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Fluoro-Gold：Fluorochrome公司少见授权代理，现货促销！
中国一授权总代 美国 Fluorochorome 公司于1985 年成立于美国科罗拉多州丹佛市，Fluorochorome 一直致力于荧光染料的研究与开发，其**产品Fluoro-Gold（荧光金）自 1985 年来在**范围内被广泛应用，并有大量的参考文献。同时，Fluorochrome公司特别开发了高灵敏度的 Fluoro-Gold Antibody 、以及Fluoro-Ruby（红色荧光金）等产品，Fluorochrome 公司坚 持以优质的产品和热情的服务赢得了良好的**度和口碑。 公司信息 品牌商名称：Fluorochrome.LLC 联系电话：(303) 394-1000 联系地址：1801 Williams Street, Suite 100 Denver, Colorado 80218 USA 公司官网 代理商列表 代理商名称 联系电话 销售区域 深圳市豪地华拓生物科技有限公司 020-85557146 0755-26055215 0755-33654576 0755-36953798 全国 丁香通一代理认证链接/brand/ff80808151482b4d015157247a2467eb/brand.htm 拒绝假冒伪劣产品，维护客户权益和品牌形象！ 荧光金(Fluoro-Gold)是Fluorochrome 公司经过多年研究开发出来的**产品。荧光金(Fluoro-Gold)在化学结构上有区别于普通的羟脒替，从而物理性质也截然不同。近30年来，Fluoro-Gold占据**市场，得到广大科研人员的一致认可。 假冒伪劣产品特点：供应公司声称自己为品牌的一级授权代理，但均无授权证明；只宣传宣传推广品牌，没有详细产品信息，并在其他正规网站均无授权认证信息。例如单做品牌的百度推广，代理信息无法证明的；替代产品所用普通的荧光染料价格非常低廉，以假乱真有丰富的利润可图，包装简陋，均低于市场均价，质量差，效果存在较大差异，导致老师实验受到影响 而重新订购。 客户和经销商朋友订购时完全可要求提供Fluorochrome公司出货单及国际快递单号。务必确认产品为正规来源。 近期收到一些水货及假货的投诉，有的导致老师实验受到严重影响，我们和Fluorochrome公司特此声明： 深圳市豪地华拓生物科技有限公司为 Fluorochrome公司在中国大陆及港澳地区的*少见授权代理。我们可以提供完善的技术支持和售后**。 我公司2005年开始代理和推广 Fluorochrome公司产品，其中文名称“荧光金”源自广州华拓公司，其货号“FC10001、FC20001…“为华拓公司自编货号：我们的价格优势-Fluorochrome正品国内较低价。 华拓生物公司联系方式： e-mail:order@ Telephone:（86）0755-26055215 Fluorochrome公司直接联系方式：e-mail: info@ Telephone:(303) 394-1000 Fax: (303) 321-1119 客户如订购到伪劣产品请保留好订购合同，发票，收货单或快递单号，并及时和我们联系。 Fig.1 Amygdala cells (40X) after Fluoro-Gold injection in the PVN. Antibody is at 1/50,000 Fig.2 High magnification view of Fluoro-Ruby labeled axons, terminals and vascular pericytes as seen in the rat striatum following tracerinjection into the contralateral substantia nigra. 荧光金 Fluoro-Gold 20mg Fluorochrome 荧光金 Fluoro-Gold 50mg Fluorochrome 荧光金 Fluoro-Gold 100mg Fluorochrome 荧光金 Fluoro-Gold 150mg Fluorochrome 荧光金 Fluoro-Gold 200mg Fluorochrome 荧光金抗体 Antibody to Fluoro-Gold 0.1ml×1 Fluorochrome 荧光金抗体 Antibody to Fluoro-Gold 0.1ml×2 Fluorochrome 荧光金抗体 Antibody to Fluoro-Gold 0.1ml×3 Fluorochrome 红色荧光金 Fluoro-Ruby 30mg Fluorochrome 荧光金说明书 FLUOROCHROME,LLC 1801 Williams Street, Suite 100 Denver, Colorado 80218 USA Telephone:(303) 394-1000 e-mail: info@ Fax: (303) 321-1119 website: Fluoro-Gold Protocol and Use Guide Main Protocol 1. Background The use of Fluoro-Gold is essentially the same as other fluorescent tracers. The main difference is that Fluoro-Gold is more flexible in terms of post-injection survival times, concentration range, tissue treatment and compatibility with other histochemical techniques. 2. Storage and Shelf Life Dry Fluoro-Gold should be kept in a light tight closed container at 4 degrees Celsius. Stored properly, Fluorogold should have a shelf life exceeding one year. The dye in solution should also be kept in a light tight closed container at 4 degrees Celsius and should remain stable for at least six months. 3. Vehicle Fluoro-Gold can be dissolved in distilled water or 0.9% saline, or utilized as a suspension in 0.2M neutral phosphate buffer. 4. Dye Concentration Fluoro-Gold has been successfully used at concentrations ranging from 1-10%. Initially, a 4% concentration is advised. If undesirable necrosis occurs at the injection site, or labeling is too intense, reduce the concentration to a 2% solution. If you need to use more precise measurements, the molecular weight of Fluoro-Gold is 532.6 daltons. 5. Dye Administration A. Pressure Injection - This is probably the most frequently used mode of application. Volumes injected range from .05-1 μl, typically .1-.2 μl. B. Iontophoresis - Discrete, small injection sites result from 4-10 second pulsed iontophoretic (+5 to +10ua/10min) application. C. Crystal - A crystal of the tracer can be administered from the tip of a micro-pipette. 