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By-Products of the Babassu Agribusiness for Ruminant Diets. 用于反刍动物饲料的巴巴苏农业企业副产品。
IF 2.3 Q2 BIOLOGY Pub Date : 2024-08-05 eCollection Date: 2024-01-01 DOI: 10.1155/2024/5363940
Ygor Nascimento Portela, Danrley Martins Bandeira, Daniele de Jesus Ferreira, Henrique Nunes Parente, Michelle de Oliveira Maia Parente, Ivo Alexandre Leme da Cunha, Glayciane Costa Gois, Fleming Sena Campos, Francisca Claudia da Silva de Sousa, Luana Milena Pinheiro Rodrigues, Jessica Maria de Sousa Oliveira, Anderson de Moura Zanine

The use of babassu agro-industrial residues in animal feed, in addition to being an economic option of great importance in reducing the environmental impact in regions of the Brazilian Cerrado, provides the production of good quality foods of animal origin due to its nutritional characteristics. However, information related to the nutritional components of babassu by-industrial residues has not yet been sufficiently explored. The aim of this study was to evaluate the nutritional potential of some by-products from the babassu production chain through chemical composition and in situ degradability analyses. The experiment was conducted in a completely randomized experimental design, with 4 by-products from babassu processing (cake, greasy, fine flour, and 95 µm flour) and 5 replications. The by-products differ in terms of chemical composition, except for the hemicellulose content. For the degradability of fraction "a" of dry matter, it presented a higher percentage for 95 µm flour. Fine flour and 95 µm flour presented the highest fractions "b" and "c," potential, and effective degradability of dry matter. For the degradation of crude protein, the highest percentages of potential and effective degradability were observed for greasy and 95 µm flour. The highest standardized potentially degradable fraction and the highest passage rate were obtained by 95 µm flour, which also showed greater degradation for dry matter, crude protein, and neutral detergent fiber. Among the by-products studied, the babassu cake has superior chemical composition; however, the 95 µm flour presented nutritional value and satisfactory rumen degradation to be used as an additive or in partial replacement of traditional concentrates.

在动物饲料中使用巴巴苏农用工业残留物,除了对减少巴西塞拉多地区的环境影响具有重要的经济意义外,还能利用其营养特性生产优质的动物源食品。然而,有关工业残留物巴巴苏营养成分的信息尚未得到充分探索。本研究旨在通过化学成分和原位降解性分析,评估巴巴苏生产链中一些副产品的营养潜力。实验采用完全随机的实验设计,共有 4 种巴巴苏加工副产品(饼、油脂、细粉和 95 微米粉)和 5 次重复。除半纤维素含量外,这些副产品的化学成分各不相同。就干物质 "a "部分的降解率而言,95 微米面粉的降解率较高。细面粉和 95 微米面粉的干物质 "b "和 "c "部分、潜在降解能力和有效降解能力最高。在粗蛋白降解方面,油脂面粉和 95 微米面粉的潜在降解率和有效降解率最高。95 微米面粉的标准化潜在降解率和通过率最高,干物质、粗蛋白和中性洗涤纤维的降解率也较高。在所研究的副产品中,巴巴苏饼的化学成分更优越;但 95 微米面粉的营养价值和瘤胃降解效果令人满意,可用作添加剂或部分替代传统浓缩物。
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引用次数: 0
Spatial Distribution and Pollution Assessment of Metals in Sediments of the Babon River, Central Java, Indonesia. 印度尼西亚中爪哇巴布河沉积物中金属的空间分布与污染评估。
IF 2.3 Q2 BIOLOGY Pub Date : 2024-07-29 eCollection Date: 2024-01-01 DOI: 10.1155/2024/2065513
Haeruddin Haeruddin, Agoes Soegianto, Frida Purwanti, Arif Rahman, Carolyn Melissa Payus, Hefni Effendi

Background: The Babon River is one of the drainage channels in Semarang, Indonesia, that is used for drinking water, irrigated agriculture of paddy fields and gardens, fish farming media, and the disposal of industrial wastewater. This study aimed to assess the spatial distribution of metals in the sediment of the Babon River through the utilization of different pollution indices. These indices included concentration factor (Cf), contamination factor (CF), enrichment factor (EF), geoaccumulation index (Igeo), sediment pollution index (SPI), threshold effect level (TEL), and probable effect level (PEL).

