检索结果-南通市图书馆

Journal of Forestry Research 2013年第4期24卷 747-754页

作者： Kazuhiro Aruga Gyo Hiyamizu Chikara Nakahata masashi saito Department of Forest Science Faculty of AgricultureUtsunomiya University Frontier Agriscience and Technology Center Faculty of AgricultureShinshu University

We investigated forest road networks and forestry operations before and after mechanization on aggregated forestry operation sites. We developed equations to estimate densities of road networks with average slope angles, operational efficiency of bunching operations with road network density, and average forwarding distances with operation site areas. Subsequently, we analyzed the effects of aggregating forests, establishing forest road networks, and mechanization on operational efficiency and costs. Six ha proved to be an appropriate operation site area with minimum operation expenses. The operation site areas of the forest owners＇ cooperative in this region aggregated approximately 6 ha and the cooperative conducted forestry operations on aggregated sites. Therefore, 6 ha would be an appropriate operation site area in this region. Regarding road network density, higher-density road networks increased operational expenses due to the higher direct operational expenses of strip road establishment. Therefore, road network density should be reduced to approximately 200 m.

关键词： aggregating forests establishing forest road networks mechanization operational efficiency costs

Estimating harvest costs and projecting quantities of logging residues for small-scale forestry in Nasushiobara, Tochigi Prefecture, Japan

在线全文

学校读者我要写书评

暂无评论

Journal of Forestry Research 2014年第4期25卷 965-974页

作者： Chikara Nakahata Ryo Uemura masashi saito Kanae Kanetsuki Kazuhiro Aruga Department of Forest Science Faculty of Agriculture Utsunomiya University 350 Mine Utsunomiya 321-8505 Japan Frontier Agriscience and Technology Center Faculty of Agriculture Shinshu University Nagano 399-4598 Japan Nasunogahara Land Improvement Districts Tochigi 329-2807 Japan

We used GIS on a regional scale to estimate and compare supply potentials and costs of small-scale logging systems, a mini-forwarder and a 4-ton truck operated by private logging contractors, and manual logging and a light truck operated by individual forest own- ers, with the mechanized operational system of the Forest Owners＇ Asso- ciation. Total potential yields of timber and logging residues were esti- mated as 418,895 m3 and 254,962 m3, respectively. The economic bal- ances were estimated and available amounts were projected as supply potentials from profitable sub-compartments. As a result, available amounts of timber and logging residues were estimated at 375,466 m3 （89.9%） and 203,850 m3 （80.0%）, respectively. Because their transport expenses were lower than for other systems the most profitable sub-compartments were operated by private logging contractors who sold logging residues at a plant. The profitable sub-compartments operated by individual forest owners were few because the extracting distances were usually greater than 20 m. Raising logging residue prices from 3,000 yen·m-3 to 4,080 yen·m-3 or 6,800 yen·m-3, and establishing forest roads, which reduced some extracting distances to less than 20 m, increased the number and area of profitable sub＊compartments, and increased available amounts of logging residues.

关键词： GIS supply potentials private logging contractor individual

A model to estimate available timber and forest biomass and reforestation expenses in a mountainous region in Japan

在线全文

学校读者我要写书评

暂无评论

Journal of Forestry Research 2013年第2期24卷 345-356页

作者： Kazuhiro Aruga Ayami Murakami Chikara Nakahata Reiko Yamaguchi masashi saito Kanae Kanetsuki Department of Forest Science Faculty of Agriculture Utsunomiya University Frontier Agriscience and Technology Center Faculty of Agriculture Shinshu University Nasunogahara Land Improvement Districts

We developed a model to estimate supply potentials and available amounts of timber and forest biomass resources from profitable sub-compartments of thinning and final felling operations. Economic balances were estimated while considering not only harvesting expenses but also reforestation expenses after final felling, which should be considered for sustainable forest management. Harvesting expenses were estimated based on two types of timber harvesting systems and three types of forest biomass harvesting systems in each sub-compartment. Then, the model was applied to Nasushiobara city of Tochigi prefecture, Japan. Reforestation expenses had large negative impacts on the financial balances of final felling operations. Few sub-compartments were profitable after considering reforestation expenses. Most profitable sub-compartments were those with mechanized operation systems and landing sales. These accounted for 17.19% of all sub-compartments, while only 5.75% of the sub-compartments were profitable based on their current operation systems and landing sales. Although the overall supply potentials of timber and forest biomass resources were 380,000 m3 and 210,000 Mg, respectively, and 15 times the planned harvest of coniferous tree volume of 25,000 m3year-1 and 50 times the annual demand for the woody gasification power generation of 4,000 Mg year-1 in Nasushiobara, available amounts of timber and forest biomass resources were only49,429 m3 and 33,333 Mg, which were 13.0% and 15.7% of supply potentials for landing sales with mechanized operation systems.

