Janus hydrogel/electrospun-membrane dressing enhancing wound healing in rats

Background:Excessive exudate secreted from chronic wounds often leads to overhydration and infection.Although a variety of dressings are currently available in clinical applications,they frequently fail to provide multifunction to promote chronic wound healing.The dressings with a Janus structure,featuring distinct properties on each side,are potential to improve wound healing.Methods:Composite dressings with a Janus structure were fabricated,comprising freeze-dried polycaprolactone(PCL)electrospun membrane and alginate-based hydrogel.The PCL fibrous membrane provided air permeability,while the hydrogel loaded with Deferoxamine,composed of alginate and poly(N-isopropylacrylamide)(PNIPAM),exhibited hygroscopic properties.The inclusion of PNIPAM imparted thermo-responsivity.Results:The hydrogel(thickness of 2.778±0.082 mm)exhibited a robust adhesion to the fiber membrane(thickness of 0.261±0.041 mm).For ANDC(Alginate-PNIPAM hydrogel with Deferoxamine/PCL membrane)samples,the water vapor transmission rate(WVTR)was measured to be 3364.80±23.23 g∙m−2∙day−1 and the swelling ratio at 2 h was determined to be 1179±125%.The thermo-responsivity of ANDC samples manifested in an increased swelling rate,escalating from 797±189%at 37°C to 1132±147%at 4°C.The elastic modulus was assessed for lyophilized and rehydrated ANDC sample.When theωof the rheometer rotor was decreased from 10 rad/s to 0.1 rad/s,the lyophilized dressing exhibited a decrease from 2.65±0.01 MPa to 1.80±0.90 MPa,while the rehydrated dressing demonstrated an increase from 133.65±55.68 Pa to 264.23±141.71 Pa.The pro-healing properties of the dressings were evaluated using full-thickness skin defect model on SD rats,and a circular wound of diameter 10 mm healed completely by day 12.Conclusion:The dressings not only protected the wound and absorbed excess exudate,but also demonstrated nondestructive peelability upon cooling,providing a novel approach for accelerating wound healing and management.

Antibacterial and angiogenic dual-functional fibrous membrane dressing for infected wound healing

Background:Skin,being a vital organ that regulates physiological responses in the human body,is prone to injury from external environmental factors.Healing full-thickness skin defects becomes especially challenging when infections and vascular injuries are involved.Traditional wound dressings with single functions,such as antibacterial or angiogenic properties,fall short in achieving rapid wound healing.To address this,there is a need to develop wound dressing materials that possess both effective antibacterial and angiogenic properties.Methods:In this study,we utilized electrospinning technology to fabricate hyaluronic acid-cellulose acetate fibrous membrane dressings,incorporating poly(ionic liquid)as an antibacterial polymer and deferoxamine as an angiogenic agent.Results:The resulting fibrous membrane dressing contained poly(ionic liquid)and deferoxamin showcased a microporous structure,drug-releasing capabilities,and excellent air permeability.It not only demonstrated highly effective antibacterial properties but also exhibited remarkable angiogenesis,thereby promoting the healing of full-thickness skin defect wounds in both in vitro and in vivo assays.Conclusion:These findings highlight the immense potential of this wound dressing material for future clinical applications.

以DRESS综合征就诊的血管免疫母细胞性T细胞淋巴瘤一例

血管免疫母细胞性T细胞淋巴瘤(angioimmunoblastic T-cell lymphoma, AITL)是外周T细胞淋巴瘤(peripheral T cell lymphoma, PTCL)的亚型之一,占所有非霍奇金淋巴瘤(non-Hodgkin lymphoma, NHL)病例的1%~2%。某些情况下,该疾病与DRESS综合征难以鉴别,在本文中,我们报道皮损表现似DRESS综合征的老年女性AITL患者一例。

树突状细胞经cross-dressing递呈抗原在肿瘤免疫中的应用

cross-dressing是树突状细胞(DC)区别于交叉递呈和直接递呈的第三种抗原递呈方式,其优势在于DC捕获细胞抗原肽-MHCⅠ类分子复合物后,无须经过加工处理而直接递呈给效应T细胞。近十年来,cross-dressing在肿瘤免疫领域的研究取得了一些成果,学者们利用小鼠和人源性细胞模型证实cross-dressing存在于不同肿瘤抗原识别和免疫应答过程,初步阐明了cross-dressing的具体途径和DC分子表型,并研究了cross-dressing与交叉递呈的关系。本文就上述问题进行了综述。

