Metode ispitivanja dinamike složenih reakcionih sistema
|
|
- Tabitha Walker
- 5 years ago
- Views:
Transcription
1 Metode ispitivanja dinamike složenih reakcionih sistema Ljiljana Kolar-Anić i Željko Čupić Sadržaj I predavanje (Ljiljana Kolar-Anić) 1. Složeni reakcioni sistemi (Linearni i nelinearni reakcioni sistemi, Nelinearni reakcioni sistemi sa povratnom spregom) 2. Dinamičke strukture složenih reakcionih sistema i samoorganizacija neravnotežnih sistema 3. Modeliranje složenih reakcionih sistema II predavanje (Željko Čupić)
2 Metode ispitivanja dinamike složenih reakcionih sistema Ljiljana Kolar-Anić i Željko Čupić Sadržaj I predavanje (Ljiljana Kolar-Anić) 1. Složeni reakcioni sistemi (Linearni i nelinearni reakcioni sistemi, Nelinearni reakcioni sistemi sa povratnom spregom) 2. Dinamičke strukture složenih reakcionih sistema i samoorganizacija neravnotežnih sistema 3. Modeliranje složenih reakcionih sistema II predavanje (Željko Čupić)
3 Svi reakcioni sistemi, pa i složeni reakcioni sistemi dele se na Linearne i Nelinearne
4 Linearni reakcioni sistemi A X k 1 k 1 k2 k 2 X P ( v = k a, v = k x) ( v = k x, v = k p) (A P) a) Ravnotežno stacionarno stanje, t, v 1 = v -1 i v 2 = v -2 k k k1k2 x = a = p => k k eq 1-2 k eq -1 k eq = p a eq eq b) Neravnotežna stacionarna stanja, 0 < t < dx dt dx d ( ) = k a + k p k + k x kx λ kx = 0, s t = λ => s x = λ k
5 Linearni i nenlinearni reakcioni sistemi x s = f(λ) x s = funkcija stanja (steady state concentration of x) λ = kontrolni parametar koji označava udaljenost sistema od ravnotežnog stanja x s (a) Linearna zavisnost, Monostabilnost x s (b) Nelinearna zavisnost, Monostabilnost x s (c) Nelinearna zavisnost, Multistabilnost λ 1 λ 2 λ
6 Nelinearni reakcioni sistemi k 1 A + 2X 3X X k k k P ( v = k ax, v = k x ) ( v = k x, v = k p) (A P) a) Ravnotežno stacionarno stanje, t, v 1 = v -1 i v 2 = v -2 x k a k = = p k1k p 2 eq => = k k a 1 2 eq eq eq k 1 k2 1 2 eq b) Neravnotežna stacionarna stanja, 0 < t < dx 2 3 = k1ax k 1x k2x + k 2 p dt dx 3 x x => dt = + µ + λ x 3 s µ xs λ = 0
7 Linearni i nenlinearni reakcioni sistemi x s = f(λ) x s = funkcija stanja (steady state concentration of x) λ = kontrolni parametar koji označava udaljenost sistema od ravnotežnog stanja x s (a) Linearna zavisnost, Monostabilnost x s (b) Nelinearna zavisnost, Monostabilnost x s (c) Nelinearna zavisnost, Multistabilnost λ 1 λ 2 λ
8 (a) Uticaj parametara sistema µ i λ na neravnotežna stacionarna stanja intermedijera x s ; (b) Presek u x s -λ ravni kada je µ = const. > 0. (c) Presek u x s -µ ravni kada je λ = const.< 0. (d) Presek u x s -µ ravni kada je λ = 0. x s 0 (b) λ 0 λ 1 2 λ x s (a) x s 0 (c) 0 µ (d) x s 0 0 µ λ Bifurkacioni dijagrami 0 µ
9 Fazni prostor i vremenska evolucija oscilatornog sistema
10 Linearni i nelinearni reakcioni sistemi i povratna sprega (feedback) Linearni k 1 A X k k k X P Sumarna reakcija u oba slučaja: A P Nelinearni k 1 A + 2X 3X X k 1 k2 P k 2 Ravnotežno stacionarno stanje: k p 1k2 = k k a eq 1 2 eq k p 1k2 = k k a eq 1 2 eq Neravnotežna stacionarna stanja: ( ) dx / dt = k a + k p k + k x = λ kx x s = λ k dx / dt = k ax k x k x + k p 3 = x + µ x + λ 3 s x µ x λ = 0 s
11 Povratna sprega je opšti naziv za fenomen u kome produkt nekog procesa utiče na brzinu svoga nastajanja u pozitivnom ili negativnom smislu R X Y P Primeri direktne povratne sprege u hemijskim reakcijama: X + 2Y 3Y X + 2Y Y autokataliza autoinhibicija Povratna sprega je prisutna skoro svuda; tako i u nekim hemijskim sistemima, uglavnom svim biohemijskim sistemima, i u svim društvenim sistemima.
12 Dinamičke strukture složenih reakcionih sistema Sistemi izvedeni iz ravnoteže se mogu samoorganizovati na načine nesvojstvene polaznom stanju. Tako se pokazuje da neravnoteža može postati izvor reda i da nepovratni procesi mogu voditi novom tipu dinamičkih stanja materije koji se nazivaju disipativne strukture * *Citat iz predavanja: Ilya Prigogine, Time, Structure and Fluctuations, Nobel Lecture in chemistry, Dinamičke strukture složenih reakcionih sistema možemo podeliti na: 1. Vremenske 2. Vremensko-prostorne
13 Metode ispitivanja dinamike složenih reakcionih sistema Ljiljana Kolar-Anić i Željko Čupić Sadržaj I predavanje (Ljiljana Kolar-Anić) 1. Složeni reakcioni sistemi (Linearni i nelinearni reakcioni sistemi, Nelinearni reakcioni sistemi sa povratnom spregom) 2. Dinamičke strukture složenih reakcionih sistema i samoorganizacija neravnotežnih sistema 3. Modeliranje složenih reakcionih sistema II predavanje (Željko Čupić)
14 U hemiji I fizičkoj hemiji 1. Razlaganje malonske kiseline katalizovano bromatnim i metalnim jonima (Belousov-Zhabotinsky oscilatorna reakcija) - + Fe ili Ce BrO +3CH (COOH) +2H 2CHBr(COOH) +3CO +2H O [MA] 0 = mol/l [MA] 0 = mol/l [MA] 0 = mol/l S. M. Blagojević, S. Anić, Ž. Čupić, N. Pejić, Lj. Kolar-Anić, Phys. Chem. Chem. Phys., 10, (2008) Fotografije reakcionog rastvora BŽ oscilatora sa feroinom u različitim trenucima evolucije. (Slika preuzeta iz Zhabotinsky-Reaction.
15 U hemiji I fizičkoj hemiji 1. Razlaganje malonske kiseline katalizovano bromatnim i metalnim jonima (Belousov-Zhabotinsky oscilatorna reakcija) - + Fe ili Ce BrO +3CH (COOH) +2H 2CHBr(COOH) +3CO +2H O [MA] 0 = mol/l [MA] 0 = mol/l [MA] 0 = mol/l S. M. Blagojević, S. Anić, Ž. Čupić, N. Pejić, Lj. Kolar-Anić, Phys. Chem. Chem. Phys., 10, (2008) Radenković, M., Diplomski rad; Univerziteta u Beogradu, Beograd, 1990.
