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The efficacy of gum arabic coating in postharvest preservation of grapes 阿拉伯胶包衣对葡萄采后保鲜的效果
Pub Date : 2022-01-01 DOI: 10.5455/egyjebb.20220528071353
Rabab A Ghanem, R. Hassanein, Saher Elkhawas, A. Younis
The current study evaluated the efficacy of gum arabic (GA) safe edible coating on nutritional properties, phenolic compounds, and antioxidant capacity of grapevine (Vitis vinifera L.) cv. ‘Flame Seedless’. The grapes were coated with 0, 1, 3, 5, 7% GA, and then stored at 4 ± 1°C with 90 ± 2% RH for 30 days. GA coating at 5% significantly reduced weight loss, repressed titratable acidity (TA) degradation, and postponed the rise of total soluble solid (TSS) content. Also, 5% GA treatment suppressed the loss of ascorbic acid (AA), total phenolic content (TPC), as well as individual phenolic compounds. Moreover, 5% GA-coated fruits exhibited substantially the highest antioxidant capacity (DPPH), antioxidant enzyme activities (POD and CAT), and anthocyanin content. Therefore, it is evident that GA at 5% is a potential postharvest coating to maintain overall quality of ‘Flame Seedless’ grapevine fruit during cold storage.
本研究评估了阿拉伯胶(GA)安全可食用涂层对葡萄(Vitis vinifera L.)的营养特性、酚类化合物和抗氧化能力的影响。“火焰无核”。葡萄分别涂上0、1、3、5、7% GA,在4±1℃、90±2% RH条件下保存30天。5%的GA涂层显著降低了失重,抑制了可滴定酸(TA)的降解,延缓了总可溶性固形物(TSS)含量的上升。此外,5% GA处理抑制了抗坏血酸(AA)、总酚含量(TPC)和单个酚类化合物的损失。此外,5% ga包膜的果实具有最高的抗氧化能力(DPPH)、抗氧化酶(POD和CAT)活性和花青素含量。因此,很明显,5%的GA是一种潜在的采收后涂层,可以在冷藏期间保持“火焰无籽”葡萄柚果实的整体质量。
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引用次数: 0
Antibacterial activity of medicinal plants and propolis extracts as well as their synergistic effect with antibiotics on pathogenic bacteria 药用植物和蜂胶提取物的抑菌活性及其与抗生素对致病菌的协同作用
Pub Date : 2022-01-01 DOI: 10.5455/egyjebb.20220109065149
R. Zadeh, M. Koupaei, Sajjad Asgharzadeh, B. Kalani, Johar Pourghader, Atieh Darbandi, V. Mahabadi, F. Jazi
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引用次数: 0
Isolation of oleaginous fungi from natural sources, and fatty acid profile of Cunninghamella echinulata 天然产油真菌的分离及棘皮Cunninghamella echinulata的脂肪酸谱
Pub Date : 2022-01-01 DOI: 10.5455/egyjebb.20221107011617
M. Gharieb, Mai Badawy, G. Elreesh
Oleaginous microorganisms accumulate 20% or more of their dry weight as lipid. In the present study, 247 fungal isolates were obtained from different types of soil, marine water, and food, and screened for their ability to accumulate considerable amounts of lipid. A primary screening with Nile red staining was followed by sulfo-phosphovanillin reaction. The most potent isolate was identified employing both morphological and molecular methods as the Zygomycetous fungus, Cunninghamella echinulata AUMC14396. The lipid of this fungus was extracted, transesterified, and analyzed via GC-MS to elucidate the fatty acid (FA) composition. The fatty acid profile revealed the presence of various fatty acids with different concentrations. Of the total fatty acids, saturated FAs comprised 44.49%, while monounsaturated FAs were 19.91%, and polyunsaturated fatty acids (PUFAs) were 35.61%. The most predominant species was linoleic acid (13.79%) followed by stearic (12.78%) and oleic (12.50%) acids. The polyunsaturated fatty acid, gamma linolenic acid was present in a considerable amount (8.02%). Other important PUFAs were also found in the fatty acid profile such as arachidonic acid, eicosapentaenoic acid, and docosahexaenoic acid. The results of this study were discussed in respect to the important applications in the context of production of pharmaceuticals and nutraceuticals.
