检索结果-南通市图书馆

Chinese Physics Letters 2004年第6期21卷 1187-1188页

作者： t.d.Lee Physicsdepartment ColumbiaUniversityNewYorkNY10027USA

We discuss the possibility that the existence of dark energy may be due to the presence of a spin zero field (x), either elementary or composite. In the presence of other matter field, the transformation (x)→(x)+ constant can generate a negative pressure, like the cosmological constant. In this picture, our universe can be thought as a very large bag, similar to the much smaller MIt bag model for a single nucleon.

关键词： Astrophysics

Nonlinear thermo-mechanical stability of eccentrically stiffened functionally graded material sandwich doubly curved shallow shells with general sigmoid law and power law according to third-order shear deformation theory

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Applied Mathematics and Mechanics(English Edition) 2017年第2期38卷 191-216页

作者： d.V.dUNG d.t.d.NG Faculty of Mathematics Mechanics and Informatics Vietnam National University Hanoi 100000 Vietnam Faculty of Civil Engineering University of Transport Technology Hanoi 100000 Vietnam

In this paper, the nonlinear analysis of stability of functionally graded ma- terial （FGM） sandwich doubly curved shallow shells is st.d.ed under thermo-mechanical loads with material properties obeying the general sigmoid law and power law of four ma- terial models. Shells are reinforced by the FGM stiffeners and rest on elastic foundations. theoretical formulations are derived by the third-order shear deformation theory （t.d.） with the von Karman-type nonlinearity taking into account the initial geometrical im- perfection and smeared stiffener technique. the explicit expressions for determining the critical buckling load and the post-buckling mechanical and thermal load-deflection curves are obtained by the Galerkin method. two iterative algorithms are present.d. the effects of the stiffeners, the thermal element, the distribution law of material, the initial imper- fection, the foundation, and the geometrical parameters on buckling and post-buckling of shells are investigat.d.

关键词： functionally graded material (FGM) sandwich double curved shallow shell,thermo-mechanical stability FGM stiffener elastic foundation

云南秋海棠挥发物抗微生物活性的研究(英文)

在线全文

学校读者我要写书评

暂无评论

云南植物研究 2005年第4期27卷 437-442页

作者：管开云 Fershalova t.d. tsybulya N.V. 田代科中国科学院昆明植物研究所云南昆明650204 俄罗斯科学院西伯利亚中央植物园新西伯利亚630090

对云南产的16种秋海棠属(BegoniaL.)植物进行了挥发物抗微生物活性实验,其中14种秋海棠为首次报道。结果表明,在所研究的16种秋海棠中,有8种秋海棠具有抗葡萄球菌(Staphyllococcusepidermidis)活性。而抗大肠杆菌(Escherichiacoli)活性... 详细信息

对云南产的16种秋海棠属(BegoniaL.)植物进行了挥发物抗微生物活性实验,其中14种秋海棠为首次报道。结果表明,在所研究的16种秋海棠中,有8种秋海棠具有抗葡萄球菌(Staphyllococcusepidermidis)活性。而抗大肠杆菌(Escherichiacoli)活性最强的是厚壁秋海棠(***),假厚叶秋海棠(***)和秋海棠(***.)。只有铁甲秋海棠(***.)和毛叶秋海棠(***.)对白假丝酵母菌(Candidaalbicans)有抗性。作为室内盆栽花卉被广泛应用的秋海棠,不仅可以美化室内环境,而且还可以作为药用和净化室内环境的生态产品进行推广应用。

关键词：秋海棠抗微生物活性

Evidence-Based Complementary and Alternative Medicine Effects of Capybara Oil on Cardiac Remodeling of C57bl/6 Mice

在线全文

学校读者我要写书评

暂无评论

Journal of Biosciences and Medicines 2024年第5期12卷 213-232页

作者： Rafael M. Almeida Wagner d. Giannetti Guilherme R. Silveira Carolina R. Castilho Renata V. Lisboa Bianca t. Ciambarella Rodrigo N. Ferreira Jorge José de Carvalho Laboratory of Ultrastructure and tissue Biology Institute of Biology State University of Rio de Janeiro Rio de Janeiro Brazil Higher Education Center of Valenç a Dom Andr&#233 Arcoverde Educational Foundation Valen&#231a Brazil

