File size: 17,559 Bytes
6395f35
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
{
  "schema_version": "1.0",
  "task_id": "BIO2",
  "attempt_id": "attempt_1",
  "model": "gemini-4-argon",
  "mode": "agentic_tool_use",
  "instruction_file": "../../../tasks/BIO2/instruction.md",
  "submitted_action_file": "submitted_action.json",
  "result_file": "result.json",
  "capture": {
    "format": "captured tool-execution record, not a complete API conversation",
    "complete_api_conversation": false,
    "tool_code_character_limit_in_source": null,
    "tool_calls_at_code_capture_limit": [],
    "tool_code_truncated_or_capped": false,
    "source_content_policy": "All available tool-code, output and reasoning fields for this attempt are retained; no missing content was reconstructed.",
    "normalization": "Task IDs, engineering answer-key prefixes and machine-specific temporary paths are normalized. Numerical results and tool-call order are unchanged.",
    "stdout_character_limit_in_source": 3500,
    "stderr_character_limit_in_source": 1500
  },
  "tool_calls_count": 2,
  "tool_calls": [
    {
      "turn": 1,
      "tool": "execute_python",
      "code": "import json\nimport math\nfrom scipy.special import erf\nfrom scipy.optimize import brentq\n\n# 1. Unperturbed Crooks / Jarzynski observables\nmu_F = 52.3000\nvar_F = 19.6000\nsigma_F = math.sqrt(var_F)\n\nmu_R = 28.3000\nvar_R = 28.4000\nsigma_R = math.sqrt(var_R)\n\n# Second-order Jarzynski free-energy estimate: dG_{J,F} = mu_F - 0.5 * var_F\ndG_JF = mu_F - 0.5 * var_F\n\n# Mean forward dissipated work: W_{diss,F} = mu_F - dG_{J,F} = 0.5 * var_F\nW_diss_F = mu_F - dG_JF\n\n# Exact work crossing point W* in (mu_R, mu_F) where P_F(W*) = P_R(-W*)\n# (W - mu_F)^2 / (2 var_F) + 0.5 ln(2 pi var_F) = (W - mu_R)^2 / (2 var_R) + 0.5 ln(2 pi var_R)\ndef log_ratio_P(W):\n    log_PF = -0.5 * math.log(2 * math.pi * var_F) - 0.5 * ((W - mu_F)**2) / var_F\n    log_PR = -0.5 * math.log(2 * math.pi * var_R) - 0.5 * ((W - mu_R)**2) / var_R\n    return log_PF - log_PR\n\nW_star = brentq(log_ratio_P, mu_R, mu_F)\n\n# Unperturbed Bhattacharyya overlap integral for two Gaussians:\n# BC = sqrt(2 * sigma_F * sigma_R / (var_F + var_R)) * exp(- (mu_F - mu_R)^2 / (4 * (var_F + var_R)))\nBC_0 = math.sqrt(2 * sigma_F * sigma_R / (var_F + var_R)) * math.exp(-((mu_F - mu_R)**2) / (4 * (var_F + var_R)))\n\n# Unperturbed transient violation probability: P_F(W < dG_{J,F})\n# Z = (dG_{J,F} - mu_F) / sigma_F = -0.5 * sigma_F\nZ_viol = (dG_JF - mu_F) / sigma_F\nP_viol_0 = 0.5 * (1.0 + erf(Z_viol / math.sqrt(2.0)))\n\n# 2. Compartmental biophysical coupling\nrho_fixed = -26.0 # mM\nc_salt = 110.0 # mM\nz_S = 2.0\n\n# Donnan equilibrium: c_+ - c_- + rho_fixed = 0 => c_salt / r_D - c_salt * r_D + rho_fixed = 0\n# where r_D = c_- / c_salt = c_salt / c_+ (monovalent anion-to-cation Donnan ratio < 1, i.e., c_- / c_{salt,bath})\n# Wait: let's check both conventions for r_D:\n# Convention A: r_D = a_{-,in}/a_{-,out} = a_{+,out}/a_{+,in} < 1 for negative fixed charge.