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2-8°
| 231810 | 100 g | EA | Difco | Folic Acid Assay Medium | 叶酸测试培养基 |
| 282210 | 100 g | EA | Difco | Folic Acid Casei Medium | 叶酸酪蛋白培养基 |
| 212169 | 100 g | EA | Difco | Folic AOAC Medium | 叶酸AOAC培养基 |
| 211767 | 500 g | EA | Difco | Fraser Broth Base | 瓶装Fraser肉汤基础 |
| 211766 | 2 kg | EA | Difco | Fraser Broth Base | Fraser肉汤基础 |
| 211742 | 6 | SP | Difco | Fraser Broth Supplement, 10 mL | Fraser肉汤添加剂 |
| 218091 | 500 g | EA | Difco | Giolitti - Cantoni Broth Base | GIOLITTI-CANTONI肉汤B |
| 228210 | 100 g | EA | Difco | Glycerol | 甘油 |
| 228220 | 500 g | EA | Difco | Glycerol | 甘油 |
| 211279 | 500 g | EA | BBL | GN Broth | GN肉汤 |
| 248610 | 500 g | EA | Difco | GN Broth, Hajna | GN肉汤HAJNA |
| 268510 | 500 g | EA | Difco | HC Agar Base | HC琼脂基础 |
| 244400 | 500 g | EA | Difco | Heart Infusion Agar | 心浸液琼脂 |
| 244100 | 2 kg | EA | Difco | Heart Infusion Agar | 心浸液琼脂 |
| 211839 | 10 kg | EA | Difco | Heart Infusion Agar | 心浸液琼脂 |
| 238400 | 500 g | EA | Bacto | Heart Infusion Broth | 心浸液肉汤 |
| 238100 | 2 kg | EA | Bacto | Heart Infusion Broth | 心浸液肉汤 |
| 285340 | 500 g | EA | Difco | Hektoen Enteric Agar | HE琼脂 |
| 285310 | 2 kg | EA | Difco | Hektoen Enteric Agar | HEKTOEN肠杆菌琼脂 |
| 285320 | 10 kg | EA | Difco | Hektoen Enteric Agar | HEKTOEN肠杆菌琼脂 |
| 211874 | 10 | SP | BBL | Hemoglobin Solution 2%, 100 mL | 2%血红蛋白溶液 100ml |
| 212392 | 500 g | EA | BBL | Hemoglobin, Bovine, Freeze-Dried | 血红蛋白 |
| 211037 | 500 g | EA | BBL | Infusion Agar (Blood Agar Base) | 血琼脂基础 |
| 211038 | 5 lb. | EA | BBL | Infusion Agar (Blood Agar Base) | 血琼脂基础 |
| 292846 | 500 g | EA | BBL | Inhibitory Mold Agar | 霉菌抑制琼脂 |
| 212254 | 5 lb. | EA | BBL | Inhibitory Mold Agar | 霉菌抑制琼脂 |
| 216410 | 100 g | EA | Difco | Inositol | 肌醇 |
| 212222 | 100 g | EA | Difco | Inositol Assay Medium | 肌醇分析培养基 |
| 211876 | 5 | SP | BBL | IsoVitaleX™ Enrichment, 10 mL | IsoVitaleTM增菌液 |
| 211875 | 5 | SP | BBL | IsoVitaleX™ Enrichment, 2 mL | IsoVitaleTM增菌液 |
| 276910 | 500 g | EA | Difco | ISP Medium 1 | ISP培养基1号 |
| 277010 | 500 g | EA | Difco | ISP Medium 2 | ISP培养基2号 |
| 277210 | 500 g | EA | Difco | ISP Medium 4 | ISP培养基4号 |
| 249610 | 500 g | EA | Difco | KF Streptococcus Agar | KF链球菌琼脂 |
| 212226 | 500 g | EA | Difco | KF Streptococcus Broth | KF链球菌肉汤 |
| 244910 | 500 g | EA | Difco | King Medium A (Pseudomonas agar P) | 假单孢菌琼脂P |
| 211317 | 500 g | EA | BBL | Kligler Iron Agar | 克氏双糖铁琼脂 |
| 215100 | 500 g | EA | Difco | Koser Citrate Medium | KOSER柠檬酸盐培养基 |
| 290010 | 100 g | EA | Difco | Lactobacilli Agar | 乳酸杆菌琼脂AOAC |
| 290110 | 100 g | EA | Difco | Lactobacilli Broth | 乳酸杆菌肉汤AOAC |
| 288210 | 500 g | EA | Difco | Lactobacilli MRS Agar | 乳酸菌MRS琼脂 |
| 288130 | 500 g | EA | Difco | Lactobacilli MRS Broth | 乳酸菌MRS肉汤 |
| 288110 | 2 kg | EA | Difco | Lactobacilli MRS Broth | 乳酸杆菌MRS肉汤 |
| 288120 | 10 kg | EA | Difco | Lactobacilli MRS Broth | 乳酸杆菌MRS肉汤 |
| 215620 | 500 g | EA | Difco | Lactose Monohydrate | 乳糖,500G |
