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mitosis_id
stringlengths
22
22
embryo_id
stringlengths
13
13
parent_node_id
stringlengths
7
12
parent_t
int64
0
97
center_z_um
float64
3.25
102
center_y_um
float64
0.81
102
center_x_um
float64
6.09
101
mean_fluorescence
float64
124
2.34k
max_fluorescence
float64
280
4.31k
std_fluorescence
float64
37.9
609
segmentation_threshold
float64
148
2.61k
nuclear_voxels
int64
788
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nuclear_volume_um3
float64
211
553
semi_axis_a_um
float64
3.72
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semi_axis_b_um
float64
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semi_axis_c_um
float64
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elongation
float64
0.05
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sphericity
float64
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flatness
float64
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major_axis_vector_z
float64
-1
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major_axis_vector_y
float64
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major_axis_vector_x
float64
-0.74
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hertwig_alignment_angle_deg
float64
4.99
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sister_repulsion_speed_um_s
float64
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cleavage_angle_deg
float64
28.3
178
symmetry_ratio
float64
0.06
1
poincare_radius
float64
0.06
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dodecatiad_house
int64
12
12
MIT_44b6_12dfb391_0001
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MIT_44b6_267148e4_0002
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MIT_44b6_2a2eff9f_0003
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MIT_44b6_341df25f_0004
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MIT_44b6_587a1e22_0005
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MIT_44b6_5f15d135_0006
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MIT_44b6_706092f0_0007
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MIT_44b6_74d0c52e_0008
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MIT_44b6_7a302da0_0009
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MIT_44b6_996155de_0010
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MIT_44b6_9be80b04_0011
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MIT_44b6_c8e2a523_0017
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MIT_44b6_d5e7d891_0020
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MIT_44b6_d5e7d891_0021
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MIT_44b6_d754aa59_0022
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MIT_44b6_deabac95_0023
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MIT_44b6_e28840c6_0024
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BioHub Zebrafish Nuclear Morphometry 3D (In Vivo Optical Zarr Extraction)

Este dataset disponibiliza a caracterização morfométrica, volumétrica e espectral em 3D de 151 núcleos mitóticos pré-divisão de embriões de peixe-zebra (Danio rerio), extraídos diretamente dos volumes de microscopia de fluorescência light-sheet em formato Zarr v3 (Kaggle: biohub-cell-tracking-during-development).

A extração foi realizada sob demanda por amostragem cirúrgica de chunks temporais ($1 \times 64 \times 256 \times 256$) via HTTP Range request e descompressão Blosc/Zstandard, evitando a necessidade de download do arquivo completo de 81 GB.


1. Metodologia Óptica e Calibração Física

  • Microscópio: Light-Sheet Fluorescence Microscopy (LSFM).
  • Resoluções Voxel:
    • Eixo Axial: $\Delta Z = 1.625,\mu m$
    • Eixo Lateral: $\Delta Y = \Delta X = 0.40625,\mu m$
    • Volume de Voxel Unitário: $V_{\text{vox}} = 1.625 \times 0.40625^2 \approx 0.2682,\mu m^3$
  • Bounding Box 3D: Subvolume de $11 \times 25 \times 25$ voxels ($17.88 \times 10.16 \times 10.16,\mu m$) centrado no centróide da cromatina.

2. Parâmetros Morfométricos e Tensor de Inércia 3D

Para cada núcleo mitótico:

  1. Segmentação e Volume Nuclear: $$\text{Volume} = N_{\text{voxels}} \times 0.2682 \quad (\mu m^3)$$ onde os voxels são delimitados por limiarização adaptativa de intensidade local.

  2. Tensor de Inércia / Matriz de Covariância Ponderada ($\mathbf{C}$): $$\mathbf{C} = \frac{1}{\sum w_k} \sum_{k} w_k (\mathbf{x}_k - \bar{\mathbf{x}})(\mathbf{x}k - \bar{\mathbf{x}})^T$$ onde os pesos $w_k = I_k - I{\text{thresh}}$ refletem a densidade local de cromatina condensada.

  3. Elipsoide de Inércia Equivalente: Autovalores de $\mathbf{C}$: $\lambda_1 \ge \lambda_2 \ge \lambda_3$.

    • Semi-eixos: $a = 2\sqrt{\lambda_1}$, $b = 2\sqrt{\lambda_2}$, $c = 2\sqrt{\lambda_3}$ (em $\mu m$).
    • Alongamento: $\text{Elongation} = 1 - \frac{b}{a}$
    • Esfericidade: $\Psi = \frac{c}{a}$
    • Planaridade: $\text{Flatness} = 1 - \frac{c}{b}$
  4. Validação da Regra de Hertwig 3D: $$\theta_{\text{Hertwig}} = \arccos \left( \frac{|\vec{e}_1 \cdot \vec{n}|}{|\vec{e}_1| |\vec{n}|} \right)$$ Mede a concordância entre o eixo de maior comprimento nuclear $\vec{e}_1$ e o vetor normal ao plano de clivagem $\vec{n}$.


3. Sumário Estatístico Empírico (151 Núcleos Mitóticos)

Métrica Morfométrica 3D Média Desvio Padrão Mediana
Volume Nuclear 478.72 $\mu m^3$ 69.06 488.91
Semi-eixo Maior ($a$) 7.23 $\mu m$ 1.78 6.97
Semi-eixo Intermediário ($b$) 4.00 $\mu m$ 0.86 3.82
Semi-eixo Menor ($c$) 2.77 $\mu m$ 0.53 2.77
Esfericidade ($\Psi$) 0.404 0.123 0.380
Alongamento 0.420 0.156 0.426
Ângulo de Hertwig com o Plano de Corte 61.83° 22.36 66.50°

4. Ancoragem Epistemológica: Casa 12 da Dodecatíade

Na Dodecatíade Multiescalar, o núcleo mitótico pré-divisão ancora a Casa 12 (Bifurcação de Morse, Singularidade de Thom e Catástrofe de Dobra):

  • A condensação de cromatina e o alongamento elipsoidal marcam a preparação de estado para a transição de fase topológica.
  • O ângulo médio de $61.83^\circ$ reflete o regime de acoplamento viscoelástico dos blastômeros em desenvolvimento inicial.

5. Como Utilizar

import pandas as pd
import sqlite3

# Leitura via Parquet
df = pd.read_parquet("biohub_nuclear_morphometry_3d.parquet")
print(df.head())

# Filtrar núcleos altamente alongados
elongated = df[df["elongation"] > 0.5]
print(f"Núcleos com forte alongamento pré-mitótico: {len(elongated)}")

Curadoria: Fabrício da Silva & OmniMind Sovereign Node (2026).

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