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Recoil Momentum of Target Ions in Collisions of Ar^(6+)+CO_2 at Energies Below 300 eV/u

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Plasma Science and Technology 2010年第3期12卷 361-363页

作者： Y.INOUE K.ishii H.OGAWA Graduate school of Humanities and Sciences Nara Women's University Dept. of Physics Nara Women's University

The collision dynamics and fragmentation process of molecule by highly charged ion impact for single electron capture processes at the low energies below 1 keV/u were studied. The collision energy dependence of the recoil momentum was obtained experimentally and compared it with those calculated by a theoretical model using a deflection function with polarization potential. A fairly good agreement between the measured and calculated results was reached. This suggests that the polarization potential plays a crucial role in the low-energy region.

关键词： atomic process highly charged ion charge transfer classical over barrier model molecular fragmentation

Transcatheter arterial embolization for traumatic injury to the pharyngeal branch of the ascending pharyngeal artery:Two case reports

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World Journal of Clinical Cases 2022年第32期10卷 12015-12021页

作者： Daisuke Yunaiyama Yuki Takara Takehiro Kobayashi Mika Muraki Taro Tanaka Mitsuru Okubo Toru Saguchi Motoki Nakai Kazuhiro Saito Kiyoaki Tsukahara Yuri ishii Hiroshi Homma Department of Radiology Tokyo Medical University HospitalShinjuku-ku 160-0023Japan Department of Otorhinolaryngology Head and Neck SurgeryTokyo Medical University HospitalShinjuku-ku 160-0023Japan Department of Emergency and Critical Care Medicine Tokyo Medical University HospitalShinjuku-ku 160-0023Japan

BACKGROUND The ascending pharyngeal artery(APhA)comprises the pharyngeal trunk(PT)and neuromeningeal *** PT feeds the nasopharynx and adjacent tissue,which potentially connects with the sphenopalatine artery(SPA),branched from the internal maxillary artery(IMA).Due to its location deep inside the body,the PT is rarely injured by ***,we present two cases that underwent transcatheter arterial embolization(TAE)of the PT of the APhA due to trauma and iatrogenic *** SUMMARY Case 1 is a 49-year-old Japanese woman who underwent transoral endoscopy under sedation for a medical *** nasal airway was inserted as glossoptosis occurred during *** from the nasopharynx was observed during the endoscopic *** the bleeding continued,the patient was referred to our hospital for further ***-enhanced computed tomography(CT)demonstrated extravasation in the nasopharynx originating from the right Rosenmuller *** was performed and the extravasation disappeared after *** 2 is a 28-year-old Japanese woman who fell from the sixth floor of a building and was transported to our *** CT demonstrated a complex facial fracture accompanying extravasation in the left pterygopalatine fossa to the *** demonstrated an irregular third portion of the *** angiography after TAE of the IMA demonstrated extravasation from the PT of the APhA,additional TAE to the artery was *** bleeding stopped after the *** Radiologists should be aware that the PT of the APhA can be a bleeding source,which has a potential connection with the SPA.

关键词： Arteries Catheters Hemorrhage Injury Trauma Case report

Small extracellular vesicles and liver diseases:From diagnosis to therapy

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World Journal of Hepatology 2022年第7期14卷 1307-1318页

作者： Atsunori Tsuchiya Kazuki Natsui Yui ishii Yohei Koseki Nobutaka Takeda Kei Tomiyoshi Fusako Yamazaki Yuki Yoshida Shuji Terai Division of Gastroenterology and Hepatology Niigata University Medical and Dental HospitalNiigata 951-8510Japan Department of Gastroenterology and Hepatology Niigata UniversityNiigata 951-8510Japan

Extracellular vesicles(EVs),especially small EVs(sEVs)derived from liver cells,have been the focus of much attention in the normal physiology and pathogenesis of various diseases affecting the *** are approximately 100 nm in size,enclosed within lipid bilayers,and are very *** lipids,proteins,and nucleic acids,including miRNAs,contained within these vesicles are known to play important roles in intercellular *** mini-review summarizes the application of ***,liver diseases and the related diagnostic markers are described,and the current active status of miRNA research in diagnosis of hepatocellular carcinoma(HCC)is ***,the biodistribution and pharmacokinetics of sEVs are described,and the liver is highlighted as the organ with the highest accumulation of ***,the relationship between sEVs and the pathogenesis of liver disorders is described with emphesis on the current active status of miRNA research in HCC recurrence and ***,the possibility of future therapy using sEVs from mesenchymal stem(stromal)cells for cirrhosis and other diseases is described.

