检索结果-南通市图书馆

Are James Webb Space Telescope Observations Consistent with Warm Dark Matter?

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Impacts of bovine spongiform encephalopathy and avian influenza on U.S. meat demand

International Journal of Astronomy and Astrophysics（天文学与天体物理学国际期刊） 2024年第1期 45页

作者： bruce Hoeneisen

来源：博看期刊评论

在线全文

博看期刊

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2015年第6期14卷 1130-1141页

作者： Jianhong E Mu bruce A McCarl Amy Hagerman David Bessler Department of Applied Economics Oregon State University Department of Agricultural Economics Texas A&M University Center for Epidemiology and Animal Health Veterinary Services Animal and Plant Health Inspection Service United States Department of Agriculture

This paper examines the U.S. meat demand impacts of the announced outbreaks of bovine spongiform encephalopathy（BSE） and avian influenza（AI）. Findings indicate that beef and chicken demand was negatively affected by BSE and AI disease outbreaks. Specifically, in the short run, U.S. consumers shift demand due to both outbreaks but more so due to domestic disease outbreaks than for outbreaks occurring overseas-the impact of U.S. AI outbreaks is about 0.5% for beef and the impact of U.S. BSE cases is around –0.42% for beef and 0.4% for pork, respectively. Regarding the BSE shock on meat demand, there is a high rate of beef demand adjusted from disturbance to the long-run equilibrium and a lower adjustment rate for chicken demand because of the repeated outbreaks of AI worldwide. In the long run, information related to severe, persistently recurring overseas animal disease outbreaks changes U.S. consumers＇ meat consumption patterns. Although effects of animal diseases on U.S. meat demand were statistically significant, the magnitudes were small-the impact of WHO reported human death numbers for AI is 0.005% for beef, –0.002% for pork, and –0.006% for chicken and the impact of U.S. BSE cases is 1.1% for pork and –0.7% for chicken.

关键词： spongiform avian chicken bovine encephalopathy overseas disturbance adjustment pathogenic deaths

Melanization in living organisms: a perspective of species evolution

在线全文

学校读者我要写书评

暂无评论

Protein & Cell 2010年第9期1卷 830-841页

作者： Christopher J Vavricka bruce M.Christensen Jianyong Li CAS Key Laboratory of Pathogenic Microbiology and Immunology Institute of MicrobiologyChinese Academy of Sciences(CASPMI)Beijing 100101China Department of Pathobiology University of Wisconsin-MadisonMadisonWI 53706USA Department of Biochemistry Virginia TechBlacksburgVA 24061USA

Eumelanin is a heteropolymer that is generally composed of hydroxylated indole residues and plays diverse protective functions in various *** is derived from the amino acid tyrosine and production of melanin is a highly complex oxidative process with a number of steps that can either proceed enzymatically or *** melanin plays important protective roles in many species,during melanization,particularly in steps that can proceed non-enzymatically,many toxic intermediates are produced,including semiquinones,dopaquinone,indole-quinones and moreover,the production of many reactive oxygen *** mitigate the production of reactive species,a number of proteins that regulate the biochemical process of melanization have evolved in various living species,which is closely related to adaptation and physiological *** this communication,we discuss differences between non-enzymatic and enzymatic processes of melanization and the enzymatic regulation of melanization in difference species with an emphasis on differences between mammals and *** between melanization and insect sclerotization is also emphasized which raises some interesting questions about the current models of these pathways.

关键词： melanization melanogenesis sclerotization tanning dopa tyrosinase dopachrome tautomerase

Effect of diets on the feeding behavior and physiological properties of suspension-feeding sea cucumber Cucumaria frondosa

在线全文

学校读者我要写书评

暂无评论

Journal of Oceanology and Limnology 2020年第3期38卷 883-893页

作者： YU Zonghe ROBINSON Shawn MACDONALD bruce LANDER Terralynn SMITH Craig College of Marine Sciences South China Agricultural UniversityGuangzhou 510642China Fisheries and Oceans Canada St.Andrews Biological StationSt.AndrewsNB E5B 2L9Canada Biology Department and Centre for Coastal Studies and Aquaculture University of New BrunswickSaint JohnNB E2L 4L5Canada

