phosphorus

  • 文章类型: Journal Article
    食品安全已引起全球关注,需要先进的方法来快速准确地检测污染物。传感器,值得注意的是它们的易用性,高灵敏度,快速分析,是突出的。已经采用二维(2D)纳米材料来改善传感器性能。特别是,黑磷(BP)以其多功能功能脱颖而出,归因于独特的分层结构,超高电荷迁移率,易于表面功能化,增强光吸收,和可调直接带隙。这些特性表明,BP可以显着提高传感器的选择性,灵敏度,和污染物检测的响应速度。尽管对基于BP的传感器在食品安全方面进行了大量研究,很少有评论得到全面总结。此外,BP准备和稳定性方面的挑战限制了其更广泛的使用。本文综述了近年来关于BP在食品安全中作用的研究。覆盖准备,钝化,和应用。通过对挑战和前景的分析,这篇综述旨在为该领域即将开展的研究提供有见地的指导。
    Food safety has garnered global attention, necessitating advanced methods for the quick and accurate detection of contaminants. Sensors, notable for their ease of use, high sensitivity, and fast analysis, are prominent. Two-dimensional (2D) nanomaterials have been employed to improve sensor performance. Particularly, black phosphorus (BP) stands out with its multifunctional capabilities, attributed to unique layered structure, ultra-high charge mobility, easy surface functionalization, enhanced optical absorption, and tunable direct bandgap. These characteristics suggest that BP could significantly enhance sensor selectivity, sensitivity, and response speed for contaminant detection. Despite numerous studies on BP-based sensors in food safety, few reviews have been comprehensively summarized. Moreover, challenges in BP\'s preparation and stability restrict its wider use. This paper reviews recent research on BP\'s role in food safety, covering preparation, passivation, and applications. Through analysis of challenges and prospects, this review aims to provide insightful guidance for upcoming research in this area.
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  • 文章类型: Journal Article
    在许多快速城市化和工业化的国家,大气污染会引起严重的环境问题,并损害人类和生态系统的健康。大气排放,包括气体和颗粒物,可以通过大气沉积被运回地球表面。大气沉积提供的化学物质可以作为营养物质和/或毒素的水生生态系统,导致水生生物的广泛反应。在水生生物中,浮游植物是水生食物网的基础,是全球初级生产的关键参与者。大气沉积改变了养分的利用率,从而影响了浮游植物的物种丰度和组成。这篇综述全面概述了大气中痕量金属沉积引起的浮游植物的生理反应,含氮化合物,含磷化合物,以及颗粒物中的含硫化合物进入水生生态系统。还讨论了知识差距和未来研究的关键领域。
    In many rapidly urbanizing and industrializing countries, atmospheric pollution causes severe environmental problems and compromises the health of humans and ecosystems. Atmospheric emissions, which encompass gases and particulate matter, can be transported back to the earth\'s surface through atmospheric deposition. Atmospheric deposition supplies chemical species that can serve as nutrients and/or toxins to aquatic ecosystems, resulting in wide-ranging responses of aquatic organisms. Among the aquatic organisms, phytoplankton is the basis of the aquatic food web and is a key player in global primary production. Atmospheric deposition alters nutrient availability and thus influences phytoplankton species abundance and composition. This review provides a comprehensive overview of the physiological responses of phytoplankton resulting from the atmospheric deposition of trace metals, nitrogen-containing compounds, phosphorus-containing compounds, and sulfur-containing compounds in particulate matter into aquatic ecosystems. Knowledge gaps and critical areas for future studies are also discussed.
