Carnivorous fish have poor tolerance to carbohydrate in feed and low utilization rate of carbohydrate.Therefore,the balance of carbohydrate and lipids in the nutrient metabolism of carnivorous fish,the ef fective conv...Carnivorous fish have poor tolerance to carbohydrate in feed and low utilization rate of carbohydrate.Therefore,the balance of carbohydrate and lipids in the nutrient metabolism of carnivorous fish,the ef fective conversion and utilization of carbohydrate and lipids,and the feedback regulation of feeding are the key links for the e fficient utilization of carnivorous fish feed.Carbohydrate response element binding protein(ChREBP)is a new transcription factor found in recent years in the glucose signaling pathway,and can also participate in feeding regulation.We performed in-vivo and in-vitro experiments to reveal the role of ChREBP in the glucose metabolism and feeding in mandarin fish.The mRNA expression of ChREBP and appetite regulatory factors were measured after intraperitoneal injection of glucose in mandarin fish Siniperca chuatsi and cotransfection with glucose and glucose+siRNA in the hypothalamic cells in mandarin fish.The results reveal that at hour 2 and 4 post intraperitoneal injection with 1 mg/g BW glucose,the blood glucose level of the mandarin fish increased significantly,but food intake decreased significantly,and it also displayed a significantly increased ChREBP mRNA expression levels in liver.At hour 4 post injection,hypothalamic ChREBP mRNA level was significantly increased,whereas the mRNA expression levels of appetite genes neuropeptide Y(npy)and agouti-related peptide(AgRP)were decreased significantly.When the glucose concentration was 40 mmol/L,the expression level of ChREBP mRNA in mandarin fish hypothalamic cells was significantly up-regulated,but the expression level of appetite gene npy mRNA was down-regulated.When siRNA and glucose were co-transfected into mandarin fish brain cells,the expression level of chrebp mRNA was significantly decreased,and the appetite gene npy mRNA was significantly increased.The results indicated that glucose regulated food intake through the modulation of appetite gene npy by ChREBP.展开更多
Mandarin在(pinyin:zài)is the most frequently used character in representing spatial and temporal relationship.Current studies mostly focus on its lexical meaning and syntactic structure while cognitive features o...Mandarin在(pinyin:zài)is the most frequently used character in representing spatial and temporal relationship.Current studies mostly focus on its lexical meaning and syntactic structure while cognitive features of its grammatical categories have been neglected.This paper investigates into the categorization of zài by conducting a morphosyntactic test among College English majors in China.The results show that:prototypes are organizing the grammatical categories of zài at all levels in terms of intra-categorial gradience;the semantic construal of zài construction could significantly influence the accuracy of the grammatical categorization of zài;the syntactic structure can provide viable cue for the identification of grammatical categories of zài;spatiality,temporality and the status of existing are three essential semantic features encoded by zài,the concurrence of which leads to various degree of inter-categorial vagueness,indicating a conflict between the rigid grammatical classification and the indeterminate nature of the grammatical functions of zai,suggesting the necessity to reconsider the efficacy of applying indiscriminately the Anglo-Saxon grammar into the study of Chinese spatial-temporal constructions.展开更多
