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Influence of Water Steam on Manual Metal Arc (MMA) Welding Failure Mechanisms of Galvanized Carbon Steel Using Microstructural, Chemical, Mechanical, and Vibration Property Analysis. 水蒸气对镀锌碳钢手工金属电弧(MMA)焊接失效机理的影响:显微组织、化学、力学和振动性能分析
Q2 Environmental Science Pub Date : 2025-10-14 eCollection Date: 2025-01-01 DOI: 10.1155/tswj/6146715
Addisu Negash Ali, Alemkere Bayih Yizengaw, Velmurugan Paramasivam

The primary goal of this research is to use experimental and numerical methods to investigate the effects of water steam on the welded galvanized carbon steel mechanical properties, microstructures, and failure modes. Visual inspection, microstructural analysis, tensile test, free vibration analysis, and chemical composition analysis approaches have been used to investigate the effects of steam water treatment on the welding properties of butt arc-welded joints. From visual observation, the steam heating has significant effects in varying the microstructural arrangements of the welding. Furthermore, the elemental analysis indicates the variations of constituent elements due to the variations of steam treatment days, which affect the mechanical and microstructural properties of the material. The steam heating of the weld to a certain limit indicates the enhancement of elongation up to 20% and the amplitude during the free vibration tests. When the mechanical properties are assessed using a tensile test, the results showed that the welded specimens had up to 425 MPa ultimate tensile strength and the unwelded specimens showed up to 369 MPa ultimate tensile strength. Generally, the steam heating treatment and treatment time have significant effects on the properties of galvanized carbon steel welds. If additional treatment and controlling mechanisms can be implemented, the steam treatment will have a positive impact on the enhancement of the mechanical, corrosion, and other properties of the materials for different engineering applications. The finding of the study is that steam treatment enhanced weld ductility and tensile properties, indicating potential for augmenting weld performance in thermal cycling conditions.

本研究的主要目的是采用实验和数值方法研究水蒸气对焊接镀锌碳钢力学性能、显微组织和失效模式的影响。采用目视检查、显微组织分析、拉伸试验、自由振动分析和化学成分分析等方法研究了蒸汽水处理对对接弧焊接头焊接性能的影响。从目测结果来看,蒸汽加热对焊接组织的变化有显著影响。此外,元素分析表明,由于蒸汽处理天数的变化,组成元素的变化,影响材料的力学和微观组织性能。蒸汽加热到一定限度后,焊缝的伸长率提高了20%,自由振动试验的振幅也有所提高。拉伸试验结果表明,焊接试样的抗拉强度可达425 MPa,未焊接试样的抗拉强度可达369 MPa。一般来说,蒸汽加热处理和处理时间对镀锌碳钢焊缝的性能有显著影响。如果能够实施额外的处理和控制机制,蒸汽处理将对不同工程应用中材料的机械、腐蚀和其他性能的增强产生积极影响。研究发现,蒸汽处理提高了焊缝的延展性和拉伸性能,表明了在热循环条件下提高焊缝性能的潜力。
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引用次数: 0
Immediate Postabortion Family Planning Uptake and Its Associated Factors Among Women Seeking Abortion Services at Health Facilities in East Shewa Zone, Ethiopia: A Multicenter Cross-Sectional Study. 在埃塞俄比亚东谢瓦区医疗机构寻求堕胎服务的妇女中,堕胎后立即计划生育的吸收及其相关因素:一项多中心横断面研究。
Q2 Environmental Science Pub Date : 2025-10-14 eCollection Date: 2025-01-01 DOI: 10.1155/tswj/7915677
Mangistu Abera, Mulugeta Animaw, Abdulaziz Assefa, Ayele Sahile Abdo, Aynalem Belay, Fikremariam Endeshaw, Daniel Tsega, Aberash Beyene Derribow

Background: Immediate postabortion family planning uptake refers to the initiation and use of contraceptive methods immediately after an abortion treatment to prevent subsequent unintended pregnancy. Women should wait at least 6 months after having an abortion before becoming pregnant again, according to WHO recommendations, even if they are eager to have a child immediately. Despite this evidence, many postabortion clients leave healthcare institutions without receiving family planning advice or services. Thus, this study was aimed at assessing the immediate postabortion family planning uptake and associated factors among women seeking abortion services.

