Chitin and Chitosan Derivative Membranes in Resources, Energy, Environmental and Medical Field

2019 ◽  
pp. 175-269
Author(s):  
Tadashi Uragami
Keyword(s):  
Chitosan Derivative ◽  
Medical Field ◽  
Chitin And Chitosan

scholarly journals Functional Chitosan Derivative and Chitin as Decolorization Materials for Methylene Blue and Methyl Orange from Aqueous Solution

Materials ◽  
2019 ◽  
Vol 12 (3) ◽  
pp. 361 ◽  
Author(s):  
Abdelkader Labidi ◽  
Asier Salaberria ◽  
Susana Fernandes ◽  
Jalel Labidi ◽  
Manef Abderrabba
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Methyl Orange ◽  
Sticking Probability ◽  
Alternative Methods ◽  
Standard Entropy ◽  
Chitosan Derivative ◽  
Thermodynamic Variables ◽  
Negative Impacts ◽  
Chitin And Chitosan

Dyes are classified as one of the major pollutants of water. They have negative impacts not only on environment but also on human health. In fact, wastewater that contains these harmful substances requires many types of treatments. Therefore, alternative methods and adsorption agents are needed. Herein, we propose to evaluate the decolorization of methylene blue (MB) and methyl orange (MO) as two models of soluble dyes from water using chitin and chitosan-graft-polyacrylamide. Furthermore, the applicability of these biomacromolecules as alternative adsorption agents, their sticking probability and desorption were also examined. Experimental parameters such as dye concentration, contact time, pH solution, adsorbent dosage and temperature were thoroughly examined for the grafted chitosan and chitin. The activation energy ( E a ) and the thermodynamic variables (i.e., standard Gibb’s free energy ( Δ G 0 ), standard enthalpy ( Δ H 0 ), and standard entropy ( Δ S 0 )) were determined using the Van’t Hoff and Arrhenius equations. The sticking probability ( S *) model for MB and MO removal by chitin and the chitosan derivative demonstrated that both dyes were successfully removed under the proposed conditions. Desorption studies of MB and MO showed the reusability of both materials, suggesting their application for removing dyes from aqueous solution.

Analysis of athletes’ stadium stress source based on improved layered K-means algorithm

2020 ◽  
Vol 39 (4) ◽  
pp. 5905-5914
Author(s):  
Chen Gong
Keyword(s):  
Experimental Data ◽  
Machine Learning Algorithms ◽  
User Preference ◽  
Experimental Comparison ◽  
Actual Situation ◽  
Medical Field ◽  
Pressure Source ◽  
Preference Model ◽  
Related Research ◽  
Analysis System

Most of the research on stressors is in the medical field, and there are few analysis of athletes’ stressors, so it can not provide reference for the analysis of athletes’ stressors. Based on this, this study combines machine learning algorithms to analyze the pressure source of athletes’ stadium. In terms of data collection, it is mainly obtained through questionnaire survey and interview form, and it is used as experimental data after passing the test. In order to improve the performance of the algorithm, this paper combines the known K-Means algorithm with the layering algorithm to form a new improved layered K-Means algorithm. At the same time, this paper analyzes the performance of the improved hierarchical K-Means algorithm through experimental comparison and compares the clustering results. In addition, the analysis system corresponding to the algorithm is constructed based on the actual situation, the algorithm is applied to practice, and the user preference model is constructed. Finally, this article helps athletes find stressors and find ways to reduce stressors through personalized recommendations. The research shows that the algorithm of this study is reliable and has certain practical effects and can provide theoretical reference for subsequent related research.

The Therapeutic and Diagnostic Value of Fluorine

2020 ◽  
Vol 4 (1) ◽  
pp. 17-29
Author(s):  
Isma Attique ◽  
Shabbir Hussain ◽  
Muhammad Amjad ◽  
Khalida Nazir ◽  
Muhammad Shahid Nazir
Keyword(s):  
Anticancer Agent ◽  
Chemotherapeutic Agent ◽  
Functional Materials ◽  
Diagnostic Value ◽  
Vital Role ◽  
Malignant Growth ◽  
Medical Field ◽  
Active Nucleus ◽  
Broad Application ◽  
Tracer Atom

Fluorine has a useful positron transmitting isotope and it enjoys broad application in the medical field. It is utilized in fluorinated agents,therapeutic sciences and steroid field. Fluorine incorporation viafluoroalkylation is a useful approach in the development of new functional materials and in drug design. Fluorine also plays its role as an anticancer agent and is a successful chemotherapeutic agent for certain sorts of malignant growth. 5-fluorouracil plays a vital role in the treatment of cancer. 18 Facts as a radio label tracer atom in PET imaging. 19 F has the second most sensitive and stable NMR-active nucleus.

