用 Nano Banana 生成高质量科研示意图的工作流

用途：
这是一张用于论文 graphical abstract 的科研示意图。

画布：
横版 16:9，白色背景，留出足够边距，适合放在论文或报告中。

主题：
展示一种纳米颗粒递送药物进入肿瘤细胞，并在酸性微环境中释放药物的过程。

版式：
从左到右分成三个区域：
1. 左侧：血管中的纳米颗粒；
2. 中间：纳米颗粒穿过肿瘤组织间隙；
3. 右侧：药物进入肿瘤细胞并诱导细胞凋亡。

视觉元素：
纳米颗粒为蓝色球形结构，药物分子为红色小点，肿瘤细胞为浅紫色。
用箭头表示递送方向。
画面干净，不要复杂背景。

文字：
只保留三个英文标签：
"Nanoparticle"
"Tumor microenvironment"
"Drug release"

风格：
Nature / Cell 风格的简洁科研插画，扁平化矢量风，线条清晰，低饱和度配色。

限制：
不要生成坐标轴。
不要添加无关器官。
不要添加多余英文。
不要生成水印、logo 或签名。

Create a scientific illustration for [用途].

Canvas:
[比例、背景、边距、视角]

Layout:
[从左到右 / 从上到下 / 多面板 A-D / 中心辐射结构]

Main elements:
[元素 1]
[元素 2]
[元素 3]

Scientific process:
[过程 1] -> [过程 2] -> [过程 3]

Labels:
Only include the following labels:
"[标签 1]"
"[标签 2]"
"[标签 3]"

Style:
[期刊风格、矢量风、颜色、线条、简洁程度]

Constraints:
No extra text.
No watermark.
No logo.
No fake charts.
No irrelevant objects.

Create a clean scientific workflow diagram for a biomedical experiment.

Canvas:
Horizontal 16:9 layout, white background, wide margins.

Layout:
Five steps arranged from left to right with arrows between them.

Steps:
1. Sample collection: a small tube with blood sample.
2. Cell isolation: immune cells separated in a centrifuge tube.
3. Nanoparticle incubation: cells mixed with blue nanoparticles.
4. Fluorescence imaging: microscope observing labeled cells.
5. Data analysis: computer screen showing simplified plots.

Labels:
Only include these labels:
"Sample collection"
"Cell isolation"
"Nanoparticle incubation"
"Imaging"
"Data analysis"

Style:
Minimal vector scientific illustration, consistent blue and gray color palette, clean lines, no realistic photo texture.

Constraints:
Do not include extra text.
Do not include people.
Do not include brand logos.
Do not include unreadable tiny labels.

Same diagram, but remove all text labels. Keep only icons, arrows, and layout.

Create a mechanism diagram for a drug-loaded nanoparticle entering a cancer cell.

Canvas:
Square 1:1 layout, white background.

Layout:
Left side shows extracellular space.
Center shows cell membrane.
Right side shows intracellular cytoplasm and nucleus.

Mechanism:
Blue drug-loaded nanoparticles bind to receptors on the cell membrane.
The nanoparticles enter the cell through endocytosis.
Inside acidic endosomes, nanoparticles release red drug molecules.
Drug molecules move toward the nucleus and induce DNA damage.

Visual elements:
Blue spherical nanoparticles.
Red small drug molecules.
Purple cancer cell.
Endosome vesicles.
Nucleus with simplified DNA strands.

Labels:
Only include:
"Receptor binding"
"Endocytosis"
"Drug release"
"DNA damage"

Style:
High-quality biomedical vector illustration, clean outlines, soft gradients, publication-ready, no cartoon exaggeration.

Constraints:
No extra pathways.
No immune cells.
No blood vessels.
No random molecular structures.
No fake microscopy images.

Keep the overall layout unchanged.
Remove the mitochondria-like objects.
Make the red drug molecules move from the endosome toward the nucleus.
Keep only four labels:
"Receptor binding"
"Endocytosis"
"Drug release"
"DNA damage"

Create a publication-quality graphical abstract.

