检索结果-南通市图书馆

Energy-Preserving H1–Galerkin Schemes for the Hunter-Saxton Equation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Mathematical Research with Applications 2017年第1期37卷 107-118页

作者： Yuto MIYATAKE Geonsik eom Tomohiro SOGABE Shaoliang ZHANG Department of Computational Science and Engineering Graduate School of EngineeringNagoya University

We consider the numerical integration of the Hunter–Saxton equation, which models the propagation of weakly nonlinear orientation waves. For the equation, we present two weak forms and their Galerkin discretizations. The Galerkin schemes preserve the Hamiltonian of the equation and can be implemented with cheap H1elements. Numerical experiments confirm the effectiveness of the schemes.

关键词： Hunter-Saxton equation energy-preservation Galerkin methods

Laparoscopy-assisted pylorus-preserving gastrectomy for early gastric cancer: A retrospective study of long-term functional outcomes and quality of life

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2019年第36期25卷 5494-5504页

作者： Bang Wool eom Boram Park Hong Man Yoon Keun Won Ryu Young-Woo Kim Center for Gastric Cancer National Cancer Center Goyang 10408 South Korea Biostatistics Collaboration Team Research Core Research institute National Cancer Center Goyang 10408 South Korea

BACKGROUND Laparoscopy-assisted pylorus-preserving gastrectomy (LAPPG) was known to have benefits of function-preserving surgery compared to laparoscopy-assisted distal gastrectomy (LADG). However, in clinical settings, delayed gastric emptying and esophageal reflux following LAPPG can be serious issues, making surgeons reluctant to perform LAPPG. It is unclear that LAPPG had better longterm functional outcomes and quality of life compared to LADG. AIM To evaluate the long-term functional outcomes and patient-reported quality of life of LAPPG compared to those of LADG. METHODS We reviewed the clinicopathological data of 195 patients who underwent LADG with Billroth II anastomosis and 101 patients who underwent LAPPG for cT1N0 gastric cancer in the middle third of the stomach between 2012 and 2015. Postoperative complications, nutritional parameters, and survey results of the European Organization for Research and Treatment of Cancer Questionnaire C30 and STO22 questionnaire were compared between the two groups. RESULTS The serum hemoglobin level was significantly higher in the LAPPG group than in the LADG group (P < 0.001). In the endoscopic findings, incidence of bile reflux was lower (P < 0.001);however, the incidence of residual food was higher in the LAPPG group than in the LADG group (P < 0.001). Regarding the quality of life score, the LAPPG group had a better physical functioning score (86.7 vs 90.0, P = 0.032) but also greater pain and reflux when compared to the LADG group [8.3 vs 16.7 in pain, 11.1 (interquartile range, 0, 22.2) vs 11.1 (interquartile range, 11.1, 33.3) in reflux, P = 0.034 and 0.001, respectively]. CONCLUSION LAPPG is beneficial to recovery of anemia and to bile reflux, however, it might be unfavorable in terms of pain and reflux symptoms compared to LADG with Billroth II anastomosis.

关键词： Gastric cancer Pylorus-preserving gastrectomy Function Quality of life

Expression and self-assembly of Heterocapsa circularisquama RNA virus-like particles synthesized in Pichia pastoris

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2012年第25期57卷 3288-3293页

作者： WU YuanZheng KIM Wonduck KIM Si-Wou eom Chi-Yong YANG HeTong SHIN Hyun-Jae Department of Chemical and Biochemical Engineering Chosun University Gwangju 501-759 Republic of Korea Department of Environmental Engineering Chosun University Gwangju 501-759 Republic of Korea Seoul Center Korea Basic Science Institute Seoul 136-713 Republic of Korea Biotechnology Center of Shandong Academy of Sciences Jinan 250014 China

Heterocapsa circularisquama RNA virus(HcRNAV) is the first single-stranded RNA virus to be characterized that infects *** ability of HcRNAV coat protein(HcRNAV CP) to self-assemble into virus-like particles(VLPs) in vitro suggested that heterologous expression was possible,and that the VLPs might be ideal nanocontainers for the targeted delivery of genes and *** this paper,we report the expression of a codon-optimized HcRNAV 109 CP gene in Pichia pastoris and the production of self-assembled HcRNAV VLPs using large-scale *** HcRNAV 109 CP gene was synthesized according to the codon preference of *** and cloned into a pPICZA *** recombinant plasmid pPICZA-CPsyns was transformed into *** by *** resulting yeast colonies were screened by PCR and analyzed for protein expression by SDS polyacrylamide gel *** large-scale fermentation,the yield of HcRNAV CPsyns reached approximately 2.5 g L 1 within 4 *** HcRNAV VLPs were purified using PEG precipitation followed by cesium chloride density gradient ultracentrifugation,and were subsequently analyzed using UV spectrophotometry and transmission electron *** dye-labeled myoglobin was loaded into the cages of the HcRNAV VLPs and the encapsulation was confirmed by fluorescence *** results point to the possible utilization in pharmacology or nanotechnology of HcRNAV VLPs produced by *** fermentation.