Method: An institution-based, multicenter cross-sectional study was conducted among 402 women seeking abortion services in East Shewa Zone healthcare facilities from March 20 to May 25, 2022. A systematic sampling technique was employed to get a representative sample. Data were entered into EpiData Version 4.1 and then exported to Statistical Package for Social Science Version 26 for analysis. Bivariate and multivariable analyses were done to identify variables associated with the level of immediate postabortion family planning uptake in the binary logistic regression model. Statistical significance was declared at p value < 0.05. Finally, tables, graphs, and narration were used to present the findings.

Result: In this study, the overall immediate postabortion contraceptive uptake was 70.1% (95% CI: 65.4, 74.6). Being single (AOR = 4.0; 95% CI: 1.8, 8.0), educational status (AOR = 3.7; 95% CI: 1.4, 9.7), service received at public facility (AOR = 3.0; 95% CI: 1.5, 6.1), previous information about family planning (AOR = 2.1; 95% CI: 1.2, 3.9), previous use of contraceptive method (AOR = 5.4; 95% CI: 2.9, 9.9), and postabortion family planning counseling (AOR = 5.7; 95% CI: 3.1, 10.4) were significantly associated with immediate postabortion family planning uptake.

Conclusion and recommendation: In this study, 29.9% lacked postabortion family planning uptake. Being single, educational status, service received at a public facility, previous information about family planning, previous use of a contraceptive method, and postabortion family planning counseling showed significant associations with immediate postabortion contraceptive uptake. Therefore, it is necessary to establish effective educational awareness and counseling aimed at promoting postabortion modern family planning uptake among the abortion service-seeking women.

背景:流产后立即计划生育是指在流产治疗后立即开始和使用避孕方法,以防止随后的意外怀孕。根据世卫组织的建议,妇女在堕胎后至少应等待6个月才能再次怀孕,即使她们渴望立即生育。尽管有这些证据,许多堕胎后的客户离开保健机构时没有得到计划生育咨询或服务。因此,本研究旨在评估堕胎后立即计划生育的吸收和寻求堕胎服务的妇女的相关因素。方法:对2022年3月20日至5月25日在东舍瓦区医疗机构寻求堕胎服务的402名妇女进行机构性、多中心横断面研究。采用系统抽样技术,获得具有代表性的样本。将数据输入EpiData Version 4.1,然后导出到Statistical Package for Social Science Version 26进行分析。在二元logistic回归模型中,进行了双变量和多变量分析,以确定与流产后立即计划生育水平相关的变量。p值< 0.05,差异有统计学意义。最后,使用表格、图表和叙述来呈现研究结果。结果:在本研究中,流产后立即避孕的总体吸收量为70.1% (95% CI: 65.4, 74.6)。单身(AOR = 4.0; 95% CI: 1.8, 8.0)、教育程度(AOR = 3.7; 95% CI: 1.4, 9.7)、在公共设施接受的服务(AOR = 3.0; 95% CI: 1.5, 6.1)、以前的计划生育信息(AOR = 2.1; 95% CI: 1.2, 3.9)、以前使用避孕方法(AOR = 5.4; 95% CI: 2.9, 9.9)和流产后计划生育咨询(AOR = 5.7; 95% CI: 3.1, 10.4)与流产后立即接受计划生育有显著相关。结论与建议:本研究中29.9%的患者流产后缺乏计划生育。单身、受教育程度、在公共机构接受的服务、以前的计划生育信息、以前使用过避孕方法以及堕胎后的计划生育咨询都与堕胎后立即服用避孕药有显著关联。因此,有必要在寻求堕胎服务的妇女中建立有效的教育意识和咨询,以促进堕胎后现代计划生育的接受。
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引用次数: 0
Correction to "Diversity and Relative Abundance of Avian Species in the Wetland Area Northwest of Lake Abaya, Southern Ethiopia". 对“埃塞俄比亚南部阿巴亚湖西北湿地地区鸟类物种多样性和相对丰度”的修正。
Q2 Environmental Science Pub Date : 2025-10-10 eCollection Date: 2025-01-01 DOI: 10.1155/tswj/9817625