16 2. Katalitička oksidacija CO do CO 2 na površini platine i formiranje složenih struktura na granici faza Prof. dr Gerhard Ertl, dobitnik Nobelove nagrade za hemiju godine, posvetio je svoj naučni rad ispitivanju tipičnih fizičkohemijskih reakcionih sistema, konkretno, kompleksnih procesa i samoorganizacionih pojava na površiničvrstih tela. Grafički prikaz procesa koji se dešava na katalizatoru u automobilu i prikaz načina na koji se odvija oksidacija CO.
17 Prof. dr Gerhard Ertl Katalitička oksidacija CO do CO 2 na površini platine i formiranje složenih struktura na granici faza. (Eksperimentalna ispitivanja) Oscilatorna promena brzine formiranja CO 2 na Pt (110) u toku vremena. T = 470 K, p CO = mbar. Strelica označava trenutak brze promene parcijalnog pritiska kiseonika. Putujući spiralni talasi snimljeni tehnikom fotoemisione elektronske spektroskopije (PEEM); T = 448 K; p CO = 4, mbar; p kiseonika = mbar. Dijametar slike je 500 µm. Nettesheim, S., von Oertzen, A., Rotermund, H. H., Ertl, G., J. Chem. Phys., 98 (1993.), 9977.
18 U biologiji Oscilatorna evolucija bioelektričnog potencijala citoplazme ćelije slatkovodne alge Nittela mucronatta Bioelectric potential / mv Time / min Rasprostiranje (širenje) kolonije lišajeva
19 U Klimatologiji (Meteorologiji)
20 Najinteresantnije dinamičke strukture u vremenu kao što su multistabilnost, prosto oscilatorno dinamičko stanje, oscilacije mešanih modova i haos, posmatraćemo malo detaljnije na reakciji razlaganja vodonikperoksida u prisustvu jodatnog i vodoničnog jona, + 3 IO, H H O 2H O + O poznatoj pod nazivom Bray-Liebhafsky (BL) oscilatorna reakcija.
21 Zašto analiziramo Bray-Liebhafsky reakciju? To je nelinearna reakcija sa povratnom spregom, naizgled veoma jednostavna, ali složena, mada ne tako složena kao što je to bilo koja biohemijska reakcija.
22 U ovoj složenoj homogenoj katalitičkoj reakciji (ili, bolje, procesu) učestvuju brojni intermedijeri kao što su I 2, I, HIO, HIO 2 i drugi. Globalna reakcija (D) je rezultat redukcije (R) jodata do joda i oksidacije (O) joda do jodata po složenoj reakcionoj šemi: IO 2H 5H O I 5O 6H O (R) I 5H O 2IO 2H 4H O (O) net : 2H2O2 2H2O + O 2 (D) Ako je v R = v O, monotono razlaganje. Ako je periodično v R > v O i v R < v O, oscilatorno razlaganje. O 2 / cm3 R R R R O O O R I References: R O (a) and (b): Bray, W. C. J. Am. Chem. Soc. 1921, 43, I 2 x10 4 / mol dm -3 R O R O R O R O R H 2 O 2 (c) and (d): Ćirić, J.; Anić, S.; Čupić, Ž.; Kolar-Anić, Lj. Science of Sintering 2000, 32, 187.
23 Monotona evolucija koncentracije reaktanta R, produkta P i intermedijera X i Y u slučaju reakcije R X Y P koncentracija / mol dm , R 0.8, 0.6, 0.4, 0.2, X 0.0, Y P vreme / min
24 Eksperimentalna ispitivanja Vremenska evolucija BL reakcionog sistema generisana u dobro mešajućem zatvorenom reaktoru. Anić, S. Nepublikovani eksperimentalni rezultati Anić, S.; Kolar-Anić, Lj. Ber Bunsenges Phys. Chem. 1986, 90, Anić, S.; Mitić, D. J. Serb. Chem. Soc. 1988, 53, 371. S.Anić, Lj.Kolar-Anić, D.Stanisavljev, N.Begović, D.Mitić, React.Kinet.Catal.Lett., 43, (1991).
25 Eksperimentalna istraživanja se izvode u zatvorenom i otvorenom reaktoru Eksperimentalna istraživanja u zatvorenom reaktoru smo upravo videli. Šema otvorenog ili protočnog reaktora sa mešalicom.
26 Eksperimentalna ispitivanja Vremenska evolucija BL reakcije u dobro mešajućem otvorenom reaktoru. (a) 60.0 C (b) 58.8 C (c) 57.5 C (d) 55.6 C (e) 54.4 C (f) 52.8 C (g) 50.3 C (h) 49.8 C (i) 49.3 C (j) 48.8 C (k) 47.8 C (l) 47.6 C Vukojević, V.; Anić, S.; Kolar-Anić, Lj. J. Phys. Chem. A 2000, 104,
27 Metode ispitivanja dinamike složenih reakcionih sistema Ljiljana Kolar-Anić i Željko Čupić Sadržaj I predavanje (Ljiljana Kolar-Anić) 1. Složeni reakcioni sistemi (Linearni i nelinearni reakcioni sistemi, Nelinearni reakcioni sistemi sa povratnom spregom) 2. Dinamičke strukture složenih reakcionih sistema i samoorganizacija neravnotežnih sistema 3. Modeliranje složenih reakcionih sistema II predavanje (Željko Čupić)
28 Ako želimo da objasnimo različita dinamička stanja složenih sistema, a i da predvidimo njihovo ponašanje, treba da postuliramo model mehanizma. U tu svrhu, pored eksperimentalnih ispitivanja, mi vršimo i različita teorijska izračunavanja zajedno sa numeričkim simulacijama.
29 Teorijska proučavanja (Kvantna hemija, Statistička termodinamika, Hemijska reaktivnost) Begović, N.; Marković, Z.; Anić, S.; Kolar-Anić, Lj. J. Phys. Chem. A 2004, 108, 651. Begović, N.; Marković, Z. In Selforganization in Nonequilibrium Systems, Eds. Anić, S.; Čupić, Ž.; Kolar-Anić, Lj. SPCS, Belgrade 2004, p. 215.
30 Teorijska proučavanja (Analiza stehiometrijskih mreža, Analiza stabilnosti i osetljivosti) Model mehanizma Bray-Liebhafsky reakcije IO + I + 2H HIO + HIO (R1),(R 1) HIO I H I O H O (R2) I O + H O 2HIO (R3),(R 3) HIO + I + H I + H O (R4),(R 4) HIO + H O I + H + O + H O (R5) I O + H O HIO + HIO (R6) HIO H O IO H H O (R7) IO H H O HIO O H O (R8) Schmitz, G.; J. Chim. Phys. 1987, 84, 957. Kolar-Anić, Lj.; Schmitz, G. J. Chem. Soc. Faraday. Trans. 1992, 88, Kolar-Anić, Lj.; Mišljenović, Đ.; Anić, S.; Nicolis, G. React. Kinet. Catal. Lett. 1995, 54, 35.
31 Reakcioni putevi koji daju sumarne reakcije R, O i D Reakcioni putevi (R2) + (R5) + (R6) (R1) + (R5) + (R7) (R-1) + (R2) + (R6) + (R8) (R7) + (R8) 2x(R1) + 2x(R2) + 2x(R3) + (R4) + 5x(R5) 3x(R-1) + 2x(R2) + 2x(R3) + (R4) + 5x(R8) 2x(R2) + 2x(R3) + (R4) + 3x(R5) + 2x(R8) 2x(R-1) + 3x(R2) + 2x(R-3) + (R-4) +5x(R6) (R1) + 2x(R-3) + (R-4) + 2x(R6) + 3x(R7) (R2) + 2x(R-3) + (R-4) + 3x(R6) + 2x(R7) Sumarna reakcija (D) (R) (O) Uslov nestabilnosti (Aproksimativni izraz) k k k [H O ] k k k 2 > k k k k k k k [H O ] Kolar-Anić, Lj.; Čupić, Ž.; Anić S.; Schmitz, G. J. Chem. Soc. Faraday Trans. 1997, 93, Kolar-Anić, Lj.; Mišljenović, Đ.; Anić, S.; Nicolis, G. React. Kinet. Catal. Lett. 1995, 54, 35.
