Joji Inamasu, Yoshiki Nakamura, Ryoichi Saito, Y. Kuroshima, Keita Mayanagi, Kiyoshi Ichikizaki, Satoshi Onozuka, Sadao Suga, Takeshi Kawase,
... this author on: This Site PubMed Google Scholar Yoshiki Nakamura; Yoshiki Nakamura aDepartment of Neurosurgery, National Tokyo Medical Center and ... Cite Icon Cite Search Site Citation Joji Inamasu, Yoshiki Nakamura, Ryoichi Saito, Yoshiaki Kuroshima, Keita Mayanagi, Kiyoshi Ichikizaki, ...
Tópico(s): Moyamoya disease diagnosis and treatment
2003 - Karger Publishers | Cerebrovascular Diseases
Hiroaki Takeda, Yoshiki Nakamura, Hideho Handa, Hiroaki Ishii, Yoshiki Hamada, Kanich Seto,
We examined the movement of the mandible in skeletal Class III patients with a unilateral posterior cross-bite to clarify whether the correction of the cross-bite caused conversion of the masticatory movement from a reverse to a grinding pattern.We studied 10 adults with mandibular prognathism who had been treated with surgery. The masticatory movement and rhythm (cycle time) during gum chewing were recorded before and after treatment.The results before treatment demonstrated a high frequency of ...
Tópico(s): dental development and anomalies
2009 - Elsevier BV | Journal of Oral and Maxillofacial Surgery
Yoshiki Nakamura, Takayoshi Higuchi,
Tópico(s): Lignin and Wood Chemistry
1976 - De Gruyter | Holzforschung
Yoshiki Nakamura, H. Fushiki, Takayoshi Higuchi,
Sliced xylem tissue from shoots of both poplar and cherry reduces ferulic and sinapic acids to the corresponding aldehydes and alcohols, while tissue from gymnosperms such as Japanese red pine and ginkgo can reduce only ferulic acid. In young, less differentiated, xylem tissue and callus tissue of angiosperms the ability to reduce sinapic acid is markedly lower than that of the fully differentiated xylem. Both gymnosperm and angiosperm tissues reduced coniferyl and sinapyl aldehydes to the corresponding ...
Tópico(s): Plant Gene Expression Analysis
1974 - Elsevier BV | Phytochemistry
Sachio Ohno, Kiyoshi Mizukoshi, Osamu Komatsu, Yasuo Kunoh, Yoshiki Nakamura, EIICHI KATOH, Mitsuaki Nagasaka,
A series of 2-amino-7, 8-dihydro-4-piperazinyl- and 4-amino-7, 8-dihydro-2-piperazinyl-6H-thiopyrano[3, 2-d]pyrimidines and related compounds were synthesized and evaluated for hypoglycemic activity. Several compounds exhibited excellent activity, and 7, 8-dihydro-2-(4-methyl-piperazinyl)-4-(1-pyrrolidinyl)- (8c, dimaleate : MTP-1307) and 2-amino-7, 8-dihydro-4-piperazinyl-6H-thiopyrano[3, 2-d]pyrimidine (18a, dimaleate : MTP-1403) were selected for further investigation.Oral administration of 8c and ...
Tópico(s): Multicomponent Synthesis of Heterocycles
1986 - Pharmaceutical Society of Japan | Chemical and Pharmaceutical Bulletin
Sachio Ohno, Osamu Komatsu, Kiyoshi Mizukoshi, Kenji Ichihara, Yoshiki Nakamura, Takashi Morishima, K. SUMITA,
Asymmetric 4-aryl-1, 4-dihydro-2, 6-dimethyl-3, 5-pyridinedicarboxylates with a 2-ethylenedioxypropyl, 2-oxopropyl, or cyclopropylmethyl group as the ester moiety and related derivatives were synthesized and tested for vasodilating activity in anesthetized open-chest dogs and for antihypertensive activity in conscious spontaneously hypertensive rats. Cyclopropylmethyl methyl 1, 4-dihydro-2, 6-dimethyl-4-(3-nitrophenyl)-3, 5-pyridinedicarboxylate (5f, MPC-2101) and methyl 2-oxopropyl 1, 4-dihydro- ...