Methods: Seven sampling locations were sampled for water and sediment in April, June, and September of 2021. The measurement of the metal was conducted using an atomic absorption spectrophotometer.

Results: The findings of the study demonstrated that sediments with a predominant sand texture exhibited higher levels of Cd and Pb, while the sediments characterized by a predominant clay texture had a higher concentration of Cr. Upon analyzing the Cf, CF, EF, Igeo, and SPI data, it has been confirmed that the sediment in the Babon River has substantial levels of Cd, Cr, and Pb. According to the TEL and PEL values, it can be observed that the presence of Cd and Pb has detrimental effects on the biological health of the benthic biota.

Conclusions: The aquatic biota and the benthic environment may be subject to adverse effects in the event where the concentration of metals in the sediment is higher than the natural concentration of metals.

背景:巴本河是印度尼西亚三宝垄市的排水渠道之一,用于饮用水、稻田和花园的农业灌溉、养鱼媒介以及工业废水的处理。本研究旨在利用不同的污染指数评估巴蓬河沉积物中金属的空间分布。这些指数包括浓度因子 (Cf)、污染因子 (CF)、富集因子 (EF)、地质累积指数 (Igeo)、沉积物污染指数 (SPI)、阈值效应水平 (TEL) 和可能效应水平 (PEL):2021 年 4 月、6 月和 9 月,在七个采样点对水和沉积物进行了采样。使用原子吸收分光光度计对金属进行测量:研究结果表明,以砂质为主的沉积物中镉和铅的含量较高,而以粘土质为主的沉积物中铬的含量较高。通过分析 Cf、CF、EF、Igeo 和 SPI 数据,可以确认巴蓬河的沉积物中含有大量镉、铬和铅。根据 TEL 和 PEL 值,可以看出镉和铅的存在对底栖生物群的生物健康有不利影响:结论:当沉积物中的金属浓度高于自然浓度时,水生生物群和底栖环境可能会受到不利影响。
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引用次数: 0
Clinical-Microbiological Study of Nontyphoidal Salmonella Infections from Karnataka, India. 印度卡纳塔克邦非伤寒沙门氏菌感染的临床微生物学研究
IF 2.3 Q2 BIOLOGY Pub Date : 2024-07-16 eCollection Date: 2024-01-01 DOI: 10.1155/2024/6620871
Biranthabail Dhanashree, Shalini Shenoy

Background: Nontyphoidal salmonella (NTS) are responsible for food-borne gastroenteritis and bacteremia, in immunosuppressed individuals. Antibiotic resistance in NTS is on the rise. This study reports the prevalence and antimicrobial susceptibility of nontyphoidal salmonella in clinical samples. Study Design. This is a hospital record-based cross-sectional, retrospective study.

Methods: In our study, inpatient samples such as blood (n = 13546), urine (n = 11,333), pus (n = 1,010), and stool (n = 926) samples were cultured to isolate etiological agents in the microbiology department from January 2017 to June 2019. Relevant details such as duration of fever, platelet count, hemoglobin, WBC count, immune status, and mode of treatment were noted from the medical records. Data were analyzed, and continuous variables were expressed as mean and categorical variables as percentages.

Results: A total of 24 NTS serovars were isolated, which included ten isolates from blood, five each from urine and pus, and four from stool samples. Of the NTS, five were Salmonella enterica subsp. enterica, three were S.enterica serovar Typhimurium, one was S.enterica subsp. diarizonae, and 15 S.enterica serovars could not be serologically differentiated. All were susceptible to ampicillin, chloramphenicol, and cefuroxime. However, 16.6% of NTS was resistant to ceftriaxone, 4% to cotrimoxazole, 58% to ciprofloxacin, and 75% to nalidixic acid.

Conclusions: A low prevalence of NTS responsible for invasive infections is seen in this part of the country. Few isolates were resistant to more than one antibiotic. A higher rate of resistance to ceftriaxone is the cause of concern. Awareness of the distribution of NTS serogroups is of epidemiological and public health significance.