关键词：巴斯德毕赤酵母病毒样颗粒 RNA病毒 pastoris 基因合成自组装透射电子显微镜分析紫外分光光度法

In situ staining of the primo vascular system in the ventricles and subarachnoid space of the brain by trypan blue injection into the lateral ventricle

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2011年第28期6卷 2171-2175页

作者： Jingxing Dai Byung-Cheon Lee Ping An Zhendong Su Rongmei Qu Ki Hoon eom Kwang-Sup Soh Department of Human Anatomy Southern Medical University Guangzhou 510515 Guangdong Province China Nano Primo Research Center Advanced Institute of Convergence Technology Seoul National University Seou1443-270 Korea Pharmacupuncture Medical Research Institute Korean Pharmacupuncture Institute Seoul Korea

We examined a new method for visualization of the primo vascular system in the rat brain involving lateral ventricle injection of trypan blue. Results showed that the primo vascular system in the lateral ventricles and arachnoid mater of the brain were preferentially stained relative to blood vessels and fascia. The primo-vessels along blood vessels in the brain were clearly exhibited. In addition, the primo vascular system was evident between the fourth ventricle and the quadrigeminal cistern. Our experimental findings indicate that this new technique of lateral ventricle injection of trypan blue can visualize the primo vascular system in lateral ventricles and arachnoid mater of rats in situ.

关键词： trypan blue primo vascular system fascia cerebral ventricles choroid plexus neuroanatomy neural regeneration

维普期刊数据库

Chemoresistive materials for electronic nose:Progress,perspectives,and challenges

在线全文

学校读者我要写书评

暂无评论

InfoMat 2019年第3期1卷 289-316页

作者： Seo Yun Park Yeonhoo Kim Taehoon Kim Tae Hoon eom Soo Young Kim Ho Won Jang Department of Materials Science and Engineering Research Institute of Advanced MaterialsSeoul National UniversitySeoulRepublic of Korea Center for Integrated Nanotechnologies Los Alamos National LaboratoryLos AlamosNew Mexico School of Chemical Engineering and Materials Science Chung-Ang UniversitySeoulRepublic of Korea

An electronic nose(e-nose)is a device that can detect and recognize odors and flavors using a sensor *** has received considerable interest in the past decade because it is required in several areas such as health care,environmental monitoring,industrial applications,automobile,food storage,and ***,there are still obstacles in developing a portable e-nose that can be used for a wide variety of *** practical applications of an e-nose,it is necessary to collect a massive amount of data from various sensing materials that can transduce interactions with molecules reliably and analyze them via pattern *** addition,the possibility of miniaturizing the e-nose and operating it with low power consumption should be ***,it should work efficiently over a long period of *** satisfy these requirements,several different chemoresistive material platforms including metal oxides,organics such as polymers and carbonbased materials,and two-dimensional materials were investigated as sensor elements for an *** an individual material has limited selectivity,there is a continuing effort to improve the selectivity and gas sensing properties through surface decoration and compositional and structural *** produce a reliable e-nose,which can be used for practical applications,researches in various fields have to be *** paper reviews the progress of research on e-noses based on a chemoresistive gas sensor array and discusses the inherent challenges and potential solutions.

关键词： chemoresistive materials electronic nose metal oxides polymers two-dimensional materials

The effect of sunblock against oxidative stress in farmers：a pilot study

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The Journal of Biomedical Research 2017年第4期31卷 344-349页

作者： Yong-Dae Kim Dong-Hyuk Yim Sang-Yong eom Ji Yeoun Lee Heon Kim Center for Farmers' Safety and Health Chungbuk National University Hospital Cheongju Republic of Korea Department of Preventive Medicme College of Medwme Chungbuk Nattonal Umverszty Cheonglu Repubhc of Korea Department of Dermatology College of Medicine Chungbuk National University Cheongju Republic of Korea

Farmers are frequently exposed to ultraviolet（UV） radiation which causes various diseases by inducing oxidative *** study aimed to assess the effects of sunblock on oxidative stress in the ***-seven farmers were divided into two groups：those who wore sunblock for five days and those who did *** total antioxidant capacity（TAC） in urine,which is an antioxidant indicator,and 8-hydroxy-2-deoxyguanosine（8-OHdG） levels in urine,an oxidative stress indicator,were *** urinary TAC of sunblock users was significantly higher than that of non-users,but urinary 8-OHdG levels were not significantly *** after adjustment for potential confounders,urinary TAC was found to be markedly increased with sunblock *** results suggest that sunblock is effective in preventing oxidative stress among *** addition,they show that urinary TAC can be used as a good effect marker of oxidative stress caused by UV exposure.