32 Numeričke simulacije BL reakcije u zatvorenom reakcionom sistemu C / mol dm x x10-3 [H 2 O 2 ] x x x [I 2 ] 5.0x10-4 [O 2 ] S.Anić, Lj.Kolar-Anić,, Ž. Čupić, N. Pejić, V.Vukojević Svet Polimera, 4, 55-66, (2001).C G.Schmitz, Lj.Kolar-Anić, S.Anić, Ž. Čupić J. Chem. Edu., 77, (2000).
33 Numeričke simulacije BL reakcije u otvorenom reakcionom sistemu 6.0x10-8 [I - ] / mol dm -3 [I - ] / mol dm -3 [I - ] / mol dm -3 [I - ] /mol dm x x x x x x x x x x x t / min x10-8 t / min t / min t / min [I - ] / mol dm x x t / min Lj. Kolar-Anić, T. Grozdić, Ž. Čupić, G. Schmitz, V. Vukojević, S.Anić, In Selforganization in Nonequilibrium Systems, SPCS, Beograd p.115
34 Put u haos preko udvajanja perioda j 0 = min 1 j 0 = min 1 j 0 = min 1 j 0 = min 1 j 0 = min 1 (haos)
35
36 Slučaj x x HIO (I-) x I H2O time 4.2 x x HIO 3.8 HIO H2O I x I x 10-4
37 Ako znamo da modeliramo Bray-Liebhafsky reakciju ili bilo koju drugu oscilatornu reakciju, mi možemo modelirati i druge kompleksne reakcione sisteme i predvideti samoorganizacione pojave u njima. Zašto modeliramo složene reakcione sisteme? I Modeliranjem je moguće predvideti ponašanje sistema i nastajanje različitih dinamičkih struktura. II Modeliranje je jedan od načina ispitivanja mehanizma složenog procesa.
38 Primer 1. Katalitičko razlaganje azot suboksida (N 2 O) u azot (N 2 ) i kiseonik (O 2 ) na zeolitu Cu-ZSM-5 u otvorenom reaktoru concentration /ppm Ochs, T, Turek, T., Chemical Engineering Science, 54 (1999) time / s
39 Primer 2. Modeliranje kompleksnog ekološkog procesa: Formiranje jodnih aerosola u priobalju mora 1. N. Begović, Z. Marković, S. Anić and Lj. Kolar-Anić Environmental Chemistry Letters, 2(2), (2004)
40 Primer 3. Modeliranje jednog biohemijskog procesa: Oscilatorna evolucija kortizola u neuroendokrinom sistemu Adrenal cortex CRH = kortikotropni oslobađajući hormon ACTH = adrenokortikotropin CORT = kortizol (Glukokortikoidni hormon) ALDO = aldosteron (Mineralokortikoidni hormon) P 1 i P 2 su produkti Cortisol concentration / nmol dm -3 Daily rhythm in dimensionless form Cortisol concentration / nmol dm (a) Time / hour (b) Time / hour (c) Time / hour S. Jelić, Ž. Čupić, Lj. Kolar-Anić, Mathematical Biosciences, 197 (2005)
41 Oscilatorna evolucija koncentracije kortizola pod stresom Perturbacije osnovne funkcije su rađene u četiri različite faze jednog nočnog i jednog dnevnog pika Cortisol concentration nmol dm A B C D Time / hour Cortisol concentration nmol dm AB C D Time / hour Cortisol concentration / nmol dm Time / hour Smiljana Jelić, Željko Čupić, Ljiljana Kolar-Anić, MODELLING OF THE HYPOTHALAMIC-PITUITARY-ADRENAL SYSTEM ACTIVITY BASED ON THE STOICHIOMETRIC ANALYSIS In New Research on Neurosecretory Systems, Eds. E.Romano, S. De Luca, Nova Science Publishers, Inc., New York 2008, pp
42 Perturbacije u različitim fazama dnevnog pulsa (A, B, C i D), ali uvek sa [CRH] = mol/l A Cortisol concentration nmol dm Time / Hours Cortisol concentration nmol dm Time / Hours Cortisol concentration nmol dm Time / Hours Cortisol concentration nmol dm Time / Hours Cortisol concentration nmol dm -3 Cortisol concentration nmol dm B Time / Hours Cortisol concentration nmol dm C D 0 24 Time / Hours Cortisol concentration nmol dm Time / Hours Time / Hours
43 Perturbacije u različitim fazama noćnog pulsa (A, B, C i D), ali uvek [CRH] = mol/l Cortisol concentration nmol dm Time / Hours Cortisol concentration nmol dm A B Time / Hours Cortisol concentration nmol dm C 0 24 Time / Hours Cortisol concentration nmol dm D Cortisol concentration nmol dm -3 Cortisol concentration nmol dm -3 Cortisol concentration nmol dm -3 Cortisol concentration nmol dm -3 Time / Hours Time / Hours Time / Hours 0 24 Time / Hours Time / Hours
44 Odgovor sistema na perturbacije različitim količinama perturbatora u toku obdanice ( ) i noći ( ). Vremenska evolucija unutardnevnih oscilacija posle perturbovanja sistema sa CRH S. Jelić, Ž. Čupić, Lj. Kolar-Anić, V. Vukojević, International Journal of Nonlinear Sciences & Numerical Simulation 10, 1451 (2009)
45 Initial model of the HPA system activity at humans + cholesterol The proposed model presents simplified picture of complex mechanism of the HPA system activity, with five crucial variables included in it. P 1,..., P 5 are products chormone elimination. k1 k2 k3 CHOL CRH ALDO (R1) (R2) (R3) k4 CRH ACTH k5 CHOL + ACTH CORT (R4) (R5) k6 CHOL + ACTH ALDO (R6) k7 ACTH + 2CORT 3CORT k8 ALDO + 2CORT CORT (R7) (R8) k9 CHOL P (R9) k10 CRH P (R10) k11 ACTH P (R11) k12 CORT 2 1 P 3 ALDO P (R13) k (R12) d[ CHOL] = k 1 (k 5 + k 6)[ CHOL][ ACTH ] k 9[ CHOL] (1) dt d[ CRH ] = k 2 (k 4 + k 10)[ CRH ] (2) dt d[ ACTH ] 2 = k 4[ CRH ] (k 5 + k 6)[ CHOL][ ACTH ] k 7[ ACTH ][ CORT ] k 11[ ACTH ] (3) dt d[ CORT ] 2 2 = k 5[ CHOL][ ACTH ] + k 7[ ACTH ][ CORT ] - k 8[ ALDO][ CORT ] k 12[ CORT ] (4) dt d[ ALDO] 2 = k 3 + k 6[ CHOL][ ACTH ]- k 8[ ALDO][ CORT ] k 13[ ALDO] (5) dt
46 Mnogo više o ispitivanju dinamike složenih reakcionih sistema, može se naći u knjizi: Ljiljana Kolar-Anić, Željko Čupić, Vladana Vukojević, Slobodan Anić Dinamika nelinearnih procesa (Fakultet za fizičku hemiju, Univerzitet u Beogradu, Beograd 2011) Hvala na pažnji.
