• Title/Summary/Keyword: new health technology

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Water-blocking Asphyxia of N95 Medical Respirator During Hot Environment Work Tasks With Whole-body Enclosed Anti-bioaerosol Suit

  • Jintuo Zhu;Qijun Jiang;Yuxuan Ye;Xinjian He;Jiang Shao;Xinyu Li;Xijie Zhao; Huan Xu;Qi Hu
    • Safety and Health at Work
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    • v.14 no.4
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    • pp.457-466
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    • 2023
  • Background: During hot environment work tasks with whole-body enclosed anti-bioaerosol suit, the combined effect of heavy sweating and exhaled hot humid air may cause the N95 medical respirator to saturate with water/sweat (i.e., water-blocking). Methods: 32 young male subjects with different body mass indexes (BMI) in whole-body protection (N95 medical respirator + one-piece protective suit + head covering + protective face screen + gloves + shoe covers) were asked to simulate waste collecting from each isolated room in a seven-story building at 27-28℃, and the weight, inhalation resistance (Rf), and aerosol penetration of the respirator before worn and after water-blocking were analyzed. Results: All subjects reported water-blocking asphyxia of the N95 respirators within 36-67 min of the task. When water-blocking occurred, the Rf and 10-200 nm total aerosol penetration (Pt) of the respirators reached up to 1270-1810 Pa and 17.3-23.3%, respectively, which were 10 and 8 times of that before wearing. The most penetration particle size of the respirators increased from 49-65 nm before worn to 115-154 nm under water-blocking condition, and the corresponding maximum size-dependent aerosol penetration increased from 2.5-3.5% to 20-27%. With the increase of BMI, the water-blocking occurrence time firstly increased then reduced, while the Rf, Pt, and absorbed water all increased significantly. Conclusions: This study reveals respirator water-blocking and its serious negative impacts on respiratory protection. When performing moderate-to-high-load tasks with whole-body protection in a hot environment, it is recommended that respirator be replaced with a new one at least every hour to avoid water-blocking asphyxia.

Efficiency of Hurdle Technology Applied to Raw Cured Meat (Si-Raw)Processing

  • Chen, Ming-Tsao;Lin, Young-Sun;Tsai, Hung-Tsung;Kuo, Hsiu-Lan
    • Asian-Australasian Journal of Animal Sciences
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    • v.15 no.11
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    • pp.1646-1652
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    • 2002
  • Si-Raw is a raw cured meat (raw, cured meat fermented with steamed rice) produced by the aboriginal people of Taiwan. In order to prevent food poisoning or intoxication from botulism, new methods of monitoring the production base on hurdle technology were investigated. New methods investigated incorporated citric acid, sodium hypophosphite, Monascus anka mash, plum paste or lactic acid bacteria inoculum added separately to meat with steamed rice and salt to lower the Aw (water activity) and pH values of the products to control the microbial growth. Results showed that anaerobic bacterial counts, lactic acid bacterial counts and aerobic bacterial counts for the products of all treatments were less than $10^6$, $10^5$ and $10^2cfu/g$, respectively. Sodium chloride content of all products was above 5.46%, water activity was below 0.939 and pH value was below 4.27. IMP was lower and ATP and hypoxanthine were higher. ATP concentrations were higher in the samples which contained the anka mash. Result of sensory panel test indicated that most people preferred the products with added sodium hypophosphite. Except for the fact that the content of tryptamine in the sample with Monascus anka mash was higher, the amine concentrations for all treatments were lower than those of other fermented meat products. The amino acid nitrogen content was higher in the product made from raw meat treated with citric acid, but lower in the other products. Neither Clostridium botulinum nor Trichinella spiralis were detected in any of the treatments. The result may indicate that hurdle technology is effective for hygiene and safe producing Si-Raw.

Effect of New Foot-bath Facility and Solution on Foot Health in Lactating Dairy Cows (신개발 세족기 및 세족액의 젖소 적응효과)