四环素类药物致DRESS综合征的文献分析

目的分析四环素类药物致伴嗜酸性粒细胞增多和系统症状的药疹综合征(DRESS综合征)的发生情况及特点,为临床安全合理用药提供参考。方法通过检索中国知网(CNKI)、万方(WanFang)、维普(VIP)、PubMed、The Cochrane Library、Embase等数据库,查找自建库至2022年11月30日期间四环素类药物导致DRESS综合征的文献,筛选出符合标准的病例进行统计和分析。结果共收集到有效文献29篇,涉及患者32例,男性9例(28.13%),女性23例(71.87%);30岁以下20例;原发疾病主要为痤疮(19例);致敏药物29例为米诺环素(90.63%),3例为多西环素(9.37%);四环素类药物致DRESS综合征的潜伏期均值为(27.35±13.76)d,24例患者在用药14 d之后出现不良反应;临床症状主要表现为皮疹、发热、面部水肿、淋巴结肿大、嗜酸性粒细胞增高及内脏受累,最常见受累的器官为肝脏(23例),其次是心脏(12例)。32例患者中21例在予以皮质内固醇等药物治疗后好转;1例好转后复发,1例好转后皮质内固醇戒断失败;6例患者死亡,其中4例死于DRESS综合征导致的心脏受累,2例死于多器官衰竭;3例患者治愈后出现自身免疫性后遗症,其中2例同时出现甲状腺功能障碍和1型糖尿病,1例出现1型糖尿病。结论四环素类药物致DRESS综合征的病死率较高,尤其是米诺环素诱发的心脏受累对患者危害极大,临床上应加强用药监测,此外DRESS综合征引发的自身免疫性疾病也需要引起关注。

Design of Novel Wound Dressing Composed of Collagen and Hyaluronic Acid Containing Epidermal Growth Factor

This research aims to develop a wound dressing composed of collagen (Col) and hyaluronic acid (HA) containing epidermal growth factor (EGF). First important issue is to contain EGF in the wound dressing in a stable state. The sheet-shaped sponge was manufactured by freeze-vacuum drying an aqueous solution of Col. Both sides of sponge were treated with ultraviolet (UV) irradiation to introduce intermolecular cross links between collagen molecules. This sponge was named Sponge-Col. Another sheet-shaped sponge was manufactured by freeze-vacuum drying an aqueous solution of HA containing EGF. This sponge was named Sponge-HA/EGF. The wound dressing was manufactured by laminating Sponge-Col on the top, Sponge-HA/EGF in the middle, and Sponge-Col on the bottom to create a sandwich structure. This method can prevent the reducing of EGF activity due to UV irradiation for intermolecular cross-linking. Second important issue is to enable gradual release of EGF from the wound dressing. The elution behavior of this wound dressing was investigated by measuring the weight change after immersion in water for a predetermined time. This wound dressing showed initially fast elution and subsequent very slow elution properties. The upper layer and lower layer Sponge-Col enabled gradual release of the middle layer Sponge-HA/EGF. This result suggests that EGF contained in the wound dressing is gradually released together with HA from the wound dressing. Third important issue is to provide moist wound-healing environment. The upper layer and lower layer Sponge-Col can provide the wound dressing with high water absorption and long-term water retention properties.

超真实与内爆:拟像理论下DRESS X虚拟时尚平台的虚实关系探析

近年来,元宇宙概念的兴起带动了DRESSX虚拟时尚平台的发展,DRESSX虚拟时尚平台现已成为世界上最大的数字化服装零售平台。基于让·鲍德里亚的拟像理论,以DRESSX虚拟时尚平台为研究对象,从虚拟服装物质性消失、虚拟场景突破现实枷锁、虚拟化身仿真现实人三个维度映射超真实的现实世界。网络技术的全面渗透促使整个虚拟时尚平台发生内爆,以意义的内爆、媒介的内爆、社会的内爆三个方面消解虚实边界。最后,DRESS X虚拟时尚平台作为新兴平台,目前存在法律不健全、用户非理性消费等问题。

Is it possible to get fruits and dresses from a plant?

Would you eat a vitamin-rich black strawberry from a plant that has also produced your little black dress?The research comes from a project that Carole Collet,a professor of the Textile Futures Research Centre at Central Saint Martins College in London,has been working on Biolace,a research that connects textiles,food production and sustainability since years.Her research targets the year 2050 and beyond.By anticipating future key socio-economic factors and technological timelines,she aims at impacting today’s design directions so as to enable a more resilient and sustainable future.

