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化工
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¾l†èŒç”Ÿç‰©è†œå¼•èµïL(f¨¥ng)š„伤å£æ„ŸæŸ“一直以æ¥å¨èƒç€äººç±»çš„å¥åºøP¼Œòq¶å¯å¼•è“v较高的死亡率。近òq´æ¥åQŒçº³¾cÏxŠ—èŒæ料在伤å£æ„ˆåˆçš„应用æˆä¸ÞZº†ç ”究焦点åQŒå…¶ä¸­åŸºäºŽå‚¬åŒ–活性的¾U³ç±³æŠ—èŒæ料备å—å…Ïx³¨ã€‚然而，¾l†èŒç”Ÿç‰©è†œå¾®çŽ¯å¢ƒä¸­çš„内æºæ€?/span>H2O2å«é‡è¾ƒä½ŽåQŒé™åˆ¶äº†æŠ—èŒå‰‚的催化‹zÀL€§ï¼Œæ·ÕdŠ å¤–æºæ€?/span>H2O2å´åˆä¼?x¨¬)对伤å£å‘¨å›´çš„å¥åºïL(f¨¥ng)»†èƒ?y¨­u)组¾l‡äñ”生副作用。因此，在æ高抗èŒå‰‚的抗èŒä½œç”¨çš„åŒæ—¶ž®½å¯èƒ½è§„é¿å‰¯ä½œç”¨åQŒè¿™ä»æ˜¯ä¸€ä¸ªå·¨å¤§çš„挑战ã€?/span>


˜q‘æ—¥åQ?/span>西北农林¿U‘技大学王å¾é¾™æ•™æŽ?/span>è¯ùN¢˜¾l?/span>在ã€?/span>ACS Applied Materials & Interfaces》期刊上å‘表了题ä¸?/span>â€?/span>Acid-Induced Self-Catalyzing Platform Based on Dextran-Coated Copper Peroxide Nanoaggregates for Biofilm Treatmentâ€?span style="font-family:宋体;">的文章（DOI: 10.1021/acsami.1c03409åQ‰ã€‚该文章设计äº?/span>åŸÞZºŽè‘¡èš¾p–包覆的˜q‡æ°§åŒ–é“œ¾U³ç±³èšé›†ä½“的酸性诱å¯ÆD‡ªå‚¬åŒ–òq›_°åQ?/span>DCPNAsåQ‰ï¼Œòq‰™¦–‹Æ¡å°†ä¹™é†‡æ²‰æ·€(w¨§n)法è¿ç”¨äºŽåŸÞZºŽå¤šç³–çš„å°¾_’径¾U³ç±³é¢—粒的纯化。此外，è¯ùN¢˜¾l„针对该自催化åã^å°çš„酸性诱导的抗èŒã€æŠ—生物膜性能˜q›è¡Œäº†å…¨é¢è€Œæ·±å…¥çš„研究åQŒåƈž®†å…¶åº”用于金黄色葡è„çƒèŒæ„ŸæŸ“伤å£çš„治疗ã€?br />

Scheme 1. (a) DCPNAs通过酸诱导释æ”?/span>ROS的抗生物膜性能½Cºæ„图；(b) 使用å…ähœ‰ä¼¤å£çš®è‚¤çš„å°é¼ ä½œä¸ºæ„ŸæŸ“伤å£æ¨¡åž‹å¯¹DCPNAs˜q›è¡Œä½“内抗生物膜研究的示æ„图

Figure 1. (a) DCPNAsåˆæˆ½Cºæ„图；(b) 以ä¸åŒçš„OH-ä¸?/span>Cu2 摩尔比åˆæˆçš„DCPNAsçš„ç…§ç‰?/span>

åQ?/span>(A) 0:1åQ?/span>(B) 1:2åQ?/span>(C) 1:1åQ?/span>(D) 2:1åQ?/span>(c) DCPNAsçš?/span>TEM囑փåQ?/span>(d) DCPNAsçš?/span>XRD图谱åQ?/span>(e) DCPNAsçš?/span>XPS全图谱；(f) DCPNAsçš?/span>O 1s XPS高分辨谱åQ?/span>(g) DCPNAsçš?/span>Cu 2p XPS高分辨谱