关键词： forest biomass resources supply potentials available amounts economic balance GIS

Operational efficiencies and costs of an arm roll forwarder: A case study at Nasu in Tochigi Prefecture, Japan

在线全文

学校读者我要写书评

暂无评论

Journal of Forestry Research 2013年第3期24卷 577-583页

作者： Kazuhiro Aruga Yuto Otsuka Chikara Nakahata Reiko Yamaguchi masashi saito Mayu Nagasaki Department of Forest Science Faculty of Agriculture Utsunomiya University350 Mine Utsunomiya 321-8505 Japan Frontier Agriscience and Technology Center Faculty of Agriculture Shinshu UniversityNagano 399-4598 Japan Japan Wood Energy Co. Ltd.Tokyo 198-0036

We investigated a developed arm roll forwarder at Nasu in Tochigi Prefecture, Japan. An arm roll forwarder can only load a steel container that has been fully loaded with logs beforehand, and can later unload such a container. Such a forwarder can shorten the loading and untoading times and improve operational efficiency. We examined two operation systems with an arm roll forwarder and a forwarder. In the first system the loading was done with a grapple-loader. In the second system the loading was done with a processor. The loading times of an arm roll forwarder were significantly tess than those of a forwarder. Because the optimal cycle times （excluding the waiting times for an arm roll for- warder） were significantly reduced, the costs of using an arm roll for- warder are lower, although the loading capacity was small and the hourly operation cost was high. The maximum operational efficiencies varied depending on forwarding distances. The second operation system with an arm roll forwarder exhibited the best operational efficiency within a 1,580-m forwarding distance, and beyond that distance it exhibited the highest operational efficiency when a forwarder was used. Similarly, the cost of operation of the system with an arm roll forwarder was the lowest within a 1,130-m forwarding distance, and beyond that distance the cost was the lowest when using the forwarder. Therefore, the arm roll for- warder is effective within a certain forwarding distance.

关键词： arm roll forwarder steel container operational efficiency cost forwarding distance

Real-world local recurrence rate after cold polypectomy in colorectal polyps less than 10 mm using propensity score matching

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2021年第47期27卷 8182-8193页

作者： masashi saito Takeshi Yamamura Masanao Nakamura Keiko Maeda Tsunaki Sawada Eri Ishikawa Yasuyuki Mizutani Takuya Ishikawa Naomi Kakushima Kazuhiro Furukawa Eizaburo Ohno Hiroki Kawashima Masatoshi Ishigami Mitsuhiro Fujishiro Department of Gastroenterology and Hepatology Nagoya University Graduate School of MedicineNagoya 4668550Japan Department of Endoscopy Nagoya University HospitalNagoya 4668550Japan

BACKGROUND Cold polypectomy(CP)is a simple and safe procedure for polyps less than 10 mm in size;however,there is concern about local recurrence following CP because of unidentified margins of excised specimens and the lack of tumor suppression effect by *** clinical trials have evaluated local persistent recurrence;their results suggest that a higher rate of local recurrence has not been documented so *** were few reports that observed the course over long periods of time after CP in clinical *** To evaluate the presence of local recurrence following CP and hot polypectomy(HP)using propensity score *** We analyzed 275 patients who underwent polypectomy for non-pedunculated colorectal polyps less than 10 mm(959 Lesions)between October 2016 and 2017 and underwent follow-up endoscopy *** divided them into the CP group(706 Lesions),wherein CP was performed,and the HP group(253 Lesions),wherein HP was *** propensity score matching,we extracted 215 Lesions in each group and evaluated the local recurrence and content of CP in the real clinic and adverse events using medical *** After propensity score matching,there were no significant differences in the patients’and their endoscopic background(age,use of antithrombotics,indications,size,morphology,location of polyps,and polypectomy device)between the *** mean duration between colorectal polypectomy and the next follow-up colonoscopy was 17.5±7.1(range,6-39)mo in the CP group and 15.7±6.0(range,6-35)mo in the HP group,which was significantly longer in the CP group(P=0.005).The local recurrence rate was 0.93%in the CP group and 0.93%in the HP group,without a significant difference(P=0.688).Additionally,no differences were observed in the macroscopic en bloc resection rate,histopathological complete resection rate,and pathological results between the *** events did not occur in either *** Local recurrence after CP was

