scholarly journals ZNO Nanostructures & Microstructures: Synthesis using Different Materials

Thermal decomposition and heat treatment method is used for the preparation of ZnO and the precursor are used for this is zinc oxalate, zinc nitrate and zinc sulfate after preparation of ZnO study on its optical and electrical properties has also been performed then its photoconductivity in air and two minutes rise and fall curve also measured. Which is very useful in study of switching characteristic of materials. XRD clearly shows that prepared material has good quality of ZnO, SEM indicates that synthesized materials of wurzite structure. Two minutes rise and fall curve shows that zinc oxalate has the best switching time among all three materials

2008 ◽  
Vol 22 (1) ◽  
pp. 41-46
Author(s):  
Rokhani Hasbullah ◽  
◽  
Elpodesy Marlisa ◽  
Ali Parjito ◽  
Edy Hartulistiyoso ◽  
...  

2020 ◽  
Vol 9 (1) ◽  
pp. 1-3
Author(s):  
Corriyanti Corriyanti ◽  
Novinci Muharyani

The teak breeding program has long been conducted by Perum Perhutani and produced superior teak and was named Teak Plus of Perhutani - Jati Plus Perhutani (JPP). With good silviculture practices, JPP-teak of 9 year-old can produce no less than 100 m³/ha, with ± 60 cm of tree circumstance. The high demand for teak wood is an opportunity to develop JPP-teak with fast growing character. Research shows that the quality of JPP wood of 5 and 10 years of age can be classified into Strength Class III. Although the quality of JPP-teak is not equal as the teak gets older, it can be improved through several methods, such as densification, thermal modification, etc. Durability of fast growing JPP-teak can be enhanced by additional treatment with natural or chemical material preservation. Wood color modification can be done through heat treatment method. The color change of JPP-teak of 5 years of age that looked more brownies with variation in value of color change (ΔE*) of 1.04 to 48.53. Modification technology influenced the properties of teak wood and it is an opportunity of JPP to gain added value as a renewable forest resource product. With teak forest area covering 1.7 million hectares, Perum Perhutani has challenges in developing JPP-teak with more added value.


2015 ◽  
Vol 18 (4) ◽  
pp. 55-66
Author(s):  
Ngoc Kim Bui ◽  
Hoang Kim Nguyen

Corundum in Khe Tre area essentially distributes in pegmatite bodies that intruded the granite of Ea Dui complex ((P-Ted) and metamorphic rocks of Ea Rock formation (PR2er). Corundum mainly developed within pegmatite bodies and in contact metasomatic endozone between pegmatite and granite or gneiss. Mineralogical composition of pegmatite is as follows; Major minerals: alkali feldspar (orthoclas, microlin) 60 -70 %, quartz ~ 15 %; Minor minerals: plagioclase, biotite, muscovite Accessory minerals: garnet, zircon, sphene, apatite,...The corundum here was found in intergrowth with feldspar and characterized by dark to dark blue (very rare) hue, opaque diaphaneity, subhedral to anheral crystals and few mineral inclusions. The size of corundum crystals varies from about 2 cm to 5 cm. Rough corundum crystals are rarely of gem value. Most of them can be used only as abrasibve material. For improvement of corundum to be used as gemstones, heat treatment method was proposed.


2013 ◽  
Vol 395-396 ◽  
pp. 887-890
Author(s):  
Mei Hua Zhu ◽  
Jia Wei Lu ◽  
Ying Xi ◽  
Jin Sen Zhang ◽  
Zhe Chen

The fastening is an important part for fastening when laying the rails, which requires sufficient fastening pressure, strength, and durability. This article focuses on the fatigue fracture of the spring clip of a fastening and gets a result that the fracture accounts for alternating twist-bend load by examining macro-fracture. The crack origin is on the surface of the clip where significant decarburization and corrosion exists and its extension makes the clip break by examining metallographic structure and testing micro-hardness. The solution is to improve the heat treatment method and the surface quality avoiding corrosion.