The suspension-feeding sea cucumber Cucumaria frondosa has become commercially important in recent *** proper diets is the first important step for intensive aquaculture of this sea *** this study,adult *** were exposed to one of the following diet treatments:control(no diet provided),two powdered seaweeds(Ascophyllum nodosum and Saccharina latissima),a commercially available microalgal diet(shellfish diet)and natural *** effects of diets on the feeding behavior and physiological properties of sea cucumbers were investigated after a 5-week rearing *** show that sea cucumbers fed with shellfish diet exhibited a significantly higher tentacle insertion rate(1.80±0.20 insertion/min)than these fed with seaweed powders,and there was no significant different between the two groups fed by seaweed *** significant difference was found on the fecal production rate among the feeding *** minimum oxygen consumption rate was observed in the control group(5.76±0.99μg O2/(g·h)),which is significantly lower than individuals fed with ***,shellfish diet,and natural seston;however,no significant difference was shown between those of control and *** *** maximum ammonium excretion rate was found in the *** group(0.03±0.01μmol/(g·h)),which is significantly higher than other *** minimum O/N ratio was observed in the *** group(14.57±1.04),which is significantly lower than the ***,shellfish diet,and natural seston *** fed with seaweed powders had similar physiological properties with these fed with microalgae diet and natural seston,indicating that *** and *** can be explored as promising diets for intensive aquaculture of ***.

关键词： sea cucumber Cucumaria frondosa physiological property feeding behavior nutritional condition

Nicotine-induced upregulation of antioxidant protein Prx 1 in oral squamous cell carcinoma

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2013年第16期58卷 1912-1918页

作者： ZHAO YanHua ZHANG Min YAN Fei CASTO bruce C TANG XiaoFei Division of Oral Pathology Beijing Institute of Dental Research School of Stomatology Capital Medical University Division of Medical Oncology Department of Internal Medicine Ohio State University College of Medicine and Comprehensive Cancer Center Division of Environmental Health Sciences Ohio State University College of Public Health

Nicotine is a source of exogenous oxidative stress, which is associated with the pathogenesis of numerous diseases including oral squamous cell carcinoma (OSCC), whereas an antioxidant protein, peroxiredoxin 1 (Prx 1), plays an important role in the modulation of this condition. This study was to investigate the association between Prx 1 and tobacco-induced oxidative stress. The expression of Prx 1 and GST in OSCC Tca8113 cells, which were pre-treated with nicotine, was determined. In the present study, MTT assay, reactive oxygen species (ROS) assay, RT-PCR and Western blot analyses, respectively, were conducted to assess cell viability, ROS level, and expression level of Prx 1 and GST in nicotine-treated Tca8113 cells. Nuclear factor kappa B (NF- B) expression was detected by immuno-fluorescence. Our results showed the growth of Tca8113 cells was increased in a dose-dependent manner when cells were treated with nicotine at concentrations from 0.1 to 10 mol/L, but the proliferation of the cells decreased at 100 mol/L. ROS levels increased in all groups treated with nicotine at concentrations of 0.1, 1, 10, or 100 mol/L for 24h. Prx 1 and GST mRNA and protein expression were up-regulated in cells treated with nicotine for the same time at different concentrations or at the same concentration for different times (P<0.05). NF-B was translocated from cytoplasm to nucleus, the expression of NF- B was increased in nucleus. These results suggest that up-regulation of Prx1 expression appears to be associated with tobacco-induced oxidative stress, which may play an important role in the pathogenesis of OSCC.

关键词：鳞状细胞癌蛋白表达抗氧化剂尼古丁口腔诱导氧化应激 RT-PCR

Effect of dilution gas composition on the evolution of graphite electrode characteristics in the spark gap switch

在线全文

学校读者我要写书评

暂无评论

Plasma Science and Technology 2021年第6期23卷 74-82页

作者： Hongyu DAI Lee LI Shuai REN Jingrun GUO Xin GONG Anthony bruce MURPHY State Key Laboratory of Advanced Electromagnetic Engineering and Technology Key Laboratory of Pulsed Power Technology(Ministry of Education)School of Electrical and Electronic EngineeringHuazhong University of Science&TechnologyWuhan 430074People's Republic of China CSIRO Manufacturing Lindfield NSW 2070Australia

As the widely implemented electrode material,graphite has the characteristic of sublimation by the thermal shock of the switching arc,and the produced carbon vapor is easy to condense into carbon powders and deposit in the *** impact of the type of dilution gas in a mixture of20%oxygen and 80%dilution gas on the sublimation and oxidation characteristics of the graphite electrode is *** is found that when nitrogen dilution gas was replaced by argon,the heat flux to the electrodes decreased,which led to a 63%reduction of graphite *** the same time,the cooling rate of the arc was slower in argon,which promotes oxidation of the carbon *** residual solid carbon can be reduced by 70%–85%by using argon as the dilution ***,it is demonstrated that the stability and working life of the switch could be increased by appropriate selection of the dilution gas.