6. Post-0perative Survival Period Good retrograde labeling has been observed with periods ranging from two days to two months. Survival periods of three to five days are typical. Long survival periods enhance filling of distal processes without diffusion of the dye from the cell. 7. Fixation Almost any fixative, or no fixative, can be used, Phosphate neutral buffered saline containing 4% formaldehyde is frequently employed. Fixatives containing high concentrations of heavy metals (e.g. osmium, mercury) will quench the fluorescence, while high concentrations (over 1%) of glutaraldehyde may increase background fluorescence 8. Histochemical Processing Tissue containing Fluoro-Gold may be processed according to virtually any common histological technique. This includes cryostat sections of unfixed tissue (10 μm), frozen sections of fixed tissue (20 μm), and thin sections cut from tissue imbedded in either plastic (.2-4 μm) or paraffin (3-10 μm). Frozen sections of fixed tissue are most frequently used. 9. Combined Methods At this point of processing, sections may be further processed for a second marker such as autoradiography, HRP histochemistry, immunocytochemistry, a second fluorescent tracer, fluorescent counterstain, etc. 10. Mounting, Clearing and Coverslipping Sections are typically mounted on gelatin-coated slides, air-dried, immersed in xylene, and coverslipped with nonfluorescent DPX plastic mounting media. Sections may be dehydrated with graded alcohols, unless this is not compatible with a second tracer. If Fluoro-Gold is to be combined with fluorescence immunocytochemistry, then sections are air-dried and directly coverslipped with neutral buffered glycerine (1:2). 11. Examination and Photography Fluoro-Gold can be visualized with a fluorescence microscope using a wide band ultraviolet excitation filter. A gold color is emitted when tissue has been processed with neutral pH buffer, whereas a blue color is emitted when tissue is processed with acidic (e.g. pH 3.3) pH buffer. It can be photographed digitally or with film (use Ektachrome 200-400 ASA film for color prints and comparable speed film for black and white prints, for example Tri-X). Most exposure times range from 10-60 second exposures, depending on the objective magnification and the intensity of the label. Thirty (30) second exposures are about average. Multiple exposures may be exploited to simultaneously visualize Fluoro-Gold and another tracer. Thus, UV would be combined with bright field illumination to simultaneously locate Fluoro-Gold with HRP or silver grains in autoradiography. Similarly, blue light excitation can be combined to also visualize the green emission color of FITC, while green excitation light may be used to simultaneously observe the red emission color of propidium iodide, or ethidium bromide (a fluorescent counterstain). Additional Information Concerning the Use of Fluoro-Gold Vehicle For pressure injections through a microsyringe or micropipette, Fluoro-Gold should be dissolved in distilled water or .9% saline. Fluoro-Gold may also be utilized as a suspension in .2M neutral phosphate buffer, however, the suspended particles may clog a fine micropipette tip so distilled water or .9% saline is the preferred vehicle. For iontophoresis, a 1% Fluoro-Gold solution is made up in .1M acetate buffer (pH=3.3). Well-cleaned (95% ETOH, water) glass micropipettes should have tips of 10-20 μm. Optimal iontophoresis parameters are +1 to +5u amps delivered with pulsed current (4-10 seconds on, 4-10 seconds off) over a 10-20 minute period. Injection Sites Virtually any central or peripheral nervous system structure can be injected with Fluoro-Gold for analysis of retrograde transport. In the peripheral nervous system, ganglia and peripheral targets can be studied. For studies of peripheral nerve, the nerve should be cut or damaged and either dipped in, or injected with, aq 5% solution of Fluoro-Gold. Since Fluoro-Gold is not significantly taken up by intact fibers of passage, the fibers must be cut or severely damaged for uptake of the dye to occur. Transport and Survival Time Fluoro-Gold is used as a retrograde axonal tracer, although orthograde axonal transport does occur. The survival time should be varied (especially to very short survival times of 12 hours - 2 days) to maximize orthograde transport in the specific neuronal system under study. For retrograde transport, the survival times should be varied from 4 days to 14 days. Seven to 10 days works for most systems, although long pathways (e.g., spinal cord to brainstem) and pathways in large mammals (e.g., cats, monkeys) may require longer survival times (e.g., 14 days). In addition, since Fluoro-Gold remains fast within retrogradely labeled neurons, survival times of several months will also produce excellent results. For iontophoresis, a 2-5 day survival time