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  • 文章类型: Journal Article
    人工神经网络(ANNs)在废水处理中的应用日益受到重视,因为它提高了污水处理厂(WWTP)的效率和可持续性。本文探讨了基于人工神经网络的模型在污水处理厂中的应用,专注于最新发表的研究工作,通过展示神经网络在预测中的有效性,估计,和处理各种类型的废水。此外,这篇综述全面审查了神经网络在各种废水处理过程和方法中的适用性,包括膜和膜生物反应器,混凝/絮凝,紫外线消毒过程,和生物治疗系统。此外,它提供了污染物,即有机和无机物质的详细分析,营养素,制药,毒品,杀虫剂,染料,等。,从废水中,利用人工神经网络和基于人工神经网络的模型。此外,它评估人工神经网络的技术经济价值,提供成本估算和能源分析,并概述了人工神经网络在污水处理中的未来研究方向。基于AI的技术用于预测WWTP进水中的化学需氧量(COD)和生物需氧量(BOD)等参数。已经形成了用于估计污染物如总氮(TN)的去除效率的神经网络。总磷(TP),BOD,和污水处理厂废水中的总悬浮固体(TSS)。文献还公开了在WWT中使用AI技术是一种经济且节能的方法。人工智能提高了抽水系统的效率,导致节能,平均节省约10%。该系统可以达到25%的最大节能状态,伴随着高达30%的成本显着降低。
    The application of artificial neural networks (ANNs) in the treatment of wastewater has achieved increasing attention, as it enhances the efficiency and sustainability of wastewater treatment plants (WWTPs). This paper explores the application of ANN-based models in WWTPs, focusing on the latest published research work, by presenting the effectiveness of ANNs in predicting, estimating, and treatment of diverse types of wastewater. Furthermore, this review comprehensively examines the applicability of the ANNs in various processes and methods used for wastewater treatment, including membrane and membrane bioreactors, coagulation/flocculation, UV-disinfection processes, and biological treatment systems. Additionally, it provides a detailed analysis of pollutants viz organic and inorganic substances, nutrients, pharmaceuticals, drugs, pesticides, dyes, etc., from wastewater, utilizing both ANN and ANN-based models. Moreover, it assesses the techno-economic value of ANNs, provides cost estimation and energy analysis, and outlines promising future research directions of ANNs in wastewater treatment. AI-based techniques are used to predict parameters such as chemical oxygen demand (COD) and biological oxygen demand (BOD) in WWTP influent. ANNs have been formed for the estimation of the removal efficiency of pollutants such as total nitrogen (TN), total phosphorus (TP), BOD, and total suspended solids (TSS) in the effluent of WWTPs. The literature also discloses the use of AI techniques in WWT is an economical and energy-effective method. AI enhances the efficiency of the pumping system, leading to energy conservation with an impressive average savings of approximately 10%. The system can achieve a maximum energy savings state of 25%, accompanied by a notable reduction in costs of up to 30%.
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  • 文章类型: Journal Article
    将藻类整合到人工湿地(CWs)中可以增强废水处理,尽管结果各不相同。这篇综述基于文献和荟萃分析评估了藻类在CW中的作用以及不同藻类-CW(A-CW)配置的性能。藻类大大改善了N的去除,尽管它们对其他参数的影响各不相同。统计分析显示,70%的研究报告A-CWs治疗效率提高,化学需氧量(COD)平均去除率达到75%,总氮和铵态氮的74%,总磷(TP)为79%。这篇综述确定了液压保留时间,平均3.1天,以及它们对治疗效果的不同影响。混合效应模型显示,在A-CW中,COD和TP的去除效率每十天略有增加0.6%。未来的研究应该集中在健壮的实验设计上,适当的藻类储存和分离技术,和先进的建模,以优化CW中藻类的处理潜力。
    Integrating algae into constructed wetlands (CWs) enhances wastewater treatment, although the results vary. This review evaluates the role of algae in CWs and the performance of different algae-CW (A-CW) configurations based on literature and meta-analysis. Algae considerably improve N removal, although their impact on other parameters varies. Statistical analysis revealed that 70 % of studies report improved treatment efficiencies with A-CWs, achieving average removal rates of 75 % for chemical oxygen demand (COD), 74 % for total nitrogen and ammonium nitrogen, and 79 % for total phosphorus (TP). This review identifies hydraulic retention times, which average 3.1 days, and their varied impact on treatment efficacy. Mixed-effects models showed a slight increase in COD and TP removal efficiencies of 0.6 % every ten days in the A-CWs. Future research should focus on robust experimental designs, adequate algal storage and separation techniques, and advanced modeling to optimize the treatment potential of algae in CWs.
