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The method based on the determination of trace elements in geological samples by sector high resolution inductively coupled plasma mass spectrometry with mixed acid digestion procedure has been evaluated. The evaluation show that the results of 29 elements including Li, Cr, Co, Ni, Cu, Zn, Ga, Rb, Y, Cs, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, W, Tl, Bi, Th and U are satisfactory; V, Sr, Nb, Mo, In, Sb, Ba and Pb are acceptable; Sc, Cd, Hf, Ti, Mn, Fe, Ge and Sn have of large deviations, Be, Ta, Zr, As and Se are worse. 相似文献
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微波消解-电感耦合等离子体质谱法同时测定茶叶中42种元素 总被引:1,自引:0,他引:1
建立了电感耦合等离子体质谱法(IcP—Ms)标准模式和优化的碰撞池模式(CCT)结合同时测定茶叶中Li、Be、Mg、Al、V、Cr、Mn、Fe、Co、Ni、Cu、Zn、Ga、As、Se、Sr、Mo、Ag、Cd、Sn、Sb、Cs、Ba、Tl、Pb、Bi和16种稀土元素共42种元素的方法。样品经过微波消解,以Ge、In、Re为内标消除基体干扰,通过碰撞池技术消除多原子质谱干扰测定上述元素。对于所测元素校准曲线的相关系数均大于0.9990,回收率范围为90%-110%,相对标准偏差为0.22%-3.97%,大部分元素检出限均小于0.5μg·kg^-1。该方法简便、省时、准确、灵敏度高,适用于实际样品的检测。 相似文献
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V. E. Asadchikov V. G. Babak A. V. Buzmakov Yu. P. Dorokhin I. P. Glagolev Yu. V. Zanevskii V. N. Zryuev Yu. S. Krivonosov V. F. Mamich L. A. Moseiko N. I. Moseiko B. V. Mchedlishvili S. V. Savel’ev R. A. Senin L. P. Smykov G. A. Tudosi V. D. Fateev S. P. Chernenko G. A. Cheremukhina E. A. Cheremukhin A. I. Chulichkov Yu. N. Shilin V. A. Shishkov 《Instruments and Experimental Techniques》2005,48(3):364-372
An X-ray diffractometer with a mobile emitter-detector system is able to perform various X-ray examinations of a stationary sample. The design for this instrument is described, along with its operating principles and control programs. Owing to its high-precision angular movement sensors and its two detectors (one of these, a linear position-sensitive detector, has a working length of 100 mm and a resolution of <0.2 mm), the diffractometer can be used in both traditional and nontraditional experiments on X-ray reflection, scattering, and absorption. Results from using this instrument in reflectometry and X-ray tomography are presented as an example.__________Translated from Pribory i Tekhnika Eksperimenta, No. 3, 2005, pp. 99–107.Original Russian Text Copyright © 2005 by Asadchikov, Babak, Buzmakov, Dorokhin, Glagolev, Zanevskii, Zryuev, Krivonosov, Mamich, L. Moseiko, N. Moseiko, Mchedlishvili, Savel’ev, Senin, Smykov, Tudosi, Fateev, Chernenko, Cheremukhina, Cheremukhin, Chulichkov, Shilin, Shishkov. 相似文献
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Tadashi Terada 《Microscopy research and technique》2014,77(10):825-831
Background: Nothing is known about huge clusters (HC) of embryonic stem cells (ESC) in human fetal organs (HFO). Aim: To know the status of HC‐ESC in HFO. Methods: Morphology and immunohistochemistry (IHC) in 32 HFO of 7–40 gestational weeks (GW). Results: HC‐ESC were seen in many HFO including central nervous system, spinal cords, spine, soft tissue, bone, skin, thyroid, lung, liver, pancreas, gall bladder, extrahepatic bile duct, adrenal, kidney, bladder, foregut, midgut, hindgut, female and male genital organs, and neurons. HC‐ESC's were composed of two populations depending on constituting cells. One were large cells with ample acidophilic cytoplasms with vesicular nuclei and nucleoli. The other were small cells with scant cytoplasm with hyperchromatic nuclei without nucleoli, resembling lymphocytes. The HC‐ESC were frequently showed neuronal differentiation. HC‐ESC were positive for NCAM, synaptophysin, NSE, chromogranin, PDGFRA, AFP, ErbB2, bcl‐2, KIT, MET. They were negative for CD45, CD3, CD20, EMA, CEA, CA19‐9, cytokeratin (CK) 7, CK8, CK18, CK19, MUC1, MUC2, MUC5AC, and MUC6. The mean Ki‐67 labeling index (LI) was 13% ± 7%. HC‐ESC showed a little glycogen but lacked mucins. These HC‐ESC were seen in 7–25 GW, and they were rarely seen in 26–40 GW. Conclusions: The morphology, IHC, and ontogeny of HC‐ESC were described. Microsc. Res. Tech. 77:825–831, 2014. © 2014 Wiley Periodicals, Inc. 相似文献