Dr Željko Čupić, Principal Research Fellow
Dr Željko Čupić, Principal Research Fellow - Chairmen of the Scientific Committee - Institute of Chemistry, Technology and Metallurgy Center of Catalysis and Chemical Engineering Njegoševa 12, 11000 Belgrade,
More informationLjiljana Kolar-Anić, Curriculum Vitae
PERSONAL PARTICULARS Name: Ljiljana Kolar-Anić Date of birth: 22. 08. 1947. Place of birth: Virovitica, Yugoslavia, Croatia Civil Status: Married. Two children. CONTACT Office: Faculty of Physical Chemistry
More informationUTICAJ KOBALTA NA NOSAČU KOPOLIMERU POLI 4 VINILPIRIDINA I DIVINILBENZENA NA OSCILATORNU EVOLUCIJU REAKCIJE BREJ LIEBHAFSKI
UNIVERZITET U BEOGRADU FAKULTET ZA FIZIČKU HEMIJU Jelena P. Maksimović UTICAJ KOBALTA NA NOSAČU KOPOLIMERU POLI 4 VINILPIRIDINA I DIVINILBENZENA NA OSCILATORNU EVOLUCIJU REAKCIJE BREJ LIEBHAFSKI doktorska
More informationStoichiometric Network Analysis and Associated Dimensionless Kinetic Equations. Application to a Model of the Bray-Liebhafsky Reaction
University of Belgrade From the SelectedWorks of Zeljko D Cupic 2008 Stoichiometric Network Analysis and Associated Dimensionless Kinetic Equations. Application to a Model of the Bray-Liebhafsky Reaction
More informationNastavno-naučnom veću Fakulteta za fizičku hemiju Univerziteta u Beogradu
Nastavno-naučnom veću Fakulteta za fizičku hemiju Univerziteta u Beogradu Na sednici Nastavno-naučnog veća Fakulteta za fizičku hemiju Univerziteta u Beogradu održanoj 12.02.2015. godine određeni smo za
More informationPredmet:Nove fizičkohemijske metode Tema: Metode ispitivanja dinamike složenih reakcionih sistema
Predmet:Nove fizičkohemijske metode Tema: Metode ispitivanja dinamike složenih reakcionih sistema Predavači: Ljiljana Kolar-Anić i Željko Čupić Sadržaj I čas 1. Složeni reakcioni sistemi 2. Dinamičke strukture
More informationThe temperature dependence of the disproportionation reaction of iodous acid in aqueous sulfuric acid solutions
J. Serb. Chem. Soc. 67(5)347 351(2002) UDC 542.9:546.155+535.243:536.5 JSCS-2955 Original scientific paper The temperature dependence of the disproportionation reaction of iodous acid in aqueous sulfuric
More informationProjektovanje paralelnih algoritama II
Projektovanje paralelnih algoritama II Primeri paralelnih algoritama, I deo Paralelni algoritmi za množenje matrica 1 Algoritmi za množenje matrica Ovde su data tri paralelna algoritma: Direktan algoritam
More informationNELINEARNA DINAMIKA U PRIMENJENIM FIZIČKOHEMIJSKIM PROCESIMA*
ŽELJKO D. ČUPIĆ NU IHTM, Univerzitet u Beogradu, Centar za katalizu i hemijsko inženjerstvo, Beograd PREGLEDNI RAD UDK 544.47:544.344 DOI: 10.2298/HEMIND0905445C NELINEARNA DINAMIKA U PRIMENJENIM FIZIČKOHEMIJSKIM
More informationHemijska ravnoteža se dostiže kada su: brzina direktne i povratne reakcije jednake i koncentracije reaktanata i proizvoda konstantne
HEMIJSKA RAVNOTEŽA Hemijska ravnoteža se dostiže kada su: brzina direktne i povratne reakcije jednake i koncentracije reaktanata i proizvoda konstantne Mehanička (stabilna, labilna, indiferentna) Statička
More informationThe oxidation of iodine to iodate by hydrogen peroxide
The oxidation of iodine to iodate by hydrogen peroxide Guy Schmitz Faculte des Sciences Applique es, Universite L ibre de Bruxelles, CP165, Av.F.Roosevelt 50, 1050 Bruxelles, Belgium. E-mail: gschmitz=ulb.ac.be
More informationReactions at solid surfaces: From atoms to complexity. Gerhard Ertl Fritz Haber Institut der Max Planck-Gesellschaft Berlin, Germany
Reactions at solid surfaces: From atoms to complexity Gerhard Ertl Fritz Haber Institut der Max Planck-Gesellschaft Berlin, Germany Jöns Jakob Berzelius 1779 1848 Wilhelm Ostwald 1853 1932 Nobel Prize
More informationDYNAMICS OF THE DUFFING OSCILLATOR WITH IMPACTS UDC: Slavka Mitić
UNIVERSITY OF NIŠ The scientific journal FACTA UNIVERSITATIS Series: Working and Living Environmental Protection Vol. 1, No 2, 1997, pp. 65-72 Editor of series: Ljiljana Rašković, e-mail: ral@kalca.junis.ni.ac.yu
More informationActivity of Polymer Supported Cobalt Catalyst in the Bray-Liebhafsky Oscillator
University of Belgrade From the SelectedWorks of Zeljko D Cupic 29 Activity of Polymer Supported Cobalt Catalyst in the Bray-Liebhafsky Oscillator Zeljko D Cupic, Institute of Chemistry, Technology Metallurgy
More informationPRELIMINARY COMMUNICATION Influence of chloride ions on the open circuit potentials of chromium in deaerated sulfuric acid solutions
J. Serb. Chem. Soc. 71 (11) 1187 1194 (2006) UDC 54 71'131:546.76:620.193:546.226 325 JSCS 3512 Preliminary communication PRELIMINARY COMMUNICATION Influence of chloride ions on the open circuit potentials
More informationZlatko Mihalić MOLEKULARNO MODELIRANJE (2+1, 0+0)
Zlatko Mihalić MOLEKULARNO MODELIRANJE (2+1, 0+0) Asistenti doc. dr. sc. Ivan Kodrin dr. sc. Igor Rončević Literatura A. R. Leach, Molecular Modelling, Principles and Applications, 2. izdanje, Longman,
More informationASYMMETRIC VERSUS SYMMETRIC DEFECTS IN ONE-DIMENSIONAL PHOTONIC LATTICE
ASYMMETRIC VERSUS SYMMETRIC DEFECTS IN ONE-DIMENSIONAL PHOTONIC LATTICE Marija T. Stojanović Krasić* Faculty of Technology, University of Niš, Leskovac, Serbia. (ORIGINAL SCIENTIFIC PAPER) UDC 535.317.2:535.14
More informationON A JERK DYNAMICAL SYSTEM II UDC Sonja Gegovska-Zajkova 1, Ljubiša M. Kocic 2
FACTA UNIVERSITATIS Series: Automatic Control and Robotics Vol. 10, N o 1, 2011, pp. 29-36 ON A JERK DYNAMICAL SYSTEM II UDC 681.5.01 517.93 Sonja Gegovska-Zajkova 1, Ljubiša M. Kocic 2 1 University Ss
More informationHemijska ravnoteža. Poglavlje 2.6 Zakon o dejstvu masa Van t Hofova reakciona izoterma Termodinamički uslov i položaj hemijske ravnoteže
Hemijska ravnoteža Poglavlje 2.6 Zakon o dejstvu masa Van t Hofova reakciona izoterma Termodinamički uslov i položaj hemijske ravnoteže Hemijska ravnoteža Odigravanje neke hemijske reakcije predstavlja
More informationCHEMICAL REACTION EFFECTS ON VERTICAL OSCILLATING PLATE WITH VARIABLE TEMPERATURE
Available on line at Association of the Chemical Engineers AChE www.ache.org.rs/ciceq Chemical Industry & Chemical Engineering Quarterly 16 ( 167 173 (010 CI&CEQ R. MUTHUCUMARASWAMY Department of Applied
More informationRed veze za benzen. Slika 1.
