CONTENTS OF PRACTICAL EXERCISES

... CONTENTS OF PRACTICAL EXERCISES TOPICS EXERCISES PAGES 1 Articles 2 Auxiliary verbs 3 Present and past tenses 4 Future

Ngày tải lên: 16/10/2013, 11:15

Ngày tải lên: 21/12/2013, 00:15

... suggest)…………some solutions. 6. Steve used ( be)…………...a football player. He had to stop ( play)……………..because of an injury. 7. I prefer ( walk )…………………..to ( ride)……………………………… 8. Don't try ( persuade) ... likes ( planting / plant) roses in the garden. 2. My father used ( to smoke/ smoking ) a packet of cigarettes a day. 3. Please stop ( to ask / asking ) me question. 4. I'm used...

Ngày tải lên: 07/06/2013, 01:26

... treatment of angina pectoris many years ago [2]; the pharmacological e ect of the dilation of the coronary arteries was found due to the action of nitrogen monoxide produced by decomposition of alkyl ... ingestion of 10–15 mL of each alkyl nitrite causes serious methe- moglobinemia [6].  e LD 50 value for an alkyl nitrite is reported to be 205 mg/kg.  ere are not many cases...

Ngày tải lên: 18/10/2013, 00:15

... dryness under a stream of nitrogen gas at room temperature e . iii.  e residue is dissolved in 100 µL of the dichloromethane solution of DAEMO (IS solu- tion); a 1-µL of it is injected into ... the detection of only MPA does not enable speci cation of a chemical weapon used.  e identi cation of EMPA is most important to verify the exposure to VX.  e detection limit of EMP...

Ngày tải lên: 18/10/2013, 00:15

...  e peaks of ∆ 9 -THC (22.2 min), CBD (20.6 min) and CBN (23.2 min) are separated well; but the peak of CBC may overlap that of CBD. When the dried cannabis is analyzed, the peaks of cannabinoids ... analysis of ∆ 9 -THC-11-oic acid in human urine [15, 16]. e) A method of silylation of glassware to be done before analysis was reported [17]; such treat- ment suppresses the adsorp...

Ngày tải lên: 24/10/2013, 19:15

... low levels of morphine starting from a large amount of a specimen cannot be a proof of the intake of the drug.  e level of morphine in urine of healthy subjects determined by GC/MS was reported ... analysis is made by the comparison of the retention time of a peak of a specimen with that of the authentic standard and also by the con rmation of the absence of such a p...

Ngày tải lên: 24/10/2013, 19:15

... 0.2-mL volume of the supernatant solution is transferred to a new polypropylene tube of the same type, followed by addition of 0.5 mL of concentrated sulfuric acid f and 0.5 mL of mesitylene. ... gas: He;  ow rate: 2.1 mL/min. Procedures i. Analysis of nitrate i. A 0.2-mL volume of a test specimen, 20 µL of IS solution and 0.2 mL of the saturated silver acetate solution e a...

Ngày tải lên: 24/10/2013, 19:15

... developed a modi cation of the methods, which enabled accurate determination of blood Met-Hb even in the presence of high concentrations of CO-Hb by using about a 100-fold excess of potassium ferricynade ... interfered with by the coexistence of high concentrations of CO-Hb [6]. As low as about 0.2 % of Met-Hb can be measured accurately. However, when high concentrations of...

Ngày tải lên: 24/10/2013, 19:15