关键词： pulsed discharge graphite electrode thermal arc dilution gas electrode erosion

Business statistics in practice / bruce L. Bowerman, Richard T. O'Connell, Michael L. Hand. 2nd ed.

在线全文

学校读者我要写书评

暂无评论

Balance the Paradox between Limited Health Resources and Growing Demands for Medical Services

2001年

作者： bruce L. Bowerman Richard T. O'Connell Michael L. Hand.

来源：畅想之星图书光盘版（南... 评论

在线全文

畅想之星图书光盘版（南通市图书馆镜像）

学校读者我要写书评

暂无评论

Chinese Journal of Population,Resources and Environment 2008年第1期6卷 57-62页

作者： Gao Tian bruce Gurd Wang Guoxing International Graduate School of Business University of South Australia GPO Box 2471 Adelaide 5000 Australia Jinan Central Hospital Affiliated to Shandong University Jinan Shandong 250013 China

Health institutions in the People’s Republic of Chinaare under considerable challenge. Innovations in management systems may support the challenge to increase both efficiency and effectiveness. The balanced scorecard (BSC) is one such innova-tion. We have used a model to explore the factors that may impact the diffusion of the BSC in Chinese government hospitals. In particular, we concentrate on three factors — the outer context, the nature of the innovation and the communication and influence. The outer context and the nature of the innovation do provide an inducement to implement a BSC. The strength of the communica-tion and influence may affect the level of take-up. However, we recognise that they may choose the BSC not for any apparent technical excellence but for the legitimation that Western man-agement practices may bring to local managers.

关键词： balanced scorecard hospital diffusion of innovation

Pseudocirrhosis in a pancreatic cancer patient with liver metastases: A case report of complete resolution of pseudocirrhosis with an early recognition and management

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2008年第10期14卷 1622-1624页

作者： Soonmo Peter Kang Tamar Taddei bruce McLennan Jill Lacy Yale Cancer Center Yale University School of Medicine New Haven Connecticut 06520 United States Yale University School of Medicine Department of Medicine Section of Digestive Diseases New Haven Connecticut 06520 United States Yale University School of Medicine Department of Diagnostic Radiology New Haven Connecticut 06520 United States

We report a case of pseudocirrhosis arising in the setting of regression of liver metastases from pancreatic cancer. A 55-year-old asymptomatic woman presented to our clinic with newly diagnosed metastatic pancreatic cancer with extensive liver metastases. She underwent systemic chemotherapy with gemcitabine and oxaliplatin (GEMOX). After 8 cycles of therapy, she had a remarkable response to the therapy evidenced by decline of carcinoembryonic antigen (CEA) and CA19 by > 50% and nearly complete resolution of hepatic metastases in computed tomography (CT) scan. Shortly after, she developed increasing bilateral ankle edema and ascites, associated with dyspnea, progressive weight gain, and declining performance status. Gemcitabine and oxaliplatin were discontinued as other causes of her symptoms such as congestive heart disease or venous thrombosis were ruled out. CT scan 6 mo after the initiation of GEMOX revealed worsening ascites with a stable pancreatic mass. However, it also revealed a lobular hepatic contour, segmental atrophy, and capsular retraction mimicking the appearance of cirrhosis. She was managed with aggressive diuresis and albumin infusions which eventually resulted in a resolution of the above- mentioned symptoms as well as complete resolution of pseudocirrhotic appearance of the liver and ascites in CT scan. This case demonstrates that pancreatic cancer patients can develop pseudocirrhosis. Clinicians and radiologist should be well aware of this entity asearly recognition and management can lead to a near complete recovery of liver function and much improved quality of life as illustrated in this case.

关键词： Pseudocirrhosis Pancreatic cancer Nodular regenerative hyperplasia Chemotherapy induced liver toxicity