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重庆与世界 2007年第10期 38-41页

作者： david w.evans 国家地理电视台

曾在伦敦、华盛顿等地从事艺术指导,图片总监的工作,在国家地理电视台担任创意总监,并在世界范围内做品牌推广。曾在美国,墨西哥,古巴,南美洲和中美洲等地摄影,并刊登在世界各地的刊物和商业报告上。

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Efficacy of nonsolvent flower pollen extracts in healthy women with urinary incontinence:A randomized,double-blind,placebo-controlled,parallel study

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Current Urology 2024年第3期18卷 203-211页

作者： Marc Moulin Erin D.Lewis david C.Crowley Colleen E.May Malkanthi evans KGK Science Inc. LondonOntarioCanada Graminex L.L.C.SaginawMIUSA

Background Urinary incontinence(UI)is a debilitating and common condition that adversely affects quality of *** and surgical approaches for managing UI symptoms may result in undesirable risks and *** randomized,double-blind,placebo-controlled,parallel study investigated the efficacy of 2 nonsolvent flower pollen extracts on UI in healthy *** and methods One-hundred and fourteen women aged 40–75 years who scored≥5 on the International Consultation on Incontinence Questionnaire-Urinary Incontinence Short Form(ICIQ-SF)were randomized to receive either Graminex®RCT Fem™UI,Graminex®PollenBerry®,or placebo for 24 *** primary outcome was the change in the ICIQ-SF score between the trial and placebo groups after 24 weeks of *** secondary outcomes included changes in the frequency of nocturia(recorded in 3-day void diaries)and 24-hour leakage volume(assessed via pad weight)after 6,12,18,and 24 weeks of supplementation and changes in stress-induced urinary leakage volume(after completion of a provocative maneuver challenge)after 24 weeks of *** All the groups demonstrated improvement in ICIQ-SF scores at week 24(pwed by the PollenBerry®group(−3.34±2.87)and placebo group(−2.61±3.52).The RCT Fem™UI group had corresponding improvements in 24-hour leakage volume(−17.68±39.84 g)and frequency of nocturia(−0.52±1.26)(p≤0.05).PollenBerry®supplementation significantly improved stress-induced urinary leakage volume(−7.12±15.64 g)at week *** study products demonstrated safe hematological and chemical *** RCT Fem™UI supplementation resulted in significant and clinically meaningful reductions in UI severity,with corresponding improvements in daily urinary leakage volume and frequency of ***®significantly improved stress-induced urinary leakage volume,suggesting that it may be eff

关键词： Urinary incontinence Pollen extract Healthy women Dietary supplement ICIQ-SF Urinary leakage

Study on the supramolecular structure of sorbic acid inter-calated Zn-Al layered double hydroxides and its thermal decomposition

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Chinese Science Bulletin 2005年第22期50卷 2575-2581页

作者： david G. evans Ministry of Education Key Laboratory of Science and Technology of Controllable Chemical Reactions Beijing University of Chemical Tech- nology Beijing 100029 China

A novel organic-inorganic composite, sorbic acid intercalated zinc aluminum layered double hydroxides (SA-ZnAl-LDHs) has been successfully assembled by a sim- ple direct coprecipitation method. A holistic approach in- cluding normal XRD, FT-IR, and UV-Vis measurements and simultaneous TG/DTA/MS and in situ HT-XRD techniques was employed to explore the supramolecular intercalation structure and the thermal decomposition properties of as-synthesized SA-ZnAl-LDHs material.

