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防腐木自身的穩定性問題

來源:http://www.missoularedtape.com 時間:2022-11-07

生物質基木材膠粘劑一般都是偏離中性的物質,因此所選防腐劑自身能在強酸、強堿條件下穩定,以利在膠粘劑的儲藏時間內保持藥物的濃度。濟南防腐木如傳統上使用的五氯酚鈉見光受熱時易分解,百菌清在強堿性分解釋放HCl。這些特性也是防腐藥劑選擇的參考指標。
Biomass based wood adhesives are generally neutral substances, so the selected preservatives can be stable under strong acid and alkali conditions to maintain the drug concentration during the storage of adhesives. Jinan antiseptic wood, such as sodium pentachlorophenol traditionally used, is easy to decompose when exposed to light and heat, and chlorothalonil is decomposed in strong alkaline solution to release HCl. These characteristics are also reference indicators for selection of anti-corrosion agents.
20世紀70年代開發成功的BIT系列工業殺菌產品包括BIT原粉、PT液、BTC液、BTG液、BTX液等,主要活性成分為1,2-苯并異噻唑啉-3-酮。在pH4~12的范圍內易溶,氨存在時穩定。對細菌、霉菌、酵母菌均有顯著效果,且殺菌效率高,添加0.005%~0.05%即可。性能穩定,在200?高溫下殺菌效力仍不變。使用方便,不產生污染,對金屬無腐蝕。低毒,LD50>1400mg·kg-1。因此不僅在豆膠儲藏中使用,即使經過熱壓(100~140?)也無妨,可以把藥效維持到板材的防腐中;抗菌劑一定是具有抗微生物酶解的能力的抗代謝性,才能延長抗菌作用時間,如溴代肉桂醛不是酶促合成的天然有機物,在微生物體內不易被酶促分解,抗菌期可提高350倍。
The BIT series industrial bactericidal products successfully developed in the 1970s include BIT raw powder, PT solution, BTC solution, BTG solution, BTX solution, etc. The main active ingredient is 1,2-benzoisothiazoline-3-one. It is soluble in the range of pH 4~12 and stable in the presence of ammonia. It has significant effect on bacteria, mold and yeast, and has high sterilization efficiency. 0.005%~0.05% can be added. Stable performance at 200? The germicidal efficacy remains unchanged under high temperature. Easy to use, no pollution, no corrosion to metal. Low toxicity, LD50>1400mg · kg-1. Therefore, it is not only used in bean glue storage, even after hot pressing (100~140?) It is also OK to maintain the efficacy to the anti-corrosion of the plate; The antimicrobials must be antimetabolic with the ability of anti microbial enzymolysis in order to extend the antibacterial action time. For example, bromo cinnamaldehyde is not a natural organic substance that is enzymatically synthesized, and is not easy to be enzymatically decomposed in microorganisms. The antibacterial period can be increased by 350 times.
微生物的抗藥性形成的機理及其對策
Mechanism and Countermeasure of Microbial Drug Resistance Formation
微生物基因輕微的突變就可以形成新的耐藥性生理代謝新途徑。新興防腐技術核心是設法干擾微生物為抵抗各種環境而生存所進化形成的自我平衡調節機制。由于單一防腐劑抗菌、驅蟲的范圍比較狹窄,容易在短時間內誘導出微生物的抗藥性。為了發揮防腐劑的Z大功效盡量降低其負面影響,采用防腐劑復配已經成為世界性的趨勢,并取得了很好的效果。一般將2種或幾種具有相加效應或協同效應防腐劑按一定比例合理混合,不但可以克服單一防腐劑使用時的不足,而且還會產生一些新的特性。如將具有不同抑菌機理的抗菌劑配合,產生單一藥劑無法實現的超廣抗菌譜,使得大多數的突變株都失去生存的基礎。從而干擾微生物抗藥性的形成,收到Z佳的防腐效果。
The slight mutation of microbial gene can form a new physiological metabolic pathway of drug resistance. The core of emerging anti-corrosion technology is to try to interfere with the self balance regulation mechanism evolved by microorganisms to survive against various environments. Due to the narrow scope of antibacterial and insect repellent of a single preservative, it is easy to induce microbial resistance in a short time. In order to give full play to the Z-effect of preservatives and minimize their negative effects, the use of preservatives has become a worldwide trend, and has achieved good results. Generally, two or more preservatives with additive or synergistic effects are reasonably mixed in a certain proportion, which can not only overcome the shortcomings of single preservatives, but also produce some new characteristics. If the antibacterial agents with different antibacterial mechanisms are combined to produce an ultra broad antibacterial spectrum that can not be achieved by a single agent, most of the mutants will lose the basis for survival. Thus, it interferes with the formation of microbial drug resistance, and receives Z's good anti-corrosion effect.
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