Production and Characterization of a Composite Based on Plaster and Juncus Maritimus Plant Fibers

Nowadays,materials with a limited impact on the environment are required in the construction sector.Considering the interesting properties of natural elements such as natural fibers,it seems advantageous to use them to reinforce materials while protecting the environment and guaranteeing economic gain.Along these lines,this research was devoted to studying the effect of untreated natural fibers extracted from the Juncus maritimus plant(from Southern Morocco)on plaster.First,the effect of the percentage of added fibers on the fluidity of the plaster was evaluated by means of the Marsh’s cone method,that is,by measuring the time taken by a known volume of plaster to flow from a cone through a short tube.Then,the highly porous microstructure of the plaster was observed using a scanning electron microscope(SEM).The diffractogram of Juncus maritimus fibers was built by means of a X-ray diffraction(XRD)method.The values obtained for the wet thermal conductivity of the composites decreased from 0.4853 W/m.K for the reference specimen to 0.4324 W/m K for a fiber volume content of 40%.The densities were calculated to determine the lightness of each composite.The mechanical strengths[flexural and compressive]were evaluated for different percentages of rush fibers.The addition of 20%volume fiber was found to improve the flexural strength to 3.63 MPa compared to the sample without fiber(3.36 MPa),thereby ensuring good toughness of the considered material.Nevertheless,a reduction in compressive strength was observed,due to the poor adhesion between the fibers and the plaster matrix.

Study on the effect of Shixiang plaster on the expression of CD31,serum FN,and VEGF in a rat model with chronic wounds

Background:Chronic wounds pose a significant surgical challenge,often requiring traditional treatments with limited efficacy.This study explores the promising impact of Shixiang plaster,a classic Chinese ointment,on wound healing.We investigated the cluster of differentiation 31(CD31)expression,serum fibronectin(FN),and vascular endothelial growth factor(VEGF)levels in SPF rats with induced wounds to elucidate the mechanism behind Shixiang plaster’s effectiveness.We investigated the effect and explored the role of Shixiang plaster on the expression of CD31,serum FN,and VEGF in chronic wounds.Methods:The study involved 36 SPF rats divided into model,rb-bFGF,and Shixiang plaster groups.Penicillin was injected into the rats before modelling for 3 days to prevent infection.The skin was excised 2 cm below the horizontal line of the inferior border of the shoulder bone in the middle of the rat column up to the deep fascial layer and inoculated with a certain concentration of Staphylococcus aureus;the wound was covered aseptically for 3 days.The trauma area of the rats was observed at 3,7,and 14 days,respectively.Histopathology was observed using haematoxylin eosin and Masson staining.CD31 expression was detected using immunohistochemistry staining.FN and VEGF expression was detected using serum ELISA.Statistical analyses were carried out by the method of SPSS.Results:Regarding wound morphology,at 3 days,the recovery area of the Shixiang plaster group was larger than that of the other two groups,at 7 days,the wound healing rate of the Shixiang plaster group was significantly higher,and at 14 days,the wounds of the Shixiang plaster group had been mostly healed,with a healing rate of 98.3%.Haematoxylin eosin staining revealed a large amount of granulation tissue at 3 days in the Shixiang plaster group,and the epidermal scales disappeared at 14 days,with thinner epidermal thickness at 1 lesion and a large reduction in inflammatory cell infiltration.Masson staining showed that at 3,7,and 14 days,blue staining was the most abundant and deeper in the Shixiang plaster group,with richer collagen and a compact tissue matrix.Immunohistochemical testing showed strong positive expression of CD31 in the Shixiang plaster group,with abundant neovascularisation and large official lumens extending towards the surface of the wound.Statistically significant elevated expression of FN at 7 and 14 days was determined by ELISA in the Shixiang plaster group,and VEGF expression was significantly increased at 7 days,but expression had been expressed at a low level at 14 days.Conclusion:Shixiang plaster exhibits remarkable efficacy in healing chronic wounds.The proposed mechanism involves FN’s promotion of angiogenesis and cell proliferation,VEGF’s impact on angiogenesis and inflammation,and CD31’s regulatory role in inhibiting inflammation while promoting angiogenesis.

Thermal Performance Analysis of Plaster Reinforced with Raffia Vinifera Particles for Use as Insulating Materials in Building

The present study focuses on the formulation of new composite consisting of plaster and raffia vinifera particle (RVP) with the purpose to reducing energy consumption. The aim of this study is to test this new compound as an insulating eco-material in building in a tropical climate. The composites samples were developed by mixing plaster with raffia vinifera particles (RVP) using three different sizes (1.6 mm, 2.5 mm and 4 mm). The effects of four different RVP incorporations rates (i.e., 0wt%, 5wt%;10wt%;15wt%) on physical, thermal, mechanicals properties of the composites were investigated. In addition, the use of the raffia vinifera particles and plaster based composite material as building envelopes thermal insulation material is studied by the habitable cell thermal behavior instrumentation. The results indicate that the incorporation of raffia vinifera particle leads to improve the new composite physical, mechanical and thermal properties. And the parametric analysis reveals that the sampling rate and the size of raffia vinifera particles are the most decisive factor to impact these properties, and to decreases in the thermal conductivity which leads to an improvement to the thermal resistance and energy savings. The best improvement of plaster composite was obtained at the raffia vinifera particles size between 2.5 and 4.0 mm loading of 5wt% (C95P5R) with a good ratio of thermo-physical-mechanical properties. Additionally, the habitable cell experimental thermal behavior, with the new raffia vinifera particles and plaster-based composite as thermal insulating material for building walls, gives an average damping of 4°C and 5.8°C in the insulated house interior environment respectively for cold and hot cases compared to the outside environment and the uninsulated house interior environment. The current study highlights that this mixture gives the new composite thermal insulation properties applicable in the eco-construction of habitats in tropical environments.

Investigation of the Fermentation Mode of Rice Husk for the Stabilization of Earth Plaster

Despite its low resistance to humidity, adobe remains the most widely used material for housing construction, particularly in developing countries. The present study aims to assess different modes of use of fermented RH and to evaluate their influence on the behavior of raw earth for application in plaster. The influences of two types of RH are evaluated: granular rice husk (RHg) and powdered RH (RHp). The clay mainly consists of clay (40%), silt (22%), and sand (38.4%), with a small proportion of gravel (0.24%). Its liquidity limit is 40% and the plasticity index is 26.5%. The mixtures were designed using earth and each of the two rice husks at the volumetric content of 10%, 15% and 20% of the total volume mixed with water 36.5%, 38.5% and 40.3% and fermented for three weeks. Each fermented mixture was added to the soil to form the paste, and 40 × 40 × 160 mm3 test speciments were made for characterization. The results generally show an improvement in the physico-mechanical properties and water resistance of the mortars containing fermented RH, with an optimal content between 10% and 15%. The powdered RH improved the performance of the mortar better than granular RH.

Yinqiao Sanhuang Paste Combined with Traditional Chinese Medicine Plaster for the Intervention of Drug Rash Induced by Targeted Therapy in Lung Cancer

Objective:To observe the efficacy and safety of Yinqiao Sanhuang Paste combined with traditional Chinese medicine plaster in treating drug rash caused by targeted therapy in lung cancer.Methods:A total of 100 lung cancer patients treated at our hospital from January 2021 to December 2023 were selected and randomly divided into an observation group and a control group,with 50 patients in each group.The control group received conventional medication,while the observation group was treated with Yinqiao Sanhuang Paste combined with traditional Chinese medicine plaster.The clinical symptom improvement and adverse reactions in both groups were observed.Results:The effective rate in the control group was 80.00%,while in the observation group,it was 96.00%,with a statistically significant difference between the two groups(P<0.05).The onset time,duration,and significant effect time in the control group were(2.41±0.29)days,(4.42±1.21)days,and(5.45±0.29)days,respectively;in the observation group,they were(2.44±0.21)days,(4.28±1.11)days,and(5.57±1.01)days,respectively.There was no statistically significant difference in the total onset time and total duration between the two groups(P>0.05).The incidence of adverse reactions in the control group was 28.00%,higher than the observation group’s 10.00%(P<0.05).Conclusion:Yinqiao Sanhuang Paste combined with traditional Chinese medicine plaster can effectively reduce the symptoms of drug rash induced by targeted therapy in lung cancer and lower the incidence of adverse reactions,indicating good clinical application value.

