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Correlations between phytohemagglutinin response and leukocyte profile,and bactericidal capacity in a wild rodent

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Integrative Zoology 2015年第3期10卷 302-310页

作者： Zhiqiang ZHANG zhijun zhao College of Animal Science and Technology Anhui Agricultural UniversityHefeiChina College of Life and Environmental Science Wenzhou UniversityWenzhouChina

phytohemagglutinin(PHA)-induced swelling is widely used to investigate cell-mediated and innate immunity across different vertebrate ***,its physiological mechanism is still an open question due to the complexity of the involved immune *** the present study,we measured the synchronous variations of PHA response,the proportion of different subtypes of leukocytes,as well as serum bactericidal capacity in circulation blood at 6,12 and 24 h after PHA versus PBS injection in striped hamster,Cricetulus ***,the results showed that PHA responses reached a peak at 6 h postinjection,then sharply declined at 12 h and 24 h *** bactericidal capacity was higher at 6 h and 12 h than at 24 *** proportion of different subtypes of leukocytes,as well as the ratio of neutrophils to lymphocytes did not display significant changes across different time ***,PHA response was positively correlated with the proportion of neutrophils and serum bactericidal *** proportion of monocytes was negatively correlated with that of eosinophils and *** proportion of basophils was negatively correlated with that of *** results indicate that earlier enhanced PHA response is important for the striped hamster to cope with changing environmental conditions due to its small body mass,and the increased components of innate immunity in circulation blood may contribute to the enhancement of PHA swelling response.

关键词： Cricetulus barabensis neutrophils phytohemagglutinin serum bactericidal capacity striped hamster

Phytolith evidence for human-plant subsistence in Yahuai Cave(Guangxi, South China) over the past 30000 years

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Science China Earth Sciences 2020年第11期63卷 1745-1757页

作者： Yan WU Guangmao XIE Limi MAO zhijun zhao Miriam BELMAKER Key Laboratory of Vertebrate Evolution and Human Origins Institute of Vertebrate Paleontology and PaleoanthropologyChinese Academy of SciencesBeijing 100044China CAS Center for Excellence in Life and Paleoenvironment Beijing 100044China College of History Culture and TourismGuangxi Normal UniversityGuilin 541001China Guangxi Institute of Cultural Relic Protection and Archaeology Nanning 530022China State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and PalaeontologyChinese Academy of SciencesNanjing 210008China Institute of Archaeology Chinese Academy of Social SciencesBeijing 100710China Department of Anthropology University of TulsaTulsaOklahoma 74104USA

South China preserves a rich archaeological record elucidating the evolution of early modern humans during the Late ***,few studies on plant utilization were conducted in this *** used phytolith analysis from Yahuai Cave,Guangxi,to infer human use of plant resources over the past 30000 *** 14C dating was used to constrain the chronological *** indicate that several economically essential species were present throughout the sequence including Urticineae(*** sp.),which appears in the lower layers of the sequence(Marine Isotope Stage 3 through Heinrich 1);bamboo and palm which appear throughout the sequence,and wild rice which appears in a clear archaeological context dating to 16000 years *** is the earliest record of wild rice in South China and a prerequisite for rice *** unique stone tool assemblages,which resemble those in north China as opposed to South China,point to the possibility that humans,seeking refuge from the colder north,brought their tool kit with them and utilized familiar northern *** South China would have served as a refuge for human populations escaping the cold,harsh climate in the north with more ameliorate conditions in the south.

关键词： Phytolith Wild rice South China Bamboo Late Pleistocene

Role of transient receptor potential vanilloid-1 in behavioral thermoregulation of the Mongolian gerbil Meriones unguiculatus

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Integrative Zoology 2022年第4期17卷 608-618页

作者： Jing WEN Tingbei BO zhijun zhao Dehua WANG State Key Laboratory of Integrated Management of Pest Insects and Rodents Institute of ZoologyChinese Academy of SciencesBeijingChina School of Life and Environmental Sciences Wenzhou UniversityWenzhouChina CAS Center for Excellence in Biotic Interactions University of Chinese Academy of SciencesBeijingChina School of Life Sciences Shandong UniversityQingdao 266237China

Ambient temperature considerably affects the physiology and behavior of *** and thermoregulatory abilities play an important role in the response to changing ambient temperature in ***,the molecular mechanisms of behavioral thermoregulation remain poorly *** receptor potential vanilloid-1(TRPV1)is activated by changes in ambient temperature and is involved in acute ***,we aimed to determine whether TRPV1 is involved in behavioral thermoregulation in wild rodents by conducting 2 *** the first,42 adult Mongolian gerbils(Meriones unguiculatus;14 per treatment)were randomly assigned to 3 housing temperatures(4,23,and 36℃for 4 *** the second,20 gerbils(10 per treatment)were randomly injected with capsaicin(TRPV1 agonist)or AMG517(TRPV1 antagonist).The results showed a significant decrease in food intake and non-shivering thermogenesis in the gerbils housed at 36℃.Additionally,there was a significant increase in the preference of gerbils housed at 4℃ to low *** expression of TRPV1 protein in the brown adipose tissue(BAT)and liver was significantly positively correlated with that of protein kinase A(PKA).The expression of TRPV1 and PKA proteins in the BAT was positively correlated with the temperature preference of the *** gerbils injected with capsaicin preferred significantly lower temperatures than the control group *** findings suggest that TRPV1 and PKA are involved in behavioral thermoregulation in Mongolian gerbils.