背景:非伤寒沙门氏菌(NTS)是造成免疫抑制人群食源性胃肠炎和菌血症的罪魁祸首。NTS 的抗生素耐药性呈上升趋势。本研究报告了临床样本中非伤寒沙门氏菌的流行率和抗菌药敏感性。研究设计。这是一项基于医院病历的横断面回顾性研究:在我们的研究中,2017 年 1 月至 2019 年 6 月期间,微生物科对住院病人的血液(n = 13546)、尿液(n = 11333)、脓液(n = 1010)和粪便(n = 926)等样本进行了培养,以分离病原体。病历中记录了发热持续时间、血小板计数、血红蛋白、白细胞计数、免疫状态和治疗方式等相关细节。对数据进行分析,连续变量以平均值表示,分类变量以百分比表示:结果:共分离出 24 个 NTS 血清菌株,其中 10 个来自血液,5 个来自尿液和脓液,4 个来自粪便样本。在这些 NTS 中,5 个是肠炎沙门氏菌亚种,3 个是伤寒沙门氏菌血清,1 个是肠炎沙门氏菌亚种,15 个肠炎沙门氏菌血清无法从血清学上区分。所有细菌都对氨苄西林、氯霉素和头孢呋辛敏感。然而,16.6%的NTS对头孢曲松耐药,4%对复方新诺明耐药,58%对环丙沙星耐药,75%对纳利昔酸耐药:结论:该国这一地区导致侵袭性感染的 NTS 感染率较低。很少有分离菌株对一种以上的抗生素产生耐药性。令人担忧的是,头孢曲松的耐药率较高。了解 NTS 血清群的分布具有流行病学和公共卫生方面的重要意义。
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引用次数: 0
Economic Valuation of Ecosystem Services and Its Association with Socioeconomic Factors in the Wof-Washa Natural State Forest, North Shewa Zone, Ethiopia. 埃塞俄比亚北谢瓦区 Wof-Washa 天然国家森林生态系统服务的经济估值及其与社会经济因素的关联。
IF 2.3 Q2 BIOLOGY Pub Date : 2024-07-16 eCollection Date: 2024-01-01 DOI: 10.1155/2024/6607551
Abere Wondimu Kassie, Admasu Moges, Tilahun Alelign, Gojam Bayeh

The Wof-Washa Natural State Forest (WWNSF) in Ethiopia harbors remarkable biodiversity but faces threats from local communities, climate change, and a lack of awareness regarding its preservation. Although numerous studies exist, the economic value of the forest's ecosystem services (FESs) has been largely overlooked. Thus, the purposes of this study were to identify FESs, estimate their total economic value, and assess challenges with possible strategies for sustainable forest management. The research employed Google Earth to estimate forest area and socioeconomic surveys with field visits to gather data from 368 participants for analyzing the FESs, monetary values, and challenges with possible strategies. Analyses included descriptive statistics, total economic valuation (TEV), and an ordinary least squares regression model. The study revealed that the WWNSF provides crucial provisioning services (timber, honey, water, and firewood), regulating services (soil erosion control and climate change mitigation), and supporting services (soil formation and nutrient cycling). The forest's annual contribution to sampled households averaged $1152.30, with regulating and cultural services valued at $14,112 and $622.00, respectively. The study also revealed that male-headed households, larger families, and those having limited farmland and off-farm income depended more heavily on the forest. Therefore, farmland scarcity, settlements, and tree harvesting for firewood, timber, and agricultural tools, as well as the lack of employment opportunities, were the main challenges encountered in the study area. This suggests that despite degradation and reduction in size due to human pressures, the WWNSF remains a significant source of socioeconomic and ecological benefits, supporting local livelihoods and biodiversity. To ensure the forest's restoration, prioritizing community participation, promoting family planning, providing alternative income opportunities especially for youth, and balancing resource use with conservation efforts are possible strategies that should be taken into account.

