Nagasaki University's Academic Output SITE: NAOSITE
Not a member yet
31576 research outputs found
Sort by
「正しく整った文字」を書くことの発達と1年後の学力は関連するか―2種類の漢字採点基準における漢字書字成績と学力の関係についての縦断的検討―
Get PDF長崎大学教育学部紀要：人文科学 通巻 第91号 (Bulletin of Faculty of Education Nagasaki University: Humanities, Vol.91)長崎大学教育学部紀要, 11, pp.111-119; 2025departmental bulletin pape
楽曲分析に関する一考察－モティーフ操作の分析を通して－
Get PDF長崎大学教育学部紀要：人文科学 通巻 第91号 (Bulletin of Faculty of Education Nagasaki University: Humanities, Vol.91)長崎大学教育学部紀要, 11, pp.141-150; 2025departmental bulletin pape
Regional differences in intra-body distribution of saxitoxins in freshwater pufferfish Pao sp. A from Cambodia
Get PDFThe Mekong River in Cambodia is inhabited by approximately ten species of freshwater pufferfish of the family Tetraodontidae. However, limited information is available regarding the toxin profile of these fish. In this study, to obtain sufficient information on the intra-body distribution of toxins in Cambodian freshwater pufferfish, one species of Pao freshwater pufferfish (Pao sp. A) were collected from Phnom Penh (PNH) in November 2019 (n = 23) and from Kratie (KTI) in March 2023 (n = 21). Toxin analyses of these samples revealed that individuals from both regions possessed saxitoxins (STXs) and contained no tetrodotoxin. Pao sp. A specimens from PNH possessed high STXs levels in the skin, muscle, liver, and gonads, whereas those from KTI showed relatively low levels of STXs concentrated in the skin. STXs amount in the ovaries in PNH individuals increased exponentially with increasing the gonadosomatic index (GSI). We also clarified that STXs concentration in the skin became increasingly higher as KTI individuals grew. These results suggest that differences in living regions may affect the intra-body distribution of STXs in Pao freshwater pufferfish, with maturation and/or growth contributing as well.Toxicon, 259, art. no. 108363; 2025journal articl
Self-directed and prosocial wound care, snare removal, and hygiene behaviors amongst the Budongo chimpanzees
Get PDFUnderstanding the cognitive and social foundations of healthcare behaviors in humans requires examining their evolutionary precursors in our closest living relatives. Investigating self-directed and other-directed healthcare in chimpanzees provides crucial insights into the origins of medicinal knowledge, identification of specific medicinal resources used for health maintenance, and the emergence of prosocial healthcare capacities. Here we document and analyze both previously reported and newly observed instances of self-directed and other-directed wound care, snare removal, and putatively medicinal hygiene behaviors in the Sonso and Waibira chimpanzee communities of the Budongo Forest in Uganda. Reports of these behaviors come from archival records collected from over thirty years of observation at the Budongo Conservation Field Station (BCFS), videos recorded by researchers at the site, and all-occurrence behavioral data collected over two 4-month periods of direct observation. We describe self-directed wound care behaviors such as wound licking, leaf-dabbing, pressing fingers to wounds, and the application of chewed plant material to wounds, as well as a successful self-directed snare removal. We also document self-directed hygiene behaviors including postcoital genital leaf wiping and post-defecation leaf wiping. For the first time in Budongo, we report the presence of prosocial wound care, adding to similar observations documented at other chimpanzee field sites. We present cases of individuals licking, finger pressing, and applying chewed plant material to the wounds of others. We also establish the presence of prosocial postcoital hygiene behaviors, specifically postcoital leaf wiping. Lastly, we report an additional unpublished case of prosocial snare removal. The presence of prosocial-care behaviors between both kin and non-kin individuals at Budongo adds another site to the growing list of locations where such behaviors have been documented, suggesting prosocial healthcare is more widespread across chimpanzee populations than previously recognized.Frontiers in Ecology and Evolution. 13, art. no. 1540922; 2025journal articl