关键词： brown adipose tissue(BAT) capsaicin Mongolian gerbils protein kinase A(PKA) transient receptor potential vanilloid-1(TRPV1)

A Legged Small Celestial Body Landing Mechanism:Landing Simulation and Experimental Test

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Space(Science & Technology) 2023年第1期3卷 453-463页

作者： zhijun zhao Shuang Wu Jingdong zhao Yaobing Wang Chuncheng zhao Beijing Key Laboratory of Intelligent Space Robotic System Technology and Applications Beijing Institute of Spacecraft System EngineeringBeijing 100094China State Key Laboratory of Robotics and System Harbin Institute of TechnologyHarbin 150006China Department of Aerospace Science and Technology Polytechnic University of MilanMilan 20133Italy

Landing mechanism tends to rebound and turn over,and the stability time is long when landing on the small celestial *** landing performance in different conditions is necessary to be evaluated to guide the ***,landing performance evaluation is realized by *** factors affecting the landing performance including cardan element damping,foot anchors,retro-rocket thrust,landing slope angle,and landing attitude are analyzed.A microgravity platform is built to test the landing mechanism,and the consistency between the simulation and the experiment is *** the basis of simulation and experiment,some landing suggestions are proposed to improve the landing performance.

关键词： thrust mechanism landing

Variation of food availability affects male striped hamsters(Cricetulus barabensis)with different levels of metabolic rate

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Integrative Zoology 2018年第6期13卷 769-782页

作者： Jing WEN Song TAN Dehua WANG zhijun zhao College of Life and Environmental Science Wenzhou UniversityWenzhouChina State Key Laboratory of Integrated Management of Pest Insects and Rodents Institute of ZoologyChinese Academy of SciencesBeijingChina

In the present study,we examined metabolic,morphological and neurochemical changes in male striped hamsters(Cricetulus barabensis)in response to variations in food *** with low and high levels of metabolic rate(MR:L-MR and H-MR,respectively),defined by their activity MR,were *** Experiment 1,36-h food deprivation was found to significantly decrease MR levels,body fat content,mass of small and large intestines,and leptin gene expression in the white adipose tissues in male ***,L-MR males displayed decreased MR during both the day and night phases of circadian cycles,whereas H-MR males only showed a decrease in MR during the day(resting phase).These data indicate that individual differences in physical activity were associated with animals’different metabolic responses to food *** Experiment 2,both groups of males went through a 4-week fasting and re-feeding(re)paradigm.H-re males showed a persistent high level of MR,with decreased body fat content and a trending decrease in leptin mRNA expression,compared to L-re ***,our data indicate that male striped hamsters with different levels of physical activity display altered,adaptive changes in response to variations in food *** neurochemical involvement of such adaptive changes needs to be further studied.

关键词： fasting food deprivation leptin metabolic rate re-feeding

Evolution of vegetation and climate since the last glacial maximum recorded at Dahu peat site, South China

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Science China Earth Sciences 2007年第8期50卷 1209-1217页

作者： XIAO JiaYi Lü HaiBo ZHOU WeiJian zhao zhijun HAO RuiHui Department of Geographical Science Nanjing Normal UniversityNanjing 210046China State Key Laboratory of Loess and Quaternary Geology Institute of Earth EnvironmentChinese Academy of SciencesXi’an 710075China Department of History and Civilization Weinan Normal UniversityWeinan 714000China

Sporopollen analysis on a 346 cm peat record at Dahu, Jiangxi, chronologically constrained by 16 AMS 14C datings, provides an opportunity to reconstruct the vegetation evolution stages responding to cli-mate change in South China since the last glacial maximum. The result shows that during 18330-15630 cal a B.P., broad-leaved forest dominated the area, corresponding to mild, cool and fairly humid climate. At the interval of 15630-11600 cal a B.P., several evergreen broad-leaved species appeared within the broad-leaved forest, indicating moderate and humid condition. During early Holocene, broad-leaved evergreen forest community was constructed as Castanopsis/Lithorcarpus principally developed, suggesting a warm and humid scenario until 6000 cal a B. P. Since 6000 cal a B. P., abrupt forest deterioration happened with an contemporary increase of fern and herb communities, repre-senting a turnover to relatively cool and dry condition and as well, possible impact from human activi-ties. Meanwhile, several relatively cool and dry events can be identified in the sporopollen record, they can be correlated to the North Atlantic Heinrich event, YD and Holocene millennial-scale oscillations, implying that the low latitude climate was coupled with high latitude influences. Moreover, the varia-tions of temperature and humidity since LGM at Dahu were much smaller when compared with the re-cords in north monsoonal China.