Effect of Head Meridian Massage Combined with Auricular Acupoint Plaster on Patients with Insomnia

Objective:To study the effect of head meridian massage combined with auricular acupoint plasters on patients with insomnia.Methods:The sample consisted of 50 cases,and all of them were admitted to Yixing Hospital of Traditional Chinese Medicine from January 2022 to December 2023.The patients were divided into an observation group and a control group,with 25 cases in each group.The observation group was treated with a combination of head meridian massage and auricular acupoint plaster while the control group underwent conventional nursing care.The improvement of sleep quality and nursing effect were used as evaluation criteria to compare the clinical effects of the nursing programs.Results:After nursing intervention,the Pittsburgh sleep quality index(PSQI)score of the observation group,which was 7.17±1.41 points was lower than that of the control group(9.04±1.96 points),(t=3.8724,P<0.05).The total efficacy was 96.00%for the observation group and 76.00%for the control group(2=4.1528,P<0.05).Conclusion:Head meridian massage combined with auricular acupoint can improve the sleep quality of patients with insomnia.

高河矿E1306上分层工作面膏体充填开采技术研究与应用

针对“三下”资源开采问题,以高河矿E1306工作面为研究对象,根据工作面工程地质条件和充填技术现状,分别对工作面巷道布置及支护特征、充填采煤工艺与隔离流程、膏体材料选择及充填工艺流程、速凝剂添加系统以及工作面顶板管理进行了详细的参数设计,并在充填作业结束后对回采巷道进行矿压监测分析,结果表明:顶底板移进量小于800mm,顶板相对稳定,矿山压力显现不显著,完成了工作面的安全与高效开采,为类似膏体充填开采提供借鉴。

Plackett-Burman联用Box-Behnken响应面法优选伤痛凝胶贴膏基质处方的研究

目的优选伤痛凝胶贴膏基质处方的配比。方法在单因素试验基础上,采用Plackett-Burman联用Box-Behnken响应面法,以感官评价、初黏力、持黏力作为伤痛凝胶贴膏的综合评价指标,优选伤痛凝胶贴膏基质处方。结果优选的伤痛凝胶贴膏基质处方为NP-7002.82 g,甘羟铝0.15 g,甘油11.02 g,PVPK902.50 g,高岭土0.50 g,酒石酸0.14 g。结论优选的伤痛凝胶贴膏有很好的黏性和成型性,顺应性好,便于临床推广使用。

高层住宅快穿插体系下爬架和铝合金模板的施工研究

研究介绍了平阳县C–01–04地块高层住宅项目总承包工程在快穿插体系下的爬架和铝模的施工应用。为了加快项目的施工速度,缩短施工周期,提升工效,项目采用爬架和铝合金模板协同施工,通过外立面爬架与施工电梯的配合,保证主体结构施工期间同步插入外墙抹灰施工,栏杆、门窗安装及涂料第一遍腻子施工。通过铝合金模板在一次结构施工中的深化,减少二次结构措施投入,优于传统施工工序的安排,节约施工周期,极大地降低施工成本,故其具有较大的推广价值。

