国产精品毛片无遮挡_亚洲欧美日韩综合一区_免费看成人a级毛片_国产第一页屁屁影院
北京理加聯(lián)合科技有限公司

LICA United Technology Limited

服務(wù)熱線(xiàn): 13910499761 010-51292601
企業(yè)郵箱
應用支持 Application Support
News 應用支持

最新LGR穩定性同位素技術(shù)文獻目錄

日期: 2009-07-17
瀏覽次數: 45

?LGR是世界上最知名的激光痕量氣體和穩定性同位素分析儀供貨商。隨著(zhù)OA-ICOS技術(shù)日臻完善,為研究者帶來(lái)了更大的方便,在以往很難測量的領(lǐng)域提供了測量的可能。

????? 因為性能優(yōu)良,數據穩定,越來(lái)越得到用戶(hù)的認可,目前廣泛應用在碳水通量測定,大氣痕量氣體變化的測量,水文同位素研究,CO2/H2O穩定性同位素廓線(xiàn)測量和土壤CH4通量等方向的研究。在近兩年發(fā)表了大量的文獻,現將部分文獻目錄列出,共各位用戶(hù)參考。

???

"High-Frequency Field Deployable Isotope Analyzer for Hydrological Applications"
Manish Gupta, Elena Berman, Chris Gabrielli, Tina Garland, J. McDonnell?
Water Resources Research, 2009 (in press)

"Methane fluxes during the initiation of a large-scale water table manipulation experiment in the Alaskan Arctic tundra"
Zona, D., W. C. Oechel, J. Kochendorfer, K. T. P. U, A.N. Salyuk, P.C. Olivas, S.F. Oberbauer, and D.A. Lipson
Global Biogeochem. Cycles (in press) doi:10.1029/2009GB003487

"Soil and plant contributions to the methane flux balance of a subalpine forest"
D. R. Bowling, J. B. Miller, M. E. Rhodes, S. P. Burns, R. K. Monson, and D. Baer
BGD, 2009, Vol. 6, pp. 4765-4801

"Water vapor 2H and 18O measurements using off-axis integrated cavity output spectroscopy"
P. Sturm, M. Barthel, S. Etzold, and A. Knohl
Geophysical Research Abstracts, Vol. 11, EGU2009-7825-1, 2009

"A groundwater isoscape (δD, δ18O) for Mexico"
L.I. Wassenaar, S.L. Van Wilgenburg, K. Larson, K.A. Hobson
Journal of Geochemical Exploration; doi:10.1016/j.gexplo.2009.01.001

"Large tundra methane burst during onset of freezing"
Mastepanov Mikhail; Sigsgaard Charlotte; Dlugokencky Edward J; Houweling Sander; Str?m Lena; Tamstorf Mikkel P; Christensen Torben R
Nature 2008; 456(7222): 628-30

"Freezing tundra gives off methane"
Torben Christensen
http://environmentalresearchweb.org/cws/article/research/36977

"Water vapor isotopes measurements at Mauna Loa, Hawaii: Comparison of laser spectroscopy and remote sensing with traditional methods, and the need for ongoing monitoring"
Noone, D.; Galewsky, J.; Sharp, Z.; Worden, J.
American Geophysical Union, Fall Meeting 2008, abstract #A23C-0309

"Development and Validation of an Isotopic Water Vapor Analyzer for Rapid Measurements of 18O/16O and D/H in Ambient Air"
Dong, F.; Gupta, M.; Owano, T.; Fellers, R.; Baer, D.
American Geophysical Union, Fall Meeting 2008, abstract #B23C-0447

"High-Precision Laser Spectroscopy D/H and 18O/16O Measurements of Microliter Natural Water Samples"
G. Lis, L. I. Wassenaar, and M. J. Hendry
Anal. Chem., 80 (1), 287-293, 2008

"High Resolution Pore Water δ2H and δ18O Measurements by H2O(liquid)-H2O(vapor) Equilibration"
L.I. Wassenaar, M.J . Hendry, V.L. Chostner, and G.P. Lis
Environmental Science and Technology, 2008, 42 (24), pp 9262–9267

"Development of a rapid on-line acetylene sensor for industrial hydrogenation reactor optimization using off-axis integrated cavity output spectroscopy"
Le, L.D. , Tate, J.D. , Seasholtz, M.B. , Gupta, M., Owano, T., Baer, D., Knittel, T., Cowie, A., Zhu, J.
Applied Spectroscopy, Volume 62, Issue 1, January 2008, Pages 59-65

