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The Web provides its users with abundant information. Unfortunately, when a Web search is performed, both users and search engines are faced with an annoying problem: the presence of misleading Web pages, i.e., spam Web pages, that are ranked among legitimate Web pages. The mixed results downgrade the performance of search engines and frustrate users who are required to filter out useless infor...
abstract part one: the electrode oxidation potentials of a series of eighteen n-hydroxy compounds in aqueous solution were calculated based on a proper thermodynamic cycle. the dft method at the level of b3lyp-6-31g(d,p) was used to calculate the gas-phase free energy differences ,and the polarizable continuum model (pcm) was applied to describe the solvent and its interaction with n-hydroxy ...
مقدمه : استعمال سیگار و مواد مخدر از جمله معضلات رایج بهداشتی محسوب می شوند. نه تنها استعمال سیگار، بلکه مواجه با دود آنها نیز عواقب زیادی را برای انسان ایجاد می نماید. در معرض دود سیگار بودن نیز خطر ابتلا به سرطان و بیماری های قلبی و عروقی را افزایش می دهد. یکی از عوامل مطرح شده در مورد مصرف سیگار اختلال در روند التیام زخم می باشد. بر همین اساس بر آن شدیم که به بررسی اثر مصرف سیگار بر روی باز ...
Purpose – The purpose of this paper is to evaluate the accuracy and functionality of a selection of basic Android and iOS apps for mobile devices designed to generate bibliographic citations. Design/methodology/approach – A number of inexpensive or free apps were installed on several different tablets and phones. Book citations in MLA and APA format were generated and evaluated for accuracy.
an efficient, simple and convenient route is described for the synthesis of biscoumarin (3,3'-(arylmethylene) bis (4-hydroxy-2h-chromen-2-one)) by using of recyclable catalyst tio2@ksf. in this method, we synthesis biscoumarin derivatives via 3multi-component reactions (3mcrs) of two equivalent 4-hydroxycoumarin with one equivalent of aromatic aldehydes using 20 mg nano tio2@ksf as homogen...
Transputing without transputers is mostly concerned with porting software to make other processors behave like transputers. One key aspect of the hardware is to provide these other processors with links. In the board described in this paper, IEEE 1355 DS-Links are chosen to plug in to PCI, which offers good performance, is inexpensive, and pervasive. The board uses a PCI chip, two C101 parallel...
We describe a simple, rapid, and inexpensive unidimensional high-resolution thin-layer chromatographic procedure for screening for aminoacidopathies in newborns. Protein-free filtrates are prepared for ultrafiltration of as little as 10 z1of plasma. A rapid, inexpensive photographic method provides large, high-contrast pictures of the chromatograms for permanent records. A day’s samples can be ...
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