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Institution

Adma

About: Adma is a based out in . It is known for research contribution in the topics: Carbonate & Permeability (earth sciences). The organization has 684 authors who have published 368 publications receiving 2635 citations.


Papers
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Journal ArticleDOI
TL;DR: Hierarchical nanostructured Ti185 serves as an excellent candidate for replacing costlier titanium alloys and other structural alloys for cost-effective lightweighting applications.
Abstract: Lightweighting of automobiles by use of novel low-cost, high strength-to-weight ratio structural materials can reduce the consumption of fossil fuels and in turn CO2 emission. Working towards this goal we achieved high strength in a low cost β-titanium alloy, Ti-1Al-8V-5Fe (Ti185), by hierarchical nanostructure consisting of homogenous distribution of micron-scale and nanoscale α-phase precipitates within the β-phase matrix. The sequence of phase transformation leading to this hierarchical nanostructure is explored using electron microscopy and atom probe tomography. Our results suggest that the high number density of nanoscale α-phase precipitates in the β-phase matrix is due to ω assisted nucleation of α resulting in high tensile strength, greater than any current commercial titanium alloy. Thus hierarchical nanostructured Ti185 serves as an excellent candidate for replacing costlier titanium alloys and other structural alloys for cost-effective lightweighting applications.

198 citations

Journal ArticleDOI
01 Nov 2004-JOM
TL;DR: In this article, the current status of titanium powder metallurgy is reviewed, which offers near-net shape cost-effective approaches to the fabrication of component components, but they are expensive.
Abstract: Titanium alloys exhibit attractive mechanical properties but they are expensive. This paper reviews the current status of titanium powder metallurgy which offers near-net shape cost-effective approaches to the fabrication of components.

140 citations

Journal ArticleDOI
23 Jan 2015-PLOS ONE
TL;DR: Anxiety, depression and PTSD symptoms were higher in family members than in the patients, and age and symptoms of anxiety and depression during ICU were the major determinants for PTSD at 30-days.
Abstract: Introduction Patients and family members undergo different experiences of suffering from emotional disorders during ICU stay and after ICU discharge. The purpose of this study was to compare the incidence of anxiety, depression and post-traumatic stress disorder (PTSD) symptoms in pairs (patient and respective family member), during stay at an open visit ICU and at 30 and 90-days post-ICU discharge. We hypothesized that there was a positive correlation with the severity of symptoms among pairs and different patterns of suffering over time.

93 citations

Book ChapterDOI
01 Jan 2015
TL;DR: An innovative approach in blended elemental powder metallurgy (PM) of titanium and titanium alloys is described in this paper, which uses titanium hydride powder, resulting in a better balance of mechanical properties as a result of lower residual porosity, lesser contamination, and finer microstructure compared with the use of titanium metal powder.
Abstract: An innovative approach in blended elemental powder metallurgy (PM) of titanium and titanium alloys is described. Its key feature consists of using titanium hydride powder, resulting in a better balance of mechanical properties as a result of lower residual porosity, lesser contamination, and finer microstructure compared with the use of titanium metal powder. The fundamental advantages of titanium hydride–based PM are explained, including the specific compaction mechanism, activated sintering due to a sequence of phase transformations accompanying dehydrogenation, and reactions of surface-located impurities with atomic hydrogen. Efforts to scale up this approach to a commercial level and make it capable to solve the cost–performance dilemma of titanium PM are demonstrated. They include development of new methods for low-cost titanium hydride powder production and its cost-effective processing.

66 citations

Journal ArticleDOI
Ana O. Hoff1, Paulo M. G. Hoff1
TL;DR: Medullary thyroid carcinoma is a neuroendocrine tumor derived from the C cells of the thyroid gland and accounts for approximately 5% of all thyroid carcinomas.
Abstract: Medullary thyroid carcinoma is a neuroendocrine tumor derived from the C cells of the thyroid gland and accounts for approximately 5% of all thyroid carcinomas. Approximately 30% of the cases are associated with an autosomal dominant syndrome called multiple endocrine neoplasia type 2, and the identification of these individuals is important because affected family members may benefit from an early diagnosis. The treatment of this disease is predominantly surgical, and the impact of radiotherapy and chemotherapy is limited. The identification of the associated molecular events has lead to the development of specific molecular targeted agents that may change the way this disease is treated in the near future.

60 citations


Authors
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
202120
202014
201911
201811
201748
201643