Influence of properties of low grade Mn ore on the sintering process and quality of produced Mn sinters

2017 ◽  
Vol 1 (11) ◽  
pp. 8-11
Author(s):  
Zuzana SEMANOV�
Keyword(s):  
Low Grade ◽  
Sintering Process ◽  
Influence Of Properties ◽  
Mn Ore

scholarly journals Effect of TiO2 on the Sintering Behavior of Low-Grade Vanadiferous Titanomagnetite Ore

Materials ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4376
Author(s):  
Songtao Yang ◽  
Weidong Tang ◽  
Xiangxin Xue
Keyword(s):  
Perovskite Phase ◽  
Calcium Ferrite ◽  
Sintering Behavior ◽  
Low Grade ◽  
Sintering Process ◽  
X Ray Diffraction ◽  
Degradation Index ◽  
Tio2 Content ◽  
Iron Ore Fines

Low-grade vanadiferous titanomagnetite ore (LVTM) is as an important mineral resource for sintering ore manufacturing. Furthermore, TiO2 has a significant effect on the sintering process of iron ore fines. The effects of TiO2 on the metallurgical properties, microstructure, and mineral composition of LVTM sinter were investigated by sintering pot tests, X-ray diffraction (XRD), scanning electron microscopy (SEM), and mineral phase microanalysis. The results were as follows: as the TiO2 content increased from 1.75% to 4.55%, the flame front speed and productivity decreased, while the reduction degradation index (RDI) and softening properties deteriorated. In addition, the tumbler index (TI) values reached a maximum at TiO2 = 1.75%. In addition, with increasing TiO2 content, an increase in the magnetite and perovskite phase, and a decrease in calcium ferrite and hematite were found with an increase in TiO2 content. Thus, the lower the TiO2 content, the better the quality of the sinter.

Increasing Competency Of SD Teachers In Thematic Learning Planning Through Group Supervision Using Collaborative Approaches In SDN Tlambah 2 Karangpenang Sampang

2019 ◽  
Vol 4 (2) ◽  
pp. 44-54
Author(s):  
Namin Namin
Keyword(s):  
Action Research ◽  
Action Observation ◽  
Group Supervision ◽  
Low Grade ◽  
Classroom Teachers ◽  
Collaborative Approach ◽  
Research Subjects ◽  
Thematic Learning ◽  
Planning Action

Abstrak: Penelitian ini dilakukan dengan tujuan meningkatkan kompetensi guru di SDN Tlambah 2, Kabupaten Karangpenang Sampang. Perencanaan pembelajaran tematik dalam meningkatkan kualitas pembelajaran tematik. Subjek penelitian dalam penelitian tindakan kelas ini adalah guru kelas di Sekolah Dasar Negeri Tlambah 2, Kabupaten Karangpenang Sampang. Penelitian tindakan kelas ini dilaksanakan dalam dua siklus, menggunakan tahapan perencanaan, tindakan, observasi dan refleksi dalam setiap siklus. Data yang terkumpul dianalisis secara kuantitatif dan kualitatif. Dari penelitian tindakan kelas ini disimpulkan bahwa supervisi kelompok dengan pendekatan kolaboratif dapat meningkatkan kompetensi guru kelas di SDN Tlambah 2 Kabupaten Karangpenang Sampang.   Kata kunci: kolaboratif, kompetensi, tematik     Abstract: This research was conducted with the aim of increasing the competency of teachers in SDN Tlambah 2, Karangpenang Sampang District, Spreading thematic learning planning in improving the quality of thematic learning. Research subjects in this action research are low grade teachers in Tlambah 2 Public Elementary School, Karangpenang Sampang District. School action research means it is carried out in two cycles, using the stages of planning, action, observation and reflection in each cycle. The collected data is analyzed quantitatively and qualitatively. From this school action research concludes that group supervision with a collaborative approach can improve the competence of classroom teachers in SDN Tlambah 2, Karangpenang Sampang District.   Keywords: collaborative, competence, thematic

scholarly journals QOL-36. USE OF CANNABINOIDS IN THE PEDIATRIC CENTRAL NERVOUS SYSTEM TUMOR POPULATION

2020 ◽  
Vol 22 (Supplement_3) ◽  
pp. iii438-iii438
Author(s):  
Kathleen Dorris ◽  
Jessica Channell ◽  
Ashley Mettetal ◽  
Molly Hemenway ◽  
Natalie Briones ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Central Nervous System ◽  
Nervous System ◽  
Cell Activity ◽  
Cns Tumors ◽  
Low Grade ◽  
Tumor Type ◽  
Central Nervous System Tumor ◽  
The Impact

Abstract BACKGROUND Cannabinoids, including cannabidiol (CBD) and tetrahydrocannabinol (THC), are a class of compounds found in marijuana. Numerous studies in adults have examined cannabinoid use in management of cancer-related symptoms such as nausea, anorexia, and pain. Less is known about the use in the pediatric oncology population. METHODS A prospective observational study has been ongoing since 2016 at Children’s Hospital Colorado to evaluate cannabinoids’ impact using PedsQL™ modules on quality of life of pediatric patients with central nervous system (CNS) tumors who are 2–18 years old. Laboratory assessments of T-cell activity and pharmacokinetics of CBD, THC and associated metabolites are in process. Diaries with exploratory information on cannabinoid use patterns are being collected. RESULTS Thirty-three patients (14:19; male:female) have been enrolled with a median age of 6.4 years (range, 2.9–17.7 years). The most common tumor type in enrolled patients is embryonal tumors (13/33; 39%). Nine (27%) patients have low-grade glial/glioneuronal tumors, and eight (24%) had high-grade/diffuse midline gliomas. The remaining patients had ependymoma or craniopharyngioma. The median time on cannabinoids is 9 months. Most (n=20) patients have used oral products with CBD and THC. One patient continues on cannabinoid therapy in follow up. Preliminary immune function analyses identified impaired neutrophil superoxide anion production and chemotaxis in patients taking cannabinoids at early time points on therapy. CONCLUSIONS Families of children with various CNS tumors are pursuing cannabinoid therapy for both antitumor and supportive care purposes. Analysis of the impact of cannabinoids on patients’ quality of life is ongoing.