Scientific story:
A hydrogel patch releases anti-inflammatory nanoparticles to accelerate wound healing.

Canvas:
Horizontal 16:9 layout, white background.

Layout:
Three connected zones from left to right:
1. Left: chronic wound with inflammation.
2. Middle: hydrogel patch applied on the wound surface.
3. Right: healed skin with reduced inflammation and new tissue regeneration.

Visual elements:
Hydrogel patch: transparent light blue gel.
Nanoparticles: small green dots released from the gel.
Inflammation: red glowing area and immune cells on the left.
Healing: organized collagen fibers and regenerated epidermis on the right.

Labels:
Only include:
"Inflammation"
"Hydrogel patch"
"Nanoparticle release"
"Tissue regeneration"

Style:
Elegant biomedical illustration, vector-like, soft colors, clean arrows, suitable for a journal graphical abstract.

Constraints:
No surgery tools.
No doctors or patients.
No unnecessary organs.
No extra text.
No logo.

import matplotlib.pyplot as plt
import numpy as np

days = np.array([0, 1, 3, 5, 7])
control = np.array([100, 95, 88, 80, 72])
treated = np.array([100, 90, 70, 48, 30])

plt.figure(figsize=(4, 3), dpi=300)
plt.plot(days, control, marker="o", linewidth=2, label="Control")
plt.plot(days, treated, marker="o", linewidth=2, label="Treated")

plt.xlabel("Time (days)")
plt.ylabel("Cell viability (%)")
plt.ylim(0, 110)
plt.legend(frameon=False)
plt.tight_layout()

plt.savefig("cell_viability.pdf")
plt.savefig("cell_viability.png", dpi=600)

import os
from pathlib import Path
from google import genai
from google.genai import types

client = genai.Client(api_key=os.environ["GEMINI_API_KEY"])

prompt = """
Create a clean scientific workflow diagram.

Canvas:
Horizontal 16:9, white background.

Layout:
Four steps from left to right:
1. Material synthesis
2. Surface modification
3. Cell incubation
4. Fluorescence imaging

Labels:
Only include:
"Material synthesis"
"Surface modification"
"Cell incubation"
"Imaging"

Style:
Minimal vector scientific illustration, blue-gray color palette, clean arrows.

Constraints:
No extra text.
No watermark.
No logo.
"""

response = client.models.generate_content(
    model="gemini-2.5-flash-image-preview",
    contents=prompt,
    config=types.GenerateContentConfig(
        response_modalities=["TEXT", "IMAGE"]
    ),
)

output_dir = Path("outputs")
output_dir.mkdir(exist_ok=True)

for i, part in enumerate(response.candidates[0].content.parts):
    if getattr(part, "inline_data", None):
        image_bytes = part.inline_data.data
        (output_dir / f"scientific_figure_{i}.png").write_bytes(image_bytes)

Keep the same composition and style.
Change all nanoparticles from green to blue.
Remove the extra cell in the upper right corner.
Do not change the labels.
Do not add new elements.

Convert this rough sketch into a clean publication-quality scientific illustration.
Preserve the layout and arrow directions.
Use a minimal vector style with white background.
Keep the labels editable-looking and simple.
Do not add extra biological structures.

Create a publication-quality scientific illustration.

Purpose:
[论文插图 / graphical abstract / 实验流程图 / 机制图]

Canvas:
[横版 16:9 / 方形 1:1 / 竖版 4:5]，white background，wide margins.

Layout:
[左到右流程 / 上下结构 / 中心主体 + 周围模块 / 多面板 A-D]

Main scientific message:
[一句话写清楚这张图要表达什么]

Required elements:
- [元素 1]
- [元素 2]
- [元素 3]

Process or relationship:
[元素之间的作用关系、箭头方向、变化过程]

Labels:
Only include:
"[标签 1]"
"[标签 2]"
"[标签 3]"

Style:
Clean vector scientific illustration, publication-ready, consistent color palette, clear lines.

Constraints:
No extra text.
No watermark.
No logo.
No fake data plots.
No irrelevant biological structures.
No unreadable tiny labels.