[Objectives]To protect the local rare citrus germplasm resources and further develop and cultivate new citrus varieties.[Methods]The germplasm resources of Shatangju(Citrus flamea Hort.Ex Tseng Shiyueju)in Sihui City ...[Objectives]To protect the local rare citrus germplasm resources and further develop and cultivate new citrus varieties.[Methods]The germplasm resources of Shatangju(Citrus flamea Hort.Ex Tseng Shiyueju)in Sihui City of Guangdong Province and other 8 citrus varieties from the same origin were evaluated.The appearance characteristics of tree shape,the length and thickness of shoot at each shoot stage,the appearance characteristics of leaves and the fruit quality of each variety were investigated.[Results]Through the comparison of various citrus varieties grafted with sour mandarin,the results showed that the overall advantages of the length and thickness of the shoots of Shatang tangerine in summer and autumn were more prominent,which was conducive to fruit setting.The sprouting time of the three shoots of each variety was different,and there were sporadic sprouting phenomena in different seasons,so the growth was different,and the length and thickness of the shoots were different in different seasons.There were significant differences in shoot length and diameter among different varieties in the same season.The coefficient of variation of Shatangju's leaves was low,and the traits were stable;leaf shape,leaf base shape,leaf margin and other indicators among the three shoots of the same variety and the differences among the same shoots of different varieties were compared.All varieties had strong flavor,separately sweet and sour,sweet and sweet taste.Shatangju has many segments,orange pericarp,rough texture,easy peeling,and high oblate fruit shape.The orange pericarp was favored by the participants,while the rough and thick peel was not favored by the participants.[Conclusions]Based on the improvement of local varieties,it is recommended to improve the smoothness of pericarp,reducing the thickness of pericarp and improving the flavor of fruit will be conducive to increasing sales.In the cultivation process of various quality resources,especially in the period of fruit growth and development,the plan of nutrition and fertilization should be formulated according to the rules of fruit growth and development,the rules of yield formation and the rules of quality composition,so as to establish the integrated nutrient management system of various varieties.展开更多
From the diachronic dimension,this paper makes a two-way interactive investigation on the integration of Hong Kong Chinese and Mainland Mandarin.“Gao”is a delexical verb in contemporary Chinese.In different words an...From the diachronic dimension,this paper makes a two-way interactive investigation on the integration of Hong Kong Chinese and Mainland Mandarin.“Gao”is a delexical verb in contemporary Chinese.In different words and expressions related to“gao”character,there are mutual absorptions between Chinese mainland and Hong Kong,which is characterized by starting from nothing to something and from less to more.展开更多
Many findings have shown that positive and negative transfer from the first language influences the second language acquisition.Some observations illustrate that dialect incurs negative transfer on Mandarin learning.T...Many findings have shown that positive and negative transfer from the first language influences the second language acquisition.Some observations illustrate that dialect incurs negative transfer on Mandarin learning.Twenty-nine English learners of Huangshi dialect are surveyed about their living and education environment,their second language acquisition and Mandarin learning in an attempt to prove the existence of dialect interference on Mandarin and the second language acquisition and explain the reasons of the difference among dialect,Mandarin and the second language acquisition,based on sound analysis.展开更多
