polymerizations of monomers derived from maleic acid
Handbook of Polymer Synthesis Second Edition Episode 7 pptx
... groups were prepared from (86) and had high Tgs [139] New ‘fluoromonomers’ derived from indane (87a,b) were synthesized from 4-methyl-a-methylstyrene [140,141] The PEKs derived from them were as ... polycondensations of a sulfonated DCDPS (17a) with preformed potassium salts of diphenols in DMAc at 170 C [29] The second approach consists of the sulfonation of preformed PESs [30,31] When a PES derived from ... are used as electrophilic monomers in combination with a Lewis acid Secondly, free carboxylic acid served as monomers in combination with an acidic dehydrating agent None of the polycondensation...
Ngày tải lên: 13/08/2014, 16:21
Organic chemitry t8 nucleophilic substitution on the carbonyl group
... the proton from the carbonyl group Exercise 8.2 For an esterification reaction consisting of a mixture of 0.5 moles each of ethanol and acetic acid in liter of solution, give the amount of ethyl ... chromatography column from a slurry of mL of methylene chloride and 2g of silica gel Add g of potassium carbonate to the top of the silica gel Drain the methylene chloride from the column until ... chlorides from carboxylic acids, chemists use either thionyl chloride, SOCl2, or one of the phosphorus chlorides, PCl3 or PCl5 All of these reagents are the acid halides of an inorganic acid www.ochem4free.com...
Ngày tải lên: 05/03/2014, 22:28
Nucleophilic substitution
... activated by means of Lewis or Brønsted acids Epoxides are an exception, since they relieve their ring strain when they undergo nucleophilic substitution, with activation by acid being optional: ... substitution, with activation by acid being optional: Triflate, tosylate and mesylate are the anions of strong acids The weak conjugate bases are poor nucleophiles Nucleophilicity increases in parallel ... extent of the reaction However, as a nucleophile's base strength and steric hindrance increase, its basicity tends to be accentuated If there are abstractable protons at the β-position of the...
Ngày tải lên: 09/06/2014, 13:51
Báo cáo khoa học: "What do we know about medication errors made via a CPOE system versus those made via handwritten orders"
... injection of mg/kg instead of mg of diamorphine They speculate that their CPOE’s connection to serious errors is a “result of physicians choosing the wrong drug template, selecting from multiple ... about the consequences of CPOE systems Their analysis offers an uncommon balance; addressing both the benefits and dangers of CPOEs, and highlighting differences in the types of errors prevented ... make the assumption that CPOE removes errors; in fact different types of errors emerge.” Evaluation of CPOE systems, and of all healthcare information technology, is mostly terra incognita This...
Ngày tải lên: 25/10/2012, 10:39
Báo cáo y học: "Parvovirus B19 Genotype Specific Amino Acid Substitution in NS1 Reduces the Protein’s Cytotoxicity in Culture"
... identification by Abe and colleagues (1) of an amino acid substitution in the NS1 protein of B19 genotype that could not be observed in NS1 proteins isolated from livers of patients with fulminant liver ... lack of an efficient B19 viral replicon and therefore direct experimental verification of the role of amino acid variation on replication efficiency or viral fitness must await the availability of ... (36), identification of conserved amino acid substitutions in the B19 NS1 isolates of only the group A patients suggests that these residues may be critical to the mechanism of B19-associated fulminant...
Ngày tải lên: 26/10/2012, 09:32
Báo cáo y học: "Cell Cycle Arrest by a Natural Product via G2/M Checkpoint"
... a densitometer Results We examined the effect of CKBM on the proliferation of AGS using BrdU cell proliferation assay The dosage of CKBM ranged from to 18 % CKBM inhibited cell proliferation ... increased to 50.5 % The increase of cell population at the G2/M phase was accompanied by a decrease of cell population in the G1 phase of the cell cycle (Fig 3) The effect of CKBM on AGS cells appears ... induction of G2/M cell cycle arrest and dosedependent apoptotic effect From the results, we speculate that the induction of G2/M arrest and apoptosis may be partly due to the increase of the p21,...
Ngày tải lên: 02/11/2012, 11:12
Đề án Khai thác thông tin Marketing qua internet (Gathering Marketing Information via Internet)
Ngày tải lên: 14/01/2013, 11:56
ỨNG DỤNG CÁC PHƯƠNG PHÁP ĐỊA VẬT LÝ GIẾNG KHOAN ĐỂ PHÂN VỈA, ĐÁNH GIÁ ĐỘ RỖNG, ĐỘ BÃO HOÀ CHẤT LƯU CHO GIẾNG RB-XX – MỎ RUBY
Ngày tải lên: 21/03/2013, 10:46
REMOTE CONTROL AND MONITORING SYSTEM VIA SMS AND INTERNET
... message to 3.2.4 Structure of ACK command from phone to PC Type: type command of command needed to ack IV Details of the links in the system 4.1 UART connection Circuit of conversion voltage level ... data by SMS 27 Figure 10 Some functions of the software Figure 11 Observed data as graphs 28 Figure 12 Installation parameters for software 5.2 Some image of website for Control and monitor devices ... image of Data management and processing program 25 5.2 Some image of website for Control and monitor devices 29 5.3 Some images of prototype board 30 5.4 Some images of debugging...
Ngày tải lên: 25/04/2013, 11:25
máy cắt mộng và máy bào via
... tính m thu t ghép v i t o thành góc mà khơng c n ph i hàn ta ph i c t profile gi ng profile c bi t ban u c a có u c a Profile c a c a hình thành t cơng o n ban phơi, cơng ngh q trình ùn phơi b ... hố HB = 170 ÷ 217 σb2 = 600MPa σch2 = 340Mpa Do profile g c c a ã c tiêu chu n hố, thơng s b n c a profile ch n theo tiêu chu n sau: + G c profile α0 = 200 + H s chi u cao + u f0 = h hư ng tâm ... TÍNH TỐN THI T K MÁY C T M NG m i ghép gi a v i nh a có Profile t m thu t cao, mà c bi t Cho nên ta ph i c t u c a cho ghép v a v i profile ó (như hình v ) : Phương pháp gia cơng: mb o phay xác...
Ngày tải lên: 28/04/2013, 09:41
Tìm hiểu quy trình vận hành các thiết bị công nghệ giàn ép vỉa – WIP 40000 mỏ Bạch Hổ
... nước thiết bị điện lượng phân bố tầng Module: Tầng (Lower Deck), tầng (Mezzanine Deck) tầng (Roof Deck) 2.2.1 Tầng gầm Cellar deck - Các bơm chìm hút nước biển; - Vùng bảo quản hoá phẩm; - Các ... khí bình chứa khí công cụ; - Các bể chứa hoá phẩm; - Phòng ắc quy; - Phòng tắm khẩn cấp * Tầng (Roof Deck) bao gồm: - Tuốc bin lực bơm ép chính; - Tuốc bin máy phát điện dự phòng; - Thùng dầu Diesel ... Hồng Thanh Lớp: Thiết bị Dầu khí – K49 Đồ án tốt nghiệp Trường: Đại học Mỏ - Địa Chất * Tầng (Roof Deck) bao gồm: - Tuốc bin lực bơm ép chính; - Tủ CO2 cho bơm ép chính; - Cụm máy nén khí GA-75-10;...
Ngày tải lên: 30/04/2013, 19:29
hành vi tiêu dùng các sản phẩm bán trên vỉa hè của sinh viên khóa 9 khoa kinh tế quản trị kinh doanh trường đại học an giang
Ngày tải lên: 04/08/2013, 22:22