关键词： farmers ultraviolet rays sunscreening agents oxidative stress total antioxidant capacity

维普期刊数据库

Effect of natural extract eye drops in dry eye disease rats

在线全文

学校读者我要写书评

暂无评论

International Journal of Ophthalmology(English edition) 2020年第7期13卷 1023-1030页

作者： Soo Youn Choi Youngsub eom Jee Yong Kim Dong Hoon Jang Jong Suk Song Hyo Myung Kim Department of Ophthalmology Korea University College of MedicineSeoul 02841Republic of Korea BGN World Tower Eye Clinic Seoul 05551Republic of Korea Department of Ophthalmology Korea University Ansan HospitalKorea University College of MedicineGyeonggi-do 15355Republic of Korea Medical O Co. Ltd.Seoul 06025Republic of Korea

AIM:To investigate the therapeutic effect of natural extract eye drops containing bee venom,musk,and deer antlers in dry eye disease(DED)animal ***:Scopolamine-injected DED rats and lacrimal gland-excised rats were allocated into control,saline,and natural extract groups respectively and a normal group(lacrimal gland excision was not performed)in lacrimal gland-excised *** eye drop instillation 4 times a day for 5 d,corneal fluorescein staining(CFS)scores,tear MUC5AC levels,and tear lactic dehydrogenase(LDH)levels were ***:In scopolamine-injected rats,the natural extract-treated group had significantly lower CFS scores(1.7±0.5,4.7±1.4,3.8±1.9,P=0.006)and tear LDH levels(0.10±0.01,0.19±0.01,0.16±0.08 OD,P=0.014)but higher tear MUC5AC levels(12.9±3.7,7.9±2.0,9.7±3.6 ng/m L,P=0.041)compared with the control and saline-treated *** were no significant differences between the control and saline-treated *** lacrimal gland-excised rats,the natural extract-treated group also had lower CFS scores(4.3±1.2,11.5±2.3,9.0±1.9,P<0.001,P=0.001)and tear LDH levels(0.30±0.08,0.48±0.12,0.39±0.05 OD,P<0.05)but higher tear volume(4.3±0.9,1.9±0.7,2.8±1.1 mm,P=0.005,P=0.124)and tear MUC5 AC levels(8.2±2.0,2.9±1.2,5.4±2.2 ng/m L,P<0.001,P=0.047)compared with the control and saline-treated *** were no significant differences in the CFS scores,tear MUC5AC level,and tear LDH level between the normal and natural extracttreated ***:The natural extract consisting of bee venom,musk,and deer antlers may have effectiveness in DED treatment by restoring the damaged ocular surface,increasing tear volume,and recovering the tear mucin layer in DED rats.

关键词： bee venom musk deer antler natural extract dry eye disease rat

Ultrafast Martensitic Phase Transition Driven by Intense Terahertz Pulses

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Ultrafast Science 2023年第1期3卷 27-32页

作者： B.Q.Song X.Yang C.Sundahi J-H.Kang M.Mootz Y.Yao I.E.Perakis L.Luo C.B.eom J.Wang Department of Physics and Astronomy lowa State UniversityAmesIA 50011USA Ames National Laboratory of U.S.DOE AmesIA 50011USA Department of Materials Science and Engineering.University of Wisconsin-Madison MadisonWI 53706USA Department of Physics University of Alabama at BirminghamBirminghamAL35294-1170USA

We report on an ultrafast nonequilibrium phase transition with a strikingly long-lived martensitic anomaly driven by above-threshold single-cycle terahertz pulses with a peak field of more than 1 MV/cm.A nonthermal,terahertz-induced depletion of low-frequency conductivity in Nb_(3)Sn indicates increased gap splitting of high-energy Г_(12) bands by removal of their degeneracies,which induces the martensitic phase above their equilibrium transition *** contrast,optical pumping leads to a Г_(12) gap thermal *** light-induced nonequilibrium martensitic phase exhibits a substantially enhanced critical temperature up to~100 K,i.e.,more than twice the equilibrium temperature,and can be stabilized beyond technologically relevant,nanosecond time *** with first-principle simulations,we identify a compelling terahertz tuning mechanism of structural order via Г_(12) phonons to achieve the ultrafast phase transition to a metastable electronic state out of equilibrium at high temperatures far exceeding those for equilibrium states.

关键词： martensitic equilibrium nonequilibrium

Photonic Crystal Fiber Attenuator

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

光学学报 2003年第S1期23卷 -页

作者： Joo Beom eom Hokyung Kim Jinchae Kim Un-Chul Paek Byeong Ha Lee Department of Information and Communications Kwangju Institute of Science and Technology 1 Oryong-dong

We propose a novel fiber attenuator based on photonic crystal fibers. The difference in the modal field diameters of a conventional single mode fiber and a photonic crystal fiber was used. A variable optical attenuato... 详细信息

关键词： photonic crystal fiber variable optical attenuator single mode fiber

维普期刊数据库