检索结果-南通市图书馆

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

选用数字磁带录象机格式的几点考虑

电视技术 1985年第4期 43-49页

作者： hirofumi yoshida Takeo Eguchi 谢永贤

目前,在数字视频记录的编码标准方面已取得了一致意见。本文定性分析与选用数字高密度磁性记录方式有关的各种选择和相互间的关系。这些包括:影响磁带损耗的几种因素,限制磁带格式的各因素间的相互关系,以及可能的几种格式。本文也讨论... 详细信息

目前,在数字视频记录的编码标准方面已取得了一致意见。本文定性分析与选用数字高密度磁性记录方式有关的各种选择和相互间的关系。这些包括:影响磁带损耗的几种因素,限制磁带格式的各因素间的相互关系,以及可能的几种格式。本文也讨论了方位记录方式,文中指出,在发展中的模拟VTR仍存在实质性的改进,使得对于选用实用的数字VTR格式应给与更周密的考虑。

关键词：磁迹磁头数据读出磁记录器磁带格式信噪比信杂比磁带录象机差拍干扰写入方式记录方式兆比特/秒短波长

Different micro/nano-scale patterns of surface materials influence osteoclastogenesis and actin structure

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2022年第5期15卷 4201-4211页

作者： Tsukasa Akasaka Miho Tamai Yoshitaka Yoshimura Natsumi Ushijima Shinichiro Numamoto Atsuro Yokoyama hirofumi Miyaji Ryo Takata Shuichi Yamagata Yoshiaki Sato Ko Nakanishi Yasuhiro yoshida Department of Biomaterials and Bioengineering Faculty of Dental MedicineHokkaido UniversitySapporo 060-8586Japan Immune Signal Unit Okinawa Institute of Science and Technology Graduate UniversityOkinawa 904-0495Japan Department of Pharmacology Faculty of Dental Medicine and Graduate School of Dental MedicineHokkaido UniversitySapporo 060-8586Japan Support Section for Education and Research Faculty of Dental MedicineHokkaido UniversitySapporo 060-8586Japan Oral Functional Prosthodontics Division of Oral Functional ScienceFaculty of Dental MedicineHokkaido UniversitySapporo 060-8586Japan Department of Periodontology and Endodontology Faculty of Dental MedicineHokkaido UniversitySapporo 060-8586Japan Department of Orthodontics Faculty of Dental Medicine and Graduate School of Dental MedicineHokkaido UniversitySapporo 060-8586Japan

The surface topography of a material can influence osteoclast ***,the surface structural factors that promote osteoclast activity have not yet been investigated in ***,we investigated osteoclastogenesis by testing various defined patterns with different dimensions and *** systematic patterns,made of a cyclo-olefin polymer,were prepared at a micron-,submicron-,and nano-scale with a groove,hole,or pillar shape with a 1:1 pitch ***264.7 cells were cultured on these patterns in the presence of the receptor activator of NF-κB ligand(RANKL).Osteoclast formation was induced in the order:pillar>groove≥*** two-dimensional factors also indicated that submicron-sized patterns strongly induced osteoclast *** optimal pillar dimension for osteoclast formation was 500 nm in diameter and 2μm in ***,we observed two types of characteristic actin structure,i.e.,belt-like structures with small hollow circles and isolated ring-like structures,which formed on or around the pillars depending on size and ***,resorption pits were observed mainly on the top of calcium phosphate-coated ***,osteoclasts prefer convex shapes,such as pillars for differentiation and *** results indicate that osteoclastogenesis can be controlled by designing surfaces with specific morphologies.

关键词： micro/nano-pattern pillar RAW264.7 osteoclast actin structure resorption pit

Brown slits for colorectal adenoma crypts on conventional magnifying endoscopy with narrow band imaging using the X1 system

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2022年第24期28卷 2748-2757页

作者： Osamu Toyoshima Toshihiro Nishizawa Shuntaro yoshida Hidenobu Watanabe Nariaki Odawara Kosuke Sakitani Toru Arano Hirotoshi Takiyama Hideyuki Kobayashi hirofumi Kogure Mitsuhiro Fujishiro Department of Gastroenterology Toyoshima Endoscopy ClinicTokyo 157-0066Japan Department of Gastroenterology and Hepatology International University of Health and WelfareNarita HospitalChiba 286-8520Japan Department of Pathology Pathology and Cytology Laboratory JapanTokyo 166-0003Japan Department of Gastroenterology Graduate School of MedicineThe University of TokyoTokyo 113-8655Japan Department of Gastroenterology Sakitani Endoscopy ClinicChiba 275-0026Japan Department of Gastroenterology The Fraternity Memorial HospitalTokyo 130-8587Japan Department of Surgical Oncology The University of TokyoTokyo 113-8655Japan Department of Internal Medicine Umegaoka Ekimae ClinicTokyo 154-0022Japan

