深圳嘉典盛自動化有限公司主要產品為可程式控制器(PLC)、遠端輸出/輸入模組(RTU)、工業電腦(IPC).經營品牌:三菱、歐姆龍,艾默生
Synonyms | Listeriolysin-O, LLO, hlyA. |
Introduction | Listeriolysin O (aka LLO) is a hemolysin produced by Listeria monocytogenes bacteria, the pathogen responsible for causing listeriosis. The toxin may be regarded as a virulence factor, since it is crucial for the virulence of L. monocytogenes. LLO is a single polypeptide protein encoded by the hlyA gene and composed of 529 residues. LLO is a thiol-activated cholesterol-dependent pore forming toxin protein; therefore, it is activated by reducing agents and inhibited by oxidizing agents. Still, LLO differs from other thiol-activated toxins, as its cytolytic activity is maximized at a pH of 5.5. Inside the acidic phagosomes (average pH ~ 5.9) of cells that have phagocytosed L. monocytogenes, LLO is selectively activated by maximizing activity at a pH of 5.5. Following the phagosome lysis by LLO, the bacterium breaks out into the cytosol, where it is able to grow intracellularly, and the toxin has reduced activity in the more basic cytosol. Thus, LLO permits L. monocytogenes to break out from the phagosomes into the cytosol without harming the plasma membrane of the infected cell, which allows the bacteria to live intracellularly, where they are sheltered from extracellular immune system factors such as the complement system and antibodies. LLO also brings about dephosphorylation of histone H3 and deacetylation of histone H4 in the early phases of infection, before entry of L. monocytogenes into the host cell. The pore-forming activity is not implicated in causing the histone modifications. The modifications of the histones affect the down regulation of genes encoding proteins involved in the inflammatory response. Therefore, LLO may be significant in subverting the host immune response to L. monocytogenes. At its NH2-terminus it possesses a 25 residues long typical signal sequence excited during the secretion process. Moreover, in its NH2-terminus there is also a 19 amino acids PEST- like sequence that may target this toxin for degradation. The PEST-like sequence found in LLO and is considered crucial for virulence, given that mutants lacking the sequence lysed the host cell. Nevertheless, contrary to PEST's supposed role in protein degradation, evidence implies that the PEST-like sequence may control LLO production in the cytosol rather than increase degradation of LLO. |
Description | Molecular weight of Listeriolysin O is 58kDa. This haemolysin protein is provided in its mature form that is constituted by 503 amino acids, from 26 to 529 of the registered sequence (accession number: AAF64524). |
Source | Escherichia Coli. |
Physical Appearance | Sterile Filtered clear solution. |