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  • 文章类型: Journal Article
    钙(Ca)和磷(P)是参与生物学功能的矿物质和骨骼的基本结构成分。身体紧密调节Ca和P以维持体内平衡。孕妇在妊娠和哺乳期对Ca和P的需求增加,以支持受孕体的生长和乳的合成。凋落物大小和凋落物平均日增重(ADG)对母猪的Ca和P需求有很大影响,因为随着它们的增加,由于母猪的需求增加,需求增加。这篇综述的目的是总结从经验数据和因子模型得出的有关妊娠和泌乳母猪对Ca和P的需求的已发表文献。总共审查了9项经验研究和7种析因模型,以确定妊娠期的Ca和P需求。哺乳期,共有六项实证研究和七个阶乘模型进行了回顾。实证研究根据观察到的Ca和P对骨矿化的影响确定需求,母猪和凋落物性能,和牛奶的特点。阶乘模型生成方程,使用维护的主要组成部分来估计Ca和P需求,胎儿和胎盘生长,和孕妇在妊娠中的保留。泌乳中阶乘方程的主要组成部分包括维持和产奶量。在妊娠期,来自经验研究的标准化全道可消化磷(STTDP)需求估计范围为5.4~9.5g/d,总Ca范围为12.9~18.6g/d,以最大化骨测量或性能标准.根据阶乘模型,整个妊娠期间的需求增加,以满足不断增长的胎儿的需求,范围从7.6到10.6g/d和18.4到38.2g/d的STTDP和总Ca,分别,产次1头母猪妊娠第114天。哺乳期,根据经验研究得出的STTDP需求估计为8.5至22.1g/d,总Ca为21.2至50.4g/d。对于泌乳阶乘模型,STTDP的要求范围为14.2至25.1g/d,产仔数为15头猪的产次1头母猪的总Ca要求范围为28.4至55.6g/d。需求估计的巨大差异使得难以定义Ca和P需求;然而,妊娠和哺乳期STTDP的最低水平为6.0和22.1g/d,分别,似乎足以满足基本要求。有限的数据和高度的变化表明需要进一步研究评估妊娠和泌乳母猪的Ca和P需求。
    Calcium (Ca) and phosphorus (P) are minerals involved in biological functions and essential structural components of the skeleton. The body tightly regulates Ca and P to maintain homeostasis. Maternal needs for Ca and P increase during gestation and lactation to support conceptus growth and milk synthesis. Litter size and litter average daily gain (ADG) have a large effect on Ca and P requirements for sows because as they increase, the requirements increase due to a greater need from the sow. The objective of this review was to summarize published literature on Ca and P requirements in gestating and lactating sows derived from empirical data and factorial models. A total of nine empirical studies and seven factorial models were reviewed for determining the Ca and P requirements in gestation. For lactation, there were six empirical studies and seven factorial models reviewed. Empirical studies determined requirements based on the observed effect of Ca and P on bone mineralization, sow and litter performance, and milk characteristics. Factorial models generated equations to estimate Ca and P requirements using the main components of maintenance, fetal and placental growth, and maternal retention in gestation. The main components for factorial equations in lactation include maintenance and milk production. In gestation, the standardized total tract digestible phosphorus (STTD P) requirement estimates from empirical studies range from 5.4 to 9.5 g/d with total Ca ranging from 12.9 to 18.6 g/d to maximize bone measurements or performance criteria. According to the factorial models, the requirements increase throughout gestation to meet the needs of the growing fetuses and range from 7.6 to 10.6 g/d and 18.4 to 38.2 g/d of STTD P and total Ca, respectively, on day 114 of gestation for parity 1 sows. During lactation, STTD P requirement estimates from empirical studies ranged from 8.5 to 22.1 g/d and total Ca ranged from 21.2 to 50.4 g/d. For the lactation factorial models, STTD P requirements ranged from 14.2 to 25.1 g/d for STTD P and 28.4 to 55.6 g/d for total Ca for parity 1 sows with a litter size of 15 pigs. The large variation in requirement estimates makes it difficult to define Ca and P requirements; however, a minimum level of 6.0 and 22.1 g/d of STTD P during gestation and lactation, respectively, appears to be adequate to meet basal requirements. The limited data and high variation indicate a need for future research evaluating Ca and P requirements for gestating and lactating sows.
