Estimation of Tasuj aquifer response to main meteorological parameter variations under Shared Socioeconomic Pathways scenarios     

Ghazi  Babak  Jeihouni  Esmaeil  Kisi  Ozgur  Pham  Quoc Bao  Đurin  Bojan 《Theoretical and Applied Climatology》2022,149(1-2):25-37

Theoretical and Applied Climatology - In this study, statistical and soft-computing methods are compared in forecasting groundwater levels under Shared Socioeconomic Pathways (SSPs) SSP1-2.6,...  相似文献   

Conjugation of 4-hydroxynonenal by largemouth bass (Micropterus salmoides) glutathione S-transferases     

Pham RT  Gardner JL  Gallagher EP 《Marine environmental research》2002,54(3-5):291-295

The glutathione S-transferases (GST) are a major group of conjugative enzymes involved in the detoxification of electrophilic compounds and products of oxidative stress. We have previously described the kinetics of hepatic GST conjugation in largemouth bass using a variety of synthetic GST reference substrates. In the present study, we investigated the ability of largemouth bass hepatic GSTs to conjugate 4-hydroxynon-2-enal (4HNE), a mutagenic and cytotoxic alpha-beta-unsaturated aldehyde produced during oxidative injury. Hepatic cytosolic fractions from largemouth bass rapidly catalyzed GSH-dependent 4HNE conjugation, with the rate of GST-4HNE conjugation in bass liver exceeding those of several other mammalian and aquatic species. No apparent sex-related differences in GST-4HNE activity were observed among adult bass. SDS-PAGE and Western blotting analysis of GSH affinity-purified bass liver cytosolic GST revealed the presence of two major GST subunits of approximately 30 and 27 KDa that exhibited slight cross-reactivity when probed with a rat alpha class GST antibody, but not to rat mu, pi or theta class GST. The rapid conjugation of 4HNE by hepatic GST suggests an important role for GSTs in protecting against peroxidation of polyunsaturated fatty acids in bass liver.  相似文献   

Evaluation of a 256×256 Si:As IBC detector array for astronomy     

M. E. McKelvey  Robert E. McMurray Jr.  C. R. Mccreight  W. J. Forrest  J. D. Garnett  N. Lum  J. Asbrock  R. White  R. Kelchner  L. Lum  L. Pham 《Experimental Astronomy》1994,3(1-4):167-168

256×256-element IBC Si:As arrays have been evaluated for applications in IR astronomy from space-borne platforms. Basic figures of merit were measured at IR flux levels simulating those expected in space-based astronomical observations. Results include dark current <20e ^-/s, G as high as 3.8, / of 20%, and read noise below 100 rms e^-.  相似文献   

Long-wavelength infrared technology for astronomy at the Hughes Technology Center     

L. Pham  N. Lum  J. Asbrock  J. Venzon  R. Kelchner 《Experimental Astronomy》1994,3(1-4):227-234

The Hughes Technology Center (HTC) has developed a family of high-performance Si:As impurity-band conduction (IBC) hybrid focal plane arrays (FPAs) optimized for low background applications: 58×62 pixels (76-m pitch), 128×128 pixels (75- and 120-m pitch), and 256×256 pixels (30-m pitch). These FPAs exhibit state-of-the-art low noise (<100e ^-) achieved by using readout arrays fabricated on HTC's CryoCMOS process line. The IBC detector arrays, also fabricated at HTC, exhibit high quantum efficiency over a wide waveband with operating temperature of 4–12 K. In addition, Hughes is developing a 256×256 Si:As IBC FPA for high background applications as well as a 512×512 FPA. Readout development includes design and fabrication of 256×256 readouts with large well size of 1×10⁷ e ^- for the high-background FPA and 512×512 readouts with moderate well size (1×10⁶ e ^-).  相似文献   

A New Species of Amsassia from the Ordovician of Korea and South China: Paleobiological and Paleogeographical Significance     

Mirinae Lee  Heeju Park  Nguyen Viet Tien  Suk-Joo Choh  Robert J. Elias  Dong-Jin Lee 《《地质学报》英文版》2016,90(3):796-806

A new species of the probable calcareous alga Amsassia, A. koreanensis, is recognized from the Duwibong Formation (Middle Ordovician, Darriwilian) of the Taebaeksan Basin in mid-eastern Korea. This is the first report of the genus from the Korean Peninsula, expanding its geographical range to the eastern Sino-Korean Block. The new species also occurs in the Xiazhen Formation (Upper Ordovician, Katian) at Zhuzhai in the South China Block. Amsassia koreanensis is the smallest species of this modular genus, having a maximum module diameter of 0.28 mm. Module increase is by bipartite, tripartite and quadripartite types of longitudinal axial fission, but unlike other species of the genus, quadripartite fission is common. The types of fission are comparable to those in some Tetradiida (now Prismostylales, florideophycean rhodophyte algae), although the processes of fission are different. The distribution of A. koreanensis further strengthens the biogeographical connection between the Sino-Korean and South China blocks, suggesting that these two paleocontinents were located closer together during the Middle to Late Ordovician than previously speculated.  相似文献   