Problem-Based Learning(PBL)Teaching Design in Enhancing College Students’Innovation Ability:Taking the Traditional Dress Design Course as An Example

This paper combines the cultivation of innovation ability with the content of problem-based learning(PBL),analyzes the current situation of the traditional dress design course,discusses the problems existing in the cultivation of innovation ability of college and university traditional dress design,and searches for the strategies to improve students’innovation ability based on PBL.This paper argues that PBL can provide assistance to the teaching design of traditional dress design courses,which is conducive to improving students’innovation ability in traditional dress design and realizing the desired teaching effect.

Curative Effect of 30% Supramolecular Salicylic Acid Combined with Yufa Spray Dressing on Moderate to Severe Scalp Seborrheic Dermatitis

Objective:To observe the clinical efficacy of 30%supramolecular salicylic acid combined with Yufa spray dressing in the treatment of moderate to severe seborrheic dermatitis(seborrheic dermatitis of the scalp,SDS).Methods:From January 2020 to December 2021,150 patients with SDS,who were treated in the Dermatology Clinic of the First Affiliated Hospital of Xi’an Medical University,were randomly divided into two groups,a treatment group and a control group,with 75 cases in each group.The treatment group was given 30%supramolecular salicylic acid combined with Yufa spray dressing on the basis of external medicine given to the control group,while the control group was given oral medicine combined with external medicine.Results:The difference in scores of erythema,scales,pruritus,and folliculitis of the treatment group before and after treatment was significant(P<0.01),indicating that supramolecular salicylic acid combined with Yufa spray dressing can relieve the symptoms of SDS.The difference in scores of erythema of the control group before and after treatment was significant as well(P<0.05),indicating that traditional antibiotics are also effective in treating SDS;however,there was no significant difference(P>0.05)in the scores of other signs and symptoms,such as scales,pruritus,and folliculitis,before and after treatment,indicating that traditional antibiotics have no obvious curative effect on SDS.After 12 weeks of treatment,the improvement in erythema,scaling,and folliculitis was significantly greater in the treatment group compared with the control group(P<0.05).Curative effect comparison showed that the total effective rate of the treatment group was 80.00%,compared with 25.67%of the control group,and the difference was statistically significant(P<0.05).Conclusion:30%supramolecular salicylic acid combined with Yufa spray dressing can significantly improve the therapeutic effect in moderate to severe SDS;the recurrence rate is lower,the course of treatment is shorted,and patients generally feel better;thus,it is a new option for the treatment of dermatitis.

70%噻虫嗪种子处理可分散粉剂拌种对大麦蚜虫的防治效果及增产作用

为了探索防治大麦蚜虫的科学有效措施,选用保山市大面积推广的二棱品种“保啤麦28号”,每10 kg种子分别用20、30、40 g 70%噻虫嗪种子处理可分散粉剂拌种防治蚜虫。结果表明:不同用量的70%噻虫嗪种子处理可分散粉剂拌种能有效抑制蚜虫对大麦的危害。大麦拔节期前,防效均达100%;大麦孕穗期至抽穗扬花期,防效为72.30%~95.70%;大麦灌浆期,防效为33.60%~80.04%;大麦乳熟期,防效为14.20%~49.44%,防效随着用量的增加而增加,且持效期更长;每10 kg种子用药30、40 g防效最佳,与每10 kg种子用30 mL的30%噻虫嗪悬浮种衣剂拌种防效相近。药剂拌种对大麦还具有增产作用,增产率为8.6%~16.9%。建议在大麦生产中,根据当地蚜虫发生规律选择不同用量、不同剂型的杀虫剂拌种防治大麦蚜虫,综合考虑防效、成本和用量,达到节本、增效的目的。

