1 T 51(6ABC) 509-512 TAP CHi HOA HOC I ! THANG 11 NAM2013edcbaZYX f PHAN 86 vA rtcs TU CHAT NHIEM HCru co B ~ N oCPs PCBs VUNG T R I~ U VEN BIEN BAcBAv i e r NAM a ao vA i J Duong Thanh Ngh(, I TrAn Dfrc Th~nhl, D3 Thj Vi~t Huong" nmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA Vi?n Tai Nguyen va Moi Truong BiJn, Viin Han him Khoa h9C va Cong ngh? Vi?! Nam "Iruong D9i h9C Khoa h9C Tv nhien, DHQG ZYXWVUTSRQPONMLKJIHGFEDCBA H a N(Ji D~n Toa soan 15-8-2013 Abstract Lindan, Aldrin, Endrin, Dieldrin, 4,4-DDE, 4,4-DDD, 4,4-DDT (OCPs) and PCBs were determined in three components of the inter-tidal zone of coastal North Vietnam, include water, sediments and tissues of Clam (Meretrix lyrata) in March and August, 2012 The results show that the OCPs and PCBs were appearing concurrently in three those components water, sediments and tissues of Clam The concentrations of OCPs in three those components was respectively 19.53 ng/L, 1.19 ng/g, 7.90 ng/g and PCBs was 104.31 ng/L, 2.20 ng/g, 82.11 ng/g The pollutant distribution of total OCPs and PCBs in the three environment components of the intertidal zone of coastal North Viemam was varied by the seasons The bioaccumulation factor (BAF) of the total OCPs and PCBs for Clam was in the range from 28.02 to 269.36 The BAF value ofOCPs and PCBs for Clam was respectively 58.07 and 55.20 Keywords: OCPs, PCBs, bio-accumulation, intertidal zone, North Vietnam MO DAU Cac ch&t () nhi~m bihl co bBn OCPs va PCBs la nhfrng chftt h6a hoc t6n hru lau dai moi tnrong, kha nang tich liiy sinh hoc thong qua chu6i thuc an va tac dong xAu d~n sue khoe ngiroi nhu ngo doc, dot bien gen va ung thir Phan b6 va tich tu OCPs, PCBs sinh v~t (y vung bien ven 00 BAc Viet Nam it duoc nghien ciru va danh gia s6 li~u thiSu d6ng bQ Bai bao trinh bay k€t qua nghien ClJ'U v~ cac chftt OCPs va PCBs moi tnrong mroc, trAm tich va sinh v~t (loai ngao Meretrix lyrata) vung trieu ven b e bi~n khu vue duyen hai B~c Viet Nam Bai bao la k~t qua cua dB tai cAp Vi~n Han lam Khoa h9C va Cong ngM Vi~t Nam, ma s6 CTGO 1; co I THVC NGHIEM L J.ay mau ng h·ien cuu X A rmra tir 25,70°C d~n 32,70°C va co xu huang tang tu vung tri8u ven bo bi~n Mong Cai d~n Ninh Blnh Tinh chAt h6a ly c u a m6i tnrong mroc biSn tai vi tri lfty m~u hai dot diroc trinh bay (y bang Cac gia trj v8 nhi~t dQ, dQ mu6i, IUQ'I1goxy hoa tan, pH cua ruroc bi~n tai vi tri lAy mftu khoang gia trj c u a Quy chuAn Viet Nam [2] Mftu mroc d u c c lAy (y dQ sau 0,5-0,7 m b a n g thi~t bi Bathomet va duoc chira chai thuy tinh ~ J > , h 1" d " mau toi M Xau tram tic ay u sau - em bXang cuoc Ponar lam bAng thep khong ri, c6 d~c diSm min, ph An bun set cao, khong pha cat, duoc bao quan 19 thuy tinh mAu toi Mftu ngao (Meretrix lyrata) lAy bang cao va hroi day, c6 d~c di~m kich thttfre dai, rong va b8 dAy trung binh tUODg fro g la 