检索结果-南通市图书馆

Eye Science 2024年第1期1卷 67-79页

作者：傅绮李姝萍王飞鹏田碧珊 State Key Laboratory of Ophthalmology Zhongshan Ophthalmic CenterSun Yat-sen UniversityGuangdong Provincial Key Laboratory of Ophthalmology and Visual ScienceGuangzhou 510060China

Objective:To evaluate the effectiveness of music therapy on the anxiety level and physiological response of patients undergoing ophthalmic ***:Relevant randomized controlled trials that compared the combined effect of music therapy for patients undergoing ophthalmic surgery were *** English databases and three Chinese databases were searched from inception to *** reviewers independently performed data extraction and risk of bias *** Cochrane Collaboration tool was used to assess the risk of ***-analysis was performed using Review Manager *** outcomes were overall anxiety,blood pressure,heart rate and ***:A total of 11 trials with 1,469 participants were included in the *** to standard care,music therapy had a good effect on reducing the anxiety levels of patients undergoing ophthalmic surgery(Pphysiological responses than standard care *** findings may provide accurate evidence-based guidance for the clinical implementation of music *** the future,more high-quality studies are required for verifying these results.

关键词： music therapy ophthalmic surgery anxiety physiological responses meta-analysis

physiological responses of seedlings of two oak species to flooding stress

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Forestry Studies in China 2008年第4期10卷 259-264页

作者： HE Kai-yue YANG Jing HUANG Li-bin College of Forest Resources and Environment Nanjing Forestry University Nanjing 210037 P. R. China Institute of Forest Genetics and Breeding Jiangsu Forestry Academy of Science Nanjing 211153 P. R. China

The physiological responses of 2-year-old seedlings of Nuttall＇s oak （Quercus nuttallii） and Southern red oak （***） with two treatments i.e., deep-drowning and shallow-drowning, were studied. Taxodium distichum was selected as a control. The survival rates of seedlings were calculated, the photosynthetic indices were detected by Licor-6400 photosynthetic system instrument, and the root activities of seedlings were tested by the method of triphenyltetrazolium chloride （TTC）. Results showed that： 1） By experiencing flooding for 76 d and recovering for 60 d after water was drained off, all seedlings survived under the shallow-drowning treatment. None of Q. falcata seedlings died in the deep-drowning treatment until the 49th day. The survival rate of Q. falcata in the deep-drowning treatment was 30%. 2） Within 61 d of waterlogging treatments, the net photosynthetic rate （Pn）, stomatal conductance （gs） and transpiration rate （Tr） showed a tendency of declining, but intercellular concentration of CO2 （Ci） increased. With the prolongation of flooding stress, the extents of variation for all indices under deep-drowning treatment were larger than those under the shallow-drowning treatment. The variation of Q. falcata in flooding stress was larger than that of Q. nuttallii. 3） The root vigor and alcohol dehydrogenase （ADH） activities were detected at the 61st day in flooding stress. Waterlogging obviously inhibited root activities. Shallow-drowning made root vigor of Q. nuttallii decreased by 11.7%, and for Q. falcata, by 51.88%. Shallow-drowning treatment had no remarkable effects on ADH activities of seedlings, but deep-drowning increased those of Q. nuttallii seedlings by 227.24%, and decreased those of Q. falcata seedlings by 59.22% in the meantime. We conclude that Q. nuttallii had a stronger waterlogging resistance than Q. falcata, but weaker than T. distichum.

关键词： flooding stress Quercus waterlogging resistance physiological responses

Predator-induced physiological responses in tadpoles challenged with herbicide pollution

在线全文

学校读者我要写书评

暂无评论

Current Zoology 2013年第4期59卷 475-484页

作者： Pablo BURRACO Lidia Jimenez DUARTE Ivan GOMEZ-MESTRE Ecology Evolution and Development Group Estaci6n Biol6gica de Dofiana (EBD-CSIC) E-41092 Seville Spain Av. Las Ciencias 4 2℃ 41020 Sevilla Spain