产油微生物以脂质形式积累了其干重的20%或更多。在本研究中,从不同类型的土壤、海水和食物中分离出247株真菌,并对其积累大量脂质的能力进行了筛选。用尼罗红染色进行初步筛选,然后进行硫磷香兰素反应。形态学和分子生物学方法鉴定出最有效的分离株为接合菌Cunninghamella echinulata AUMC14396。提取真菌脂质,经酯交换处理,GC-MS分析其脂肪酸组成。脂肪酸谱显示存在不同浓度的各种脂肪酸。饱和脂肪酸占总脂肪酸的44.49%,单不饱和脂肪酸占19.91%,多不饱和脂肪酸占35.61%。以亚油酸为主(13.79%),其次为硬脂酸(12.78%)和油酸(12.50%)。多不饱和脂肪酸γ -亚麻酸含量相当高(8.02%)。在脂肪酸谱中还发现了其他重要的PUFAs,如花生四烯酸、二十碳五烯酸和二十二碳六烯酸。讨论了本研究结果在药品和保健品生产中的重要应用。
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引用次数: 0
Climate Changes between International Conventions or Protocols and Scientific Impacts 国际公约或议定书与科学影响之间的气候变化
Pub Date : 2022-01-01 DOI: 10.5455/egyjebb.20220815041125
Fawzy Younis, M. Mohamed, A. Khan, No author No author, Amira Ramadan, and Ammar
Climate change and related challenges are affecting all over the world, particularly, African's 2030 path of sustainable development, especially in the desert regions, which include the most vulnerable and vulnerable systems. Climate changes are a natural phenomenon that occurs every several millennia, but increased last years as a result of human activity. It transcends the geographical boundaries of countries and poses a global threat. The steady increase in global surface air temperatures has been confirmed (0.3 and 0.6 oc) over the past 100 years. Any disruption of the Earth's ecosystem in general, increasing average atmospheric temperature, melting of the poles, inundation of island States and deltas, disruption of rainfall patterns, negative impacts on agricultural land productivity, water needs, public health and transmission of epidemic diseases. This review light on scientific concept of climate changes, climate change risks, climate worming and human footprint. Moreover, this review aims to discuss the historical development of international agreements, treaties and protocols that discussed addressing climate change and its current and future effects. Moreover, this review aims to discuss the historical development of international agreements, treaties and protocols that discussed addressing climate change and its current and future effects. Briefly, it summarizes what will happen to the blue planet if the reasons of climate changes continue?
气候变化和相关挑战正在影响世界各地,特别是非洲的2030年可持续发展道路,特别是在沙漠地区,其中包括最脆弱和最脆弱的系统。气候变化是一种每几千年发生一次的自然现象,但由于人类活动,近年来气候变化有所加剧。它超越了国家的地理边界,构成全球威胁。在过去的100年里,全球地表气温的稳定上升已经得到证实(0.3和0.6摄氏度)。对地球一般生态系统的破坏、大气平均温度升高、两极融化、岛屿国家和三角洲被淹没、降雨模式被破坏、对农业土地生产力、水需求、公共卫生和流行病传播产生负面影响。本文综述了气候变化的科学概念、气候变化风险、气候蠕虫和人类足迹。此外,本综述旨在讨论讨论应对气候变化及其当前和未来影响的国际协定、条约和议定书的历史发展。此外,本综述旨在讨论讨论应对气候变化及其当前和未来影响的国际协定、条约和议定书的历史发展。简而言之,它总结了如果气候变化的原因继续下去,这个蓝色星球会发生什么?
