Search query: Recent 10 years of pervoskite materials

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abstract: In recent years, Moore's law had a remarkable effect on predicting the development of semiconductor technology. As the size of devices shrinks to micro scale or nano scale, Intel's newest 10 nm logic technology is scheduled to start product shipments before the end of 2017. Moore's law will not die out, as the research scale reaches the atomic scale, "new devices" and new interconnection methods are urgently needed. In this paper, based on emerging interconnection requirement, the contribution to the advanced electronic packaging containing novel nano materials, such as the carbon nanotubes, nanoparticles sintering, interconnection of nano solder, nano silver and surface plasma nano welding are discussed. For the next 5 10 years, two new types of interconnect solutions are gaining attentions: solder joint alternatives and Cu electrode alternatives. The former uses new materials such as graphene, carbon nanotubes and nanowires to replace traditional solder joints. The latter uses optical media to replace the traditional Cu metal. In general, advanced materials will make more and more outstanding contributions in the development of electronic packaging in the next 10 20 years.
author_names: Shuye Zhang

Xiangyu Xu

Tiesong Lin

Peng He
title: Recent advances in nano materials for packaging of electronic devices
venue: Journal of Materials Science: Materials in Electronics
year: 2019

abstract: STATEMENT OF PROBLEM The survival and success of tooth supported fixed dental prostheses (FDPs) in long term studies vary greatly, depending on the patient and the size of the FDP. Influencing factors for FDP survival or success may include advanced patient age at the time of FDP treatment, treatment severity, and use of new and cheaper FDP materials. As the patient population ages, prosthodontists will treat tooth wear in a greater number of older adults; however, recent long term studies on such treatments are lacking. PURPOSE The purpose of this retrospective clinical study was to examine extensive, tooth supported FDPs made at 2 specialist clinics in Sweden after 10 years and to compare the outcomes with those of previous studies. MATERIAL AND METHODS Patients rehabilitated by using FDPs of at least 5 units at 2 specialist clinics in Sweden between 2002 and 2006 were recalled after 10 years. Clinical examinations were supplemented by reviewing clinical records and existing radiographs. Statistical analysis was performed by using the Student t test, chi squared test, Fisher exact test, and Kruskal Wallis test (a=.05) RESULTS A total of 152 patients were recalled for clinical examination. Of these, 78 patients attended and were examined. The mean age of the examined group was 70 years (range 36 94) lower than that of those not attending (80 years; range 46 100; P<.05) The mean number of units of the 78 examined FDPs was 7.3 (range 5 12) and 8.0 (range 5 14) for those not examined. FDP configurations in terms of number of units, abutments, pontics, and post and cores did not differ significantly between the 2 groups (P>.05) The survival proportion of the examined 78 FDPs (all units of the original FPD) was 74.4% The success proportion (FDPs without complications) was 52.6% The most frequent complications were caries (14.1% endodontic complications (11.5% loose retainers (7.7% root fractures (5.1% and framework fractures (3.8% FDPs with post and cores (P<.05) and cantilevers (P=.054) especially when in combination (P<.05) showed more complications than FDPs without. Chipping fractures in porcelain were found in 38% of the FDPs (7.7% of the units) with more porcelain fractures on Co Cr frameworks than on gold and titanium alloy frameworks (P<.05) CONCLUSIONS This long term retrospective study indicated that the prognosis for complicated and extensive FDPs in aging patients does not worsen with increased clinical complexity. New materials, treatment complexity, and older patients did not seem to markedly influence prognosis.
author_names: Helena Alsterstal-Englund

L E Moberg

Jenny Petersson

J I Smedberg
title: A retrospective clinical evaluation of extensive tooth supported fixed dental prostheses after 10 years.
venue: The Journal of prosthetic dentistry
year: 2020

abstract: Background Migraine is defined as a recurrent headache of moderate to severe intensity that seriously affects the quality of life. Recent clinical trials have confirmed that acupuncture is effective in treating migraine. We aimed to review the effectiveness of acupuncture in the treatment of migraine by comparing treatment and various control groups in accordance with the newly published guidelines for systematic reviews. Materials and Methods The following databases were searched for relevant articles published from January 1, 2010 to December 31, 2019: Embase, PubMed, Medline, Cochrane Library, and four Chinese databases. The present review included randomized controlled trials in which acupuncture was the sole treatment or an adjunctive treatment for migraine. Two researchers independently conducted the study selection, data extraction, and quality assessment processes. Disagreements between reviewers were solved by discussion and data reanalysis. The quality of each included study was evaluated using the Cochrane Collaboration risk of bias assessment method and the Standards for Reporting Interventions in Controlled Trials of Acupuncture (STRICTA) checklist. Results Forty nine studies were analyzed and ranked based on the latest STRICTA and Cochrane Collaboration risk of bias assessment standards. The analysis revealed that acupuncture reduced headache frequency compared with no treatment (mean difference [MD] 1.80, P 0.00001, 95% confidence interval [CI] 2.34 to 1.26) and western medicine (MD 1.75, P 0.003, 95% CI 2.91 to 0.58) Headache frequency did not significantly differ between patients who received real acupuncture versus those who received sham acupuncture (MD 0.64, P 0.24, 95% CI 1.70 to 0.42) Conclusion The present review evaluated the current research on the use of acupuncture for migraine, compared with various control treatments. The evidence for the effectiveness of acupuncture in controlling migraine is still limited due to the low quality of the published studies.
author_names: Xixiu Ni

