tạp chí hot english số 76

Ngày tải lên: 17/12/2013, 08:44

... 16. Gọi n t là số vòng quay trục chính (máy tiện có cấp) có quan hệ với số vòng quay thực của máy như sau: 1+ ≤ ≤ ktk nnn ; trong đó - Ø là cộng bội chuỗi số vòng quay trục chính máy; hãy cho ... Chỉ tiêu đánh giá độ chính xác của thông số hình học dụng cụ được dựa trên cơ sở nào? 6. Độ chính xác biên dạng của lưỡi cắt phụ thuộc vào những yếu tố nào nào ? 7. Độ chính xác phần định vị ... dụng thông số nào làm ràng buộc để tối ưu hóa phương pháp gia công bằng cắt? 4. Thường sử dụng thông số nào làm ràng buộc để tối ưu hóa phương pháp gia công bằng cắt? 5. Những thông số nào hiện...

Ngày tải lên: 18/01/2014, 07:20

... 1 (2,0 điểm).Cho hàm số y = x 4 + 2mx 2 + m 2 + m (C) a. Khảo sát sự biến thiên và vẽ đồ thị hàm số khi m = 2. b. Cho T (0; 2). Tìm m sao cho A và 3 điểm cực trị của hàm số thuộc một đường tròn. Câu ... + log 3 (4x + 2) log 4 (4x + 3) = 2 log 3 (4x + 2) log 5 (4x + 4) Câu 9.a (1,0 điểm).Tìm hệ số của số hạng chứa x 9 trong khai triển nhị thức Newton của  1 x 3 + √ x 3  n . Cho biết: 2(C n n+2 + ... điểm).Tính hệ số của x 16 trong khai triển (x + 2x 2 − 3x 3 ) 8 ————Hết———— Thí sinh không được sử dụng tài liệu. Cán bộ coi thi không giải thích gì thêm Họ và tên thí sinh: ; Số báo danh: 7 ...

Ngày tải lên: 06/03/2014, 10:21

Ngày tải lên: 20/03/2014, 02:00

... D. M. Eigler, Science 298, 1381 (2002); published online 24 Oc- tober 2002; 10.1126/science.1 0767 68. 22. T. Komeda, Y. Kim, M. Kawai, B. N. J. Persson, H. Ueba, Science 295, 2055 (2002). 23. ... similar position even in solution. The position of vanadate in solution was determined by the photo cleavage ex- periment. With myosins, the cleavage site (P-loop) agrees well with its ADP-Vi ... Vinkovic´, 1 Alison Ward, 1 * Hayley C. Angove, 1 Philip J. Day, 1 Clemens Vonrhein, 2 Ian J. Tickle, 1 Harren Jhoti 1 † Cytochromes P450 (P450s) metabolize a wide range of endogenous com- pounds and xenobiotics,...

Ngày tải lên: 17/04/2014, 12:21

... 2004; accepted 15 July 2004 Fig. 4. MI images of rock called Adirondack. (Top) Part of image 2M127 8764 42 showing natural surface. (Middle) Part of image 2M129296827 showing same area after RAT brushing. ... of a fluvial origin. No sedimentary rocks or impact breccias have been identified at the site. Photometric observations. Calibrated Pancam images from sequences acquired with the use of a broadband ... Sol 74, sequence P2560, filter L7 (430 nm). (N) Sol 75, sequence P2562, filter L7 (430 nm). (O) Sol 76, sequence P2566, filter R1 (430 nm). (P) Sol 90, sequence P2514, filter R1 (430 nm). S PIRIT AT...

Ngày tải lên: 17/04/2014, 12:21

... point 0 100 200 300 400 500 600 700 800 90 0 A B C 41.4% 27.6% 13.8% 17.2% D 0 criteria 1 criterion 3 criteria 2 criteria 03 Photocell counts 0 200 400 600 800 1000 1200 1400 160 0 Sessions 1 5 9 1317212529333741454953 5760 Cocaine (mg/kg) 0 5 10 15 20 25 30 35 40 4 5 E F Number ... during SA, as measured by number of photocell beam breaks. Results are expressed as the mean over three baseline SA sessions (between sessions 49 and 59). 03 Photocell counts 0 100 200 300 400 500 600 700 800 900 B 03 Active ... usual. In each year, some of the added CO 2 will be fixed (taken up by plants in the process of photosynthesis and thus converted to biomass) or absorbed by the oceans. But because the amount added...

Ngày tải lên: 17/04/2014, 12:21

... coupling strength reveals several distinct hot spots. Hot spots appear in the central Great Plains of North America, the Sahel, equatorial Africa, and India. Less intense hot spots appear in South America, ... influence pre- cipitation. The major hot spots shown lie mainly in such transition zones (23). The insets in the map (Fig. 1) show that not all of the GLACE models place hot spots in the regions indicated. ... in the Sahelian and Indian hotspot regions; nev- ertheless, throughout the world, there exists extensive intermodel variability in the strength and positioning of the hot spots, a reflection of...

Ngày tải lên: 17/04/2014, 12:21

... Wise images of the event were calibrated using the OGLE catalog of bulge stars (15) and the DoPHOT photometry program (16) for crowded fields (table S4). This yielded model- independent values ... CA3 and 244 CA1 pyramidal cells were compared across rooms in 10 rats. Sixty-four CA3 cells and 76 contralateral CA1 cells were recorded simultaneously (SOM Text). 22. V. H. Brun et al., Science ... to 100 mV when the assembly consisting of carbon anode, Na- fion, and Pt cathode was treated by hot- pressing at 400 K, as included in Fig. 3 (compare open versus filled triangle sym- bols). Thus,...