Formulation | The protein contains 50mM NaH2PO4, 1mM EDTA, 2.7mM KCl, 1mM DTT, 5% glycerol and 0.5M NaCl. |
Stability | LLO although stable at room temperature for 1 week, should be stored desiccated below -18°C. Please prevent freeze-thaw cycles. |
Purity | Greater than 90.0% as determined by(a) Analysis by RP-HPLC. (b) Analysis by SDS-PAGE. |
Activity | LLO has a hemolytic activity 1.25x106 HU/mg. 2mM DTT is used to reactivate the toxin. |
Applications | a. Cytosolic delivery of molecules, peptides, oligonucleodides and plasmid DNA (4). b. Production of specific monoclonal antibodies (5). c. Detection of anti-listeriolysin O antibodies (6). |
Usage | Prospec's products are furnished for LABORATORY RESEARCH USE ONLY. The product may not be used as drugs, agricultural or pesticidal products, food additives or household chemicals. |
型號 | 儀器尺寸(mm) | 清洗槽內尺寸(mm) | 容量 | 超聲頻率 | 超聲功率 | 加熱功率 | 時間可調 |
| 長×寬×高 | 長×寬×高 | L | (KH) | (W) | (W) | (min) |
KQ116 | 223×114×123 | 167×90×52 | 0.6 | 40 | 50 | 無 | 10 |
KQ118 | 223×114×123 | 167×90×52 | 0.6 | 40 | 70 | 無 | 10 |
KQ218 | 223×114×123 | 167×90×52 | 0.6 | 40 | 100 | 無 | 10 |
KQ-50 | ф145×210 | ф140×100 | 1.5 | 40 | 50 | 無 | 無 |
KQ-50B | 170×160×210 | 150×140×100 | 2 | 40 | 50 | 無 | 1-20 |
KQ-50E | 208×192×210 | 150×140×100 | 2 | 40 | 50 | 100 | 1-20 |
KQ2200 | 260×160×260 | 230×140×100 | 3 | 40 | 100 | 無 | 1-20 |
KQ2200B | 260×160×260 | 230×140×100 | 3 | 40 | 100 | 200 | 1-20 |
KQ2200E | 260×160×280 | 230×140×100 | 3 | 40 | 100 | 200 | 1-20 |
KQ2200V | 340×250×330 | 230×140×130 | 4 | 40 | 100 | 200 | 1-20 |
KQ-100 | 320×174×260 | 300×150×100 | 4 | 40 | 100 | 無 | 1-20 |
KQ-100B | 320×174×260 | 300×150×100 | 4 | 40 | 100 | 400 | 1-20 |
KQ-100E | 320×174×280 | 300×150×100 | 4 | 40 | 100 | 400 | 1-20 |
KQ-100V | 410×260×330 | 300×150×130 | 5.8 | 40 | 100 | 400 | 1-20 |
KQ3200 | 320×174×320 | 300×150×150 | 6 | 40 | 150 | 無 | 1-20 |
KQ3200B | 320×174×320 | 300×150×150 | 6 | 40 | 150 | 400 | 1-20 |
KQ3200E | 320×264×340 | 300×150×150 | 6 | 40 | 150 | 400 | 1-20 |
KQ3200V | 410×260×380 | 300×150×180 | 8 | 40 | 150 | 400 | 1-20 |
KQ5200 | 320×264×320 | 300×240×150 | 10 | 40 | 200 | 無 | 1-20 |
KQ5200B | 320×264×320 | 300×240×150 | 10 | 40 | 200 | 400 | 1-20 |
KQ5200E | 320×264×340 | 300×240×150 | 10 | 40 | 200 | 400 | 1-20 |
KQ5200V | 410×350×380 | 300×240×180 | 13 | 40 | 200 | 400 | 1-20 |
KQ-250 | 320×264×320 | 300×240×150 | 10 | 40 | 250 | 無 | 1-20 |
KQ-250B | 320×264×320 | 300×240×150 | 10 | 40 | 250 | 400 | 1-20 |
KQ-250E | 320×264×340 | 300×240×150 | 10 | 40 | 250 | 400 | 1-20 |
KQ-250V | 410×350×380 | 300×240×180 | 13 | 40 | 250 | 400 | 1-20 |
KQ-300 | 320×264×320 | 300×240×150 | 10 | 40 | 300 | 無 | 1-20 |
KQ-300B | 320×264×320 | 300×240×150 | 10 | 40 | 300 | 400 | 1-20 |