关键词： Cold polypectomy Colorectal polyp Hot polypectomy Local recurrence Safety Propensity score matching

The Evaluation of Tolvaptan Therapy and Long-Term Prognosis in Hepatocellular Carcinoma with Refractory Ascites

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Gastroenterology 2018年第2期8卷 39-44页

作者： Masaaki Shimada Hiroaki Iwase Noboru Hirashima masashi saito Hisashi Kondo Noboru Urata Satoshi Unita Takashi Kondo Daiki Tanaka Department of Gastroenterology National Hospital Organization Nagoya Medical Center Nagoya Japan

We investigated Tolvaptan efficacy and long-term prognosis with focus on nutrition in 20 patients with refractory hepatic ascites in hepatocellular carcinoma (HCC). Bloating improved in 55% of patients, as determined using a Japanese version of the Support Team Assessment Schedule. Nutritional status improved with Tolvaptan treatment, based on the Controlling Nutritional Status score and Onodera’s prognostic nutritional index. Long-term prognosis was better in responders than in non-responders (mean survival time: 308 days vs. 97 days, p = 0.031). Tolvaptan was even effective in many patients with HCC, with additional improvement in long-term prognosis expected with improvement in the nutritional status.

关键词： Tolvaptan Hepatic Ascites Sarcopenia Loop Diuretics Long-Term Prognosis

Role of T-box transcription factor 3 in gastric cancers

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 Gastrointestinal Pathophysiology 2023年第2期14卷 12-20页

作者： Naoki Asano Akira Imatani Akio Takeuchi masashi saito Xiao-Yi Jin Waku Hatta Kaname Uno Tomoyuki Koike Atsushi Masamune Division of Gastroenterology Tohoku University Graduate School of MedicineSendai 980-8574Japan

The expression of T-box transcription factor 3(TBX3)has been identified in various cancers,including gastric *** role in breast cancers and melanomas has been intensively studied,and its contribution to the progression of cancers through suppressing senescence and promoting epithelial-mesenchymal transition has been *** reports on the role of TBX3 in gastric cancers have implied its involvement in gastric *** its pivotal role in the initiation and progression of cancers,TBX3 could be a promising therapeutic target for gastric cancers.

关键词： Aging Wnt β-catenin Transforming growth factor-β Stomach Carcinogenesis

The Effect of Loop Diuretics on Sarcopenia and Long-Term Prognosis in Patients with Refractory Hepatic Ascites Treated with Tolvaptan

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Gastroenterology 2018年第6期8卷 201-208页

作者： Masaaki Shimada Hiroaki Iwase Noboru Hirashima masashi saito Hisashi Kondo Noboru Urata Satoshi Unita Takashi Kondo Daiki Tanaka Takuya Tsunekawa Department of Gastroenterology National Hospital Organization Nagoya Medical Center Nagoya Japan

We investigated sarcopenia, focusing on the dose of loop diuretics used in 70 patients with refractory hepatic ascites treated with tolvaptan. Bloating improved in 68.5% of patients, as determined using the Japanese version of the Support Team Assessment Schedule. The psoas muscle index (PMI) was used to define sarcopenia. A statistically significant difference was observed in the PMI between patients receiving low-dose (3.6 ± 1.2 cm2/m2) and high-dose furosemide (3.1 ± 1.2 cm2/m2) before tolvaptan treatment (P = 0.048). The PMI increased from 3.2 ± 1.1 cm2/m2 to 3.5 ± 1.3 cm2/m2 (P = 0.002) in responders, but decreased from 3.4 ± 1.2 cm2/m2 to 3.0 ± 1.0 cm2/m2 (P = 0.106) in non-responders before and after tolvaptan treatment, respectively. The long-term prognosis improved in responders compared with non-responders (mean survival time: 646 days vs. 228 days, P < 0.001). Early introduction of tolvaptan treatment is necessary to prevent the progression of sarcopenia.

