Progressive Screening of Thermostable Yeasts for Phytase Production

Edi Franciele Ries,Gabriela Alves Macedo 한국식품과학회 2009 Food Science and Biotechnology Vol.18 No.3

Biotechnological phytase preparations are commercially available and are currently used in animal feeding. However, thermostability constraints, low yields, and the high cost of the enzyme have limited its use. This study represents a new perspective for the food enzyme market. The research screened thermostable yeast strains for their ability to produce phytase. The screening was carried out with a gradual increase in temperature (30-48℃). Sixteen strains (1 strain identified as Saccharomyces cerevisiae) maintained the ability to produce phytase at 48℃ and their phytase activity was confirmed using 2 phytase assay methodologies. The yeast strains tested in this study seem to be potential efficient producers of phytase, indicating a possible new source of thermostable phytase of commercial interest, particularly that from S. cerevisiae.

Fuse Protection of IGBT Modules against Explosions

Blaabjerg, Fred,Ion, Florin,Ries, Kareten The Korean Institute of Power Electronics 2002 JOURNAL OF POWER ELECTRONICS Vol.2 No.2

The demand for protection of power electronic application has during the last couple of vears increased regarding the high-power IGBT modules. Even with an active protection, a high power IGBT still has a risk of exhibiting a violent rupture in the case of a fault if IGBT Fuses do not protect it. By introducing fuses into the circuit this will increase the circuit inductance and slight inductance over-voltage during the turn-off of the diode and the IGBT. It is therefore vital when using fuses that the added inductance is kept at a minimum. This paper discuss three issues regarding the IGBT Fuse protection of adding inductance of existing High-speed and new Typower Fuse protection. First, the problem of adding inductance of exiting High-speed and new Typower Fuse DC-link circuit is treated, second a short discussion of protection of the IGBT module is done, and finally, the impect of the high frwquency loading on the currying capability of the fuses is presented.

Fuse Protection of IGBT Modules against Explosions

Frede Blaabjerg,Florin Iov,Karsten Ries 전력전자학회 2001 ICPE(ISPE)논문집 Vol.2001 No.10

The demand for protection of power electronic applications has during the last couple of years increased regarding the high-power IGBT modules Even with an active protection, a high power IGBT still has a risk of exhibiting a violent rupture in the case of a fault if IGBT Fuses do not protect it By introducing ruses into the circuit this will increase the circuit inductance and slight increase the over-voltage during the turn-off of the diode and the IGBT It is therefore vital when using fuses that the added inductance is kept at a minimum This paper discuss three issues regarding the IGBT Fuse protection First, the problem of adding inductance of existing High-Speed and new Typower fuses in DC-link circuit is treated, second a short discussion of the protection of the IGBT module is done, and finally, the impact of the high frequency loading on the current carrying capability of the fuses is presented.<br/>

International incidence of childhood cancer, 2001–10: a population-based registry study

Steliarova-Foucher, Eva,Colombet, Murielle,Ries, Lynn A G,Moreno, Florencia,Dolya, Anastasia,Bray, Freddie,Hesseling, Peter,Shin, Hee Young,Stiller, Charles A Lancet Pub. Group 2017 LANCET ONCOLOGY Vol.18 No.6

<P><B>Summary</B></P><P><B>Background</B></P><P>Cancer is a major cause of death in children worldwide, and the recorded incidence tends to increase with time. Internationally comparable data on childhood cancer incidence in the past two decades are scarce. This study aimed to provide internationally comparable local data on the incidence of childhood cancer to promote research of causes and implementation of childhood cancer control.</P><P><B>Methods</B></P><P>This population-based registry study, devised by the International Agency for Research on Cancer in collaboration with the International Association of Cancer Registries, collected data on all malignancies and non-malignant neoplasms of the CNS diagnosed before age 20 years in populations covered by high-quality cancer registries with complete data for 2001–10. Incidence rates per million person-years for the 0–14 years and 0–19 years age groups were age-adjusted using the world standard population to provide age-standardised incidence rates (WSRs), using the age-specific incidence rates (ASR) for individual age groups (0–4 years, 5–9 years, 10–14 years, and 15–19 years). All rates were reported for 19 geographical areas or ethnicities by sex, age group, and cancer type. The regional WSRs for children aged 0–14 years were compared with comparable data obtained in the 1980s.</P><P><B>Findings</B></P><P>Of 532 invited cancer registries, 153 registries from 62 countries, departments, and territories met quality standards, and contributed data for the entire decade of 2001–10. 385 509 incident cases in children aged 0–19 years occurring in 2·64 billion person-years were included. The overall WSR was 140·6 per million person-years in children aged 0–14 years (based on 284 649 cases), and the most common cancers were leukaemia (WSR 46·4), followed by CNS tumours (WSR 28·2), and lymphomas (WSR 15·2). In children aged 15–19 years (based on 100 860 cases), the ASR was 185·3 per million person-years, the most common being lymphomas (ASR 41·8) and the group of epithelial tumours and melanoma (ASR 39·5). Incidence varied considerably between and within the described regions, and by cancer type, sex, age, and racial and ethnic group. Since the 1980s, the global WSR of registered cancers in children aged 0–14 years has increased from 124·0 (95% CI 123·3–124·7) to 140·6 (140·1–141·1) per million person-years.</P><P><B>Interpretation</B></P><P>This unique global source of childhood cancer incidence will be used for aetiological research and to inform public health policy, potentially contributing towards attaining several targets of the Sustainable Development Goals. The observed geographical, racial and ethnic, age, sex, and temporal variations require constant monitoring and research.</P><P><B>Funding</B></P><P>International Agency for Research on Cancer and the Union for International Cancer Control.</P>