背景与目的咳嗽是肺部手术后的主要并发症之一,严重影响患者术后生活质量。保留迷走神经肺支可能降低患者术后咳嗽发生率。因此,本研究旨在探究保留迷走神经肺支是否能够降低I期肺腺癌患者术后慢性咳嗽发生率。方法前瞻性选取2022年6月...背景与目的咳嗽是肺部手术后的主要并发症之一,严重影响患者术后生活质量。保留迷走神经肺支可能降低患者术后咳嗽发生率。因此,本研究旨在探究保留迷走神经肺支是否能够降低I期肺腺癌患者术后慢性咳嗽发生率。方法前瞻性选取2022年6月至2023年6月于中国科学技术大学附属第一医院胸外科行单孔胸腔镜肺癌根治术患者125例,根据术中是否保留迷走神经肺支分为保留迷走神经肺支组(n=61)和传统组(n=64)。记录两组患者一般临床资料、围手术期情况、淋巴结清扫情况、术前及术后8周中文版莱斯特咳嗽问卷(Mandarin Chinese version of the Leicester Cough Questionnaire,LCQ-MC)评分。将两组患者根据术中淋巴结清扫后是否填塞自体脂肪或吸收性明胶海绵分为填塞组及非填塞组,比较两组亚组间LCQ-MC评分及术后慢性咳嗽情况。结果传统组术后8周LCQ-MC评分在生理、心理、社会及总分方面明显低于保留迷走神经肺支组,差异均有统计学意义(P<0.05);咳嗽患者较保留迷走神经肺支组更多(P=0.006)。保留迷走神经肺支组和传统组分别进行亚组分析,保留迷走神经肺支组患者和传统组患者中,非填塞组术后8周LCQ-MC评分均低于填塞组(P<0.05),非填塞组术后8周咳嗽患者均较填塞组更多(P=0.001,P=0.024)。结论对于I期周围型肺腺癌患者行手术治疗时,保留迷走神经肺支安全有效,能够降低患者术后慢性咳嗽发生率,提高患者术后生活质量。展开更多
背景与目的肺部切除术后慢性咳嗽是最常见的并发症之一,严重影响患者术后生活质量,目前国内尚无关于肺部切除术后慢性咳嗽预测模型。因此,本研究旨在探讨肺部切除术后慢性咳嗽相关危险因素,构建预测模型并进行验证。方法回顾性分析2021...背景与目的肺部切除术后慢性咳嗽是最常见的并发症之一,严重影响患者术后生活质量,目前国内尚无关于肺部切除术后慢性咳嗽预测模型。因此,本研究旨在探讨肺部切除术后慢性咳嗽相关危险因素,构建预测模型并进行验证。方法回顾性分析2021年1月至2023年6月于中国科学技术大学附属第一医院接受肺部切除术的499例患者的临床资料和术后咳嗽情况,按7:3随机分配原则分为训练集(n=348)和验证集(n=151),根据训练集患者术后是否慢性咳嗽分为咳嗽组和非咳嗽组。使用中文版莱斯特咳嗽问卷(The Mandarin-Chinese version of Leicester cough questionnare,LCQ-MC)评估术前、术后咳嗽的严重程度及其对患者生活质量的影响,采用咳嗽视觉模拟量表(visual analog scale,VAS)和自拟的数字评分法(numerical rating scale,NRS)评估术后慢性咳嗽,采用单因素和多因素Logistic回归分析独立危险因素和模型构建,受试者工作特征(receiver operator characteristic,ROC)曲线评估模型区分度,校准曲线评估模型的一致性,绘制决策曲线分析(decision curve analysis,DCA)评估模型的临床应用价值。结果多因素Logistic分析筛选出术前用力呼气第1秒呼气量与用力肺活量比(forced expiratory volume in the first second/forced vital capacity,FEV_(1)/FVC)、手术方式、行上纵隔淋巴结清扫、行隆突下淋巴结清扫、术后胸腔闭式引流时间是术后慢性咳嗽的独立危险因素,基于多因素分析结果构建列线图预测模型。ROC曲线下面积为0.954(95%CI:0.930-0.978),最大约登指数所对应的临界值为0.171,此时敏感度为94.7%,特异度为86.6%。Bootstrap法抽样1000次,校准曲线图预测的肺部切除术后慢性咳嗽与实际发生风险高度一致。DCA显示当预测模型概率的预概率为0.1-0.9之间,患者表现为正的净收益。结论肺部切除术后慢性咳嗽严重影响患者生活质量。列线图的可视化展现形式有助于准确预测肺部切除术后慢性咳嗽,为临床决策提供支持。展开更多
基金Supported by the China Agriculture Research System (No.CARS-46)the National Key R&D Program of China (No.2018YFD0900400)。
文摘Carnivorous fish have poor tolerance to carbohydrate in feed and low utilization rate of carbohydrate.Therefore,the balance of carbohydrate and lipids in the nutrient metabolism of carnivorous fish,the ef fective conversion and utilization of carbohydrate and lipids,and the feedback regulation of feeding are the key links for the e fficient utilization of carnivorous fish feed.Carbohydrate response element binding protein(ChREBP)is a new transcription factor found in recent years in the glucose signaling pathway,and can also participate in feeding regulation.We performed in-vivo and in-vitro experiments to reveal the role of ChREBP in the glucose metabolism and feeding in mandarin fish.The mRNA expression of ChREBP and appetite regulatory factors were measured after intraperitoneal injection of glucose in mandarin fish Siniperca chuatsi and cotransfection with glucose and glucose+siRNA in the hypothalamic cells in mandarin fish.The results reveal that at hour 2 and 4 post intraperitoneal injection with 1 mg/g BW glucose,the blood glucose level of the mandarin fish increased significantly,but food intake decreased significantly,and it also displayed a significantly increased ChREBP mRNA expression levels in liver.At hour 4 post injection,hypothalamic ChREBP mRNA level was significantly increased,whereas the mRNA expression levels of appetite genes neuropeptide Y(npy)and agouti-related peptide(AgRP)were decreased significantly.When the glucose concentration was 40 mmol/L,the expression level of ChREBP mRNA in mandarin fish hypothalamic cells was significantly up-regulated,but the expression level of appetite gene npy mRNA was down-regulated.When siRNA and glucose were co-transfected into mandarin fish brain cells,the expression level of chrebp mRNA was significantly decreased,and the appetite gene npy mRNA was significantly increased.The results indicated that glucose regulated food intake through the modulation of appetite gene npy by ChREBP.