  • Baek, K.S.;Kim, B.H.;Park, S.B.;Park, S.J.;Kim, H.S.;Lee, W.S.;Ki, K.S.;Jeon, B.S.;Ahn, B.S.;Kang, S.J.;Suh, G.H.
    • Journal of Animal Environmental Science
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    • v.12 no.3
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    • pp.107-114
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    • 2006
  • This study was carried out to investigate the effect of new foot-bath facility and detergent solution (sodium molylbdenate, citrate, potassium nitrate, tataric acid, sodium hypo-cholorite, and zinc sulfate) on claw health in lactating dairy cows. Minimal inhibition concentration (MIC) and minimal bactericidal concentration (MBC) of copper sulphate were 0.31% for E. coli and Bacillus isolated from cows claw. The MIC and MBC of new detergent for E. coli were 1.25% and 5%, respectively, however their respectively values for Bacillus were noticed 0.63% and 2.5%. Both 5E. coli and Bacillus populations in petri-dishes were significantly reduced (more than 95%) with the application of new detergent solution (5% or 16%). Locomotion score (LS 1-5; very good to severely bad) of lactating cows were significantly improved with in 30 days with the use of new detergent solution in foot bath. The LS2 (n=16), LS3 (n=16), and LS4 (n=7) were shown 100%, 43.8%, and 14.3% recovery rate within 30 days with the use of new detergent solution. However, LS5 (n=2) were not recovered to normal claw health and locomotion score within 30 days of new detergent application. Usage of new detergent solution for 60 days in a foot bath have shown 81.3%, 71.4% and 50.0% recovery rate in cows with LS3, LS4 and LS5, respectively. Abnormal claw incidence was reduced from 18.8% to 1.5% in overall herd (n=80) with the use of new detergent solution (16%) in a foot bath for 90 days. In conclusion, usage of 16% of our detergent solution for 60 days in a foot bath can significantly improve the cow claw health and thus mitigate the negative effects of abnormal claw on productivity of cows and dairy farm income.

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Effects of Ego-Resilience, Family Function and Acculturative Stress on Mental Health of the Youth of Multicultural Families (다문화가정 청소년의 자아탄력성과 가족기능, 문화적응 스트레스가 정신건강에 미치는 영향)

  • Song, Soon-Taek;Choi, Hee-Chul
    • Journal of Convergence for Information Technology
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    • v.10 no.2
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    • pp.116-125
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    • 2020
  • This study examined the effect of ego-resilience, function of family, stress of adapting to a new culture perceived by youth from multi-cultural families at Gyeonggi-do on their mental health. In doing so, the study sought to suggest effective supportive visits to enhance their mental health. For this, the study carried out a descriptive analysis, t-test, one-way anova, hierarchical regression analysis among 304 middle schoolers from multi-cultural families living at Gyeonggi-do. The study found following results. The higher youth from multi-cultural family perceived the procedural stress, sub-variable of stress of adapting to a new culture and the lower they perceived emotional control, sub-variable of ego-resilience, the higher depression and anxiety they experienced, resulting in worsening of their mental health state. Based on these findings, the study, in order to enhance the mental health of youth from multi-cultural family and their ego-resilience, discussed and suggested development of psychological/emotional programs, preparation of supportive measures to overcome their stress in the course of their cultural adaptation as well as systematic supplementation of related laws in support of multi-cultural families.

DEVELOPMENT OF A NEW MODEL OF DRYING SYSTEM FOR HIGH YIELD OF THE HEAVEN GRADE GINSENG

  • Chang, D.I.;Bahng, S.H.;Chang, Y.H.;Kang, H.Y.
    • Proceedings of the Korean Society for Agricultural Machinery Conference
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    • 2000.11b
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    • pp.370-377
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    • 2000
  • The red ginseng is very popular as a health food. It has been manufactured with raw ginseng by the conventional method. But, the yield of the heaven grade ginseng (the best quality red ginseng) among the whole products is around 5-7%, Therefore, the yield should be improved in order to increase economic returns. In this study, a new model of drying system was developed to improve the yield of heaven grade ginseng from 7% to 15% or more. For this system, temperature and relative humidity were controlled by the feedback control system, and a solenoid valve for steam supply and other variables were controlled by the PC. The special features of this system developed are an image processing system for monitoring the red ginseng during the drying process in the drying chamber, and a cylindrical porous tray for holding ginseng that is rotating with the speed of 0-10rpm in the drying chamber and makes uniform drying of red ginseng possible.

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A Study On Environment and Future of Furniture Design (가구디자인의 환경과 미래에 관한 연구)

  • Kim, Jong-Seo;Kim, Myung-Tae;Kim, Chung-Ho
    • Journal of the Korea Furniture Society
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    • v.16 no.2 s.30
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    • pp.13-26
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    • 2005
  • A Culture is not the fashion that can be changed and created lightly. However, a small number of people are creating and leading the fashion for the foundation of a culture. For example, the fashion in Tokyo spreads across the nation, the fashion in Europe, USA and all over the world are under the influence of Paris, California and New York. Now, we should think about - what is the our consideration to be a member of the minority? What is the today's trend and how will be the future environment of interior, exterior and furniture design? Which one is the measure of the value for leading the culture? The answers in the design area are the creating new value and health in various design styles - Minimal, Organic, Multiple, Natural, Intelligent Life Style. Also this analysis of these trend should be more necessary for the space and environment design area of future than the furniture design area.