埃塞俄比亚的沃夫-瓦沙天然国营森林(WWNSF)蕴藏着丰富的生物多样性,但却面临着来自当地社区、气候变化以及缺乏保护意识的威胁。虽然已有大量研究,但森林生态系统服务 (FES) 的经济价值在很大程度上被忽视了。因此,本研究的目的是识别森林生态系统服务,估算其总经济价值,并评估可持续森林管理战略所面临的挑战。研究利用谷歌地球估算森林面积,并通过实地考察进行社会经济调查,从 368 名参与者那里收集数据,用于分析森林生态系统服务、货币价值以及可能的战略所面临的挑战。分析包括描述性统计、总经济价值 (TEV) 和普通最小二乘法回归模型。研究表明,世界自然保护联盟森林提供了重要的供给服务(木材、蜂蜜、水和木柴)、调节服务(控制土壤侵蚀和减缓气候变化)和支持服务(土壤形成和养分循环)。森林对抽样家庭的年平均贡献为 1152.30 美元,调节服务和文化服务的价值分别为 14 112 美元和 622.00 美元。研究还显示,男户主家庭、大家庭、农田和非农业收入有限的家庭对森林的依赖程度更高。因此,农田稀缺、定居点、为获取木柴、木材和农具而砍伐树木以及缺乏就业机会是研究地区面临的主要挑战。这表明,尽管由于人类的压力导致森林退化和面积缩小,但世界自然保护联盟森林仍然是社会经济和生态效益的重要来源,支持着当地的生计和生物多样性。为确保森林的恢复,优先考虑社区参与、促进计划生育、提供替代收入机会(尤其是为年轻人)以及平衡资源利用与保护工作是应考虑的可行战略。
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引用次数: 0
Gut Microbiota and Metabolic Syndrome: Relationships and Opportunities for New Therapeutic Strategies. 肠道微生物群与代谢综合征:肠道微生物群与代谢综合征:关系与新治疗策略的机遇》。
IF 2.3 Q2 BIOLOGY Pub Date : 2024-07-15 eCollection Date: 2024-01-01 DOI: 10.1155/2024/4222083
Emmanuel Henry Ezenabor, Aishat Abimbola Adeyemi, Oluyomi Stephen Adeyemi

Since its discovery, numerous studies have shown the role of the microbiota in well-being and disease. The gut microbiota represents an essential factor that plays a multidirectional role that affects not just the gut but also other parts of the body, including the brain, endocrine system, humoral system, immune system, and metabolic pathways, as well as host-microbiome interactions. Through a comprehensive analysis of existing literature using the desktop research methodology, this review elucidates the mechanisms by which gut microbiota dysbiosis contributes to metabolic dysfunction, including obesity, dyslipidaemia, hypertension, atherosclerosis, hyperuricemia, and hyperglycaemia. Furthermore, it examines the bidirectional communication pathways between gut microbiota and host metabolism, highlighting the role of microbial-derived metabolites, immune modulation, and gut barrier integrity in shaping metabolic homeostasis. Importantly, the review identifies promising therapeutic strategies targeting the gut microbiota as potential interventions for metabolic syndrome, including probiotics, prebiotics, symbiotics, dietary modifications, and faecal microbiota transplantation. By delineating the bidirectional interactions between gut microbiota and metabolic syndrome, the review not only advances our understanding of disease pathophysiology but also underscores the potential for innovative microbiota-based interventions to mitigate the global burden of metabolic syndrome and its associated complications.

自微生物群被发现以来,大量研究表明了微生物群在健康和疾病中的作用。肠道微生物群是一个重要因素,它发挥着多向作用,不仅影响肠道,还影响身体的其他部分,包括大脑、内分泌系统、体液系统、免疫系统和代谢途径,以及宿主与微生物群之间的相互作用。通过使用桌面研究方法对现有文献进行全面分析,本综述阐明了肠道微生物群失调导致代谢功能障碍的机制,包括肥胖、血脂异常、高血压、动脉粥样硬化、高尿酸血症和高血糖。此外,该研究还探讨了肠道微生物群与宿主代谢之间的双向交流途径,强调了微生物衍生代谢物、免疫调节和肠道屏障完整性在形成代谢稳态中的作用。重要的是,该综述确定了针对肠道微生物群的有前途的治疗策略,作为代谢综合征的潜在干预措施,包括益生菌、益生元、共生菌、饮食调节和粪便微生物群移植。通过描述肠道微生物群与代谢综合征之间的双向相互作用,这篇综述不仅增进了我们对疾病病理生理学的了解,还强调了基于微生物群的创新干预措施在减轻代谢综合征及其相关并发症的全球负担方面的潜力。
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引用次数: 0
The Effectiveness of a Mobile Learning Environment in Improving Psychological Security in Blind Students. 移动学习环境在提高盲人学生心理安全方面的效果。
IF 2.3 Q2 BIOLOGY Pub Date : 2024-07-08 eCollection Date: 2024-01-01 DOI: 10.1155/2024/7629607
Amr El Koshiry, Entesar Eliwa, Tarek Abd El-Hafeez, Mohamed Abd Allah Tony