Predators induce plastic responses in multiple prey taxa, ranging from morphological to behavioral or physiological changes. In amphibians, tadpoles activate plastic responses to reduce predation risk by reducing their activity rate and altering their morphology, specifically tail depth and pigmentation. Furthermore, there is now evidence that tadpoles＇ defenses are modi- fied when predators combine with other stressful factors such as pollutants or competitors, but our knowledge on the physiologi- cal responses underlying these responses is still scarce. Here we study physiological responses in Pelobates cultripes tadpoles exposed to a natural predator （larvae of the aquatic beetle Dytiscus circumflexus）, non-lethal concentrations of herbicide （gly- phosate, 0.5 mg/L and 1.0 mg/L） or both factors combined. We measured corticosterone levels, standard metabolic rate, oxidative damage （TBARS） and activity of antioxidant enzymes, and immune response （via leukocyte count）. Tadpoles reduced their corti- costerone concentration by ca. 24% in the presence of predator cues, whereas corticosterone did not change in the presence of glyphosate. Two enzymes involved in antioxidant response also decreased in the presence of predators （14.7% and 13.2% respec- tively） but not to glyphosate. Herbicide, however, increased the number of neutrophils and reduced that of lymphocytes, and had an interaction effect with predator presence. Standard metabolic rate did not vary across treatments in our experiment. Thus we show a marked physiological response to the presence of predators but little evidence for interaction between predators and low levels of herbicide. Multiple assessment of the physiological state of animals is important to understand the basis and conse- quences ofphenotypic plasticity

关键词： Inducible defenses physiological responses Corticosterone Glyphosate Spadefoot toads Oxidative stress

Effects of oxygen concentration and flow rate on cognitive ability and physiological responses in the elderly

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2013年第3期8卷 264-269页

作者： Hyun-Jun Kim Hyun-Kyung Park Dae-Woon Lim Mi-Hyun Choi Hyun-Joo Kim In-Hwa Lee Hyung-Sik Kim Jin-Seung Choi Gye-Rae Tack Soon-Cheol Chung Department of Obstetrics & Gynecology Konkuk University Department of Laboratory Medicine Seoul Clinical Laboratories Department of Information & Communication Engineering Dongguk University Department of Biomedical Engineering Research Institute of Biomedical EngineeringCollege of Biomedical & Health ScienceKonkuk University

The supply of highly concentrated oxygen positively affects cognitive processing in normal young adults. However, there have been few reports on changes in cognitive ability in elderly subjects following highly concentrated oxygen administration. This study investigated changes in cognitive ability, blood oxygen saturation （%）, and heart rate （beats/min） in normal elderly subjects at three different levels of oxygen [21% （1 L/min）, 93% （1 L/min）, and 93% （5 L/min）] administered during a 1-back task. Eight elderly male （75.3 ＋ 4.3 years old） and 10 female （71.1 ＋ 3.9 years old） subjects, who were normal in cognitive ability as shown by a score of more than 24 points in the Mini-Mental State Examination-Korea, participated in the experiment. The experiment consisted of an adaptation phase after the start of oxygen administration （3 minutes）, a control phase to obtain stable baseline measurements of heart rate and blood oxygen saturation before the task （2 minutes） and a task phase during which the 1-back task was performed （2 minutes）. Three levels of oxygen were administered throughout the three phases （7 minutes）. Blood oxygen saturation and heart rate were measured during each phase. Our results show that blood oxygen saturation increased, heart rate decreased, and response time in the 1-back task decreased as the concentration and amount of administered oxygen increased. This shows that administration of sufficient oxygen for optimal cognitive functioning increases blood oxygen saturation and decreases heart rate.

关键词： neural regeneration clinical practice highly concentrated oxygen cognitive task 1-back task cognitive ability blood oxygen saturation heart rate physiological responses elderly grant-supported paper neuroregeneration

Salt stress responses in foxtail millet:physiological and molecular regulation

在线全文

学校读者我要写书评

暂无评论

The Crop Journal 2023年第4期11卷 1011-1021页

作者： Changai Wu Meng Zhang Yifan Liang Lei Zhang Xianmin Diao State Key Laboratory of Crop Biology Engineering Center of Saline-alkali Soil Plant-microbial Joint RestorationShandong Agricultural UniversityTai’an 271018ShandongChina Institute of Crop Sciences Chinese Academy of Agricultural SciencesBeijing 100081China

Foxtail millet(Setaria italica L.),a member of the Paniceae family,is a temperate and tropical grass species that is widely cultivated on the Eurasian *** is Chinese in origin and possesses a small genome,short growth cycle,and strong natural abiotic stress *** the mechanism of millet tolerance to salt stress is becoming increasingly important with increasing soil salinization limiting crop *** responses and mechanisms of tolerance to salt stress from other model plants such as Arabidopsis and rice,were compared with those from foxtail millet to summarize current research on responses to salt *** processes are involved in these processes,including physiological reactions,sensing,signaling,and control at the transcriptional,post-transcriptional,and epigenetic *** increase crop productivity and agricultural sustainability,a variety of technologies can be used to investigate how salt tolerance is mediated by physiological and molecular processes in foxtail millet.

