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Study design and implementation of a pyrolysis device for the production of fuel and gas from plastic waste 研究设计和实现一种从塑料废物中生产燃料和气体的热解装置
Pub Date : 2022-10-30 DOI: 10.53430/ijsru.2022.4.2.0153
Nahed Hassan Farhoud, Elham Munir Baddour, Isam Mohammed Abdel-Magid
In this study, a local pyrolysis system was created to recover oil from used polypropylene (PP) plastic waste for the production of fuel and gas. The system was initially tested with two kilograms of waste plastic for three hours. This technique displays various sustainable development in terms of energy, using gas as the primary source of heat and using gas created throughout the process as a secondary or auxiliary source to hasten the decomposition process. The reactor chamber's original size could not support the pressure needed for the pyrolysis process. The second experiment was modified to have the following dimensions: height (30 cm), diameter (15 cm), and thickness (5 mm) resulting in a volume of 5301.44 cm3. A volume of one liter of liquid fuel, grease, and gas in various percentages of 80%, 10%, and 10%, respectively, was produced from one kilogram of type (PP) waste. Additionally, the heat pressure inside the chamber rises as the pyrolysis breakdown temperature grows. The research recommends utilizing catalysts in the pyrolysis of (PP) production to reduce the temperature necessary to break the bonds between hydrocarbon molecules. It is necessary to carry out an isolation process for plastic waste before the pyrolysis process. It is preferred to physically treat plastic waste, such as shredding and cutting it into little pieces before using it and depositing it in a pyrolysis device, while also adhering to occupational safety and security regulations.
在这项研究中,建立了一个局部热解系统,从废旧聚丙烯(PP)塑料废物中回收石油,用于生产燃料和天然气。该系统最初用两公斤废塑料进行了三个小时的测试。该技术在能源方面展示了各种可持续发展,使用气体作为主要热源,并使用整个过程中产生的气体作为次要或辅助来源,以加速分解过程。反应器室的原始尺寸无法支持热解过程所需的压力。将第二个实验修改为以下尺寸:高度(30 cm),直径(15 cm)和厚度(5 mm),得到的体积为5301.44 cm3。从一公斤聚丙烯(PP)废料中,分别以80%、10%和10%的不同百分比生产出一升的液体燃料、油脂和气体。此外,随着热解分解温度的升高,腔内的热压也随之升高。该研究建议在(PP)生产的热解过程中使用催化剂,以降低破坏碳氢化合物分子之间键所需的温度。在热解前对塑料废弃物进行隔离处理是必要的。最好对塑料垃圾进行物理处理,如在使用前将其切碎切成小块,并将其放入热解装置中,同时也要遵守职业安全法规。
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引用次数: 0
Use of earthworm (Eisenia fetida) meal as a supplement for feeding tilapia juveniles (Oreochromis niloticus) 使用蚯蚓(Eisenia fetida)粉作为罗非鱼幼鱼(Oreochromis niloticus)的补充饲料
Pub Date : 2022-10-30 DOI: 10.53430/ijsru.2022.4.2.0154
Silvio Cesar Pimentel Russio, Israel Luz Cardoso, Giovanni Henrique Ferri, Larissa Caroline Silva, Julio Ferraz de Queiroz, Marcos Alexandre Ivo, Márcia Mayumi Ishikawa
Earthworm meal comprises a class of food additives with potential to replace or supplement conventional proteins used in fish feed. Considering the potential of earthworm meal, as a protein source for fish feed, this study aimed to investigate the productive performance and the hematological profile of Nile tilapia juveniles fed with a commercial diet enriched with earthworm meal at levels (0.0; 5.0, 10 and 20%). The assay was conducted for 32 days and the productive performance and hematology profile of the animals were evaluated. Tilapia juveniles (n=144; 25.30±3.27g) were distributed in 12 aquariums (300 L) in a static system with partial water changes. The experimental design was completely randomized with four treatments and three replications. There were no significant differences (p>0.05) for performance responses and hematological profile related to variables on hematocrit and CHCM. However, for hemoglobin values the treatment with 20% earthworm meal was similar to the treatments with 5 and 10% earthworm meal, and significantly differed from the control treatment, suggesting its potential as a fish feed supplement. Thus, earthworm meal can be used at 5, 10, and 20% as a supplement for Nile tilapia juveniles without compromising their performance and hematological profile.