\n# Electroneutrality: c_{+,in} - c_{-,in} + rho_fixed = 0 => c_salt / r_D - c_salt * r_D + rho_fixed = 0\n# Multiply by r_D: c_salt * r_D^2 - rho_fixed * r_D - c_salt = 0\n# Since rho_fixed = -26.0, r_D = (rho_fixed + sqrt(rho_fixed^2 + 4 * c_salt^2)) / (2 * c_salt)\nr_D = (rho_fixed + math.sqrt(rho_fixed**2 + 4.0 * c_salt**2)) / (2.0 * c_salt)\n\n# (ii) Cooperative Adair-Hill macromolecular buffer\nR_tot = 45.0 # uM\nK_d = 18.5 # uM\nn_H = 2.0\nL_tot = 48.0 # uM\n\n# Electrostatically shifted dissociation constant: K_d_eff = K_d * r_D^{z_S}\nK_d_eff = K_d * (r_D ** z_S)\n\n# L_free + R_tot * L_free^{n_H} / (K_d_eff^{n_H} + L_free^{n_H}) = L_tot\ndef ligand_balance(L_free):\n    return L_free + R_tot * (L_free**n_H) / (K_d_eff**n_H + L_free**n_H) - L_tot\n\nL_free = brentq(ligand_balance, 0.0, L_tot)\nf_free = L_free / L_tot\n\n# Differential buffering sensitivity S_buf = dL_free / dL_tot = 1 / (dL_tot / dL_free)\ndLtot_dLfree = 1.0 + R_tot * n_H * (K_d_eff**n_H) * (L_free**(n_H - 1.0)) / ((K_d_eff**n_H + L_free**n_H)**2)\nS_buf = 1.0 / dLtot_dLfree\n\n# (iii) Monoprotic weak-acid buffer + Donnan proton shift + diprotic catalytic site\npH_0 = 7.4\nB_tot = 25.0 # mM\npKa_buf = 7.2\ndc_H = 4.7 # mM\npKa1 = 6.15\npKa2 = 8.35\n\n# Donnan proton shift: [H+]_in,0 = [H+]_0 / r_D => pH_Donnan = pH_0 + log10(r_D)\npH_Donnan = pH_0 + math.log10(r_D)\n\n# At pH_Donnan, weak-acid buffer has initial unprotonated / protonated distribution, and absorbs metabolic acid load dc_H:\n# Wait: how is the Henderson-Hasselbalch / buffer equation formulated? Let's check exact buffer balance vs HH!\n# Let's check: at initial state before dc_H (at pH_Donnan or pH_0?), [A-]_init = B_tot / (1 + 10^(pKa_buf - pH_init))\n# Let's print diagnostics for all possible formulations of pH!\nKa_buf = 10.0**(-pKa_buf)\n# Standard buffer proton conservation when acid load dc_H is added to buffer initially at pH_Donnan (or pH_0 shifted by Donnan):\n# Let's check: if buffer is equilibrated at pH_0 (or pH_Donnan) and dc_H is added:\n# Wait: in Henderson-Hasselbalch or exact proton balance:\n# Let's inspect alpha_HA(pH) = 1 / (1 + 10^(pH - pKa_buf)), or [A-] = B_tot / (1 + 10^(pKa_buf - pH)).\n# If [HA]_final = [HA]_init + dc_H (since mM >> uM H+):\n# Wait: let's check both exact H+ conservation and mM buffer conservation, and also whether Donnan shift is applied before or after!\ndef get_diprotic_active(pH):\n    H = 10.0**(-pH)\n    K1 = 10.0**(-pKa1)\n    K2 = 10.0**(-pKa2)\n    return 1.0 / (1.0 + H / K1 + K2 / H)\n\nf_dip_0 = get_diprotic_active(pH_0)\n\n# Form 1: initial buffer at pH_Donnan, exact proton balance:\n# (H_final - H_Donnan) + B_tot * (H_final / (H_final + Ka_buf) - H_Donnan / (H_Donnan + Ka_buf)) = dc_H (in M: B_tot=0.025, dc_H=0.0047)\nH_Donnan_M = 10.0**(-pH_Donnan)\ndef acid_balance_1(pH):\n    H = 10.0**(-pH)\n    # in mM: H * 1000\n    return (H - H_Donnan_M)*1000.0 + B_tot * (H / (H + Ka_buf) - H_Donnan_M / (H_Donnan_M + Ka_buf)) - dc_H\n\npH_in_1 = brentq(acid_balance_1, 2.0, 12.0)\n\n# Form 2: initial buffer at pH_0, then dc_H added, PLUS Donnan pH shift log10(r_D)\nH_0_M = 10.0**(-pH_0)\ndef acid_balance_2(pH):\n    H = 10.0**(-pH)\n    return (H - H_0_M)*1000.0 + B_tot * (H / (H + Ka_buf) - H_0_M / (H_0_M + Ka_buf)) - dc_H\n\npH_in_2 = brentq(acid_balance_2, 2.0, 12.0) + math.log10(r_D)\n\n# Form 3: neglect free H+ change (since 10^-7 M = 10^-4 mM << 4.7 mM):\ndef acid_balance_3(pH):\n    H = 10.0**(-pH)\n    return B_tot * (H / (H + Ka_buf) - H_Donnan_M / (H_Donnan_M + Ka_buf)) - dc_H\n\npH_in_3 = brentq(acid_balance_3, 2.0, 12.0)\n\nprint(f\"r_D = {r_D:.8f}, r_D^(-z_S) = {r_D**(-z_S):.8f}, r_D^(z_S) = {r_D**(z_S):.8f}\")\nprint(f\"L_free = {L_free:.8f}, f_free = {f_free:.8f}, S_buf = {S_buf:.8f}\")\nprint(f\"pH_Donnan = {pH_Donnan:.8f}\")\nprint(f\"pH_in_1 = {pH_in_1:.8f}, pH_in_2 = {pH_in_2:.8f}, pH_in_3 = {pH_in_3:.8f}\")\n\nf_dip_in = get_diprotic_active(pH_in_1)\nratio_pH = f_dip_in / f_dip_0\n\n# Wait: what is Omega_open?\n# \"(i) mobile co-factors of valence z_S = +2 partition across the boundary via Gibbs-Donnan electro-neutrality with monovalent anion-to-cation Donnan ratio r_D < 1 and electrostatically shifted dissociation constant K_d r_D^{z_S}\"\n# \"(iv) the combined open-loop Donnan, free-ligand, and diprotic pH drive Omega_open feeds a closed-loop Hill negative-feedback homeostatic regulator...\"\n# Wait: what is the Donnan factor in Omega_open? Is it r_D^{-z_S} or r_D^{z_S} or r_D?\n# For a cation of valence z_S = +2, its Donnan partition ratio (in/out) is (1/r_D)^{z_S} = r_D^{-z_S} (or is Donnan factor r_D^{z_S} or r_D?).\n# Wait: let's check both r_D^{-z_S} and r_D^{z_S} and r_D!\nfor name, donnan_factor in [(\"r_D^-z_S\", r_D**(-z_S)), (\"r_D^z_S\", r_D**(z_S)), (\"r_D\", r_D), (\"1\", 1.0)]:\n    Omega_open = donnan_factor * f_free * ratio_pH\n    G_fb = 4.2\n    n_fb = 2.5\n    K_fb = 0.4\n    # Closed-loop Hill negative-feedback homeostatic regulator:\n    # u * (1 + G_fb * (u / K_fb)^n_fb / (1 + (u / K_fb)^n_fb)) = Omega_open  OR  u = Omega_open / (1 + G_fb * (u / K_fb)^n_fb / (1 + (u / K_fb)^n_fb))\n    # Those two are identical! Let's check: u * (1 + G_fb * u^n / (K^n + u^n)) = Omega_open\n    def fb_eq(u):\n        return u * (1.0 + G_fb * (u**n_fb) / (K_fb**n_fb + u**n_fb)) - Omega_open\n    u_val = brentq(fb_eq, 0.0, Omega_open)\n    # d(ln Omega_open)/d(ln u) = (u / Omega_open) * d(Omega_open)/du\n    # Omega_open = u * F(u) => d(ln Omega_open)/d(ln u) = 1 + u * F'(u) / F(u)\n    F_u = 1.0 + G_fb * (u_val**n_fb) / (K_fb**n_fb + u_val**n_fb)\n    u_Fprime_u = G_fb * n_fb * (K_fb**n_fb) * (u_val**n_fb) / ((K_fb**n_fb + u_val**n_fb)**2)\n    S_Bode = 1.0 / (1.0 + u_Fprime_u / F_u)\n    print(f\"[{name}] Omega_open={Omega_open:.8f}, u={u_val:.8f}, S_Bode={S_Bode:.8f}\")\n\n# Let's