| 266520 | 500 g | EA | Difco | Lactose Peptone Broth | 乳糖蛋白胨肉汤 |
| 266510 | 10 kg | EA | Difco | Lactose Peptone Broth | 乳糖蛋白胨肉汤 |
| 215910 | 25 g | EA | Difco | L-Arabinose | L-阿拉伯糖 |
| 215920 | 100 g | EA | Difco | L-Arabinose | L-阿拉伯糖 |
| 211338 | 500 g | EA | BBL | Lauryl Sulfate Broth | Lauryl硫酸盐肉汤 |
| 211339 | 5 lb. | EA | BBL | Lauryl Sulfate Broth | 十二烷基硫酸盐肉汤 |
| 294369 | 25 lb. | EA | BBL | Lauryl Sulfate Broth | 十二烷基硫酸盐肉汤 |
| 224140 | 100 g | EA | Difco | Lauryl Sulfate Broth | 月桂基月示胰蛋白肉汤 |
| 224150 | 500 g | EA | Difco | Lauryl Sulfate Broth | 月桂胰胨肉汤 |
| 224120 | 2 kg | EA | Difco | Lauryl Sulfate Broth | 月桂胰胨肉汤 |
| 224130 | 10 kg | EA | Difco | Lauryl Sulfate Broth | 月桂基月示胰蛋白肉汤 |
| 298076 | 500 g | EA | BBL | Lauryl Sulfate Broth with MUG | 月桂胰蛋白肉汤,含MUG |
| 211740 | 100 g | EA | Difco | Lauryl Tryptose Broth with MUG | MUG月桂胰胨肉汤 |
| 211744 | 500 g | EA | Difco | Lauryl Tryptose Broth with MUG | 月桂基胰蛋白月示肉汤W/MUG |
| 240110 | 500 g | EA | Difco | LB Agar, Lennox | LB LENNOX琼脂 |
| 244520 | 500 g | EA | Difco | LB Agar, Miller (Luria-Bertani) | LB MILLER琼脂 |
| 244510 | 2 kg | EA | Difco | LB Agar, Miller (Luria-Bertani) | LB MILLER琼脂 |
| 292438 | 500g | EA | Difco | LB Broth Base, Select APS™ (Alternative Protein Source) | 选择性APS LB肉汤基础 |
| 212484 | 10 kg | EA | Difco | LB Broth Base, Select APS™ (Alternative Protein Source) | 选择性APS LB肉汤基础 |
| 240230 | 500 g | EA | Difco | LB Broth, Lennox | LB肉汤,Lennox |
| 240210 | 2 kg | EA | Difco | LB Broth, Lennox | LB LENNOX肉汤 |
| 240220 | 10 kg | EA | Difco | LB Broth, Lennox | LB LENNOX肉汤 |
| 244620 | 500 g | EA | Difco | LB Broth, Miller (Luria-Bertani) | LB MILLER肉汤 |
| 244610 | 2 kg | EA | Difco | LB Broth, Miller (Luria-Bertani) | LB MILLER肉汤 |
| 214906 | 10 kg | EA | Difco | LB Broth, Miller (Luria-Bertani) | LB MILLER肉汤 |
| 211327 | 500 g | EA | BBL | LBS (Lactobacillus Selection) Agar | LBS琼脂 |
| 211331 | 500 g | EA | BBL | LBS (Lactobacillus Selection) Broth | LBS肉汤 |
| 218301 | 500 g | EA | Difco | Legionella Agar Base | 军团杆菌琼脂基础 |
| 233901 | 6 | SP | Difco | Legionella Agar Enrichment, 5 mL | 军团菌琼脂营养添加剂,6×5ML |
| 279510 | 6 | SP | Difco | Leptospira Enrichment EMJH, 100 mL | 钩端螺旋体增菌液 |
| 211883 |
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文献和实验17-酮甾类(酮类固醇) 17-ketosteroid,17 oxosteroid
甾类骨架上第 17位碳原子上的氧基的化合物之总称,缩写 17KS。在生物体内,是由 17位羟基的酶促氧化和 C17 -C20 键切断生成的。在尿中含有来自副肾皮质的去氢表雄酮及其硫酸酯,睾丸酮的代谢物雄酮和表雄酮等。雌酮也以 17-酮甾类的形态存在着。因为副肾皮质和卵巢肿瘤患者的尿中的排出量很高,所以可作为临床的诊断指标。又因 17-酮甾类在碱性间 -硝基苯溶液中呈紫色,所以可进行定量测定。
C18 H24 O2 雌甾 -1, 3, 5( 10) -三烯 -3, 17-二醇。系代表性的性激素,可用卵巢、胎盘等制备,在卵泡液、胎盘、妊娠马尿中均可检出。进入子宫上皮细胞后,与性激素受体形成复合体进入细胞核,从而促进新的蛋白质合成,具有引起细胞增殖的作用。此外,能影响未成熟或切除卵巢的大鼠或小鼠的阴道分泌物,使呈现由角化细胞组成的显微镜象,所以也用作生物试验。在生物体内,在 17β -羟甾类脱氢酶的作用下氧化成为雌酮。 17α -羟甾体性激素的作用弱。作为女性
and memory in aged mice via Fgf17. Nature (2022). 2. Castellano, J. M. et al. Human umbilical cord plasma proteins revitalize hippocampal function in aged mice. Nature 544, 488–492 (2017). 3. Fame, R. M. & Lehtinen, M. K. Emergence and developmental roles
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