Cardiovascular diseases are the main cause of morbidity and mortality in the world, and obesity and the metabolic syndrome are risk factors for its development. One of the therapies to reduce cardiovascular risk is the use of polyunsaturat.d.fatty acids. In Brazil, a source of such acid is the oil extract.d.from the fat of the capybara. the objective of this work is to st.d. the effects of the capybara oil on lipid and glucose metabolism, as well as its effects on the adipose tissue and cardiac remodeling. We assessed the effects of capybara oil treatment on body mass, lipid and carbohydrate metabolism, systolic blood pressure, adipose tissue and cardiac remodeling, and performed an ultrastructural evaluation of the myocardium in C57Bl/6 mice treat.d.with high-fat.d.et. treatment with capybara oil reduced total cholesterol and triglyceride levels, systolic blood pressure, visceral and subcutaneous adipose tissue, and adipocyte diameter. In addition, cardiac remodeling was attenuat.d. preserving cardiomyocytes, increasing vascularization, reducing cardiomyocyte hypertrophy and the extracellular matrix, and preserving the morphological integrity of mitochondria. Capybara oil has several beneficial effects on the cardiovascular and metabolic system, and further st.d.es are needed to better understand its role in the prevention or treatment of cardiovascular diseases.

关键词： Capybara Oil Cardiac Remodeling Polyunsaturat.d.Fatty Acids Obesity Metabolic Syndrome

Effects of low molecular weight polysaccharide from Sargassum thunbergii against palmitic acid-induced intracellular lipid accumulation in 3t3-L1 adipocyte and HepG2 cells

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Food Science and Human Wellness 2024年第4期13卷 2244-2252页

作者： Hyo-Geun Lee d.P.Nagahawatta M.J.M.S.Kurera Kyung-Mo Song Yun-Sang Choi You-Jin Jeon Min-Cheol Kang department of Marine Life Sciences Jeju National UniversityJeju 63243Republic of Korea department of Biotechnology Faculty of Agriculture and Plantation ManagementWayamba University of Sri LankaMakanduraGonawila(NWP)60170Sri Lanka Research Group of Food Processing Korea Food Research Institute245Wanju 55365Republic of Korea

Low molecular weight polysaccharides can be isolat.d.from Sargassum thunbergii(LMPSt)and in vitro experiments were conduct.d.to evaluate the inhibitory effects on *** natures of LMPSt were attained from *** and appraised their LMPSt on palmitic acid(PA)induced lipid accretion in Hep G2,and 3t3-L1 *** treatment lessened lipid deposition and intracellular free fatty acid and triglyceride intensities in PA-treat.d.above mentioned *** mechanistic st.d. publicized that LMPSt2 significantly suppressed adipogenesis and stimulat.d.the PA-treat.d.3t3-L1 cells occupied in the lipolysis ***,in PA-treat.d.Hep G2 cells,the free fatty acid oxidation was significantly increased by *** these constructive properties of LMPSt2 from ***,is a potential candidate for diminishing the intracellular lipids,and for a therapeutic agent in those conditions.

关键词： Sargassum thunbergii Low molecular weight polysaccharide Lipid accumulation Obesity Liver steatosis

Volatile organic compounds emitt.d.by Megaplatypus mutatus associat.d.fungi: chemical identification and temperature-modulat.d.responses by the ambrosial beetle

在线全文

学校读者我要写书评

暂无评论

Ecological Processes 2024年第2期 3-15页

作者： Esteban d.Ceriani-Nakamurakare Mariel Slodowicz Cecilia Carmarán Paola Gonzalez-Audino Instituto de Micología y Botánica (INMi Bo) Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET ) departamento de Ingeniería Agrícola y Uso de la tierra Facultad de Agronomía Universidad de Buenos Aires (UBA) Centro de Investigaciones de Plagas e Insecticidas (CIPEIN) Unidad de Investigación y Desarrollo Estratégico Para la Defensa (UNIDEF) Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET ) departamento de Biodiversidad y Biología Experimental (dBBE) Facultad de Ciencias Exactas y Naturales (FCEy N) Universidad de Buenos Aires (UBA)