Figure 2. (a)通过TMB显色‹‚€(g¨¨)‹¹?/span>DCPNAs在ä¸å?/span>pHå€ég¸‹çš„催化性能åQ?/span>(b)采用DCFH‹‚€(g¨¨)‹¹‹ä¸å?/span>pHå€ég¸‹DCPNAsçš?/span>ROS生æˆåQŒæ’图显½C?/span>ROS生æˆçš„百分比åQ?/span>在ä¸å?/span>pHå€?/span>下用ä¸åŒ‹¹“度DCPNAs处ç†çš?/span>(c) 金黄色葡è„çƒèŒå’Œ(d) 沙门æ°èŒçš„细èŒå¯†åº?/span>åQ?/span>(e) 在ä¸å?/span>pHå€ég¸‹¾l过和未¾l过DCPNAs处ç†çš„金黄色葡è„çƒèŒå’Œæ²™é—¨æ°èŒçš„¾l†èŒèŒè½ç”Ÿé•¿å›‘ÖƒåQ?/span>(f) 在ä¸å?/span>pHå€?/span>下绘q‡å’Œæœªç»DCPNAs处ç†çš„金黄色葡è„çƒèŒå’Œæ²™é—¨æ°èŒçš„SEM囑փ

Figure 3. (a) 金黄色葡è„çƒèŒå’Œ (b) 沙门æ°èŒåœ¨ä¸å?pH å€ég¸‹¾l过和未¾l?/span>DCPNAs处ç†çš„生物膜生物é‡?/span> (n = 3, * P < 0.05)åQ?/span>(c) åœ?/span> pH 7.4åQ?/span>I-1 / II-1åQ‰ï¼ŒpH 6.5åQ?/span>I-2 / II-2åQ‰å’Œ pH 5.6åQ?/span>I-3 / II -3åQ‰ä¸‹æœªç»DCPNAs处ç†åQ?/span>I -1-I -3åQ‰å’Œ¾l过DCPNAs处ç†åQ?/span>II -1-II -3åQ‰çš„金黄色葡è„çƒèŒå’Œæ²™é—¨æ°èŒçš„生物膜¾l“晶紫染è‰?/span>图；(d) 在ä¸å?/span>pHå€ég¸‹DCPNAs抑制åŽç”Ÿç‰©è†œçš?/span>3D CLSM囑փåQŒæ‹æ‘„的囑փ区域大å°ä¸?/span>1270 μm × 1270 μmåQ?/span>(e) DCPNAs在完整生物膜中的催化性能åQˆç©ºç™½æ˜¯æœªç»å¤„ç†çš„生物膜åQ‰ã€?/span> (f) åŸÞZºŽMTT‹¹‹å®šçš?/span>DCPNAsç ´å生物膜的作用

Figure 4. DCPNAs在治疗细èŒæ„ŸæŸ“性创é¢ä¸­çš„应用试验结果：(x¨¬)(a) DCPNAs处ç†ä¼¤å£åˆ›é¢½Cºæ„图；(b) å„组伤å£åˆ›é¢å˜åŒ–图；(c) DCPNAs对伤å£è¡¨é¢ç»†èŒçš„抗èŒæ•ˆæžœå›¾ï¼›(d) å„组伤å£é¢ç§¯éšæ—¶é—´å˜åŒ–直方图(* P <0.05)åQ?/span>(e) DCPNA对伤å£è¡¨é¢ç»†èŒçš„抗èŒæ•ˆæžœåQ?/span>(f) æ²È–—9 d时儾l„çš„ž®é¼ ä¼¤å£¾l„织çš?/span>H&E染色切片¾l“æžœ

Figure 5. æ²È–—9 d时儾l„çš„ž®é¼ ä¸»è¦å™¨å®˜çš?/span>H&E染色切片¾l?/span>


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