Inter- and intraindividual correlations of background abundances of 2H, 18O and 17O in human urine and implications for DLW measurements科學(xué)家應(yīng)用LGR同位素分析儀測(cè)定人體尿液中的2H,18O和17O豐度間的相互作用對(duì)DLW測(cè)量方法的影響E S F Berman, E L Melanson, T Swibas, S P Snaith and J R SpeakmanBackground/Objectives:The method of choice for measuring total energy expenditure in free-living individuals is the doubly labeled water (DLW) method. This experiment examined the behavior of natural background isotope abundance fluctuations within and between individuals over time to assess possible methods of accounting for varia...
發(fā)布時(shí)間:
2015
-
07
-
01
瀏覽次數(shù)：37
科學(xué)家應(yīng)用Campbell CPEC200閉路渦動(dòng)相關(guān)系統(tǒng)測(cè)量森林碳封存Canada: Forest Carbon SequestrationCampbell Scientific CPEC200 monitors eddy-covariance fluxes in British Columbia forest 文章下載地址：79canada-vancouver-island--CPEC200.pdf4da92e4cbee3e5c7273825cef11d6136.pdf (2.84 MB)
發(fā)布時(shí)間:
2015
-
05
-
19
瀏覽次數(shù)：49
Field Spectroscopy in the VNIR-SWIR Region to Discriminate between Mediterranean Native Plants and Exotic-Invasive Shrubs Based on Leaf Tannin Content 基于可見光近紅外（VNIR）和短波紅外（SWIR），科學(xué)家應(yīng)用ASD地物光譜儀測(cè)量葉片單寧的含量，從而區(qū)分地中海附近海岸的本土植物和外來入侵灌木。Authors: Jan Rudolf Karl Lehmann, André Große-Stoltenberg, Meike Römer and Jens OldelandAbstract: The invasive shrub, Acacia longifolia, native to southeastern Australia, has a negative impact on vegetation and ecosystem functioning in Portuguese dune ecosystems. In order to spectrally discriminate A. longifoliafrom oth...
發(fā)布時(shí)間:
2015
-
05
-
12
瀏覽次數(shù)：123
科學(xué)家應(yīng)用LGR氨氣分析儀快速原位機(jī)載測(cè)量空氣中氨氣的含量Fast in situ Airborne Measurement of AmmoniaUsing a Mid-Infrared Off-Axis ICOS Spectrometer科學(xué)家應(yīng)用LGR氨氣分析儀快速原位機(jī)載測(cè)量空氣中氨氣的含量，這可以幫助我們更好的分析大氣的成分和氣溶膠的組成，具有深遠(yuǎn)的意義。J. Brian Leen,?,* Xiao-Ying Yu,?,* Manish Gupta,? Douglas S. Baer,? John M. Hubbe,? Celine D.Kluzek, ? Jason M. Tomlinson,? and Mike R. Hubbell II??Los Gatos Research Inc., 67 E. Evelyn Ave, Suite 3, Mountain View, CA 94041?Pacific Northwest National Laboratory, 902 Battelle Boulevard, Richland, WA 99352ABSTRACT:A new ammonia (NH3) analyzer was developed based on off-axis integrated cavity output spectroscopy...
發(fā)布時(shí)間:
2015
-
03
-
17
瀏覽次數(shù)：50
The relative role of soil type and tree cover on water storageand transmission in northern headwater catchments科學(xué)家應(yīng)用LGR液態(tài)水同位素分析儀在北部水源集中區(qū)域監(jiān)測(cè)土壤類型與植被覆蓋類型對(duì)水的存儲(chǔ)和傳輸?shù)挠绊慗osie Geris,1* Doerthe Tetzlaff,1 Jeffrey McDonnell1,2 and Chris Soulsby11 Northern Rivers Institute, School of Geosciences, University of Aberdeen, Scotland, UK2 Global Institute for Water Security, National Hydrology Research Centre, University of Saskatchewan, Saskatoon, Canada Abstract:Soil water storage and stable isotopes dynamics were investigated in dominant soil–vegetation assemblages of a wet nor...
