pellet

颗粒
  • 文章类型: Journal Article
    空气污染和温室气体产量的增加促使人们更多地使用可再生能源;欧盟设定了一个目标,即到2030年,绿色能源的使用量应达到32%。考虑到这一点,在过去的十年里,意大利对颗粒的需求增加了一倍多,使意大利成为欧洲第二大消费国。在炉子中燃烧的颗粒的质量对室内和室外污染至关重要。在其他参数中,水分和灰分用于根据ENISO17225:2014对颗粒进行分类。这项工作涉及分析意大利市场上一些成品和一些原材料的有机和无机部分(例如,木片)根据技术标准EN14778:2011取样。分析结果表明存在一些对人体健康有潜在危害的物质,如甲醛,丙酮,甲苯和苯乙烯的有机部分和镍,铅和钒为无机部分。化学计量学方法表明,无机部分是研究样品多样化的最大原因。对某些物质的检测可能是对此类物质影响的警钟,对环境和人类健康都是如此。
    Air pollution and the increasing production of greenhouse gases has prompted greater use of renewable energy sources; the EU has set a target that the use of green energy should be at 32 percent by 2030. With this in mind, in the last 10 years, the demand for pellets in Italy has more than doubled, making Italy the second largest consumer in Europe. The quality of the pellets burned in stoves is crucial to indoor and outdoor pollution. Among other parameters, moisture and ash are used to classify pellets according to EN ISO 17225:2014. This work involved the analysis of the organic and inorganic fraction of both some finished products on the Italian market and some raw materials (e.g., wood chips) sampled according to the technical standard EN 14778:2011. The analytical results showed the presence of some substances potentially harmful to human health such as formaldehyde, acetone, toluene and styrene for the organic fraction and nickel, lead and vanadium for the inorganic fraction. The chemometric approach showed that it is the inorganic fraction which is most responsible for the diversification of the samples under study. The detection of some substances may be a warning bell about the impact of such materials, both for the environment and for human health.
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  • 文章类型: Journal Article
    未经证实:无反应的皮肤科感染数量的增加引起了全国皮肤科医生的深切关注。伊曲康唑质量的变化可能是导致某些皮肤癣菌感染无反应的因素。本文将以一种简单的方式分析OPD中的事物来解决这个问题,并可能帮助我们意识到并采取正确的行动。
    UNASSIGNED:通过观察不同品牌的颗粒/珠子的形态特性来评估伊曲康唑品牌的质量。
    未经批准:在这项研究中,随机选择临床常用的10个品牌伊曲康唑。颗粒计数和颗粒大小的定性形态分析(小,大,或混合),形状(均匀或不均匀),无定形物质的存在由三个独立的观察者进行。此外,通过在等量的水中添加颗粒来评估某些品牌的溶出曲线。
    UNASSIGNED:品牌的颗粒计数从品牌1的每个胶囊856个颗粒到品牌8的每个胶囊109个颗粒不等。品牌1、品牌2和品牌7颗粒小且形态均匀。品牌3、品牌4和品牌10颗粒在尺寸上混合但在形态上均匀。品牌9颗粒混合且不均匀,而品牌5,品牌6和品牌8颗粒混合在尺寸上,形状不均匀,并且存在无定形物质。溶出度测试显示,品牌5迅速溶解并使清澈的水颜色变成乳白色。
    UNASSIGNED:对伊曲康唑颗粒进行简单的皮肤镜检查可能会提供有关伊曲康唑品牌质量的周到见解。对于计划用伊曲康唑治疗的所有皮肤癣菌感染,可以将其视为常规做法。
    UNASSIGNED: Rising number of the nonresponding dermatophytic infections raises deep concerns among the dermatologists across the nation. Variations in the quality of itraconazole may be a contributing factor to nonresponse in certain dermatophytic infections. This article will address this issue in a simple way of analyzing things in an OPD and may help us in being aware and taking the right foot forward.
    UNASSIGNED: To assess the quality of itraconazole brands by observing the morphological properties of pellets/beads in different brands.
    UNASSIGNED: In this study, 10 brands of itraconazole that are commonly used in clinical practice were randomly selected. Pellet counts and qualitative morphological analysis of pellets as size (small, large, or mixed), shape (uniform or nonuniform), and presence of amorphous material was performed by three independent observers. Also, dissolution profile of some brands was assessed by adding the pellets in equal quantity of water.
    UNASSIGNED: The pellet counts of brands varied from 856 pellets per capsule in brand 1 to 109 pellets per capsule in brand 8. Brand 1, brand 2, and brand 7 pellets were small and uniform in morphology. Brand 3, brand 4, and brand 10 pellets were mixed in size but uniform in morphology. Brand 9 pellets were mixed and nonuniform whereas brand 5, brand 6, and brand 8 pellets were mixed in size, nonuniform in shape, and had presence of amorphous material. Dissolution test revealed that brand 5 dissolved rapidly and turned clear water color to milky white.