Background In ambrosia and bark beetles–fungi interaction, volatile organic compounds(VOCs) play a central role in mediating various aspects of community dynamics of beetles and/or fungi. these functions include facilitating beetle habitat location, mate identification, and fungal partner differentiation. However, the understanding on this context remains limit.d. especially in the globally distribut.d.subfamily Platypodinae, which comprises predomi-nantly ambrosia beetles. there is a lack of chemical data on ambrosia fungi from native South American species. this st.d. addresses this gap by characterizing VOCs from twelve fungal species associat.d.with Megaplatypus mutatus and assessing species-specific behavioral responses during *** Fungal VOCs were collect.d.by gas chromatography–mass spectrometry combined with solid-phase microextraction and Y-olfactometry assays of males and females were performed at.d.spersal stage. Statistical analyses involved: non-metric mult.d.mensional scaling multivariate plot and PERMANOVA test, a cluster analysis through unweight.d.pair group method with Jaccard index, and finally, a chi-square goodness-of-fit test for beetle behavioral *** We identified 72 VOCs from the fungal species isolat.d.from M. mutatus galleries, exocuticle, and gut. the olfactory behavior of M. mutatus demonstrat.d.its capacity to discriminate between volatile profiles, showing a pref-erence for either the fungus or the control source. Our results also enhance the understanding in a chemotaxonomic context and in the behavioral responses of M. mutatus revealing the beetle's remarkable low temperature toler-ance and its capability to maintain mobility and orientation toward volatile sources even after zero-degree Celsius *** this st.d. presents a comprehensive insight into fungal VOC profiles, emphasizing the sources of isola-tion within pest associat.d.fungi, as well as its symbiotic species from the Raffaelea genus. In

关键词：

determinants of Knowledge, Attit.d.s, and Practices among Young Adults type 2 diabetes Patients in Select.d.tertiary Hospitals in Shandong Province, China

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Journal of Clinical and Nursing Research 2024年第4期8卷 253-263页

作者： Yao Liu Cyrelle d.Agunod Graduate School Angeles University FoundationAngeles City 2009Philippines

Objective: the purpose of this st.d. is to understand the current situation of knowledge, attit.d., and practice of self-management in young patients with type 2 diabetes mellitus (t.d.) and to explore the relationship between general conditions (personal, social, and environment, clinical factors) and their knowledge, attit.d., and practices (KAP) of diabetes self-management, this aims to provide patients with high-quality nursing care management and services, as well as to provide relevant recommendations for effective self-management. Methods: this st.d. is a descriptive correlational st.d. that used the purposive sampling method to investigate 359 patients with t.d. aged 18-25 years in four designat.d.tertiary hospitals in Shandong Province. Results: Knowledge of self-management was correlat.d.with sex, age, education level, occupation and work situation, monthly household income, medical payment method, family and friend support, frequency of diabetes health education, and diabetes complications. the attit.d. subscale was correlat.d.with sex, age, education level, work situation, and family and friend support. the practice subscale was associat.d.with age, education level, work situation, family and friend support, frequency of diabetes health education, and HbA1c values. Conclusion: Young adults aged 18-25 with t.d. have positive attit.d.s towards diabetes self-management, but there are still deficiencies in knowledge acquisition and behavioral practice. the KAP of self-management of diabetes is influenced by personal factors such as sex, age, and education level, and socio-environmental factors such as family income and family or friends’ social support. Additionally, clinical factors such as complications and HbA1c values significantly impact.d.the patient’s disease self-management ability.

关键词： determinants type 2 diabetes mellitus Young adults Knowledge,attit.d.s,and practices(KAP)

Parallelization of frequency domain quantum gates:manipulation and distribution of frequency-entangled photon pairs generat.d.by a 21 GHz silicon microresonator

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advanced Photonics 2024年第3期6卷 60-69页

作者： Antoine Henry dario A.Fioretto Lorenzo M.Procopio Stéphane Monfray Frédéric Boeuf Laurent Vivien Eric Cassan Carlos Alonzo-Ramos Kamel Bencheikh Isabelle Zaquine Nadia Belabas Institut Polytechnique de Paris LTCITélécom ParisPalaiseauFrance Université Paris-Saclay CNRSCentre for Nanosciences and NanotechnologyUMR 9001PalaiseauFrance Weizmann Institute of Science RehovotIsrael StMicroelectronics SAS CrollesFrance