蚯蚓粉含有一类食品添加剂,有可能取代或补充鱼饲料中使用的传统蛋白质。考虑到蚯蚓粉作为鱼类饲料的蛋白质来源的潜力,本研究旨在研究尼罗罗非鱼幼鱼在添加(0.0;5.0、10%和20%)。实验进行了32天,并评估了动物的生产性能和血液学特征。罗非鱼幼鱼(n=144;25.30±3.27g),分布在12个水族箱(300 L)中,在局部换水的静态系统中。试验设计完全随机化,4个处理,3个重复。与红细胞压积和CHCM相关变量的性能反应和血液学特征无显著差异(p>0.05)。然而,在血红蛋白值方面,添加20%蚯蚓粉的处理与添加5%和10%蚯蚓粉的处理相似,且与对照处理显著不同,表明其具有作为鱼饲料补充的潜力。因此,蚯蚓粉可以在5%、10%和20%的比例下作为尼罗罗非鱼幼鱼的补充,而不会影响它们的生产性能和血液学特征。
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引用次数: 0
Risk factors associated with salmonella prevalence among food vendors in southern Taraba, north-east, Nigeria 尼日利亚东北部塔拉巴南部食品摊贩中沙门氏菌流行的相关风险因素
Pub Date : 2022-10-30 DOI: 10.53430/ijsru.2022.4.2.0161
Edobor Peter Kenneth Imarenezor, Onolunosen Abel Abhadionmhen, Samuel Tamuno Cockeye Brown
Humans are active and asymptomatic carriers of Salmonella and food vendors play a significant role in the effective transmission of the food pathogen. This research investigated the prevalence of Salmonella along with its associated risk factors among food vendors in Donga, Ibi, Takum, and Wukari towns. Using standard microbiological procedures and techniques, blood and stool samples was obtained from 200 mobile and stationed food vendors. Upon analysis, 22 out of the collected samples were positive giving a record prevalence of 11%. Six (6) (Donga 0; Ibi 3; Takum 1; Wukari 2) of the positive samples were of the Typhoidal serovar. Apart from Ibi and Takum which recorded 4 positive cases each from the 16 isolated Non-Typhoidal Salmonella (NTS) from food handlers, the highest (5) isolates were from Donga, while the lowest was from Wukari with a total of 3 positive isolates. Poor food-handling training as well as unprofessional food handling attitude and practices observed among food handlers were identified as significant risk factors associated with the prevalence of Salmonella infection among this population. Hence, deliberate efforts should be initiated by Local Health Authorities in regulating the activities of food vendors by way of periodic medical screening of food handlers. Also, community-driven health promotion practices including behavioral change communication geared towards preventing microbial contamination of foods should be considered.
人类是沙门氏菌的活跃和无症状携带者,食品供应商在食品病原体的有效传播中起着重要作用。本研究调查了Donga、Ibi、Takum和Wukari镇食品供应商中沙门氏菌的流行情况及其相关危险因素。使用标准的微生物程序和技术,从200个流动和驻扎的食品摊贩那里获得了血液和粪便样本。经分析,收集的样本中有22个呈阳性,患病率为11%。6(东亚0;Ibi 3;Takum 1;阳性样本中Wukari 2型为伤寒血清型。从食品处理人员分离出的16株非伤寒沙门氏菌中,除伊必和塔库姆各有4株阳性外,东亚地区分离株最多(5株),乌卡里地区分离株最少(3株)。在食品处理人员中观察到的不良食品处理培训以及不专业的食品处理态度和做法被确定为与该人群中沙门氏菌感染流行相关的重要风险因素。因此,地方卫生当局应慎重努力,通过定期对食品处理人员进行医疗检查来规范食品摊贩的活动。此外,应考虑社区驱动的健康促进做法,包括旨在防止食品微生物污染的行为改变沟通。
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引用次数: 0
Spatio-temporal variation of bacteria of the Vibrio and Pseudomonas genera in some underground water points developed in the locality of Ombessa (Department of Mbam-et-Inoubou, Center-Cameroon) Ombessa地区(喀麦隆中部mbamet - inouou省)地下水点弧菌属和假单胞菌属细菌的时空变化
Pub Date : 2022-10-30 DOI: 10.53430/ijsru.2022.4.2.0144
Samuel-Davy/ Baleng, Olive- Vivien-Noah/Ewoti, Serge- Ronny-Ott/ Song, Claire-Stéphane /Metsopkeng, Morelle-Raisa- Tagne /Djiala, Maximillienne- Ascencion/Nyegue, Moïse Nola