is recommended. It is estimated that transport occurs at about 2 cm per day for mammals; it is slower for cold-blooded animals. Tissue Processing Tissue processing is covered in detail in the use guide and in the original publication (Schmued and Fallon, 1986, Brain Research 377:147-154). Since Fluoro-Gold is stable in many solvents and remains fast within retrogradely labeled neurons, it's use is compatible with many histochemical techniques. It can be used with other retrograde tracers, immunofluorescence, ** and ABC immunocytochemistry, HRP histochemistry, autoradiography, counterstains (ethidium bromide is the preferred fluorescent counterstain), paraffin embedding and plastic embedding. However, if tissue is unfixed, additional processing of tissue in aqueous solutions for over an hour or two will result in loss of Fluoro-Gold fluorescence from labeled neurons. Fluoro-Gold may be useful in electron microscopy. Fluoro-Gold can be used in a brain which has been sectioned and transferred to phosphate buffer. Sections are typically mounted on gelatin-coated slides, air dried, immersed in xylene and coverslipped with DPX plastic mounting media (FLUKA Chemical Corp., 255 Oser Avenue, Hauppauge, New York, 11788, Catalog #44581). Tissue may also be viewed on slides without further processing, can be run through graded alcohols for dehydration, or, for immunocytochemistry, the sections can be air dried and directly coverslipped with neutral buffered glycerine (1:2). Examination and Photography Fluoro-Gold is visualized with a fluorescence microscope using a wide band ultraviolet (UV) excitation filter. Use the same filter pack you would for other fluorescent retrograde tracers excited under wide band UV (e.g., True Blue, Fast Blue, Nuclear Yellow), such as the Leitz Ploem filter system A (Wide Band UV, Excitation filter BP 340-380), Mirror RKP 400, Barrier Filter LP 430). Objectives should be made especially for fluorescence microscopy (such as that made by Zeiss) glycerine, or water. Since plastic does absorb UV light, it is not advised to view through plastic petri dishes, etc. Recommended films are T-Max (Kodak, black & white) and Ektachrome 200 (Kodak, color slides). Exposure times usually vary from 20 seconds to 1.5 minutes. Chemical Analysis Quality Expected Result Actual Result Appearance A golden-yellow, hygroscopic, crystalline powder A bright-yellow powder Odor None None Solution 20 ml of a 5% w/v aqueous solution should be clean, clear and almost free from suspended matter, and should have not more than a very slight odor Passes Test pH of a 1% Solution Between 4.0 and 5.5 at 25 degrees Celsius 4.6 Spectral characteristics The spectral characteristics of Fluoro-Gold vary with pH A 0.1% solution in distilled water has a pH of 4.5 and excitation peak of 414 nm and emission peak of 541 nm Fluoro-Gold bound to membranes at a physiological pH of 7.4 has an excitation band of 350 to 395 nm and an emission band of 530 to 600 nm Chloride Not more than 0.035% 0.017% Sulfate Not more than 0.1% Less than 0.05% Sulfated ash Not more than 0.1% Negligible Heavy metals Not more than 10 p.p.m Less than 10 p.p.m Selenium Not more than 30 p.p.m Less than 10 p.p.m. Loss on drying Not more than 1.0% after 3 hours in vacuo at 60 degrees Celsius 0.1% Assay Between 95.0 and 105.0% calculated with reference to the dried material 99.2% Notice: The original and only true Fluoro-Gold (Fluorogold) is produced by Fluorochrome, LLC and marketed by Fluorochrome, LLC and Histo-Chem Inc. Fluoro-Gold (Fluorogold) is an exclusive product of Fluorochrome, LLC. It has been sold by Fluorochrome and widely used since 1985. Other companies are marketing a product they claim is the same as or equivalent to Fluoro-Gold. In fact, the chemical structures of these compounds seem to be different from Fluoro-Gold. Certain physical properties of the compounds may be very different. *CAUTION: Fluoro-Gold, Antibody to Fluoro-Gold and Fluoro-Ruby are for investigational use only in laboratory research animals or for tests in vitro. NOT FOR USE IN HUMANS. These drugs should be used only by persons regularly engaged in conducting neuroanatomical studies and tests in vitro or in animals used only for laboratory research. 深圳市豪地华拓生物
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