文摘Mandarin在(pinyin:zài)is the most frequently used character in representing spatial and temporal relationship.Current studies mostly focus on its lexical meaning and syntactic structure while cognitive features of its grammatical categories have been neglected.This paper investigates into the categorization of zài by conducting a morphosyntactic test among College English majors in China.The results show that:prototypes are organizing the grammatical categories of zài at all levels in terms of intra-categorial gradience;the semantic construal of zài construction could significantly influence the accuracy of the grammatical categorization of zài;the syntactic structure can provide viable cue for the identification of grammatical categories of zài;spatiality,temporality and the status of existing are three essential semantic features encoded by zài,the concurrence of which leads to various degree of inter-categorial vagueness,indicating a conflict between the rigid grammatical classification and the indeterminate nature of the grammatical functions of zai,suggesting the necessity to reconsider the efficacy of applying indiscriminately the Anglo-Saxon grammar into the study of Chinese spatial-temporal constructions.
基金Supported by China Agricalture Research System of MOF and MARA(CARS-26)Citrus Germplasm Resources Nursery Construction Project in Sihui City of Guangdong Province(KJ-20230310-H010)。
文摘[Objectives]To protect the local rare citrus germplasm resources and further develop and cultivate new citrus varieties.[Methods]The germplasm resources of Shatangju(Citrus flamea Hort.Ex Tseng Shiyueju)in Sihui City of Guangdong Province and other 8 citrus varieties from the same origin were evaluated.The appearance characteristics of tree shape,the length and thickness of shoot at each shoot stage,the appearance characteristics of leaves and the fruit quality of each variety were investigated.[Results]Through the comparison of various citrus varieties grafted with sour mandarin,the results showed that the overall advantages of the length and thickness of the shoots of Shatang tangerine in summer and autumn were more prominent,which was conducive to fruit setting.The sprouting time of the three shoots of each variety was different,and there were sporadic sprouting phenomena in different seasons,so the growth was different,and the length and thickness of the shoots were different in different seasons.There were significant differences in shoot length and diameter among different varieties in the same season.The coefficient of variation of Shatangju's leaves was low,and the traits were stable;leaf shape,leaf base shape,leaf margin and other indicators among the three shoots of the same variety and the differences among the same shoots of different varieties were compared.All varieties had strong flavor,separately sweet and sour,sweet and sweet taste.Shatangju has many segments,orange pericarp,rough texture,easy peeling,and high oblate fruit shape.The orange pericarp was favored by the participants,while the rough and thick peel was not favored by the participants.[Conclusions]Based on the improvement of local varieties,it is recommended to improve the smoothness of pericarp,reducing the thickness of pericarp and improving the flavor of fruit will be conducive to increasing sales.In the cultivation process of various quality resources,especially in the period of fruit growth and development,the plan of nutrition and fertilization should be formulated according to the rules of fruit growth and development,the rules of yield formation and the rules of quality composition,so as to establish the integrated nutrient management system of various varieties.
文摘From the diachronic dimension,this paper makes a two-way interactive investigation on the integration of Hong Kong Chinese and Mainland Mandarin.“Gao”is a delexical verb in contemporary Chinese.In different words and expressions related to“gao”character,there are mutual absorptions between Chinese mainland and Hong Kong,which is characterized by starting from nothing to something and from less to more.
文摘Many findings have shown that positive and negative transfer from the first language influences the second language acquisition.Some observations illustrate that dialect incurs negative transfer on Mandarin learning.Twenty-nine English learners of Huangshi dialect are surveyed about their living and education environment,their second language acquisition and Mandarin learning in an attempt to prove the existence of dialect interference on Mandarin and the second language acquisition and explain the reasons of the difference among dialect,Mandarin and the second language acquisition,based on sound analysis.
