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Reconstituting mammalian spermatogenesis using stem ：ells

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Asian journal of Andrology 2011年第6期13卷 795-796页

作者： Paul j Turek The Turek Clinic San Francisco CA 94133 USA

While stock markets and economies are smoldering all over the world, stem cell science is on fire. The promise of curing many untreatable forms of human male infertility is now one small step closer based on a recent paper in Cell. In this work, scientists from Kyoto University in japan created mature, fertile sperm from embryonic and induced pluripotent stem cells by grabbing the primitive germ cells called primordial germ cells just as they were being made from their pluripotent precursors in vitro and transplanting them back into genetically sterile mice.

关键词： stock markets economies stem cell science

Optimum operation conditions of nitrogen and phosphorus removal by a biofilm-activated-sludge system

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journal of Environmental Sciences 2003年第1期15卷 25-30页

作者： LIUjun－xin j．W．vanGroenestijin ResearchCentreforEco－EnviromentalSciences ChineseAcademyofSciencesBeijing100085China departmentofEnvironmentalBiotechnoloty TNOInstituteofEnviromentalSciencesEnergyReseachandProc

In the biofilm and activated sludge combined system, denitrifying bacteria attached on the fibrous carriers in the anoxic tank, while the sludge containing nitrifying and phosphorus removal bacteria was only recirculated between the aerobic and anaerobic tanks. Therefore, the factors affected and restricted nitrification, denitrification and phosphorus removal in a traditional A/A/O process were resolved. This paper describes the optimum operation conditions for nitrogen and phosphorus removal using this system.

关键词： nitrification denitrification phosphorus removal biofilm activated sludge

Variation of CH_4 concentrations recorded in dunde ice core bubbles

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Chinese Science Bulletin 1999年第4期44卷 383-384页

作者： j. Chappellaz Laboratoire de Glaciologie et Geophysique de I'Environnement Centre National de la Recherche Scientifique

GREENHOUSE gases such as CH4 in the ancient atmospheric concentration can be reconstructed by extracting and analyzing the gases trapped in polar ice core bubbles. It is a new attempt to extract and analyze the CH4 concentration in dunde ice core for the study of mountain glacier. Samples were taken from the about 140-m ice core drilled in 1987 in dunde ice cap in Qilian Mountain. The ice core has been well preserved in cold room. 12 samples were taken from the upper 95 m, and cut to 15 cm in length and 5cm in diameter. CH4 concentrations were measured in CNRS Laboratory of Glaciology, Grenoble, France.

关键词： core Variation of CH4 concentrations recorded in dunde ice core bubbles CH

Comparative analysis of entanglement measures based on monogamy inequality

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Chinese Physics B 2017年第5期26卷 52-59页

作者： P j Geetha Sudha K S Mallesh department of Physics Kuvempu University Shankaraghatta Shimoga-577 451 India Inspire Institute Inc. Alexandria Virginia 22303 USA department of Studies in Physics University of Mysore Mysore-570 006 India

We evaluate the monogamy inequality for symmetric, non-symmetric pure states of importance in terms of squared concurrence, squared entanglement of formation, squared negativity of partial transpose and compare the corresponding tangles. We show that though concurrence and concurrence tangle are zero for two special classes of mixed entangled states, both negativity tangle and entanglement of formation（EOF） tangle turn out to be non-zero. A comparison of different tangles is carried out in each case and it is shown that while the concurrence tangle captures the genuine multiqubit entanglement in N-qubit pure states with N distinct spinors（containing GHZ and superposition of W-, obverse W states）either negativity tangle or EOF tangle is to be used as a better measure of entanglement in the W-class of states with two distinct spinors and in the special classes of mixed multiqubit states.

关键词： entanglement tangle negativity superposition inequality entangled symmetric vanishing squared arbitrary

Stakeholder orientated sustainable land management:The Ruhr Area as a role model for urban areas

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International journal of Mining Science and Technology 2013年第5期23卷 659-663页

作者： jürgen Kretschmann University of Applied Sciences TFH Georg Agricola

The concept of sustainable land management(SLM)can help create a balance between the different demands of economy,society and *** means to actively develop land based on a knowledgebased *** should aim on long term *** basis of SLM is the interests and the goals of the *** is the result of a bargaining process between different institutions by creating win-win-situations or adequate conflict solutions to reach a *** Ruhr Area is Germany’s biggest metropolitan *** management regarding economic,social and environmental issues,which has a long tradition in this area,goes back to *** the centre of the heavy industry in Germany for more than 150 years,the Ruhr Area today is a green *** ecological,social and economical change of this industrial region can serve as a role model for SLM in urban areas all over the world.