Tópico(s): Synthesis and Reactivity of Heterocycles
1986 - Pharmaceutical Society of Japan | Chemical and Pharmaceutical Bulletin
A mathematical modeling and simulation of friction during steady state sliding of metals, based on the upper-bound approach, is demonstrated. The existence of wedge-shaped protrusions on the tool surface is assumed. Pressing these protrusions onto the workpiece and sliding the tool along the workpiece produces asperities on the surface of the workpiece. These asperities move in a wave-like motion along the surface layer and cause plastic deformation through a specified depth under the surface. This ...
Tópico(s): Mechanical Systems and Engineering
1986 - Elsevier BV | Wear
Takayuki Ohira, Shigeo Toya, M. Takase, Yoshiki Nakamura, Hiromichi Miyazaki, Masashi Nakatsukasa, Yukio IBATA,
Brainstem auditory evoked potentials (BAEPs) were monitored intraoperatively during 44 posterior fossa operations. Technically satisfactory recordings were obtained from 42 patients (95%) and, in 41 of these cases (98%), the intraoperative changes in BAEPs were correlated with the postoperative neurological findings. The functional integrity of the brainstem was assessed by intraoperative BAEP monitoring in 33 patients. Transient, reversible changes were observed in six (18%), and none had postoperative ...
Tópico(s): Vascular Malformations Diagnosis and Treatment
1988 - Japan Neurological Society | Neurologia medico-chirurgica
Yoko Yamashita, Yoshiki Nakamura, Tatsuo Shimada, Yoshiaki Nomura, Ayao Hirashita,
The purpose of this study was to examine asymmetry of the lips in patients with jaw deformity and facial asymmetry.Pretreatment and posttreatment frontal facial photographs of 17 patients who had mandibular prognathism with facial asymmetry were analyzed. Linear and angular measurements were made on the photographs to assess the asymmetry of the lips. The upper and lower vermilion borders of the lips were divided into quadrants according to the y-axis, and each was measured. In addition, skeletal ...
Tópico(s): dental development and anomalies
2009 - Elsevier BV | American Journal of Orthodontics and Dentofacial Orthopedics
Joji Inamasu, Yoshiki Nakamura, Ryoichi Saito, Y. Kuroshima, Kiyoshi Ichikizaki,
Pneumorrachis (PR) is characterized by the presence of air within the spinal canal. It can be classified descriptively into internal or intradural and external or epidural. The causes of PR can be divided as iatrogenic, nontraumatic and traumatic.In the present study, a comprehensive literature search was conducted to identify all previous cases of PR after an isolate head injury. Two additional cases were also reported. We concluded, that PR after isolated head injuries is a rare but likely an underdiagnosed ...
Tópico(s): Restraint-Related Deaths
2002 - Elsevier BV | The American Journal of Emergency Medicine
Joji Inamasu, Yoshiki Nakamura, Ryoichi Saito, Y. Kuroshima, Shigeo Ohba, Kiyoshi Ichikizaki,
A 69-year-old man underwent successful endovascular treatment of a posterior communicating artery aneurysm that had caused a third nerve palsy. Pupil size became normal within 10 days and ptosis and ocular ductions became normal within 3 weeks of the procedure. Based on the reported recovery rates of third nerve palsy after aneurysmal clipping, recovery may occur more rapidly in patients who undergo endovascular treatment. Further data are necessary to substantiate this hypothesis.
Tópico(s): Pituitary Gland Disorders and Treatments
2002 - Lippincott Williams & Wilkins | Journal of Neuro-Ophthalmology
Joji Inamasu, Yoshiki Nakamura, Ryoichi Saito, Y. Kuroshima, Keita Mayanagi, Shigeo Ohba, Kiyoshi Ichikizaki,
Severe metabolic acidosis develops following prolonged periods of cardiopulmonary arrest (CPA), and excessive hydrogen ions derived from lactate and other noxious acids cause marked hyperkalemia in most CPA patients. This study investigated whether the serum electrolyte imbalance in resuscitated CPA patients is affected by the etiology of the CPA. Between 1999 and 2000, return of spontaneous circulation (ROSC) was achieved and serum electrolyte concentration measurements and blood gas analysis (BGA) ...