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  • 文章类型: Journal Article
    农业废物利用的增长趋势遵循“废物到财富”的概念,并与可持续发展目标(SDGs)的主题密切相关。用于废物管理的碳中和技术尚未得到严格审查。本文综述了农业废弃物利用的技术趋势,包括堆肥,热转换,和厌氧消化。具体来说,外源性添加剂对含量的影响,分馏,本文综述了堆肥过程中磷(P)和潜在有毒元素(PTEs)的去向。堆肥过程可以将生物质P和添加剂产生的P转化为植物可用形式。PTE可以在堆肥过程中钝化。生物炭能通过表面吸附等不同的物理化学相互作用加速堆肥过程中PTEs的钝化,降水,和阳离子交换反应。添加外源钙,堆肥中的镁和磷酸盐可以降低铜等PTE的迁移率,镉,和锌。基于批判性分析,本文提出了一种生态创新的观点,以改进和实际应用堆肥技术来利用农业生物废弃物,以满足循环经济方法并实现可持续发展目标。
    The increasing trend of using agricultural wastes follows the concept of \"waste to wealth\" and is closely related to the themes of sustainable development goals (SDGs). Carbon-neutral technologies for waste management have not been critically reviewed yet. This paper reviews the technological trend of agricultural waste utilization, including composting, thermal conversion, and anaerobic digestion. Specifically, the effects of exogenous additives on the contents, fractionation, and fate of phosphorus (P) and potentially toxic elements (PTEs) during the composting process have been comprehensively reviewed in this article. The composting process can transform biomass-P and additive-born P into plant available forms. PTEs can be passivated during the composting process. Biochar can accelerate the passivation of PTEs in the composting process through different physiochemical interactions such as surface adsorption, precipitation, and cation exchange reactions. The addition of exogenous calcium, magnesium and phosphate in the compost can reduce the mobility of PTEs such as copper, cadmium, and zinc. Based on critical analysis, this paper recommends an eco-innovative perspective for the improvement and practical application of composting technology for the utilization of agricultural biowastes to meet the circular economy approach and achieve the SDGs.
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  • 文章类型: Journal Article
    废水是可持续化肥生产的重要资源,特别是在氮(N)和磷(P)的回收中。这项全面的研究探讨了回收链,从技术到最终产品的再利用。生物质生长是最具成本效益的方法,节省高达95%的营养素,虽然面临安全问题。各种技术能够回收100%的P和高达99%的N,但由于铵盐的高溶解度,在最终产物结晶过程中出现了挑战。在这些技术中,化学沉淀和氨汽提/吸收已实现完全商业化,估计回收成本分别为6.0-10.0欧元kgP-1和4.4-4.8英镑kgN-1。整合生物质热化学处理和P和/或N的多种技术也达到了技术准备水平TRL=9。然而,由于对废物衍生产品的监管日趋成熟,并不是所有的产品都是市售的。废水的非均质性质将杂质引入到营养物回收产物中。虽然钙和铁杂质可能会影响产品的生物利用度,一些全面的P回收技术提供含有这种混合物的产品。与合成肥料相比,回收的矿物质养分形式已显示出高达60%的产量生物量增长。生命周期评估研究证实了从废水到农业应用的养分回收的积极环境结果。新技术的整合可能会使废水处理成本增加几个百分点,但这可以通过可再生能源利用和回收产品的销售来抵消。此外,通过生物电化学过程同时进行营养回收和能量生产有助于实现碳中和。跨学科合作对于抵消能源和化学品投入至关重要,提高其cos效率并优化技术,并了解各种作物上废水衍生产品的养分释放模式。解决非技术因素,如法律和财政支持,基础设施重新设计,和市场准备,对于成功实施和确保全球粮食生产至关重要。
    Wastewater serves as a vital resource for sustainable fertilizer production, particularly in the recovery of nitrogen (N) and phosphorus (P). This comprehensive study explores the recovery chain, from technology to final product reuse. Biomass growth is the most cost-effective method, valorizing up to 95 % of nutrients, although facing safety concerns. Various techniques enable the recovery of 100 % P and up to 99 % N, but challenges arise during the final product crystallization due to the high solubility of ammonium salts. Among these techniques, chemical precipitation and ammonia stripping/ absorption have achieved full commercialization, with estimated recovery costs of 6.0-10.0 EUR kgP-1 and 4.4-4.8 £ kgN-1, respectively. Multiple technologies integrating biomass thermo-chemical processing and P and/or N have also reached technology readiness level TRL = 9. However, due to maturing regulatory of waste-derived products, not all of their products are commercially available. The non-homogenous nature of wastewater introduces impurities into nutrient recovery products. While calcium and iron impurities