Ngày tải lên: 17/04/2014, 12:22

... National Laboratory, under contract W-7405-ENG-48, Law- rence Berkeley National Laboratory contract DE- AC03 -765 F00098, and Los Alamos National Labo- ratory contract W-7405-ENG-36. Sequences have been submitted ... results at a meeting on high-energy gamma ray astronomy in Heidelberg in July (Science, 6 August, p. 763 ). VERITAS, which took longer to secure funding, has one prototype scope working and should be up ... only process that can produce TeV gamma rays. Accelerated elec- trons colliding with low-energy photons can also produce them. To discover whether at least some of the gamma rays are produced by...

Ngày tải lên: 17/04/2014, 12:22

... Fromentin, B. Planque, Mar. Ecol. Prog. Ser. 134, 111 (1996). 25. J. W. Hurrell, Science 269, 676 (1995). 26. D. H. Cushing, J. Plankton Res. 11, 1 (1989). 27. C. M. O’Brien, C. J. Fox, B. Planque, ... information 800-426-8157 www.qiagen.com www.scienceproductlink.org USB Corp For more information 216 -765 -5000 www.usbweb.com www.scienceproductlink.org Ambion For more information 800-888-8804 www.ambion.com www.scienceproductlink.org Immunetics For ... isotopic distribution char- acteristic of copper (69.2% 63 Cu, 0% 64 Cu, and 30.8% 65 Cu). X-ray photoelectron spectroscopy (XPS) analysis (25, 26 ) of the methanobactin-cop- per complex indicates...

Ngày tải lên: 17/04/2014, 12:22

... Incorporated. Innovative Chromo4 photonics shuttle. MJ Research packs all the optical components for real-time into a module that’s small enough to fit in your hand. The Chromo4 photonics shuttle snaps into ... leaves the atomic oxygen gas in the interior of the cloud depleted in 16 O. Yurimoto and Kuramoto (p. 1763 ; see the Perspective by Yin) have developed a model to explain the meteoritical data using ... astronomical observations. The oxygen isotopic differ- ences developed in the molecular cloud via photodissociation. When the cloud collapsed into the solar nebula disk, the isotopic differences...

Ngày tải lên: 17/04/2014, 12:22

... plants (Fig. 4F), which further supports the role of NO in the photoperiod pathway. The expression of CO is regulated by the circadian clock and photoperiod, and the circadian rhythm of CAB expression ... with a 360- field of view. The lower ionosphere data show photoelectron lines emerging as a result of ionospheric CO 2 þ (Fig. 1). The photoelectron boundary (PEB) separates ionospheric elec- trons ... protochlorophyllide in the postgermination dark period and seems to indicate that photooxidative damage in light is caused by the photosensitizing activity of this tetrapyrrole intermediate. In time-course...

Ngày tải lên: 17/04/2014, 12:22

... Lifelong diabetics receiving new islets have been able to abandon, at least for a time, insulin shots. According to an NIH survey published last month, 22 of 38 islet recipients were still off ... evidence suggests it is time to move beyond casting the Pleisto- cene extinction debate as a dichotomy of humans versus climate and instead to untangle the complex impacts that both had on megafauna. ... Pleistocene extinctions debate began but can now be addressed through new dating techniques (7, 75, 76) ; through the assembly and analysis of paleo- ecological, paleoclimatic, and archaeological databases...

Ngày tải lên: 17/04/2014, 12:22

... bracovirus. Parameter CcBV families PTP ank crp cyst EP1-like hp1 hp2 f1 f2 Number of related genes 2764 3 6 2765 Circle no.: no. of related genes C1:8 C11:1 C18:2 C19:3 C1:3 C30:1 C3:1 C9:2 C19:3 C4:2 ... (0.11) 464.3 0.63 N j1 563 2.06 (0.28) 0 .76 (0.05) 979.1 0.64 Herb H 158 0.064 (0.260) 2.05 (0.03) 1.02 (0.09) j0.26 (0.11) 454.1 0.74 N j1 327 1.01 (0.01) 0 .76 (0.05) 948.7 0.74 Omn H 44 0.022 (0.187) 15.87 ... Permian and Triassic ammonoids on the 1 Centre de Se ´ dimentologie–Pale ´ ontologie, FRE CNRS 2761 , Universite ´ de Provence, 3 place Victor-Hugo, F-13331 Marseille Cedex 3, France. 2 Museum...

Ngày tải lên: 17/04/2014, 12:23

... axonal pruning outside the hot spot is related to the enhanced local extension of axonal ar- bors within the hot spot (48), leading to the reorganization of local networks in the hotspotthatisdetectedelectrophysiologi- cally ... learned pictures formed a focal patch in area 36 (‘ hot spot’’). Three types of retrograde tracer were injected into area 36. One tracer was injected into the hot spot. Two different tracers were injected ... into the hot spot. Two different tracers were injected into two re- gions adjacent but outside the hot spot. Then, the distribution of retrogradely la- beled neurons and electrophysiologically recorded...

Ngày tải lên: 17/04/2014, 12:23

Ngày tải lên: 17/04/2014, 12:23

Ngày tải lên: 17/04/2014, 12:23

Ngày tải lên: 17/04/2014, 12:23