English 6 unit 4

Bài 4 - Tiếng anh lớp 6 sẽ giúp học sinh biết cách mô tả trường học, nói về thời gian, làm quen với số đếm, số thứ tự, cách đặt câu hỏi với "Which". Mời bạn tham khảo giáo án.

17p ngankhanh49 28-10-2013 79 12   Download

Novel chromogenic substrates for endo-b-galactosidase were designed on the basis of the structural features of keratan sulfate. Galb1-4GlcNAcb1-3Galb1-4GlcNAcb-pNP (2),which consists of two repeating units ofN-acetyl-lactosamine,was synthesized enzymatically by consecutive additions of GlcNAc and Gal residues top-nitrophenyl b-N-acetyllactosaminide. In a similar manner,Glc-NAcb1-3Galb1-4GlcNAcb-pNP (1),GlcNAcb1-3Galb1-4Glcb-pNP (3),Galb1-4GlcNAcb1-3Galb1-4Glcb-pNP (4), Galb1-3GlcNAcb1-3Galb1-4Glcb-pNP (5),and Galb1-6GlcNAcb1-3Galb1-4Glcb-pNP (6) were synthesized as analogues of2.

11p tumor12 20-04-2013 29 2   Download

Streptococcus mitisstrain SK598, which represents a sub-group of biovar 1, possesses a unique variant of the C-polysaccharide found in the cell wall of all strains of Streptococcus pneumoniaeand in some strains ofS. mitis. This newvariant lacks the cholinemethyl groups in contrast to the previously characterized forms of C-polysaccharide, whichall containone or two choline residues per repeat. The following structure of the repeating unit of the SK598 polysaccharide was established: where AAT is 2-acetamido-4-amino-2,4,6-trideoxy-D-galactose....

6p fptmusic 16-04-2013 30 2   Download

The activity of the digestiveb-glycosidase fromSpodoptera frugiperda (Sfbgly50, pH optimum 6.2) depends on E399 (pKa¼4.9; catalytic nucleophile) and E187 (pKa¼7.5; catalytic proton donor). Homology modelling of the Sfbgly50 active site confirms that R97 and Y331 form hydrogen bonds with E399. Site-directed mutagenesis showed that the substitution of R97 bymethionine or lysine increased the E399 pKa by 0.6 or 0.8 units, respectively, shifting the pH optima of these mutants to 6.5.

10p fptmusic 12-04-2013 36 3   Download

E2020 (R,S)-1-benzyl-4-[(5,6-dimethoxy-1-indanon)-2-yl]-methyl)piperidine hydrochloride isa piperidine-based ace-tylcholinesterase (AChE) inhibitor that was approved for the treatment of Alzheimer’s disease in the United States. Structure-activity studiesof thisclassof inhibitorshave indicated that both the benzoyl containing functionality and the N-benzylpiperidine moiety are the key featuresfor binding and inhibition of AChE.

12p fptmusic 12-04-2013 43 2   Download

Ana-amylase (TVA II) from Thermoactinomyces vulgaris R-47 efficiently hydrolyzesa-1,4-glucosidic linkages of pullulan to produce panose in addition to hydrolyzing starch. TVA II also hydrolyzesa-1,4-glucosidic linkages of cyclodextrins anda-1,6-glucosidic linkages of isopanose. To clarify the basis for this wide substrate specificity of TVA II, we soaked 4 3 -a-panosylpanose (4 3 -P2) (a pullulan hydro-lysate composed of two panosyl units) into crystals of D325N inactive mutated TVA II.

9p dell39 03-04-2013 52 5   Download

Sulfated galactanj-carrageenan is a linear polysaccharide with a repeating disaccharide sequence of alternating 4-sulfated 3-linked galactose and 4-linked 3,6-anhydrogalactose units. In contrast to many examples of chemical hydrolysis of polysaccharides, mild acid treatment of j-carra-geenan resulted in facile and highly specific cleavage.

13p viettel02 22-02-2013 41 2   Download

Select the correct instructions for the actions in Figure 4.1: For example: A = 2 1. Turn the jack handle anticlockwise to lower the car. 2. Turn the gear wheel anticlockwise to raise the drill. 3. Turn the bolt clockwise to tighten it. 4. Press the top button to stop the motor. 5. Press the largest pedal to stop the car. 6. Pull the handle down to cut the metal bar. 7. Push the bar down to raise the load

12p dien545 24-01-2013 95 21   Download

Practise 2 1. The rocker box is the cylinder head. 3. The sump is the cylinder block. 2. The cylinder block is the cylinder head. 4. The cylinder block is the sump. 5. The cylinder block is the sump and the cylinder head. 6. The prop shaft is the gearbox and the differential 7. The differential is the two half shafts

10p dien545 24-01-2013 105 20   Download

§Ò c¬ng «n tËp HKII – khèi 10 A. Grammar 1. Conditional type 2 and 3. (Unit 9, 11) 2. The passive voice. (Unit 10) 3. To + infinitive to talk about purposes. (Unit 12) 4. Wh-questions. (Unit 12) 5. Adjectives of attitute. (Unit 13) 6. It be

10p neyugnmall001 24-08-2012 386 109   Download

Multiple Choice Exercises - English 10 Leâ Ngoïc Thaïch UNIT 3: DAILY ACTIVITIES A. PHONETIC I. Choose the word whose underlined part is pronounced differently from that of the other words. 1) A. down B. own C. now D. how 2) A. kitchen B. then C. rest D. bed 3) A. suits B. lands C. rings D. plans B. hour C. high D. have 4) A. home 5) A. born B. work C. morning D. short II. Choose the word that has stress pattern different from that of the other words. 6) A. dinner B. during C. although D. number 7) A. evening...

9p meomap8 21-12-2011 119 14   Download

AIMS 1. Knowledge: Hs tap làm quen voi nhau . a. Hs tap làm quen cach noi ve xuat su que huong, dan toc b. Hs co the nghe, noi ve xuat su 2. Skills: Hs tap trung luyen ki nang nghe, noi, doc, viet. 3.Language focus: a. Grammar: A: Where are you from? B: I’m from London. I’m English.

7p phalinh14 06-08-2011 174 29   Download

AIMS 1Knowledge: Ss’ll able to read and write a paragraph about capital, country, Nationality 2. Skills: reading and writing 3.Language focus: a. Grammar: A: Where is he/she from? B: He/She’s from London. He/She’s English.

7p phalinh14 06-08-2011 538 70   Download