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Antioxidant and Bioactive Films to Enhance Food Quality and Phytochemical Production during Ripening

  • Min Byungjin;Dawson Paul L.;Shetty Kalidas
    • Food Science of Animal Resources
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    • v.25 no.1
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    • pp.60-65
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    • 2005
  • Antioxidant films are one active packaging technology that can extend food shelf-life through preventing lipid oxidation, stabilizing color, maintaining sensory properties and delaying microbial growth in foods. Because raw, fresh and minimal processed foods are more perishable during storage or under display conditions than further processed foods, they rapidly lose their original quality. Foods are susceptible to physical, chemical, and biochemical hazards to which packaging films can be effective barriers. Although films incorporated natural (tocopherols, flavonoids and phenolic acids) or synthetic antioxidants (BHT, BHA, TBHQ, propyl gallate) have been extensively tested to improve quality and safety of various foods, food applications require addressing issues such as physical properties, chemical action, cost, and legal approval. Increased interest in natural antioxidants as substitutes for synthetic antioxidants has triggered research on use of the new natural antioxidants in films and coatings. Use of new components (phytochemicals) as film additives can improve food quality and human health. The biosynthesis of plant phenolics can potentially be optimized by active coatings on harvested fruits and vegetables. These coatings can trigger the plants natural proline-linked pentose phosphate pathway to increase the phenolic contents and maintain overall plant tissue quality. This alternate metabolic pathway has been proposed by Dr. K. Shetty and is supported by numerous studies. A new generation of active food films will not only preserve the food, but increase food's nutritional quality by optimizing raw food biochemical production of phytochemicals.

The Consideration of Definition of Physical Therapy in South Korea (한국 물리치료 정의에 관한 고찰)

  • Song, Min-Young;Choi, Mun-Hee;Kim, Kyoung-Mo;Lee, Kyung-Soon
    • Journal of the Korean Society of Physical Medicine
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    • v.5 no.2
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    • pp.133-141
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    • 2010
  • Purpose : To contribute to the development and globalization of physical therapy in south korea. In the near future setting up the new definition of physical therapy making up for present problem and analysis of the physical therapy business. Methods : Checking the definition of physical therapy be in use, and then we draw a new concept and definition according to the job description at ICF of WHO, WCPT, Korea Job Information System, National Health Personnel Licensing Examination Board Analyses. Results : The existing Definition of the korea physical therapy is focus on physical factor and rehabilitation. But, new Definition of physical therapy is contain prevention, functional limitation, therapy of disorder and be made up of definition more detailed and specialized. Conclusion : If definition of the physical therapy out of WCPT used modify and supplement for Korean society, help globalization as well as public relations of national at the Korea physical therapy and take rights physical therapist.

An Automatic Focusing Method Using Establishment of Step Size from Optical Axis Interval (광학축 간격의 스텝크기 설정을 통한 오토포커싱 방법)

  • Kim, Gyung Bum;Moon, Soon Hwan
    • Journal of the Semiconductor & Display Technology
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    • v.14 no.1
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    • pp.7-11
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    • 2015
  • In this paper, an automatic focusing method has been proposed for speedy and reliable measurement and inspection in industry. It is very difficult to determine focusing step size and moving direction in one camera autofocusing. The proposed method can improve speed and accuracy of focusing by using the optical axis interval of two cameras, which is automatically set up as focusing step size. Also, it can determine moving direction from focus value comparisons of two cameras, and then solve ambiguity of one camera focusing. Its performance is verified by experiments. It is expected that it can apply to optical system for measurement and inspection in industry fields.

A study on the marginal fitness to reuse with a Au-Pt-Pd alloy for porcelain fused to metal crown (도재용 금합금 재사용에 따른 변연 적합도에 관한 연구)

  • Moon, Hee-Kyung
    • Journal of Technologic Dentistry
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    • v.32 no.1
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    • pp.17-21
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    • 2010
  • This experimental study was to determine the fitness in each cervical margin of reusing porcelain gold alloy. The gold alloy used in this experimental study was a Au-Pt-Pd alloy (BDCG-898, Bukwang Inc, Korea) for the fabrication of porcelain fused to metal crown. Twenty-five copings were divided into the five groups. And the group A, B, C, D and E were cording successively according to the frequency of reuse to five times. Each specimen was reused without adding new metal. The experimental results were as follows: 1. The group A, B, C showed good fitness in each cervical margin. 2. The group D got good fitness in labio and linguo cervical margin, but the mesio and disto cervical margin showed more than $40{\mu}m$ 3. The group E showed worse fitness than the other groups in each cervical margin.