This study aimed to investigate the impact of the Edmodo mobile learning environment on promoting psychological security among university students with visual impairments, at both the undergraduate and postgraduate levels. The researchers employed a combination of descriptive and quasiexperimental methodologies. The primary study sample consisted of 20 visually impaired students from Beni Suef University, divided equally between an experimental group (10 students) and a control group (10 students). To achieve the research objectives, the Psychological Security Scale was utilized and the experimental group received an intervention involving the implementation of a mobile learning environment using Edmodo. The data analysis revealed a statistically significant difference between the experimental and control groups in the postassessment, with the experimental group demonstrating an elevated sense of psychological security. Furthermore, the experimental group showed significant improvements in the pre- and postassessments, favoring the latter, with a standard score of 3.781. No significant differences were observed between the postassessment and the follow-up evaluation of the experimental group, with a standard score of 0.471, indicating the continuous effectiveness of the Edmodo mobile learning environment in enhancing the psychological security of visually impaired university students. This efficacy was sustained even one month after the student's graduation, as evidenced by the follow-up assessment.

本研究旨在调查 Edmodo 移动学习环境对促进视障大学生(本科生和研究生)心理安全的影响。研究人员采用了描述性和准实验相结合的方法。主要研究样本包括贝尼苏伊夫大学的 20 名视障学生,平均分为实验组(10 名)和对照组(10 名)。为了实现研究目标,实验组使用了心理安全量表,并接受了使用 Edmodo 移动学习环境的干预。数据分析显示,实验组和对照组在后评估中的差异具有统计学意义,实验组的心理安全感有所提升。此外,实验组在前后测评中均有明显改善,标准分 3.781 分的实验组更胜一筹。实验组的后评估和跟踪评估之间没有发现明显差异,标准分为 0.471,这表明 Edmodo 移动学习环境在增强视障大学生心理安全感方面持续有效。这种效果甚至在学生毕业一个月后仍能持续,这一点在后续评估中也得到了证明。
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引用次数: 0
Comprehensive Assessment of the Genotype-Environment Interaction and Yield Stability of Boro Rice Genotypes under Four Environments in Bangladesh Using AMMI Analysis. 利用 AMMI 分析法全面评估孟加拉国四种环境下波罗水稻基因型与环境的相互作用及产量稳定性
IF 2.3 Q2 BIOLOGY Pub Date : 2024-07-04 eCollection Date: 2024-01-01 DOI: 10.1155/2024/7800747
Shams Shaila Islam, Md Borhan Uddin Sarker, Md Masud Rana, Ahmed Khairul Hasan, Md Rashed Karim, Thanet Khomphet

Yield stability, alongside high yield potential and broad adaptation to various agroclimatic environments, is a key objective for rice breeders aiming to ensure food security. This study aimed to explore the most suitable and stable Boro rice genotypes for Bangladesh. Ten Boro rice genotypes underwent testing in four environments during the 2022 Boro season to investigate genotype-environment interaction (GEI) and yield stability performance. The experiment utilized three replications of a completely randomized block design. Yield stability performance was assessed through combined analysis and the additive main effects and multiplicative interaction (AMMI) model. The combined ANOVA revealed that the environment explained 10.23%, while GEI accounted for 9.17%, and the genotypes captured 80.60% of the variance, significantly impacting grain yield. Significance was observed in the environment, genotype main effects, and GEI. Analysis indicated that BRRI dhan 68 yielded the highest (6,754 kg·ha-1) and BRRI dhan 88 the lowest (5,620 kg·ha-1) among the investigated genotypes. In addition, genotypes BRRI dhan 84, BRRI dhan 81, and BRRI dhan 67 exhibited the highest grain yields. The Rangpur environment demonstrated considerable stability across the four environments with a high mean value of grain yield (7,206 kg·ha-1). Therefore, the AMMI model emerges as a valuable tool for identifying the most suitable and stable Boro rice genotypes with high-yielding potential across various regions in Bangladesh, as well as under diverse conditions.

