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Solvent Extraction in Hydrometallurgy: Present and Future

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Tsinghua Science and Technology 2006年第2期11卷 137-152页

作者： gordon M. Ritcey G. M. Ritcey and Associates Inc. Ottawa Canada

During the past 10 years, there have been incremental advances in the application of solvent extraction to process hydrometallurgy. The most cited areas in the literature include chemistry, chemical engineering, pilot plants, and plant operation. Within these areas, there were considerable interest in synergism, diluents, degradation, contactors, surfactants, hydrometallurgical applications, environmental and secondary applications, and health and safety. The summary to the present is followed by a prediction for the future in the above areas of interest. These include the use of speciation; improved understanding of the role of surfactants on the system; optimization through modelling, pilot plants, and contactor selection; improvements in plant operation; further new applications; and plant safety. The review has indicated that considerable knowledge is now available to optimize and improve on process design and plant applications.

关键词： chemical engineering coalescence degradation diluents dispersion droplet size electrostaticpseudoliquid membrane environmental and secondary recovery hydrometallurgical applications

Conserved RB functions in development and tumor suppression

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Protein & Cell 2011年第11期2卷 864-878页

作者： Gabriel M.gordon Wei Du Ben May Department for Cancer Research University of ChicagoChicagoIL 60637USA

The variety of human cancers in which the retinoblastoma protein pRb is inactivated reflects both its broad importance for tumor suppression and its multitude of cellular *** evidence indicates that pRb contributes to a diversity of cellular functions,including cell proliferation,differentiation,cell death,and genome *** performs these diverse functions through the formation of large complexes that include E2F transcription factors and chromatin *** this review we will discuss some of the recent advances made in understanding the structure and function of pRb as they relate to tumor suppression,and highlight research using Drosophila melanogaster that reveals important,evolutionarily conserved functions of the RB family.

关键词： RB E2F Drosophila Rbf cell cycle chromatin modification

Flexible ultra-thin super-resolution endoscopy

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Science China(Physics,Mechanics & Astronomy) 2024年第3期67卷 171-172页

作者： George S.D.gordon Department of Electrical and Electronic Engineering University of NottinghamNottingham NG7 2RDUK

In recent years, multimode fiber(MMF) has become an important tool for high-resolution endoscopic imaging in narrow channels(e.g., in the brain via needles or inside blood vessels) due to its high mode density and fine diameter, typically <0.125 mm [1-6]. However, a major obstacle to widespread deployment in applications is that realistic perturbations, including bending, twisting and changes in temperature, cause unacceptable image degradation.

关键词： fiber resolution typically

A cost-effective, simple and high-throughput method for DNA extraction from insects

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Insect Science 2010年第5期17卷 465-470页

作者： Malgorzata Lagisz gordon Port Kirsten Wolff School of Biology Newcastle University Newcastle upon Tyne UK

We present a high-throughput cost-effective method to extract DNA suitable for polymerase chain reaction （PCR） from insect tissue. The method uses standard 200μL- deep 96-well plates in which samples are ground, digested and subsequently purified. The test extraction using four different insect species and controlling for potential contamination showed that the method yields good-quantity and quality DNA. PCR with mitochondrial and nuclear primers was reliable. The proposed extraction protocol combines the speed of commercial 96-well plate methods with the economies associated with readily available and cheap laboratory chemicals, consumables and equipment. Therefore, this method is particularly suitable for low-budget research projects and for laboratories with only basic equipment present.

关键词： DNA extraction genetic isolation molecular technique

Fluorescence Enhancement Ratio Dropdown at Low Fluences during Femtosecond Double Pulse Laser Ablation

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Chinese Physics Letters 2008年第7期25卷 2653-2656页

作者： Sima SINGHA Robert J. gordon 胡湛 Institute of Atomic and Molecular Physics Jilin University Changchun 130021 Department of Chemistry University of Illinois at Chicago Chicago Illinois 60607-7061 USA

In the study of double pulse ablation of materials （silicon and copper）, a dropdown of double pulse to single pulse fluorescence signal enhancement at low fluences is observed. The dropdown is analysed with a simple theoretical one-dimensional heat diffusion model and verified by fluorescence time constants change as a function of fluence. The dropdown is explained as a result of liquid-solid mixture layer at the liquid and solid boundary. The effect of the layer becomes important at low fluences.