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引用次数: 0
Prevalence of Escherichia coli and Antibiotic Resistance in Clinical and Food Samples 临床及食物样本中大肠杆菌的流行及抗生素耐药性
Pub Date : 2022-01-01 DOI: 10.5455/egyjebb.20220802080606
H. Fathy, Abd Shanshoury, R. Domany, Perihan S. Ateya
Escherichia coli is a crucial indicator of hygiene for animal derived foods and clinical samples. Since E. coli is a zoonotic disease, its contamination poses a severe risk to public health due to the consumption of foods that have been treated with antibiotics and the overuse of antibiotics to treat a variety of bacterial infections in humans. Therefore, the objective of this investigation was to ascertain the emergence of MDR E. coli strains in specific foods and clinical samples from Egypt. Fifteen clinical samples of urine, stool, and pus, and 15 dietary samples containing vegetables, meat, milk, cheese, and chicken were randomly obtained from various locations in Egypt for this study. The thirty E. coli-positive samples that were isolated from the two sources were tested for antibiotic susceptibility to eleven different antibiotics and biochemical identification. According to the study, all clinical isolates were completely resistant to both ampicillin/sulbactam and amoxicillin/clavulanic acid. Cefoxitin and cephalexin resistance were present in 93.3 and 86.6 percent of the isolates, respectively. On the other hand, all clinical isolates were sensitive to Imipenem. However, all the food isolates were sensitive to Levofloxacin, Aztreonam, and Imipenem, whereas 100% of the isolates were resistant to Ampicillin/Sulbactam and 93.3 percent of the isolates were resistant to Amoxicillin/Clavulanic acid. We discovered that both individual and MDR-resistant E. coli were widespread in clinical and feed samples. This may suggest that these foods produced by animals and plants have the potential to contaminate other foods and other peoples with antibiotic-resistant E. coli, raising a potential public health issue. This study highlights the importance of promoting sanitation and minimizing the use of antibiotics. It is crucial to perform a multicenter study to assess the spread and evolution of MDR E. coli in hospital studies, as well as in foods originating from both plants and animals.
大肠杆菌是动物源性食品和临床样品的重要卫生指标。由于大肠杆菌是一种人畜共患疾病,它的污染对公众健康构成严重威胁,因为食用了用抗生素处理过的食物,以及过度使用抗生素来治疗人类的各种细菌感染。因此,本调查的目的是确定埃及特定食品和临床样本中出现的耐多药大肠杆菌菌株。本研究从埃及不同地点随机抽取了15份临床尿液、粪便和脓液样本,以及15份含有蔬菜、肉类、牛奶、奶酪和鸡肉的膳食样本。从两个来源分离的30份大肠杆菌阳性样本进行了11种不同抗生素的药敏试验和生化鉴定。根据研究,所有临床分离株对氨苄西林/舒巴坦和阿莫西林/克拉维酸均完全耐药。头孢西丁和头孢氨苄耐药分别占93.3%和86.6%。临床分离株对亚胺培南均敏感。食品分离菌对左氧氟沙星、氨曲南和亚胺培南均敏感,对氨苄西林/舒巴坦的耐药率为100%,对阿莫西林/克拉维酸的耐药率为93.3%。我们发现个体和耐多药大肠杆菌在临床和饲料样本中广泛存在。这可能表明,这些由动物和植物生产的食物有可能用耐抗生素的大肠杆菌污染其他食物和其他人,从而引发潜在的公共卫生问题。这项研究强调了促进卫生和尽量减少抗生素使用的重要性。开展多中心研究以评估耐多药大肠杆菌在医院研究中的传播和进化,以及在源自植物和动物的食物中的传播和进化,是至关重要的。
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引用次数: 0
Microbiological Assessement of El-Salam Canal 萨拉姆运河微生物评价
Pub Date : 2022-01-01 DOI: 10.5455/egyjebb.20220323094533
Shaimaa Sayed, T. Rahman, Mohesen Sayed, M. Kholy
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引用次数: 0
ISOLATION, IDENTIFICATION, AND DETECTION OF LIGNINOLYTIC CAPABILITY OF SOME FUNGI ISOLATED FROM SOIL SAMPLES IN EGYPT. 从埃及土壤样品中分离的几种木质素降解真菌的分离、鉴定和检测。