Application of Light Sources to Medical Field

2011 ◽  
Vol 131 (5) ◽  
pp. 332-336
Author(s):  
Takafumi Mizojiri ◽  
Makoto Kimura
Keyword(s):  
Light Sources ◽  
Medical Field

Adaptasi Alat Ukur Kepuasan Kerja Untuk Tenaga K esehatan di Indonesia

PRAXIS ◽  
2019 ◽  
Vol 2 (1) ◽  
pp. 107
Author(s):  
Widawati Hapsari
Keyword(s):  
Job Satisfaction ◽  
Factor Analysis ◽  
Confirmatory Factor Analysis ◽  
Medical Practitioner ◽  
Organizational Setting ◽  
Medical Field ◽  
Satisfaction Scale ◽  
Confirmatory Factor ◽  
Bahasa Indonesia

Abstract Job satisfaction has been an important topic of focus in the organizational setting for the last few decades. This research aims to validate job satisfaction scale in medical practitioner population. The 10 items in this scale consist of 4 extrinsic facet items and 5 intrinsic facet items. This intrument was adapted into Bahasa Indonesia as suggested by Beaton, et al. (2000) and analyzed using confirmatory factor analysis. The study conducted among 287 participants working in the medical field. The study showed that the reliability of intrinsic facet is .811 and extrinsic facet .729. Further analysis found that there is correlation between intrinsic and extrinsic job satisfaction. This study concluded that the job satisfaction scale used in this study is valid and reliable to be applied in medical practitioner in Indonesia. Abstrak Alat ukur kepuasan kerja telah digunakan di berbagai bidang pekerjaan termasuk kesehatan. Sayangnya di Indonesia penelitian mengenai alat ukur ini sendiri masih sangat terbatas, terutama mengenai konstruk kepuasan kerja dengan subjek khusus tenaga kesehatan. Penelitian ini bertujuan untuk mengadaptasi skala kepuasan kerja untuk tenaga kesehatan dari Hills, Joyce dan Humphreys (2012) ke dalam bahasa Indonesia. Proses penerjemahan berdasarkan langkah-langkah yang disarankan oleh Beaton, dkk. (2000). Alat ukur kepuasan kerja yang digunakan terbagi menjadi dua berdasarkan sumbernya, yaitu ekstrinsik dan intrinsik, dengan total 10 aitem. Peserta yang terlibat dalam penelitian ini sebanyak 287 responden. Berdasarkan hasil uji reliabilitas didapatkan koefisien alfa sebesar .811 untuk kepuasan kerja yang bersifat intrinsik dan .729 untuk kepuasan kerja yang bersifat ekstrinsik. Berdasarkan hasil uji validitas dengan teknik faktor analisis dan uji reliabilitas, dapat disimpulkan bahwa alat ukur ini cukup valid dan reliabel untuk diterapkan di Indonesia. Berdasarkan analisis tambahan yang dilakukan, ditemukan hubungan antara sumber kepuasan kerja yang bersifat intrinsik dan ekstrinsik

LOOK AT MEDICINE ATTENTION: PROBLEMS AND SOLUTIONS

2019 ◽  
Vol 24 (2) ◽  
pp. 69-75
Author(s):  
Absalom Khuzhanazarov ◽  
◽  
Shukhrat Allamuratov
Keyword(s):  
History Of Medicine ◽  
Historical Data ◽  
Attention Problems ◽  
Medical Field ◽  
Problems And Solutions ◽  
History Of ◽  
Country Analysis

This article presents historical data and scientific conclusions regarding the history of medicine in our country. Analysis of current problems in the medical field as a result of the reforms implemented over the last three years.