BACKGROUND Accurate diagnosis of colorectal premalignant polyps,including adenomas,is vital in clinical *** To investigate the diagnostic yields of novel findings of brown slits for *** Patients who underwent colonoscopy at the Toyoshima Endoscopy Clinic were *** sized≥5 mm suspected of adenomas or clinically significant serrated polyps were included in the *** defined the surface structures of colorectal polyps,which were brown curves inside and along the tubular glands identified using a combination of a new X1 system(Olympus Corporation)and a conventional magnifying colonoscope with non-staining narrow band imaging(NBI),as brown *** brown slits corresponded to slit-like lumens on endocytoscopy and histological crypt openings of an *** evaluated the diagnostic performance of brown slits for *** A total of 108 Lesions from 62 patients were *** average age was 60.4 years and 41.9%were *** mean polyp size was 7.45±2.83 ***-seven lesions were positive for brown *** diagnosis comprised 59 low-grade tubular adenomas,16 sessile serrated lesions,and 33 hyperplastic *** 59 adenomas,56(94.9%)were positive for brown *** 16 sessile serrated lesions,0(0%)was positive for brown *** 33 hyperplastic polyps,1(3.0%)was positive for brown *** sensitivity,specificity,and accuracy of brown slits for adenoma were 94.9%,98.0%,and 96.3%,*** positive predictive value and negative predictive value of brown slits for adenoma were also excellent for 98.2%,and 94.1%,*** Brown slits on conventional magnifying endoscopy with non-staining NBI using the X1 system were useful for diagnosing colorectal *** new endoscopy system could be examined using new standards.

关键词： Adenoma Colonoscopy Narrow band imaging Magnifying endoscopy X1 Serrated polyp Colorectal neoplasm Endocytoscopy

Proposal for a new evaluation of phagocytosis using different sizes of fluorescent polystyrene microspheres

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Biological Chemistry 2013年第6期3卷 556-563页

作者： Riyo Enomoto Makoto Imamori Ayoumi Seon Kozue yoshida Aya Furue hirofumi Tsuruda Eibai Lee-Hiraiwa Laboratory of Pharmacology Faculty of Pharmaceutical Sciences Kobe Gakuin University Kobe Japan Laboratory of Pharmacology Faculty of Pharmaceutical Sciences Kobe Gakuin University Kobe Japan 2Cooperative Research Center of Life Sciences Kobe Gakuin University Kobe Japan Laboratory of Pharmacology Faculty of Pharmaceutical Sciences Kobe Gakuin University Kobe Japan 2Cooperative Research Center of Life Sciences Kobe Gakuin University Kobe Japan Cooperative Research Center of Life Sciences Kobe Gakuin University Kobe Japan Laboratory of Pharmacology Faculty of Pharmaceutical Sciences Kobe Gakuin University Kobe Japan Cooperative Research Center of Life Sciences Kobe Gakuin University Kobe Japan 2Cooperative Research Center of Life Sciences Kobe Gakuin University Kobe Japan

To investigate phagocytosis, peritoneal-resident and J774.1 macrophages were incubated with fluorescent polystyrene microspheres measuring 1.0 μm in diamter at 200 particles per cell. The amount of phagocytized microspheres increased with incubation time, and both cell types had similar phagocytic activity. Further, we investigated the phagocytosis of different sizes of microspheres by J774.1 macrophages. To adequately evaluate phagocytosis, varying amounts of different sizes of microspheres were added to J774.1 cells, and their phagocytic activities were evaluated. When the microspheres were added at a density of 20 particles per cell, few small microspheres (3 μm in diameter) could not be evaluated because of cytotoxicity. Thus, the amount of different sizes of microspheres added is important for precisely evaluating phagocytic activity. When the amount of different sizes of microspheres added was standardized to provide a set amount of total surface area, phagocytosis of these microspheres could be adequately evaluated and compared. To determine the effects of phagocytosis on cell viability and proliferation, cells incubated with different sizes of microspheres were assayed using a cell counting kit. We found that phagocytosis had no effect on cell viability or proliferation and was independent of particle size. Furthermore, cells already phagocytized microspheres retained their phagocytic activity.

关键词： Macrophage Phagocytosis Polystyrene Microsphere Total Surface Area

Erratum to: Different micro/nano-scale patterns of surface materials influence osteoclastogenesis and actin structure

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2022年第5期15卷 4773-4773页

The article“Different micro/nano-scale patterns of surface materials influence osteoclastogenesis and actin structure”,written by Tsukasa Akasaka,Miho Tamai,Yoshitaka Yoshimura,Natsumi Ushijima,Shinichiro Numamoto,Atsuro Yokoyama,hirofumi Miyaji,Ryo Takata,Shuichi Yamagata,Yoshiaki Sato,Ko Nakanishi,and Yasuhiro yoshida,was originally published electronically on the publisher’s internet portal on January 17,2022 without open access.

关键词： internet portal Nat