[This corrects the article DOI: 10.1155/2023/9964189.].

[此更正文章DOI: 10.1155/2023/9964189.]。
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引用次数: 0
The Effect of Auricular Massage on Naso-Oral Suctioning Procedural Pain in Premature Neonates: A Randomized Controlled Crossover Study. 耳穴按摩对早产儿鼻口抽吸程序性疼痛的影响:一项随机对照交叉研究。
Q2 Environmental Science Pub Date : 2025-10-07 eCollection Date: 2025-01-01 DOI: 10.1155/tswj/8819743
Reem A Ali, Roa'a F Obeidat, Arwa I Oweis

Background: In the neonatal intensive care unit (NICU), premature neonates frequently endure painful procedures that can lead to long-lasting sequelae, underscoring the critical need for safe and effective pain management strategies. Auricular massage has demonstrated significant benefits for children, including anxiety and stress relief. Investigating its effectiveness in alleviating pain in neonates could introduce a valuable nonpharmacological approach to pain management, enhancing the overall care and comfort of these vulnerable infants.

Objective: This research is aimed at studying the effectiveness of a 3-min session of auricular massage in reducing pain caused by nasal and oral suctioning among premature neonates in the NICU in Jordan.

Methods: A randomized controlled trial employing a single-blind crossover design was conducted in a single hospital. Preterm neonates were randomly assigned to one of two conditions. In Condition I, neonates initially received auricular massage treatment after suctioning, followed, after 2 days, by no massage after suctioning. Conversely, in Condition II, neonates had the reversed sequence, starting with no massage and then receiving auricular massage treatment after 2 days. Pain levels in the neonates were assessed using the Premature Infant Pain Profile-Revised (PIPP-R) scale.

Results: Data from 60 preterm neonates were analyzed using the SPSS Version 28. Chi-square and independent t-tests revealed no significant differences between neonates in the study conditions based on gender (p = 0.43), gestational age (p = 0.41), and body weight (p = 0.35). Paired t-test results indicated a significant difference in pain scores when comparing periods of auricular massage to periods without massage. The mean pain score following auricular massage was 3.63 (SD = 2.36), whereas it was 10.23 (SD = 2.40) in the absence of massage.

Conclusion: Auricular massage for a 3-min duration is an effective nursing intervention that warrants consideration as a nonpharmacological method of pain relief for premature neonates during admission to the NICU.