Pub Date : 2022-01-01 DOI: 10.5455/egyjebb.20220629084930
M. Bedaiwy, O. Awadalla, M. Metwally, A. Samad
In the present study, twenty-seven fungal species were isolated, purified, and identified from five mixed soil samples collected from Tanta City, Gharbia Governorate, Egypt. The isolated fungal species belonging to nine genera i.e., Aspergillus, Cephalosporium, Fusarium, Penicillium, Botritrichom, Trichoderma, Alternaria, Cladosporium and Scopulariopsis, in addition to two white rot fungi Ganoderma lucidum and Lentinula edodes obtained from Mushroom Laboratory Culture Collection (MLCC), El-Giza, Egypt. The ligninolytic activities of the isolated fungi were evaluated on PDA plates containing 0.02% guaiacol as a chromogenic reagent. Out of the twenty-nine fungal species tested, only three fungi G. lucidum, L. edodes and T. harzianum (isolate 2) showed ligninolytic potential and reddish-brown color zone formed due to guaiacol oxidation. The three positive fungal strains were screened quantitively for Laccase (Lac; E.C. 1.10.3.2), Manganese dependent peroxidase (MnP; E.C. 1.11.1.13), and Lignin peroxidase (LiP; E.C. 1.11.1.14) activities. The highest total ligninase activity was recorded by G. lucidum followed by L. edodes and T. harzianum, respectively.
在本研究中,从埃及Gharbia省Tanta市的5个混合土壤样品中分离、纯化和鉴定了27种真菌。从埃及El-Giza的蘑菇实验室培养收集(MLCC)中分离到的真菌属分别为曲霉属、头孢菌属、镰刀菌属、青霉属、Botritrichom属、木霉属、Alternaria属、枝孢菌属和Scopulariopsis属,以及两种白腐菌灵芝菌和香菇菌。在以0.02%愈创木酚为显色剂的PDA平板上测定分离真菌的木素降解活性。在29种真菌中,只有lucidum、L. edodes和T. harzianum 3种真菌(分离物2)表现出木质素降解潜能,并且由于愈疮木酚氧化而形成红褐色区。对3株阳性真菌进行漆酶(Lac)定量筛选;E.C. 1.10.3.2),锰依赖性过氧化物酶(MnP;E.C. 1.11.1.13)和木质素过氧化物酶(LiP;如1.11.1.14)活动。总木质素酶活性最高的是露珠菌,其次是白蜡菌和哈兹菌。
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引用次数: 0
Differential analysis of heavy metals and biochemical compounds of different Mentha species 不同薄荷属植物重金属及生化成分的差异分析
Pub Date : 2022-01-01 DOI: 10.5455/egyjebb.20220407080045
Doaa A. Galilah, Omar Shehaby
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引用次数: 0
Antimicrobial activity of Citrus limon essential oil against Escherichia coli in minced meat 柠檬精油对肉末中大肠杆菌的抑菌活性研究
Pub Date : 2022-01-01 DOI: 10.5455/egyjebb.20220830025307
Amany M. Reyad
The efficacy of lemon oil as a food preservative against the well-known meat pathogen was investigated. Escherichia coli was detected and identified from 20 samples of frozen minced beef by using VITEK II automated system. The disc diffusion method was used to test the antibacterial activity of lemon essential oil diluted in ethanol 70% against E. coli on agar plates. The oil presented a significant antimicrobial activity against the tested bacterium; the minimum inhibitory concentration (MIC) was determined to be 0.25 %, lemon oil (0.25 %) had a measurable inhibitory effect when mixed with beef infected with 106 CFU/ml bacterial load. SEM images of the treated E. coli revealed membrane rupture, abnormal shaped cells, and cellular damage. The volatile profile of the oil revealed that it is mainly composed of monoterpenes, with citral, 6-exohydroxy camphene, and fenchone as the major compounds. The lemon essential oil could be a good alternative for existing biocides due to its potent antibacterial properties and its safety to the environment and human health.
