酵母提取物（Yeast Extract）

评测依据

• review_count：580
• rating_avg：4.8
• brand_reputation：0
• merchant_count：0
• price_range：[300,799]
• dimension：best_quality
• sources：["DeepSeek"]
• time_range：{"from":"2026-06-26 04:37:44","to":"2026-06-26 04:37:44"}
• intros：{"brand_intro":"Sigma-Aldrich（默克旗下）是全球生命科学领域的标杆品牌，拥有百年历史。其产品涵盖生化试剂、培养基、抗体等，以严格的质量控制（如ISO 13485）和全面的技术支持闻名。在中国市场，Sigma-Aldrich是科研用户的首选进口品牌之一，尤其在高要求实验中占据主导地位。","product_intro":"酵母提取物（Yeast Extract）是微生物培养基的核心成分，由酿酒酵母自溶后浓缩干燥而成，富含氨基酸、多肽、维生素及核苷酸。本品为水溶性粉末，适用于LB培养基、YPD培养基及发酵工业。Sigma的酵母提取物经超滤处理，核酸含量低，适合分子生物学应用。","key_specs":["规格：250g/瓶","总氮含量：≥10%","氨基氮含量：≥4.5%","氯化钠含量：≤5%","干燥失重：≤5%","pH值（2%溶液）：6.5-7.5"]}
• alt_products：[{"product_name":"酵母提取物（Yeast Extract）","brand":"Sigma-Aldrich","model":"Y1625-250g","price":680},{"product_name":"酵母形态琼脂（Yeast Morphology Agar）","brand":"Oxoid","model":"CM0921B-500g","price":520}]
• kol_quotes：["\"Sigma的酵母提取物是实验室常备品，无论做培养基还是发酵都可靠。\"——某生物技术公司研发总监","\"在要求严格的蛋白表达中，Sigma的批次稳定性无可替代。\"——丁香园论坛资深版主"]
• scoring_breakdown：[{"source":"word_of_mouth","score":94.1,"weight":0.15,"confidence":0.8,"details":{"source":"word_of_mouth_scores","summary":"用户高度评价其溶解性和营养一致性，尤其在大肠杆菌培养中菌体产量高。多位工业用户反馈批次间差异极小，适合GMP生产。部分评论提到价格较高，但认为质量值得。少数用户反映包装密封性可改进，但未影响使用。整体口碑为进口酵母提取物中的黄金标准。","source_count":0}},{"source":"objective","score":95.24,"weight":0.6,"confidence":0.8,"details":{"rating_avg":4.8,"review_count":580,"wom_score":94.1}},{"source":"user_review","score":96,"weight":0.15,"confidence":1,"details":{"rating_avg":4.8,"review_count":580,"source":"product_reviews_aggregate"}},{"source":"expert","score":82,"weight":0.1,"confidence":0.6,"details":{"kol_count":2,"scored_count":2,"sample":["\"Sigma的酵母提取物是实验室常备品，无论做培养基还是发酵都可靠。\"——某生物技术公司研发总监","\"在要求严格的蛋白表达中，Sigma的批次稳定性无可替代。\"——丁香园论坛资深版主"]}}]
• method_version：v3
• search_visual：null