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种子休眠与萌发的关键调控因子DOG1的研究进展
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作者 宋松泉 唐翠芳 +2 位作者 姜孝成 王伟青 程红焱 《植物科学学报》 CAS CSCD 北大核心 2024年第2期254-265,共12页
DOG1(Delay of germination 1)蛋白是种子休眠的一种主要调控因子,可与ABA协同作用来延迟种子萌发。核心脱落酸(ABA)信号转导途径和DOG1途径在蛋白磷酸酶2C(PP2C)中汇聚。DOG1调控种子休眠需要PP2C,并通过与ABA过敏感萌发(AHG1/AHG3)结... DOG1(Delay of germination 1)蛋白是种子休眠的一种主要调控因子,可与ABA协同作用来延迟种子萌发。核心脱落酸(ABA)信号转导途径和DOG1途径在蛋白磷酸酶2C(PP2C)中汇聚。DOG1调控种子休眠需要PP2C,并通过与ABA过敏感萌发(AHG1/AHG3)结合来增强ABA的信号转导。DOG1抑制AHG1的作用来增加ABA的敏感性和诱导种子休眠。近年来,DOG1对种子休眠与萌发的调控研究取得了显著进展。本文对该领域的研究成果进行了综述,主要包括:DOG1对种子成熟、休眠与萌发的作用,DOG1表达的转录调控机制以及DOG1对种子休眠与萌发的调控及作用机制,最后提出了在本领域需要进一步研究的科学问题。 展开更多
关键词 ABA信号 dog1调控因子 种子休眠 分子机制 转录因子
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三阴性乳腺癌患者CD117、DOG1表达水平与临床病理特征及预后的相关性 被引量:1
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作者 王雅娟 王媛 任新瑜 《协和医学杂志》 CSCD 北大核心 2024年第3期616-623,共8页
目的 探究CD117、DOG1表达水平与三阴性乳腺癌(triple-negative breast cancer, TNBC)患者临床病理特征及预后的相关性。方法 回顾性纳入2000—2011年北京协和医院的TNBC患者。取其肿瘤组织芯片,采用免疫组化法检测肿瘤细胞中CD117、DOG... 目的 探究CD117、DOG1表达水平与三阴性乳腺癌(triple-negative breast cancer, TNBC)患者临床病理特征及预后的相关性。方法 回顾性纳入2000—2011年北京协和医院的TNBC患者。取其肿瘤组织芯片,采用免疫组化法检测肿瘤细胞中CD117、DOG1表达情况,分析二者与患者年龄、肿瘤直径、美国癌症联合委员会(American Joint Committee on Cancer, AJCC)分期、组织学分级、P53、Ki-67增殖指数等临床病理特征的关系,及其对患者生存期的影响。结果共入选符合纳入与排除标准的TNBC患者185例,其中CD117阳性24例(12.97%),DOG1阳性22例(11.89%),二者共表达率为1.62%。相较于肿瘤细胞CD117阴性患者,CD117阳性患者中高Ki-67增殖指数(87.50%比67.70%,P=0.048)、基底样TNBC(95.83%比74.53%,P=0.020)、P53弥漫强阳(33.33%比13.66%,P=0.032)的比例均更高。相较于DOG1阴性患者,DOG1阳性患者中肿瘤直径≤2 cm(22.73%比45.40%,P=0.026)、基底样TNBC(54.55%比80.37%,P=0.015)的比例均更低。中位随访时间71个月(范围:2~170个月),失访4例(2.16%),复发或远处转移66例(35.68%),死亡34例(18.38%)。生存分析显示,AJCC分期(HR=7.624,95%CI:2.187~26.576,P=0.001)及CD117阳性伴P53弥漫强阳(HR=3.942,95%CI:1.366~11.379,P=0.011)与TNBC患者总生存期呈负相关。结论 CD117阳性、DOG1阴性与基底样TNBC具有一定相关性,且CD117阳性伴P53弥漫强阳者总生存期更短,死亡风险增高。 展开更多
关键词 三阴性乳腺癌 CD117 dog1 预后
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Efficacy of 1% Permethrin and 2% Permethrin Combined with 1% Piperonyl Butoxide against Rhipicephalus sanguineus Ticks in Naturally Infested Dogs
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作者 Andrea Márquez-Aguado Froylán Ibarra-Velarde +1 位作者 Joaquín Ambia-Medina Rosa Arias-García 《Pharmacology & Pharmacy》 2024年第7期237-247,共11页
The aim of the present study was to compare the ixodicide efficacy of 1% permethrin applied as a shampoo-bath in single treatment and a combined formulation of 2% permethrin + 1% piperonyl butoxide applied as powder i... The aim of the present study was to compare the ixodicide efficacy of 1% permethrin applied as a shampoo-bath in single treatment and a combined formulation of 2% permethrin + 1% piperonyl butoxide applied as powder in a single treatment against Rhipicephalus sanguineus ticks, in naturally infested dogs. Eighteen adult cross-mixed dogs, harboring to at least 20 ticks/animal, were selected on pre-treatment live tick counts. On day 0, the dogs were then divided in 3 groups of 6 animals each, for treatment: Group 1 (G1) received 1% permethrin applied as shampoo-bath (approximately 10 ml/kg bw), according to label instructions. G2 was treated with 2% permethrin + 1% piperonyl butoxide applied as powder, and rubbed as massage on the body, as recommended by the producer. G3 served as a non-treated control. After the treatment, the dogs were checked