A study aimed at evaluating the seasonal variation of Vibrio and Pseudomonas in groundwater in the city of Ombessa, Center region of Cameroon was conducted from January to July 2021. The microorganisms sought were Aerobic Mesophilic Bacteria BHAMs, bacteria of the Vibrio and Pseudomonas genera. These bacteria were isolated from 10 groundwater points by the surface spreading technique for BHAM and the membrane filter method for Vibrio and Pseudomonas. Plate count agar was used for BHAMs, TCBS medium for Vibrio and Cetrimide agar for Pseudomonas. Some abiotic parameters such as temperature, pH, were measured using the usual techniques. The data obtained was analyzed using the appropriate software. Correlation and comparison tests between the variables were carried out. It shows that the water studied has a pH of 5.94 UC to 7.9 UC, the content of dissolved O2 reached 5 mg/L, and there are positive and significant correlations between the density of isolated bacteria and the levels of physicochemical variables. Two species of the genus Pseudomonas (aeruginosa and fluorescens) and four of the genus Vibrio (cholerea, alginolyticus, vulnificus and parahaemolyticus) were isolated, with variable abundance rates ranges from 194 to 898 CFU/100mL for Pseudomonas and from 58 to 683 CFU/100mL for Vibrio. The presence of these germs in groundwater can be explain by the proximity of sources of pollution. This water would be unfit for human consumption without prior treatment according to the World Health Organization standard.
于2021年1月至7月对喀麦隆中部地区奥姆贝萨市地下水中弧菌和假单胞菌的季节性变化进行了研究。所寻找的微生物是好氧中温细菌BHAMs,弧菌属和假单胞菌属的细菌。采用BHAM的表面扩散技术和弧菌和假单胞菌的膜过滤法对10个地下水点进行了分离。bham用平板计数琼脂,弧菌用TCBS培养基,假单胞菌用Cetrimide琼脂。一些非生物参数,如温度,pH值,用通常的技术测量。用相应的软件对所得数据进行分析。进行了变量间的相关检验和比较检验。结果表明,所研究的水体pH为5.94 UC ~ 7.9 UC,溶解O2含量达到5 mg/L,分离细菌密度与理化变量水平呈正相关。其中假单胞菌属2种(铜绿单胞菌和荧光单胞菌),弧菌属4种(霍乱菌、溶藻菌、创伤菌和副溶血性弧菌),假单胞菌的丰度为194 ~ 898 CFU/100mL,弧菌的丰度为58 ~ 683 CFU/100mL。地下水中这些细菌的存在可以用污染源的邻近来解释。如果不按照世界卫生组织的标准事先处理,这些水将不适合人类饮用。
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引用次数: 0
Rubella-specific IgG antibodies in non-pregnant women in Rivers State, Nigeria 尼日利亚河流州非孕妇风疹特异性IgG抗体
Pub Date : 2022-10-30 DOI: 10.53430/ijsru.2022.4.2.0130
Chisom Chimbundum Adim, Hope Chioma Innocent-Adiele, Ngozi Nma Odu, Iheanyi Omezuruike Okonko
Background: Rubella is a contagious virus-borne disease. The study aimed to test a cohort of non-pregnant women in Rivers State for rubella virus IgG antibodies and identify their susceptibility to the viral infection. Methods: The study included 92 consenting non-pregnant women attending Rivers State University Teaching Hospital in Rivers State. The sera were evaluated for detectable anti-rubella IgG antibodies using ELISA kits according to the manufacturer's instructions. Results: Eighty-five (92.4 per cent) of the 92 samples tested positive for rubella Immunoglobulin G antibodies, while 7 (7.6 per cent) tested negative. Rubella IgG seroprevalence was unrelated to age, education, or occupation. Conclusion: Given the high level of rubella IgG among non-pregnant women tested in Rivers State, it is likely that the virus is prevalent in the research area. As a result, a robust surveillance system and the organization of screening for anti-rubella IgG antibodies in pregnant women would be critical for future protection against the illness.