Linglin Dong

Tian Tian

Lu Liu

Xiao Li

Fengmei Li

Ling Zhao
title: Acupuncture versus Various Control Treatments in the Treatment of Migraine: A Review of Randomized Controlled Trials from the Past 10 Years
venue: Journal of pain research
year: 2020

abstract: Background: Guided growth through temporary hemiepiphysiodesis has gained acceptance as the preferred primary treatment in treating pediatric lower limb deformities as it is minimally invasive with a lesser morbidity than the traditional osteotomy. The tension band plate is the most recent development in implants used for temporary hemiepiphysiodesis. Our aim was to determine its safety and efficacy in correcting coronal plane deformities around the knee in children younger than 10 years. Materials and Methods: A total of 24 children under the age of 10 were operated for coronal plane deformities around the knee with a single extra periosteal tension band plate and two nonlocking screws. All the children had a pathological deformity for which a detailed preoperative work up was carried out to ascertain the cause of the deformity and rule out physiological ones. The average age at hemiepiphysiodesis was 5 years 3 months (range: 2 years to 9 years 1 month) Results: The plates were inserted for an average of 15.625 months (range: 7 months to 29 months) All the patients showed improvement in the mechanical axis. Two patients showed partial correction. Two cases of screw loosening were observed. In the genu valgum group, the tibiofemoral angle improved from a preoperative mean of 19.89deg valgus (range: 10deg valgus to 40deg valgus) to 5.72deg valgus (range: 2deg varus to 10deg valgus) In patients with genu varum the tibiofemoral angle improved from a mean of 28.27deg varus (range: 13deg varus to 41deg varus) to 1.59deg valgus (range: 0 8deg valgus) Conclusion: Temporary hemiepiphysiodesis through the application of the tension band plate is an effective method to correct coronal plane deformities around the knee with minimal complications. Its ease and accuracy of insertion has extended the indication of temporary hemiepiphysiodesis to patients younger than 10 years and across a wide variety of diagnosis including pathological physis, which were traditionally out of the purview of guided growth.
author_names: Ruta M Kulkarni

Faizaan M Ilyas Rushnaiwala

Gs Kulkarni

Rajiv Negandhi

Milind Govind Kulkarni

Sunil Govind Kulkarni
title: Correction of coronal plane deformities around the knee using a tension band plate in children younger than 10 years
venue: Indian journal of orthopaedics
year: 2015

abstract: Purpose This study was conducted to analyze the clinical characteristics and treatments of patients with genitourinary tuberculosis (GUTB) over the past 10 years. Materials and Methods The study population comprised 101 patients who were diagnosed with GUTB and hospitalized from January 2000 to December 2009. Acid fast bacilli (AFB) smear, urine tuberculosis culture, urine tuberculosis polymerase chain reaction (PCR) intravenous urography, cystoscopy, and histopathologic findings were used for patient selection. Yearly proportion, gender, patient distribution according to age, history of tuberculosis, and presence of other organ tuberculosis were analyzed. Results The patients hospitalized with GUTB counted for 0.9% of all patients admitted to the department of urology. The sex ratio was 1:1.53 (male:female) and the patients' mean age was 45.57+ 12.55 years (range, 19 81 years) Among the patients, there was one immunocompromised patient. A total of 22 patients (21.8% had a medical history of tuberculosis, mostly pulmonary tuberculosis (90.9% The sensitivity of AFB stain, tuberculosis culture, and PCR was 41.6% 55.4% 33.7% respectively. A total of 54 patients required additional surgical treatment: 30 cases of nephrectomy, 8 cases of epididymectomy, 8 cases of ureteral stent, 5 cases of nephrostomy, 1 case of ureterectomy, 1 case of augmentation cystoplasty, and 1 case of transurethral resection of prostate. Conclusions The frequency of GUTB tended to decrease progressively. However, GUTB is still a threat to public health. There was no previous history of tuberculosis in two thirds of the cases of GUTB and more than half of them required further surgical treatment.
author_names: Joo Yong Lee

