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Effects of Barium Stress in Brassica juncea and cakile maritima:The Indicator Role of Some Antioxidant Enzymes and Secondary Metabolites

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Phyton-International Journal of Experimental Botany 2021年第1期90卷 145-158页

作者： Houda Bouslimi Renata Ferreira Nesrine Dridi Pedro Brito Susete Martins-Dias isa.el ca.a.or Noomene Sleimi Laboratory of Resources Materials and EcosystemsFaculty of Sciences of BizerteUniversity of CarthageJarzounaBizerte7021Tunisia Centro de Recursos Naturais e Ambiente Instituto Superior TécnicoUniversidade de LisboaLisbon1049-001Portugal Instituto Português do Mare da Atmosfera Rua Dr.Alfredo Magalhães RamalhoLisbon1495-006Portugal Centro de Recursos Naturais e Ambiente DBEInstituto Superior TécnicoUniversidade de LisboaLisbon1049-001Portugal Marine and Environmental Sciences Centre Faculdade de CiênciasUniversidade de LisboaCampo GrandeLisbon1749-016Portugal

Soil contamination by toxic trace metal elements,like barium(Ba),may stimulate various undesirable changes in the metabolic activity of *** plant responses are fast and with,direct or indirect,generation of reactive oxygen species(ROS).To cope with the stress imposed by the ROS production,plants developed a dual cellular system composed of enzymatic and non-enzymatic players that convert ROS,and their by-products,into stable nontoxic *** assess the Ba stress response of two Brassicaceae species(Brassica juncea,a glycophyte,and cakile maritime,a halophyte),plants were exposure to different Ba concentrations(0,100,200,300 and 500µM).The plants response was evaluated through their morphology and development,the determination of plant leaves antioxidant enzymatic activities and by the production of plants secondary *** indicated that the two Brassicaceae species have the ability to survive in an environment containing Ba(even at 500µM).The biomass production of *** was slightly affected whereas an increase in biomass *** was *** stress imposed by Ba activated the antioxidant defense system in the two species,noticed by the changes in the leaves activity of catalase(caT),ascorbate peroxidase(APX)and guaicol peroxidase(GPX),and of the secondary metabolites,through the production of total phenols and *** enzymatic response was not similar within the two plant species:caT and APX seem to have a more important role against the oxidative stress in *** while in *** is ***,total phenols and flavonoids production was more significant in the plants aerial part than in the roots,of the both *** the two Brassicaceae species response was different,in both plants catalytic and non-catalytic transformation of ROS occurs,and both were able to overcome the Ba toxicity and prevent the cell damage.

关键词： Brassica juncea cakile maritima antioxidant enzymes barium stress oxidative stress secondary metabolites

Measurement of Thermal Expansion Coefficients with Holographic Technique

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Journal of Thermal Science 1995年第1期4卷 67-74页

作者： Zhifeng Zhang(Department of Mechanical and Environmental Engineering, University of california at Santa Barbara, ca93106, USA) Department of Mechanical and Environmental Engineering University of California at Santa Barbara USA

A simplified mathematical model was created for measurement of thermal expansion coefficients of thinsheet materials with holographic technique. Experimental set-ups corresponding to the mathematicalmodel were designed and built for both tests above room temperature and at low temperatures. Afringe control technique was introduced for low temperature measurements to compensate rigid bodymovement. Thin sheet specimens of silicon and aluminum alloy (7075) were tested with the developedtechnique. The tested results are in good agreement with reported data and thus verify the validityof the developed technique. The thermal expansion coefficients of the tested materials ranged from2.5×10-6C-1 to 23.6×0-60C-1.

关键词： thermal expansion holographic measurement low temperature tests deformation tests.

Multi‑Functional Fibrous Dressings for Burn Injury Treatment with Pain and Swelling Relief and Scarless Wound Healing

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Advanced Fiber Materials 2023年第6期5卷 1963-1985页

作者： Zhengchao Yuan Yue Zhao Muhammad Shafiq Jiahui Song Jing Hou Yuqing Liang Xiao Yu Yujie Chen Fan Yu Mohamed el‑Newehy Hany el‑Hamshary Yosry Morsi Shichao Jiang Hui Zheng Xiumei Mo State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Shanghai Engineering Research Center of Nano‑Biomaterials and Regenerative MedicineCollege of Biological Science and Medical EngineeringDonghua UniversityShanghai 201620People’s Republic of China Department of Chemical Engineering Faculty of EngineeringGraduate SchoolKyushu UniversityFukuoka 819‑0395Japan United Graduate School of Drug Discovery and Medical Information Sciences Gifu University1‑1 YanagidoGifu 501‑1193Japan Department of Orthopedics Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinan 250021People’s Republic of China Department of Chemistry College of ScienceKing Saud UniversityP.O.Box 245511451 RiyadhSaudi Arabia Faculty of Engineering and Industrial Sciences Swinburne University of TechnologyBoroondaraVIC 3122Australia Medical Science and Technology Innovation Center Shandong First Medical University&Shandong Academy of Medical SciencesJinan 250117People’s Republic of China Department of Thoracic Surgery Shanghai Pulmonary HospitalTongji University School of MedicineShanghai 200443People’s Republic of China