背景:在新生儿重症监护病房(NICU),早产儿经常忍受痛苦的手术,可能导致长期的后遗症,强调了安全有效的疼痛管理策略的迫切需要。耳穴按摩已经证明对儿童有显著的好处,包括缓解焦虑和压力。研究其在减轻新生儿疼痛方面的有效性,可以为疼痛管理引入一种有价值的非药物方法,提高这些易感婴儿的整体护理和舒适度。目的:本研究旨在研究3分钟耳穴按摩对减轻约旦新生儿重症监护病房早产儿鼻腔和口腔吸痰引起的疼痛的有效性。方法:采用单盲交叉设计,在某医院进行随机对照试验。早产儿被随机分配到两种情况中的一种。条件1:新生儿在吸痰后首先接受耳穴按摩治疗,2天后,不进行吸痰后按摩。相反,在条件II中,新生儿的顺序相反,从不按摩开始,2天后接受耳穴按摩治疗。新生儿的疼痛水平采用修订的早产儿疼痛概况(PIPP-R)量表进行评估。结果:使用SPSS Version 28对60例早产儿数据进行分析。卡方检验和独立t检验显示,在研究条件下,基于性别(p = 0.43)、胎龄(p = 0.41)和体重(p = 0.35)的新生儿之间没有显著差异。配对t检验结果显示,在进行耳穴按摩和不进行耳穴按摩期间,疼痛评分有显著差异。耳穴按摩组的平均疼痛评分为3.63 (SD = 2.36),未按摩组的平均疼痛评分为10.23 (SD = 2.40)。结论:耳穴按摩持续3分钟是一种有效的护理干预,值得考虑作为一种非药物方法来缓解新生儿入住NICU期间的疼痛。
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引用次数: 0
In Vitro Propagation of Eleutherine palmifolia (L.) Merr.: Optimization of Surface Sterilization and Effects of BA and NAA on Shoot and Root Induction. 掌叶绿叶的离体繁殖稳定。:表面杀菌优化及BA和NAA对芽、根诱导的影响。
Q2 Environmental Science Pub Date : 2025-10-06 eCollection Date: 2025-01-01 DOI: 10.1155/tswj/2774274
Jatuporn Hongthongkham, Charinrat Srivarom, Naphat Joomdok, Surachai Rattanasuk

Eleutherine palmifolia (L.) Merr., or Wan Hom Daeng, is a medicinal plant valued for its antioxidant, anti-inflammatory, and antibacterial properties. Its bulbs contain flavonoids, phenolics, and naphthoquinones, but slow natural propagation and low seed viability hinder large-scale cultivation and conservation. This study evaluated the optimal Clorox concentration and exposure time for sterilizing E. palmifolia bulb explants and examined the effects of BA and NAA on in vitro shoot and root development. The results revealed that surface sterilization with 20% Clorox for 20 min yielded the highest explant survival rate at 73.33%. Shoot induction was significantly enhanced in MS medium supplemented with 2 or 4 mg/L BA, or a combination of 2 mg/L BA and 0.5 mg/L NAA, all achieving a 100% shoot formation rate. Root induction was most effective in MS medium containing 0.5 mg/L NAA alone, also with a 100% success rate. These findings establish a reliable and efficient protocol for the in vitro propagation of E. palmifolia, providing a foundation for its conservation, sustainable use, and potential commercial cultivation to meet increasing demand in the medicinal plant sector.

棕榈叶(L.)稳定。它是一种药用植物,具有抗氧化、抗炎和抗菌的特性。其鳞茎含有黄酮类、酚类和萘醌类物质,但自然繁殖缓慢,种子活力低,阻碍了大规模的栽培和保存。本研究评价了高乐氏(Clorox)对棕榈球茎外植体的最佳灭菌浓度和灭菌时间,并考察了BA和NAA对棕榈球茎和根离体发育的影响。结果表明,20%高乐氏表面灭菌20 min,外植体成活率最高,为73.33%。在MS培养基中添加2、4 mg/L BA,以及2 mg/L BA和0.5 mg/L NAA的组合均能显著增强芽诱导,芽形成率均达到100%。在含有0.5 mg/L NAA的MS培养基中生根效果最好,诱导成功率为100%。这些发现为棕榈叶的离体繁殖建立了一个可靠、高效的方案,为其保护、可持续利用和潜在的商业化种植提供了基础,以满足药用植物领域日益增长的需求。
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引用次数: 0
A Mini Review Validating the Therapeutic Potential of Psorospermum febrifugum Spach Extracts in the Treatment of Acne Vulgaris. 补骨乳提取物治疗寻常性痤疮的初步研究。
Q2 Environmental Science Pub Date : 2025-10-02 eCollection Date: 2025-01-01 DOI: 10.1155/tswj/4016492
Simon Peter Kaweesa, Tony Wotoyitide Lukwago, Martin Odoki, Ibrahim Ntulume, Godwin Anywar, Washington Willy Anokbonggo, Bernard Guyah, James Ombaka