背景:风疹是一种传染性病毒传播疾病。该研究旨在测试河流州一组未怀孕妇女的风疹病毒IgG抗体,并确定她们对病毒感染的易感性。方法:研究纳入了92名在河流州立大学教学医院住院的非怀孕妇女。根据制造商的说明,使用ELISA试剂盒评估血清是否可检测到抗风疹IgG抗体。结果:92个样本中85个(92.4%)风疹免疫球蛋白G抗体检测呈阳性,7个(7.6%)检测呈阴性。风疹IgG血清阳性率与年龄、教育程度和职业无关。结论:鉴于在河流州检测的未怀孕妇女中风疹IgG水平较高,该病毒很可能在研究地区流行。因此,一个强有力的监测系统和组织筛查孕妇抗风疹IgG抗体对未来预防该疾病至关重要。
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引用次数: 0
Dual positivity of HIV and anti-HCV in the highly infected population of Rivers State, Nigeria 尼日利亚河流州高感染人群中艾滋病毒和抗丙肝病毒双重阳性
Pub Date : 2022-10-30 DOI: 10.53430/ijsru.2022.4.2.0072
Iheanyi Omezuruike Okonko, Tochi Ifeoma Cookey, Hope Chioma Innocent-Adiele
The study looked to establish dual positivity of human immunodeficiency virus (HIV) and anti-hepatitis C virus (HCV) antibody among HIV-infected individuals in Port Harcourt, Nigeria. Plasma samples from 89 HIV-infected individuals presenting at the Retroviral Clinic of the University of Port Harcourt Teaching Hospital (UPTH), Rivers State, Nigeria, were assayed for anti-HCV-antibody. Seropositivity of anti-HCV-antibody was detected with ELISA kits. Variables tested include sex, age group, educational status, marital status and occupation. Significant variance (p<0.05) existed between patients with mono-HIV infection and those with dual infection of HIV and HCV. Of these infections, 20(22.5%) had HIV and HCV dual infection, while 69(77.5%) had HIV mono-infection. Higher seroprevalence of HIV was found in females [65(73.0%)] than males [24(27.0%)]. The highest seroprevalence of HIV was found in the age group 41-60 years [41(46.1%)], and the age-group 20-30 years had the least prevalence [19(21.3%)]. Also, females had higher HIV and HCV dual positivity (23.1%) than males (20.8%). The age group 31-40 years in this study had the highest HIV and HCV dual positivity (34.5%), while the age group 41-60 years had the lowest prevalence (12.2%). Regarding marital status, singles constituted most study participants and had a dual positivity rate of 28.6% for HIV and HCV. This dual positivity was higher than those divorced and married, with 20.0% and 14.3% prevalence, respectively. Patients with tertiary education (27.3%) and those employed (41.2%) had a higher prevalence than others. None of these demographic characteristics was significantly associated with HIV-HCV dual positivity (p>0.05) except for occupations (p=0.04). Our study further confirms the dual positivity of HIV and anti-HCV in Rivers State, Nigeria. Planned prevention, screening, and treatment are required to reduce further transmission and morbidity.