2,6-5,8 cm, 1,0-5,1 em v a 0,6-3,3 em, duoc boc giAy nhom da him sach, TAt ca cac mftu lAy dircc b a o q u a n di8u' ki~n nhi~t dQ 0A 4°C [3, 5] , Miu c u a ba hQ'P phAn m6i twang diroc thu thap i d6ng thai vao hai dot, vao thing (mua kho) va ,kthang (mua muajnam 2012 vung tri8u ven '~ba bi~n khu V\TC B~c Vi~t Nam tir Mong Cai d~n ,Ninh Binh Trang hai dot lAy mftu d8u khong g~p f mua hay giong bao Nhiet dQ khong dao dQng o mua kho tir 16,lO C d~n 22,70°C va mua 2.2 ThY'c nghi~m 2.2.1 Tach eMit OCPs va PCBs 509 MJu nuac: lit mftu duoc chiet ba IAn voi nhexan, co quay chan khong v8 th~ tich khoang mL, d jc h mftu co quay d u c c cho qua cot sic ky chira g TCHH, T 51(6ABC), 2013 Duong Thanh N g h i va cong S {f silicagel, nra giai b&ng 45 tnL n-hexan; co qual tfnh va dinh luong OCPs va PCBs Di~u kien v?n dung djch nra giai khoang 0,5 mL; them chat hanh thi~t bi GC-ECD dS phan tich xac dinh OCPs nQi chudn va djnh rmrc d~n mL bAng n-hexan [4] - va PCBs da d u c c xac l~p Chuang trinh nhiet dQ COt: MJu tram tich: Chi~t sieu am 20g mftu kho ba IAn 80°C, phut, 20°C/pMt, 250°C, 5°C/phUt, 290°C, bang h6n hop dung moi n-hexanlaxeton (1:1, v/v); ly phut T6ng thai gian phan tich la 22,5 phut; t6c tam, eo quai chan kho!lg djch chi~t d~n khoan~ dong mang N2 la 0,9 mL/s voi tY I~ chia dong mL; tach chat tren cQt sac ky chira g silicagel bang 1:28; cQt sic ky mao quan HPI (30 m x 0,32 mm x 3x15 mL n-hexan; co quay dich nra giai v~ 0,5 mL; 0,25 mm) them ch§t nQi chudn va dinh rmrc d~n mL bang n-hexan [6] MJu thit ngao: Chi~t sieu am 20 g mftu 2.2.3 Dinh lu o n g OCPs va PCBs thjt ngao d6ng nhAt, kho bAng Na2S04 khan, ba I§n bAng h6n hop dung moi n-hexanlaxeton (1: 1, v/v); Iy Pha cac h6n hop dung djch chuan PCBs va tam m§u chiet d~ tach loai dung moi kh6i mftu thjt OCPs nrong irng nong dQ 15 ng/ml., 30 nglmL, 60 n~ao Co quay djch chiet v~ khoang mL; dung cot nglmL, 90 nglmL; 10 nglmL, 50 nglmL, 100 ng/mL, sac ky thAm thAu gel d8 loai be cac chAt bee, amin 200 ng/ml Phan tieh cac h6n hop chuan tren bang c6 mftu chiet, n6i ti~p voi cot sic ky chira g GC-ECD 6890 voi diSu kien da neu " rnuc 2.2.2 silicagel d~ nra giai bang 3x 15 mL n-hexan; co quay Phuong trinh djnh luong PCBs va OCPs l§n lUQ1eo M s6 nrong quan (R2) > 0,99; (R2) > 0,97 N6ngedcbaZ ' v~ 0,5 mL, them chit nQi chusn, djnh rmrc d~n I mL bAng n-hexan [6, 10, 11, 13] t6ng PCBs duoc tinh IPCB = A x (PCB28+PCB52 +PCBI0l+PCB138+PCBI53+PCBI80); d O 'I' p h d n tich xac dinh OCPs va PCBs 2.2.2 Thilt hiZYXWVUTSRQPONMLKJIHGFEDCBA A la h~ s6 nrong irng cua mlii loai h6n hop Aroelor,1 A c6 gia tri tir 3-8,5 [10, 11, 16] N6ng dO OCPs Thi~t bj 'sic ky kh£ detecto bit di~n nr cua hang diroc tinh h\ IOCPs = (Lindan+Aldrin+Endrin +Dieldrin+4,4-DDD+4,4-DDE + 4,4-DDT).nmlkjihgfedcb Agilent 6890, My (GC-ECD) diroc sir dung d~ dinh ~ iJ rmKu Vi tri lay J , (" Bang 