Red veze za benzen Benzen C 6 H 6 je aromatično ciklično jedinjenje. Njegove dve rezonantne forme (ili Kekuléove structure), prema teoriji valentne veze (VB) prikazuju se uobičajeno kao na slici 1 a),
More informationUvod u relacione baze podataka
Uvod u relacione baze podataka Ana Spasić 2. čas 1 Mala studentska baza dosije (indeks, ime, prezime, datum rodjenja, mesto rodjenja, datum upisa) predmet (id predmeta, sifra, naziv, bodovi) ispitni rok
More informationJ. Serb. Chem. Soc. 69 (11) (2004) UDC :54 325:
J. Serb. Chem. Soc. 69 (11) 949 953 (2004) UDC 531.3+541.124:54 325:547.564.8 JSCS 3222 Short communication SHORT COMMUNICATION Kinetics of the reaction of 5-substituted orotic acids with diazodiphenylmethane
More informationANALYSIS OF INFLUENCE OF PARAMETERS ON TRANSFER FUNCTIONS OF APERIODIC MECHANISMS UDC Života Živković, Miloš Milošević, Ivan Ivanov
UNIVERSITY OF NIŠ The scientific journal FACTA UNIVERSITATIS Series: Mechanical Engineering Vol.1, N o 6, 1999 pp. 675-681 Editor of series: Nenad Radojković, e-mail: radojkovic@ni.ac.yu Address: Univerzitetski
More informationConditional stability of Larkin methods with non-uniform grids
Theoret. Appl. Mech., Vol.37, No., pp.139-159, Belgrade 010 Conditional stability of Larkin methods with non-uniform grids Kazuhiro Fukuyo Abstract Stability analysis based on the von Neumann method showed
More informationOregonator model of the Belousov-Zhabotinsky reaction Richard K. Herz,
Oregonator model of the Belousov-Zhabotinsky reaction Richard K. Herz, rherz@ucsd.edu Boris Belousov in the 1950's discovered that a mixture of malonic acid, potassium bromate, and cerium sulfate an acidic
More informationComputational Simulation of Bray-Liebhafsky (BL) Oscillating Chemical Reaction
Portugaliae Electrochimica Acta 26/4 (2008) 349-360 PORTUGALIAE ELECTROCHIMICA ACTA Computational Simulation of Bra-Liebhafsk (BL) Oscillating Chemical Reaction Jie Ren, Jin Zhang Gao *, Wu Yang Chemistr
More informationKinetic study of the reaction between sodium chloroacetate and potassium ethylxanthogenate
J. Serb. Chem. Soc. 72 (2) 89 100 (2007) UDC 551.583:531.3+536.7:546.33'135+547.292 38 JSCS 3538 Original scientific paper Kinetic study of the reaction between sodium chloroacetate and potassium ethylxanthogenate
More informationTemperature dependence of the Kovats retention indices for alkyl 1,3-diketones on a DB-5 capillary column
J. Serb. Chem. Soc. 69 (10) 759 767 (2004) UDC 547.313.442:66 948.3:536.74 JSCA 3202 Original scientific paper Temperature dependence of the Kovats retention indices for alkyl 1,3-diketones on a DB-5 capillary
More informationAIR CURTAINS VAZDU[NE ZAVESE V H
AIR CURTAINS V 15.000 H 21.000 KLIMA Co. 2 KLIMA Co. Flow and system stress should be known factors in air flow. The flow is gas quantity flowing through the system during given time unit and is measured
More informationThe effect of solvent on the kinetics of the oxidation of benzaldehydes by quinolinium chlorochromate in aqueous organic solvent media
J.Serb.Chem.Soc. 67(12)803 808(2002) UDC 547.571:531.3+542.943+547.831 JSCS 3004 Original scientific paper The effect of solvent on the kinetics of the oxidation of benzaldehydes by quinolinium chlorochromate
More informationSTRUCTURAL VEHICLE IMPACT LOADING UDC =111. Dragoslav Stojić #, Stefan Conić
FACTA UNIVERSITATIS Series: Architecture and Civil Engineering Vol. 11, N o 3, 2013, pp. 285-292 DOI: 10.2298/FUACE1303285S STRUCTURAL VEHICLE IMPACT LOADING UDC 624.042.3=111 Dragoslav Stojić #, Stefan
More informationAn alternative method for the determination of siloxane activities toward basic equilibration catalysts
J. Serb. Chem. Soc. 70 (12) 1461 1468 (2005) UDC 678.84:541.121:54 44 JSCS 3384 Original scientific paper An alternative method for the determination of siloxane activities toward basic equilibration catalysts
More informationMass transfer between a fluid and an immersed object in liquid solid packed and fluidized beds
J. Serb. Chem. Soc. 70 (11) 1373 1379 (2005) UDC 66.021.3:66.040.36:66.096.5 JSCS 3377 Original scientific paper Mass transfer between a fluid and an immersed object in liquid solid packed and fluidized
More informationProgramiranje u realnom vremenu Bojan Furlan
Programiranje u realnom vremenu Bojan Furlan Tri procesa sa D = T imaju sledeće karakteristike: Proces T C a 3 1 b 6 2 c 18 5 (a) Pokazati kako se može konstruisati ciklično izvršavanje ovih procesa. (b)
More informationMATHEMATICAL MODELING OF DIE LOAD IN THE PROCESS OF CROSS TUBE HYDROFORMING
Journal for Technology of Plasticity, Vol. 40 (2015), Number 1 MATHEMATICAL MODELING OF DIE LOAD IN THE PROCESS OF CROSS TUBE HYDROFORMING Mehmed Mahmić, Edina Karabegović University of Bihać, Faculty
More informationDependence of the total -electron energy on a large number of non-bonding molecular orbitals
J. Serb. Chem. Soc. 69 (10) 777 782 (2004) UDC 54 724+537.872:519.17:54 12 JSCS 3204 Original scientific paper Dependence of the total -electron energy on a large number of non-bonding molecular orbitals
More informationMathcad sa algoritmima
P R I M J E R I P R I M J E R I Mathcad sa algoritmima NAREDBE - elementarne obrade - sekvence Primjer 1 Napraviti algoritam za sabiranje dva broja. NAREDBE - elementarne obrade - sekvence Primjer 1 POČETAK
More informationTEORIJA SKUPOVA Zadaci
TEORIJA SKUPOVA Zadai LOGIKA 1 I. godina 1. Zapišite simbolima: ( x nije element skupa S (b) d je član skupa S () F je podskup slupa S (d) Skup S sadrži skup R 2. Neka je S { x;2x 6} = = i neka je b =
More informationKinetic analytical method for determination of uric acid in human urine using analyte pulse perturbation technique