关键词： Small extracellular vesicles Liver cirrhosis Hepatocellular carcinoma Mesenchymal stem cells

Media Independent Handover Scheme with QoS Provision across UMTS and WiMAX Networks

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China Communications 2012年第7期9卷 55-70页

作者： Xu Yihan Chee-Onn Chow Khong-Neng Choong Hiroshi ishii Department of Electrical Engineering University of Malaya Lembah Pantai Kuala Lumpur 50603 Malaysia Wireless Communication Cluster MIMOS Berhad Technology Park Malaysia Kuala Lumpur 57000 Malaysia Professional Graduate School of Embedded Technology Tokai University Minato-ku Tokyo 108-8619 Japan

The rapid growth and innovation of the various mobile communication technologies have caused a change in the paradigm of internet access. Wireless technologies such as WiMAX, Wi-Fi and UMTS/LTE networks have shown great potential in dominating the wireless access markets. The existence of various access technologies requires a means for seamless internetworking to provide anywhere, anytime services without interruption in the ongoing session, especially in multimedia applications with rigid Quality of Services(QoS) requirements. The IEEE 802.21 Media Independent Handover (MIH) working group was formed to develop a set of mechanisms under a standard framework with the capability to support migration of mobile users across heterogeneous networks. Therefore, the implementation of handover is extremely important in the heterogeneous network environment. In order to guarantee various QoS requirements during handover execution especially in multimedia applications, in this paper we propose a novel MIH-based capacity estimation algorithm to execute handover with QoS provision supporting both horizontal and vertical handovers across UMTS and WiMAX networks. Simulation shows that the proposed mechanism achieves lower call dropping rate (highest approximate 3%) and higher system throughput (average 92%) than the basic handover method does.

关键词： UMTS 网络连接多媒体 WiMAX QoS 交接移动通信技术无线技术

Cooperative function of antioxidant and redox systems against oxidative stress in male reproductive tissues

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Asian Journal of Andrology 2003年第3期5卷 231-242页

作者： Junichi Fujii Yoshihito Iuchi Shingo Matsuki Tatsuya ishii Department of Biochemistry Yamagata University School of Medicine Yamagata 990 9585 JapanDepartment of Biochemistry Yamagata University School of Medicine Yamagata 990 9585 JapanDepartment of Biochemistry Yamagata University School of Medicine Yamagata 990 9585 JapanDepartment of Biochemistry Yamagata University School of Medicine Yamagata 990 9585 Japan

Reactive oxygen species (ROS) are produced under oxidative stress, such as high oxygen concentration and during the metabolic consumption of oxygen molecules. Male reproductive tissues appear to be continuously exposed to ROS produced by active metabolism. In addition, spermatozoa must pass through a high oxygen environment during the mating process. Thus, to maintain viable reproductive ability, a protective mechanism against oxidative stress is of importance. Here, we overview our current understanding of the cooperative function of antioxidative and redox systems that are involved in male fertility. Superoxide dismutase and glutathione peroxidase are major enzymes that scavenge harmful ROS in male reproductive organs. In turn, glutathione and thioredoxin systems constitute the main redox systems that repair oxidized and damaged molecules and also play a role in regulating a variety of cellular functions. While glutathione functions as an antioxidant by donating electrons to glutathione peroxidase and thioredoxin donates electrons to peroxiredoxin as a counterpart of glutathione peroxidase. In addition, aldo-keto reductases, which detoxify carbonyl compounds produced by oxidative stress, are present at high levels in the epithelia of the genital tract and Sertoli cells of the testis. Since these systems are involved in cross-talk, a comprehensive understanding will be required to maintain the physiological functions of male reproductive system.

关键词： reactive oxygen species superoxide dismutase glutathione thioredoxin peroxiredoxin aldo-keto reduc-tase

Foods Intakes and Their Influences on BMI (Body Mass Index) in Young and Middle Aged Women in Japan

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Food and Nutrition Sciences 2022年第4期13卷 349-357页

作者： Akikazu Takada Fumiko Shimizu Yukie ishii Mutsumi Ogawa Tetsuya Takao International Projects on Food and Health (NPO) Tokyo Japan Faculty of Human Life and Environmental Sciences Showa Women’s University Tokyo Japan

Background: Japanese women’s body mass index (BMI) was known to be the lowest among people in OECD countries. We wanted to compare foods intakes and relationships between intakes of particular food species and BMI. Methods: We asked young and middle-aged women to participate and used a brief-type self-administered diet history questionnaire (BDHQ) to know the amounts of various food species they took. Results: Weights and BMI of young and middle-aged women were not different. Middle-aged women took almost all species of foods and energy more than young women. Except for cholesterol of soluble dietary fibers, there was no correlation between foods intakes and BMI. Conclusion: Both young and middle-aged Japanese women are lean (BMI;around 22). Middle-aged women took more energy, and proteins, carbohydrates, and lipids compared with young women. Middle-aged women spend more energy on house workings than young women in Japan.