1: D~c tinh h6a Iy cua moi tnrong nuoc bien yen bo tai vi trf I§y m§u Toa I ) t; & VIdQ Nhiet dQ, DQ muoi, °c Kinh dQ 0/00 Oxi hoa tan, mg/L I n .Jy1ongOii 19'58'37" 106'08'48" 18,20-28,00 10,50-24,50 5,54-6,34 ,6 -6 ,7 Tien Yen 20'14'08" 106'34' 19" 17,80-28,15 10,00-30,00 5,77-6,92 6,84-7,40 H~ Long 20'35'36" 106'37' 10" 17,25-30,60 11,00-31,50 5,45-6,22 6,71-7,72 Cira Tray 20'49'10" 106'45'40" 17,40-31,40 10,00-13,50 4,60-5,48 6,40-7,12 i" p pH II t, ' I~ , ! Cira T.Binh 20'59'42" 106'04'17" 20,70-28,55 >1,00-8,50 5,71-6,34 6,78-7,35 Cira Ba Lat 21'18'29" 107"35'38" 21,30-27,50 7,00-19,00 5,34-6,78 7,04-7,25 Cira Day 21'30'23" 107"53'04" 19,85-28,60 7,50-11;50 5,74-6,22 7,12-7,48 QCVN - 30 2.2.4 H? s6 tich tu sinh h9C Trong nghien ciru nay, M s6 tich tu sinh hoc (BAF - Bioaccumulation Factor) cua OCPs va PCBs duoc tinh theo cac nghien ciru da cong b6 [4, 8, 12r Theo BAF = (B A )/(E C f), voi BA la nong dQ chat o nhi~m t6n tai co thS sinh V?t va ECf Ia nong dq ch~t nhi~m moi tnrong s6ng cua sinh v~t KET QuA V A THAO LuAN 3.1 NBng dq cac chAt OCPs va PCBs mh nghien cuu cac Khong co >5 ' j~ 6,5-8,5 ;~ ,I Cac chAt nhiem OCPs dLIQ'Ctim th§y cae m§u mroc, trAm tich vung trieu lAy hai lfin vao (h a n g va thang T6ng n6ng dq OCPs dao dQng nam, khoang tir 9,97 ngIL d~n 30,32 ng/L, trung blnh cho toan vung hi 19,53 ng/L cho miiu nLI~~~ khoang tu 0,61 nglg d~n 3,03 n~g kho, trung b,inh';l toan vung la 1,19 ng/g kho cho rnau tram tich N o n dQ OCPs tlm thAy cac m§u ngao tti 1,51 15,61 nglg kho, trung binh cho toan vung 1a 7,9(')', nglg kho, Cac chAt nhi€m PCBs cfing duoc tim ~ cac m~u mroc, trAm tlch bien vung tri€u lAy11 t vao thang va thang Nong d(> PCBs mIa, , I 510 " ~ • ~ I l ' J T lCllll, T I(6ABC), 2013 Phdn b6 va tich tu chd: nhiim rnroc lAy vao thang cao gAp 22 I~n soedcbaZYXWVUTSRQPONMLKJIHGFEDCBA v o i thang 3, gifra hai rnua khac VOi PCBs, ngucn va luong mroc ti~p nhan a cac vung trieu khac trung blnh toan vung la 104,31 ng/L Nong dO PCBs nen n6ng PCBs trAm tich m~t thang cao trAm tich m~t lAy van thang va thang nllm khoang tll 0,61-8,70 ng/g kho, trung blnh toan hem thang D~c di~m khac bi~t v~ tlch tv gica PCBs cao hem so voi OCPs trAm tich, d~n d€n vung la 2,20 ng/g kh6, cao hem narn 2011 (0,58-1,79 vise tich tu oCPs cham pha hem moi tnrong mroc, ng/g kh6 [1, 13]) 1,84 IAn va PCBs thl cung pha voi moi tnrong nuoc, hinh Trong mo thit cua cac mau ngao lAy dot thang Ngao (Meretrix lyrata) la mot loai hai manh vo v a thang co PCBs voi n6ng tir 7,05 - 171,82 s6ng day moi tnrong cat pha bun, chi th j moi ng/g kho, trung blnh toan vung 87,12 ng/g kho, cao truan~ boi d~c di~m an IQc va di chuyen khong dang hon narn 2011 (2,31-52,98 ng/g kho [1, 13]) 6,50 k~ Nong OCPs va PCBs mo thit cua ngao IAn song a vung tri~u ven b a bien B~c Vi~t Nam bi€n 3.2 Phan b& va tich t\1 cac eh~t