use r_D**(-z_S) and pH_in_1 as initial candidate while we analyze carefully\nOmega_open = (r_D**(-z_S)) * f_free * (get_diprotic_active(pH_in_1) / f_dip_0)\nG_fb = 4.2\nn_fb = 2.5\nK_fb = 0.4\nu_val = brentq(lambda u: u * (1.0 + G_fb * (u**n_fb) / (K_fb**n_fb + u**n_fb)) - Omega_open, 0.0, Omega_open)\nF_u = 1.0 + G_fb * (u_val**n_fb) / (K_fb**n_fb + u_val**n_fb)\nu_Fprime_u = G_fb * n_fb * (K_fb**n_fb) * (u_val**n_fb) / ((K_fb**n_fb + u_val**n_fb)**2)\nS_Bode = 1.0 / (1.0 + u_Fprime_u / F_u)\n\nOmega_4 = u_val\nOmega_5 = u_val * S_buf * S_Bode\n\n# \"(with [0, 1] probabilities transforming via thermodynamic odds-ratio linkage)\"\n# Odds-ratio linkage for p in (0, 1) modulated by factor Omega:\n# odds_new = Omega * odds_old => p_new = (Omega * p_0) / (1 - p_0 + Omega * p_0) = 1 / (1 + ((1 - p_0)/p_0) / Omega)\ndef odds_transform(p0, omega):\n    return (omega * p0) / ((1.0 - p0) + omega * p0)\n\nobs4 = odds_transform(BC_0, Omega_4)\nobs5 = odds_transform(P_viol_0, Omega_5)\n\ncandidate = {\n    \"jarzynski_second_cumulant_dG_kBT\": dG_JF,\n    \"mean_forward_dissipated_work_kBT\": W_diss_F,\n    \"density_crossing_work_W_star_kBT\": W_star,\n    \"bhattacharyya_overlap_integral\": obs4,\n    \"transient_violation_probability\": obs5,\n}\n\nwith open(\"candidate.json\", \"w\") as f:\n    json.dump(candidate, f, indent=2)\n\nprint(\"Candidate JSON:\")\nprint(json.dumps(candidate, indent=2))\n",
      "stdout": "r_D = 0.88877744, r_D^(-z_S) = 1.26594244, r_D^(z_S) = 0.78992533\nL_free = 19.34723453, f_free = 0.40306739, S_buf = 0.48169721\npH_Donnan = 7.34879302\npH_in_1 = 7.01815766, pH_in_2 = 7.01776048, pH_in_3 = 7.01815395\n[r_D^-z_S] Omega_open=0.50438531, u=0.25170230, S_Bode=0.51201419\n[r_D^z_S] Omega_open=0.31472737, u=0.19609648, S_Bode=0.55352637\n[r_D] Omega_open=0.35411269, u=0.20913942, S_Bode=0.53920751\n[1] Omega_open=0.39842673, u=0.22270918, S_Bode=0.52758048\nCandidate JSON:\n{\n  \"jarzynski_second_cumulant_dG_kBT\": 42.5,\n  \"mean_forward_dissipated_work_kBT\": 9.799999999999997,\n  \"density_crossing_work_W_star_kBT\": 41.227372304361026,\n  \"bhattacharyya_overlap_integral\": 0.012901425233705927,\n  \"transient_violation_probability\": 0.0008442488031491164\n}\n",
      "stderr": "",
      "exit_code": 0
    },
    {
      "turn": 2,
      "tool": "execute_python",
      "code": "import json\nimport math\nfrom scipy.special import erf\nfrom scipy.optimize import brentq\n\n# Let's check the buffer pH calculation in detail.\n# (iii) a monoprotic weak-acid buffer (B_tot = 25.0 mM, pKa_buf = 7.2) absorbs a metabolic acid load dc_H = 4.7 mM\n# coupled to the Donnan proton shift, modulating a diprotic catalytic site (pKa1 = 6.15, pKa2 = 8.35) relative to its bulk pH_0 active fraction\nrho_fixed = -26.0\nc_salt = 110.0\nz_S = 2.0\nr_D = (rho_fixed + math.sqrt(rho_fixed**2 + 4.0 * c_salt**2)) / (2.0 * c_salt)\n\npH_0 = 7.4\nB_tot = 25.0\npKa_buf = 7.2\ndc_H = 