詳細(xì)介紹
人禽流感檢測(cè)試劑盒(膠體金法)
廣州健侖生物科技有限公司
廣州健侖長(zhǎng)期供應(yīng)各種PCR試劑盒,主要代理進(jìn)口和國(guó)產(chǎn)品牌的流行病毒PCR檢測(cè)試劑盒。例如:甲乙型流感病毒核酸檢測(cè)試劑盒、黃熱病毒核酸檢測(cè)試劑盒、諾如病毒核酸檢測(cè)試劑盒、登革病毒核酸檢測(cè)試劑盒、基孔肯雅病毒核酸檢測(cè)試劑盒、結(jié)核桿菌核酸病毒檢測(cè)試劑盒、孢疹病毒核算檢測(cè)試劑盒、西尼羅河病毒PCR檢測(cè)試劑盒、呼吸道合胞病毒核酸檢測(cè)試劑盒、冠狀病毒PCR檢測(cè)試劑盒等等。蟲(chóng)媒體染病系列、呼吸道病原體系列、發(fā)熱伴出疹系列、消化道及食源感染系列。
廣州健侖長(zhǎng)期供應(yīng)各種流感檢測(cè)試劑,包括進(jìn)口和國(guó)產(chǎn)的品牌,主要包括日本富士瑞必歐、日本生研、美國(guó)BD、美國(guó)NovaBios、美國(guó)binaxNOW、英國(guó)clearview、凱必利、廣州創(chuàng)侖等主流品牌。
主要檢測(cè):甲型流感病毒檢測(cè)試劑、乙型流感病毒檢測(cè)試劑、甲乙型流感病毒檢測(cè)試劑、A+B流感病毒檢測(cè)試劑盒、流感病毒抗原快速檢測(cè)卡、流感病毒抗體快速檢測(cè)試劑盒、流感快速檢測(cè)試劑 c1c2。
人禽流感檢測(cè)試劑盒(膠體金法)
我司還提供其它進(jìn)口或國(guó)產(chǎn)試劑盒:登革熱、瘧疾、流感、A鏈球菌、合胞病毒、腮病毒、乙腦、寨卡、黃熱病、基孔肯雅熱、克錐蟲(chóng)病、違禁品濫用、肺炎球菌、軍團(tuán)菌、化妝品檢測(cè)、食品安全檢測(cè)等試劑盒以及日本生研細(xì)菌分型診斷血清、德國(guó)SiFin診斷血清、丹麥SSI診斷血清等產(chǎn)品。
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【公司名稱】 廣州健侖生物科技有限公司
【市場(chǎng)部】 歐
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【騰訊 】
【公司地址】 廣州清華科技園創(chuàng)新基地番禺石樓鎮(zhèn)創(chuàng)啟路63號(hào)二期2幢101-103室
細(xì)菌和其它原核生物一樣,沒(méi)有核膜,DNA集中在細(xì)胞質(zhì)中的低電子密度區(qū),稱核區(qū)或核質(zhì)體(nuclear body)。細(xì)菌一般具有1-4個(gè)核質(zhì)體,多的可達(dá)20余個(gè)。核質(zhì)體是環(huán)狀的雙鏈DNA分子,所含的遺傳信息量可編碼2000-3000種蛋白質(zhì),空間構(gòu)建十分精簡(jiǎn),沒(méi)有內(nèi)含子。由于沒(méi)有核膜,因此DNA的復(fù)制、RNA的轉(zhuǎn)錄與蛋白的質(zhì)合成可同時(shí)進(jìn)行,而不像真核細(xì)胞那樣在生化反應(yīng)在時(shí)間和空間上是嚴(yán)格分隔開(kāi)來(lái)的。
每個(gè)細(xì)菌細(xì)胞約含5000-50000個(gè)核糖體,部分附著在細(xì)胞膜內(nèi)側(cè),大部分游離于細(xì)胞質(zhì)中。細(xì)菌核糖體的沉降系數(shù)為70S,由大亞單位(50S)與小亞單位(30S)組成,大亞單位含有23SrRNA與30多種蛋白質(zhì),小亞單位含有16SrRNA與20多種蛋白質(zhì)。30S的小亞單位對(duì)四環(huán)素與鏈霉素很敏感,50S的大亞單位對(duì)紅霉素與氯霉素很敏感。
細(xì)菌核區(qū)DNA以外的,可進(jìn)行自主復(fù)制的遺傳因子,稱為質(zhì)粒(plasmid)。質(zhì)粒是裸露的環(huán)狀雙鏈DNA分子,所含遺傳信息量為2-200個(gè)基因,能進(jìn)行自我復(fù)制,有時(shí)能整合到核DNA中去。質(zhì)粒DNA在遺傳工程研究中很重要,常用作基因重組與基因轉(zhuǎn)移的載體。
胞質(zhì)顆粒是細(xì)胞質(zhì)中的顆粒,起暫時(shí)貯存營(yíng)養(yǎng)物質(zhì)的作用,包括多糖、脂類、多磷酸鹽等。
擬核
擬核(nucleoid)存在于原核生物,是沒(méi)有由核膜包被的細(xì)胞核,也沒(méi)有染色體,只有一個(gè)位于形狀不規(guī)則且邊界不明顯區(qū)域的環(huán)形DNA分子。內(nèi)含遺傳物質(zhì)。里面的核酸為雙股螺旋形式的環(huán)狀DNA,且同時(shí)具有多個(gè)相同的復(fù)制品。
其他結(jié)構(gòu)
許多細(xì)菌的zui外表還覆蓋著一層多糖類物質(zhì),其中邊界明顯的稱為莢膜,如肺炎球菌,邊界不明顯的稱為粘液層(slime layer),如葡萄球菌。莢膜對(duì)細(xì)菌的生存具有重要意義,細(xì)菌不僅可利用莢膜抵御不良環(huán)境;保護(hù)自身不受白細(xì)胞吞噬;而且能有選擇地粘附到特定細(xì)胞的表面上,表現(xiàn)出對(duì)靶細(xì)胞的專一攻擊能力。例如,傷寒沙門(mén)桿菌能專一性地侵犯腸道淋巴組織。細(xì)菌莢膜的纖絲還能把細(xì)菌分泌的消化酶貯存起來(lái),以備攻擊靶細(xì)胞之需。
鞭毛是某些細(xì)菌的運(yùn)動(dòng)器官,由一種稱為鞭毛蛋白(flagellin)的彈性蛋白構(gòu)成,結(jié)構(gòu)上不同于真核生物的鞭毛。細(xì)菌可以通過(guò)調(diào)整鞭毛旋轉(zhuǎn)的方向(順時(shí)針和逆時(shí)針)來(lái)改變運(yùn)動(dòng)狀態(tài)。
菌毛是菌體表面極其細(xì)的蛋白纖維,須用電鏡觀察,特點(diǎn)是:細(xì)、短、直、硬、多。菌毛與細(xì)菌運(yùn)動(dòng)無(wú)關(guān),根據(jù)形態(tài)、結(jié)構(gòu)和功能,可分為普通菌毛和性菌毛兩類。前者與細(xì)菌吸附和侵染宿主有關(guān),后者為中空管子,與傳遞遺傳物質(zhì)有關(guān)。
Bacteria, like other prokaryotes, have no nuclear membrane, and DNA is concentrated in the low electron density regions in the cytoplasm, called the nuclear region or the nuclear body. Bacteria generally have 1-4 nucleosomes, up to more than 20. Nucleosomes are circular, double-stranded DNA molecules that contain a genetic code of 2,000 to 3,000 proteins and are constructed in a very compact space with no introns. Since there is no nuclear membrane, DNA replication, RNA transcription and protein synthesis can be carried out simultaneously, unlike eukaryotic cells in the biochemical reactions in the space and time is strictly separated.