out for live ticks counting on days 0, 1, 7, and 14. The ixodicide efficacy was assessed based on the percentage reductions of ticks on the days analyzed post-treatment, with respect to the untreated control. Results showed that permethrin alone removed ticks on 81%, 93.1% and 89.6% for days 1, 7 and 14, respectively. The combined formulation of 2% permethrin + 1% piperonyl butoxide exerted a better efficacy of 98.8, 97.7 and 97.0%, respectively. It is concluded that this combined formulation was highly effective at rapidly repelling and killing Riphicephalus sanguineus ticks on naturally infected dogs, showing a significant effect on days 1, 7 and 14 after tick exposure. The sustained high and quick level of efficacy of this combination may well interfere with the transmission of Riphicephalus sanguineus ticks. It is concluded that the sustained high level of efficacy of the permethrin + piperonyl butoxide combination may well exert an additive effect and could interfere with the transmission of Riphicephalus sanguineus ticks. 展开更多
关键词 EFFICACY PERMETHRIN Permethrin + Piperonyl Butoxide Riphicephalus sanguineus dogS
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Hybrid Prairie Dog and Beluga Whale Optimization Algorithm for Multi-Objective Load Balanced-Task Scheduling in Cloud Computing Environments
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作者 K Ramya Senthilselvi Ayothi 《China Communications》 SCIE CSCD 2024年第7期307-324,共18页
The cloud computing technology is utilized for achieving resource utilization of remotebased virtual computer to facilitate the consumers with rapid and accurate massive data services.It utilizes on-demand resource pr... The cloud computing technology is utilized for achieving resource utilization of remotebased virtual computer to facilitate the consumers with rapid and accurate massive data services.It utilizes on-demand resource provisioning,but the necessitated constraints of rapid turnaround time,minimal execution cost,high rate of resource utilization and limited makespan transforms the Load Balancing(LB)process-based Task Scheduling(TS)problem into an NP-hard optimization issue.In this paper,Hybrid Prairie Dog and Beluga Whale Optimization Algorithm(HPDBWOA)is propounded for precise mapping of tasks to virtual machines with the due objective of addressing the dynamic nature of cloud environment.This capability of HPDBWOA helps in decreasing the SLA violations and Makespan with optimal resource management.It is modelled as a scheduling strategy which utilizes the merits of PDOA and BWOA for attaining reactive decisions making with respect to the process of assigning the tasks to virtual resources by considering their priorities into account.It addresses the problem of pre-convergence with wellbalanced exploration and exploitation to attain necessitated Quality of Service(QoS)for minimizing the waiting time incurred during TS process.It further balanced exploration and exploitation rates for reducing the makespan during the task allocation with complete awareness of VM state.The results of the proposed HPDBWOA confirmed minimized energy utilization of 32.18% and reduced cost of 28.94% better than approaches used for investigation.The statistical investigation of the proposed HPDBWOA conducted using ANOVA confirmed its efficacy over the benchmarked systems in terms of throughput,system,and response time. 展开更多
关键词 Beluga Whale Optimization Algorithm(BWOA) cloud computing Improved Hopcroft-Karp algorithm Infrastructure as a Service(IaaS) Prairie dog Optimization Algorithm(PDOA) Virtual Machine(VM)
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狂犬病毒GSQY-Dog-China-2013株全基因组序列测定和遗传进化分析
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作者 邢广旭 姜中毅 +2 位作者 焦文强 王方雨 张改平 《中国兽医杂志》 CAS 北大核心 2023年第1期8-13,共6页
为了全面分析我国狂犬病病毒遗传进化情况,本试验使用反转录PCR(RT-PCR)方法将狂犬病病毒GSQY-Dog-China-2013分为10个片段进行扩增,回收目的片段并与pMD20-T simple载体连接,转化JM109感受态细胞,挑取阳性克隆进行测序;使用DNASTAR软... 为了全面分析我国狂犬病病毒遗传进化情况,本试验使用反转录PCR(RT-PCR)方法将狂犬病病毒GSQY-Dog-China-2013分为10个片段进行扩增,回收目的片段并与pMD20-T simple载体连接,转化JM109感受态细胞,挑取阳性克隆进行测序;使用DNASTAR软件中的Edit Seq通过拼接相邻片段之间的重叠序列获得GSQY-Dog-China-2013全基因组序列,构建系统进化树进行遗传进化分析。结果显示,GSQY-Dog-China-2013全长11924核苷酸(nt),包含5个开放阅读框,分别编码核蛋白(N)、磷蛋白(P)、基质蛋白(M)、糖蛋白(G)和转录大蛋白(L);基于全基因组序列的进化树分析显示,GSQY-Dog-China-2013株和国内分离株形成一个分支,在国内分离株中与SXYL15株和SXBJ15株形成一个分支,亲缘关系最接近,提示GSQY-Dog-China-2013可能源自我国陕西省。本试验系甘肃省首次报道狂犬病病毒全基因组序列,进一步丰富了我国狂犬病病毒遗传进化数据,为狂犬病全面防治以及疫苗研发提供了数据支持。 展开更多
关键词 狂犬病病毒 GSQY-dog-China-2013 全基因组序列测定 遗传进化分析
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种子休眠与萌发调控的研究进展 被引量:1
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作者 宋松泉 唐翠芳 +3 位作者 雷华平 姜孝成 王伟青 程红焱 《作物学报》 CAS CSCD 北大核心 2024年第1期1-15,共15页
休眠使植物种子能够为萌发安排时间,直到环境条件变得有利于幼苗的存活与生长。种子的休眠特性具有重要的生态适应性意义和显著的农业价值。植物激素脱落酸(ABA)和赤霉素(GA)是种子休眠与萌发的关键因素,处于休眠状态的成熟种子含有高... 休眠使植物种子能够为萌发安排时间,直到环境条件变得有利于幼苗的存活与生长。种子的休眠特性具有重要的生态适应性意义和显著的农业价值。植物激素脱落酸(ABA)和赤霉素(GA)是种子休眠与萌发的关键因素,处于休眠状态的成熟种子含有高水平的ABA和低水平的GA;ABA诱导和维持种子休眠,而GA拮抗ABA的作用和促进种子萌发。萌发延迟-1 (DOG1)是种子休眠的主要调控因子,与ABA协同作用延迟萌发。DOG1通过与PP2C ABA过敏感萌发(AHG1/AHG3)结合以增强ABA的信号转导,以及抑制AHG1的作用以增加ABA的敏感性和强加种子休眠。印记基因在受精前后受到表观遗传机制的调控,与种子休眠的建立与释放密切相关。近年来,种子休眠的调控研究取得了显著的进展。本文综述了植物激素ABA和GA对种子休眠与萌发的控制, DOG1调控种子休眠的作用机制,以及种子休眠与萌发的表观遗传调控,并提出了在本领域需要进一步研究的科学问题,以期为深入理解种子休眠与萌发的分子机制、抗穗萌发育种以及促进休眠种子的萌发提供参考。 展开更多
关键词 dog1 表观遗传 分子机制 植物激素 种子休眠
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Amino acid nutrition and metabolism in domestic cats and dogs
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作者 Peng Li Guoyao Wu 《Journal of Animal Science and Biotechnology》 SCIE CAS CSCD 2023年第5期1777-1797,共21页
Domestic cats and dogs are carnivores that have evolved differentially in the nutrition and metabolism of amino acids.This article highlights both proteinogenic and nonproteinogenic amino acids.Dogs inadequately synth... Domestic cats and dogs are carnivores that have evolved differentially in the nutrition and metabolism of amino acids.This article highlights both proteinogenic and nonproteinogenic amino acids.Dogs inadequately synthesize citrulline(the precursor of arginine)from glutamine,glutamate,and proline in the small intestine.Although most breeds of dogs have potential for adequately converting cysteine into taurine in the liver,a small proportion(1.3%-2.5%)of the Newfoundland dogs fed commercially available balanced diets exhibit a deficiency of taurine possibly due to gene mutations.Certain breeds of dogs(e.g.,golden retrievers)are more prone to taurine deficiency possibly due to lower hepatic activities of cysteine dioxygenase and cysteine sulfinate decarboxylase.De novo synthesis of arginine and taurine is very limited in cats.Thus,concentrations of both taurine and arginine in feline milk are the greatest among domestic mammals.Compared with dogs,cats have greater endogenous nitrogen losses and higher dietary requirements for many amino acids(e.g.,arginine,taurine,cysteine,and tyrosine),and are less sensitive to amino acid imbalances and antagonisms.Throughout adulthood,cats and dogs may lose 34%and 21%of their lean body mass,respectively.Adequate intakes of high-quality protein(i.e.,32%and 40%animal protein in diets of aging dogs and cats,respectively;dry matter basis)are recommended to alleviate aging-associated reductions in the mass and function of skeletal muscles and bones.Pet-food grade animal-sourced foodstuffs are excellent sources of both proteinogenic amino acids and taurine for cats and dogs,and can help to optimize their growth,development,and health. 展开更多
关键词 Animal-sourced foodstuffs CATS dogS Health METABOLISM NUTRITION
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Impact of Fluorescent Light Energy on the Quality of Life of Dogs with Dermatologic Disease and Their Owners
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作者 Marion Mosca Amaury Briand +2 位作者 Isaac Carrasco Luca Luciani Oscar Fantini 《Open Journal of Veterinary Medicine》 2023年第7期122-135,共14页
Background: Quality of life (QoL) is a term used to evaluate general well-being, and it is defined as ‘the degree to which an individual enjoys his or her life. Within the realm of medicine, the evaluation of QoL fre... Background: Quality of life (QoL) is a term used to evaluate general well-being, and it is defined as ‘the degree to which an individual enjoys his or her life. Within the realm of medicine, the evaluation of QoL frequently involves examining how disease exerts a detrimental impact, diminishing the enjoyment and fulfilment experienced by the individual. Dermatological diseases have been found to exert a substantial negative influence on the QoL of dogs and their owners due to nuisance and stress related to the disease but also due to the caregiver burden. In the management of bacterial skin infections, topical therapy is commonly administered alongside systemic antibiotics. Nonetheless, the protracted duration of treatment and difficulties in ensuring owner compliance can introduce a significant caregiver burden, potentially exacerbating the challenges associated with these conditions. Purpose: This study aimed to evaluate the impact on the quality of life (QoL) of dogs with dermatologic diseases after fluorescent light energy (FLE) treatment. Methods: The study was an open, prospective, multicentric clinical trial that included dogs with various dermatological conditions. The dogs received FLE treatment once weekly until the clinical resolution was achieved. Owners completed a validated questionnaire to assess the QoL of their dogs before and after therapy. Results: Thirty-five dogs with deep pyoderma, interdigital furunculosis, pyotraumatic dermatitis, wounds and perianal fistulas were included. All dogs received two sessions of fluorescent light energy once a week. Median treatment duration was 9 weeks for perianal fistula, 7 weeks for interdigital furunculosis, 5 weeks for deep pyoderma, 3 weeks for wounds and 1.5 weeks for pyotraumatic dermatitis. Complete remission was noted in 86% of dogs, and 14% showed an improvement but partial remission. The majority of owners reported a positive impact on their dogs’ QoL after therapy, and 74% of the dogs showed at least a 50% reduction in QoL scores. Conclusion: Fluorescent light energy has been shown to exert beneficial effects on the healing of dermatological diseases and the quality of life (QoL) in dogs and their owners, whether used as a standalone treatment or in combination with standard care therapies. Additionally, it was well-tolerated by the dogs. This study emphasizes the significance of considering both the owner’s and dog’s QoL when evaluating the therapeutic efficacy of dermatological treatments. 展开更多
关键词 Fluorescent Light Energy Quality of Life dog DERMATOLOGY
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Therapeutic Effects of an Alpha-Casozepine and White Fish Muscle Hydrolyzed Complementary Feed on Canine Separation-Related Disorders and Quality of Life of Dogs and Their Pet Owners
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作者 Gaëlle Porcheron Marie Bodet +4 位作者 Katell Poiron Julie Brault Nicolas Massal Olivier Roy Oscar Fantini 《Open Journal of Veterinary Medicine》 2023年第6期68-81,共14页
Background: Separation-related disorders are prevalent in dogs and can result in problem behaviours such as inappropriate elimination, destructive behaviour, and distress vocalizations which occur when an owner is abs... Background: Separation-related disorders are prevalent in dogs and can result in problem behaviours such as inappropriate elimination, destructive behaviour, and distress vocalizations which occur when an owner is absent or perceived as absent. Numerous natural products are marketed for managing anxiety in dogs;however, few, if any, of these products have documented evidence of efficacy in veterinary behaviour. Purpose: This open, multicentric clinical trial aimed to assess the efficacy of a new supplement containing alpha-casozepine and fish muscle hydrolysate on the separation-related problem in dogs and the impact on the quality of life of dogs and their pet owners. Material and Methods: Fifty-one dogs with clinical signs compatible with separation-related problems were included. The dogs were treated with a complementary feed (Zylkene Plus, Vetoquinol, France) for 30 days. Separation-related behaviour assessment (SRP), emotional disorders assessment (EDED) and the quality of life (QoL) of the pets and their pet owner were assessed at baseline and the end of the study by the veterinarians. In addition, owners were asked to rate their dog’s SRP weekly after enrolment using the same questionnaire that the veterinarian used at the beginning of the study. Results: There was a statistically significant improvement in the SRP, EDED, and QoL scores (P Conclusion: The results of this study support the hypothesis that the combination of alpha-casozepine and fish muscle hydrolysate is a promising and effective option to reduce the frequency and severity of separation-related behaviour in dogs and improve the quality of dogs and their owners. 展开更多
关键词 Alpha-Casozepine Fish Muscle Hydrolysate Canine Separation-Related Disorders dogS
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Stray Dogs Problem and Right Approach to Prevent Attack
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作者 Halil Ecel Serap Göncü 《Journal of Environmental Science and Engineering(A)》 2023年第3期106-115,共10页