凡士林纱卷铆钉样缝合加压包扎对腋臭术后并发症发生率的影响研究

目的:研究凡士林纱卷铆钉样缝合加压包扎对腋臭术后并发症发生率的影响。方法:将入选的101例患者按就诊顺序编号,随机分为两组,均采用微小切口大汗腺修剪术治疗。治疗组61例,采用凡士林纱卷铆钉样缝合加压包扎,对照组40例,采用“8”字绷带包扎。结果:治疗组皮下血肿、皮肤坏死、切口愈合延迟、瘢痕的发生率(分别为0.82%、0.82%、1.64%、2.46%)低于对照组(分别为12.5%、7.5%、8.75%、10%),差异有统计学意义(均P<0.05);治疗组、对照组术口感染发生率分别为1.64%、2.50%,差异无统计学意义(P>0.05)。治疗组满意度为93.44%,高于对照组的62.50%(P<0.05)。结论:与“8”字绷带包扎相比,凡士林纱卷铆钉样缝合加压包扎可以一定程度上降低腋臭术后并发症发生率,满意度更高,值得临床推广应用。

湿包疗法在成人中重度特应性皮炎及其他皮炎湿疹类皮肤病中的疗效观察

目的观察湿包疗法(WWT)在特应性皮炎及其他皮炎湿疹类皮肤病中的疗效及安全性。方法回顾分析2015年1月—2023年5月在首都医科大学附属北京友谊医院皮肤科住院期间应用WWT治疗的特应性皮炎(AD)及其他皮炎湿疹类皮肤病患者,总结WWT的疗效及不良反应。结果共收集44例患者,病种包括AD、红皮病、嗜酸性粒细胞增多性皮炎、湿疹、AD结节痒疹型、光敏性皮炎以及药疹。治疗后患者湿疹面积及严重程度指数(EASI)、研究者总体评估(IGA)、体表受累面积(BSA)、瘙痒-数字评价量表(NRS)均得到显著改善,外周血嗜酸性粒细胞水平较前下降。AD结节痒疹型组WWT应用时间显著高于AD、红皮病和湿疹组。应用0.05%卤米松乳膏进行WWT组的EASI评分下降率显著高于0.1%糠酸莫米松乳膏组和青鹏软膏组。应用0.05%卤米松乳膏进行WWT组患者治疗后IGA评分显著低于青鹏软膏组。结论WWT治疗成人中重度AD及皮炎湿疹类疾病的疗效肯定,安全性好。

煤电化基地大宗固废“三化”协同利用基础与技术

我国14个大型煤炭基地及89个大宗固体废弃物综合利用示范基地建设,标志着矿区大宗固废利用已被纳入全国战略发展布局。长期以来煤炭资源高强度的开发与利用,造成矿区浅埋煤层资源临近枯竭,煤电化基地大规模固废堆积及地表沉陷,已成为制约矿区绿色低碳、高质量发展的难题。大宗煤基固废协同利用与绿色充填是解放“三下一上”压煤,延长矿井服务年限,实现固废无害化、资源化、规模化“三化”利用的有效途径。基于产煤大省山西省、“华东能源粮仓”安徽两淮基地及宁东能源化工基地的煤基固废种类和产量,详细阐述了以煤矸石、粉煤灰、炉底渣、气化渣和脱硫石膏等为主要材料的煤基固废通过重金属吸附解吸和络合钝化技术实现无害化处置,列举煤基固废分类应用于低热值煤基固废发电、制备建筑材料如水泥、砖瓦等资源化利用途径,对比分析煤基固废采煤沉陷区复垦回填及井下充填规模化利用途径,突出煤基固废井下充填的优越性。基于煤电化基地深部煤炭资源,提出绿色充填开采理论与关键技术,包括深部煤矸石源头减量与采选充协同技术、充填材料高效制备与深部井下输送技术及煤基固废充填材料深部多场耦合机理,探究多源煤基固废从源头、过程到终端的深部充填开采全过程的技术原理与方法,以解决矿区深部井下充填的技术难题。根据宁东基地任家庄煤矿、山西省霍尔辛赫煤矿及淮北矿区地质条件和充填目的,分别提出超前钻孔注充低位充填方案、关键层非典型特征条件下多离层梯级注浆方案和煤基固废协同利用关键技术,综合矿山固废处置与利用、深部煤炭资源开发利用、地表沉陷控制、生态环境保护等优势,形成煤电化基地大宗固废协同利用与绿色开采模式,为煤炭开采高质量化和环境低损伤化提供参考。

《朝元图》人物服饰图案在现代女包设计中的创新应用

《朝元图》是六百多年前的壁画作品,是中国绘画史上的旷世之作。文章从壁画中的人物服饰图案切入,深入挖掘服饰图案的文化内涵与艺术价值。从现代设计学角度分析服饰图案的历史背景、艺术特征和传承价值,并详细阐述服饰图案的提取方法。在服饰图案的创新设计过程中,结合当代审美意识,将带有创新基因的服饰图案成功应用到现代皮革女包的设计中。文章深入剖析了现代女包设计中的实践环节,将产生的设计方案与设计思路进行分析与汇总,以期为现代设计师们提供可借鉴的应用经验。