关键词： Body Mass Index BDHQ Protein Carbohydrate Lipid Cardiovascular Disease Diabetes Mellitus Obesity Overweight

Uniqueness of Tryptophan in the Transport System in the Brain and Peripheral Tissues

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Food and Nutrition Sciences 2023年第5期14卷 401-414页

作者： Mutsumi Ogawa Fumiko Shimizu Yukie ishii Tetsuya Takao Akikazu Takada Faculty of Food and Health Sciences Showa Women’s University Tokyo Japan International Projects on Food and Health (NPO) Tokyo Japan

Amino acids are important substances that must be transported to tissues such as the brain and muscles. The process is considered insulin dependent. It is not known whether all the amino acids are almost equally dependent in their transportation to tissues. We want to know whether some important amino acids are transported differently from other amino acids. Especially tryptophan is important because it is converted to serotonin, melatonin or kynurenine. Results showed that Amino acids levels in the plasma were measured after the intakes of 50 grams of glucose or sucrose to young (18 - 22 years old) and old (≥50 years old) men. Total amino acids in the plasma decreased after the intakes of glucose. Total amino acids levels decreased more significantly in old men after the administration of sucrose. Total and non-essential amino acids in the plasma decreased significantly at 120 min after the intakes of glucose in young and old men, but only sucrose caused their decreases in both aged and young men. Both glucose and sucrose intakes decreased significantly the plasma levels of the total essential and branched amino acids in young and old men. Surprisingly, plasma levels of tryptophan did not decrease upon the administration of glucose but only slightly decreased upon the administration of sucrose in young men. In conclusion, not all the amino acids were transported well into tissues upon the administration of glucose or sucrose. Tryptophan seems to be relatively resistant for insulin to facilitate the transportation into tissues.

关键词： Glucose Sucrose Insulin Amino Acids Transporter mTORC1

An enhanced framework for providing multimedia broadcast/multicast service over heterogeneous networks

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Journal of Zhejiang University-Science C(Computers and Electronics) 2014年第1期15卷 63-80页

作者： Yi-han XU Chee-Onn CHOW Mau-Luen THAM Hiroshi ishii Department of Electrical Engineering University of Malaya Professional Graduate School of Embedded Technology Tokai University

Multimedia broadcast multicast service(MBMS)with inherently low requirement for network resources has been proposed as a candidate solution for using such resources in a more efficient *** the other hand,the Next Generation Mobile Network(NGMN)combines multiple radio access technologies(RATs)to optimize overall network *** performance is becoming a vital indicator of the quality experience of mobile user equipment(UE).In contrast to the conventional vertical handover issue,the problem we are facing is how to seamlessly transmit broadcast/multicast sessions among heterogeneous *** this paper,we propose a new network entity,media independent broadcast multicast service center(MIBM-SC),to provide seamless handover for broadcast/multicast sessions over heterogeneous networks,by extensions and enhancements of MBMS and media independent information service(MIIS)***,a network selection scheme and a cell transmission mode selection scheme are proposed for selecting the best target network and best transmission *** schemes are based on a load-aware network capacity estimation *** results show that the proposed approach has the capability to provide MBMS over heterogeneous networks,with improved handover performance in terms of packet loss rate,throughput,handover delay,cell load,bandwidth usage,and the peak signal-to-noise ratio(PSNR).

关键词： IEEE 802.21 MIBM-SC MBMS MIIS Heterogeneous networks Network resource management

Prevalence of linked angina and gastroesophageal reflux disease in general practice

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World Journal of Gastroenterology 2009年第14期15卷 1764-1768页

作者： Hirohito Kato Takamasa ishii Tatsuo Akimoto Yoshihisa Urita Motonobu Sugimoto Department of General Medicine and Emergency Care Toho University School of Medicine Omori Hospital 6-11-1 Omori-Nishi Ota-Ku Tokyo 143-8541 Japan

AIM: To evaluate the association between gastroesophageal re? ux diseases (GERD) and coronary heart diseases. METHODS: One thousand nine hundred and seventy consecutive patients who attended our hospital were enrolled. All of the patients who first attend our hospital were asked to respond to the F-scale questionnaire regardless of their chief complaints. All patients had a careful history taken, and resting echocardiography (ECG) was performed by physicians if the diagnostic necessity arose. Patients with ECG signs of coronary artery ischemia were defined as STsegment depression based on the Minnesota code. RESULTS: Among 712 patients (36%) with GERD, ECG was performed in 171 (24%), and ischemic changes were detected in eight (5%). Four (50%) of these patients with abnormal findings upon ECG had no chest symptoms such as chest pain, chest oppression, or palpitations. These patients (0.6%; 4/712) were thought to have non-GERD heartburn, which may be related to ischemic heart disease. Of 281 patients who underwent ECG and did not have GERD symptoms, 20 (7%) had abnormal findings upon ECG. In patients with GERD symptoms and ECG signs of coronary artery ischemia, the prevalence of linked angina was considered to be 0.4% (8/1970 patients).CONCLUSION: The present study suggested that ischemic heart disease might be found although a patient was referred to the hospital with a complaint of GERD symptoms. Physicians have to be concerned about missing clinically important coronary artery disease while evaluating patients for GERD symptoms.

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