该研究试图在尼日利亚哈科特港的HIV感染者中建立人类免疫缺陷病毒(HIV)和抗丙型肝炎病毒(HCV)抗体的双重阳性。对在尼日利亚河流州哈科特港大学教学医院逆转录病毒诊所就诊的89名hiv感染者的血浆样本进行了抗hcv抗体检测。采用ELISA试剂盒检测血清抗hcv抗体阳性。测试的变量包括性别、年龄、教育程度、婚姻状况和职业。除职业(p=0.04)外,显著差异(p0.05)。我们的研究进一步证实了尼日利亚河流州的HIV和抗hcv双重阳性。需要有计划的预防、筛查和治疗,以减少进一步的传播和发病率。
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引用次数: 1
LC-MS analysis and free radical scavenging activity of extracts from Anogeissus leiocarpus (DC.) Guill. & Perr. and Sansiviera liberica Gerome & Labroy 黑果提取物的LC-MS分析及自由基清除活性研究Guill。&穗青葱。以及Sansiviera liberica Gerome & Labroy
Pub Date : 2022-09-30 DOI: 10.53430/ijsru.2022.4.1.0060
Oloyede GK, Oluwayelu DO, Onocha PA, Oyelola M, Spiteller M
Anogeissus leiocarpus and Sansiviera liberica are plants used in traditional medicine as antiviral agents. A preliminary study of the bioactive constituents was carried out using Liquid Chromatography – Mass Spectrometry (LC-MS) technique. Free radical scavenging activity of the crude extracts were determined using 2,2-diphenyl picrylhydrazyl radical method. Results obtained showed that Anogeissus leiocarpus and Sansiviera liberica were rich in alkaloids and their glycosides. Methanol extract of stem of Anogeissus leiocarpus (MSAL) at 1.0 mg/mL was more active than methanol extract of the twig of Sansevieria liberica (MTSL) with %inhibition of 79.5% and 78.1% respectively in the free radical scavenging assay. These activities were significant when compared with butylated hydroxylanisole and ascorbic acid. This study has given a clue to the traditional application of these two plants as antiviral agents in ethnomedicine.
平栎属植物和白鹤属植物是传统医学中常用的抗病毒药物。采用液相色谱-质谱联用技术对其生物活性成分进行了初步研究。采用2,2-二苯基苦基肼基自由基法测定粗提物对自由基的清除活性。结果表明,青果和白鹤中含有丰富的生物碱及其苷类成分。在1.0 mg/mL浓度下,Anogeissus leiocarpus (MSAL)茎甲醇提取物对自由基的抑制率分别为79.5%和78.1%,比Sansevieria liberica (MTSL)细枝甲醇提取物对自由基的抑制率高。与丁基羟基茴香酸和抗坏血酸相比,这些活性显著。本研究为这两种植物作为抗病毒药物在民族医药中的传统应用提供了线索。
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引用次数: 0
A field and laboratory study for effect of heat on some chemical properties of soils of Northeastern of Libya 热对利比亚东北部土壤某些化学性质影响的田间和室内研究
Pub Date : 2022-09-30 DOI: 10.53430/ijsru.2022.4.1.0136
Eldiabani Gibrel Salah, Hale William H.G, Heron Carl P
Libya is one of semi-arid regions in the world except in a small area called (Aljabal Alakhdar) forests. It is the only wet area in Libya. This region exposing to encroachments such as burning parts of it to convert trees to charcoal trees and other purposes. The aim of this study is to evaluate the effects of heat on chemical properties of soil of Aljabal Alakhdar. The chemical properties of soil following heat in two geographic areas were determined in one coastal (old burned) and one mountain site (recently burned). The properties studied were: soil moisture content, soil particle size, soil electrical conductivity (EC), soil pH and soluble Na, K, Ca and Mg, a soluble Cl, HCO3 and SO4. The results showed except for the soil particle size, heat has a clear effect on the soils in the two studied areas. It is particularly interesting to note that many of the results when assessed by ANOVA, showed these properties were affected by heat and very few of the data sets proved to be showing no or low significance due to the effect of heat. This is still true at the coastal site even though the burned area there affected by heat several years ago. However, the affected parameters showed a recovery towards unburned levels with time, being less strongly different in the coastal site than in the mountain site. Many of these effects are pronounced in the upper soil layer, reflecting the rapid decline in temperatures with soil depth.