Hee Young Park

Sung Yul Park

Seung Wook Lee

Hong Sang Moon

Yong Tae Kim

Tchun-Yong Lee

Hae Young Park
title: Clinical Characteristics of Genitourinary Tuberculosis during a Recent 10 Year Period in One Center
venue: Korean journal of urology
year: 2011

abstract: ABSTRACT The number of snakes donated to the Brazilian Instituto Butantan has been decreasing in the past 10 years. This circumstance motivated us to compare the properties of five venom pools of Bothrops jararaca snake stored for up to 54 years. Results showed differences among venom pools regarding enzymatic and other biological activities, such as caseinolytic, phospholipase A2, hemorrhagic and coagulant activities, as well as antigenicity. Protein content, reverse phase chromatographic profile, and immunorecognition by commercial Bothrops antivenom were comparable for all venom pools, although lethality of the most recent preparations was higher. Since the lowest functional activities did not always correspond to older venoms, differences among venom pools used for antivenom production during the period 1963 2008 may correlate with the different proportions of venoms from different localities used in their generation, rather than to long term storage. We conclude that B. jararaca venoms properly stored for long periods of time retain their structural and pharmacological activities, thus representing useful materials for scientific research and antivenom production. Graphical abstract Figure. No Caption available. HighlightsBioactivities of Bothrops jararaca venom pools stored for up to 54 years were analyzed.Protein content, chromatographic and immunorecognition profile were comparable for all venom pools.Lethality of lyophilized venom pools (1997 and 2008) was higher than that of venom pools dried at RT (1963, 1973, 1977 88).Vintage venom collections represent valuable materials for research purposes and possibly for the production of antivenom.
author_names: Daniela Miki Hatakeyama

Karen de Morais-Zani

Caroline Serino-Silva

Kathleen Fernandes Grego

Savio Stefanini Sant'anna

Wilson Fernandes

Patricia Antonia Estima Abreu de Aniz

Ricardo Jose Soares Torquato

Aparecida S Tanaka

Libia Sanz

Juan J Calvete

Anita Mitico Tanaka-Azevedo
title: Examination of biochemical and biological activities of Bothrops jararaca (Serpentes: Viperidae; Wied Neuwied 1824) snake venom after up to 54 years of storage
venue: Toxicon official journal of the International Society on Toxinology
year: 2018

abstract: The promising and extraordinary properties of graphene have attracted significant interest, making graphene an alternative to replace many traditional materials for many applications, particularly in conductive ink for the fabrication of flexible electronics. For the past 10 years, numerous studies have been reported on the synthesis of graphene conductive ink for printing on flexible substrates for various electronic applications. The development of graphene based ink is reviewed, with the main focus on the types of graphene like materials in conductive inks, and the compositions and important properties of those inks. Another intention behind this review is to compare the pros and cons of graphene based ink with those using other common conductive materials, such as gold nanoparticles, silver nanoparticles, copper nanoparticles, conductive polymers and carbon nanotubes. Recent works on graphene hybrid based ink containing other metallic nanoparticles as an alternative way to improve the electrical properties of the conductive inks are also reported. Brief comparisons between inkjet printing and other printing techniques for the fabrication of flexible electronics are discussed.
author_names: D S Saidina

Netnapa Eawwiboonthanakit

Mustapha Mariatti

Sebastien Fontana

Christian Herold
title: Recent Development of Graphene Based Ink and Other Conductive Material Based Inks for Flexible Electronics
venue: Journal of Electronic Materials
year: 2019

abstract: PurposeGrowing awareness of the environmental performance of construction products and buildings brings about the need for a suitable method to assess their environmental performance. Life cycle assessment (LCA) has become a widely recognised and accepted method to assess the burdens and impacts throughout the life cycle. This LCA based information may be in the form of environmental product declarations (EPD) or product environmental footprints (PEF) based on reliable and verifiable information. All of these use LCA to quantify and report several environmental impact categories and may also provide additional information. To better understand on the one hand existing EPD programmes (EN 15804) for each country and on the other the recent developments in terms of EU reference document (e.g. PEF) the authors decided to write this review paper based on the outcomes of the EPD workshop that was held prior to SB13 Graz conference.MethodsThis paper presents the state of the art in LCA and an overview of the EPD programmes in five European countries (Austria, Belgium, France, Germany, Switzerland) based on the workshop in the first part and a comprehensive description and comparison of the PEF method and EN 15804 in the second part. In the last part, a general conclusion will wrap up the findings and results will provide a further outlook on future activities.Results and discussionThe high number of EPD programmes underlines the fact that there is obviously a demand for assessments of the environmental performance of construction materials. In the comparison between and experiences of the different countries, it can be seen that more similarities than differences exist. A comparison between PEF and EPD shows differences, e.g. LCIA impact categories and recycling methodology.ConclusionsIndependent of raising awareness of the construction material environmental performance, the existence of so many environmental claims calls for clarification and harmonisation. Additionally, construction materials being assessed in the voluntary approaches have to follow the harmonised approach following the principles of the European Construction Products Regulation (regulated) not to foster barriers of trade. The authors therefore highly appreciate the most recent activities of the sustainability of construction works (CEN/TC 350 committee http:/portailgroupe.afnor.fr/public_espacenormalisation/CENTC350/index.html) currently working on these issues at the EU level. Finally, the LCA community is further encouraged to increase the background life cycle inventory data and life cycle inventory modelling as well as the meaningfulness of certain environmental impact categories, such as toxicity, land use, biodiversity and resource usage.
author_names: Alexander Passer