"A compact and stable eddy covariance set-up for methane measurements using off-axis integrated cavity output spectroscopy"
D. M. D. Hendriks, A. J. Dolman, M. K. van de Molen, and J. van Huissteden
Discussion EGU Atmos. Chem. Phys. Discuss., 7, 11587–11619, 2007

"Can hydrogen isotopic ratios in plant lipids provide a quantitative proxy for aridity?"
Feakins S., Sessions A.
Pacific Climate Workshop
2007 May 13-16; Asilomar State Conference Grounds, Pacific Grove, CA

"Can lipid D/H ratios be a quantitative proxy for aridity?"
Feakins S., Sessions A.
ACS Summer Meeting, 2007 August 19-23, Boston MA

"Memory effects in compound-specific D/H analysis by GC-P-IRMS"
Wang, Y.; Sessions, A. L.
AGU Fall Meeting, 2007 December 10-14, Abstract B13A-0889

"Laser spectroscopic analysis of stable isotopes in natural waters: a low-cost, robust technique for the use of environmental isotopes in hydrological and climate studies"
Aggarwal, P. K.; Ahmad, T.; Groening, M.; Gupta, M.; Owano, T.; Baer, D.
American Geophysical Union, Fall Meeting 2006, abstract #H51D-0504

"Quantitative determination of the Q(1) quadrupole hydrogen absorption in the near infrared via off-axis ICOS"
M. Gupta, T. Owano, D. S. Baer and Anthony O’Keefe
Chemical Physics Letters, Volume 418, Issues 1-3, 25 January 2006, Pages 11-14

"In-Situ Isotope Ratiometer for Hydrothermal Effluent Analysis"
Owano, T.; Gupta, M.; Baer, D.; Provencal, R.; Ricci, K.; OKeefe, A.; Flynn, M.; Holland, P.
American Geophysical Union, Fall Meeting 2005, abstract #OS33C-1495

"Off-axis cavity ringdown spectroscopy: application to atmospheric nitrate radical detection"
James D. Ayers, Randy L. Apodaca, William R. Simpson, and Douglas S. Baer
Applied Optics, Vol. 44, No. 33, 20 November 2005

"Cavity-enhanced quantum-cascade laser-based instrument for carbon monoxide measurements"
R. Provencal, M. Gupta, T. G. Owano, D. S. Baer, K. N. Ricci, A. O'Keefe, and J. R. Podolske
Appl. Opt. 44, 6712-6717 (2005)

"Novel Instrumentation for Atmospheric Measurements of Carbon Dioxide and Stable Isotopes of Carbon Dioxide"
Baer, D.; Gupta, M.; Owano, T.; Ricci, K.; O'Keefe, A.
American Geophysical Union, Fall Meeting 2004, abstract #B23A-0924

"Quantitative Detection of Singlet O2 by Cavity-Enhanced Absorption"
Skip Williams; Manish Gupta; Thomas Owano; Douglas S. Baer; Anthony O’Keefe; David R. Yarkony; Spiridoula Matsika
Optics Letters, Volume 29, Issue 10, pp. 1066-1068 (2004).

"Quantitative determination of singlet oxygen density and temperature for Oxygen-Iodine Laser Applications"
M. Gupta, Thomas Owano, Douglas S. Baer, Anthony O’Keefe and Skip Williams
Chemical Physics Letters, Volume 400, Issues 1-3, 11 December 2004, Pages 42-46

"Multiplex integrated cavity output spectroscopy of cold PAH cations"
Ludovic Biennier, Farid Salama, Manish Gupta and Anthony O'Keefe
Chemical Physics Letters, Volume 387, Issues 4-6, 1 April 2004, Pages 287-294

"Sensitive absorption measurements in the near-infrared region using off-axis integrated-cavity-output spectroscopy"
D.S. Baer, J.B. Paul, M. Gupta, A. O'Keefe
Applied Physics B: Lasers and Optics, Vol. 75, Numbers 2-3, September 2002

"Cavity-enhanced spectroscopy in optical fibers"
M. Gupta, Hong Jiao, and Anthony O'Keefe
Optics Letters, Vol. 27, Issue 21, pp. 1878-1880

"Recent advances in off-axis integrated cavity output spectroscopy"
D.S. Baer, M. Gupta, A. O’Keefe and J. Paul
Diode Lasers and Applications, A. Fried, ed., Proc. SPIE (2002).

