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تعداد نتایج: 621122 فیلتر نتایج به سال:
New molecular line observations of the Bok globule Barnard 68 in HCO + irrefutably confirm the complex pattern of red and blue asymmetric line profiles seen across the face of the cloud in previous observations of CS. The new observations thus strengthen the previous interpretation that Barnard 68 is undergoing peculiar oscillations. Furthermore, the physical chemistry of B68 indicates that the...
IN a recent communication [Hunter, 1921] a colorimetric method for the estimation of carnosine in muscle extract was generally outlined. This was based on a method of estimation of iminazoles devised by Koessler and Hanke [1919, 1]. This method depended on the coupling of carnosine with diazotised sulphanilic acid in alkaline solution to form an azo dye. The colour produced was measured against...
this study examined the effects of collaborative strategic reading and direct instruction in persuasion on iranian high school students persuasive writing and attitudes. students in three intact classes were assigned to one of three treatment conditions: collaborative strategic reading and direct instruction in persuasion or direct instruction in persuasion or a control group. treatment effects...
چکیده ندارد.
Infectious disease introduced by non-native species is increasingly cited as a facilitator of native population declines, but direct evidence may be lacking due to inadequate population and disease prevalence data surrounding an outbreak. Previous indirect evidence and theoretical models support squirrelpox virus (SQPV) as being potentially involved in the decline of red squirrels (Sciurus vulg...
To evaluate the presence of rickettsial agents in hippoboscid flies with molecular methods, 81 sheep keds (Melophagus ovinus) were collected from 23 sheep, 144 deer keds (Lipoptena cervi) were caught in the environment, and a further 463 and 59 individuals of the latter species were obtained from fresh carcasses of 29 red deer and 17 roe deer, respectively. DNA was extracted individually or in ...
در این تحقیق نانو ذرات کادمیم سولفید با روش سل- ژل تهیه و با استفاده از تکنیک xrd مورد شناسایی قرار گرفت. میانگین سایز ذرات کادمیم سولفید nm 18محاسبه گردید. همچنین نانو ذرات کادمیم سولفید دوپه شده با نقره با روش سل- ژل تهیه و با استفاده از تکنیک های xrd / xrf / sem /edxa مورد مشخصه یابی قرار گرفت. میانگین سایز ذرات کادمیم سولفید دوپه شده با نقره nm46 محاسبه شد. سایز محاسبه شده از روش دبای-شرر د...
Related Articles A new detector for mass spectrometry: Direct detection of low energy ions using a multi-pixel photon counter Rev. Sci. Instrum. 83, 013304 (2012) A transport-based model of material trends in nonproportionality of scintillators J. Appl. Phys. 109, 123716 (2011) A digital method for separation and reconstruction of pile-up events in germanium detectors Rev. Sci. Instrum. 81, 103...
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