may impact product bioavailability, some full-scale P recovery technologies deliver products containing this admixture. Recovered mineral nutrient forms have shown up to 60 % higher yield biomass growth compared to synthetic fertilizers. Life cycle assessment studies confirm the positive environmental outcomes of nutrient recycling from wastewater to agricultural applications. Integration of novel technologies may increase wastewater treatment costs by a few percent, but this can be offset through renewable energy utilization and the sale of recovered products. Moreover, simultaneous nutrient recovery and energy production via bio-electrochemical processes contributes to carbon neutrality achieving. Interdisciplinary cooperation is essential to offset both energy and chemicals inputs, increase their cos-efficiency and optimize technologies and understand the nutrient release patterns of wastewater-derived products on various crops. Addressing non-technological factors, such as legal and financial support, infrastructure redesign, and market-readiness, is crucial for successfully implementation and securing the global food production.
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  • 文章类型: Systematic Review
    Burosumab,一种针对成纤维细胞生长因子23(FGF23)的单克隆抗体,已被批准用于X连锁低磷酸盐血症(XLH)的治疗。我们进行了系统评价,以比较burosumab与常规治疗(磷和骨化三醇)对XLH治疗的疗效和安全性。经过对MEDLINE/PubMed和Embase的全面文献检索,我们发现9项研究纳入分析.评估了偏见的风险,并使用随机效应模型来确定效应大小。临床,生物化学,对治疗前后疾病严重程度的放射学参数进行分析,并以标准化均差(SMD)表示。Burosumab导致磷酸盐体内平衡正常化,肾小管磷酸盐重吸收增加,骨骼病变显著消退(Thacher病总严重程度评分变化SMD:-1.46,95%置信区间[CI]:-1.76至-1.17,p<0.001,畸形改善,血清碱性磷酸酶水平下降[SMD:130.68,95%CI:125.26-136.1,p<0.001]。常规治疗导致所有这些参数的类似改善,但程度较低。在成年人中,burosumab标准化的磷水平(SMD:1.23,95%CI:0.98-1.47,p<0.001),最终的临床改善。Burosumab治疗耐受性良好,只有轻微的治疗相关的不良反应。本综述表明burosumab在改善病方面的潜在作用,畸形,和XLH儿童的成长。鉴于其优越的疗效和安全性,burosumab可能是儿童的有效治疗选择。我们建议进一步研究比较burosumab与XLH儿童和成人的常规治疗。
    Burosumab, a monoclonal antibody directed against the fibroblast growth factor 23 (FGF23), has been approved for the treatment of X-linked hypophosphatemia (XLH). We conducted a systematic review to compare the efficacy and safety of burosumab versus conventional therapy (phosphorus and calcitriol) on XLH treatment. After a comprehensive literature search on MEDLINE/PubMed and Embase, we found nine studies for inclusion in the analysis. Risk of bias was assessed, and a random-effects model was used to determine the effect size. Clinical, biochemical, and radiological parameters of disease severity before and after treatment were analyzed and expressed in standardized mean difference (SMD). Burosumab resulted in normalization of phosphate homeostasis with an increase in renal tubular phosphate reabsorption and significant resolution of skeletal lesions (change in Thacher\'s total rickets severity score SMD: -1.46, 95% confidence interval [CI]: -1.76 to -1.17, p < 0.001, improvement in deformities, and decline in serum alkaline phosphatase levels [SMD: 130.68, 95% CI: 125.26-136.1, p < 0.001)]. Conventional therapy led to similar improvements in all these parameters but to a lower degree. In adults, burosumab normalized phosphorus levels (SMD: 1.23, 95% CI: 0.98-1.47, p < 0.001) with resultant clinical improvement. Burosumab treatment was well tolerated, with only mild treatment-related adverse effects. The present review indicates a potential role for burosumab in improving rickets, deformities, and growth in children with XLH. Given its superior efficacy and safety profile, burosumab could be an effective therapeutic option in children. We suggest further studies comparing burosumab versus conventional therapy in children and adults with XLH.