"Ultrasensitive Absorption Spectroscopy with a High-Finesse Optical Cavity and Off-Axis Alignment"
Joshua B. Paul, Larry Lapson, and James G. Anderson
Applied Optics, Vol. 40, Issue 27, pp. 4904-4910

"Broadband Ringdown Spectral Photography"
J. J. Scherer, J. B. Paul, H. Jiao, and A. O’Keefe
Appl. Opt. 40, 6725-6732 (2001)

"cw integrated cavity output spectroscopy"
Anthony O’Keefe, James J
Chemical Physics Letters, vol. 307, issue 5-6, pp. 343-349

"Integrated cavity output analysis of ultra-weak absorption"
Anthony O’Keefe
Chemical Physics Letters 293 (5-6), 331-6 (1998).

"Ringdown Spectral Photography"
James J. Scherer
Chemical Physics Letters Volume 292, Issues 1-2, 31 July 1998, Pages 143-153

"Cavity ring down dye laser spectroscopy of jet-cooled metal clusters: Cu2 and Cu3"
A. O’Keefe, J.J. Scherer, A.L. Cooksy, R. Sheeks, J. Heath, and R.J. Saykally
Chemical Physics Letters, vol. 172, pages 215-218, (1990)

"Trace Gas Analysis by Pulsed Laser Absorption Spectroscopy"
Anthony O’Keefe and Olive Lee
American Laboratory, December, 1989

"Cavity ring-down optical spectrometer for absorption measurements using pulsed laser sources"
Anthony O'Keefe and David A.G. Deacon
Review of Scientific Instruments (ISSN 0034-6748), vol. 59, Dec. 1988?