关键词： Land management Sustainability Mining heritage Ruhr Area

Characterization of Magnetron Sputter CN_(x) Thin Films

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Chinese Physics Letters 1998年第2期15卷 120-122页

作者： ZHENG Wei-tao j.E.Sundgren department of Materials Science Jilin UniversityChangchun 130023 department of Physics Linkoping UniversityS-58183 LinkopingSweden

Carbon nitride thin films were deposited at different substrate temperature(ST)by using reactive magnetron sputtering in a pure N_(2) discharge,and studied by laser Raman spectroscopy,x-ray photoelectron spectroscopy(XPS),and spectroscopic *** Raman spectra of the films show that I(d)/I(G)decreased with the increase of *** d bandposition shifted towards lower frequency,while the G bandposition shifted towards higher frequency as the ST *** XPS data exhibit that Nls binding states also depend on *** optical band gap of the films is found dropped from 0.22eV to 0.10eV with the increase of ST.

关键词： shifted films spectroscopic

An old emperor finds new clothing： rejuvenation in our time

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Asian journal of Andrology 2011年第1期13卷 125-129页

作者： david j Handelsman ANZAC Research Institute Sydney NSW 2139Australia

Those who don＇t understand their history are condemned to repeat it （Santayana） History repeats itself, first as tragedy and then as farce （Marx）

关键词： emperor finds rejuvenation

Field observations of putative bone-based fluorescence in a gecko

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Current Zoology 2018年第3期64卷 319-320页

作者： john j, SLOGGETT Maastricht Science Programme Maastricht University P.O. Box 616 6200 MD Maastricht The Netherlands

A diversity of animals are biofluorescent, absorbing shortwavelength electromagnetic radiation, and re-emitting it at longer wavelengths, giving a distinctive pattern （Lagorio et al. 2015）. Among terrestrial organisms, biofluorescence has been commonly recorded in arthropods, but rarely from vertebrates （Lagorio et al. 2015）. It has long been known from parrots （Hausmann et al. 2003） and has recently been recorded from a frog （Taboada et al. 2017） and from chameleons （Chamaeleonidae： Protzel et al. 2018）.

关键词： biofluorescence bone Chondrodactylus bibronii Gekkonidae signaling Squarnata

Preclinical and clinical studies on cancer-associated cachexia

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Frontiers in Biology 2018年第1期13卷 11-18页

作者： d. Brooke Widner d. Clark Files Kathryn E. Weaver Yusuke Shiozawa department of Cancer Biology and Comprehensive Cancer Center Wake Forest School of Medicine Winston-Salem NC 27157 USA Internal Medicine-Sections inPulmonaryand Critical Care Medicine and Geriatrics and the Critical Illness Injury and Recovery Research Center Wake Forest School of Medicine W~nston-Salem NC 27157 USA department of Social Sciences and Health Policy and Comprehensive Cancer Center of Wake Forest University Wake Forest School of Medicine Wtnston-Salem NC 27157 USA

BACKGROUNd： Cancer cachexia is the wasting condition that is often seen in advanced stage cancer patients. This wasting is largely attributable to a systemic and progressive loss of skeletal muscle mass that greatly hinders performance of normal daily activities, resulting in reduced quality of life. Moreover, it negatively influences the prognosis of cancer patients. A general consensus in the field is that the loss of muscle mass is due both to an increase in protein degradation and a decrease in protein synthesis. Recent studies using preclinical models for studying cachexia have been useful in identifying the contribution of inflammatory cytokines （e.g. tumor necrosis factor-a and Interleukin-6）, and myostatin receptors （e.g. the type IIB activin receptor） to cachexia development, and have led to several clinical trials. However, many questions remain about the molecular mechanisms thought to play a role in the development of cachexia. METHOdS： We conducted a literature search using search engines, such as PubMed and Google Scholar to identify publications within the cancer cachexia field. RESULTS- We summarized our current knowledge of： 1） the driving mechanisms of cancer cachexia, 2） the preclinical models available for studying the condition, and 3） the findings of recent clinical trials. CONCLUSION： Cancer cachexia is a complex and variable condition that currently has no standard effective therapeutic treatment. Further studies are desperately needed to better understand this condition and develop effective combination treatments for patients.

关键词： cancer cachexia muscle wasting bodyweight loss metabolic changes increased protein degradation decreased protein synthesis