OCPs, PCBs d6i c6 tinh chAt mila theo rnoi tnrong nuoc va moi tnrong tr~m tich, hinh cac hlfP phAn moi tnrc'mg SIl phan b6 va tich tu cac chAt OCPs, PCBs 5,00 moi truong mroc bi~n bien dong khac theo rnua va khu VIlC, chirng to vung nghien cuu co 4,00 ti& p n h a n n g u o n p h a t thai nhiern OCPs va PCBs 3,00 ChAt nhi~m OCPs bj dm sir dung tnroc PCBs tll r~t lau nen hrong b6 sung vao moi tnrong mroc 2,00 khong du d~ bi€n d6i rnanh theo mua, d6 su 1,00 Ia n Nguoc lai, chenh I~ch gitra hai mua 11\ khongZYXWVUTSRQPONMLKJIHGFEDCBA chAt PCBs dang qua trlnh thay the dAn vi eArn 0,00 sli dung, nen hrong PCBs moi tnrong rnroc Thang TMng TB n~m TMng TMng TB n~m vung trieu cira song tang tiep nhan dong chay tli O C P s (n g lg khO) PCBs (n g lg khO) luc dia b] nhi€m PCBs, va tang dot bi€n thang mua mira, hlnh aMC glY flHL !:IC.Tray oC.TB IilC BL ClC.£lay cTMgbim Hinh 2: Pharr b6 va tich tv OCPs, PCBs trAm tich vung tri~u ven b e bien B~c Vi~t Nam 15000· , I ~M C sTY 100,00 SO,OO IlMC cHL 40,00 slY 30,00 cHL i!lC.Tray 50,00 I' cC.TB I oooJ 20,00 BC.Day 10,00 CC.Tray ncra ~":' ::ill 000 " o TIlllQ b im , TMng TMng TB P C B s(~ ) nmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA Th3ng Th3ng TB Mm TMng TMng TB Mm O C P s(~ ) ec BL OCPs (nglg IrJlO) "'c BL nam TMng TMng TB!lam PCBs (n g lg IrJlO) gC.!lay OTMgbi'/1 Hinh 1: Phan b6 va tich tv OCP, PCBs mroc Vung tri~u ven bo bien B~c Vi~t Nam Hinh 3: Phan b6 va tich tv OCPs, PCBs thjt s\!, phan b6 va tich tu OCPs, PCBs khac theo khu Y\l'C va theo mua, nhung khong gi6ng voi moi tnrong nuoc N6ng OCPs, PCBs trAm rich phu thuoc van dong hoc cua qua trinh tich tv va ling dong, nen nong dO OCPs, PCBs trAm tich thuong c6 xu huong tang theo thai gian Khi bi tic : dong tll ngucn la hrong mroc khong Ion, n6ng dO 'OCPs tram tich thang thAp hem thang Di~u "k:hacbi~t d6 c6 th~ dong hrc hoc dong day gay , 511 ngao vung trisu ven bo bien B~c Vi~t Nam BAF cua ngao trung binh nam v6i OCPs (58,07) cao hon PCBs (55,20) khoang 1,05 IAn Tuy thuoc van d~c di~m m6i vung trieu ven b e ma BAF t6ng s6 cua OCPs va PCBs nhan gia trj tit 28,02 - 269,36 K€t qua xac dinh BAF cho thAy, s\!' khac bi~t v~ mire tich tu sinh hoc cua chAt nhi~m htru co bSn a vung tri~u ven bo bi~n giua hai khu V\1C chau th6 song H6ng va Dong B~c B~c BO, hinh TCHH, T 51(6ABC), 2013 D U Ig Thanh Nghi va c o n g su' KHCN Viet Nam Bao cao kit qua quan trde moi truong H~ s6 BAF d6i voi OCPs va PCBs cua ngao eho bien yen bo phia Bdc Vi~t Nam nom 2011 (20 II) , thfry nhiSm moi tnrong mroc va trAm B ~ Tai n g u y e n va Moi tnrong, QCVN 10:20081BTNMT vd b o bi~n Biie Vi~t Nam tieh vung tri~u venedcbaZYXWVUTSRQPONMLKJIHGFEDCBA CMt IUQ71gnutrc bien yen btr (200S) mot tang, d6 PCBs e6 mire tang eao hon Canada Environment Agency Canadian Environmental Di~u d6 dinh hirong eho cac nha nghien ciru, cac nha