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  • 文章类型: Journal Article
    背景:减肥手术(BS)是治疗严重肥胖的最有效方法,对血糖控制和代谢结果具有有益作用。然而,BS对营养结局的影响存在争议.因此,我们旨在评估Roux-en-Y胃旁路术(RYGB)后几种营养结局的变化.
    方法:使用以下数据库进行了全面搜索:PubMed,Embase,WebofScience,科克伦图书馆,万方与中国国家知识基础设施。评估了以下结果:维生素A,25-羟基维生素D[25(OH)D],钙,磷,甲状旁腺激素(PTH),铁,铁蛋白,维生素B12,叶酸,和锌。使用随机效应模型将合并结果表示为标准平均差(SMD)和95%置信区间(CI)。
    结果:56项研究包括5645名肥胖个体符合纳入标准。血清25(OH)D(SMD=0.78,95CI0.38至1.20,P<0.001),磷(SMD=0.48,95CI0.22至0.74,P<0.001),PTH(SMD=0.35,95CI0.11至0.59,P=0.005),维生素B12(SMD=1.11,95CI0.41至1.80,P=0.002),与基线相比,RYGB后叶酸(SMD=1.53,95CI0.77至2.28,P<0.001)显着增加。血清铁蛋白(SMD=-1.67,95CI-2.57至-0.77,P<0.001),维生素A(SMD=-0.64,95CI-0.99至-0.29,P<0.001),血浆锌(SMD=-0.58,95CI-1.09至-0.06,P=0.027)在RYGB后明显下降。RYGB后血清钙(SMD=-0.14,95CI-0.40至0.11,P=0.219)和铁(SMD=0.26,95CI-0.11至0.64,P=0.165)均无明显变化。
    结论:尽管25(OH)D的含量增加,磷,维生素B12和叶酸,这项荟萃分析揭示了RYGB治疗后不利的营养后果.
    BACKGROUND: Bariatric surgery (BS) is the most effective treatment for severe obesity and it has beneficial effects on glycemic control and metabolism outcomes. However, the effects of BS on nutritional outcomes are controversial. Therefore, we aimed to evaluate the changes in several nutritional outcomes after Roux-en-Y gastric bypass (RYGB).
    METHODS: A comprehensive search was performed using the following databases: PubMed, Embase, Web of Science, Cochrane Library, WanFang and Chinese National Knowledge Infrastructure. The following outcomes were evaluated: vitamin A, 25-hydroxyvitamin D [25(OH)D], calcium, phosphorus, parathormone (PTH), iron, ferritin, vitamin B12, folate, and zinc. The pooled outcomes were expressed as standard mean difference (SMD) and 95% confidence interval (CI) using a random effects model.
    RESULTS: Fifty-six studies including 5645 individuals with obesity met the inclusion criteria. Serum 25(OH)D (SMD = 0.78, 95%CI 0.38 to 1.20, P < 0.001), phosphorus (SMD = 0.48, 95%CI 0.22 to 0.74, P < 0.001), PTH (SMD = 0.35, 95%CI 0.11 to 0.59, P = 0.005), vitamin B12 (SMD = 1.11, 95%CI 0.41 to 1.80, P = 0.002), and folate (SMD = 1.53, 95%CI 0.77 to 2.28, P < 0.001) significantly increased after RYGB compared with the baseline. Serum ferritin (SMD =  - 1.67, 95%CI - 2.57 to - 0.77, P < 0.001), vitamin A (SMD =  - 0.64, 95%CI - 0.99 to - 0.29, P < 0.001), and plasma zinc (SMD =  - 0.58, 95%CI - 1.09 to - 0.06, P = 0.027) significantly decreased after RYGB. No significant changes in serum calcium (SMD =  - 0.14, 95%CI - 0.40 to 0.11, P = 0.219) and iron (SMD = 0.26, 95%CI - 0.11 to 0.64, P = 0.165) were observed after RYGB.