Background: This study explored the potential of Psorospermum febrifugum extracts as a promising natural treatment option for acne vulgaris. Previous research suggests that P. febrifugum extracts might hold promise against factors that worsen acne vulgaris. This valuable information is however still scattered across various scientific publications, and this has hindered its accessibility, comprehensive understanding, and easy usage. There is need to review, synthesize, and compile this valuable information into a user-friendly article to enable easy understanding, accessibility, and usability of P. febrifugum bark extract as an option to treat acne vulgaris.

Methods: A comprehensive assessment, synthesis, and compilation of the potential of P. febrifugum for treatment of acne vulgaris were conducted through review of work done across major scientific databases (Cochrane Library, MEDLINE/PubMed, Web of Science, Scopus, and Google Scholar), among studies published in English between April 1980 and April 2022. The search focused on studies that investigated the plant description, traditional medicinal usage, active components of P. febrifugum, its safety profile, and its efficacy against factors contributing to acne vulgaris lesions. The study included in vitro, in vivo, ex vivo, and clinical trials while excluding computer-modeled (in silico) studies.

Results: From an initial 200 search results, 37 full-text articles inclusive of three informative abstracts met the inclusion criteria. The review revealed that P. febrifugum extracts possessed several properties beneficial for acne treatment, including anti-inflammatory response, antibacterial properties, antioxidant activity, antilipase activity, and keratolytic properties (promoting skin cell shedding). Notably, key bioactive compounds such as garcinone E, psorospermin, mangiferin, and betulinic acid exhibit distinct structural features, including prenylation and hydroxylation, that contribute to their ability to inhibit microbial growth, suppress inflammation, regulate lipid metabolism, and all critical pathways in acne pathogenesis. These structural-functional relationships between phytochemicals and acne mechanisms support the pharmacological promise of this plant extract.

Conclusion: The review suggests that P. febrifugum holds significant therapeutic potential against factors that aggravate acne vulgaris severity. The stem bark of P. febrifugum is therefore a promising raw material that could be used to develop topical formulations (gels or creams) for the treatment of acne vulgaris disease.

背景:本研究探讨了补骨乳提取物作为一种治疗寻常性痤疮的天然治疗选择的潜力。先前的研究表明,白藜芦醇提取物可能对恶化寻常痤疮的因素有希望。然而,这些有价值的信息仍然分散在各种科学出版物中,这阻碍了它的可获取性、全面理解和易于使用。有必要回顾,综合,并将这些有价值的信息汇编成一篇用户友好的文章,以使白杨树皮提取物作为治疗寻常痤疮的一种选择易于理解,可及性和可用性。方法:通过回顾1980年4月至2022年4月期间发表的英文研究,对P. febrifugum治疗寻常痤疮的潜力进行全面评估、综合和汇编。这些研究来自主要科学数据库(Cochrane Library、MEDLINE/PubMed、Web of Science、Scopus和谷歌Scholar)。这项研究的重点是研究白藜芦醇的植物描述、传统药用、活性成分、安全性以及对引起寻常痤疮病变的因素的功效。该研究包括体外、体内、离体和临床试验,但不包括计算机模拟(计算机)研究。结果:从最初的200个搜索结果中,37篇全文文章包括3个信息摘要符合纳入标准。综述显示,白藜芦醇提取物具有几种对痤疮治疗有益的特性,包括抗炎反应、抗菌特性、抗氧化活性、抗脂肪酶活性和角质溶解特性(促进皮肤细胞脱落)。值得注意的是,关键的生物活性化合物,如garcinone E, psorospermin, mangiferin和桦木酸表现出不同的结构特征,包括烯酰化和羟基化,这有助于它们抑制微生物生长,抑制炎症,调节脂质代谢,以及痤疮发病的所有关键途径。这些植物化学物质和痤疮机制之间的结构-功能关系支持这种植物提取物的药理前景。结论:本综述提示白藜芦醇对加重寻常性痤疮严重程度的因素具有显著的治疗潜力。因此,白藜芦醇的茎皮是一种很有前途的原料,可用于开发局部配方(凝胶或面霜),用于治疗寻常痤疮疾病。
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引用次数: 0
Do Caregivers Decrease Depression in People With Disabilities? Cross-Sectional Analysis of a Chilean Population-Based Survey. 照顾者能减少残疾人的抑郁吗?智利人口调查的横断面分析。
Q2 Environmental Science Pub Date : 2025-09-30 eCollection Date: 2025-01-01 DOI: 10.1155/tswj/9018645
Claudia Andrea Ramos-Carrillo, Maria Fernanda Torres-Marocho, J Jhonnel Alarco