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Salvadori ML Lessa TB Russo FB Fernandes RA Kfoury JR Braga PC Miglino MA 《Microscopy research and technique》2012,75(10):1437-1444
In this work, we studied the embryology of mice of 12, 14, and 18 days of gestation by gross observation, light microscopy, and scanning electron microscopy. Grossly, the embryos of 12 days were observed in C‐shaped region of the brain, eye pigmentation of the retina, first, second, and third pharyngeal arches gill pit nasal region on the fourth ventricle brain, cervical curvature, heart, liver, limb bud thoracic, spinal cord, tail, umbilical cord, and place of the mesonephric ridge. Microscopically, the liver, cardiovascular system and spinal cord were observed. In the embryo of 14 days, we observed structures that make up the liver and heart. At 18 days of gestation fetuses, it was noted the presence of eyes, mouth, and nose in the cephalic region, chest and pelvic region with the presence of well‐developed limbs, umbilical cord, and placenta. Scanning electron microscopy in 18 days of gestation fetuses evidenced head, eyes closed eyelids, nose, vibrissae, forelimb, heart, lung, kidney, liver, small bowel, diaphragm, and part of the spine. The results obtained in this work describe the internal and external morphology of mice, provided by an integration of techniques and review of the morphological knowledge of the embryonic development of this species, as this animal is of great importance to scientific studies. Microsc. Res. Tech. 2012. © 2012 Wiley Periodicals, Inc. 相似文献
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《Instruments and Experimental Techniques》2006,49(6):798-814
The CMD-2 cryogenic magnetic detector used in a set of experiments on the VEPP-2M electron-positron collider at energies as
great as 1.4 GeV is described. The design of the detector subsystems and the algorithms for reconstructing tracks in the drift
chamber and the CsI and BGO calorimeters are presented. The spatial and energy resolutions of the detector systems have been
determined from analysis of experimental data. The design of the superconducting solenoid and the layout of its powering by
means of a superconducting transformer are shown. The trigger system of the detector and the conditions for recording “charged”
and “neutral” events on a magnetic tape are described. The procedure used to monitor the parameters of the detector systems
during the experiment is presented.
Original Russian Text ? E.V. Anashkin, V.M. Aul’chenko, R.R. Akhmetshin, V.Sh. Banzarov, L.M. Barkov, S.E. Baru, N.S. Bashtovoi,
D.V. Bondarev, A.E. Bondar’, A.V. Bragin, N.I. Gabyshev, D.A. Gorbachev, A.A. Grebenyuk, D.N. Grigor’ev, D.A. Epifanov, I.V.
Zhuravkov, V.G. Zavarzin, A.S. Zaitsev, S.G. Zverev, F.V. Ignatov, V.F. Kazanin, S.V. Karpov, G.M. Kolachev, P.P. Krokovnyi,
A.S. Kuz’min, I.B. Logashenko, P.A. Lukin, K.Yu. Mikhailov, V.A. Monich, M.A. Nikulin, A.B. Nomerotskii, V.S. Okhapkin, S.G.
Pivovarov, A.S. Popov, T.A. Purlats, S.I. Redin, N.I. Root, A.A. Ruban, N.M. Ryskulov, A.L. Sibidanov, V.A. Sidorov, A.N.
Skrinskii, V.P. Smakhtin, I.G. Snopkov, E.P. Solodov, P.Yu. Stepanov, A.I. Sukhanov, V.M. Titov, V.E. Fedorenko, G.V. Fedotovich,
B.I. Khazin, A.G. Shamov, Yu.M. Shatunov, B.A. Shvarts, B.N. Shuvalov, D.V. Chernyak, S.I. Eidel’man, Yu.V. Yudin, 2006, published
in Pribory i Tekhnika Eksperimenta, 2006, No. 6, pp. 63–79. 相似文献
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The application of inductively coupled plasma mass spectrometry (ICP-MS) for determination of boron in water and urine samples was described. The detect limit (3σ) was 0.057 μg/L. The precision of the method was less than 2%. Multi-elements including Cr, Cu, Cd, Ba, Sr, Mn, Co, Tl, Li, Pb, Ca, Fe, K, Na, Mg, P, Si and Zn could be measured simultaneously. The method was successfully used in practice. 相似文献