关键词： the power-law exponents precipitation durative abrupt precipitation change

Apoer2/Lrp8:the undercover cop of synaptic homeostasis

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Neural Regeneration Research 2024年第12期19卷 2563-2564页

作者： gordon C.Werthmann Joachim Herz Department of Molecular Genetics and Center for Translational Neurodegeneration Research University of Texas Southwestern Medical Center at DallasDallasTXUSA Department of Neuroscience Department of Neurology University of Texas Southwestern Medical Center at Dallas DallasTXUSA

Apolipoprotein E receptor 2(ApoER2)is a receptor for the protein ApoE,the most common genetic risk factor for late-onset Alzheimer's disease(AD).It is also a key modulator of syna ptic homeostasis,in part through its effect on the expression of neuronal genes including those implicated in AD and other neuropsychiatric *** this perspective,we highlight several genes affected by ApoER2 and its alternatively spliced forms and how aberrant expression can be rescued by the reintroduction of the ApoER2 intracellular domain in the mouse hippocampus.

关键词： homeostasis ApoE Alzheimer

Transient thermal analysis as measurement method for IC package structural integrity

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Chinese Physics B 2015年第6期24卷 47-64页

作者： Alexander Han Maximilian Schmid E Liu gordon Elger Technische Hochschule Ingolstadt

Practices of IC package reliability testing are reviewed briefly, and the application of transient thermal analysis is examined in great depth. For the design of light sources based on light emitting diode （LED） efficient and accurate reliability testing is required to realize the potential lifetimes of 105 h. Transient thermal analysis is a standard method to determine the transient thermal impedance of semiconductor devices, e.g. power electronics and LEDs. The temperature of the semiconductor junctions is assessed by time-resolved measurement of their forward voltage （Vf）. The thermal path in the IC package is resolved by the transient technique in the time domain. This enables analyzing the structural integrity of the semiconductor package. However, to evaluate thermal resistance, one must also measure the dissipated energy of the device （i.e., the thermal load） and the k-factor. This is time consuming, and measurement errors reduce the accuracy. To overcome these limitations, an innovative approach, the relative thermal resistance method, was developed to reduce the measurement effort, increase accuracy and enable automatic data evaluation. This new way of evaluating data simplifies the thermal transient analysis by eliminating measurement of the k-factor and thermal load, i.e. measurement of the lumen flux for LEDs, by normalizing the transient Vf data. This is especially advantageous for reliability testing where changes in the thermal path, like cracks and delaminations, can be determined without measuring the k-factor and thermal load. Different failure modes can be separated in the time domain. The sensitivity of the method is demonstrated by its application to high- power white InGaN LEDs. For detailed analysis and identification of the failure mode of the LED packages, the transient signals are simulated by time-resolved finite element （FE） simulations. Using the new approach, the transient thermal analysis is enhanced to a powerful tool for reliability

关键词： transient thermal analysis thermal resistance reliability light emitting diode

Status of semen analysis comment on “A survey on the status of semen analysis in 118 laboratories in China” by Jin-Chun Lu et al. in Asian Journal of Andrology

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Asian Journal of Andrology 2010年第1期12卷 115-117页

作者： Hugh William gordon Baker Department of Obstetrics and Gynaecology University of Melbourne and Melbourne IVF Reproductive Services TheRoyal Women＇s Hospital Parkville 3052 Victoria Australia

The paper by Lu et al. [1] ＂A survey on the status of semen analysis in 118 laboratories in China＂ provides a major review of the current methods of semen analysis in China's Mainland. It involved a 36-item questionnaire completed by technicians in 118 of a possible 145 potential semen laboratories. Recruitment for the study was via contacts developed at Chinese Andrology meetings and training sessions between 2005 and 2007. It is not stated how comprehensive this strategy would be for accessing all semen laboratories in China. About half the participating laboratories were in general hospitals and the others in hospitals with academic affiliations or family planning institutes.

关键词： no english key word

Why so little effort to study anti-oxidant therapy in burns?

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Burns & Trauma 2016年第3期4卷 167-168页

作者： gordon L.Klein Department of Orthopaedic Surgery and Rehabilitation University of Texas Medical Branch and Shriners Burns Hospital301 University BoulevardGalvestonTX 77555-0165USA

Given that oxidative stress is an inherent response to burn injury,it is puzzling as to why investigation into anti-oxidant therapy as an adjunct to burn treatment has been *** the inflammatory response and the stress response to burn injury involve oxidative stress,and there has been some limited success in studies using gamma tocopherol and selenium to improve certain consequences of *** remains to be done to investigate the number,doses and combinations of anti-oxidants,their efficacy,and limitations in improving defined outcomes after burn injury.

关键词： Anti-oxidant Burn Oxidative stress