In this study,it is aimed to examine the knowledge level of reading stray dogs’behavior and the correct approach.Understanding the aggression of dogs and understanding their behavior is very important for stray dogs ... In this study,it is aimed to examine the knowledge level of reading stray dogs’behavior and the correct approach.Understanding the aggression of dogs and understanding their behavior is very important for stray dogs and dog owners in social life.Questionnaires prepared online were shared with 279 people of different ages and genders working in different fields in 50 provinces located in different regions,and the feedback obtained by answering voluntarily was taken into consideration.As a result of the study,when a dangerous-looking dog is encountered,it is necessary to stay as calm as possible and start to walk away slowly,without losing sight of the dog,with short steps,and without running under any circumstances.But without turning your back,because turning your back on the dog is a sign of weakness and an invitation to attack.While 36%left unanswered the question of what should be done at the time of the dog attack,20.1%replied by saying that they would stand calmly and shout and scare,and 20.9%would shout and stop.The results of the survey show that there are inaccuracies and deficiencies in both the body language of the dogs and the way they approach the dog.The participants answered the frequency of encountering stray animals by saying 75.9%daily.A safe approach to dogs or knowing the suitable approaches to calm a dangerous dog is very important in eliminating the dangers.These results show that there is a need for correct,informative activities on dog behavior and the right approach. 展开更多
关键词 Stray dogs PROBLEM APPROACH KNOWLEDGE
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An Ecofeminism Interpretation of Ian McEwan’s Black Dogs
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作者 HE Yuan 《Journal of Literature and Art Studies》 2023年第10期757-762,共6页
Ian McEwan’s Black Dogs reflects the anxiety and panic after the Second World War vividly with charming words.Based on Ian McEwan’s Black Dogs,many scholars have explored and acquired great achievements in trauma wr... Ian McEwan’s Black Dogs reflects the anxiety and panic after the Second World War vividly with charming words.Based on Ian McEwan’s Black Dogs,many scholars have explored and acquired great achievements in trauma writing and historical writing.Through analyzing the similarities of the heroine’s long-term neglected inner needs and the cruelly killed creatures in nature,this paper finds there is an intimate connection between female and nature in Black Dogs.However,instead of being in a constant state of repression,female and nature will fight back.To sum up,this paper attempts to make an ecofeminism interpretation of Ian McEwan’s Black Dogs.A conclusion may be reached that June’s spiritual awakening resonates with enhancement of nature’s power. 展开更多
关键词 Ian McEwan Black dogs ECOFEMINISM
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宝坻-苗庄凸起新生断裂脆韧性转换深度研究
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作者 李赫 董一兵 +5 位作者 王熠熙 高武平 闫成国 蔡玲玲 吴博洋 彭钊 《Applied Geophysics》 SCIE CSCD 2024年第1期188-202,206,共16页
现今地震是最新构造活动的最直接表现,是认识大陆内部非刚性变形特征的最有力工具。尤其是对晚更新世以来开始活动的新生断裂来说,由于发育成熟度低,几何构造上贯通性差且不同区段走向/不同深度倾向差异明显,地震能够揭示其三维空间的变... 现今地震是最新构造活动的最直接表现,是认识大陆内部非刚性变形特征的最有力工具。尤其是对晚更新世以来开始活动的新生断裂来说,由于发育成熟度低,几何构造上贯通性差且不同区段走向/不同深度倾向差异明显,地震能够揭示其三维空间的变化,尤其是脆韧性转换深度特征,促进对新生活动断裂孕育、发震过程的认识。渤海湾盆地新生走滑活动断裂曾多次发生强震,如唐山M_(S)7.8、三次宁河M_(S)≥6.2地震,这些地震揭示的地壳脆-韧性转换深度对认识该地区地震发震机理和活动性具有重要的现实意义。本文以渤海湾盆地内宝坻-苗庄凸起新生断裂为目标断裂,以发生于宝坻凸起的2012年宝坻M_(S)4.0、M_(S)3.5地震以及发生于苗庄凸起的1976年宁河M_(S)6.2、M_(S)6.9、1977年宁河M_(S)6.2地震为研究对象,基于首都圈数字地震台网的波形资料,采用CAP方法研究宝坻M_(S)4.0、M_(S)3.5地震震源机制解和震源深度,利用近震转换波Sp精确确定震源深度,采用双差方法定位两个地震序列的震源位置,并结合其他资料探讨该地区地震的发震机理以及新生断裂脆韧性转换深度。结果显示:(1)宝坻M_(S)4.0、M_(S)3.5地震震源性质与宝坻-苗庄凸起出露地表的已知断裂不尽相符,结合宁河三次MS≥6.2地震震源参数的有关研究成果,推测它们均发震于宝坻-宁河深大断裂;(2)结合震源区电性结构以及流变结构等模型,宝坻-苗庄凸起这五次显著地震揭示出宝坻-宁河深大断裂的脆韧性转换深度为15km左右;(3)结合渤海湾盆地动力演化过程以及深部地球物理探测等相关资料,推测该地区地震活动主要是宝坻-宁河深大断裂与深部流体作用的结果。 展开更多
关键词 新生断裂 渤海湾盆地 宝坻-苗庄凸起 宝坻-宁河深大断裂 脆韧性转换深度
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Dog Mania
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作者 《疯狂英语(初中天地)》 2023年第5期62-64,共3页
What is the number one favourite pet in the UK?If you think the answer is“dogs”-you are wrong.There are 8.6 million cats and 8.3 million dogs in Britain according to recent figures.But experts predict that there wil... What is the number one favourite pet in the UK?If you think the answer is“dogs”-you are wrong.There are 8.6 million cats and 8.3 million dogs in Britain according to recent figures.But experts predict that there will be more dogs than cats next year as dogs become more and more popular. 展开更多
关键词 BRITAIN dogS milli
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两种卡洛芬注射液在犬体内的生物等效性试验
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作者 张璐 邱基程 +3 位作者 龚晓会 曹玉颖 孔靖元 曹兴元 《中国畜牧兽医》 CAS CSCD 北大核心 2024年第5期2178-2187,共10页
【目的】建立犬血浆中卡洛芬的超高效液相色谱-串联质谱(UPLC-MS/MS)检测方法,比较两种以卡洛芬为活性成分的制剂在比格犬体内的药代动力学特征,以评价其生物等效性。【方法】24只健康比格犬随机分成2组,按单剂量、双周期和双序列的交... 【目的】建立犬血浆中卡洛芬的超高效液相色谱-串联质谱(UPLC-MS/MS)检测方法,比较两种以卡洛芬为活性成分的制剂在比格犬体内的药代动力学特征,以评价其生物等效性。【方法】24只健康比格犬随机分成2组,按单剂量、双周期和双序列的交叉设计,分别皮下注射4.4 mg/kg BW受试制剂和参比制剂RIMADYL,于给药前(0 h)和给药后0.5、1、2、3、4、6、8、12、24、36、48和72 h从臂头静脉采血。对UPLC-MS/MS方法的特异性、线性、检测限、定量限、准确度、精密度、稳定性等进行考察。利用建立好的UPLC-MS/MS方法测定血浆中卡洛芬的浓度,并用WinNonlin 8.1软件对达峰时间(T_(max))、达峰浓度(C_(max))、消除半衰期(T_(1/2))、药时曲线下面积(AUC_(0-t))等药代动力学参数进行分析,判定两制剂是否等效。【结果】建立的UPLC-MS/MS分析方法在10~5000 ng/mL浓度范围内线性关系良好,相关系数(R^(2))≥0.99;检测限和定量限分别为5和10 ng/mL;高、中、低、定量限4个浓度的相对回收率在91.45%~111.61%范围内,日内和日间变异系数均<15%。参比制剂和受试制剂的T_(max)分别为(2.27±1.09)和(2.33±1.10)h;C_(max)分别为(20.02±5.24)和(19.92±5.42)μg/mL;T_(1/2)分别为(8.54±3.71)和(8.65±2.64)h;AUC_(0-t)分别为(246.78±55.94)和(249.22±53.33)μg·h/mL。受试制剂与参比制剂的药时曲线相似,且受试制剂相比参比制剂,主要药动学参数C_(max)、AUC_(0-t)和AUC_(0-∞)的90%置信区间均在80.00%~125.00%之间。【结论】本试验建立的UPLC-MS/MS分析方法准确、可靠,可用于血浆中卡洛芬浓度的测定,卡洛芬的受试制剂与参比制剂RIMADYL具有生物等效性,临床上均可用于相关疾病的治疗,本试验结果可为卡洛芬兽医临床合理用药提供参考。 展开更多
关键词 药代动力学特征 生物等效性 比格犬 卡洛芬注射液 UPLC-MS/MS
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补充后生元对犬粪便特性、血清生化指标及粪便菌群的影响
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作者 蔡旋 刘珊 +2 位作者 王莹 方明棵 杨亚珍 《饲料研究》 CAS 北大核心 2024年第1期131-136,共6页
研究旨在探讨后生元对宠物健康的影响。选择12只比格犬,根据体重和性别一致的原则,随机分成两组(A组和B组),每组6个重复,每个重复1只犬。研究采用交叉试验,比较了成年健康比格犬采食添加200 g/d后生元的日粮及对照日粮期间血清生化指标... 研究旨在探讨后生元对宠物健康的影响。选择12只比格犬,根据体重和性别一致的原则,随机分成两组(A组和B组),每组6个重复,每个重复1只犬。研究采用交叉试验,比较了成年健康比格犬采食添加200 g/d后生元的日粮及对照日粮期间血清生化指标及粪便菌群的差异。结果显示,采食基础日粮的比格犬平均粪便评分为2.97,采食添加后生元日粮的比格犬平均粪便评分为2.54。与采食基础日粮相比,采食添加后生元日粮的犬血清甘油三酯含量下降了51.16%(P<0.05),胆固醇含量下降了29.92%(P<0.05),血清尿酸含量下降了11.43%(P<0.05)。与采食基础日粮相比,采食后生元日粮的犬血清免疫球蛋白G(IgG)、肿瘤坏死因子-α(TNF-α)和白细胞介素-1(IL-1)含量分别降低了7.85%、23.97%和29.54%(P<0.05)。后生元后可增加犬粪便中乳杆菌属(Lactobacillus)和芽孢杆菌(Bacillus)等有益菌的相对丰度,降低梭杆菌属(Fusobacterium)和厌氧螺菌属(Anaerobiospirillum)等有害菌的相对丰度。研究表明,日粮中补充后生元能够改善犬的肠道健康。 展开更多