关键词：氢氧化铝超分子结构热量分解插入结构 HT-XRD 有机化合物

Preparation and photochromic properties of NiAl-NO_3-LDHs/LDPE composite

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Chinese Science Bulletin 2007年第7期52卷 877-882页

作者： CHO Kyuhaeng david G.evans State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology

Nanoscale NiAl-NO3-LDHs with good crystallinity have been synthesized by a method, Separate Nucleation and Aging Steps (SNAS). An NiAl-NO3-LDHs/LDPE composite was prepared by blending NiAl-NO3-LDHs and LDPE in a heated double-roller mixer. The color of this composite changed from olive green to steel gray under UV irradiation. After heating at 80oC for 2 h, the color returned to olive green. The effect of varying the amount of added NiAl-NO3-LDHs and UV exposure time on the photochromic properties of the composite has been investigated. The results showed that the photochromic phenomenon becomes more apparent with increasing amount of NiAl-NO3-LDHs. when the amount reaches 5%, the composite exhibits good photochromic properties and reproducibility. The color change rate of the composite reaches a maximum when the irradiation time exceeds 20 min. The addition of LDPE improves the photochromic cyclability of NiAl-NO3-LDHs significantly. The addition of nanoscale NiAl-NO3-LDHs also improves the mechanical properties of LDPE to some extent.

关键词： NiAl-NO3-LDHs 低密度聚乙烯纳米级复合物合成对光反应变色结晶度

Layer-by-layer assembly of long-afterglow self-supporting thin films with dual-stimuli-responsive phosphorescence and antiforgery applications

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Nano Research 2017年第10期10卷 3606-3617页

作者： Rui Gao Dongpeng Yan david G. evans Xue Duan State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology Beijing 100029 China Beijing Key Laboratory of Energy Conversion and Storage Materials College of Chemistry Beijing Normal University Beijing 100875 China

The assembly of thin films （TFs） having long-lasting luminescence can be expected to play an important role in the development of new-generation smart sensors, anti-counterfeiting materials, and information-encryption systems. However, such films are limited compared with their powder and solution counterparts. In this study, by exploiting the self-organization of phosphors in the two-dimensional （2D） galleries between clay nanosheets, we developed a method for the ordered assembly of long-afterglow TFs by utilizing a hydrogen-bonding layer-by-layer （LBL） process. Compared with the pristine powder, the TFs exhibit high polarization and up-conversion room-temperature phosphorescence （RTP）, as well as enhanced quantum yields and luminescence lifetimes, allowing them to be used as room-temperature phosphorescent sensors for humidity and oxygen. Moreover, modified clay-based hybrids with multicolor RTP can serve as anti-counterfeiting marks and triple-mode 2D barcode displays. we anticipate that the LBL assembly process can be extended to the fabrication of other inorganic--organic room-temperature phosphorescent hybrids with smart luminescent sensor and antiforgery applications.

关键词： layer-by-layer self-supporting thin film two-dimensional (2D) ultrathin nanosheets sensor phosphorescence

david evans:摄影和纪录片都很重要

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读者欣赏 2013年第6期 72-79页

作者：江西 david evans

在美国国家地理频道的发展史上,有一个人特别重要,那就是曾担任创意总监达6年之久的davidevans。这位摄影师兼纪录片制片人,凭借卓越的专业水平和全球化视野,在短短的几年时间,完成了美国国家地理频道的全球化布局。

关键词： david evans 美国国家地理全球化视野盖茨基金会创意总监文化环境《今日美国》视频资料蜡画图像制作

Advancing beyond May 1971: How Do we Deal with the Possibility of Complicated Dyke Geometries, Long-Lived Lips, and Contrasting Basement Geological Provinces?

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Acta Geologica Sinica(English Edition) 2016年第S1期90卷 31-33页

作者： david A.D.evans Dep't.of Geology & Geophysics Yale University

The iconic image of a giant radiating dyke swarm subsequently fragmented into three pieces via supercontinental breakup was produced by Paul May in1971(see next page).That figure presented a large part of

关键词： and Contrasting Basement Geological Provinces Long-Lived Lips Advancing beyond May 1971 How Do we Deal with the Possibility of Complicated Dyke Geometries

The evolution of lower extremity reconstruction

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Plastic and Aesthetic Research 2022年第1期9卷 182-195页

作者： Brogan G.A.evans david L.Colen Division of Plastic and Reconstructive Surgery Department of SurgeryYale School of MedicineNew HavenCT 06510USA

Reconstruction of the lower extremity is a complex task that has evolved greatly in both technique and indication over the past *** advances in treating traumatic lower extremity injuries focused on primary amputation to avoid the high mortality of *** introduction of antibiotics improved surgical debridement and local reconstructive options,enhancing the viability of lower extremities with simple and proximal *** the advent of microvascular surgery,free tissue transfer techniques provided a means to reconstruct more distal and complex *** these surgical techniques have continued to evolve,so too have indications for reconstruction,patient management and post-operative care-now with a greater emphasis on patient quality of life and limb *** purpose of this article is to outline the evolution of lower extremity reconstruction,and how the standard of practice has changed over time.

