We propose a mathematical model for determining the probability of meteorite origin, impacting the earth. Our method is based on axioms similar to both the complex networks and emergent gravity. As a consequence, we a...We propose a mathematical model for determining the probability of meteorite origin, impacting the earth. Our method is based on axioms similar to both the complex networks and emergent gravity. As a consequence, we are able to derive a link between complex networks and Newton’s gravity law, and as a possible application of our model we discuss several aspects of the Bacubirito meteorite. In particular, we analyze the possibility that the origin of this meteorite may be alpha Centauri system. Moreover, we find that in order for the Bacubirito meteorite to come from alpha Cen and be injected into our Solar System, its velocity must be reduced one order of magnitude of its ejected scape velocity from alpha Cen. There are several ways how this could happened, for example through collision with the Oort cloud objects (located outside the boundary of our Solar System), and/or through collisions within the Solar meteorites belt (located between Mars and Jupiter). We also argue that it may be interesting to study the Bacubirito meteorite from the perspective of the recently discovered Oumuamua object.展开更多
Ten solid complexes of zinc nitrate w ith L-α-leucine(Leu),L-α-valine(Val),L-α-tryptophan(Try)and L-α-threonine(Thr )were prepared in water.The compositions of these complexes are determin ed by chemical analysis ...Ten solid complexes of zinc nitrate w ith L-α-leucine(Leu),L-α-valine(Val),L-α-tryptophan(Try)and L-α-threonine(Thr )were prepared in water.The compositions of these complexes are determin ed by chemical analysis and elemental analysis,which are identified as Zn(Leu)(NO 3 ) 2 ·2H 2 O(A),Zn(Leu) 2 (NO 3 ) 2 ·H 2 O(B),Zn(Val)(NO 3 ) 2 ·2H 2 O(C),Zn(Val) 2 (NO 3 ) 2 ·H 2 O(D),Zn(Val) 3 (NO 3 ) 2 ·H 2 O(E),Zn(Try)(NO 3 ) 2 ·2H 2 O(F),Zn(Try) 2 (NO 3 ) 2 ·H 2 O(G),Zn(Thr )(NO 3 ) 2 ·2H 2 O(H),Zn(Thr ) 2 (NO 3 ) 2 ·H 2 O(I)and Zn(Thr ) 3 (NO 3 )·H 2 O(J).The constant-volume combustion en ergies of the complexes,Δ c U(complex),were determined by a precise rotating bomb calorimeter a t 298.15K.Standard enthalpies of combustion,Δ c H m (complex,s,298.15K),and standard enthalpies of formatio n,Δ f H m (complex,s,298.15K)for these complexes were calculated as(4523.22±2.08),(7208.86±4.28),(3442.21±1.85),(5971.21±3.32),(9007.26±4.24),(5802.35±2.14),(10891.58±3.01),(2147.40±1.28),(4120.83±0.99),(6444.68±3.85)kJ·mol -1 and(615.67±2.27),(1863.16±4.60),(1017.34±2.00),(1742.93±3.61),(2245.70±4.73),(1161.18±2.61),(1829.71±4.20),(1632.82±1.43),(1885.55±1.50),(2770.25±4.21)kJ·mol -1 ,respectively.展开更多
文摘We propose a mathematical model for determining the probability of meteorite origin, impacting the earth. Our method is based on axioms similar to both the complex networks and emergent gravity. As a consequence, we are able to derive a link between complex networks and Newton’s gravity law, and as a possible application of our model we discuss several aspects of the Bacubirito meteorite. In particular, we analyze the possibility that the origin of this meteorite may be alpha Centauri system. Moreover, we find that in order for the Bacubirito meteorite to come from alpha Cen and be injected into our Solar System, its velocity must be reduced one order of magnitude of its ejected scape velocity from alpha Cen. There are several ways how this could happened, for example through collision with the Oort cloud objects (located outside the boundary of our Solar System), and/or through collisions within the Solar meteorites belt (located between Mars and Jupiter). We also argue that it may be interesting to study the Bacubirito meteorite from the perspective of the recently discovered Oumuamua object.
文摘Ten solid complexes of zinc nitrate w ith L-α-leucine(Leu),L-α-valine(Val),L-α-tryptophan(Try)and L-α-threonine(Thr )were prepared in water.The compositions of these complexes are determin ed by chemical analysis and elemental analysis,which are identified as Zn(Leu)(NO 3 ) 2 ·2H 2 O(A),Zn(Leu) 2 (NO 3 ) 2 ·H 2 O(B),Zn(Val)(NO 3 ) 2 ·2H 2 O(C),Zn(Val) 2 (NO 3 ) 2 ·H 2 O(D),Zn(Val) 3 (NO 3 ) 2 ·H 2 O(E),Zn(Try)(NO 3 ) 2 ·2H 2 O(F),Zn(Try) 2 (NO 3 ) 2 ·H 2 O(G),Zn(Thr )(NO 3 ) 2 ·2H 2 O(H),Zn(Thr ) 2 (NO 3 ) 2 ·H 2 O(I)and Zn(Thr ) 3 (NO 3 )·H 2 O(J).The constant-volume combustion en ergies of the complexes,Δ c U(complex),were determined by a precise rotating bomb calorimeter a t 298.15K.Standard enthalpies of combustion,Δ c H m (complex,s,298.15K),and standard enthalpies of formatio n,Δ f H m (complex,s,298.15K)for these complexes were calculated as(4523.22±2.08),(7208.86±4.28),(3442.21±1.85),(5971.21±3.32),(9007.26±4.24),(5802.35±2.14),(10891.58±3.01),(2147.40±1.28),(4120.83±0.99),(6444.68±3.85)kJ·mol -1 and(615.67±2.27),(1863.16±4.60),(1017.34±2.00),(1742.93±3.61),(2245.70±4.73),(1161.18±2.61),(1829.71±4.20),(1632.82±1.43),(1885.55±1.50),(2770.25±4.21)kJ·mol -1 ,respectively.