Real-time detection of 3–8-µm microbial particles in sand filter effluent as a surrogate indicator of Cryptosporidium parvum oocysts
Get PDFWaterborne outbreaks of Cryptosporidium infection through drinking tap water are a significant threat to public health. Monitoring Cryptosporidium oocyst-sized microorganisms in sand filter effluent as a surrogate indicator of Cryptosporidium oocysts can detect sand filter integrity breaches. This study aimed to achieve the continuous monitoring of microbial particles (MPs) sized similarly to Cryptosporidium in sand filter effluent by remodeling an MP counter and demonstrating its validity. Instrumental settings of the MP counter (i.e., refractive index and particle diameter) were adjusted for accurate detection of Cryptosporidium parvum oocyst. The remodeled MP counter successfully detected Cryptosporidium parvum and Cryptosporidium-sized microorganisms (Saccharomyces cerevisiae and Chlorella vulgaris). Over a 7-d full-scale test, the MP counter coupled with dialysis pre-treatment continuously detected Cryptosporidium-sized (i.e., 3–8-µm) MPs at 0.2–27 counts/10 mL in the sand filter effluent. However, the variations in MP concentrations were not correlated with those in conventional indicators, such as turbidity and 1–3 or 3–7-µm particle counts, indicating that microbiological water safety cannot be guaranteed with these conventional indicators. Real-time monitoring of 3–8-µm MP concentrations allows for early detection of potential Cryptosporidium leaks through a sand filter. Abnormalities in water quality detected early would allow for effective countermeasures immediately, reducing the risk of waterborne protozoan outbreaks.Water Research X, 27, art. no. 100345; 2025journal articl
Prevalence of Left Ventricular Myocardial Crypts in Japanese Patients
Get PDF長崎大学学位論文 [学位記番号]博（医歯薬）甲第1659号 [学位授与年月日]令和7年3月19日(2025-03-19)thesi
Development of tolerance to bedaquiline by overexpression of trypanosomal acetate:succinate CoA transferase in Mycobacterium smegmatis
Get PDF長崎大学学位論文 [学位記番号]博（医歯薬）甲第1674号 [学位授与年月日]令和7年3月5日(2025-03-05)thesi
Improved survival among elderly patients with aggressive adult T-cell leukemia/lymphoma: Impact of mogamulizumab-containing chemotherapy
Get PDF長崎大学学位論文 [学位記番号]博（医歯薬）甲第1676号 [学位授与年月日]令和7年3月5日(2025-03-05)thesi
Geological Analysis Method Based on Near-Infrared Spectroscopy and Its Application in Tunnel Surrounding Rock Quality Evaluation
Get PDF長崎大学学位論文 [学位記番号]博（工）甲第150号 [学位授与年月日]令和7年2月19日(2025-02-19)thesi
Trapped twice: Discovering the impact of marine benthic plastic debris on small organisms caught in trawl nets
Get PDFThis study quantifies the marine benthic debris caught in a coastal trawl fishery and its impact on capturing small organisms and codend selectivity. From April to September in both 2023 and 2024, marine debris caught during regular fishing operations by two beam trawlers in Tachibana Bay, Nagasaki, was collected and analysed. Any marine organisms found within the debris were identified and measured. The selectivity experiment was conducted in October 2024, adding five plastic bags inside the codend for experimental tows and without plastic bags for control tows. The codend selectivity for the experimental and control tows was estimated either from logistic or contact probability models. There were 1249 pieces of marine debris weighing 45.04 kg collected, which is a small quantity in the coastal waters of Japan, with plastic exceeding 94 % by both number and weight. Among the plastic debris, 250 organisms of 23 species were found trapped, showing a positive correlation (r = 0.71, p < 0.001) between marine benthic plastic debris and bycatch. Three species, Metapenaeopsis barbata, Acropoma japonicum, and Nuchequula nuchalis, were selected for the selectivity analysis. The contact probability model fits better for experimental tows, while the logistic model fits better for control tows for all three species. The estimated contact probabilities were 0.62, 0.48, and 0.59 for the three species. The selectivity curve indicated higher retention probabilities for smaller fish in nets containing plastic bags, suggesting that marine debris adversely affects the selectivity of trawl nets by trapping small organisms.Marine Pollution Bulletin, 217, art. no. 118127; 2025journal articl