University of Belgrade From the SelectedWorks of Zeljko D Cupic 2012 Kinetic analytical method for determination of uric acid in human urine using analyte pulse perturbation technique Zeljko D Cupic, Institute
More informationSELFORGANIZATION IN NONEQUILIBRIUM SYSTEMS
SELFORGANIZATION IN NONEQUILIBRIUM SYSTEMS Society of Physical Chemists of Serbia Belgrade, 004 SELFORGANIZATION IN NONEQUILIBRIUM SYSTEMS Papers from the International Conference in Nonlinear Sciences
More informationNETCHEM Remote Access Laboratory Guide
NETCHEM Remote Access Laboratory Guide Determination of Co(II) ions in homogeneous-catalytic reaction In this exercise, you will: Measure the solution of Universal buffer, sulfanilic acid, hydrogen-peroxide,
More informationDETERMINATION OF THE EFFECTIVE STRAIN FLOW IN COLD FORMED MATERIAL
DETERMINATION OF THE EFFECTIVE STRAIN FLOW IN COLD FORMED MATERIAL Leo Gusel University of Maribor, Faculty of Mechanical Engineering Smetanova 17, SI 000 Maribor, Slovenia ABSTRACT In the article the
More informationMetode praćenja planova
Metode praćenja planova Klasična metoda praćenja Suvremene metode praćenja gantogram mrežni dijagram Metoda vrednovanja funkcionalnosti sustava Gantogram VREMENSKO TRAJANJE AKTIVNOSTI A K T I V N O S T
More informationĐorđe Đorđević, Dušan Petković, Darko Živković. University of Niš, The Faculty of Civil Engineering and Architecture, Serbia
FACTA UNIVERSITATIS Series: Architecture and Civil Engineering Vol. 6, N o 2, 2008, pp. 207-220 DOI:10.2298/FUACE0802207D THE APPLIANCE OF INTERVAL CALCULUS IN ESTIMATION OF PLATE DEFLECTION BY SOLVING
More informationSolvation model for the oxidation of methionine by imidazolium fluorochromate in aqueous acetic acid medium
J. Serb. Chem. Soc. 71 (1) 19 25 (2006) UDC 577.112.386+66.094.3+531.3+541.126 JSCS 3395 Original scientific paper Solvation model for the oxidation of methionine by imidazolium fluorochromate in aqueous
More informationNajbrži procesi Prenos elektrona Prenos H atoma Prenosi drugih atoma izmedju molekula DNK sinteza. dc dt
HEMIJSKA KINETIKA - kojom brzinom se reakcija odvija. - kakav je mehanizam hemijske reakcije koji su koraci koji se dogode tokom promene reaktanata ka produktima. - zajedno sa izučavanjem ravnoteže i termodinamičkih
More informationElektrohemijska oksidacija jodid-jona u vodenim rastvorima
I. P. ĆURČIĆ, M. M. POPOVIĆ, Originalni naučni rad B. N. GRGUR UDC:541.13:661.47.094.3=861 Elektrohemijska oksidacija jodid-jona u vodenim rastvorima U ovom radu ispitivana je elektrohemijska oksidacija
More informationON ORBITS FOR A PARTICULAR CASE OF AXIAL SYMMETRY
Serb. Astron. J. 178 (2009), 29-37 UDC 524.62 334.2 DOI: 10.2298/SAJ0978029N Original scientific paper ON ORBITS FOR A PARTICULAR CASE OF AXIAL SYMMETRY S. Ninković and B. Jovanović Astronomical Observatory,
More informationFTN Novi Sad Katedra za motore i vozila. Drumska vozila Uputstvo za izradu vučnog proračuna motornog vozila. 1. Ulazni podaci IZVOR:
1. Ulazni podaci IZVOR: WWW.CARTODAY.COM 1. Ulazni podaci Masa / težina vozila Osovinske reakcije Raspodela težine napred / nazad Dimenzije pneumatika Čeona površina Koeficijent otpora vazduha Brzinska
More informationCHEMICAL OSCILLATIONS IN HOMOGENEOUS SYSTEMS 1. ESSENTIAL THERMODYNAMIC AND KINETIC CONDITIONS FOR THE OCCURRENCE OF OSCILLATIONS
CHEMICAL OSCILLATIONS IN HOMOGENEOUS SYSTEMS 1. ESSENTIAL THERMODYNAMIC AND KINETIC CONDITIONS FOR THE OCCURRENCE OF OSCILLATIONS Rodica Vîlcu and Daniela Bala abstract: This manuscript reviews the understanding
More informationRešenja zadataka za vežbu na relacionoj algebri i relacionom računu
Rešenja zadataka za vežbu na relacionoj algebri i relacionom računu 1. Izdvojiti ime i prezime studenata koji su rođeni u Beogradu. (DOSIJE WHERE MESTO_RODJENJA='Beograd')[IME, PREZIME] where mesto_rodjenja='beograd'
More informationKinetics and mechanism of the oxidation of methionine by quinolinium chlorochromate
J. Serb. Chem. Soc. 70 (2) 145 151 (2005) UDC 577.112.386:531.3:66.094.3 JSCS 3257 Original scientific paper Kinetics and mechanism of the oxidation of methionine by quinolinium chlorochromate M. PANDEESWARAN,
More informationA L A BA M A L A W R E V IE W
A L A BA M A L A W R E V IE W Volume 52 Fall 2000 Number 1 B E F O R E D I S A B I L I T Y C I V I L R I G HT S : C I V I L W A R P E N S I O N S A N D TH E P O L I T I C S O F D I S A B I L I T Y I N
More informationQUARRY STABILITY ANALYSIS FOR COMPLEX SLIP SURFACES USING THE MATHSLOPE METHOD
Rudarsko-geološko-naftni zbornik Vol. 16 str. 91-96 Zagreb, 2004. UDC 622.1:681.14 UDK 622.1:681.14 Original scientific paper Originalni znanstveni rad QUARRY STABILITY ANALYSIS FOR COMPLEX SLIP SURFACES
More informationSaturated-liquid heat capacity calculation of alkanes
J. Serb. Chem. Soc. 70 (12) 1545 1551 (2005) UDC 547.21+519.6:66 911.4:536.7 JSCS 3390 Original cientific paper Saturated-liquid heat capacity calculation of alanes JOVAN D. JOVANOVI] and DU[AN K. GROZDANI]
More informationThermohemija. Energija. Prvi zakon termodinamike. Entalpija / kalorimetrija
Thermohemija Energija Prvi zakon termodinamike Entalpija / kalorimetrija Hess-ov zakon Kirchoff-ov zakon Prenos toplote U endotermalnom procesu, toplota se uvek prenosi sa toplijeg objekta (okruženja)
More informationIZBORNOM VEĆU FAKULTETA ZA FIZIČKU HEMIJU
IZBORNOM VEĆU FAKULTETA ZA FIZIČKU HEMIJU Na II redovnoj sednici Izbornog veća Fakulteta za fizičku hemiju održanoj 14/11/2013 izabrani smo u Komisiju za pripremu izveštaja o prijavljenim kandidatima na
More information6 th INTERNATIONAL CONFERENCE
6 th INTERNATIONAL CONFERENCE Contemporary achievements in civil engineering 20. April 2018. Subotica, SERBIA ABSOLUTE MOVEMENTS OF LARGE DAMS ANALYSIS BY REGRESSION METHOD UTILIZATION Žarko Nestorović