Tópico(s): Intensive Care Unit Cognitive Disorders
2002 - Elsevier BV | Resuscitation
Joji Inamasu, Yoshiki Nakamura, Ryoichi Saito, Y. Kuroshima, Keita Mayanagi, Kiyoshi Ichikizaki,
Abstract OBJECTIVE Patients with poor-grade subarachnoid hemorrhage (SAH) have been considered good candidates for endovascular treatment. The results of treatment of Grade V SAH, the poorest grade, however, have not been fully elucidated. METHODS The clinical characteristics and outcome parameters of 22 World Federation of Neurosurgical Societies Grade V SAH patients treated endovascularly in the acute stage between 1998 and 2000 are summarized and compared with those of 18 Grade V SAH patients ...
Tópico(s): Cerebrospinal fluid and hydrocephalus
2002 - Lippincott Williams & Wilkins | Neurosurgery
Joji Inamasu, Yoshiki Nakamura, Ryoichi Saito, Y. Kuroshima, Keita Mayanagi, Shigeo Ohba, Kiyoshi Ichikizaki,
Spinal subdural hematoma (SSDH) is a rare disease of the spine. Cases that occur spontaneously in the absence of an identifiable etiology are considerably less common, concomitant spontaneous SSDH with intracranial subarachnoid hemorrhage (SAH) is even rarer.We present the unusual case of a 58-year-old woman developing spontaneous SSDH concomitant with idiopathic intracranial SAH. Our patient presented with severe sudden back pain followed by moderate headache, with rapid onset of thoracic radicular ...
Tópico(s): Spinal Fractures and Fixation Techniques
2002 - Elsevier BV | The American Journal of Emergency Medicine
Joji Inamasu, Ryoichi Saito, Yoshiki Nakamura, Kiyoshi Ichikizaki, Sadao Suga, Takeshi Kawase, Shingo Hori, Naoki Aikawa,
On rare occasions, rupture of a cerebral aneurysm causes acute subdural hematoma (SDH) in addition to subarachnoid hemorrhage (SAH). The frequency of SDH resulting from aneurysmal rupture is summarized, and its clinical and radiological characteristics, as well as potential pitfalls in the diagnosis and the management of this life-threatening condition are described. Among 641 patients with nontraumatic SAH treated between 1992 and 2000, 12 patients (1.9%) presented with SDH due to aneurysmal rupture. ...
Tópico(s): Cerebrospinal fluid and hydrocephalus
2002 - Elsevier BV | Resuscitation
Tópico(s): Impact of Light on Environment and Health
2002 - | JOURNAL OF THE ILLUMINATING ENGINEERING INSTITUTE OF JAPAN
Joji Inamasu, Hiroshi KAGAMI, Yoshiki Nakamura, Ryoichi Saito, Maki Niimi, Kiyoshi Ichikizaki,
Tópico(s): Bacterial Infections and Vaccines
2002 - Springer Science+Business Media | Journal of Neurology
Yoshiki Nakamura, Naoki Sasaki, Mitsuo Nakata,
To study a chain aggregation process, dilute solutions of poly(methyl methacrylate) in the mixed solvent tert-butyl alcohol + water (2.5 vol %) with the molecular weight m = 1.57 × 106 were quenched to below the phase-separation temperature and scattered intensities were measured. The light-scattering measurement was carried out in the concentration range from 1.5 × 10-4 to 5.6 × 10-4 g/cm3 for a time period of several hours. By using the Guinier plot, the weight-average molecular weight 〈M〉w and z-average square ...