文摘背景与目的咳嗽是肺部手术后的主要并发症之一,严重影响患者术后生活质量。保留迷走神经肺支可能降低患者术后咳嗽发生率。因此,本研究旨在探究保留迷走神经肺支是否能够降低I期肺腺癌患者术后慢性咳嗽发生率。方法前瞻性选取2022年6月至2023年6月于中国科学技术大学附属第一医院胸外科行单孔胸腔镜肺癌根治术患者125例,根据术中是否保留迷走神经肺支分为保留迷走神经肺支组(n=61)和传统组(n=64)。记录两组患者一般临床资料、围手术期情况、淋巴结清扫情况、术前及术后8周中文版莱斯特咳嗽问卷(Mandarin Chinese version of the Leicester Cough Questionnaire,LCQ-MC)评分。将两组患者根据术中淋巴结清扫后是否填塞自体脂肪或吸收性明胶海绵分为填塞组及非填塞组,比较两组亚组间LCQ-MC评分及术后慢性咳嗽情况。结果传统组术后8周LCQ-MC评分在生理、心理、社会及总分方面明显低于保留迷走神经肺支组,差异均有统计学意义(P<0.05);咳嗽患者较保留迷走神经肺支组更多(P=0.006)。保留迷走神经肺支组和传统组分别进行亚组分析,保留迷走神经肺支组患者和传统组患者中,非填塞组术后8周LCQ-MC评分均低于填塞组(P<0.05),非填塞组术后8周咳嗽患者均较填塞组更多(P=0.001,P=0.024)。结论对于I期周围型肺腺癌患者行手术治疗时,保留迷走神经肺支安全有效,能够降低患者术后慢性咳嗽发生率,提高患者术后生活质量。
文摘背景与目的肺部切除术后慢性咳嗽是最常见的并发症之一,严重影响患者术后生活质量,目前国内尚无关于肺部切除术后慢性咳嗽预测模型。因此,本研究旨在探讨肺部切除术后慢性咳嗽相关危险因素,构建预测模型并进行验证。方法回顾性分析2021年1月至2023年6月于中国科学技术大学附属第一医院接受肺部切除术的499例患者的临床资料和术后咳嗽情况,按7:3随机分配原则分为训练集(n=348)和验证集(n=151),根据训练集患者术后是否慢性咳嗽分为咳嗽组和非咳嗽组。使用中文版莱斯特咳嗽问卷(The Mandarin-Chinese version of Leicester cough questionnare,LCQ-MC)评估术前、术后咳嗽的严重程度及其对患者生活质量的影响,采用咳嗽视觉模拟量表(visual analog scale,VAS)和自拟的数字评分法(numerical rating scale,NRS)评估术后慢性咳嗽,采用单因素和多因素Logistic回归分析独立危险因素和模型构建,受试者工作特征(receiver operator characteristic,ROC)曲线评估模型区分度,校准曲线评估模型的一致性,绘制决策曲线分析(decision curve analysis,DCA)评估模型的临床应用价值。结果多因素Logistic分析筛选出术前用力呼气第1秒呼气量与用力肺活量比(forced expiratory volume in the first second/forced vital capacity,FEV_(1)/FVC)、手术方式、行上纵隔淋巴结清扫、行隆突下淋巴结清扫、术后胸腔闭式引流时间是术后慢性咳嗽的独立危险因素,基于多因素分析结果构建列线图预测模型。ROC曲线下面积为0.954(95%CI:0.930-0.978),最大约登指数所对应的临界值为0.171,此时敏感度为94.7%,特异度为86.6%。Bootstrap法抽样1000次,校准曲线图预测的肺部切除术后慢性咳嗽与实际发生风险高度一致。DCA显示当预测模型概率的预概率为0.1-0.9之间,患者表现为正的净收益。结论肺部切除术后慢性咳嗽严重影响患者生活质量。列线图的可视化展现形式有助于准确预测肺部切除术后慢性咳嗽,为临床决策提供支持。