Pub Date : 2019-10-28DOI: 10.32011/txjsci_71_1_note6
J. Cepeda
{"title":"THE 1978 CANYON (TEXAS) FLOOD – AN ESTIMATION OF FLOOD MAGNITUDE IN PALO DURO CANYON STATE PARK","authors":"J. Cepeda","doi":"10.32011/txjsci_71_1_note6","DOIUrl":"https://doi.org/10.32011/txjsci_71_1_note6","url":null,"abstract":"","PeriodicalId":54431,"journal":{"name":"The Texas Journal of Science","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69517766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-09-06DOI: 10.32011/txjsci_71_1_article9
K. K. Onchoke, Jorge J. Ojeda
Three mono-nitrobenzanthrone isomers (1-, 2-, and 3-nitrobenzanthrone; 1-, 2-, and 3-NBA) were synthesized by reacting benzanthrone (BA) with nitric acid (HNO3) in acetic anhydride at ice-cold conditions. The major product, 2-nitrobenzanthrone (2-NBA), was confirmed using GC-MS via comparisons with a standard sample. On the basis of the elution profiles and fragmentation patterns two other isomers formed were assigned to 1-, and 3-nitrobenzanthrone (1-, and 3-NBA). The average percent yields of 1-, 2-, and 3-NBA were 0.3 ± 0.1%, 10.5 ± 2.6 %, and 6.4 ± 1.3 %, respectively.
{"title":"SYNTHESIS OF 2-, AND 3-NITROBENZANTHRONE VIA DIRECT NITRATION OF BENZANTHRONE WITH NITRIC ACID/ACETIC ACID","authors":"K. K. Onchoke, Jorge J. Ojeda","doi":"10.32011/txjsci_71_1_article9","DOIUrl":"https://doi.org/10.32011/txjsci_71_1_article9","url":null,"abstract":"\u0000 Three mono-nitrobenzanthrone isomers (1-, 2-, and 3-nitrobenzanthrone; 1-, 2-, and 3-NBA) were synthesized by reacting benzanthrone (BA) with nitric acid (HNO3) in acetic anhydride at ice-cold conditions. The major product, 2-nitrobenzanthrone (2-NBA), was confirmed using GC-MS via comparisons with a standard sample. On the basis of the elution profiles and fragmentation patterns two other isomers formed were assigned to 1-, and 3-nitrobenzanthrone (1-, and 3-NBA). The average percent yields of 1-, 2-, and 3-NBA were 0.3 ± 0.1%, 10.5 ± 2.6 %, and 6.4 ± 1.3 %, respectively.","PeriodicalId":54431,"journal":{"name":"The Texas Journal of Science","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44661087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-09-06DOI: 10.32011/txjsci_71_1_article8
Darean A. Bague, R. Franks
Biodiesel fuels are produced via transesterification of a triacylglycerol (TAG, e.g. vegetable oil, waste cooking oil, or animal fats) with a short-chain alkyl alcohol in the presence of a suitable catalyst. Alternative TAG sources, ones not derived from plants used as human food sources, have been of particular recent interest. In this work, the oil extracted from the endosperm of acorns, acorn kernel oil (AKO), was used as an alternative TAG source for the synthesis of biodiesel fuels. Acorns were collected from various species of oak trees (Quercus spp.) in the city of Nacogdoches, Texas. AKO was extracted from the acorn endosperm. The AKO was then subjected to acid-catalyzed and base-catalyzed transesterification with methanol and ethanol to produce acorn kernel oil methyl esters (AKOME) and acorn kernel oil ethyl esters (AKOEE) respectively. Concentrated H2SO4 was used as the acid catalyst and K2CO3 was used as the base catalyst. The effect of using a room temperature ionic liquid on percentage conversion for base-catalyzed transesterification was also investigated. Product mixtures were characterized using 1H-NMR spectroscopy. The NMR data were used to confirm the presence of transesterified products as well as to quantify the percentage conversion for the reaction. Percent conversion results ranged from 96 to 98% for AKOME products and 96 to 97% for AKOEE products.