观察中药硬膏热贴敷联合塞来昔布治疗腰椎间盘突出症的临床疗效

目的探究中药硬膏热贴敷联合塞来昔布治疗腰椎间盘突出症的临床疗效。方法选取腰椎间盘突出症患者120例,随机分为观察组和对照组,每组60例。观察组采用中药硬膏热贴敷联合塞来昔布治疗,对照组采用塞来昔布治疗。对比两组治疗效果、视觉模拟评分法(VAS)评分、Oswestry功能障碍指数(ODI)评分、日本骨科协会评估治疗分数(JOA)评分、腰椎活动度、住院时间以及生活质量。结果治疗后,观察组VAS、ODI、JOA评分分别为(3.25±0.21)、(12.36±1.18)、(25.25±2.44)分,对照组分别为(4.55±1.89)、(17.52±1.09)、(20.21±2.06)分。治疗后,两组VAS、ODI、JOA评分均优于本组治疗前,且与对照组对比,观察组VAS、ODI评分更低、JOA评分更高(P<0.05)。观察组治疗总有效率98.33%高于对照组的83.33%(P<0.05)。治疗后,两组腰椎活动度均大于本组治疗前,且观察组前屈、后伸、侧屈的活动度分别为(61.63±3.25)、(18.52±1.77)、(19.96±1.82)°,均大于对照组的(52.52±2.88)、(14.25±1.05)、(16.52±1.03)°(P<0.05)。观察组住院时间为6~8 d,平均(7.02±1.03)d;对照组住院时间为8~12 d,平均(10.32±1.99)d。观察组住院时间短于对照组(t=11.408,P=0.000<0.05)。治疗后,观察组生理功能、生理职能、活力、社会功能、一般健康状况、情感职能、精神健康、总体健康评分分别为(36.21±2.24)、(36.86±2.64)、(35.97±2.74)、(36.12±2.14)、(36.21±2.53)、(35.58±1.98)、(36.66±2.05)、(42.27±2.32)分,对照组分别为(28.12±1.35)、(29.10±2.31)、(29.10±1.33)、(28.86±1.62)、(29.11±1.10)、(27.67±1.22)、(28.87±1.55)、(33.33±1.99)分。治疗后,两组生理功能、生理职能、活力、社会功能、一般健康状况、情感职能、精神健康、总体健康评分均高于本组治疗前,且观察组均高于对照组(P<0.05)。结论中药硬膏热贴敷联合塞来昔布治疗腰椎间盘突出症效果显著,不仅能改善患者腰椎功能,减轻疼痛,还能缩短患者的住院时间,值得推广。

三棱针耳尖放血联合涌泉穴贴敷对早期麦粒肿患者的临床效果评价

目的:探讨三棱针耳尖放血联合涌泉穴贴敷治疗早期麦粒肿的临床效果。方法:选取2021年10月—2023年10月在宜兴市中医医院眼科收治的96例早期麦粒肿患者为研究对象。根据随机数字表法分为三棱针组、贴敷组以及联合组,每组32例。三棱针组采用三棱针耳尖放血治疗,贴敷组采用涌泉穴贴敷治疗,联合组则同时采用两种治疗方法。对比3组患者治疗前后的临床疗效、疼痛程度、麦粒肿面积及直径、首发非接触泪膜破裂时间和平均泪膜破裂时间、炎症标志物、不良反应发生率以及复发率。结果:治疗前,3组患者各项指标差异均无统计学意义(P>0.05)。治疗后联合组的总有效率为96.88%(31/32),三棱针组为78.13%(25/32),贴敷组为75.00%(24/32),联合组总有效率高于三棱针组和贴敷组(P<0.05)。治疗后3 d和7 d,3组患者的VAS评分均低于治疗前(P<0.05),且联合组的评分明显低于三棱针组和贴敷组(P<0.05)。联合组的麦粒肿面积、直径低于三棱针组和贴敷组(P<0.05),首发非接触泪膜破裂时间和平均泪膜破裂时间高于三棱针组和贴敷组(P<0.05)。在炎症标志物方面,联合组CRP和WBC水平低于三棱针组和贴敷组(P<0.05)。3组患者不良事件发生率及复发率比较差异无统计学意义(P>0.05)。结论:三棱针耳尖放血联合涌泉穴贴敷治疗早期麦粒肿显示出良好的临床疗效,能有效降低疼痛程度和炎症标志物水平,对早期麦粒肿的治疗具有明显优势,在临床上具有较大的应用前景。