Synthesis of Low Viscosity Polydimethylsiloxane Using Low Grade of Octamethylcyclotetrasiloxane

2021 ◽  
Vol 1028 ◽  
pp. 365-370
Author(s):  
Diba G Auliya ◽  
Soni Setiadji ◽  
Zulfi Mofa Agasa ◽  
Fitrilawati ◽  
Norman Syakir ◽  
...  
Keyword(s):  
Ring Opening ◽  
Raw Materials ◽  
Vitreoretinal Surgery ◽  
Production Costs ◽  
Low Grade ◽  
High Grade ◽  
High Quality ◽  
Low Viscosity ◽  
Polymerization Method

Polydimethylsiloxane (PDMS) has been widely used as a vitreous humour substitution in vitreoretinal surgery. Due to its limited availability and increasing domestic needs, the price of PDMS in Indonesia became very expensive. Previously, we reported the synthesized of PDMS from a high grade of monomer of 98% of Octamethylcyclotetrasiloxane (D4) and found that all PDMS samples produced high quality samples similar to that of commercial one. However, by considering the ease of obtaining raw materials and also the production costs, the synthesis of PDMS using monomer which easy to be found in Indonesia and low production costs is needed to be developed. Here, we reported the synthesis of PDMS using low grade of 96% of D4 in order to produce high quality of PDMS with low viscosity that can be used for vitreous humous substitution in vitreoretinal surgery. PDMS samples with low viscosity value of 0.94-1.35 Pa.s have been successfully synthesized from low grade of D4 and MM using ring-opening polymerization method. The yields of PDMS resulted in this research were in the range between 67.27% and 76.26%. From FTIR spectroscopy, it is found that all synthesized samples have structure and functional groups similar to PDMS using high grade of monomer of 98% Octamethylcyclotetrasiloxane (D4). From refractometer and surfgauge measurements, all samples have refractive index in the range of 1,4034-1,4040 and the value surface tension was 21 m.N/m.

Mini-review: Childhood-onset Craniopharyngioma

2021 ◽  
Author(s):  
Anna Otte ◽  
Hermann L Müller
Keyword(s):  
Quality Of Life ◽  
Survival Rates ◽  
Residual Tumor ◽  
Tumor Location ◽  
Multidisciplinary Teams ◽  
Low Grade ◽  
Childhood Onset ◽  
Severe Impairment ◽  
Grade Malignancy

Abstract Craniopharyngiomas are rare embryonic malformational tumors of the sellar/parasellar region, classified by the WHO as tumors with low-grade malignancy (WHO I°). The childhood adamantinomatous subtype of craniopharyngioma is usually cystic with calcified areas. At the time of diagnosis, hypothalamic/pituitary deficits, visual disturbances and increased intracranial pressure are major symptoms. The treatment of choice in case of favorable tumor location (without hypothalamic involvement) is complete resection. It is important to ensure that optical and hypothalamic functionality are preserved. In case of unfavorable tumor location, i.e. with hypothalamic involvement, a hypothalamus-sparing surgical strategy with subsequent local irradiation of residual tumor is recommended. In the further course of the disease, recurrences and progression often occur. Nevertheless, overall survival rates are high at 92%. Severe impairment of quality of life and comorbidities such as metabolic syndrome, hypothalamic obesity and neurological consequences can be observed in patients with disease- and/or treatment-related lesions of hypothalamic structures. Childhood-onset craniopharyngioma frequently manifests as a chronic disease so that patients require lifelong, continuous care by experienced multidisciplinary teams to manage clinical and quality of life consequences.For this review, a search for original articles and reviews published between 1986 and 2020 was performed in Pubmed, Science Citation Index Expanded, EMBASE and Scopus. The search terms used were “craniopharyngioma, hypothalamus, pituitary obesity, irradiation, neurosurgery”.

Terminal duct adenocarcinomas of the parotid gland

1995 ◽  
Vol 109 (5) ◽  
pp. 466-468 ◽  
Author(s):  
Bonnie L. Kemp ◽  
John G. Batsakis ◽  
Adel K. El-Naggar ◽  
Sophia N. Kotliar ◽  
Mario A. Luna
Keyword(s):  
Salivary Gland ◽  
Parotid Gland ◽  
Salivary Glands ◽  
Minor Salivary Gland ◽  
Low Grade ◽  
Minor Salivary Glands ◽  
Biological Behaviour ◽  
Parotid Neoplasms ◽  
Clinicopathological Study

AbstractThe major salivary glands are considered to rarely be the sites of primary terminal duct adenocarcinomas, a neoplasm with a considerable predilection for origin from intraoral minor salivary glands. We present a clinicopathological study of 22 terminal duct adenocarcinomas of the parotid gland, the largest single series to date. A comparison between the parotid neoplasms and over 200 minor salivary gland terminal duct adenocarcinomas indicates there is little difference in biological behaviour and confirms the low-grade quality of the carcinomas, regardless of site of origin.

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