Each bacterial cell contains about 5000-50000 ribosomes, some attached to the inside of the cell membrane, the majority of free in the cytoplasm. Bacterial ribosome sedimentation coefficient of 70S, by the large subunit (50S) and small subunit (30S) composition, the large subunit contains 23SrRNA and 30 kinds of protein, the small subunit contains 16SrRNA and 20 kinds of proteins. Small subunits of 30S are sensitive to tetracycline and streptomycin, and large subunits of 50S are sensitive to erythromycin and chloramphenicol.
Genetic factors other than DNA in the bacterial nuclear region that replicate autonomously are called plasmids. Plasmids are naked, circular, double-stranded DNA molecules that contain between 2 and 200 genes of genetic information and are capable of self-replication, sometimes integrated into nuclear DNA. Plasmid DNA is very important in genetic engineering and is often used as a vector for gene recombination and gene transfer.
Cytoplasmic granules are particles in the cytoplasm, from the temporary storage of nutrients, including polysaccharides, lipids, polyphosphates and so on.
To be nuclear
Nucleoids exist in prokaryotes, which are nuclei that are not covered by the nuclear membrane and have no chromosomes. There is only one circular DNA molecule located in an irregularly shaped area with an insignificant boundary. Contains genetic material. The nucleic acid inside is circular DNA in the form of a double-stranded helix and has multiple identical copies at the same time.
Other structures
The outermost surface of many bacteria is also covered with a layer of polysaccharides, the borders of which are clearly called capsular membranes, such as pneumococcal bacteria, and slime layers, such as staphylococci, whose boundaries are not clearly known. Capsules are important for the survival of bacteria, which not only utilize the capsule against unfavorable environments, protect themselves from leukocyte engraftment, but also selectively adhere to the surface of specific cells, displaying a specific attack on target cells ability. For example, Salmonella typhi can specifically invade intestinal lymphoid tissue. Bacterial capsular fibrils also store the digestive enzymes secreted by the bacteria in preparation for attack on target cells.
Flagella, the movement organ of certain bacteria, consists of an elastin called flagellin that is structurally different from the eukaryotic flagella. Bacteria can change the state of motion by adjusting the direction of rotation of the flagella (clockwise and counterclockwise).
Pili is a very thin surface of bacterial protein fibers, to be observed by electron microscopy, characterized by: thin, short, straight, hard, and more. Pili and bacterial movement has nothing to do, according to the shape, structure and function, can be divided into two types of ordinary pili and pili. The former is related to bacterial adsorption and infection of the host, the latter is a hollow tube, and the transmission of genetic material.