As one of the most common forms of skin injuries,skin burns are often accompanied by edema pain,suppuration of infection,slow tissue regeneration,and severe scar formation,which significantly delay wound healing as well as affect the quality of *** prepared multifunctional electrospun poly(L-lactide-co-glycolide)/gelatin(P/G)-based dressings to synergistically harness the therapeutic benefits of peppermint essential oil(T),burn ointment(B),and Oregano essential oil(O)(P/G@TBO)for skin regeneration in punch and burn injury *** P/G@TBO can afford the sustained release of bioactive cues for up to 72 h as well as remarkably promote cell migration(ca.P/G@TBO,89%*** group,51%)at 24 *** P/G@TBO membranes also showed significant angiogenic effect as well as antibacterial and anti-inflammatory properties than that of the control group in ***,P/G@TBO dressings enabled fast wound healing(ca.P/G@TBO,100%wound closure *** group,95%)in a full-thickness excisional defect model up to 14 days in *** evaluation of membranes in different animal models,including tail wagging model,facial itch model,and hot burn injury model showed significant pain relieve effect as well as itching and swelling relief functions during earlier stages of wound *** were next transplanted into a scalded wound model in rats and an ear punch wound model in rabbits,which manifested antibacterial and anti-inflammatory properties and promoted re-epithelialization to achieve scarless wound healing percentage wound closure at day 28:P/G@TBO,96%*** group 66%.Taken together our approach of simultaneously harnessing T,B,and O to enable multifunctionality to fibrous dressings may hold great promise for burn wound healing applications and other related disciplines.

关键词： Burn injury Wound healing Skin regeneration Pain and swelling relief Nanofiber membrane

Recent Progress in Polymer Solar Cells at UCLA

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Recent Progress in Polymer Solar Cells at UCLA

INITIATION OF SEDIMENT MOTION INLAMINAR OVERLAND FLOW

全国第八届有机固体电子过程暨华人有机光电功能材料学术讨论会

作者： Yang Yang~(a,*),Gang Li~(b,*) (a Department of Materials Science and Engineering,UCLA,Los Angeles,ca 90095 USA) (b Solarmer Energy Inc.,el Monte,ca 91731 USA)

Polymer solar cell has been an intensively studied area in organic electronics field in the last decades,with tremendous progress in solar cell performance *** this talk,recent progress at UCLA will be presented,including understanding and control of bulk hetero-junction(BHJ) morphology,development of both active and interfacial materials,transparent electrode etc.

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International Journal of Sediment Research 1999年第2期14卷 325-332页

作者： Gary LI (Department of Geography & Environmental Studies california State University Hayward, ca 94542.USA)

Due to its extremely shallow in depth, the overland flow hydraulics is affected by surface roughness. raindrop impact, and in the case of laminar flow, fluid viscosity. The initiation of sediment in overland flow is subsequently influenced by these factors and differs greatly from that in river flows. This study is to investigate, by means of flume experiments, the effects of stone roughness, raindrops and fluid viscosity on the initiation of sediment motion in laminar overland flow. It was found that the critical dimensionless shear stress in laminar overland flow is much smaller when surface roughness and rainfall are present than when they are not. Surface roughness and rainfall generate disturbances in the flow which entrain otherwise immobile sediment. As a result, the threshold of motion in laminar flow on a rough surface with rainfall is similar to that in turbulent flow. It was found that critical flow power in laminar flow on rough surfaces in positively correlated with fluid viscosity and negatively correlated with rainfall intensity and surface roughness.

关键词： Overland flow Surface roughness Raindrop impact Initiation of sediment. Critical dimensionless shear stress

Matrix metalloproteinases and their expression in mammary gland

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Cell Research 1998年第3期8卷 187-194页

作者： URIA JOSE A ZENA WERB(Department of Anatomy, University of california San Francisco, ca 94143-0452, USA) Department of Anatomy University of California San Francisco CA USA

The matrix metalloproteinases (MMPs) are a family of zinc-dependent endopeptidases that play a key role in both normal and pathological processes involving tissue remodeling events. The expression of these proteolytic enzymes is highly regulated by a balance between extracellular matrix (ECM) deposition and its degradation, and is controlled by growth factors, cytokines, hormones, as well as interactions with the ECM macromolecules. Furthermore, the activity of the MMPs is regulated by their natural endogenous inhibitors, which are members of the tissue inhibitor of metalloproteinases (TIMP) family. In the normal mammary gland, MMPs are expressed during ductal development, lobulo-alveolar development in pregnancy and involution after lactation. Under pathological conditions, such as tumorigenesis, the dysregulated expression of MMPs play a role in tumor initiation, progression and malignant conversion as well as facilitating invasion and motastasis of malignant cells through degradation of the ECM and basement membranes. Matrix metalloproteinases and their expression in mammary gland