Harnessing the frequency dimension in integrat.d.photonics offers key advantages in terms of scalability,noise resilience,parallelization,and compatibility with telecom multiplexing *** ring resonators have been used to generate frequency-entangled states through spontaneous four-wave ***,state-of-the-art integrat.d.resonators are limit.d.by trade-offs among size,spectral separation,and efficient photon pair *** have developed silicon ring resonators with a footprint below 0.05 mm^(2)providing more than 70 frequency channels separat.d.by 21 *** exploit the narrow frequency separation to parallelize and independently control 34 single qubit-gates with a single set of three off-the-shelf electro-optic *** fully characterize 17 frequency-bin maximally entangled qubit pairs by performing quantum state *** demonstrate for the first time,we believe,a fully connect.d.five-user quantum network in the frequency *** results are a step towards a generation of quantum circuits implement.d.with scalable silicon photonics technology,for applications in quantum computing and secure communications.

关键词： integrat.d.photonics frequency domain quantum gates quantum networks

d-type neuropept.d. decorat.d.AIEgen/RENP hybrid nanoprobes with light.d.iven ROS generation ability for NIR-Ⅱ fluorescence imaging-guided through-skull phot.d.namic therapy of gliomas

在线全文

学校读者我要写书评

暂无评论

Aggregate

Aggregate 2024年第1期5卷 185-195页

作者： Xuelu He Yuan Luo Yanying Li Yuanbo Pan Ryan t.K.Kwok Lulu He Xiaolin duan Pengfei Zhang Aiguo Wu Ben Zhong tang Juan Li Ningbo Key Laboratory of Biomedical Imaging Probe Materials and technology Zhejiang International Cooperation Base of Biomedical Materials Technology and ApplicationChinese Academy of Sciences(CAS)Key Laboratory of Magnetic Materials and DevicesNingbo Cixi Institute of Biomedical EngineeringZhejiang Engineering Research Center for Biomedical MaterialsNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingboP.R.China Guangdong Key Laboratory of Nanomedicine Shenzhen Engineering Laboratory of Nanomedicine and NanoformulationsCAS-HK Joint Lab for BiomaterialsResearch Laboratory for Biomedical Optics and Molecular ImagingShenzhen Key Laboratory for Molecular ImagingCAS Key Lab for Health InformaticsShenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhenP.R.China department of Chemistry Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction and Institute for Advanced StudyThe Hong Kong University of Science and Technology(HKUST)KowloonP.R.China School of Science and Engineering Shenzhen Institute of Aggregate Science and TechnologyThe Chinese University of Hong KongShenzhenP.R.China

Glioma is one of the most common malignant tumors of the central nervous system,leading high mortality rates in ***-induced emission(AIE)photosensitizers-based phot.d.namic therapy(Pdt)has emerged as a promising therapeutic strategy for least-invasive treatment of glioma,which involves local irradiation of the tumor using an external near-infrared(NIR)***,most AIE photosensitizers suffered from poorly penetration of the visible light excitation,bad spatiotemporal resolution in deep tissues and low efficient blood-brain barrier(BBB)crossing ability,which greatly limit.d.the clinical practice of AIE photosensitizers for especially deep-seat.d.brain tumor *** this work,we developed a multifunctional NIR-driven theranostic agent through hybrid of AIE photosensitizers tINd with rare-earth doping nanoparticles(RENPs)NaGdF4:Nd/Yb/tm with up/down dual-mode conversion *** theranostic agent was further decorat.d.with d-type neuropept.d. dNPY for crossing BBB and targeting *** the 808-nm light irradiation,the down-conversion NIR-II luminescence could indicate the position glioma and the upconversion NIR-I luminescence could trigger the AIE photosensitizers producing reactive oxygen species to inhibit orthotopic glioma tumor growth in *** results demonstrate that the integration of dtype neuropept.d.,AIE photosensitizers and RENPs could be promising candidates for in vivo NIR-II fluorescence image-guided through-skull Pdt treatments of brain tumors.

关键词： aggregation-induced emission d-type neuropept.d. glioma phot.d.namic therapy rare-earth doping nanoparticles