    CONCLUSIONS: Despite the increased levels of 25(OH)D, phosphorus, vitamin B12 and folate, this meta-analysis revealed the unfavorable nutritional consequences after RYGB.
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  • 文章类型: Journal Article
    由于最近的研究而发生的猪的矿物质营养的一些最大变化是由于理解内源性Ca和P损失到猪的肠道中引起的。这导致了基于标准化总道消化率(STTD)而不是表观总道消化率来制定饮食的概念的发展,因为这些矿物质的STTD值在混合饮食中是添加剂。有,然而,没有关于猪的消化率和宏观和微观矿物质以及维生素D的需求的最新研究摘要。因此,这篇综述的目的是总结过去几十年来为确定饲喂给母猪和生长猪的某些矿物质和维生素D的消化率和需求而进行的一些研究的选定结果.已经证明了微生物植酸酶在增加大多数矿物质的消化率方面的益处。还证明了过量饲喂Ca对猪生长性能的负面影响,对完整饮食和原材料中的Ca进行频繁分析,因此,recommended.没有证据表明断奶或生长肥育猪目前对维生素D的要求是不准确的,但妊娠和哺乳母猪可能需要比目前推荐的更多的维生素D。维生素D类似物和代谢物如1(OH)D3和25(OH)D3在与维生素D3组合添加到母猪的饮食中时具有有益效果。最近对钙和磷以外的大型矿物需求的研究很少,但是,大豆粉含量低的日粮中的Mg可能是微不足道的。与硫酸盐形式相比,一些螯合的微矿物质具有增加的消化率,Cu和Zn的羟基化形式似乎优于硫酸盐或氧化物形式。同样,与硫酸铜相比,氧化二铜和蛋氨酸羟基类似物对生长猪的生长性能具有更大的积极作用。对Mn的需求可能需要增加,而提供高于当前需求的Fe似乎没有益处。总之,猪的饮食应根据Ca和P的STTD值制定,并且在饮食中提供过量的Ca会产生负面影响。维生素D类似物和代谢物可能在母猪饮食中提供超过维生素D3的益处。同样,螯合形式的微矿物质或除硫酸盐或氧化物以外的化学形式的矿物质可能会改善猪的性能。
    Some of the biggest changes in mineral nutrition for pigs that have occurred due to recent research were caused by the understanding that there is a loss of endogenous Ca and P into the intestinal tract of pigs. This resulted in development of the concept of formulating diets based on standardized total tract digestibility (STTD) rather than apparent total tract digestibility because the values for STTD of these minerals are additive in mixed diets. There are, however, no recent summaries of research on digestibility and requirements of macro- and microminerals and vitamin D for pigs. Therefore, the objective of this review was to summarize selected results of research conducted over the last few decades to determine the digestibility and requirements of some minerals and vitamin D fed to sows and growing pigs. Benefits of microbial phytase in terms of increasing the digestibility of most minerals have been demonstrated. Negative effects on the growth performance of pigs of over-feeding Ca have also been demonstrated, and frequent analysis of Ca in complete diets and raw materials is, therefore, recommended. There is no evidence that current requirements for vitamin D for weanling or growing-finishing pigs are not accurate, but it is possible that gestating and lactating sows need more vitamin D than currently recommended. Vitamin D analogs and metabolites such as 1(OH)D3 and 25(OH)D3 have beneficial effects when added to diets for sows in combination with vitamin D3. Recent research on requirements for macrominerals other than Ca and P is scarce, but it is possible that Mg in diets containing low levels of soybean meal is marginal. Some of the chelated microminerals have increased digestibility compared with sulfate forms, and hydroxylated forms of Cu and Zn appear to be superior to sulfate or oxide forms. Likewise, dicopper oxide and Cu methionine hydroxy analog have a greater positive effect on the growth performance of growing pigs than copper sulfate. The requirement for Mn may need to be increased whereas there appears to be no benefits of providing Fe above current requirements. In conclusion, diets for pigs should be formulated based on values for STTD of Ca and P and there are negative effects of providing excess Ca in diets. It is possible vitamin D analogs and metabolites offer benefits over vitamin D3 in diets for sows. Likewise, chelated forms of microminerals or chemical forms of minerals other than sulfates or oxides may result in improved pig performance.
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