Properties of fiber reinforced plaster molds for investment casting

In order to improve the performance of plaster molds for investment casting,a diverse content of glass fiber and polypropylene(PP)fiber was incorporated into the slurry for the preparation of a fiber-reinforced mold.The green and fired bending strengths,thermal expansion properties,permeability,and thermal shock resistance of the mold were examined,and the scanning electron microscope(SEM)with energy dispersive spectrometer(EDS)was applied for the observation of fracture morphology.With appropriate content,the introduction of glass fiber was proved to increase the green bending strength and fired bending strength,restrain the thermal expansion and improve the thermal shock resistance of the mold,while the polypropylene fiber added was able to raise the green bending strength and the permeability,reduce the thermal expansion and heighten the thermal shock resistance as well,though the fired bending strength would be weakened slightly.Evenly distributed fibers were capable of enhancing the mechanical properties of the matrix,but agglomerations and bundles of fibers resulting from excessive addition had a negative impact.Meanwhile,it was also manifested that micropores left by ablative polypropylene fibers could improve the permeability and reduce the thermal expansion of the mold,and the fired bending strength would be decreased slightly by the deterioration of continuous structure.Three different ratios of hybrid fiber were employed in plaster molds,which can meet altered requirement of castings.The samples modified with hybrid fiber possessed lower thermal deformation,higher air permeability,and better resistance of thermal shock,while the mechanical strength was equal to the fiber free sample or slightly increased.

Preparation of Novel Composite from Natural Rubber, Bagasse and Plaster

The sugar cane bagasse was treated with chemical treatment including sodium hydroxide and silane. The characterization of the modified bagasse was achieved with Fourier transform infrared spectroscopy （FTIR）, and scaning electron microscopy （SEM）. Results showed that the presence Si-CH3 group occurred on bagasse surface after chemical modification. In addition, the roughness of the modified bagasse was higher than that of unmodified bagasse due to chemical modification from sodium hydroxide. Two polymer composite types, namely （1） natural rubber NR/sugar cane bagasse and （2） NR/plaster via two-roll mill method, were prepared. The optimum cure （t90） and torque of the NR/plaster increased with increasing plaster loading in composite. In case of NR/bagasse, the tgo of this sample decreased as a function of sugar cane bagasse while torque of this sample increased with increasing sugar cane bagasse. The modulus of the resulting composite increased with increasing both plaster and sugar cane bagasse, but the tensile strength and elongation at break of the composite decreased as a function of both piaster and sugar cane bagasse in composite.

INSOMNIA TREATED WITH AURICULAR-PLASTER THERAPY IN 218 CASES

218 cases of insomnia were treated by auricular plaster therapy with seeds of Vaccaria segetalis. The auricular points Heart, Shenmen, Occiput and Brain were selected. The resultsshowed that 136 cases were cured, 76 markedly impr0ved and 6 no effect. The effect of this therapywas significantly better than that of medication (P【0. 01) in comparison with the application of western medicine.

The Influence of Two Natural Reinforcement Fibers on the Hygrothermal Properties of Earthen Plasters in Mogao Grottoes of China

Murals in Mogao Grottoes consist of three parts:support layer,earthen plasters and paint layer.The earthen plasters play a key role in the preservation of murals.It is a mixture of Dengban soil,sand,and plant fiber.Two different natural fibers,hemp fiber and cotton fiber,were reinforced to earthen plasters in the same percentage to evaluate the influence on hygrothermal performance.The two types of earthen plasters were studied:one containing hemp fiber in the fine plaster(HFP)and the other containing cotton fiber in the fine plaster(CFP).Specific heat capacity,dry thermal conductivity,water vapor permeability,and sorption isotherms were investigated.The results showed that the difference between two natural fibers has much more impact on the hygric properties(water vapor permeability and sorption isotherms)of earthen plasters than on their thermal performance(specific heat capacity and dry thermal conductivity).The CFP with higher density has higher thermal conductivity than the HFP with lower density.But no significant differences of specific heat capacity were observed.Compared with HFP,CFP used in murals can reduce the rate of water transfer and prevent salt from transferring water to the mural surface.The overall findings highlight that all these features of CFP are beneficial to the long-term preservation of murals.The study of the earthen plasters in Mogao Grottoes is of general significance,and the measured properties can be used to obtain coupled heat and moisture analysis of the earthen plasters and to dissect the degradation mechanism of murals.