产量稳定性、高产潜力和对各种农业气候环境的广泛适应性是旨在确保粮食安全的水稻育种人员的主要目标。本研究旨在探索最适合孟加拉国的、稳定的博罗水稻基因型。在 2022 年的波罗季节,十个波罗水稻基因型在四种环境中进行了测试,以研究基因型与环境的相互作用(GEI)和产量稳定性能。试验采用完全随机区组设计的三次重复。产量稳定性通过综合分析和加性主效应和乘性交互作用(AMMI)模型进行评估。综合方差分析显示,环境解释了 10.23%的方差,GEI 占 9.17%,基因型占 80.60%,对谷物产量有显著影响。环境、基因型主效应和 GEI 都具有显著性。分析表明,在调查的基因型中,BRRI dhan 68 产量最高(6 754 kg-ha-1),BRRI dhan 88 产量最低(5 620 kg-ha-1)。此外,基因型 BRRI dhan 84、BRRI dhan 81 和 BRRI dhan 67 的谷物产量最高。Rangpur 环境在四种环境中表现出相当大的稳定性,谷物产量平均值较高(7 206 kg-ha-1)。因此,AMMI 模型是在孟加拉国不同地区和不同条件下确定最合适、最稳定且具有高产潜力的波罗水稻基因型的重要工具。
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引用次数: 0
Phytotoxic and Cytotoxic Effects, Antioxidant Potentials, and Phytochemical Constituents of Stevia rebaudiana Leaves. 甜叶菊叶的植物毒性和细胞毒性作用、抗氧化潜力和植物化学成分
IF 2.3 Q2 BIOLOGY Pub Date : 2024-06-30 eCollection Date: 2024-01-01 DOI: 10.1155/2024/2200993
Einstivina Nuryandani, Dedy Kurnianto, Jasmadi Jasmadi, Ardiba Rakhmi Sefrienda, Erliana Novitasari, Erni Apriyati, Yeyen Prestyaning Wanita, Siti Dewi Indrasari, Rofiq Sunaryanto, Donowati Tjokrokusumo, Alvi Yani, Indyaswan Tegar Suryaningtyas, Yusuf Andriana

Stevia (Stevia rebaudiana), recognized for its low-calorie, sugar-free attributes, and various health benefits, has potential applications beyond human consumption, particularly in agriculture. This study explored the potential uses of Stevia in both agricultural and healthcare contexts by examining its plant-inhibitory, cytotoxic, and antioxidant effects. The methanolic extract of Stevia leaves was fractionated into hexane, ethyl acetate, chloroform, and water fractions. These fractions were then subjected to the bioassay analyses above and underwent identification of their chemical constituents. The results indicated that the ethyl acetate fraction demonstrated significant inhibitory effects on weed germination and growth of Beggars tick (Bidens frondosa) (100% inhibition at 1000 ppm of dose). This fraction also exhibited the highest antioxidant activity, total phenolic, and total flavonoid contents (IC50 DPPH = 18.67 μg/mL, 103.50 mg GAE/g fraction, and 410.16 mg QE/g fraction, respectively). In contrast, the chloroform fraction showed the highest cytotoxic effect (LC50 = 700.01 ppm) in the brine shrimp (Artemia salina) mortality evaluation. Pearson's correlation analysis revealed a positive correlation among plant inhibitory effects, antioxidant potentials, and phenolic/flavonoid contents of Stevia. FTIR spectra confirmed the presence of phenols and nonpolar components in the ethyl acetate and chloroform fractions. In addition, GC-MS analysis successfully identified Stevia's key constituents, including tetracontane, hexadecane, hexadecanoic acid, methyl ester in the ethyl acetate fraction, and spiro [4.5] decan-7-one and 6-hydroxy-4,4,7a-trimethyl-5,6,7,7a-tetrahydrobenzofuran-2(4H)-one in the chloroform fraction. This study underscores the potential of S. rebaudiana as a source of natural antioxidants and herbicides, offering valuable insights into its diverse applications in agriculture.

