덱스트란

덱스트란 속성

덱스트란 MSDS

Dextran

덱스트란 C화학적 특성, 용도, 생산

순도시험

  (1) 비소 : 이 품목을 비소시험법에 따라 시험할 때, 그 양은 4.0ppm 이하이어야 한다.

  (2) 납 : 이 품목 5.0g을 취하여 원자흡광광도법 또는 유도결합플라즈마발광광도법에 따라 시험할 때, 그 양은 10.0ppm 이하이어야 한다.

  (3) 세균수 : 이 품목은 「식품의 기준 및 규격」일반시험법의 미생물시험법 중 세균수(일반세균수)에 따라 시험할 때, 1g당 10,000 이하이어야 한다.

  (4) 대장균 : 이 품목 25g을 취하여 「식품의 기준 및 규격」일반시험법의 미생물시험법 중 대장균에 따라 시험할 때, 음성(-)이어야 한다.

  (5) 총질소 : 이 품목 0.5g을 정밀히 달아 질소정량법에 따라 시험할 때, 그 양은 1.0% 이하이어야 한다.

확인시험

  이 품목의 수용액(1→3,000) 1mL에 안트론시액 2mL를 가할 때 액은 청녹색을 나타내고, 서서히 암청녹색으로 변한다. 다시 황산(1→2) 1mL 또는 초산 1mL를 가한 액의 색은 변하지 않는다.

강열잔류물

  이 품목을 정밀히 달아 강열잔류물시험법에 따라 시험할 때, 그 양은 2.0% 이하이어야 한다.

개요

Dextrans are glucose polymers produced by bacteria linked in an α-1,6 chain and having an α-1,3 or α-1,4 branch about every fifth residue. The specific positioning of the branching varies by the bacterium producing it. The molecular weights of these chains generally are 40 or 70 kDa (dextran-40 and dextran-70, respectively), and the compounds work via an osmotic gradient similar to the colloids and hypertonic crystalloid solutions.
Dextrans have a longer intravascular residence time than albumin, which limits interstitial edema. As with the crystalloids and other colloids, the dextrans have no oxygen-carrying capacity. Furthermore, because they are bacterial products, the dextrans have the potential to be potent antigens and induce anaphylaxis.

화학적 성질

white crystals or powder

용도

Dextran is a polysaccharide composed of glucose molecules used as an antithrombotic to reduce blood viscosity and as a volume expander in anemia. Studies show that it inhibits the mannose receptor-med iated clearance of tissue-type plasminogen activator (t-PA).

정의

dextran: A glutinous glucose polymerproduced by certain bacteria. Itcan be made by fermenting sucrose(cane sugar) and is used as a thickeningagent, as a stabilizer in ice cream,and as a substitute for plasma inblood transfusions. Esters with sulphuricacid yield sodium salts thatare employed as anticoagulant drugs.

일반 설명

Dextrans are polysaccharides with molecular weights ≥1,000 Dalton, with a linear backbone of α-linked D-glucopyranosyl repeating units. Dextrans are found as bacterial extracellular polysaccharides. They are synthesized from sucrose by Leuconostoc mesenteroides and Lactobacillus brevis. Bacteria employ dextran in biofilm formation or as a protective coating to evade host phagocytes in the case of pathogenic bacteria.
Dextran from Leuconostoc mesenteroides (Mw: 12,000) may be used as an analytical standard to calibrate the column for gel permeation chromatography (GPC).

Mechanism of action

Safety Profile

Suspected carcinogen with experimental carcinogenic data. When heated to decomposition it emits acrid smoke and fumes. See also other DEXTRANS.

Purification Methods

Solutions of dextran keep indefinitely at room temperature if 0.2mL of Roccal (10% alkyldimethylbenzylammonium chloride) or 2mg phenyl mercuric acetate are added per 100mL solution. This inhibits mould growth. [Scott & Melvin Anal Biochem 25 1656 1953.]

덱스트란 준비 용품 및 원자재

원자재

준비 용품

덱스트란 공급 업체

공급자	전화	이메일	국가	제품 수	이점
QINGDAO HONG JIN CHEMCIAL CO.,LTD.	532-83657313 18663969289;	hjt@hong-jin.com	China	227	58
SIMAGCHEM CORP	+86-13806087780	sale@simagchem.com	China	17365	58
Dayang Chem (Hangzhou) Co.,Ltd.	571-88938639 +8617705817739	info@dycnchem.com	China	52849	58
Hubei Aumei New Material Co., Ltd.	+86-027-87366298 +8615927270571	tianyi@skbiology.cn	China	282	58
LEAPCHEM CO., LTD.	+86-852-30606658	market18@leapchem.com	China	43340	58
Hebei Chuanghai Biotechnology Co., Ltd	+86-15531157085 +86-15531157085	abby@chuanghaibio.com	China	8809	58
Shaanxi Dideu Medichem Co. Ltd	+86-29-81148696 +86-15536356810	1022@dideu.com	China	3882	58
Hebei Mujin Biotechnology Co.,Ltd	+86 13288715578 +8613288715578	sales@hbmojin.com	China	12818	58
Hebei Chuanghai Biotechnology Co,.LTD	+86-13131129325	sales1@chuanghaibio.com	China	5876	58
Wuhan Quanjinci New Material Co.,Ltd.	+86-15271838296; +8615271838296	kyra@quanjinci.com	China	1512	58

덱스트란 관련 검색: