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  • Effects of incremental peritoneal dialysis in patients with urgent-start peritoneal dialysis

    Subjects: Medicine, Pharmacy >> Clinical Medicine submitted time 2024-01-09

    Abstract: Objective: To observe the feasibility and effects of the incremental peritoneal dialysis in patients receiving urgent-start peritoneal dialysis. Methods: This is a single-center retrospective study. ESRD patients who received urgent-start peritoneal dialysis from August 1st2018 through July 31st2021 at the first affiliated hospital of Xi'an Jiaotong University were enrolled to this study. The estimated glomerular filtration rate (eGFR) of all patients was between 4 ~ 6ml/min/1.73m2.According to the difference in the initial dialysis dose, recruited patients were divided into an incremental PD group: initial dialysis dose less than or equal to 6000mlper day, with the dialysis dose being adjusted according to the RRF and dialysis adequacy, and a full-dose PD group: dialysis dose more than or equal to 8000ml per day. Patients were followed-up for 1 year. Clinical biochemical indices, dialysis dose, dialysis adequacy, urine volume, dialysis ultra-filtration volume, residual renal function and peritoneal dialysis-related complications were recorded when peritoneal dialysis was performed at 1,3, and 6-months and 1year. Results: 1. This study examined 169 patients, of which, 111 patients with a mean age of 45.01±12.84 years were in the incremental PD group and 58 patients with a mean age of 43.5±15.62 years were in the full-dose PD group. The demographics, the clinical biochemical indices and residual renal function of both groups before peritoneal dialysis were similar(P>0.05). 2. During follow-up, the dialysis dose in the full-dose PD group exceeded that of the incremental PD group (P<0.05). However, the total Kt/V for both groups exceeded 1.7, and the total Ccr was greater than 50L. At 1 and 6 months, the urine Kt/V in the incremental PD group was higher than that found in the full-dose PD group (P<0.05). 3.During the whole follow-up period, blood pressure control, correction of anemia, and correction of hypocalcemia were also similar for both groups (P>0.05).The correction of hyperphosphatemia in both groups reached the standard.4. During the follow-up period, the residual renal function in both group were similar (P>0.05). The dialysis ultra-filtration volume in the full-dose PD group exceeded that of the incremental PD group, but the differences were not statistically significant (P>0.05).The urine volume of the incremental PD group were significantly higher than that of the full-dose PD group, especially at 1 month and 6 months of dialysis(P<0.05). 5. During the entire follow-up, no patient died in either group. The peritoneal dialysis-related infection, mechanical complications and technical survival rate were similar between groups (P>0.05). Conclusions: The dialysis effect and complications from incremental PD, were similar to full-dose peritoneal dialysis. Incremental PD did not cause a rapid decline of residual renal function in USPD patients. Therefore, USPD patients can be treated by incremental peritoneal dialysis.

  • Effects of incremental peritoneal dialysis in patients with urgent-start peritoneal dialysis

    Subjects: Medicine, Pharmacy >> Clinical Medicine submitted time 2023-12-30

    Abstract: Objective: To observe the feasibility and effects of the incremental peritoneal dialysis in patients receiving urgent-start peritoneal dialysis. Methods: This is a single-center retrospective study. ESRD patients who received urgent-start peritoneal dialysis from August 1st2018 through July 31st2021 at the first affiliated hospital of Xi'an Jiaotong University were enrolled to this study. The estimated glomerular filtration rate (eGFR) of all patients was between 4 ~ 6ml/min/1.73m2.According to the difference in the initial dialysis dose, recruited patients were divided into an incremental PD group: initial dialysis dose less than or equal to 6000mlper day, with the dialysis dose being adjusted according to the RRF and dialysis adequacy, and a full-dose PD group: dialysis dose more than or equal to 8000ml per day. Patients were followed-up for 1 year. Clinical biochemical indices, dialysis dose, dialysis adequacy, urine volume, dialysis ultra-filtration volume, residual renal function and peritoneal dialysis-related complications were recorded when peritoneal dialysis was performed at 1,3, and 6-months and 1year. Results: 1. This study examined 169 patients, of which, 111 patients with a mean age of 45.01±12.84 years were in the incremental PD group and 58 patients with a mean age of 43.5±15.62 years were in the full-dose PD group. The demographics, the clinical biochemical indices and residual renal function of both groups before peritoneal dialysis were similar(P>0.05). 2. During follow-up, the dialysis dose in the full-dose PD group exceeded that of the incremental PD group (P<0.05). However, the total Kt/V for both groups exceeded 1.7, and the total Ccr was greater than 50L. At 1 and 6 months, the urine Kt/V in the incremental PD group was higher than that found in the full-dose PD group (P<0.05). 3.During the whole follow-up period, blood pressure control, correction of anemia, and correction of hypocalcemia were also similar for both groups (P>0.05).The correction of hyperphosphatemia in both groups reached the standard.4. During the follow-up period, the residual renal function in both group were similar (P>0.05). The dialysis ultra-filtration volume in the full-dose PD group exceeded that of the incremental PD group, but the differences were not statistically significant (P>0.05).The urine volume of the incremental PD group were significantly higher than that of the full-dose PD group, especially at 1 month and 6 months of dialysis(P<0.05). 5. During the entire follow-up, no patient died in either group. The peritoneal dialysis-related infection, mechanical complications and technical survival rate were similar between groups (P>0.05). Conclusions: The dialysis effect and complications from incremental PD, were similar to full-dose peritoneal dialysis. Incremental PD did not cause a rapid decline of residual renal function in USPD patients. Therefore, USPD patients can be treated by incremental peritoneal dialysis.

  • The behavioral effects of nudge: A meta-analysis based on a dual perspective of “Cognitive Pathway” and “Transparency”

    Subjects: Other Disciplines >> Synthetic discipline submitted time 2023-10-09 Cooperative journals: 《心理科学进展》

    Abstract: Challenges faced by nudges in practice have prompted scholars to reflect on effectiveness and applicable conditions of nudge. A common approach is to conduct meta-analyses on the results of behavioral intervention experiments involving nudges. However, existing meta-analyses have significant limitations. On one hand, due to differences in the selection of effect size indicators, the results of different meta-analyses lack comparability, preventing a comprehensive view of the overall effects of various nudging tools across common behavioral domains. On the other hand, most existing meta-analyses categorize nudges based on the “MINDSPACE” framework, which does not encompass all nudge interventions.Drawing inspiration from Hansen and Jespersen (2013), this study establishes an analytical framework from a dual perspective of cognitive pathway and transparency, encompassing commonly used nudging interventions in practice. Based on this framework, a meta-analysis is conducted to compare the differences in effectiveness across nudge categories, providing a comprehensive and objective evaluation of the real effects of nudges under different cognitive pathways and levels of transparency. This helps address academic disputes regarding the effectiveness of nudges under different cognitive pathways and transparency levels.This study focuses on the effectiveness of nudge in the actual policy domain, conducting a meta-analysis on nudge intervention experimental research published in the two professional journals: Behavioural Public Policy (2017-2022) and Behavioral Science & Policy (2015-2022). Using the standardized mean difference (Cohen's d) as an effect size index, Comprehensive Meta Analysis 2.0 is employed to calculate the effect size. All articles published in these two journals were included (a total of 330) in our sample frame, and a thorough reading of the full text was used to screen the literature one by one. The experimental data included in the meta-analysis had to meet the calculation requirements of CMA 2.0, containing basic statistical data such as means, standard deviations, t-values, and F-values. After screening, 40 sample articles were ultimately selected, yielding 108 research results. Considering the differences in research sample sizes, a random effects model was applied to calculate the overall effect of nudging, and then compare the effectiveness of nudges that work through different cognitive pathways and are presented with different levels of transparency. Subsequently, a regression analysis model is established using SPSS25 to test the effects of three classes of heterogeneity factors (research design, behavioral characteristics, and behavioral domains) with eight variables (sample size, field experiment, data type, behavioral motivation, monetary change, health, consumption, finance, public interest) on nudging intervention effects; Finally, an interaction regression analysis model is constructed to analyze the interactions between nudge cognitive pathways, transparency, and heterogeneity factors.The results showed that: (1) Nudge research in the field of behavioral public policy has a relatively small overall effect and still faces the risk of failure in practice. (2) Transparent nudges can also be effective in guiding people to change their behaviour, and there is an interactive effect between different nudges that work through different cognitive pathways and are presented with different levels of transparency. (3) The effects of nudges are influenced by study design and vary across different behavioral domains. (4) Complex interactions are observed between the cognitive pathways through which nudges operate, the transparency of nudge design, and the factors affecting effect size heterogeneity.The academic contributions of this paper are: (1) By conducting a meta-analysis on nudge behavioral effects from the dual perspectives of “cognitive pathway” and “transparency”, this research helps separate the actual effects of various psychological cognitive processes and intervention techniques, aiding in forming an objective understanding of the real effectiveness of different types of nudges. (2) Evaluating the effects and differences of various nudges, which not only addresses the academic debate on whether nudge designs should be transparent but also compares the differences in the effects of two cognitive pathways on behavior change, providing empirical evidence for the selection of nudging tools in subsequent policy practices. (3) This study's analysis of the root causes of heterogeneity in nudge effects enriches the literature on the factors influencing nudge effectiveness and applicable conditions, promoting the accumulation of knowledge in the field of behavioral public policy.

  • 基于深度学习的融合媒体新闻推送技术应用研究

    Subjects: Digital Publishing >> New Media submitted time 2023-10-08 Cooperative journals: 《中国传媒科技》

    Abstract:现阶段互联网以及移动互联网得到了广泛的应用,在这样的背景下,人们能够获取更加丰富的信息,同时信息过载的问题也在逐渐加重。在搜索引擎之后,推荐引擎发展成为当下的重要工具。但当前阶段仍然缺少能够适宜全范围应用的推荐系统,应用相同的算法在不同环境中展开计算,最终获取的结果也存在相应的不同。近些年来,人工技术呈现出了良好的发展态势,在这样的背景下,深度学习在图像识别以及自然语言处理等相关领域的应用获取了较为良好的成果。本文主要研究的是深度学习融合新闻推送技术在实际当中的应用。

  • 基于媒介融合背景下新媒体技术在电视新闻节目中的应用策略研究

    Subjects: Digital Publishing >> New Media submitted time 2023-10-08 Cooperative journals: 《中国传媒科技》

    Abstract:随着信息技术的不断发展与普及,我国已经进入一个全新的信息时代,新兴媒体技术的发展对传统媒体技术带来巨大的冲击,各个媒体之间的竞争在信息时代背景下也越发激烈。与网络媒体技术相较,电视新闻节目的发展受到一定的制约,社会大众受自身猎奇心理的影响,传统媒体技术已经无法满足当前我国社会大众群体对新兴媒体技术的追求。由此可见,基于现代媒介融合背景下,电视新闻等传统媒体技术的革新与发展已经成为提升自身竞争优势的重要途径,更是推进自身领域生存发展的核心举措。本文主要分析媒介融合背景下广播新闻应用新媒体的难点,重点对广播新闻在媒介融合背景下应用新媒体地有效路径进行探究。

  • Embedded Information Literacy Education Pattern Research in CQU Library

    Subjects: Library Science,Information Science >> Library Science submitted time 2023-08-27 Cooperative journals: 《图书情报工作》

    Abstract: [Purpose/significance] University library is one of the important strength for knowledge discovery and scientific and technological innovation and an important base of cultivating high-quality innovative talents. The development of embedded information literacy education in university library is the basic need of personnel training and also the basic requirement of national development strategy.[Method/process] By analyzing the current situation of embedded information literacy education in university libraries, taking the practice case of the CQU Library as the starting point, it studies education subjects, education platform and education objects of information literacy, trying to establish a multi-level, multi-angle, multi-channel and three-dimensional embedded information literacy education model.[Result/conclusion] The university library should construct professional education team, student service team and school-society coordinated education team, and establish embedded teaching platform that combines both online and offline collaborative promotion and teaching, learning and research. At the same time, according to different teaching object, establishing the long term embedded academic career education mechanism and advanced embedded information literacy education mechanism, construct embedded information literacy education "three-all" mode covering the all staff, all around and all process, and continuously promote the level, ability and quality of the embedded information literacy education in Chinese university libraries.

  • The behavioral effects of nudge: A meta-analysis based on a dual perspective of Cognitive Pathway and Transparency

    Subjects: Psychology >> Other Disciplines of Psychology submitted time 2023-08-19

    Abstract: Based on the dual perspective of cognitive pathway and transparency , this research conducts a meta-analysis of 108 empirical results from 40 nudge studies published in Behavioral Public Policy(2017~2022) and Behavioral Science & Policy(2015~2022). This research systematically evaluates the effectiveness of nudging interventions, compares advantages of nudging measures in terms of different cognitive pathways and transparency, explores the influencing factors of heterogeneity in nudging effects, and analyzes the interactive effects of cognitive pathways, transparency, and influencing factors on nudging effectiveness. Our analysis reveals that:(1)The comprehensive effect of nudging intervention is relatively small, and the effect of nudging tools in different studies shows significant differences;(2)There are differences in nudging effectiveness between different cognitive pathways and transparency, and there is an interactive effect between cognitive pathway and transparency on nudging effectiveness;(3)The effectiveness of nudge is influenced by research designs and behavioral domains. The cognitive pathways through which nudge works, the transparency of nudge design, and influencing factors of heterogeneity have complex interactive effects on nudging effectiveness.

  • 公共图书馆研学旅行服务的价值认知与对策思考

    Subjects: Other Disciplines >> Synthetic discipline submitted time 2023-03-31 Cooperative journals: 《农业图书情报学报》

    Abstract: [Purpose/Significance] Under the background of integration of culture and tourism, and with the development of the concept of all-around education, to carry out study tour service in public libraries will bring a new opportunity for public libraries to promote librarianship. There is a close connection between study tour and public libraries. A public library's taking part in the study tour is based on its functional objective as well as its objective to meet the requirements of modern education.It is an effective way for students to learn based on a lot of research in and out of China, while there are still some problems to face. [Method/process]This paper analyzes the current situation of public libraries' study tour service such as rich source, remarkable service achievement, functional goals and service modes of the libraries by literature review and online survey on education and public library services. Meanwhile it also gives brief introduction on the integrated theories and case study of the study tour service in Japan's public libraries, pointing out that the study tour service is consistent with the service of public libraries as well as accordant with education concept. There are still some challenges to overcome such as out-of-date ideas, the lack of in-depth study on theoretical understanding about study tour service and regulations, the lack of top-level design and practical preparation of the service projects that hinders the high-quality development of the study tour service. [Result/conclusion] Public libraries should adhere to the educational principle of study tour, based on their service functions and resource characteristics, highlight the concept of shared development, as well as innovation path about study tour services in public libraries. Public libries can achieve their long-term development in the future by insisting on their original intention of carrying out study tour service, obeying to the government guidance, innovating promotion forms, enriching supply content, promoting the space reconstruction, building brand and evaluation mechanism, extending more service chain, constructing service ecology, improving evaluation system, strengthening cooperation between libraries, schools and other social institutions, building a theoretical system of study tour service, as well as improving service efficiency.

  • Detection and Grading Method of Pomelo Shape Based on Contour Coordinate Transformation and Fitting

    Subjects: Agriculture, Forestry,Livestock & Aquatic Products Science >> Other Disciplines of Agriculture, Forestry,Livestock & Aquatic Products Science submitted time 2023-02-17 Cooperative journals: 《智慧农业(中英文)》

    Abstract: Automatic grading method of pomelo fruit according to the shape and size is urgently needed in the industry since the work mainly depends on artificial judgment currently. In this research, a method, which detected the vertical and horizontal size of pomelo by using contour coordinate transformation fitting, fruit shape feature extraction and direction angle compensation algorithm, while it determined the shape defects based on fruit shape index, was proposed. The image acquisition system was selfdesigned and built up with a CMOS camera, a dot matrix LED light source, a plane mirror, the computer, a box and brackets. The image data containing whole surface information of Shatian pomelo samples with different sizes and shapes were collected by this system. The G-B component grayscale image was chosen for denoising and segmentation. The Laplacian edge detection algorithm was implemented to extract the edge pixels of the fruit. The polynomial fitting method was applied to converse the rectangular coordinates to polar coordinates so that the fruit shape description was simplified. The characteristic point polar angle value was used to compensate the random direction of the vertical and horizontal diameters of the sample. Then the vertical and horizontal diameters of fruit were calculated after classifying the sample shapes into the spherical and the pear-like categories. For the involved 168 pomelo samples, the average error, maximum absolute error and average relative error of the vertical diameters were 2.23 mm, 7.39 mm and 1.6% respectively, while these parameters of the horizontal diameters were 2.21 mm, 7.66 mm and 1.4% respectively. The fruit shape discriminant model was established by using BP neural network algorithm based on the seven features extracted from the fitting function and verified by independent validation set including 3 peak heights, 3 peak widths and 1 trough value difference. The total recognition rate of shape identification was 83.7%. The results illustrated that the method had the potential to measuring the pomelo size and shape for grading fast and non-destructively.

  • Qualitative Grading Standard for Chinese Children’s Books

    Subjects: Psychology >> Educational Psychology submitted time 2023-01-03

    Abstract:

    Elementary school students are at a critical stage of learning to read, and their language abilityand cognitive development require a large amount of reading materials that are appropriately difficult andconducive to comprehension. Current leveled reading mainly relies on shallow and quantitative text indicators, such as characters, words, and sentence level lexical properties, which is less suitable for thecharacteristics of Chinese ideographs and children's cognitive development needs. This study first usedmeta-analysis to glean eight qualitative cognitive indicators, including genre, theme, character, storyline, language feature, text structure, background knowledge, and life experience. Then we used the SOLOtaxonomy to develop a standardized grading description for each indicator that satisfied the developmental stages of children’s cognitive ability. Finally, we constructed the Qualitative Grading Standard for ChineseChildren’s Books and its operation manual. The follow-up empirical study showed that the qualitativeindicators had high discriminability, raters’ consistency reliability and predictive validity, and thus couldbeused to evaluate children’s books in an objective, reliable and valid way. In short, our Standard will helpschool teachers, book editors, and parents determine the appropriate grade level for children's books anduse Chinese leveled reading to promote children's language and cognitive development so that theycanachieve independent reading as early as possible.

    Peer Review Status: Commenting Commenting Dispute
  • 子宫恶性苗勒氏管混合瘤的临床病理特征及预后

    Subjects: Medicine, Pharmacy >> Preclinical Medicine submitted time 2018-01-25 Cooperative journals: 《南方医科大学学报》

    Abstract: Objective To evaluate the clinicopathological characteristics, treatment and prognosis of uterine malignant mixed mullerian tumor. Methods The clinical, pathologic and follow-up data of 16 patients with uterine malignant mixed Mullerian tumor treated in our hospital between March, 2003 and June, 2015 were analyzed. Results The 16 patients had a median age of 58 years at diagnosis, and 13 of them were postmenopausal. The number of patients with FIGO stageIa, Ib, II, IIIa, IIIc2, and IV was 7, 3, 1, 3, 1, and 1, respectively. In 15 patients who received uterine segment diagnostic curettage, pathological examination all reported malignant results. Among the 15 patients having serum CA125 level test upon admission, 2 had elevated CA125 levels. The overall and disease-free survival rates of the 16 patients were 75% and 68.8%, respectively, and the 3-year survival rate of 13 patients who were followed up for at least 3 years was 72.7%. Two out of 12 patients receiving retroperitoneal lymphnodedissectionhad had postoperative recurrence, as compared with 3 out 4 who did not had the operation; tumor recurrence was found in 3 out of 13 patients receiving postoperative chemotherapy, as compared with 2 out of 3 patients who did not have chemotherapy; tumor recurrence occurred in 1 out of 10 patients receiving radiotherapy, as compared with 4 out of 6 patients without radiotherapy. The recurrence rates in 11 patients with FIGO stage I-II was 18.2%, and that among the 5 patients with FIGO stage III-IV was 60.0%. Conclusions Uterine segment diagnostic curettage has a high diagnosticvalueforuterinemalignantmixedMulleriantumor.FIGOstageistheimportantprognosticfactorforthesepatients, and earlydiagnosis, accurate surgical staging, platinum-based chemotherapy and postoperative pelvic radiotherapy are all associatedwithabetterprognosis.

  • 口腔需氧菌及兼性厌氧菌种分离鉴定系统的建立

    Subjects: Medicine, Pharmacy >> Preclinical Medicine submitted time 2017-12-07 Cooperative journals: 《南方医科大学学报》

    Abstract: Objective To establish a systematic method for isolation and identification of aerobic and facultative anaerobic bacteria in the oral cavity. Methods Samples of the saliva, dental plaque and periapical granulation tissue were collected from 20 subjects with healthy oral condition and from 8 patients with different oral diseases. The bacteria in the samples were identified by morphological identification, VITEK automatic microorganism identification and 16s rRNA gene sequencing. Results VITEK automatic microorganism identification and 16s rRNA gene sequencing showed an agreement rate of 22.39% in identifying the bacteria in the samples. We identified altogether 63 bacterial genus (175 species), among which Streptococcus, Actinomyces and Staphylococcus were the most common bacterial genus, and Streptococcus anginosus, Actinomyces oris, Streptococcus mutans and Streptococcus mitis were the most common species. Streptococcus anginosus was commonly found in patients with chronic periapical periodontitis. Streptococcus intermedius and Staphylococcus aureus were common in patients with radiation caries, and in patients with rampant caries, Streptococcus mutans was found at considerably higher rate than other species. Conclusion Aerobic and facultative anaerobic bacteria are commonly found in the oral cavity, and most of them are gram-positive. 16s rRNA gene sequencing is more accurate than VITEK automatic microorganism identification in identifying the bacteria.

  • 地方智库转型发展的问题与思考

    Subjects: Library Science,Information Science >> Information Science submitted time 2017-11-05 Cooperative journals: 《智库理论与实践》

    Abstract: [Purpose/significance] In recent years, think tanks have developed rapidly across the country, but there are many common problems within them. How to transform the traditional research institutions to professional think tanks has practical significance. [Method/process] By using the methods such as the literature research, the case analysis, based on the case of Centre for Urban Governance Studies(CUGS), this article made some reflections on domestic local think tanks construction through summing up the experience of the development of traditional research institutions’ transformation to professional think tanks. [Result/conclusion] The “new” charateristics of the CUGS include the following aspects: the concept of innovation, professional characteristics, multi-sources of research funding, independence, etc., which provides great reference value for the construction of new types of local think tanks.

  • 饲粮铁水平对山麻鸭产蛋性能、蛋品质及肝脏和血液指标的影响

    Subjects: Biology >> Zoology submitted time 2017-10-10 Cooperative journals: 《动物营养学报》

    Abstract:本试验通过研究饲粮铁水平对山麻鸭产蛋性能、蛋品质及肝脏和血液指标的影响,旨在探讨产蛋期(17~30周龄)蛋鸭对饲粮铁的需要量。选用15周龄的山麻鸭432羽,随机分为6个组,每组6个重复,每个重复12羽,单笼饲养。试验蛋鸭饲喂不添加铁的基础饲粮(含铁52.2 mg/kg)2周后,分别在基础饲粮中添加0、15、30、45、60、75 mg/kg的一水合硫酸亚铁(FeSO4·H2O),试验饲粮铁水平分别为52.2、67.2、82.2、97.2、112.2和127.2 mg/kg。试验期14周。结果表明:1)产蛋初期(17~18周龄),随着饲粮铁水平的提高,平均蛋重先升高后降低,其中饲粮铁水平为67.2、82.2和97.2 mg/kg组的平均蛋重显著高于112.2 mg/kg组(P0.05)。2)随着饲粮铁水平的提高,蛋黄色泽呈先升高后下降趋势,饲粮铁水平为97.2 mg/kg组蛋黄色泽最高。3)肝脏铁含量随饲粮铁水平的提高而呈上升趋势,其中饲粮铁水平为127.2 mg/kg组的铁含量显著高于52.2 mg/kg组(P0.05)。5)血红蛋白浓度和红细胞压积随饲粮铁水平的提高而上升;饲粮铁水平为97.2、112.2和127.2 mg/kg组的血红蛋白浓度显著高于52.2 mg/kg组(P<0.05),饲粮铁水平为112.2和127.2 mg/kg组的红细胞压积显著高于52.2 mg/kg组(P<0.05)。6)以平均蛋重为指标,通过二次曲线模型的回归方程可获得产蛋初期山麻鸭饲粮适宜铁水平为73.9 mg/kg。综合考虑,建议产蛋初期山麻鸭饲粮铁水平为73.9 mg/kg,产蛋高峰期为52.2 mg/kg。

  • 蛋鸭产蛋高峰期色氨酸适宜需要量

    Subjects: Biology >> Zoology submitted time 2017-10-10 Cooperative journals: 《动物营养学报》

    Abstract:本试验旨在通过研究饲粮中不同色氨酸水平对蛋鸭产蛋性能、蛋品质、机体抗氧化指标和屠宰指标的影响,拟合出蛋鸭产蛋期色氨酸适宜需要量。选取120日龄山麻鸭900只,随机分为6个组,每个组6个重复,每个重复25只。各组蛋鸭分别饲喂色氨酸水平为0.12%、0.16%、0.20%、0.24%、0.28%、0.32%的试验饲粮,试验期20周。结果表明:1)饲粮色氨酸水平对蛋鸭产蛋率、平均蛋重、日产蛋重、料蛋比等无显著影响(P>0.05),但0.20%组在数值上表现出最高的产蛋率和日产蛋重。饲粮色氨酸水平对蛋壳强度、哈氏单位、蛋黄重、蛋黄比例、蛋壳重量、蛋壳比例、蛋壳厚度等蛋品质指标无显著影响(P>0.05),但显著影响蛋黄色泽(P0.05)。3)饲粮色氨酸水平对蛋鸭血清和肝脏抗氧化指标(除肝脏总超氧化物歧化酶)均无显著影响(P>0.05)。4)饲粮色氨酸水平对输卵管重量、输卵管长度、卵巢重量无显著影响(P>0.05)。根据折线模型拟合得出:饲粮色氨酸水平为0.20%时可满足产蛋高峰期蛋鸭营养需要。

  • 地方智库转型发展的问题与思考——以浙江省城市治理研究中心为例

    Subjects: Library Science,Information Science >> Information Science submitted time 2017-07-13 Cooperative journals: 《智库理论与实践》

    Abstract:[目的 /意义]近年来,全国各地智库发展迅速,但也存在诸多共性问题,探讨传统研究机构如何向专业智库发展的问题具有十分重要的现实意义。[方法 /过程]本文主要采用文献调研、案例分析的方法,对国内地方智库发展存在的问题进行总结梳理,并以浙江省城市治理研究中心为案例,对其向专业智库转型发展的经验做法进行分析。[结果 /结论 ]本文认为浙江省城市治理研究中心新型智库之"新"主要体现在理念创新、专业特色、研究自主、经费多源等方面,这对其他地方智库建设具有一定的借鉴价值。