关键词： Lower extremity lower extremity reconstruction limb salvage free flap perforator flap vascularized bone flap orthoplastic surgery

Education programs for people living with chronic pain:a scoping review

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Frontiers of Nursing 2020年第4期7卷 307-319页

作者： Hai-Ying wang Carol Grech david evans Rasika Jayasekara Family Health Golden Grove 205 The Golden WayGolden GroveSouth Australia 5125Australia School of Nursing&Midwifery University of South AustraliaAustralia

Objective:The aim of this scoping review was to provide evidence for health practitioners to improve patient education practice for chronic pain ***:A scoping review was guided by Arksey and O’Malley’s(2005)1 five-stage framework,investigated contemporary patient education programs(2007–2018)for chronic pain management in education content,formats of delivery,and tools used for *** analysis and description were used for the outcome ***:Seven quantitative studies were *** content consisted of General information,Cognitive behavior therapy(CBT),Self-management,and Pain neurophysiology(PN).Education delivery formats varied from workbook to workbook,face-toface,online,when given for a group or individual or in a combined *** total,19 tools were reported for the evaluation of the education ***:There is a variety in the education content and the delivery *** majority of programs showed effectiveness in patients’chronic pain management based on their selected evaluation *** review showed that patient education programs can be useful in chronic pain *** effectiveness of patient education programs focuses on the improved patients’physical function and quality of life rather than the cessation of pain only.

关键词： patient education chronic pain management scoping review taxonomy pain patient education

Multi-dimensional, light-controlled switch of fluorescence resonance energy transfer based on orderly assembly of 0D dye@micro-micelles and 2D ultrathin-layered nanosheets

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Nano Research 2016年第12期9卷 3828-3838页

作者： Zhixiong Li Ruizheng Liang Simin Xu wendi Liu Dongpeng Yan Min wei david G. evans Xue Duan State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology Beijing 100029 China

Fluorescence resonance energy transfer （FRET） systems have broad applications in visual detection, intelligent materials, and biological imaging, all of which favor the transmission of light through multiple dimensions and in diverse directions. Herein, we have demonstrated multi-dimensional （0D and 2D） FRET within a multi-layer ultrathin film （UTF） by employing a layer-by-layer （LBL） assembly technique. The anionic block copolymer micelle poly（tert-butyl acrylate- co-ethyl acrylate-co-methacrylic acid）（PTBEM） is chosen as a molecular carrier for the incorporation of bis（8-hydroxyquinolate） zinc （Znq2） and open-ring merocyanine （MC）（denoted as （Znq2/MC）@PTBEM）. Alternatively, electrostatic assembly is performed with cationic layered double hydroxide （LDH） nanosheets （denoted as [（Znq2/MC）@PTBEM/LDH]n）. This [（Znq2/MC）@PTBEM/ LDH]n system offers a multi-dimensional propagation medium and ensures that the FRET donor and acceptor are located within their F6rster radii in each direction. The system demonstrates a FRET process that can be switched via alternating ultraviolet/visible （UV/vis） irradiation, with tunable blue-green/red fluorescence, resulting in a FRET efficiency as high as 81.7%. It is expected that this assembly method, which uses 0D micelles on a 2D layered material, can be extended to other systems for further development of multi-dimensional FRET.

关键词： bis(8-hydroxyquinolate)zinc (Znq2) open-ring merocyanine layered double hydroxide layer-by-layerself-assembly multi-dimensionalfluorescence resonanceenergy transfer