Objective: Although caregiver assistance is generally assumed to improve the mental health of individuals with disabilities, this relationship has not been evaluated using population-based data. This study was aimed at assessing the association between caregiver assistance and depression among individuals with disabilities in Chile in 2015.

Methods: A cross-sectional secondary data analysis was conducted using data from the 2015 Second National Study on Disability (ENDISC II) in Chile. The primary outcome was depression diagnosed by a physician or health professional. The main exposure variable was caregiver assistance. Additional confounding variables were included in the analysis.

Results: The analysis included data from 2610 individuals with disabilities. In the overall sample, caregiver assistance was not associated with depression. However, stratified analysis by disability severity showed that among individuals with severe disabilities, caregiver assistance was associated with a 27% reduction in the prevalence of depression (PR = 0.73; 95% CI: 0.59-0.89), after adjusting for confounding variables.

Conclusions: Among individuals with severe disabilities in Chile, caregiver assistance appears to reduce the likelihood of depression. Healthcare policies should promote and strengthen both formal and informal caregiving for this vulnerable population.

目的:虽然一般认为照顾者的帮助可以改善残疾人的心理健康,但这种关系尚未使用基于人群的数据进行评估。本研究旨在评估2015年智利残疾人护理人员援助与抑郁之间的关系。方法:利用智利2015年第二次国家残疾研究(ENDISC II)的数据进行横断面二次数据分析。主要结果是由医生或健康专家诊断的抑郁症。主要暴露变量为照顾者协助。分析中还包括了其他混杂变量。结果:分析包括2610名残疾人的数据。在整个样本中,照顾者的帮助与抑郁无关。然而,残疾严重程度的分层分析显示,在调整混杂变量后,在严重残疾的个体中,护理人员的帮助与抑郁症患病率降低27%相关(PR = 0.73; 95% CI: 0.59-0.89)。结论:在智利严重残疾的个体中,护理人员的帮助似乎降低了抑郁的可能性。卫生保健政策应促进和加强对这一弱势群体的正式和非正式护理。
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引用次数: 0
Assessing the Impact of Agricultural Information Utilization on Wheat Productivity of Smallholder Farmers: Evidence From Northwest Ethiopia. 农业信息利用对小农小麦生产力的影响评估:来自埃塞俄比亚西北部的证据。
Q2 Environmental Science Pub Date : 2025-09-30 eCollection Date: 2025-01-01 DOI: 10.1155/tswj/7605699
Zebenay Shitaye, Bamlaku Tadesse, Koyachew Enkuahone