    UNASSIGNED: A simple dermoscopy examination of itraconazole pellets may provide thoughtful insights about the quality of itraconazole brand. It may be considered as routine practice for all dermatophytic infection planned for treatment with itraconazole.
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  • 文章类型: Journal Article
    UNASSIGNED: Testosterone (T) therapy has been shown to be breast protective in both pre- and post-menopausal patients. Additionally, estradiol (E) does not cause breast cancer (BC) in the majority of the world\'s literatures. This study aimed to investigate the incidence of invasive BC (IBC) in pre- and postmenopausal women treated with T therapy and T in combination with E (T/E).
    UNASSIGNED: Since January 2010, a total of 2,377 pre- and post-menopausal women were treated with T or T/E implants. IBC rates were reported based on newly diagnosed IBC cases in the total study. Total cases divided by the total sample size and years in study was expressed as an incidence per 100,000 person-years (P-Ys). The BC incidence was compared with age-specific Surveillance Epidemiology and End Results (SEER) incidence rates.
    UNASSIGNED: As of October 2020, 14 cases diagnosed with IBC have been found in 9,746 P-Y of follow up for an incidence of 144 cases per 100,000 P-Y, substantially less than the age-specific SEER incidence rates (223/100,000), placebo arm of Women\'s Health Initiative Study (330/100,000), and never users of hormone therapy from the Million Women Study (312/100,000).
    UNASSIGNED: T and/or T/E pellet implants significantly reduced the incidence of BC in pre- and post-menopausal women. The addition of E did not increase the incidence over using T alone. This is the second multi-year long-term study demonstrating the benefits of T therapy in reducing the incidence of IBC.
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  • 文章类型: Journal Article
    In this study, the pyrolysis behavior and kinetics of raw biomasses and their pellets were studied by Coats Redfern and DAEM methods. The results demonstrated that the similar activation energies obtained by both methods confirmed accuracy of the kinetics calculation. The activation energy of the pellets was 132.49-232.44 kJ mol-1, slightly higher than those of raw biomasses, which was 120.58-210.55 kJ mol-1. The results from Coats Redfern method showed that the pyrolysis of all the samples were controlled by mass and heat diffusion. DAEM revealed that the activation energies of the pellets were higher than those of raw biomasses during hemicellulose and cellulose decomposition stages, and was opposite for the lignin decomposition stage. Physical structure characterization indicated that the pellets had smaller surface area and more compact surface than those of their raw biomasses. Hence, the mass and heat diffusion were suppressed and more cross-linking reactions occurred during pellets pyrolysis.
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  • 文章类型: Journal Article
    丝状真菌是公认的生产宿主,其形态之间具有很强的相互联系。生理学,和生产力。对于产黄青霉中的青霉素生产,工业过程通常有利于包含致密菌丝团聚体的颗粒形态。从本质上讲,这些紧密堆积的纠缠会导致不活跃,由于限制,颗粒核心内的降解部分。最佳工艺设计需要详细了解生物质生产区的局限性和本地化的性质,这通常可以通过建模和复杂的分析方法获得,如氧微电极和组织学研究。结合生理和形态洞察力的方法对于丝状真菌至关重要,但却很少。在这项研究中,我们使用飞行时间二次离子质谱结合氧和葡萄糖示踪底物,样品制备和测量需要很少的努力。通过使用18O作为示踪剂,我们的方法能够分析各种形态结构中的氧气和底物吸收。并行,我们可以通过鉴定青霉素质量碎片来评估生产生物量区域,以同时研究氧扩散,底物掺入,和生产性生物质部分。
    Filamentous fungi are well-established production hosts that feature a strong interconnection between morphology, physiology, and productivity. For penicillin production in Penicillium chrysogenum, industrial processes frequently favor a pellet morphology comprising compact hyphal agglomerates. Inherently these tightly packed entanglements lead to inactive, degrading sections within the pellet\'s core because of limitations. Optimal process design requires detailed knowledge of the nature of the limitations and localization of productive zones in the biomass, which is generally obtainable through modeling and complex analytical methods such as oxygen microelectrode and histological investigations. Methods that combine physiological and morphological insight are crucial yet scarce for filamentous fungi. In this study, we used time-of-flight secondary ion mass spectrometry in combination with oxygen and glucose tracer substrates, requiring little effort for sample preparation and measurement. Our method is capable of analyzing oxygen and substrate uptake in various morphological structures by the use of 18O as a tracer. In parallel, we can assess productive biomass regions through identification of penicillin mass fragments to simultaneously study oxygen diffusion, substrate incorporation, and productive biomass sections.