关键词 后生元 粪便评分 血脂 肠道屏障 菌群
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异形分流管热流道家族注塑模具设计
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作者 战忠秋 王海军 +1 位作者 赵凌云 魏莹 《塑料》 CAS CSCD 北大核心 2024年第3期65-71,共7页
介绍了某款异形分流管零件热流道注塑模具的设计过程。模具设计中,首先,分析了注塑件的零件特征和生产要求,确定了模具的基本结构方案;再利用Moldflow软件分析模具注塑成型过程,预测零件的成型时间、翘曲变形量、熔接痕位置等,最终完成... 介绍了某款异形分流管零件热流道注塑模具的设计过程。模具设计中,首先,分析了注塑件的零件特征和生产要求,确定了模具的基本结构方案;再利用Moldflow软件分析模具注塑成型过程,预测零件的成型时间、翘曲变形量、熔接痕位置等,最终完成整套模具的设计。模具采用两板式热流道冷浇口注塑成型,浇口选择潜伏式点浇口形式,开模时自动拉断与注塑件分离;模具定模型腔设计了1个弹性脱模镶件,保证了开模时塑件紧贴型芯侧;模具分型面上共分布了5个侧抽芯滑块结构,由弯销导向并延时开模。对常用型弯销滑块机构进行了改进,将两段式弯销改进为三段式弯销,有效地避免了常用弯销滑块机构容易出现卡死和锁闭不紧的问题。模具经过实际生产验证可知,结构合理可靠,制备得到的零件尺寸精度满足设计要求。 展开更多
关键词 异形分流管 热流道 冷浇口 弹性脱模镶件 弯销 MOLDFLOW
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流浪动物慈善救助中的“远狗近猫”效应及其机制探析
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作者 柳武妹 王璐 《心理学报》 CSCD 北大核心 2024年第6期777-798,I0009-I0015,共29页
已有的亲社会研究都在关注对人的慈善捐赠,关于流浪动物的慈善救助并未有人探讨。由于日常生活中流浪动物救助信息通常会同时呈现动物类型和空间距离,因此本文基于动物类型和空间距离之间的联结来探讨二者对流浪动物救助意愿的影响,以... 已有的亲社会研究都在关注对人的慈善捐赠,关于流浪动物的慈善救助并未有人探讨。由于日常生活中流浪动物救助信息通常会同时呈现动物类型和空间距离,因此本文基于动物类型和空间距离之间的联结来探讨二者对流浪动物救助意愿的影响,以及其中的机制和边界条件。通过1个内隐联想测验、1个田野实验和7个不同情景的线上实验和实验室实验,本文发现:猫与近空间距离更匹配;狗与远空间距离更匹配(实验1a、1b)。因此,在近空间距离的情况下,呈现流浪猫(vs.流浪狗)引发人们对流浪动物的更高救助意愿;在远空间距离的情况下,呈现流浪狗(vs.流浪猫)引发人们对流浪动物的更高救助意愿(实验2、3、3S、4、4S、5);加工流畅性是内在中介(实验4、4S、5)。此外,思维模式会调节上述“远狗近猫”效应,也即该效应在基于情感的思维模式下存在但在基于理性的思维模式下消失(实验6)。理论层面,本文关注了流浪动物这一新颖的慈善捐赠对象,验证了动物类型和空间距离的内在联系。本文还识别出了流浪动物救助中的“远狗近猫”效应。实践层面,“远狗近猫”效应可以指导慈善组织和机构根据动物类型和空间距离的匹配来合理呈现救助信息。 展开更多
关键词 “远狗近猫”效应 动物救助 加工流畅性 思维模式
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罗布桑胡尔奇《宝迪莫尔根罕》胡仁·乌力格尔音乐的多样性特征初探——以《Folklore Mongol》(1960年版)中的曲调文本为例
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作者 楚高娃 《北方音乐》 2024年第2期122-130,共9页
文章以《Folklore Mongol》(1960年版)中收录的《宝迪莫尔根罕》胡仁·乌力格尔音乐的曲调文本为研究对象,分析其乐谱文本和胡尔奇的创作技法,探析罗布桑胡尔奇胡仁·乌力格尔音乐的多样性特征;并通过介绍和挖掘域外学者所搜集... 文章以《Folklore Mongol》(1960年版)中收录的《宝迪莫尔根罕》胡仁·乌力格尔音乐的曲调文本为研究对象,分析其乐谱文本和胡尔奇的创作技法,探析罗布桑胡尔奇胡仁·乌力格尔音乐的多样性特征;并通过介绍和挖掘域外学者所搜集整理的文本资料,为当代民族音乐研究提供参考。 展开更多
关键词 乌·罗布桑 《宝迪莫尔根罕》 胡仁·乌力格尔音乐 多样性
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干细胞因子在3例犬急性脊髓神经系统疾病治疗中的应用和体会
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作者 王福军 《中国兽医杂志》 CAS 北大核心 2024年第4期138-142,共5页
犬神经系统疾病常表现为突发性、复杂性和难治性的特点,给临床诊断与治疗带来很多困难。磁共振成像(MRI)检查具备良好的软组织对比效果,为神经系统疾病诊断提高了准确性。本文介绍了3例患有神经系统疾病的患犬病例,结合临床症状和X线或... 犬神经系统疾病常表现为突发性、复杂性和难治性的特点,给临床诊断与治疗带来很多困难。磁共振成像(MRI)检查具备良好的软组织对比效果,为神经系统疾病诊断提高了准确性。本文介绍了3例患有神经系统疾病的患犬病例,结合临床症状和X线或MRI影像学检查结果确诊其为椎间盘疾病并继发急性脊髓神经损伤。患犬经常规治疗效果不明显,后通过静脉输注干细胞因子,1支/d,连用3 d治疗,迅速取得理想的康复效果。由本文患犬治疗结果得出,干细胞因子在修复神经损伤方面有一定疗效。 展开更多
关键词 神经系统疾病 磁共振成像(MRI) 干细胞因子
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一例犬异位性皮炎并发小孢子菌感染病例的诊治与分析
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作者 吴萍萍 张晓艳 贺绍君 《信阳农林学院学报》 2024年第1期85-89,共5页
1只2岁8月龄雄性阿拉斯加雪橇犬出现持续性舔舐脚部皮肤、面部,趾间瘙痒、脱毛,脾气暴躁。采取临床检查、瘙痒评分、血液学及影像学检查、过敏原测试和鼻部皮肤刮片细胞学镜检等方法,确诊患犬为异位性皮炎并发小孢子菌感染。第一阶段通... 1只2岁8月龄雄性阿拉斯加雪橇犬出现持续性舔舐脚部皮肤、面部,趾间瘙痒、脱毛,脾气暴躁。采取临床检查、瘙痒评分、血液学及影像学检查、过敏原测试和鼻部皮肤刮片细胞学镜检等方法,确诊患犬为异位性皮炎并发小孢子菌感染。第一阶段通过驱虫止痒、药浴、饮食管理、抗菌消炎和定期监测管理,治疗5周后复查细胞学,未见小孢子真菌,瘙痒症状明显改善;第二阶段继续治疗3周,瘙痒得到控制,性格变得温顺。共治疗10周后,该犬皮肤屏障重新建立,毛发生长完全,无瘙痒状态,患犬痊愈。出院2周后电话回访未出现异常、无复发,说明针对该病例采取的治疗方案可行有效。 展开更多
关键词 异位性皮炎 小孢子菌 过敏原 诊治
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