Quality Guidelines Summary of Existing Canadian quan ly viec ngan ngira S\I phat thai OCPs va Environmental Quality Guldlines (2 0 ) PCBs vao rnoi tnrong, D3 Quang Huy, Duong Thanh Ngh] Xac dinh du luang hoa cMt bao v~ thuc v.;2t mJu moi tr u o n g bJng phuong phap sdc kf khl, Tap chi Moi tnrong, Dai hoc Khoa hoc TI,!nhien, DHQGHN, 6, 20-25 (2001) P l8A F (O C P s) 88A F (P C S s) Duong Thanh Nghi, Pham T h i Kha, Cao T h i Thu Trang, L C Van Nam Nguy co tlch II/ Polychlorbiphenyl mot s6 sinh v91 bdn yen bo Vi~t Nam K y y~u HQi nghj Khoa h o c 35 narn Vien KHCN Viet Narn, Nxb Khoa h o c T v nhien v a TBnmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA Cong nghe, 199-204 (20 I0) .8A F (p~$) MC TY Ii C.Tray C,TB C, BL C,Day 6, Hinh 4: H~ s6 tich tv BAF cua ngao voi OCPs, PCBs a vung tri~u ven b o bien BAe Vi~t Nam Chfrt nhiBm hiru C(Jb~n OCPs va PCBs c6 m~t d6ng thai ba hQ'P phk m6i tnrong mroc, tr~m a vung tri~u ven bo bien B~e Viet tich va sinh v~tZYXWVUTSRQPONMLKJIHGFEDCBA Nam vao eel mua khd va mua mira Nong dQ OCPs ba h o p phan tren nrong irng la 19,53 ngIL, 1,19 ng/g, 7,90 ng/g; voi PCBs la 104,31 ng/L, 2,20 ng/g, 82,11 ng/g Phan b6 OCPs va PCBs e6 tinh chfrt mua, nhirng e6 S\I khac tung hQ'P ph~n moi tnrong va khu V\Ie nghien ciru S\I phan b6 va tich tv OCPs va PCBs ca ba hQ'P ph~n phu thuoc nhieu vao ngucn mroc cac vung trieu ven bo bien ti~p nhan va dong chay day H~ s6 tich tv sinh hoc (BAF) cua t6ng chAt nhiSm htru C(J b8n OCPs va PCBs cua ngao tir 28,02 d~n 269,36; h~ s6 BAF cua ngao trung binh nam voi OCPs la 58,07 va PCBs la 55,20 I Vien Hi Duong Thanh Ngh], TrAn Due Thanh, Trdn Van Quy, D6 Quang Huy Danh gia kha nang tlch II/ sinh hoc PCBs va PAHs \lUng H(I Long Tuyen t~p b a o c a o Hoi n g h ] Khoa hoc va C o n g n g h e bien T o a n qu6c IAn th rr V, Nxb Khoa hoc TI,!nhien va Cong nghe, 77-84 (2011), Duong Thanh Nghj, TrAn Duc Th~h, Trin Van Quy Danh' gia kha ruing tich flI PCBs vung bi€n yen M H a i P h o n g , Tap chi Phan tich H6a, Ly va Sinh hoc, t~p 16, se 4/2011, 27-31(2011) 10, Duong Thanh Nghi, DO Thi Viet Huong, Nguyen Hoang Toan, DO Quang Huy Tich III Policlobiphenyl iI cac vung cUa song yen biin thuoc dia phdn ph6 Tap chi Khoa h o c TI,! n h ie n v a C o n g n g h e H ill P h rJ llf!" (4 ) 15J· 160(2012) 11 Duong Thanh Ngh], TrAn Duc Thanh, TrAn Vi\n Quy PhO.1I' b6 va tich II/ cMt nhiim him co bin OCPs VA PCBs \lUng bi€n yen bo p h ia Biic Vi~t Nam, Tap chi Khoa hoc va Cong nghe bien, 13(1),66-73(2013) 12 Vien Hi nguyen Moi tnrong Bien Bao cao khoa hoc: Xay: dung phuong phdp phdn tlch du luong hoa chat bao thuc vQI Irong mdu sinh vQt bien (2001) 13 US EPA v~1 Great Lakes Water Quality Initiative technical; support document for the procedure 10 determine EPA-S20-S-005, N T IS bioaccumulalion fa c to rs KHAo nguyen va Moi tnrong Vien Tai nguyen va