潍坊风筝元素在现代女礼服设计中的应用

从保护国家级非物质文化遗产的角度出发,基于对潍坊地区非物质文化的实地调研,选取潍坊风筝作为切入点,将其元素应用于现代女礼服设计中。以现代简约女礼服为载体,在面料上采用手绘工艺绘制沙燕、荷叶、蜻蜓等图案;使用硬纱和风筝原材料竹子缠绕制作立体梅花、荷花、牡丹等花卉造型,将其缝制于服装局部作为部分装饰;将竹条按服装造型制作成型,作为服装局部造型,如袖子、裙撑、蝴蝶结等,使得礼服造型既融合传统文化又符合现代美感。将潍坊风筝元素应用到女礼服设计中,使服装设计实现多样化,同时助推潍坊风筝制作工艺的传承与发展,对推动潍坊市文化和经济的发展具有重大意义。

红光治疗仪联合藻酸盐敷料对下肢骨折术后创面愈合的疗效

目的:探讨红光治疗仪联合藻酸盐敷料对下肢骨折术后创面愈合效果。方法:选取80例下肢骨折患者,分为观察组与对照组,比较两组治疗前后FN与EGF水平差异。结果:观察组在术后14d、21d、28d的骨痂密度评分均高于对照组(P<0.05)。观察组术后2d、4d、6d疼痛评分均低于对照组(P<0.05)。治疗后,两组血清FN和EGF水平均高于治疗前,且观察组血清FN和EGF水平高于对照组(P<0.05)。结论:红光治疗仪联合藻酸盐敷料用于下肢骨折术后创面愈合,安全有效,能够促进骨痂生长,减轻患者疼痛程度,改善血清FN与EGF水平。

“菊苓方”纱布敷料对妊娠合并贫血患者剖宫产术后切口愈合疗效研究

目的观察“菊苓方”纱布敷料对妊娠合并贫血患者剖宫产术后切口愈合的影响。方法将172例妊娠合并贫血的剖宫产患者随机分为治疗组和对照组,每组86人。治疗组选用“菊苓方”纱布敷料为患者腹部切口换药,对照组选用无菌纱布敷料换药。记录患者术后第3天切口局部(颜色、肿胀、灼热、疼痛)的评分,切口愈合等级,切口愈合不良发生率等,对比两组的疗效。结果治疗组患者在术后第3天腹部切口愈合的情况中,在切口肿胀、切口颜色、切口疼痛缓解等方面明显优于对照组,差异均有统计学意义(均P<0.05);治疗组切口愈合不良发生率小于对照组(1.16%vs 9.30%)。结论“菊苓方”纱布敷料明显提高妊娠合并贫血患者剖宫产术后切口愈合质量,同时提高切口愈合率,提升患者生活质量,达到整体快速康复的目的。

试论两种相互矛盾的海昏侯刘贺形象及其成因

在历史文献记载中的“汉废帝”刘贺是一种粗犷少文、劣迹斑斑的纨绔子弟形象,然而,随着海昏侯墓的挖掘,大量出土资料所呈现的刘贺却是一种受过系统儒家文化教育、行事低调的宗室贵胄形象。造成这两种相互矛盾的形象出现的原因,在于刘贺特殊的政治身份及其深陷斗争漩涡无力回旋的历史事实。为了达到废黜和排除潜在威胁的目的,权臣霍光及汉宣帝存在刻意抹黑、夸大其罪的可能,加上受政治宣传的影响,历史文献的叙事者进一步固化或加强了这一形象。

近代中原民间女婚服实证分析与CLO3D数字化复原

以开发中原民间服饰文物的数字化资源为目的,通过文献与传世实物互证的方法,梳理近代传统女婚服的类型特征、艺术价值与民俗文化内涵,展现农耕文明下的中原婚俗文化。在实证分析的基础上,选择典型服饰样本,运用CLO3D软件绘制衣片样板、材质纹样,进行样衣试穿,完成数字化虚拟复原。实践表明:借助数字化虚拟技术可完整、有效地实现女婚服文物的数字化资源开发,与现实服装文物复原、展示相比更具时效、节能、全面的优势。