关键词： peat site sporopollen analysis paleovegetation paleoenvironment

Effects of short photoperiod on energy intake,thermogenesis,and reproduction in desert hamsters(Phodopus roborovskii)

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Integrative Zoology 2015年第2期10卷 207-215页

作者： Xueying ZHANG zhijun zhao Nina VASILIEVA Anastasia KHRUSHCHOVA Dehua WANG State Key Laboratory of Integrated Management for Pest Insects and Rodents Institute of ZoologyChinese Academy of SciencesBeijingChina A.N.Severtsov Institute of Ecology and Evolution Russian Academy of SciencesMoscowRussia College of Life and Environmental Science Wenzhou UniversityWenzhouChina

Desert hamsters(Phodopus roborovskii)are the least known species in the genus Phodopus with respect to ecology and physiology,and deserve scientific attention,particularly because of their small body ***,the responses of energy metabolism and reproductive function to short photoperiods in desert hamsters were *** and female desert hamsters were acclimated to either long day(LD)(L:D 16:8 h)or short day(SD)photoperiods(L:D 8:16 h)for three months,and then the females were transferred back to an LD photoperiod for a further five months,while at the end of the SD acclimation the males were killed and measurements were taken for serum leptin as well as molecular markers for *** found that like the other two species from the genus Phodopus,the desert hamsters under SD decreased body mass,increased adaptive thermogenesis as indicated by elevated mitochondrial protein content and uncoupling protein-1 content in brown adipose tissue,and suppressed reproduction compared to those under ***,different from the other two species,desert hamsters did not show any differences in energy intake or serum leptin concentration between LD and *** data suggest that different species from the same genus respond in different ways to the environmental signals,and the desert adapted species are not as sensitive to change in photoperiod as the other two species.

关键词： desert hamster(Phodopus roborovskii) energy intake leptin reproductive function uncoupling protein-1

Removal of Basic Nitrogen Compounds from Diesel Fraction with NMP-0.5ZnCl_(2) Coordinated Ionic Liquid

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China Petroleum Processing & Petrochemical Technology 2021年第1期23卷 98-104页

作者： Li Wenshen Ren Yongqi Li Jianxiang zhao zhijun Liu Jie School of Petrochemical Engineering Liaoning Petrochemical UniversityFushun 113001 School of Innovation and Entrepreneurship Liaoning Petrochemical UniversityFushun 113001

An inexpensive coordinated ionic liquid NMP-0.5ZnCl_(2) was synthesized by reacting N-methyl-pyrrolidone with anhydrous ZnCl_(2),and its structure was characterized with FT-IR *** performance of IL for removing basic nitrogen compounds from model oil containing quinoline and actual coker diesel was *** results showed that the IL,NMP-0.5ZnCl_(2),exhibited a good denitrogenation performance,which can be attributed to its low viscosity and unoccupied orbitals of Zn ion,while obtaining a 99.68%quinoline removal efficiency under conditions covering a temperature of 50℃,an IL/model oil mass ratio of 1:2,and a reaction time of 30 *** the case of coker diesel,above a 91%basic N-removal efficiency(with N-content reduced from 536μg/g to 47μg/g)was realized by the IL after 5-stage ***,the quinoline extraction efficiency could still reach 96.73%during four recycles of the IL.

关键词： coordinated ionic liquid NMP-0.5ZnCl_(2) denitrogenation quinoline coker diesel

Strategies of behavior,energetic and thermogenesis of striped hamsters in response to food deprivation

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Integrative Zoology 2018年第1期13卷 70-83页

作者： Jing WEN Song TAN Qinggang QIAO Lulu SHI Yixin HUANG zhijun zhao College of Life and Environmental Science Wenzhou UniversityWenzhouChina

The life history of many animals includes periods of food *** behavioral strategies are involved in small mammals in response to food shortage:an increase in activity behavior,representing the increased foraging or migratory behavior,and a decrease in activity level,serving as a mechanism for conserving ***,it is uncertain whether animals adopt both strategies in response to food shortage,and whether hormone and neuroendocrine mechanisms are involved in both *** the present study,changes in behavior and metabolic rate were examined in food-deprived striped hamsters(Cricetulus barabensis).The effects of leptin supplement on activity behavior,metabolic rate and hypothalamic neuropeptide gene expression were also *** behavior of food-deprived hamsters significantly changed with photoperiod phases:with increasing activity during the dark phase compared to those fed ad libitum,whereas decreasing activity and simultaneously increasing resting behavior during the light *** metabolic rate,body mass,and masses of fat depots and digestive tracts significantly decreased in food-deprived hamsters compared with ad libitum *** supplement tended to attenuate the increased activity in the dark *** expression of hypothalamic neuropeptide Y(NPY)was significantly upregulated in food-deprived hamsters,while was significantly attenuated by exogenous *** findings suggest that both behavior strategies are important behavioral adjustments in free-living animals to cope with food *** and hypothalamic NPY gene expression may be involved in the adjustments of physiology and behavior in animals demonstrating a hyperactivity strategy in response to food shortage.

关键词： behavior food deprivation neuropeptide Y leptin striped hamster