关键词： Tolvaptan Hepatic Ascites Sarcopenia Loop Diuretics Long-Term Prognosis

Predictive Factors Differ between Hepatocellular Carcinoma Occurrence and Recurrence after Sustained Virological Responses by Direct-Acting Antivirals in Patients with Hepatitis C

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Gastroenterology 2020年第1期10卷 1-13页

作者： Noboru Hirashima Masaaki Shimada Noboru Urata Takuya Tsunekawa Satoshi Unita Takashi Kondo Daiki Tanaka Hisashi Kondo masashi saito Hiroaki Iwase Department of Gastroenterology National Hospital Organization Nagoya Medical Center Nagoya Japan

Background: Interferon-free direct-acting antivirals (DAA) have markedly increased the sustained virological response (SVR) rate among patients with hepatitis C. Although DAA inhibit the development of hepatocellular carcinoma (HCC), predictive factors remain unclear. The aims of the present study were to investigate predictive factors for HCC occurrence and recurrence after SVR by DAA in prospectively followed patients with hepatitis C (HCV). Methods: One hundred and eighty-three HCV-infected patients treated with DAA and achieving SVR were prospectively followed up for more than one year. Among these patients, 166 had no history of HCC before DAA therapy, while 17 had a history of being treated for HCC by radiofrequency ablation or resection before the initiation of DAA. Liver stiffness (LS) measurements were conducted using transient elastography, and LS was assessed at the initiation of DAA (LS0), 24 weeks after the initiation of DAA (LS24), 48 weeks after (LS48), and every year after that. Results: HCC occurred in 7 out of 166 patients without a history of HCC (4.2%), and recurred in 9 out of 17 with a history of HCC (52.9%). Patients with a history of HCC were significantly older, mainly males, had higher alpha-fetoprotein (AFP) levels before DAA and at SVR24, higher Fib-4 levels, and higher LS0, 24, and 48 than those without a history of HCC. Age (p = 0.013) and AFP at SVR24 (p = 0.036) correlated with occurrence. LS48 (p = 0.043) correlated with recurrence. Conclusions: Predictive factors differed between HCC occurrence and recurrence after SVR by DAA in HCV patients. High recurrence rates were due to fibrosis in the liver being more advanced in patients with than in those without a history of HCC. Age and AFP at SVR24 were identified as predictive factors of HCC occurrence and LS48 of HCC recurrence.

关键词： Predictive Factor HCC Occurrence and Recurrence SVR DAA

mpact of antioxidants on seminal vesicles function ind fertilizing potential in diabetic rats

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Asian Journal of Andrology 2017年第6期19卷 639-646页

作者： Panagiota Tsounapi masashi Honda Fotios Dimitriadis Bunya Kawamoto Katsuya Hikita Kuniyasu Muraoka Motoaki saito Nikolaos Sofikitis Atsushi Takenaka Division of Urology Department of Surgery Tottori University School of Medicine 36-1 Nishimachi Yonago 683-8503 Japan Department of Urology University of Ioannina School of Medicine P.O. Box 1186 45110 Ioannina Greece Department of Pharmacology Kochi University Kochi Medical School Nankoku 783-8505 Japan.

Diabetes mellitus significantly affects the male reproduction and sexual function. In the present study, we investigated the diabetes-induced dysfunction of seminal vesicles （SVs） in the diabetes-rat model and the role of antioxidants. Streptozotocin-induced diabetes after 4 weeks caused smaller size of the organs, hypercontractility, histological abnormalities, increased concentrations of malondialdehyde in the serum and tissue, overexpression of oxidative stress markers, and cleaved caspase-3 as identified by immunohistochemistry in the SVs. In addition, diabetes resulted in deceased levels of serum testosterone and no newborns after the mating studies. Antioxidants significantly normalized all the above parameters, except for the severely decreased serum testosterone levels and the negative outcome of the mating studies. The present study gives evidence for the important role of diabetes-induced oxidative stress in the function and structure of these androgen-dependent organs. Antioxidants may be a promising supplementary therapy for diabetic male patients to alleviate ejaculatory disorders but alone is not efficient treatment for the mitigation of infertility.

关键词： diabetes mellitus male infertility oxidative stress seminal vesicles seminiferous epithelium smooth muscle cellcontractions