Group Metal Ore
Effect of Alteration on the Mineralogy and Flotation Performance of PPM Platinum Ore . Chapter · January 2012 with 177 Reads How we measure 'reads' A 'read' is counted each time someone views a
Synopsis Kell is a hydrometallurgical treatment option for the recovery of platinum group metals (PGMs), gold, silver, and base metals from flotation concentrates to refined products on site.
Research highlights The effect of different comminution procedures on the flotation of PGM ores was studied. As opposed to BMSs the worst flotation performance with PGMs was observed with dry milling. ToF-SIMS, XPS and MLA were used to study the surface of particles to explain the results.
Background. Chemotherapy with taxanes and platinum compounds has resulted in substantial survival beneﬁ ts both in adjuvant and metastatic settings. However, as a side effect, such chemotherapy may cause peripheral neuropathy (CIPN) which may result in discontinuation of treatment, and if it persists after treatment completion, has a negative
14/11/2017· A retrospective evaluation of activity of gemcitabine/platinum regimens in the treatment of recurrent ovarian cancer. Tran N. Le 1, Rachel E. Harvey 2, Christine K. Kim 3, Jubilee Brown 4, Robert L. Coleman 3 & Judith A. Smith 1,5 Gynecologic Oncology Research and Practice volume 4, Article number: 16 (2017) Cite this article. Article metrics. 3109 Accesses. Abstract. Background.
14/11/2017· A retrospective evaluation of activity of gemcitabine/platinum regimens in the treatment of recurrent ovarian cancer. Tran N. Le 1, Rachel E. Harvey 2, Christine K. Kim 3, Jubilee Brown 4, Robert L. Coleman 3 & Judith A. Smith 1,5 Gynecologic Oncology Research and Practice volume 4, Article number: 16 (2017) Cite this article. Article metrics. 3109 Accesses. Abstract.
The average re-treatment interval of carboplatin-allergic patients was 28.1 months, including 93.3% of patients with platinum re-treatment interval of more than 1 year. The allergic reaction occurred in the 2nd or 3rd course of re-treatment in 26 patients, accounting for 70.3% of all patients with recurrence. Seventeen patients were subjected
The Bushveld Complex of South Africa contains almost 90% of the world’s reserves of platinum group minerals (PGMs). In the flotation of PGMs, there are significant challenges arising from the
Experimental-analytical methods of the investigating the effect of complexing reagents on platinum flotation Article in Journal of Mining Science 44(3):283-288 · May 2008 with 11 Reads
Platinum-based drugs cisplatin, carboplatin and oxaliplatin are widely used in the therapy of human neoplasms. Their clinical success is, however, limited due to severe side effects and intrinsic or acquired resistance to the treatment. Much effort has been put into the development of new platinum anticancer complexes, but none of them has
23/09/2016· Mechano-chemical treatment with feeding a low soluble agent into a mill before flotation of copper-sulfide gold-bearing ore enabled to higher gold recovery into rough and intermediate flotation concentrates by 15.9 and 4% respectively. In this case Au content in tailings was lowered by 0.15 g/t as compared to flotation experiments with butyl
•Platinum Metals Rev., 2013, the value of adding copper sulfate in the treatment of Platreef PGM-bearing ore. Introduction Most of the world’s supply of Pt and Pd and associated elements comes from mines within four major layered igneous intrusions: the Bushveld Complex in South Africa, the Stillwater Complex in the USA, the Great Dyke in Zimbabwe and the Noril’sk-Talnakh Complexes
About 80% of the worlds’ reserves for platinum group metals (PGMs) are in South Africa’s Bushveld Igneous Complex. Processing of PGM involves comminution, flotation, smelting, converting, base metals refinery and precious metals refinery. Due to increasing chrome content in the feed and the challenges associated with operating high chrome feed, alternative routes to smelting of PGM are
1/11/2019· 1. BMC Pulm Med. 2019 Nov 1;19(1):195. doi: 10.1186/s12890-019-0948-x. Treatment beyond four cycles of first line Platinum and Etoposide chemotherapy in real-life patients with stage IV Small Cell Lung Cancer: a retrospective study of the Merseyside and Cheshire Cancer network.
1. Pharmacoeconomics. 2017 Jan;35(1):97-109. doi: 10.1007/s40273-016-0440-x. Olaparib for Maintenance Treatment of BRCA 1 or 2 Mutated, Relapsed, Platinum-Sensitive Ovarian, Fallopian Tube and Peritoneal Cancer in People Whose Relapsed Disease has Responded to Platinum-Based Chemotherapy: An Evidence Review Group Perspective of a NICE Single Technology Appraisal.
22/03/2016· Breast cancer associated (BRCA) genes are critical for DNA repair. Mutations in BRCA1 and BRCA2 (BRCAm) result in loss of these repair mechanisms and potential carcinogenesis. Germline BRCAm are common in ovarian carcinomas, particularly in platinum-sensitive disease. The increased prevalence of BRCAm in platinum-sensitive disease is likely due to enhanced responsiveness to platinum
The targeted delivery of chemotherapeutic drugs is a major challenge in the clinical treatment of cancer. Herein, we constructed a multifunctional DNA nanoplatform as a versatile carrier of the highly potent platinum‐based DNA intercalator, 56MESS. In our rational design, 56MESS was efficiently loaded into the double‐bundle DNA tetrahedron
This meta-analysis was performed to compare the effects and toxicities between irinotecan/platinum (IP) and etoposide/platinum (EP) regimens as the fist-line treatment of patients with extensive-stage small cell lung cancer (E-SCLC). A systematic search was made of MEDLINE, Cochrane, ISI Web of Science and SCOPUS databases. Randomised clinical
Women aged 18–70 years who had platinum-resistant (defined as progression within 6 months after the last platinum treatment) or platinum-refractory (defined as progression during the initial platinum-based treatment) ovarian cancer were eligible to take part in the study. Patients with progression within 6 months of treatment with a non
Research on the flotation behaviour of platinum group minerals (PGM) has mainly focused on the flotation of base metal sulphides because of their association with the PGMs and due to the assumption that the PGMs would respond similarly to such sulphides in their flotation behaviour.
In the flotation of platinum group minerals (PGMs) it has generally been assumed that they will behave similarly to base metal sulfides and thus sulfide reagent regimes are generally used in such flotation plants. However the tellurides and arsenides of platinum and palladium contribute about 50% of the PGMs present in the Platreef ore, located in the northern limb of the Bushveld Complex of
5/12/2007· Read "Surface characteristics and flotation behaviour of platinum and palladium arsenides, International Journal of Mineral Processing" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.
9/07/2015· Platinum–based chemotherapy seems to be the most effective systemic therapy in patients with advanced stage disease. Platinum based gemcitabine was widely used in the late 1990s and 2000s as a part of phase studies in MPM because of the synergy between gemcitabine and platinum compounds [4–11].
Seven patients are still receiving salvage therapy. The median overall survival from the time deemed to be platinum resistant is 23.2 months (95% CI 20.1–26.4). Patients who have been deemed platinum resistant may still benefit from platinum re‐treatment after an interval of treatment
5/12/2007· The surface characteristics and flotation behaviour of synthetic sperrylite (PtAs 2) and palladoarsenide (Pd 2 As) has been investigated. The results revealed that, of the two synthetic sperrylite samples described, the one synthesised at a short initial thermal treatment, floated well in the presence of xanthate whereas the other, synthesised