S Lasvaux

Karen Allacker

Dieter De Lathauwer

Carolin Spirinckx

Bastian Wittstock

Daniel Kellenberger

Florian Gschosser

J N Wall

Holger Wallbaum
title: Environmental product declarations entering the building sector: critical reflections based on 5 to 10 years experience in different European countries
venue: The International Journal of Life Cycle Assessment
year: 2015

abstract: The advent of new technologies in the field of medicine and dentistry is giving improvements that lead the clinicians to have materials and procedures able to improve patients' quality of life. In dentistry, the last digital techniques offer a fully digital computerized workflow that does not include the standard multiple traditional phases. The purpose of this study is to evaluate all clinical trials and clinical randomized trials related to the digital or dental impression technique in prosthetic dentistry trying to give the readers global information about advantages and disadvantages of each procedure. Data collection was conducted in the main scientific search engines, including articles from the last 10 years, in order to obtain results that do not concern obsolete impression techniques. Elsevier, Pubmed and Embase have been screened as sources for performing the research. The results data demonstrated how the working time appears to be improved with digital workflow, but without a significant result (P 0.72596) The papers have been selected following the Population Intervention Comparison Outcome (PICO) question, which is related to the progress on dental impression materials and technique. The comparison between dentists or practitioners with respect to classic impression procedures, and students open to new device and digital techniques seem to be the key factor on the final impression technique choice. Surely, digital techniques will end up supplanting the analogical ones altogether, improving the quality of oral rehabilitations, the economics of dental practice and also the perception by our patients.
author_names: Marco Cicciu'

Luca Fiorillo

Cesare D'Amico

Dario Gambino

Emanuele Mario Amantia

Luigi Laino

Salvatore Crimi

Paola Campagna

Alberto Bianchi

Alan Scott Herford

Gabriele Cervino
title: 3D Digital Impression Systems Compared with Traditional Techniques in Dentistry: A Recent Data Systematic Review
venue: Materials
year: 2020

abstract: Purpose We studied the results of urine cultures and antimicrobial sensitivity tests according to the voiding method used by spinal cord injury (SCI) patients over a recent 10 year period. Materials and Methods We retrospectively analyzed 1,236 urine samples and their antimicrobial sensitivity tests for 112 patients who had used only one voiding method between January 2000 and December 2009. The voiding methods were classified into four groups: clean intermittent catheterization (CIC) suprapubic catheterization, urethral Foley catheter, and spontaneous voiding. Results Of the 1,236 urine samples, 925 (74.8% were positive and 279 (30.2% had more than one bacteria. The CIC group showed the lowest rate of bacteriuria, colony counts, and polymicrobial infection (p<0.001) Causative organisms were mostly Gram negative bacteria (84% including Pseudomonas aeruginosa (22.9% Escherichia coli (21.1% Klebsiella species (6.7% and Citrobacter species (6.3% The rate of Gram positive bacterial infection was 13.6% and major pathogenic organisms were Streptococcus species (8.6% and Staphylococcus species (2.6% Major pathogenic organisms and the results of antimicrobial sensitivity tests differed according to the voiding method. Conclusions Although the patient's condition and preferences are important when choosing the method of bladder management, CIC is the best voiding method for reducing urinary tract infections in SCI patients. When immediate use of antibiotics is needed for treatment of urinary tract infections, an appropriate antibiotic can be chosen according to the voiding method on the basis of our study and can be administered before the results of an antimicrobial sensitivity test are available.
author_names: Kyoung Ho Ryu

Yun Beom Kim

Seung Ok Yang

Jeong Kee Lee

Tae Young Jung
title: Results of Urine Culture and Antimicrobial Sensitivity Tests According to the Voiding Method Over 10 Years in Patients with Spinal Cord Injury
venue: Korean journal of urology
year: 2011