甜叶菊(Stevia rebaudiana)因其低热量、无糖的特性和各种健康益处而受到认可,其潜在用途超出了人类的消费范围,尤其是在农业方面。本研究通过考察甜叶菊的植物抑制、细胞毒性和抗氧化作用,探索了甜叶菊在农业和医疗保健领域的潜在用途。甜叶菊叶的甲醇提取物被分成正己烷、乙酸乙酯、氯仿和水馏分。然后对这些馏分进行上述生物测定分析,并对其化学成分进行鉴定。结果表明,乙酸乙酯馏分对杂草的发芽和乞丐蜱(Bidens frondosa)的生长有明显的抑制作用(在 1000 ppm 的剂量下抑制率为 100%)。该馏分的抗氧化活性、总酚和总黄酮含量也最高(IC50 DPPH = 18.67 μg/mL、103.50 mg GAE/g馏分和410.16 mg QE/g馏分)。相比之下,在盐水虾(Artemia salina)死亡率评估中,氯仿馏分显示出最高的细胞毒性效果(LC50 = 700.01 ppm)。皮尔逊相关分析表明,甜叶菊的植物抑制作用、抗氧化潜力和酚类/类黄酮含量之间存在正相关。傅立叶变换红外光谱证实乙酸乙酯和氯仿馏分中含有酚类和非极性成分。此外,气相色谱-质谱分析成功鉴定了甜叶菊的主要成分,包括乙酸乙酯馏分中的四碳烷、十六烷、十六烷酸和甲酯,以及氯仿馏分中的螺[4.5]癸烷-7-酮和 6-羟基-4,4,7a-三甲基-5,6,7,7a-四氢苯并呋喃-2(4H)-酮。这项研究强调了 S. rebaudiana 作为天然抗氧化剂和除草剂来源的潜力,为其在农业中的多种应用提供了宝贵的见解。
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引用次数: 0
Antimalarial and Immunomodulatory Activities of Tithonia diversifolia (Asteraceae) Leave Flafonoids-Rich Extract Used in Cameroonian Traditional Medecine. 喀麦隆传统医学中使用的 Tithonia diversifolia(菊科)富含叶黄素的提取物的抗疟和免疫调节活性。
IF 2.3 Q2 BIOLOGY Pub Date : 2024-06-26 eCollection Date: 2024-01-01 DOI: 10.1155/2024/8645178
Ntonifor Helen Ngum, Ndoah Ellen Masakebenagha, Oumar Mahamat

Background: Phytochemicals are considered the reliable source for the treatment of infection including malaria. Especially, phenols are known as potentially toxic to the growth and development of pathogens, among which flavonoids are the most extensively studied and play more intensive roles in ethnopharmacology. The immunological effect and role of T. diversifolia flavonoids-rich extract in treatment of malaria have therefore been examined in this study.

Methods: In vitro test against Plasmodium falciparum and 4-day suppressive and Rane's tests against Plasmodium berghei in mice were used to evaluate the antimalarial activities. TNF-α and INF-γ levels, phagocytic tests, and production of oxygen and nitrogen radical were assessed to appreciate the immunomodulatory activity. One-way analysis of variance followed by post hoc Student's t tests was used for data analysis.

Results: T. diversifolia flavonoids-rich extract at the concentrations ranging from 0.0004 mg/ml significantly (p < 0.05) inhibited in a concentration-dependent manner the growth of trophozoite up to 100% inhibition with 0.025 mg/ml at 24 and 48 hrs. Moreover, T. diversifolia flavonoids-rich extract reduced the level of parasitemia and improved in a dose-dependent manner the survival time of infected mice significantly (p < 0.05) compared to their control in 4-day suppressive test as well as in Rane's test. Additionally, T. diversifolia flavonoids-rich extract increased the TNF-α and INF-γ levels in rats infected by P. berghei. Furthermore, the flavonoid-rich extract enhanced weight of spleen in the rats, the metabolic and phagocytic activities of the peritoneal cells, and the concentration of nitric oxide and oxygen radicals in methylprednisolone-immunocompromised rats compared to the control (p < 0.05).