Tópico(s): Photochemistry and Electron Transfer Studies
2002 - American Chemical Society | Macromolecules
Joji Inamasu, Yoshiki Nakamura, Ryoichi Saito, Y. Kuroshima, Keita Mayanagi, Maaya Orii, Kiyoshi Ichikizaki,
Postoperative communicating hydrocephalus in adult patients with supratentorial malignant glioma is a relatively uncommon condition that occurs months after the initial operation of tumor excision. It occurred in only five of 50 consecutive cases treated in our department during the past 10 years. The hydrocephalus appeared to be attributable to leptomeningeal dissemination of tumor cells and subsequent impairment in cerebrospinal fluid (CSF) absorption. The tumors were located adjacent to the lateral ...
Tópico(s): Head and Neck Surgical Oncology
2003 - Elsevier BV | Clinical Neurology and Neurosurgery
Tomoaki Shikakura, Hiroyuki Morikawa, Yoshiki Nakamura,
The non-periodic fluctuation of artificial lighting in offices was investigated to clarify the threshold at which the fluctuation is perceived. The experiments showed that fluctuation ratio of 0.92-1.06, i.e. 7% of the fluctuation, is not perceived when the observers tried to be conscious of the fluctuation. On the other hand, under the condition of being unconscious of the fluctuation because of assigned visual tasks, the threshold has a broader range (0.8-1.3) and the value rises with the fluctuation ...
Tópico(s): Building Energy and Comfort Optimization
2003 - | Journal of Light & Visual Environment
Joji Inamasu, Takayuki Ohira, Yoshiki Nakamura, Ryuta Saito, Y. Kuroshima, Keita Mayanagi, Shigeo Ohba, Kiyoshi Ichikizaki,
Introduction – Intracranial arachnoid cysts are developmental, anomalous collections of cerebrospinal fluid (CSF), and occasionally cause symptoms when large enough to obliterate the CSF outflow pathway and give rise to non-communicating hydrocephalus. The treatment of choice for symptomatic arachnoid cysts has been surgical excision or fenestration of the cyst, but less invasive endoscopic fenestration has been attempted with favorable preliminary results. Case report – We report a case of non-communicating ...
Tópico(s): Spinal Dysraphism and Malformations
2003 - Wiley | Acta Neurologica Scandinavica
Joji Inamasu, Yoshiki Nakamura, Kiyoshi Ichikizaki,
The use of induced hypothermia in the treatment of traumatic spinal cord injury (SCI) has been studied extensively between the 1960s and 1970s. Although the treatment showed some promise, it became less popular by the 1980s, mainly because of its adverse effects. However, a revival of hypothermia in the treatment of traumatic brain injury (TBI) in the last decade has encouraged neuroscientists to conduct experiments to reevaluate the potential benefits of hypothermia in traumatic SCI. All laboratory ...
Tópico(s): Thermal Regulation in Medicine
2003 - Elsevier BV | Journal of the Neurological Sciences
Joji Inamasu, Yoshiki Nakamura, Ryoichi Saito, Takashi Horiguchi, Y. Kuroshima, Keita Mayanagi, Maaya Orii, Kiyoshi Ichikizaki,
Not infrequently, cerebral angiography performed immediately after the onset of subarachnoid hemorrhage (SAH) fails to reveal any causative lesion. Although the cause of the SAH in most of these cases remains unknown, repeat angiography sometimes discloses a lesion not detected by the initial angiography. The frequency of finding a ruptured aneurysm by repeat angiography and the angiographic characteristics of such aneurysms have been investigated retrospectively. Nineteen among 316 non-traumatic ...
Tópico(s): Vascular Malformations Diagnosis and Treatment
2003 - Elsevier BV | Clinical Neurology and Neurosurgery
Yoshiki Nakamura, Takashi TANAKA, K. Noda, S. Shimpo, Takashi Oikawa, Ayao Hirashita, Tadafumi Kawamoto, Kenzo Kawasaki,
Objective: Calcification of degenerating tissues in the periodontal ligament (PDL) during tooth movement was investigated longitudinally. Materials and methods: Upper first molars of male Wistar rats were moved lingually for 1, 7 and 21 d, following which unfixed undecalcified sections of the lingual PDL (in the pressure zone) were examined histologically, histochemically (autoradiography and electron probe microanalysis). Results: On d 1 of tooth movement, degenerating tissues, together with some ...