ANTI-CANCER COMPOUNDS ISOLATED FROM SOFT CORAL SINULARIA CRUCIATA - ALCYONIIDAE

2012 ◽  
pp. 84-89
Author(s):  
Quoc Hung Vo ◽  
Nguyen Phuong Nhi Doan ◽  
Dinh Quynh Phu Nguyen ◽  
Thi Dieu Tram Ho ◽  
Thi Hoai Nguyen
Keyword(s):  
Mass Spectrometry ◽  
Soft Coral ◽  
Normal Phase ◽  
Ionization Mass ◽  
Medical Field ◽  
Bioactive Substances ◽  
Anti Cancer ◽  
The World ◽  
Pure Compounds ◽  
Layer Chromatography

Objectives: Nowadays, bioactive substances isolated from marine organisms which are abundant and varied in Vietnamese sea attracted more and more the attention of scientists in the world and Vietnam as well. We have studied on soft coral Sinularia cruciata – Alcyoniidae, which has never been studied in Vietnam before, to find substances which are useful in medical field, especially in anti-cancer therapy. Materials and method: Specimens of soft coral Sinularia cruciata were collected from Con Co, Quang Tri province in May 2011. Pure compounds were isolated by using Thin Layer Chromatography; Column Chromatography normal phase and inverse phase; Shephadex LH 20. Structures of them were determined by spectral data of Nuclear Magnetic Resonance (NMR), Electrospray Ionization Mass Spectrometry (ESI-MS). Results & Conclusion: Structures of 4 compounds were identified: (1) 5.8-epidioxycholest-6-en-3-ol (2) Cholesterol (3) 1-O-hexadecyl-glycerol (Chimyl alcohol) (4) Glycerol 1-O-octadecyl ether (Batyl alcohol). The substance (1) was demonstrated to have strong anti-cancer effects in previous study. Key words Sinularia cruciata, Alcyoniidae, 5,8-epidioxycholest-6-en-3-ol, soft coral, cancer.

Comparison of publication activity level in the medical field in Ukraine and the countries of the worldActivities of higher education institutions in the technology transfer

2020 ◽  
pp. 74-83
Author(s):  
A.B. Osadcha
Keyword(s):  
Web Of Science ◽  
Rapid Development ◽  
Modern Science ◽  
Modern Society ◽  
Scientific Work ◽  
Scientific Activity ◽  
Activity Level ◽  
Publication Activity ◽  
Research Progress ◽  
Medical Field

In the context of the rapid development of scientific and technological progress in Ukraine, including the medical field, a significant contribution belongs to scientific researches based on world recognition, and publications in scientific journals indexed in international bibliometric databases, will lead to the possibility of upgrading modern science in medical higher educational institutions. The most significant in modern society is not only activity process or thought, but the result that scientific research provides. Scientific activity is difficult to evaluate with only one parameter; moreover, there is a need for evaluation using qualitative indicators. The article presents author’s research results of publication activity level in the medical field in Ukraine, taking into account world experience based on international bibliometric database Clarivate Analytics’s Web of Science. Clarivate Analytics accelerates research progress by providing researchers with reliable information sources, analytics around the world, and the ability to quickly create, defend, and commercialize new ideas. Clarivate Analytics is an independent company with more than 4000 employees working in more than 100 countries, and has a well-known brand — Web of Science. It provides access to the largest database of scientific articles from carefully selected reputable journals. Researchers can use effective search instruments that take into account metadata and bibliographic references and allow you to get the highest quality, meaningful and impartial information. Web of Science is an accurate and reliable source of information for assessing scientific work, the most comprehensive resource in which both quality and quantity are equally valued.

Metallic Nanoparticle Synthesis by Green Chemistry

2018 ◽  
Vol 11 (6) ◽  
pp. 4287-4294
Author(s):  
Anikate Sood ◽  
Shweta Agarwal
Keyword(s):  
Green Chemistry ◽  
Green Synthesis ◽  
Biomedical Research ◽  
Metallic Nanoparticles ◽  
Nanoparticle Synthesis ◽  
Synthesis Methods ◽  
Metallic Nanoparticle ◽  
Medical Field ◽  
Advantages And Disadvantages ◽  
Gold Silver

Nanotechnology is the most sought field in biomedical research. Metallic nanoparticles have wide applications in the medical field and have gained the attention of various researchers for advanced research for their application in pharmaceutical field. A variety of metallic nanoparticles like gold, silver, platinum, palladium, copper and zinc have been developed so far. There are different methods to synthesize metallic nanoparticles like chemical, physical, and green synthesis methods. Chemical and physical approaches suffer from certain drawbacks whereas green synthesis is emerging as a nontoxic and eco-friendly approach in production of metallic nanoparticles. Green synthesis is further divided into different approaches like synthesis via bacteria, fungi, algae, and plants. These approaches have their own advantages and disadvantages. In this article, we have described various metallic nanoparticles, different modes of green synthesis and brief description about different metabolites present in plant that act as reducing agents in green synthesis of metallic nanoparticles. 

Sign in / Sign up

Export Citation Format

Share Document