Conclusion: The study has revealed that T. diversifolia flavonoids-rich extract through its antiplasmodial and phagocytic activities is a promising treatment of malaria.

背景:植物化学物质被认为是治疗包括疟疾在内的感染的可靠来源。众所周知,酚类物质对病原体的生长发育具有潜在毒性,其中黄酮类物质的研究最为广泛,在民族药理学中发挥着更重要的作用。因此,本研究对富含黄酮类的 T. diversifolia 提取物在治疗疟疾方面的免疫学效应和作用进行了研究:方法:采用针对恶性疟原虫的体外试验以及针对小鼠疟原虫的 4 天抑制试验和雷恩试验来评估其抗疟活性。通过评估 TNF-α 和 INF-γ 的水平、吞噬测试以及氧和氮自由基的产生来了解其免疫调节活性。数据分析采用单因素方差分析和事后学生 t 检验:结果:富含多种黄酮类化合物的椴树黄酮提取物对滋养体的生长有显著的抑制作用,浓度从 0.0004 mg/ml 到 0.025 mg/ml(24 和 48 小时),抑制率均为 100%(p < 0.05)。此外,在 4 天抑制试验和 Rane 试验中,与对照组相比,富含 T. diversifolia 黄酮的提取物降低了寄生虫血症水平,并以剂量依赖的方式显著提高了感染小鼠的存活时间(p < 0.05)。此外,富含 T. diversifolia 黄酮的提取物还能提高伯格希氏菌感染大鼠的 TNF-α 和 INF-γ 水平。此外,与对照组相比,富含黄酮的提取物还能提高大鼠脾脏的重量、腹膜细胞的代谢和吞噬活性,以及甲基强的松龙免疫受损大鼠体内一氧化氮和氧自由基的浓度(p < 0.05):研究表明,富含黄酮类的 T. diversifolia 提取物具有抗疟和吞噬细胞活性,是一种治疗疟疾的有效方法。
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引用次数: 0
Tpeak-Tend ECG Marker in Obesity and Cardiovascular Diseases: A Comprehensive Review. 肥胖与心血管疾病中的 Tpeak-Tend 心电图标记:全面回顾
IF 2.3 Q2 BIOLOGY Pub Date : 2024-06-26 eCollection Date: 2024-01-01 DOI: 10.1155/2024/4904508
Irena Dykiert, Kamila Florek, Krzysztof Kraik, Paweł Gać, Rafał Poręba, Małgorzata Poręba

Globally, cardiovascular diseases are still the leading cause of death. Numerous methods are used to diagnose cardiovascular pathologies; there is still a place for straightforward and noninvasive techniques, such as electrocardiogram (ECG). Depolarization and repolarization parameters, including QT interval and its derivatives, are well studied. However, the Tpeak-Tend interval is a novel and promising ECG marker with growing evidence for its potential role in predicting malignant arrhythmias. In this review, we discuss the association between the Tpeak-Tend interval and several cardiovascular diseases, including long QT syndrome, cardiomyopathies, heart failure, myocardial infarction, and obesity, which constitutes one of the risk factors for cardiovascular diseases.

在全球范围内,心血管疾病仍然是导致死亡的主要原因。诊断心血管疾病的方法有很多,但心电图(ECG)等直接、无创的技术仍占有一席之地。去极化和复极化参数,包括 QT 间期及其衍生物,已被广泛研究。然而,Tpeak-Tend 间期是一种新颖而有前途的心电图标记,越来越多的证据表明它在预测恶性心律失常方面具有潜在作用。在这篇综述中,我们将讨论 Tpeak-Tend 间期与几种心血管疾病之间的关联,包括长 QT 间期综合征、心肌病、心力衰竭、心肌梗死和肥胖(肥胖是心血管疾病的危险因素之一)。
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