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  • 文章类型: Journal Article
    真菌发酵用于产生多种酶,化学品,和各种行业的药物。在水下种植期间,丝状真菌形成一系列宏观形态,包括分散的菌丝体,结块的骨料,或颗粒,这对发酵过程中的流变方面有重要影响,气体/营养转移,and,因此,产品滴度。菌株工程努力的一个重要组成部分是定量评估真菌生长表型的能力,这将为形态优化的生产菌株带来新的线索。
    在这项研究中,我们开发了一个自动图像分析管道,以量化颗粒状和分散生长(MPD)的形态,快速,可重复地测量任何浸没真菌培养物的分散和颗粒状宏观形态。它(i)可以捕获和分析每个用户/天的数百个图像,(ii)旨在定量评估由分散和颗粒状形式组成的异质培养物,(iii)给出了文化异质性的定量测量,(iv)自动生成单个真菌结构的关键欧几里得参数,包括颗粒直径,纵横比,area,和坚固,它们也被组装成先前描述的无量纲形态数MN,(v)具有内置的质量控制检查,使最终用户能够轻松确认自动呼叫的准确性,和(vi)容易适应用户指定的放大倍数和宏观形态定义。同时为该图像分析管道的实用性提供原理证明,并为形态优化的真菌菌株提供新的线索,我们基于CRISPR-Cas技术在黑曲霉细胞工厂中产生了形态突变体。首先,我们询问了先前发表的A.niger共表达网络,以鉴定一种推定的γ-适应素编码基因(aplD),该基因被预测在内体货物运输中起作用.基因编辑用于在可滴定的Tet-on系统的控制下产生条件aplD表达突变体。apro表达降低导致超支化生长表型和颗粒形成的多种缺陷,并推定蛋白质分泌增加。这种可能的蛋白质分泌过多表型可能与分散菌丝体的增加有关,颗粒直径和MN均减小。
    MPD图像分析管道是一个简单的,快速,和灵活的方法来量化不同的真菌形态。作为一个例子,我们已经证明,推定的内体转运基因aplD在水下培养过程中在黑曲霉丝状生长和颗粒形成中起着至关重要的作用。这表明胞吞成分是工程化真菌细胞工厂的未充分开发的靶标。
    UNASSIGNED: Fungal fermentation is used to produce a diverse repertoire of enzymes, chemicals, and drugs for various industries. During submerged cultivation, filamentous fungi form a range of macromorphologies, including dispersed mycelia, clumped aggregates, or pellets, which have critical implications for rheological aspects during fermentation, gas/nutrient transfer, and, thus, product titres. An important component of strain engineering efforts is the ability to quantitatively assess fungal growth phenotypes, which will drive novel leads for morphologically optimized production strains.
    UNASSIGNED: In this study, we developed an automated image analysis pipeline to quantify the morphology of pelleted and dispersed growth (MPD) which rapidly and reproducibly measures dispersed and pelleted macromorphologies from any submerged fungal culture. It (i) enables capture and analysis of several hundred images per user/day, (ii) is designed to quantitatively assess heterogeneous cultures consisting of dispersed and pelleted forms, (iii) gives a quantitative measurement of culture heterogeneity, (iv) automatically generates key Euclidian parameters for individual fungal structures including particle diameter, aspect ratio, area, and solidity, which are also assembled into a previously described dimensionless morphology number MN, (v) has an in-built quality control check which enables end-users to easily confirm the accuracy of the automated calls, and (vi) is easily adaptable to user-specified magnifications and macromorphological definitions. To concomitantly provide proof of principle for the utility of this image analysis pipeline, and provide new leads for morphologically optimized fungal strains, we generated a morphological mutant in the cell factory Aspergillus niger based on CRISPR-Cas technology. First, we interrogated a previously published co-expression networks for A. niger to identify a putative gamma-adaptin encoding gene (aplD) that was predicted to play a role in endosome cargo trafficking. Gene editing was used to generate a conditional aplD expression mutant under control of the titratable Tet-on system. Reduced aplD expression caused a hyperbranched growth phenotype and diverse defects in pellet formation with a putative increase in protein secretion. This possible protein hypersecretion phenotype could be correlated with increased dispersed mycelia, and both decreased pellet diameter and MN.
    UNASSIGNED: The MPD image analysis pipeline is a simple, rapid, and flexible approach to quantify diverse fungal morphologies. As an exemplar, we have demonstrated that the putative endosomal transport gene aplD plays a crucial role in A. niger filamentous growth and pellet formation during submerged culture. This suggests that endocytic components are underexplored targets for engineering fungal cell factories.
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  • 文章类型: Journal Article
    Fungi assisted microalgae bioflocculation is an emerging, efficient and cost-effective microalgal harvesting method, but no study has systematically evaluated and compared fungal spore-assisted (FSA) and fungal pellet-assisted (FPA) microalgal harvesting methods. In this study, harvesting Chlorella sp. cells by co-culture with Penicillium sp. spores or pellets was compared. Temperature, glucose concentration, pH and fungi:algae ratio were the critical parameters for harvesting efficiency. The highest flocculation efficiency (99%) of FSA method was achieved in 28 h at 40 °C, 160 rpm, 5 g glucose/L and 1.1 × 104 cells/mL (spore). FPA method can harvest 98.26% algae cells in 2.5 h at 34 °C, 160 rpm, pH 4.0 with the fungi:algae ratio of 1:2. The carbon input for FPA is only half of that for FSA. FPA takes less time and needs less glucose input compared with FSA and may be more promising to be further developed as an effective microalgae bioflocculation method.
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