关键词： Matrix metalloproteinases ECM cancer progression mammary gland

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适合于动态世界的设计哲学

自然辩证法研究 1994年第12期10卷 43-57页

作者：范岱年胡克,ca 澳大利亚新堡大学哲学系

适合于动态世界的设计哲学（澳大利亚）Ｃ．Ａ．胡克（Ｈｏｏｋｅｒ）著范岱年译本文的意图是要为系统地思考公共政策提供一个指导性的框架。由于篇幅的限制，本文只提供一些想法的概要（进一步研究可参见附录１）。从这个一般性的框架... 详细信息

适合于动态世界的设计哲学（澳大利亚）Ｃ．Ａ．胡克（Ｈｏｏｋｅｒ）著范岱年译本文的意图是要为系统地思考公共政策提供一个指导性的框架。由于篇幅的限制，本文只提供一些想法的概要（进一步研究可参见附录１）。从这个一般性的框架到制定适合于具体时间、地点的政策的...

关键词：自然辩证法动态世界设计哲学

Sexual Behaviour and Contraceptive Usage of Secondary School Adolescents in Ibadan, Nigeria

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Journal of Reproduction and Contraception 2007年第4期18卷 279-288页

作者： A Oladokun IO Morhason-Bello ca Enakpene KM Owonikoko JO Akinyemi KA Obisesan Department of Obstetrics & Gynaecology University College Hospital Ibadan Nigeria Department of Epidemiology Medical Statistics and Environmental Health College of Medicine University of Ibadan Nigeria

Objective To determine the prevalence and pattern of sexual activity as well as the contraceptive practices among the selected secondary school adolescents in Ibadan, Nigeria. Methods A descriptive cross-sectional study was conducted among the selected senior secondary school students in Ibadan, following a stratified multistage random sampling technique. Results There were 695 respondents out of which the females constituted 51% and the males were 49%. Less than one third （28.3%） of the respondents have had previous sexual exposure at the time of the study. The median age of sexual debut among the sexually exposed was 15 years in both the males and the females. Bivariate analysis of sociodemographic characteristics of respondents with previous sexual exposure showed that, sex, religion, father＇s and mother＇s educational background and level of class were statistically significant（P〈0. 001）. Further analysis using logistic regression model revealed that male respondents were 3 times more likely than females （95% CI 1.92-4.56） to have had sexual experience while those whose mother had tertiary educational background were less likely to have had previous sexual experience compared with those with secondary and lower educational background （OR= 1.76, 95% CI 1.11-2.77）. Of all the sociodemographic characteristics of respondents considered with the age of sexual partners using bivariate analysis showed that only level of class was significant （P=0. 018）. Less than half of the sexually active males （44.2%） were using various methods of contraception, while 54.4% of the sexually active females were using different types of modern methods.Conclusion It is quite obvious that risky sexual behaviours are in practice among the secondary school students studied and by extension in the country. It therefore means that reproductive health issues especially concerning the adolescents will have to be openly discussed by all with our youths while abstinence/chastity should be

关键词： adolescents sexual health contraceptive usage

Sol-gel synthesis,properties and protein loading/delivery capacity of hollow bioactive glass nanospheres with large hollow cavity and mesoporous shell

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Frontiers of Materials Science 2022年第3期16卷 145-157页

作者： Ahmed el-FIQI Glass Research Department National Research CentreCairo 12622Egypt

Hollow nanospheres exhibit unique properties and find a wide interest in several potential applications such as drug ***,novel hollow bioactive glass nanospheres(HBGn)with large hollow cavity and large mesopores in their outer shells were synthesized by a simple and facile one-pot ultrasound assisted sol-gel method using PEG as the core ***,the produced HBGn exhibited large hollow cavity with ~43 nm in diameter and mesoporous shell of ~37 nm in thickness and 7 nm pore size along with nanosphere size around 117 *** confirmed the presence of Si and ca elements at the surface of the HBGn outer ***,HBGn showed high protein loading capacity(~570 mg of Cyto c per 1 g of HBGn)in addition to controlled protein release over 5 *** also demonstrated a good in vitro capability of releasing calcium(ca^(2+):170 ppm)and silicate(SiO_(4)^(4-):78 ppm)ions in an aqueous medium over 2 weeks under physiological-like *** in vitro growth of bone-like hydroxyapatite nanocrystals was exhibited by HBGn during the soaking in SBF.A possible underlying mechanism involving the formation of spherical aggregates(coils)of PEG was proposed for the formation process of HBGn.

关键词： bioactive glass hollow nanosphere hollow cavity mesoporous shell soft-template ultrasound assisted sol-gel synthesis therapeutic protein delivery