發(fā)布時(shí)間:
2015
-
02
-
26
瀏覽次數(shù)：48
科學(xué)家應(yīng)用LGR液態(tài)水同位素分析儀做同位素示蹤研究，研究證明，重碳酸鹽的修正可以提高被鈾污染的含水層的生物還原修復(fù)能力。Bicarbonate impact on U(VI) bioreduction in a shallow alluvial aquiferPhilip E. Longa , Kenneth H. Williamsa, James A. Davisa, Patricia M. Foxa, Michael J. Wilkinsb, 1,Steven B. Yabusakib, Yilin Fangb, Scott R. Waichlerb, Elena S.F. Bermanc, Manish Guptac, Darrell P. Chandlerd, Chris Murrayb, Aaron D. Peacocke, Ludovic Giloteauxf, Kim M. Handleyg, 2, Derek R. Lovleyh,Jillian F. Banfieldg a Lawrence Berkeley National Laboratory, Ber...
發(fā)布時(shí)間:
2015
-
02
-
04
瀏覽次數(shù)：35
Direct Analysis of δ2H and δ18O in Natural and Enriched Human Urine Using Laser-Based, Off-Axis Integrated Cavity Output Spectroscopy應(yīng)用LGR液態(tài)水穩(wěn)定同位素分析儀測(cè)量尿液中的氫氧同位素 Elena S. F. Berman *?, Susan L. Fortson ?, Steven P. Snaith ?, Manish Gupta ?, Douglas S. Baer ?,Isabelle Chery ?, Stephane Blanc ?, Edward L. Melanson §, Peter J. Thomson ⊥, and John R. Speakman ⊥∥? Los Gatos Research, 67 East Evelyn Ave, Suite 3, Mountain View California 94043, United States? Department of Ecology, Physiology...
發(fā)布時(shí)間:
2015
-
01
-
27
瀏覽次數(shù)：82
LGR的專利技術(shù)—利用腔增強(qiáng)激光吸收光譜法，記錄高吸收光譜，能夠精確的測(cè)量葡萄酒中的同位素比值。LGR擁有專業(yè)的光譜污染標(biāo)識(shí)軟件（軟件測(cè)量植物水的精確數(shù)據(jù)在權(quán)威期刊上發(fā)表過），這使得儀器可以測(cè)量葡萄酒中的甲醇和乙醇污染物，從而得到可靠的同位素比值數(shù)據(jù)。 Laser-based measurements of 18O/16O stable isotope ratios (δ18O) in wine samples應(yīng)用LGR液態(tài)水穩(wěn)定同位素分析儀測(cè)量葡萄酒中的穩(wěn)定同位素比值18O/16O和δ18O Manish Gupta1 J Brian Leen1 Elena Simone Franklin Berman1 Aldo Ciambotti21Los Gatos Research, Mountain View, CA, USA;2Consiglio per la Ricerca e la Sperimentazione in Agricoltura, Centro di Ricerca per l’Enologia, Asti, Italy Abstract: Wine counterfeiting is an international, m...
發(fā)布時(shí)間:
2015
-
01
-
27
瀏覽次數(shù)：45
LGR 二氧化碳同位素分析儀最新應(yīng)用：應(yīng)用LGR二氧化碳同位素分析儀，通過測(cè)定腸易激綜合癥患者的呼出氣體中的13CO2和12CO2的同位素分子比率，可以對(duì)患者體內(nèi)小腸細(xì)菌過度生長(zhǎng)情況做出正確診斷Diagnosis of small intestinal bacterial overgrowth in irritable bowel syndrome patients using high-precision stable 13CO2/12CO2 isotope ratios in exhaled breath Gourab D. Banik,a Abhijit Maity,a Suman Som,a Chiranjit Ghosh,a Sunil B. Daschakraborty,b Sujit Chaudhuri,b Shibendu Ghoshc and Manik Pradhan*ad Hydrogen breath tests (HBT) are widely used for the d...
發(fā)布時(shí)間:
2015
-
01
-
22
瀏覽次數(shù)：52
Short-term e?ects of thinning, clear-cutting and stump harvesting on methane exchange in a boreal forest關(guān)于人類對(duì)北方森林的疏伐、濫砍濫伐和樹樁采伐對(duì)甲烷交換的短期影響 E. Sundqvist1, P. Vestin1, P. Crill2, T. Persson3, and A. Lindroth1 1Department of Physical Geography and Ecosystem Science, Lund University, Sweden 2Department of Geological Sciences, Stockholm University, Sweden 3Department of Ecology, Swedish University of Agricultural Sciences, Sweden原文鏈接：http://www.biogeosciences-discuss.net/11/4637/2014/bgd-11-4637-2014.pdf
發(fā)布時(shí)間:
2015
-
01
-
05
瀏覽次數(shù)：53