Tópico(s): Bone health and treatments
2003 - Wiley | Journal of Periodontal Research
Seiko Katsumura, Fusao Nishikawara, Yoh Tamaki, Hidenori Yamada, Yoshiki Nakamura, Keita Sato, Shinpei Tsuge, Yoshiaki Nomura, Nobuhiro Hanada,
The aim of this study is to evaluate the risk factors for dental caries in young children in Japan. We studied 645 children attending 13 of 30 elementary schools in two areas in Japan. Total salivary level of mutans streptococci and lactobacilli were evaluated at pre-school medical check-ups. Other factors we evaluated included use of fluoride containing dentifrices, administration of fluoride varnish in a private dental office, having regular check-ups, use of mouthwash with fluoride, and daily ...
Tópico(s): Dental Erosion and Treatment
2008 - Elsevier BV | Pediatric Dental Journal
K. Noda, Yoshiki Nakamura, Kentaro Kogure, Yoshiaki Nomura,
The aim of this study was to statistically assess the morphological changes of the rat periodontal ligament (PDL) and its vascularity in relation to varied magnitudes of superelastic force in experimental tooth movement using nickel–titanium (NiTi) alloy wire. Forces of 0.8, 1.6, 4, 8, and 18 g were applied to the upper first molars of five groups of 10-week-old male Wistar rats (300–320 g) for 1, 7, 14, 21, and 28 days. A control group with no orthodontic appliance application was assessed in accordance ...
Tópico(s): Dental Implant Techniques and Outcomes
2008 - Oxford University Press | European Journal of Orthodontics
Shunsuke Baba, Noriyuki Kuroda, Chihiro Arai, Yoshiki Nakamura, Tetsuji Sato,
The aim of the present study is to investigate the involvement of immunocompetent cells, pro-inflammatory cytokines and HSP, to evaluate a change of periodontal ligament during the initial stage of orthodontic tooth movement.In the present study, we investigated the distributional density of immunocompetent cells, the localisation of cytokines, and the expression levels of their mRNA in the periodontal ligament during the initial stage of orthodontic tooth movement, using immunohistochemistry and ...
Tópico(s): Antimicrobial Peptides and Activities
2010 - Elsevier BV | Archives of Oral Biology
Chihiro Arai, Yoshiaki Nomura, Misao Ishikawa, K. Noda, Jae-Won Choi, Yuichi Yashiro, Nobuhiro Hanada, Yoshiki Nakamura,
Tópico(s): Tendon Structure and Treatment
2010 - Springer Science+Business Media | Histochemistry and Cell Biology
Toshiko Sekiya, Yoshiki Nakamura, Takashi Oikawa, Hiroaki Ishii, Ayao Hirashita, Kanichi SETO,
This case report describes the importance of eliminating transverse dental compensation during preoperative orthodontic treatment for a patient with severe facial asymmetry. The patient, a 17-year-old Japanese woman, had severe facial asymmetry involving the maxilla and the mandible, and extreme transverse dental compensation of the anterior and posterior teeth in both arches. Therefore, the main treatment objectives were elimination of the transverse dental compensation by orthodontic treatment ...
Tópico(s): dental development and anomalies
2010 - Elsevier BV | American Journal of Orthodontics and Dentofacial Orthopedics
Jae-Won Choi, Chihiro Arai, Makiko Ishikawa, Shinji Shimoda, Yoshiki Nakamura,
Choi JW, Arai C, Ishikawa M, Shimoda S, Nakamura Y. Fiber system degradation, and periostin and connective tissue growth factor level reduction, in the periodontal ligament of teeth in the absence of masticatory load. J Periodont Res 2011; 46: 513–521.© 2011 John Wiley & Sons A/S Background and Objective: The periodontal ligament (PDL), which is interposed between the alveolar bone and roots, supports teeth against mechanical stress. Periostin and connective tissue growth factor (CTGF) might play essential ...
Tópico(s): Connective Tissue Growth Factor Research
2011 - Wiley | Journal of Periodontal Research