Smallholder farmers in Ethiopia face significant challenges in accessing reliable agricultural information due to limited extension services, inadequate infrastructure, low literacy levels, and restricted access to digital tools. These barriers negatively impact farm productivity. This study investigates the effect of agricultural information utilization on wheat productivity in the East Gojjam Zone of the Amhara Region. Data were collected through a cross-sectional survey of 403 wheat-producing households. To address potential selection bias, a propensity score matching (PSM) model was applied, incorporating variables such as farmer mobility, access to extension services, availability of farm inputs, proximity to markets, and exposure to electronic media. The findings reveal that farmers who accessed and effectively used agricultural information achieved an average wheat yield increase of 19.675% per hectare compared to nonusers. This result underscores the crucial role of information access in improving productivity, particularly when supported by better mobility, strong extension services, reliable input supply, market accessibility, and media connectivity. Based on these insights, the study recommends strengthening the agricultural extension system, improving input supply chains, enhancing rural market infrastructure, expanding access to electronic media, and promoting cooperative-based information dissemination as key strategies to support sustainable agricultural development in Ethiopia.

由于推广服务有限、基础设施不足、识字率低以及获取数字工具受限,埃塞俄比亚小农在获取可靠农业信息方面面临重大挑战。这些障碍对农业生产力产生了负面影响。本研究探讨了农业信息利用对阿姆哈拉地区东戈jam地区小麦生产力的影响。数据是通过对403个小麦种植户的横断面调查收集的。为了解决潜在的选择偏差,应用了倾向得分匹配(PSM)模型,该模型纳入了农民流动性、获得推广服务的机会、农业投入的可用性、接近市场的程度以及接触电子媒体等变量。研究结果显示,与不使用农业信息的农民相比,获取并有效利用农业信息的农民每公顷小麦产量平均提高了19.675%。这一结果强调了信息获取在提高生产力方面的关键作用,特别是在更好的移动性、强大的推广服务、可靠的投入供应、市场可及性和媒体连通性的支持下。基于这些见解,该研究建议将加强农业推广体系、改善投入物供应链、加强农村市场基础设施、扩大电子媒体的获取以及促进以合作社为基础的信息传播作为支持埃塞俄比亚可持续农业发展的关键战略。
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引用次数: 0
New Streptomyces-Derived Antibacterial Compounds Targeting Gram-Positive Bacteria: A Systematic Review. 针对革兰氏阳性菌的新型链霉菌衍生抗菌化合物:系统综述。
Q2 Environmental Science Pub Date : 2025-09-24 eCollection Date: 2025-01-01 DOI: 10.1155/tswj/6659874
Soumia Ait Assou, Mohammed El Hassouni

Bacterial infections, particularly those caused by Gram-positive bacteria like vancomycin-resistant enterococci (VRE) and methicillin-resistant Staphylococcus aureus (MRSA), are a growing concern. This review highlights the potential of the Streptomyces genus in producing novel antibacterial compounds against Gram-positive bacteria. The study was carried out following the guidelines of the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA). To gather relevant literature on novel anti-Gram-positive bacteria compounds produced by Streptomyces, a web search was conducted using several databases, including Scopus, PubMed, ScienceDirect, and Google Scholar, covering the period from January 2013 to mid-2024. The search terms employed in this study included "Streptomyces," "antimicrobial/antibacterial activity," "compounds," and "Gram-positive bacteria." Consequently, a total of 248 Streptomyces-derived compounds were featured across the 96 eligible studies. These compounds include 100 polyketides (58 aromatic polyketides, 30 macrolides, and 12 other polyketides), 72 peptides (67 nonribosomal peptides [52 typical cyclic peptides and 15 lipopeptides] and 5 ribosomal peptides), 23 terpenoids, five polyketides-terpenoids, six alkaloids, 12 phenazines, 11 nucleoside antibiotics, and 19 other compounds belonging to distinct chemical classes. The results emphasize that Streptomyces is an unlimited source of naturally occurring compounds with various structural variations that can occasionally have targeted action against a range of pathogenic Gram-positive bacteria.