News / 相關(guān)新聞 More
2024 - 06 - 11
摘要土壤有機質(zhì)(SOM)在全球碳循環(huán)中起著(zhù)非常重要的作用,而高光譜遙感已被證明是一種快速估算SOM含量的有前景方法。然而,由于忽略了土壤物理性質(zhì)的光譜響應,SOM預測模型的準確性和時(shí)空可遷移性較差。本研究旨在通過(guò)減少土壤物理性質(zhì)對光譜的耦合作用來(lái)提高SOM預測模型的時(shí)空可遷移性?;谛l星高光譜圖像和土壤物理變量,包括土壤濕度(SM)、土壤表面粗糙度(均方根高度,RMSH)和土壤容重(SBW),建立了基于信息解混方法的土壤光譜校正模型。選取中國東北的兩個(gè)重要糧食產(chǎn)區作為研究區域,以驗證光譜校正模型和SOM含量預測模型的性能和可遷移性。結果表明,基于四階多項式和XG-Boost算法的土壤光譜校正具有優(yōu)異的準確性和泛化能力,幾乎所有波段的殘余預測偏差(RPD)均超過(guò)1.4?;赬G-Boost校正光譜的SOM預測精度最 高,決定系數(R2)為0.76,均方根誤差(RMSE)為5.74 g/kg,...
2024 - 05 - 20
北京,這座擁有千年歷史的城市,見(jiàn)證了無(wú)數歷史的變遷和現代文明的飛躍。然而,隨之而來(lái)的是空氣質(zhì)量問(wèn)題,尤其是由機動(dòng)車(chē)尾氣排放引發(fā)的大氣污染。據相關(guān)研究顯示,機動(dòng)車(chē)尾氣中含有大量的有害物質(zhì),包括一氧化碳、氮氧化物、揮發(fā)性有機化合物以及細顆粒物等,這些污染物不僅對人體健康構成威脅,還會(huì )導致城市霧霾的形成,影響城市的視覺(jué)美感和居民的生活質(zhì)量。在眾多污染物中,氨氣作為一種典型的堿性氣體,其來(lái)源多樣,包括農業(yè)活動(dòng)、工業(yè)生產(chǎn)、生活垃圾處理等。在北京市城區車(chē)輛排放是否是氨氣的主要來(lái)源?據此,來(lái)自中國科學(xué)院大氣物理研究所的研究團隊進(jìn)行了相關(guān)研究。北京城區NH3排放源-機動(dòng)車(chē)尾氣背景介紹氨氣是大氣中重要的堿性氣體,在中和酸性氣體,形成二次氣溶膠方面發(fā)揮著(zhù)重要作用。NH3在大氣中滯留時(shí)間短,因此NH3濃度日變化顯著(zhù)。一般特征為在早上大約07:00~10:00,NH3濃度到達峰值。然而以前的研究局限于單一季節,無(wú)...
2024 - 05 - 17
菱透浮萍綠錦池,夏鶯千囀弄薔薇透過(guò)浮萍,詩(shī)人的眼里看到的是其和水中菱葉相映成趣的景象,是夏日池塘的勃勃生機。而在科研學(xué)者的眼中,看到的是天南星目浮萍科的水生植物,是潛藏在水稻種植中的雙刃劍。營(yíng)養物質(zhì)的爭奪?自然光照的遮擋?生存空間的占據?在一片生機之下,浮萍和水稻之間塑造著(zhù)另一番景象..由于氣候變暖/或灌溉水富營(yíng)養化的影響,稻田中的浮萍(DGP)大幅增加。本研究考慮到生態(tài)因素、光合能力、光譜變化和植物生長(cháng)等因素,對三個(gè)代表性水稻品種進(jìn)行了田間試驗,以確定DGP對水稻產(chǎn)量的影響。結果表明,DGP顯著(zhù)降低pH值0.6,日水溫降低0.6℃,水稻抽穗期提前1.6天,并平均增加了葉片的SPAD和光合速率分別為10.8%和14.4%。DGP還顯著(zhù)提高了RARSc、MTCI、GCI、NDVI705、CI、CIrededge、mND705、SR705、GM等多種植被指數的數值,并且水稻冠層反射光譜的一階導...
2024 - 05 - 08
在城市污水處理與農村生活廢棄物管理中,化糞池作為一種常見(jiàn)的糞便處理設施,承擔著(zhù)重要角色。然而,化糞池在分解過(guò)程中會(huì )產(chǎn)生包括氨氣在內的惡臭氣體,這些氣體不僅對周?chē)h(huán)境造成異味污染,還可能對人體健康構成威脅。以下論文中,來(lái)自上海市環(huán)境科學(xué)研究院的研究團進(jìn)行了化糞池的相關(guān)研究,以降低化糞池氨氣排放對環(huán)境的負面影響,促進(jìn)生態(tài)平衡和可持續發(fā)展,為相關(guān)領(lǐng)域的政策制定和技術(shù)改進(jìn)提供理論依據和實(shí)踐指導。中國城市潛在NH3排放源-化糞池背景介紹在中國高度污染的城市大氣中,大氣新粒子形成可能是由于硫酸和胺的成核機制,而目前尚不清楚為什么中國的城市大氣中富含胺。在城市中,盡管抽水馬桶的普及率接近100%,但人類(lèi)排泄物大多儲存在建筑物下面的化糞池中,而不是直接運往污水處理廠(chǎng)?;S池中大量NH3是微生物分解的產(chǎn)物,可以通過(guò)連接屋頂的塑料管釋放到大氣中。鑒于胺與氨是共同排放的,有理由認為人類(lèi)排泄物也可能是中國城市中胺...
Copyright ?2018-2023 北京理加聯(lián)合科技有限公司
犀牛云提供企業(yè)云服務(wù)

北京理加聯(lián)合科技有限公司

地址:北京市海淀區安寧莊東路18號光華創(chuàng )業(yè)園5號樓(生產(chǎn)研發(fā))
          光華創(chuàng )業(yè)園科研樓四層
電話(huà):13910499761 13910499762 010-51292601
傳真:010-82899770-8014
郵箱:info@li-ca.com
郵編:100085

 

地址:深圳市寶安區創(chuàng )業(yè)二路玖悅雅軒商業(yè)裙樓3層瑞思BEEPLUS 3029室 手機:13910499772

 


 


  • 您的姓名:
  • *
  • 公司名稱(chēng):
  • *
  • 地址:
  • *
  • 電話(huà):
  • *
  • 傳真:
  • *
  • 電子郵箱:
  • *
  • 郵政編碼:
  • *
  • 留言主題:
  • *
  • 詳細說(shuō)明:
  • *
在線(xiàn)留言
關(guān)注我們
  • 官方微信
  • 官方手機端
友情鏈接:
X
1

QQ設置

4

阿里旺旺設置

等待加載動(dòng)態(tài)數據...

等待加載動(dòng)態(tài)數據...

5

電話(huà)號碼管理

  • 010-51292601
6

二維碼管理

等待加載動(dòng)態(tài)數據...

等待加載動(dòng)態(tài)數據...

展開(kāi)
国产精品毛片无遮挡_亚洲欧美日韩综合一区_免费看成人a级毛片_国产第一页屁屁影院