Arsenic mobilisation in a new well field for drinking water production along the Red River,Nam Du,Hanoi     

Jenny Norrman  Charlotte J. Sparrenbom  Michael Berg  Dang Duc Nhan  Pham Quy Nhan  Håkan Rosqvist  Gunnar Jacks  Emma Sigvardsson  David Baric  Johanna Moreskog  Peter Harms-Ringdahl  Nguyen Van Hoan 《Applied Geochemistry》2008

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地质资料数字化的作用及推进数字化工作的途径          下载免费PDF全文

李婕  沃恒怒 《江苏地质》2008,32(4):340-342

阐述了数字化是当前地质档案管理的发展趋势,提出了应加快实现档案数字化网络建设及地质资料管理数字化建设目标。  相似文献   

REDD+ politics in the media: a case from Nepal     

Dil B. Khatri  Thuy Thu Pham  Monica Di Gregorio  Rahul Karki  Naya S. Paudel  Maria Brockhaus  Ramesh Bhushal 《Climatic change》2016,138(1-2):309-323

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The Sin Quyen Cu–Fe–Au–REE deposit (northern Vietnam): composition and formation conditions     

I.V. Gas’kov  Tran Tuan Anh  Tran Trong Hoa  Pham Thi Dung  P.A. Nevol’ko  Pham Ngoc Can 《Russian Geology and Geophysics》2012,53(5):442-456

The Sin Quyen Cu–Fe–Au–REE deposit is localized in the Proterozoic deposits of the Phan Xi Pang zone, northern Vietnam. The mineralization is formed by lenticular and sheet-like bodies occurring concordantly with the host rocks. Seventeen orebodies have been recognized in the deposit, which form an ore horizon up to 140 m in total thickness, about 2 km in strike, and up to 350 m in dip. The ores are of simple mineral composition: Au-rich copper and iron sulfides (chalcopyrite, pyrite, pyrrhotite) and iron oxides (magnetite, hematite). Gold and silver are distributed unevenly in the ores: Their contents vary from hundredths and tenths of ppm to 1.8 ppm. Copper sulfide ores are the main concentrator of gold and silver. All ores are characterized by high REE contents, tens and hundreds of times exceeding the element clarkes. The highest contents have been revealed for Ce and La. Orthite is the main carrier of REE. No correlation between REE and ore elements of sulfide-oxide ores has been revealed, which points to the independent formation of the mineralization. Orebodies together with the host rocks underwent metamorphism at 500–600 to 630–685 °C and 3–7 kbar. The spatial association of the mineralization with amphibolites (metamorphosed basites) and the mineral composition of ores suggest that the Sin Quyen deposit is of Cyprian volcanogenic type.  相似文献   

Three-dimensional hydrostratigraphical modelling to support evaluation of recharge and saltwater intrusion in a coastal groundwater system in Vietnam     

Vu Thanh Tam  Okke Batelaan  Tran Thanh Le  Pham Quy Nhan 《Hydrogeology Journal》2014,22(8):1749-1762

Saltwater intrusion is generally related to seawater-level rise or induced intrusion due to excessive groundwater extraction in coastal aquifers. However, the hydrogeological heterogeneity of the subsurface plays an important role in (non-)intrusion as well. Local hydrogeological conditions for recharge and saltwater intrusion are studied in a coastal groundwater system in Vietnam where geological formations exhibit highly heterogeneous lithologies. A three-dimensional (3D) hydrostratigraphical solid model of the study area is constructed by way of a recursive classification procedure. The procedure includes a cluster analysis which uses as parameters geological formation, lithological composition, distribution depth and thickness of each lithologically distinctive drilling interval of 47 boreholes, to distinguish and map well-log intervals of similar lithological properties in different geological formations. A 3D hydrostratigraphical fence diagram is then generated from the constructed solid model and is used as a tool to evaluate recharge paths and saltwater intrusion to the groundwater system. Groundwater level and chemistry, and geophysical direct current (DC) resistivity measurements, are used to support the hydrostratigraphical model. Results of this research contribute to the explanation of why the aquifer system of the study area is almost uninfluenced by saltwater intrusion, which is otherwise relatively common in coastal aquifers of Vietnam.  相似文献