细菌感染,特别是由革兰氏阳性细菌如耐万古霉素肠球菌(VRE)和耐甲氧西林金黄色葡萄球菌(MRSA)引起的感染,日益受到关注。本文综述了链霉菌属在生产抗革兰氏阳性细菌的新型抗菌化合物方面的潜力。本研究遵循系统评价和荟萃分析首选报告项目(PRISMA)的指导方针进行。为了收集Streptomyces产生的新型抗革兰氏阳性细菌化合物的相关文献,我们使用Scopus、PubMed、ScienceDirect和谷歌Scholar等多个数据库进行网络检索,检索时间为2013年1月至2024年中期。在这项研究中使用的搜索词包括“链霉菌”,“抗菌/抗菌活性”,“化合物”和“革兰氏阳性细菌”。因此,在96项符合条件的研究中,共有248种链霉菌衍生化合物。这些化合物包括100种聚酮(58种芳香聚酮、30种大环内酯和12种其他聚酮)、72种肽(67种非核糖体肽[52种典型环肽和15种脂肽]和5种核糖体肽)、23种萜类、5种聚酮萜类、6种生物碱、12种非那嗪类、11种核苷类抗生素和19种属于不同化学类别的其他化合物。结果强调链霉菌是一种具有各种结构变化的天然化合物的无限来源,可以偶尔对一系列致病性革兰氏阳性细菌具有靶向作用。
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引用次数: 0
Development of a New Index to Assessing the Safety Culture Based on the Edgar Schein Model (Audit Approach). 基于Edgar Schein模型(审计方法)的安全文化评价新指标的建立。
Q2 Environmental Science Pub Date : 2025-09-24 eCollection Date: 2025-01-01 DOI: 10.1155/tswj/3166187
Davood Eskandari, Abbas Haghparast Ghomesheh, Mousa Jabbari, Abdollah Gholami, Omran Ahmadi

Introduction: Over the past few decades, particularly following the Chernobyl incident, awareness of the importance of safety culture has increased significantly. Traditionally, safety culture has been assessed using questionnaires, with results often influenced by employees' psychological states. Therefore, the present study evaluates safety culture through an audit-based approach, employing performance indicators grounded in Edgar Schein's model. Materials and Methods: To identify the key factors contributing to the safety culture index, Edgar Schein's model was applied. Relevant indicators were derived across three levels: artifacts, espoused values, and basic assumptions. The fuzzy analytic hierarchy process (FAHP), combined with expert evaluations, was used to determine the relative importance of these criteria. Finally, the company's safety culture index was quantitatively assessed using guide tables and the weighted contribution of each factor. Results: Then, 10 indicators were identified across the three levels of Schein's model: quality of documentation and procedures, employee involvement, management of professional competence, change management, organizational learning, openness and communication, prioritization of safety, managerial knowledge, safety perspectives, and attitudes toward mistakes. According to the FAHP results, prioritization of safety had the highest weight (0.157), while quality of documentation and procedures had the lowest weight (0.026) in the safety culture index. Discussion: An audit-based approach proves more effective than questionnaire methods for quantitatively assessing safety culture.

导言:在过去的几十年里,特别是在切尔诺贝利事件之后,人们对安全文化重要性的认识显著提高。传统上,安全文化是通过问卷来评估的,结果往往受到员工心理状态的影响。因此,本研究通过基于审计的方法评估安全文化,采用基于埃德加·沙因模型的绩效指标。材料与方法:采用Edgar Schein模型确定影响安全文化指数的关键因素。相关的指标是在三个层次上得出的:人工制品、拥护的价值和基本假设。运用模糊层次分析法(FAHP),结合专家评价,确定各指标的相对重要性。最后,利用指导表和各因素的权重贡献对公司的安全文化指数进行定量评价。结果:在Schein模型的三个层次上,确定了10个指标:文件和程序质量、员工参与、专业能力管理、变革管理、组织学习、开放和沟通、安全优先级、管理知识、安全观点和对错误的态度。根据FAHP结果,安全优先级在安全文化指数中权重最高(0.157),而文件和程序质量的权重最低(0.026)。讨论:在定量评估安全文化方面,基于审计的方法被证明比问卷调查方法更有效。
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