研究了柠檬油作为食品防腐剂对肉制品致病菌的防腐效果。采用VITEK II型自动检测系统对20份冷冻牛肉肉末进行了大肠杆菌检测和鉴定。采用圆盘扩散法在琼脂平板上测定乙醇70%稀释柠檬精油对大肠杆菌的抑菌活性。该油对所测细菌具有显著的抑菌活性;最小抑菌浓度(MIC)为0.25%,与细菌负荷为106 CFU/ml的牛肉混合时,柠檬油(0.25%)具有可测量的抑菌效果。处理后的大肠杆菌的扫描电镜图像显示膜破裂,异常形状的细胞,和细胞损伤。挥发油的挥发性分析表明,其主要成分为单萜,主要成分为柠檬醛、6-外羟基莰烯和茴香酮。柠檬精油具有良好的抗菌性能和对环境和人体健康的安全性,可作为现有杀菌剂的良好替代品。
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引用次数: 0
Molecular Characterization of Fungi Associated with Smoked Micromesistius poutassou (Blue whiting) from Different Markets in Lagos, Nigeria. 尼日利亚拉各斯不同市场烟熏poutassou(蓝白鲑)相关真菌的分子特征
Pub Date : 2022-01-01 DOI: 10.5455/egyjebb.20220623095227
Oluwakemi Ogunyebi, T. Samuel, A. Osibona, Temitope O. Fadipe
Micromesistius poutassou (Blue whiting) popularly called ‘’Panla’’ in Nigeria. It is one of the affordable fishes imported to Nigeria. With the rising cost of meat, milk and protein foods, consumers have become increasingly interested in fish as a source of protein for its availability and affordability rate. Smoked samples of Micromesistius poutassou were randomly purchased from ten different markets in ten local governments in Lagos state. This collection (purchase) were carried out between June and November 2019 (6 months). The associated fungi were isolated using the pour-plate method and extracted its DNA with the aid of Zymo DNA extraction kit. The extracted fungal DNA were amplified by PCR (Polymerase chain reaction) using specific internal transcribed spacer primer (ITS1/ITS4) and sequenced. Of the total 480 smoked Micromesistius poutassou sampled, ten fungi species were identified and characterised. These fungi include: Kodamaea ohmeri, Daldinia eschscholtzii, Aspergillus longivesica, Aspergillus flavus, Phoma sp, Aspergillus sp, Mucor circinelloides, Aspergillus tamarii, Aspergillus niger, and Geotrichum candidum. Results from this study revealed that smoked Micromesistius poutassou, which are being consumed by Lagosians on the daily basis were heavily contaminated with pathogenic fungi.
蓝白鲑(Micromesistius poutassou),在尼日利亚俗称“Panla”。它是尼日利亚进口的价格实惠的鱼类之一。随着肉类、牛奶和蛋白质食品价格的上涨,消费者对鱼类作为蛋白质来源越来越感兴趣,因为它的可获得性和可负担性。从拉各斯州10个地方政府的10个不同市场随机购买了poutassou Micromesistius烟熏样本。本次收集(购买)在2019年6月至11月(6个月)期间进行。采用倾板法分离相关真菌,采用Zymo DNA提取试剂盒提取其DNA。提取的真菌DNA采用特异性内部转录间隔引物(ITS1/ITS4)进行PCR扩增,并测序。在共480份烟熏poutassou Micromesistius样本中,鉴定并鉴定了10种真菌。这些真菌包括:奥墨氏小檗、埃斯肖尔氏黑曲霉、长曲霉、黄曲霉、黄曲霉、黑曲霉、圆形毛霉、柽柳曲霉、黑曲霉和白地霉。本研究结果表明,拉各斯人日常食用的烟熏poutassou被病原菌严重污染。
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引用次数: 0
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THE EGYPTIAN JOURNAL OF EXPERIMENTAL BIOLOGY (Botany)
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