More informationNON-SPECIFIC METHODS FOR DETECTING RESIDUES OF CLEANING AGENTS DURING CLEANING VALIDATION
Available on line at Association of the Chemical Engineers AChE www.ache.org.rs/ciceq Chemical Industry & Chemical Engineering Quarterly 17 (1) 39 44 (2011) CI&CEQ DRAGAN M. MILENOVIĆ 1 DRAGAN S. PEŠIĆ
More informationVELOCITY PROFILES AT THE OUTLET OF THE DIFFERENT DESIGNED DIES FOR ALUMINIUM EXTRUSION
VELOCITY PROFILES AT THE OUTLET OF THE DIFFERENT DESIGNED DIES FOR ALUMINIUM EXTRUSION J.Caloska, J. Lazarev, Faculty of Mechanical Engineering, University Cyril and Methodius, Skopje, Republic of Macedonia
More informationUTICAJ RASTVARAČA NA FOTODEGRADACIJU SINTETSKE BOJE REACTIVE ORANGE 16 POMOĆU SIMULIRANE SUNČEVE SVETLOSTI
DUŠAN Ž. MIJIN DRAGANA Z. ZLATIĆ GORDANA S. UŠĆUMLIĆ PETAR M. JOVANČIĆ Tehnološko-metalurški fakultet, Univerzitet u Beogradu, Beograd STRUČNI RAD UDK 667.2866.6546.824 3:544.526.5542.92 UTICAJ RASTVARAČA
More informationThe extraction of Zn(II) in aqueous PEG (1550) (NH 4 ) 2 SO 4 two-phase system using Cl ions as extracting agent
J. Serb. Chem. Soc. 72 (3) 289 297 (2007) UDC 66.061+546.47+547.441 036.7:541.12.012 JSCS 3558 Original scientific paper The extraction of Zn(II) in aqueous PEG (1550) (NH 4 ) 2 SO 4 two-phase system using
More informationA Boundary Condition for Porous Electrodes
Electrochemical Solid-State Letters, 7 9 A59-A63 004 0013-4651/004/79/A59/5/$7.00 The Electrochemical Society, Inc. A Boundary Condition for Porous Electrodes Venkat R. Subramanian, a, *,z Deepak Tapriyal,
More informationUNSTABILITY OF FOOD PRODUCTION PER CAPITA AND POPULATION: ASIA. Vesna Jablanović 1
Journal of Agricultural Sciences Vol. 48, No, 003 Pages 7-3 UDC: 330.54:330.368 Original scientific paper UNSTABILITY OF FOOD PRODUCTION PER CAPITA AND POPULATION: ASIA Vesna Jablanović Abstract: The basic
More informationKinetic determination of morin nanoamounts
J. Serb. Chem. Soc. 69 (6) 477 483 (2004) UDC 582.685:543.23 JSCS 3174 Original scientific paper Kinetic determination of morin nanoamounts D. A. KOSTI] *, S. S. MITI] and G. @. MILETI] Faculty of Natural
More information7. Well-Stirred Reactors IV
7. Well-Stirred Reactors IV The Belousov-Zhabotinsky Reaction: Models and Experiments Oregonator [based on the FKN mechanism; Field, R. J. & Noyes, R. M.: Oscillations in chemical systems. IV. Limit cycle
More informationAlgebraic structure count of linear phenylenes and their congeners *
J.Serb.Chem.Soc. 68(4 5)391 399(2003) UDC 517.986.9:547.77 JSCS 3054 Original scientific paper Algebraic structure count of linear phenylenes and their congeners * IVAN GUTMAN # Faculty of Science, University
More informationANALYTICAL AND NUMERICAL PREDICTION OF SPRINGBACK IN SHEET METAL BENDING
ANALYTICAL AND NUMERICAL PREDICTION OF SPRINGBACK IN SHEET METAL BENDING Slota Ján, Jurčišin Miroslav Department of Technologies and Materials, Faculty of Mechanical Engineering, Technical University of
More informationNove fizickohemijske metode. Ivana Radosavljevic Evans Durham University, UK
Nove fizickohemijske metode Ivana Radosavljevic Evans Durham University, UK Nove fizickohemijske metode: Metode zasnovane na sinhrotronskom zracenju Plan predavanja: Difrakcione metode strukturne karakterizacije
More informationExcess molar volume of acetonitrile + alcohol systems at K. Part II: Correlation by cubic equation of state
J.Serb.Chem.Soc. 68(1)47 56(2003) UDC 547.261/.262+547.239:541.24/.25 JSCS 3019 Original scientific paper Excess molar volume of acetonitrile + alcohol systems at 298.15 K. Part II: Correlation by cubic
More informationPhilippe Jodin. Original scientific paper UDC: :519.6 Paper received:
The paper was presented at the Tenth Meeting New Trends in Fatigue and Fracture (NTF0) Metz, France, 30 August September, 00 Philippe Jodin APPLICATION OF NUMERICAL METHODS TO MIXED MODES FRACTURE MECHANICS
More informationNUMERICAL STUDY OF HEAT TRANSFER DURING NUCLEATE POOL BOILING
NUMERICAL STUDY OF HEAT TRANSFER DURING NUCLEATE POOL BOILING Andrijana Stojanović 1*, Vladimir Stevanović 2, Milan Petrović 2, Dragoljub Živković 3, Branislav Stanković 1 1 University of Belgrade, Institute
More informationJ.Serb.Chem.Soc. 68(7) (2003) UDC : : Original scientific paper
J.Serb.Chem.Soc. 68(7)557 564(2003) UDC 547 304.9:543.544.3:66 948.3 JSCS 3073 Original scientific paper Gas chromatograpic retention indices for N-substituted amino s-triazines on capillary columns. Part
More informationTermodinamika. FIZIKA PSS-GRAD 29. studenog Copyright 2015 John Wiley & Sons, Inc. All rights reserved.
Termodinamika FIZIKA PSS-GRAD 29. studenog 2017. 15.1 Thermodynamic Systems and Their Surroundings Thermodynamics is the branch of physics that is built upon the fundamental laws that heat and work obey.
More informationThe Bond Number Relationship for the O-H... O Systems
CROATICA CHEMICA ACTA CCACAA 61 (4) 815-819 (1988) CCA-1828 YU ISSN 0011-1643 UDC 541.571.9 Original Scientific Paper The Bond Number Relationship for the O-H... O Systems Slawomir J. Grabowski Institute
More informationTHE PRECISION OF TIME REGISTRATION WITH DANJON ASTROLABE
Serb. Astron. J. 157 (l998), 1 6 UDC 521.938/.95 Original scientific paper THE PRECISION OF TIME REGISTRATION WITH DANJON ASTROLABE G. Perović 1 and Z. Cvetković 2 1 Faculty of Civil Engineering Department
More informationSpectrophotometric investigation of the Fe(III) disulphonated hydroquinone complex
J. Serb. Chem. Soc. 70 (4) 651 659 (2005) UDC 546.723-31+547.565.2:543.4/.5 JSCS 3298 Original scientific paper Spectrophotometric investigation of the Fe(III) disulphonated hydroquinone complex M. V.