2020 ◽  
Author(s):  
Almira Osmanovic Thunström ◽  
Iris Sarajlic Vuković ◽  
Lilas Ali ◽  
Tomas Larson ◽  
Steinn Steingrimsson

BACKGROUND Immersive virtual reality (VR) games are increasingly becoming part of everyday life. Several studies support immersive VR technology as a treatment method for mental health problems. There is however minimal research into the feasibility, prevalence, and quality of commercially available VR games on commercial platforms as tools for treatment or add on to treatment of mental health problems. OBJECTIVE The aim of this study was to explore the prevalence, feasibility and quality of commercially available games related to psychotherapy on a commercially available platform. METHODS We performed a search for keywords related to diagnosis and treatment strategies of mental health problems. The search was performed during March 27th on STEAM (VR content and gaming platform). A usability scale was used as a tool to look at the interaction and usability of the games, the VR-UI-UX-8. The tool contains 8 statements about usability scored 0-10, 0 indicating “Not at all” and 10 indicating “very much so”. The score ranges from 0-80 with a higher score indicating worse usability. RESULTS In total, 516 hits were found, 371 unique games. After the games were reviewed, 83 games passed the inclusion criteria, were purchased and played. Majority of the games which were excluded were either not connected to mental health, contained violence, adult content or were in other ways irrelevant or inappropriate. The mean score for the games on the VR-UI-UX-8 was 16.5 (standard deviation 15.8) with a range from 0-68. Most relevant and feasible games were found in the search words meditation, mindfulness, and LSD. CONCLUSIONS Commercial platforms hold great potential for VR games with psychotherapeutic components. The platforms are only at the beginning of the development towards serious games, e-learning and psychotherapeutic treatments. Currently the quality and usability for clinical and at home applicability are scarce, but hold great potential.


2021 ◽  
pp. 1080-1084
Author(s):  
Xin-Li Wang ◽  
Jia-Yao Gong ◽  
Yan Xue

Abdominal metastasis is relatively rare in dedifferentiated liposarcoma of the shoulder and back. Surgery is the best treatment option, whether it is radical or palliative surgery. Chemotherapy is the standard systemic treatment for advanced unresectable/metastatic patients, but the therapeutic effect is limited. Here, we treat advanced abdominal dedifferentiated liposarcoma through a comprehensive treatment method of targeting, surgery, and chemotherapy, which improves the quality of life of the patient, and shrinks the tumor significantly.


Foods ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 1610
Author(s):  
Wiesław Przybylski ◽  
Danuta Jaworska ◽  
Katarzyna Kajak-Siemaszko ◽  
Piotr Sałek ◽  
Kacper Pakuła

An increase in the consumption of poultry meat has been observed due to its availability, nutritional value, and delicate flavor. These characteristics make it possible to prepare, with the use of spices and other additives, many different dishes and products for increasingly demanding consumers. The sous-vide technique is increasingly being used to give new sensory attributes to dishes in gastronomy. The study aimed to assess the impact of the heat treatment method, i.e., the sous-vide method, as compared to traditional cooking, on the sensory quality of poultry meat, as well as the efficiency of the process with regard to technological quality. The cooking yield with the sous-vide method of processing poultry meat was higher than with the traditional method of cooking in water (88.5% vs. 71.0%, respectively). The meat was also found to be redder (a* = 254 vs. 074) and less yellow (b* = 1512 vs. 1649), as well as more tender. The sensory quality of chicken breast meat obtained by the sous-vide method was higher in terms of attributes such as color tone, tenderness, juiciness, and overall quality. At the same time, it was lower in terms of the odor of cooked meat and the flavor of cooked meat as compared to meat subjected to traditional cooking.


Author(s):  
José-Manuel Pastora-Bernal ◽  
María-José Estebanez-Pérez ◽  
Guadalupe Molina-Torres ◽  
Francisco-José García-López ◽  
Raquel Sobrino-Sánchez ◽  
...  

COVID-19 can cause important sequels in the respiratory system and frequently presents loss of strength, dyspnea, polyneuropathies and multi-organic affectation. Physiotherapy interventions acquire a fundamental role in the recovery of the functions and the quality of life. Regarding the recovery phases after hospital discharge, the current evidence available is very preliminary. Telerehabilitation is presented as a promising complementary treatment method to standard physiotherapy. The main objective of this research is to evaluate the effectiveness of a personalized telerehabilitation intervention after discharge from hospital for the improvement of functional capacity and quality of life compared to a program of health education and/or care in a rehabilitation center. As secondary objectives, to identify the satisfaction and perception of patients with the telerehabilitation intervention and the presence of barriers to its implementation, as well as to evaluate the cost-effectiveness from the perspective of the health system. This study protocol will be carried out through a single blind multicenter randomized clinical trial in the south of Spain. We hypothesize that the implementation of a telerehabilitation program presents results not inferior to those obtained with the current standard intervention. If the hypothesis is confirmed, it would be an opportunity to define new policies and interventions to address this disease and its consequences. Trial registration NCT04742946.


Carbon ◽  
2021 ◽  
Author(s):  
Kensuke Murashima ◽  
Yuki Kawashima ◽  
Shuhei Ozaki ◽  
Atsushi Tatami ◽  
Masamitsu Tachibana ◽  
...  

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