Fuse Protection of IGBT Modules against Explosions

Frede Blaabjerg,Florin Iov,Karsten Ries 전력전자학회 2002 JOURNAL OF POWER ELECTRONICS Vol.2 No.2

The demand for protection of power electronic applications has during the last couple of years increased regarding the high-power IGBT modules. Even with an active protection, a high power IGBT still has a risk of exhibiting a violent rupture in the case of a fault If IGBT Fuses do not protect it By introducing fuses unto the circuit this will increase the circuit inductance and slight increase the over-voltage during the turn-off of the diode and the IGBT It is therefore vital when using fuses that the added inductance is kept at a minimum This paper discuss three issues regarding the IGBT Fuse protection First, the problem of adding inductance of existing High-Speed and new Typower fuses in DC-link circuit is treated, second a short discussion of the protection of the IGBT module is done, and finally, the impact of the high frequency loading on the current carrying capability of the fuses is presented

Photometric observations of the Baptistina asteroid family

Myung-Jin Kim,Young-Jun Choi,Hong-Kyu Moon,Orhan Erece,Judit Gyorgyey Ries,Suleyman Kaynar,Murat Kaplan,Zeki Eker 한국천문학회 2015 天文學會報 Vol.40 No.1

Complex Chiral Colloids and Surfaces via High-Index Off-Cut Silicon

McPeak, Kevin M.,van Engers, Christian D.,Blome, Mark,Park, Jong Hyuk,Burger, Sven,Gosá,lvez, Miguel A.,Faridi, Ava,Ries, Yasmina R.,Sahu, Ayaskanta,Norris, David J. American Chemical Society 2014 NANO LETTERS Vol.14 No.5

<P>Silicon wafers are commonly etched in potassium hydroxide solutions to form highly symmetric surface structures. These arise when slow-etching {111} atomic planes are exposed on standard low-index surfaces. However, the ability of nonstandard high-index wafers to provide more complex structures by tilting the {111} planes has not been fully appreciated. We demonstrate the power of this approach by creating chiral surface structures and nanoparticles of a specific handedness from gold. When the nanoparticles are dispersed in liquids, gold colloids exhibiting record molar circular dichroism (>5 × 10<SUP>9</SUP> M<SUP>–1</SUP> cm<SUP>–1</SUP>) at red wavelengths are obtained. The nanoparticles also present chiral pockets for binding.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/nalefd/2014/nalefd.2014.14.issue-5/nl501032j/production/images/medium/nl-2014-01032j_0005.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nl501032j'>ACS Electronic Supporting Info</A></P>

The Impact of menopause to the Well-Being of Women

Abraham B. Asto,Asuncion L Campolet,Kimberly R. Abrenica,Jeric Voltaire D. Cruz,Earl Kristoffer C. De Guia,Aubrey Marie R. Espiritu,Carra Louise C. Esteban,Emelene A. Hipol,Zyra April R. Martinez,Ries 한국간호과학회 2011 한국간호과학회 학술대회 Vol.2011 No.10

터널팬 샤프트 환기 방식에 따른 열 및 연기배출효과에 관한 연구

Rie,Dong-Ho,Yoo,Ji-Oh 한국화재소방학회 2004 한국화재소방학회논문지 Vol.18 No.2

지하철은 다른 구조물과 비교하여 화재발생 시 화재진압 및 인명구조에 본질적으로 취약한 구조적 특성을 내포하고 있다. 국내의 경우, 지하철 승강장 제연설비는 전용설비로 구축되어 있지 않고 화재발생 시 승강장환기설비 및 본선터널부의 환기설비를 제연모드로 절환하여 운영되고 있다. 제연효과는 이러한 까닭으로 환기설비의 위치, 용량 및 급배기방식에 종속된다. 본 연구에서는 지하철 승강장에서 열차 화재 발생 시, 승객의 안전한 대피로 확보가 가능한 선로부 환기기의 제연운전 효과의 실효성에 대한 검증을 목표로 한다. 따라서 지하승강장을 대상으로 승강장 내 기류해석 및 3차원 화재시뮬레이션을 수행하여 열차화재에 따른 승강장내 열 및 물질이동특성해석으로부터 선로부 배연운전모드에 따른 특성을 규명함으로서 승객안전성 확보에 목표를 둔다. Today's popular ventilation systems include the combined jet fans and electrostatic precipitation systems or the combined jet fans and vertical shaft system. Tunnels with these two ventilation systems applied have been designed and opened, more and more interest has been put in maintenance of a tunnel after opening. Therefore. it is to become more important to come up with the optimal operation mode and the method for the evaluation of ventilation system. In this study, to evaluate a tunnel ventilation and its economy, a dynamic simulation program was developed which can simulate the unsteady-state tunnel air velocity and concentration of pollutants according to the traffic flow variations and operation condition of a ventilation system. We clarified the effectiveness usage on tunnel ventilation by using it and also we could found the most economical ventilation operation mode by application in real exit tunnel. We obtained that combination of fan system and electrostatic precipitation system was more economical than jet fan priority operation mode.

Effect of a Disinfection System with Iodinated Anion Exchange Resin in NFT System

Rie Ogai,Hideyuki Yamaguchi,Toru Maruo,Yoshimiki Amemiya,Yutaka Shinohara 한국원예학회 2006 한국원예학회 기타간행물 Vol.- No.-