利比亚是世界上半干旱地区之一,除了一小块叫做Aljabal Alakhdar的森林。这是利比亚唯一潮湿的地区。这一地区受到侵犯,如焚烧部分地区以将树木转化为木炭树和其他目的。本研究的目的是评价热对Aljabal Alakhdar土壤化学性质的影响。测定了两个地理区域的土壤热后化学性质,一个是沿海地区(旧的燃烧),一个是山区(最近的燃烧)。研究的性状包括:土壤含水量、土壤粒径、土壤电导率、土壤pH和可溶性Na、K、Ca、Mg、可溶性Cl、HCO3和SO4。结果表明,除土壤粒径外,热对两个研究区土壤均有明显影响。特别有趣的是,当通过方差分析评估时,许多结果显示这些属性受到热量的影响,并且很少有数据集证明由于热量的影响而显示不显着或低显着。沿海地区的情况仍然如此,尽管那里的燃烧区域几年前就受到了高温的影响。然而,随着时间的推移,受影响的参数显示出向未燃烧水平的恢复,沿海站点的差异不如山区站点的差异那么强烈。许多这些影响在上层土壤中表现明显,反映了温度随土壤深度的迅速下降。
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引用次数: 0
Factors influencing generation of domestic solid wastes in Kisii Town, Kenya 肯尼亚Kisii镇影响生活固体废物产生的因素
Pub Date : 2022-09-30 DOI: 10.53430/ijsru.2022.4.1.0057
Naftal Omonywa Mecheo
Domestic solid waste management (DSW) has been a critical problem in many urban centres in developing countries, including in middle sized towns. This paper investigates the factors influencing the generation of domestic solid waste in residential estates of Kisii town. The specific objective of the study included: to investigate the factors influencing the generation of DSW in residential estates in Kisii town. A mixed methodology approach was taken into consideration. A data sample of 110 households was obtained using the multi stage stratified sampling method from a target population of 20,000 households. Data collection methods of the sampled size involved the use of questionnaires to the householders and direct interviews to county officers in charge of DSW and observation integrated with photography. Data analysis was carried out using methods such as use of tables, use of graphs through SPSS, and other descriptive statistics such as the use of the measures of central tendency were taken into consideration. The results found that various factors including the size of the family 83.7% and the level of income 9.7% influenced the generation of domestic solid waste in the residential areas. In conclusion various factors influence the generation of DSW and the major one is family size. It is therefore recommended that, residents should be sensitized to purchase and cook what they can consume to reduce the excesses which surmount to DSW especially food remains.
在发展中国家的许多城市中心,包括中型城镇,家庭固体废物管理一直是一个关键问题。对基思镇住宅小区生活垃圾产生的影响因素进行了研究。研究的具体目的包括:调查影响基思镇住宅小区DSW产生的因素。考虑了一种混合方法。采用多阶段分层抽样方法,从目标人口2万户中抽取110户数据样本。样本量的数据收集方法包括对户主进行问卷调查和对县负责DSW的官员进行直接访谈,并结合摄影观察。数据分析使用的方法,如使用表格,通过SPSS使用图形,以及其他描述性统计,如使用集中趋势的措施被考虑在内。结果发现,家庭规模(83.7%)和收入水平(9.7%)等各因素对居民区生活垃圾产生量产生影响。综上所述,影响DSW产生的因素多种多样,家庭规模是影响DSW产生的主要因素。因此,我们建议市民应注意购买和煮煮他们可以食用的食物,以减少过量的废物,特别是食物残渣。
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引用次数: 0
Every month: The result of premenstrual dysmorphic disorders 每月:经前畸形障碍的结果
Pub Date : 2022-09-30 DOI: 10.53430/ijsru.2022.4.1.0127
Edna Aurelus
Methods: Research was conducted using self-experience along with scientific literature findings to fully understand the physical and emotional syndromes of premenstrual dystrophic disorders (PMDD). Findings: Correlation with low progesterone in relation to negative affective and physical symptoms during the follicle and luteal phase were observed. Allopregnanolone, a neurosteroid, as a therapeutic agent can alleviate PMDD symptoms. Specific nutritional sources can also help alleviating the presenting symptoms. Conclusion: Awareness about PMDD symptoms is warranted in women experiencing them. Providers need to be familiar of the emotional and physical effect of low progesterone and the mechanism of action of Allopregnanolone in treating PMDD, when other interventions such as psychotherapy and other pharmacological intervention failed.
方法:采用自我体验法结合科学文献研究,全面了解经前营养不良障碍(PMDD)的生理和情绪症状。结果:在卵泡期和黄体期观察到与低孕酮相关的负面情绪和身体症状。异孕酮,一种神经类固醇,作为治疗药物可以减轻经前抑郁症的症状。特定的营养来源也可以帮助缓解症状。结论:女性对经前不悦症的认识是必要的。当其他干预措施如心理治疗和其他药物干预失败时,提供者需要熟悉低孕酮对情绪和身体的影响以及异孕酮治疗经前抑郁症的作用机制。
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引用次数: 0
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International Journal of Scientific Research Updates
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