KQ-300E | 320×264×340 | 300×240×150 | 10 | 40 | 300 | 400 | 1-20 |
KQ-300V | 410×350×380 | 300×240×180 | 13 | 40 | 300 | 400 | 1-20 |
KQ-500 | 530×320×360 | 500×300×150 | 22.5 | 40 | 500 | 無 | 1-20 |
KQ-500B | 530×320×360 | 500×300×150 | 22.5 | 40 | 500 | 800 | 1-20 |
KQ-500E | 530×320×380 | 500×300×150 | 22.5 | 40 | 500 | 800 | 1-20 |
KQ-500V | 610×410×380 | 500×300×180 | 27 | 40 | 500 | 800 | 1-20 |
KQ-600 | 530×320×360 | 500×300×150 | 22.5 | 40 | 600 | 無 | 1-20 |
KQ-600B | 530×320×360 | 500×300×150 | 22.5 | 40 | 600 | 800 | 1-20 |
KQ-600E | 530×320×380 | 500×300×150 | 22.5 | 40 | 600 | 800 | 1-20 |
KQ-600V | 610×410×380 | 500×300×180 | 27 | 40 | 600 | 800 | 1-20 |
KQ-700 | 530×320×360 | 500×300×150 | 22.5 | 40 | 700 | 無 | 1-20 |
KQ-700B | 530×320×360 | 500×300×150 | 22.5 | 40 | 700 | 800 | 1-20 |
KQ-700E | 530×320×380 | 500×300×150 | 22.5 | 40 | 700 | 800 | 1-20 |
KQ-700V | 610×410×380 | 500×300×180 | 27 | 40 | 700 | 800 | 1-20 |
------主要特點------ |
開關選擇交流輸入電壓范圍有短路保護/過載保護/過電壓保護/高溫保護國際安規認證:UL/CUL90KHz固定開關頻率由內置直流風扇強制通風冷卻自動控制開關強制通風冷卻100%滿載老化測試2年質保 ------主要指標------
交流輸入電壓 | ..........開關選擇88~132VAC/176~264VAC |
交流沖擊電流 | ..........冷啟動,115V時為15A/230V時為30A |
直流調整范圍 | ..........額定輸出電壓的±10% |
過載保護 | ..........過電流點在105%~150%時斷開,自動偵測,自動復原 |
過電壓保護點 | ..........額定輸出電壓的115%~135%時動作 |
初始化、上升、保持時間 | ..........230VAC滿載時2000ms,20ms,20ms |
絕緣特性 | ..........輸入端與輸出端間:3KVAC,輸入端與外殼間:1.5KVAC1分鐘 |
工作時環境溫度 | ..........0~40℃可滿載,-10℃時降載20%,60℃時降載40% (24V&48V 0~50℃可滿載, 60℃時降載40%) |
國際安規認證 | ..........通過UL60950-1認證 |
接線方式 | ..........9P/9.5mm帶蓋端子排 |
機殼型號 | ..........912 |
外形尺寸 | ..........215×115×50 mm |
重量及包裝 | ..........1.15公斤/只;每箱12只/15公斤/0.0283立方米 |
大量TBI螺母,滾珠絲桿,現貨供應,SFI3205,型號齊全
紅外測溫儀GM320
GM320生產廠家;深圳標智,GM320供應商;九九儀器公司。
GM320供應地址;深圳市龍華新區 民治 銀泉花園8棟105
GM320聯系人;金小姐 電話13129540276,QQ2317875228。
*測量范圍:-50 ~ 330℃ (-58~626℉)
*精確度:±1.5% or ±1.5℃
*重復性:±1% or ±1℃
*物距比:12:1
*發射率:0.95預設
*分辨率:0.1℃/℉
*響應時間:500毫秒
*響應波長:8-14μm
*℃/℉溫度單位轉換
*數據保持顯示
*定位激光開/關選擇
*LCD背光開/關選擇
*自動關機
*電源:2*1.5V AAA電池
*產品凈重:115.1克(含電池)
*產品尺寸:144.5*38*93厘米
*包裝方式:吸塑+卡紙
冷卻塔是集空氣動力學、熱力學、流體學、化學、生物化學、材料學、靜、動態結構力學,加工技術等多種學科為一體的綜合產物。水質為多變量的函 數,冷卻更是多因素,多變量與多效應綜合的過程。冷卻塔按水與空氣相對流動狀況不同,不同類型冷卻塔優、劣,是冷卻塔業界在學術上長期爭論不休的問題,這 種爭論有力地促進了冷卻塔的技術的發展,在爭論中各自揚長避短,使冷卻塔技術不斷完善,向節能降耗,提高效率,降低投資等目標不斷技術進步。 工業生產或制冷工藝過程中產生的廢熱,一般要用冷卻水來導走。冷卻塔的作用是將挾帶廢熱的冷卻水在塔內與空氣進行熱交換,使廢熱傳輸給空氣并散入大氣中。例如:火電廠內,鍋爐將水加熱成高溫高壓蒸汽,推動汽輪機做功使發電機發電,經汽輪機作功后的廢汽排入冷凝器,與冷卻水進行熱交換凝結成水,再用水泵打回鍋爐循環使用。這一過程中乏汽的廢熱傳給了冷卻水,使水溫度升高,挾帶廢熱的冷卻水,在冷卻塔中將熱量傳遞給空氣,從風筒處排入大氣環境中。冷卻塔應用范圍:主要應用于空調冷卻系統、冷凍系列、注塑、制革、發泡、發電、汽輪機、鋁型材加工、空壓機、工業水冷卻等領域,應用最多的為空調冷卻、冷凍、塑膠化工行業。
河北科勝320枕式面包、貓耳朵包裝機
(一)主要性能和結構特點
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( 二)適用范圍
適合于餅干、米通、雪餅、蛋黃派、巧克力、面包、方便面、月餅、日用品、 工業零件、紙盒或托盤等各類有規則物體的包裝。
(三)技術規格
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