Moi tnrong bi~n Bao cao khoa hoc di tai c6p phtS Hai 'Phong: Danh g ia kha ruing tlch tu cheft nhiim him co bin va kim loai niing m6i trucng nuac, trdm ttch va sinh vQt yen biin Hai P h o n g (20 10) a S KETLUAN T AI Ln;:U THAM Vien Hi n g u y e n va Moi tnrong bien Bao cao khoa hoc dd tai cdp Vi~n KHCN Vi~t Nam: N~hiin C U u sv tlch tl/ PAH~, PCBs moi tr u o n g nuac, tram tlch, sinh v.;2tvung bien yen bo, dJ xuat giai poop quan Iy , ngan ngita ngIfY co tlch II/ moi tr u im g bien (3 \lUng diem Bac, Trung, Nam) (2 0 ) Bien, Vi en Han lam PB95187290, 185pp (1995) Lien h¢: DuongBA T h a n h Nghj Vi~n Tai Nguyen va Moi Truong Bien, Vi~11Han lam Khoa hQCva Cong nghe Vi~t Nam 18 Hoang Quoc Vi~t, C~u Giay, Ha N¢i Email: nghidt@imer.ae.vn 512 VI~N BA H A N LA M Tap K H O A chi H 6a edcbaZYXWVUTSRQPONMLKJIHGFEDCBA v A C O N G NGH~ VI~T N A M hoc, T , s 6 A B C - H Q C MVCLVC TABLE OF CONTENTSnmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA Trang Nghien ciru anh hu6n~ cua cac loai chAt gia cuong d~n tinh chAt co hoc va kha nang cham chay cua v~t li~u polyme compozit n~n nhua epoxy epikote 240 Study of the effects of reinforce fibers on the mechanical and flame-retardant polymer composite materials based on epoxy epikote 240 matrix Nguyin properties of Tu&n Anh, Bach Trong Phuc, Trdn Vinh Dieu Cac chAt norditerpenoid phan l~p tu loai san hO mem Sinularia maxima Norditerpenoids from the Vietnamese soft coral Sinularia maxima Pham TM Tung, Nguyin Phuong ts» u Duc Dgt, Ninh Thi Ngoc, va Anh Tu, CMu Ngoc Di?p, Trdn Thu Huang, Nguyin ZYXWVUTSRQPONMLKJIHGFEDCBA X u d n C u im g , Nguyin H o a i Nam, Phan van K ie m , Young Ho Kim, Chdu Van Minh Cac hop chAt steroit phan l~p nr loai bi~n Astropecten polyacanthus 10 Srcr ords from the starfish Astropecten polyacanthus Nguyln Xudn Trim Thi H o n g Hgnh, Nguyen Phuong is» u Duc Dgt, Ninh Thi Ngoc, Phan Thi Thanh Huang, va Anh Tu, CMu Ngoc Diep, Nguyin Tdn Dat, Ciarng, Nguyen H o a i Nam, Phan Van K ie m , Young Ho Kim, CMu Van Minh Cac hop ch~t furanoditerpinoid Furanoditerpinoids phan l~p tu cay Hoang dAng Fibraurea tinctoria Lour 14 from the plant Fibraurea tinctoria Ninh Thi Ngoc, Pham Thi Mai Huang, Trdn My L in h , Le Quynh Lien, va Huang Giang, Nguyln Xudn Cutrng, Nguyln H o a i Nam, Luu Dam Cu, Ninh Khdc Ban, Chdu Van Minh Nghien ciru phin h6a hoc cua ch6i nhanh cay hroc vang Callisia fragrans Woods (Lindl.) 18 Phc1n I Mot s6 ecdysteroit nr ch6i nhanh cay Investigation on the chemical constituent of Callisiafragrans (Lindl.) Woods Part Ecdysteroids from the branch buds of Callisia fragrans Nguyen Thi Minh H a n g , Nguyln Thi T u Oanh, Cao Thi H u e , H a Thi Thoa, Trdn H iiu Giap, Le Nguyen Thanh, CMu Van Minh, Nguyin Van Hung Nghien ciru phin hoa hoc cay ngai rung (Artemisia roxburghiana BESS., Asteraceae) 23 Study of chemical