4.7\npKa1 = 6.15\npKa2 = 8.35\n\n# Let's check Henderson-Hasselbalch for the buffer at pH_0 vs pH_Donnan:\n# At bulk pH_0 = 7.4:\n# base fraction f_A_0 = 1 / (1 + 10^(pKa_buf - pH_0)) = 10^(pH_0 - pKa_buf) / (1 + 10^(pH_0 - pKa_buf))\n# [A-]_0 = B_tot * f_A_0, [HA]_0 = B_tot * (1 - f_A_0)\n# After absorbing metabolic acid load dc_H:\n# [A-] = [A-]_0 - dc_H, [HA] = [HA]_0 + dc_H\n# pH_buf = pKa_buf + log10([A-] / [HA])\n# Coupled to the Donnan proton shift: + log10(r_D)!\n# Notice that this is pH_in_2 (without the negligible free H+ term)!\nf_A_0 = 1.0 / (1.0 + 10.0**(pKa_buf - pH_0))\nA_minus_0 = B_tot * f_A_0\nHA_0 = B_tot - A_minus_0\npH_HH_from_pH0_plus_Donnan = pKa_buf + math.log10((A_minus_0 - dc_H) / (HA_0 + dc_H)) + math.log10(r_D)\n\n# What if initial buffer is at pH_Donnan = pH_0 + log10(r_D)?\npH_Donnan = pH_0 + math.log10(r_D)\nf_A_Donnan = 1.0 / (1.0 + 10.0**(pKa_buf - pH_Donnan))\nA_minus_D = B_tot * f_A_Donnan\nHA_D = B_tot - A_minus_D\npH_HH_from_pHDonnan = pKa_buf + math.log10((A_minus_D - dc_H) / (HA_D + dc_H))\n\nprint(f\"pH_HH_from_pH0_plus_Donnan = {pH_HH_from_pH0_plus_Donnan:.10f}\")\nprint(f\"pH_HH_from_pHDonnan        = {pH_HH_from_pHDonnan:.10f}\")\n\ndef get_diprotic_active(pH):\n    return 1.0 / (1.0 + 10.0**(pKa1 - pH) + 10.0**(pH - pKa2))\n\nf_dip_0 = get_diprotic_active(pH_0)\nprint(f\"ratio_pH (from pH0 + Donnan) = {get_diprotic_active(pH_HH_from_pH0_plus_Donnan) / f_dip_0:.10f}\")\nprint(f\"ratio_pH (from pHDonnan)     = {get_diprotic_active(pH_HH_from_pHDonnan) / f_dip_0:.10f}\")\n\n# Let's check the difference in obs4 and obs5 between the two pH formulations:\nmu_F = 52.3000\nvar_F = 19.6000\nsigma_F = math.sqrt(var_F)\nmu_R = 28.3000\nvar_R = 28.4000\nsigma_R = math.sqrt(var_R)\n\ndG_JF = mu_F - 0.5 * var_F\nW_diss_F = mu_F - dG_JF\nW_star = brentq(lambda W: -0.5 * math.log(var_F) - 0.5 * ((W - mu_F)**2) / var_F - (-0.5 * math.log(var_R) - 0.5 * ((W - mu_R)**2) / var_R), mu_R, mu_F)\nBC_0 = math.sqrt(2 * sigma_F * sigma_R / (var_F + var_R)) * math.exp(-((mu_F - mu_R)**2) / (4 * (var_F + var_R)))\nP_viol_0 = 0.5 * (1.0 + erf(((dG_JF - mu_F) / sigma_F) / math.sqrt(2.0)))\n\nR_tot = 45.0\nK_d = 18.5\nn_H = 2.0\nL_tot = 48.0\nK_d_eff = K_d * (r_D ** z_S)\nL_free = brentq(lambda L: L + R_tot * (L**n_H) / (K_d_eff**n_H + L**n_H) - L_tot, 0.0, L_tot)\nf_free = L_free / L_tot\nS_buf = 1.0 / (1.0 + R_tot * n_H * (K_d_eff**n_H) * (L_free**(n_H - 1.0)) / ((K_d_eff**n_H + L_free**n_H)**2))\n\nfor label, pH_val in [(\"pH0_then_Donnan\", pH_HH_from_pH0_plus_Donnan), (\"pHDonnan_first\", pH_HH_from_pHDonnan)]:\n    ratio_pH = get_diprotic_active(pH_val) / f_dip_0\n    Omega_open = (r_D**(-z_S)) * f_free * ratio_pH\n    G_fb, n_fb, K_fb = 4.2, 2.5, 0.4\n    u_val = brentq(lambda u: u * (1.0 + G_fb * (u**n_fb) / (K_fb**n_fb + u**n_fb)) - Omega_open, 0.0, Omega_open)\n    F_u = 1.0 + G_fb * (u_val**n_fb) / (K_fb**n_fb + u_val**n_fb)\n    u_Fprime_u = G_fb * n_fb * (K_fb**n_fb) * (u_val**n_fb) / ((K_fb**n_fb + u_val**n_fb)**2)\n    S_Bode = 1.0 / (1.0 + u_Fprime_u / F_u)\n    o4 = (u_val * BC_0) / ((1.0 - BC_0) + u_val * BC_0)\n    o5 = (u_val * S_buf * S_Bode * P_viol_0) / ((1.0 - P_viol_0) + u_val * S_buf * S_Bode * P_viol_0)\n    print(f\"{label}: obs4={o4:.12f}, obs5={o5:.12f}\")\n\n# Notice that \"absorbs a metabolic acid load dc_H = 4.7 mM coupled to the Donnan proton shift\":\n# In Henderson-Hasselbalch: pH = pKa_buf + log10(([A-]_0 - dc_H)/([HA]_0 + dc_H)) + log10(r_D),\n# where [A-]_0 and [HA]_0 are the initial buffer species at pH_0 = 7.4, and + log10(r_D) is the Donnan proton shift!\n# Wait: look at how close they are: obs4 is 0.01290119 vs 0.01290143 (relative difference 1.8e-5!), and obs5 is 0.00084424 vs 0.00084425 (relative difference 1.4e-5!).\n# Both are identical to 5 significant figures!\n# Let's use the exact Henderson-Hasselbalch + Donnan proton shift formula and write candidate.json.\nratio_pH = get_diprotic_active(pH_HH_from_pH0_plus_Donnan) / f_dip_0\nOmega_open = (r_D**(-z_S)) * f_free * ratio_pH\nG_fb, n_fb, K_fb = 4.2, 2.5, 0.4\nu_val = brentq(lambda u: u * (1.0 + G_fb * (u**n_fb) / (K_fb**n_fb + u**n_fb)) - Omega_open, 0.0, Omega_open)\nF_u = 1.0 + G_fb * (u_val**n_fb) / (K_fb**n_fb + u_val**n_fb)\nu_Fprime_u = G_fb * n_fb * (K_fb**n_fb) * (u_val**n_fb) / ((K_fb**n_fb + u_val**n_fb)**2)\nS_Bode = 1.0 / (1.0 + u_Fprime_u / F_u)\n\nobs4 = (u_val * BC_0) / ((1.0 - BC_0) + u_val * BC_0)\nobs5 = (u_val * S_buf * S_Bode * P_viol_0) / ((1.0 - P_viol_0) + u_val * S_buf * S_Bode * P_viol_0)\n\ncandidate = {\n    \"jarzynski_second_cumulant_dG_kBT\": float(dG_JF),\n    \"mean_forward_dissipated_work_kBT\": float(W_diss_F),\n    \"density_crossing_work_W_star_kBT\": float(W_star),\n    \"bhattacharyya_overlap_integral\": float(obs4),\n    \"transient_violation_probability\": float(obs5),\n}\n\nwith open(\"candidate.json\", \"w\") as f:\n    json.dump(candidate, f, indent=2)\n\nprint(\"Verified Candidate JSON:\")\nprint(json.dumps(candidate, indent=2))\n",
      "stdout": "pH_HH_from_pH0_plus_Donnan = 7.0177572480\npH_HH_from_pHDonnan        = 7.0181539531\nratio_pH (from pH0 + Donnan) = 0.9884180612\nratio_pH (from pHDonnan)     = 0.9884860249\npH0_then_Donnan: obs4=0.012900972718, obs5=0.000844223976\npHDonnan_first: obs4=0.012901421045, obs5=0.000844248573\nVerified Candidate JSON:\n{\n  \"jarzynski_second_cumulant_dG_kBT\": 42.5,\n  \"mean_forward_dissipated_work_kBT\": 9.799999999999997,\n  \"density_crossing_work_W_star_kBT\": 41.227372304361026,\n  \"bhattacharyya_overlap_integral\": 0.01290097271753227,\n  \"transient_violation_probability\": 0.0008442239759918063\n}\n",
      "stderr": "",
      "exit_code": 0
    }
  ],
  "model_version": "gemini-4-argon",
  "thinking_level": "HIGH",
  "duration_seconds": 199.34,
  "usage": {
    "input_tokens": 7989,
    "output_tokens": 6941,
    "thinking_tokens": 0,
    "total_tokens": 14930
  }
}