Study and application of plasticity plaster-slurry for preventing coal spontaneous combustion

Introduced the modulation scheme, function and mechanism of plasticity plaster slurry preventing coal spontaneous combustion. The applications show that the plasticity plaster slurry has good hygroscopicity and adsorptivity. To spray it on the coal wall of tunnel can shut off leakage wind fast and effectively. To press it into the coal body can absorb the heat and descend the temperature, surround the coal pieces, eliminate the possibility of the fiery district resuming combustion.

Clinical study on the treatment of bronchiectasis in remission period by embedding thread combined with Jianpi Qushi Huayu plaster

Objective:To explore the clinical effect of embedding thread combined with Jianpi Qushi Huayu ointment in the treatment of bronchiectasis in remission period,and to observe the effect on the level of inflammatory cytokines.Methods:150 patients with bronchiectasis in remission period were divided into three groups(50 cases in each group),western medicine group(treated with salmeterol fluticasone and low dose erythromycin),combined group(treated with Jianpi Qushi Huayu plaster),observation group(treated with western medicine+Jianpi Qushi Huayu plaster+embedding thread),and the clinical treatment of the three groups were compared.Result:before and after treatment,the improvement of TCM syndrome score,the improvement of pulmonary ventilation index,the improvement of inflammatory cytokines,and the change of adverse reactions.Results:the treatment efficiency of the observation group and the combination group was significantly higher than that of the western medicine group P The peak level of expiratory flow velocity,the maximum expiratory flow,the forced expiratory volume in one second and the ratio of forced expiratory volume in one second to vital capacity in the observation group and the combined group were significantly better than those in the western medicine group and the pre-treatment level(P<0.05),and the improvement in the observation group was better than that in the combined group After treatment,the expression of IL-13,IL-10 and IL-4 in the combined group was significantly better than that in the western medicine group and before treatment(P<0.05),and the improvement in the observation group was better than that in the combined group;there was no significant difference in the incidence of adverse reactions among the three groups(P>0.05).Conclusion:catgut embedding combined with Jianpi Qushi Huayu ointment can significantly alleviate the related clinical symptoms and signs,effectively control the further aggravation of the disease,improve the lung function of patients,regulate the level of inflammatory cytokines to reduce the degree of inflammatory reaction,and do not significantly aggravate the adverse reactions of drugs.

OBSERVATION ON THE THERAPEUTIC EFFECT OF COMBINED AURICULAR-PLASTER AND MOXIBUSTION THERAPIES FOR TREATMENT OF 500 CASES OF DYSFUNCTIONAL UTERINE BLEEDING

The present study reports results of 500 cases of dysfunctional uterine bleeding treatedwith combined auricular-plaster and moxibustion therapies. After treatment, 480 cases were cured,constituting 96. 0 %; 16 cases were improved, constituting 3. 2% and 4 had no any effect, constituting 0. 8 %. The total effective rate was 99. 2 %.

CLINICAL APPLICATION OF AURICULAR-PLASTER THERAPY IN THE TREATMENT OF GASTROPTOSIS

In the present study, 100 patients suffering from gastroptosis were randomly dividedinto auricular-plaster group and acupuncture group. The effective rates of the two groups were bothabove 90% and no statistically significant difference in the rates was found between these groups (P】0. 05). It indicates that auricular-plaster and acupuncture, though they are different from each otherin methodology, are both effective in the treatment of gastroptosis.