constituents of artemisia roxburghiana bess (asteraceae) Trdn Thi Thanh Nhan, Phan T6ng San, Phan Minh Giang Ap dung phirong phap ph6 kh6i hrong vi~c xac dinh du true cua acetogenin tit qua cay giac d~ dai to Goniothalamus macrocalyx ban ho.Na (Annonaceae) Application of mass spectrometry for structure elucidation of acetogenins from the fruits of 31 103 T6ng hop, d~c tnrng va danh gia hoat tinh quang xuc tac cua v~t li~u nano Ti02 t6ng hop bang phuong phap sol gel h6 tro sieu am Synthesis, characterization and catalytic performance of modified Ti02 assisted sol-gel method.ZYXWVUTSRQPONMLKJIHGFEDCBA uitrasoruc bien tinhBA nanoparticles 471 by N g u y e n nmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA Thi Thu Irang, N g u y e n Va,! Hdu Trdn Quang Vinh, Pham Tudn Nguyen H o n g Khdnh, Linh, Nguyen Minh Tan Fumiaki Amana L e Thi H o a i Nam 104 ChS tao di~n cue paste 6ng nano cacbonedcbaZYXWVUTSRQPONMLKJIHGFEDCBA b ie n tinh bang Bi203 va irng d u n g xac dinh ham IUQ'Og sieu v€t cadimi (Cd ) m~u nU th~p Simulation of adsorption enhanced production at low temperature Steam 488 - methane reforming for green 492 hydrogen Cong Ngoc Thdng, Nguyln Thi Minh Hien, Pham Trung Kien 107 Khao sat mQt s6 ySu t6 anh huang dSn qua trinh san xu~t hydro tir rnetan tren M thiet b] ph an ung dem c6 d jn h co tang cuong qua trinh hAp phu Study on several experimental parameters of adsoption for hydrogen production on a Fixed-bed reactor enhanced Steam methane 498 reforming Cong Ngoc Thdng II)X CtILich~ tao va tinh ch~t vat lieu polyme compozit nhua A B S /P Y C /b a n rnach dien nr thai bo N g h ie n Studying on preparing and properties of thermoplastic plasticlPVC plastic/printed circuit board wastes nhiet deo tren composite £J6 Quang Trung, B u i Duy Cam, Doan Van Hutrng, Trdn CO' sa cac blend tLr based on the blends of ABS Xudn Tin Nguyin Vii Giang 109 Phan b6 va tich tu ch~t nhiSm htru co b~n OCPs va PCBs ' vung tri~u ven bo biSn b~c Vi~t Nam Distribution Vietnam and accumulation of OCPs and PCBs in the intertidal Duong Thanh N g h i, zone of coastal 509 North Trdn £JU'cThgnh, £J6 Thi Vi?! H u a n g I 10 Danh gia kha nang hAp phu ion Cd2+ va Ni2+ cua hydroxyapatite XII 504 diroc di~u chS tir vo so 513 ... (OCPs) and PCBs were determined in three components of the inter-tidal zone of coastal North Vietnam, include water, sediments and tissues of Clam (Meretrix lyrata) in March and August, 2012 The. .. ng/g, 7.90 ng/g and PCBs was 104.31 ng/L, 2.20 ng/g, 82.11 ng/g The pollutant distribution of total OCPs and PCBs in the three environment components of the intertidal zone of coastal North Viemam... varied by the seasons The bioaccumulation factor (BAF) of the total OCPs and PCBs for Clam was in the range from 28.02 to 269.36 The BAF value ofOCPs and PCBs for Clam was respectively 58.07 and 55.20