More informationNAPREDNI FIZIČKI PRAKTIKUM 1 studij Matematika i fizika; smjer nastavnički MJERENJE MALIH OTPORA
NAPREDNI FIZIČKI PRAKTIKUM 1 studij Matematika i fizika; smjer nastavnički MJERENJE MALIH OTPORA studij Matematika i fizika; smjer nastavnički NFP 1 1 ZADACI 1. Mjerenjem geometrijskih dimenzija i otpora
More informationP a g e 5 1 of R e p o r t P B 4 / 0 9
P a g e 5 1 of R e p o r t P B 4 / 0 9 J A R T a l s o c o n c l u d e d t h a t a l t h o u g h t h e i n t e n t o f N e l s o n s r e h a b i l i t a t i o n p l a n i s t o e n h a n c e c o n n e
More informationCHEM-UA 652: Thermodynamics and Kinetics
CHEM-UA 65: Thermodynamics and Kinetics Notes for Lecture I. THE COMPLEXITY OF MULTI-STEP CHEMICAL REACTIONS It should be clear by now that chemical kinetics is governed by the mathematics of systems of
More informationMATHEMATICAL ANALYSIS OF PERFORMANCE OF A VIBRATORY BOWL FEEDER FOR FEEDING BOTTLE CAPS
http://doi.org/10.24867/jpe-2018-02-055 JPE (2018) Vol.21 (2) Choudhary, M., Narang, R., Khanna, P. Original Scientific Paper MATHEMATICAL ANALYSIS OF PERFORMANCE OF A VIBRATORY BOWL FEEDER FOR FEEDING
More informationPRIPADNOST RJEŠENJA KVADRATNE JEDNAČINE DANOM INTERVALU
MAT KOL Banja Luka) ISSN 0354 6969 p) ISSN 1986 58 o) Vol. XXI )015) 105 115 http://www.imvibl.org/dmbl/dmbl.htm PRIPADNOST RJEŠENJA KVADRATNE JEDNAČINE DANOM INTERVALU Bernadin Ibrahimpašić 1 Senka Ibrahimpašić
More information[ A] 2. [ A] 2 = 2k dt. [ A] o
Chemistry 360 Dr Jean M Standard Problem Set 3 Solutions The reaction 2A P follows second-order kinetics The rate constant for the reaction is k350 0 4 Lmol s Determine the time required for the concentration
More informationANALYSIS OF THE RELIABILITY OF THE "ALTERNATOR- ALTERNATOR BELT" SYSTEM
I. Mavrin, D. Kovacevic, B. Makovic: Analysis of the Reliability of the "Alternator- Alternator Belt" System IVAN MAVRIN, D.Sc. DRAZEN KOVACEVIC, B.Eng. BRANKO MAKOVIC, B.Eng. Fakultet prometnih znanosti,
More information- I, OM OG MED MATEMATIK OG FYSIK
- I, OM OG MED MATEMATIK OG FYSIK Mathematical Modeling of the Hypothalamic-Pituitary-Adrenal Axis Frank Vinther and Morten Andersen March 2010 nr. 469-2010 Roskilde University, Department of Science,
More informationCoulometric generation of H + ions by the anodic oxidation of esters of gallic acid
J. Serb. Chem. Soc. 70 (2) 243 249 (2005) UDC 547.587.2+547 326:543.24 JSCS 3267 Original scientific paper Coulometric generation of H + ions by the anodic oxidation of esters of gallic acid LJILJANA N.
More informationRAČUNALNE METODE PRILAGOĐENE ISTRAŽIVANJU BIOKEMIJSKIH/BIOLOŠKIH SUSTAVA. Kolegij: Strukturna računalna biofizika
RAČUNALNE METODE PRILAGOĐENE ISTRAŽIVANJU BIOKEMIJSKIH/BIOLOŠKIH SUSTAVA Kolegij: Strukturna računalna biofizika Today the computer is just as important a tool for chemists as the test tube. Simulations
More informationUNIFORM PLASMA OSCILLATIONS IN ELLIPSOID OF CONDUCTIVE MATERIAL UDC Yuri Kornyushin
FACTA UNIVERSITATIS Series: Physics, Chemistry and Technology Vol. 3, N o 1, 2004, pp. 35-39 UNIFORM PLASMA OSCILLATIONS IN ELLIPSOID OF CONDUCTIVE MATERIAL UDC 533.92 Yuri Kornyushin Maître Jean Brunschvig
More informationTROPOSFERNI OZON. Prof. dr Ivan Gržetić, Univerzitet u Beogradu - Hemijski fakultet
TROPOSFERNI OZON Prof. dr Ivan Gržetić, Univerzitet u Beogradu - Hemijski fakultet grzetic@chem.bg.ac.rs & www.chem.bg.ac.rs Beleške za predavanja: http://helix.chem.bg.ac.rs/~grzetic/predavanja/ Gržetić
More informationINVESTIGATION OF UPSETTING OF CYLINDER BY CONICAL DIES
INVESTIGATION OF UPSETTING OF CYLINDER BY CONICAL DIES D. Vilotic 1, M. Plancak M 1, A. Bramley 2 and F. Osman 2 1 University of Novi Sad, Yugoslavia; 2 University of Bath, England ABSTRACT Process of
More informationON THE TWO BODY PROBLEM UDC (045)=20. Veljko A. Vujičić
FACTA UNIVERSITATIS Series: Mechanics, Automatic Control and Robotics Vol. 4, N o 7, 005, pp. 03-07 ON THE TWO BODY PROBLEM UDC 53.5(045)0 Veljko A. Vujičić Mathematical Institute, JANN, 00 Belgrade, p.p.
More informationMUSICAL COMPOSITION AND ELEMENTARY EXCITATIONS OF THE ENVIRONMENT
Interdisciplinary Description of Complex Systems (-2), 22-28, 2003 MUSICAL COMPOSITION AND ELEMENTARY EXCITATIONS OF THE ENVIRONMENT Mirna Grgec-Pajić, Josip Stepanić 2 and Damir Pajić 3, * c/o Institute
More informationZANIMLJIV NAČIN IZRAČUNAVANJA NEKIH GRANIČNIH VRIJEDNOSTI FUNKCIJA. Šefket Arslanagić, Sarajevo, BiH
MAT-KOL (Banja Luka) XXIII ()(7), -7 http://wwwimviblorg/dmbl/dmblhtm DOI: 75/МК7A ISSN 5-6969 (o) ISSN 986-588 (o) ZANIMLJIV NAČIN IZRAČUNAVANJA NEKIH GRANIČNIH VRIJEDNOSTI FUNKCIJA Šefket Arslanagić,
More informationDEVELOPMENT OF MATHEMATICAL MODELS TO PREDICT THE EFFECT OF INPUT PARAMETERS ON FEED RATE OF A RECIPROCATORY TUBE FUNNEL FEEDER
http://doi.org/10.24867/jpe-2018-01-067 JPE (2018) Vol.21 (1) Jain, A., Bansal, P., Khanna, P. Preliminary Note DEVELOPMENT OF MATHEMATICAL MODELS TO PREDICT THE EFFECT OF INPUT PARAMETERS ON FEED RATE
More informationRead textbook CHAPTER 1.4, Apps B&D
Lecture 2 Read textbook CHAPTER 1.4, Apps B&D Today: Derive EOMs & Linearization undamental equation of motion for mass-springdamper system (1DO). Linear and nonlinear system. Examples of derivation of
More informationNature-inspired Analog Computing on Silicon
Nature-inspired Analog Computing on Silicon Tetsuya ASAI and Yoshihito AMEMIYA Division of Electronics and Information Engineering Hokkaido University Abstract We propose CMOS analog circuits that emulate
More informationNAPREDNI FIZIČKI PRAKTIKUM II studij Geofizika POLARIZACIJA SVJETLOSTI
NAPREDNI FIZIČKI PRAKTIKUM II studij Geofizika POLARIZACIJA SVJETLOSTI studij Geofizika NFP II 1 ZADACI 1. Izmjerite ovisnost intenziteta linearno polarizirane svjetlosti o kutu jednog analizatora. Na
More informationBiology 3550 Physical Principles in Biology Fall Semester 2017 Mid-Term Exam 6 October 2017
100 points total Please write your name on each page. In your answers you should: Biology 3550 Physical Principles in Biology Fall Semester 2017 Mid-Term Exam 6 October 2017 Show your work or provide an
More information