关键词： Foxtail millet Salinity physiological responses Molecular regulation Crop productivity

Can hypobaric hypoxia affect human thermal comfort?An experimental study in Tibet,China

在线全文

学校读者我要写书评

暂无评论

Journal of Central South University 2022年第7期29卷 2388-2402页

作者： DUAN Guan-nan SONG Cong LIU Yan-feng WANG Deng-jia CAO Rui-xuan School of Building Services Science and Engineering Xi’an University of Architecture and TechnologyXi’an 710055China State Key Laboratory of Green Building in Western China Xi’an University of Architecture and TechnologyXi’an 710055China

Hypobaric hypoxia is the main environmental feature of the Tibetan plateau which would influence the efficiency of human metabolic heat production and the ability of thermal *** order to understand the influence of the hypoxic environment on the plateau on the thermal comfort of short-term sojourners in Tibet,China,oxygen generators were used to create oxygen-enriched environments,and physiological and psychological reactions of subjects were compared under different oxygen partial pressures(p_(O_(2)))and air temperatures(t_(a)).The results showed that subjects’thermal sensation,thermal comfort and mean skin temperature decreased with a decrease in the oxygen partial *** t_(a)=17℃,the influence of oxygen partial pressure was more pronounced,compared to p_(O_(2))=16.4 kPa,the thermal sensation of subjects under p_(O_(2))=13.7 kPa decreased by 33%.The rate of subjects feeling comfortable decreased by 25%,and the mean skin temperature decreased by 0.7℃.The hypoxic environment of the plateau exacerbates human ***,it is necessary to fully understand the actual thermal requirements of sojourners in Tibet,*** results of this study would have implications for a better understanding of thermal comfort characteristics in the hypoxia environment in plateau.

关键词： thermal comfort hypoxia high altitude oxygen enrichment physiological responses short-term sojourner

Heavy metal accumulation characteristics and physiological response of Sabina chinensis and Platycladus orientalis to atmospheric pollution

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2022年第2期34卷 192-201页

作者： Ning Cui Laiye Qu Gang Wu State Key Laboratory of Urban and Regional Ecology Research Center for Eco-environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China

Heavy metal(Cu,Mn,Zn,Pb,and Cd)concentrations were measured in the leaves of Sabina chinensis and Platycladus orientalis collected from urban,suburban,and rural sites in Tianjin,*** pigment contents,reactive oxygen species content,malondialdehyde(MDA)content and antioxidant enzyme activity were investigated,providing physiological response *** comparison of the sites revealed that urbanization significantly influenced the heavy metal concentrations in both plant *** the rural site,both plant leaves exhibited the lowest heavy metal *** highest Cu,Mn,and Zn concentrations were found in *** leaves from the urban site;the highest Pb and Cd concentrations were found in *** leaves from the urban *** results indicate that the urban site contained larger heavy metal concentrations in the plant leaves that may reflect the anthropogenic emission *** is also found that *** may be used to monitor airborne heavy metal pollution because it is highly quick response to heavy metals,while *** may be used for mitigation due to its high *** results of this study can contribute to the development of monitoring and environmental management plans by providing information on sensitive and resistant tree species for city greening in North China.

关键词： Atmospheric heavy metal pollutions Sabina chinensis Platycladus orientalis physiological responses

physiological and Molecular Analyses of Low-Salinity Stress Response in the Cuttlefish(Sepia pharaonis)Juveniles

在线全文

学校读者我要写书评

暂无评论

Journal of Ocean University of China 2022年第4期21卷 969-976页

作者： XIN Hongwei WU Kunlan YUAN Yimeng ZHAO Yun SONG Weiwei WANG Chunlin MU Changkao LI Ronghua Key Laboratory of Applied Marine Biotechnology Ministry of EducationNingbo UniversityNingbo 315832China Collaborative Innovation Center for Zhejiang Marine High-Efficiency Efficiency and Healthy Aquaculture NingboUniversityNingbo 315832China

As a stenohaline species,the survival of Sepia pharaonis can be affected by salinity *** study aimed to explore the function of decreasing salinity on the survival of Sepia pharaonis,which can provide an advanced production guide on the culture of *** in the rainy *** was gradually decreased from 29 to 22 within 48 h to acclimate *** to a low-salinity *** ten days of breeding under low-salinity of 22,the death rate was *** this process,changes in tissue and cell structures in the larval liver,biochemical indicators,and osmoregulation-related gene expression were ***-terestingly,hepatocytes in the low-salinity group were irregular,had dissolved tissue inclusions,and contained vacuolized ***-fore,low salinity caused severe damages at a cellular level that can elevate the mortality rate.A gradual decline in salinity limited the full adaptation of *** indicators and osmoregulation-related gene expression changed *** instance,the trend of malondialdehyde(MAD)as a product of lipid peroxidation reflected the degree of damage to the body by free *** antioxidant system of *** could cope with oxidative stress caused by the change in salinity to a certain ***-regulation-related genes’expression also showed an optimistic result,that is,*** responded positively to the change in sali-nity by adjusting the expression of osmoregulation-related ***,the increase in mortality at day 10 also proved the weak adaptation capability of *** study indicated that *** can adapt to a low-salinity environment with a li-mited extent.

关键词： Sepia pharaonis low salinity physiological responses biochemical indicators osmoregulation-related genes

Light shading improves the yield and quality of seed in oil-seed peony(Paeonia ostii Feng Dan)

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2018年第7期17卷 1631-1640页

作者： HAN Chen-jing WANG Qi ZHANG Hong-bao WANG Shou-hai SONG Hua-dong HAO Jian-mei DONG He-zhong Cotton Research Center Shandong Academy of Agricultural SciencesJinan 250100P.R.China Chengwu Agricultural Bureau Heze 274200P.R.China Shuangquan Town Extension Station of Agro-Technology Jinan 250303P.R.China

Tree peony seed is unique for its super-high content of unsaturated fatty acid and is thus considered as an important source of woody oil. However, photosynthetic production is greatly reduced under high light intensity and air temperature during the seed filling period, which negatively affects seed yield and quality. The objective of this study was to determine if appropriate shading improves yield and quality of seed in oilseed peony. In this study, oilseed peony trees were shaded by different density polyethylene nets from four weeks after flowering to harvest stages to form light, moderate, and severe shadings, equivalent to about 80, 40, and 20% of full solar exposure, respectively. The effects of different shadings on some physiological parameters, yield and yield components, and nutritional composition of seed were examined. Averaged across two years, light shading increased the actual net photosynthetic rate（P_n） by 16.8%, the maximum net photosynthetic rate（P_（max）） by 81.4%, chlorophyll（Chl） content by 52.8%, auxin（IAA） content by 38.1%, and gibberellic acid（GA_3） content in leaves by 6.3%; it decreased the accumulation of H_2O_2 in leaves by 24.8%, malondialdehyde（MDA） by 22%, and endogenous abscisic acid（ABA） by 8.8%, indicating that leaf senescence in late season was considerably delayed. Light shading increased seed yield, and contents of crude fat and unsaturated fatty acids by 9.7, 5.6, and 9.6%, respectively, while moderate or severe shading significantly reduced all the three parameters. Light shading increased seed weight, but moderate or severe shading reduced seed weight or follicle density. The improved seed yield under light shading was mainly due to increased seed weight, while the reduced seed yield under moderate or severe shading was mainly attributed to reduce follicle density and seed weight. The improved seed weight and content of unsaturated fatty acids under light shading was possibly due to the delayed leaf senescence. The overall r

关键词： oilseed peony shading yield nutritional compositions physiological responses

Photosynthetic efficiency, cell volume, and elemental stoichiometric ratios in Thalassirosira weissflogii under phosphorus limitation

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Oceanology and Limnology 2011年第5期29卷 1048-1056页

作者：刘胜郭志灵李涛黄晖林森杰 Key Laboratory of Marine Bio-resources Sustainable Utilization South China Sea Institute of Oceanology Chinese Academy of Sciences Graduate University of Chinese Academy of Sciences Tropical Marine Biological Research Station in Hainan Chinese Academy of Sciences Department of Marine Sciences University of Connecticut

Nutrient limitation is known to inhibit growth and metabolism and to alter elemental stoichiometric ratios in phytoplankton. In this study, physiological changes in Thalassirosira weissflogii were measured under different dissolved inorganic phosphate (DIP) regimes in semi-continuous cultures to revisit the utility of the Redfield ratio for assessing nutrient limitation. The results showed that cell size increased with decreasing DIP availability. In the P-depleted treatment (f/2-P) the cell size was 1.48 times larger than that in the P-limited (f/100) treatment and 2.67 times larger than that in the P-saturated treatment (f/2 and f/10). The fucoxanthin to chlorophyll a ratio (Fuco/chl a) was relatively stable (about 0.3) in P-saturated cultures and was 10 times higher than that in P-limited and P-depleted cultures. During the experimental period, the photosynthetic efficiency index, ?F/Fm′, was relatively stable at ~0.50 in the P-saturated cultures, but quickly declined with decreasing DIP availability. Although cellular P content showed a significant difference between the P-saturated culture (1.6 pg/cell) and the P-limited culture (0.7 pg/cell), the N/P ratio in T. weissflogii did not show a trend with DIP availability and fluctuated slightly around 25. Our results suggest that cell division in T. weissflogii is not strictly size-gated but is probably regulated by a biochemical, and hence, an elemental stoichiometric ratio threshold, and that deviation of the cellular N/P ratio from the Redfield ratio is not a reliable indicator of algal nutrient stress.

关键词： phosphorus diatom physiological responses PAM elemental ratio