{"title":"SYNTHESIS AND CHARACTERIZATION OF FATTY ACID METHYL ESTER MIXTURES DERIVED FROM ACORN KERNEL OIL","authors":"Darean A. Bague, R. Franks","doi":"10.32011/txjsci_71_1_article8","DOIUrl":"https://doi.org/10.32011/txjsci_71_1_article8","url":null,"abstract":"\u0000 Biodiesel fuels are produced via transesterification of a triacylglycerol (TAG, e.g. vegetable oil, waste cooking oil, or animal fats) with a short-chain alkyl alcohol in the presence of a suitable catalyst. Alternative TAG sources, ones not derived from plants used as human food sources, have been of particular recent interest. In this work, the oil extracted from the endosperm of acorns, acorn kernel oil (AKO), was used as an alternative TAG source for the synthesis of biodiesel fuels. Acorns were collected from various species of oak trees (Quercus spp.) in the city of Nacogdoches, Texas. AKO was extracted from the acorn endosperm. The AKO was then subjected to acid-catalyzed and base-catalyzed transesterification with methanol and ethanol to produce acorn kernel oil methyl esters (AKOME) and acorn kernel oil ethyl esters (AKOEE) respectively. Concentrated H2SO4 was used as the acid catalyst and K2CO3 was used as the base catalyst. The effect of using a room temperature ionic liquid on percentage conversion for base-catalyzed transesterification was also investigated. Product mixtures were characterized using 1H-NMR spectroscopy. The NMR data were used to confirm the presence of transesterified products as well as to quantify the percentage conversion for the reaction. Percent conversion results ranged from 96 to 98% for AKOME products and 96 to 97% for AKOEE products.","PeriodicalId":54431,"journal":{"name":"The Texas Journal of Science","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42320180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-09-05DOI: 10.32011/txjsci_71_1_article6
T. N. Johnson, Karl L. Kosciuch, P. Sikes, K. Arnold
We examined age-related reproductive success and the short-term consequences of dispersal by known-aged Cliff Swallows (Petrochelidon pyrrhonota) breeding in Texas from 1975–86. Clutch size increased with age in females, and males and females ≥2 yrs old fledged more young than yearlings. Sixteen percent (76/463) of birds dispersed between breeding seasons and we observed female-biased dispersal. Birds that dispersed to a different colony at age 2 produced 0.91 fewer fledglings post-dispersal compared to the previous year, and birds that dispersed at age 3 produced 0.34 more fledglings post-dispersal compared to the previous year; females experienced greater benefits than males when they dispersed at age 3 yrs. Younger dispersers incur short-term costs which might have important consequences for lifetime reproductive success for a short-lived passerine. However, potential population-level consequences from dispersal costs is likely minimal given the low rate of dispersal we observed.
{"title":"INFLUENCE OF AGE AND DISPERSAL ON REPRODUCTIVE SUCCESS OF CLIFF SWALLOWS (PETROCHELIDON PYRRHONATA)","authors":"T. N. Johnson, Karl L. Kosciuch, P. Sikes, K. Arnold","doi":"10.32011/txjsci_71_1_article6","DOIUrl":"https://doi.org/10.32011/txjsci_71_1_article6","url":null,"abstract":"\u0000 We examined age-related reproductive success and the short-term consequences of dispersal by known-aged Cliff Swallows (Petrochelidon pyrrhonota) breeding in Texas from 1975–86. Clutch size increased with age in females, and males and females ≥2 yrs old fledged more young than yearlings. Sixteen percent (76/463) of birds dispersed between breeding seasons and we observed female-biased dispersal. Birds that dispersed to a different colony at age 2 produced 0.91 fewer fledglings post-dispersal compared to the previous year, and birds that dispersed at age 3 produced 0.34 more fledglings post-dispersal compared to the previous year; females experienced greater benefits than males when they dispersed at age 3 yrs. Younger dispersers incur short-term costs which might have important consequences for lifetime reproductive success for a short-lived passerine. However, potential population-level consequences from dispersal costs is likely minimal given the low rate of dispersal we observed.","PeriodicalId":54431,"journal":{"name":"The Texas Journal of Science","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48513498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-01DOI: 10.32011/TXJSCI_71_1_ARTICLE2
Wendy J. Leonard, O. V. Auken
In the past, grasslands and savannas were common in many areas of south-central Texas, including the San Antonio area. With the advent of European settlers and their livestock, much of this area was converted to agriculture and rangeland. Today, most of San Antonio is developed, but some preservation has occurred. Restored grassland, mechanically cleared of Juniperus ashei (juniper, Ashe juniper) and other woody species in 2013, was examined and compared to adjacent non-cleared woodland. The woodland examined was dominated by Diospyros texana (Texas persimmon) and Juniperus ashei. Richness in the woodland canopy was 15 species. The understory below the canopy had 25 woody species. In the restored grassland area, herbaceous plant cover was 41.8%, woody plant cover 5.8%, bare soil 2.9%, and litter cover 49.5%. Species richness was 71, with 60 herbaceous and 11 woody species (percent cover of each from <0.1–7.1%). The most common species in the restored grassland in descending order were Nassella leucotricha (Texas winter grass), Calyptocarpus vialis (straggler daisy), Carex planostachys (cedar sedge), Sporobolus crypandrus (sand dropseed), D. texana, and Verbesina virginica (frost weed). Several C4 grass species were present with low cover but may increase in abundance over time. Four of the six most common restored grassland species were present below the woodland canopy and 12 woody species were present in the restored grassland as juveniles. Cost of restoration was approximately $38,500 ($7,500 supplies, $31,000 labor).
{"title":"RESTORATION OF FORMER GRASSLAND IN SOUTH-CENTRAL TEXAS","authors":"Wendy J. Leonard, O. V. Auken","doi":"10.32011/TXJSCI_71_1_ARTICLE2","DOIUrl":"https://doi.org/10.32011/TXJSCI_71_1_ARTICLE2","url":null,"abstract":"\u0000 In the past, grasslands and savannas were common in many areas of south-central Texas, including the San Antonio area. With the advent of European settlers and their livestock, much of this area was converted to agriculture and rangeland. Today, most of San Antonio is developed, but some preservation has occurred. Restored grassland, mechanically cleared of Juniperus ashei (juniper, Ashe juniper) and other woody species in 2013, was examined and compared to adjacent non-cleared woodland. The woodland examined was dominated by Diospyros texana (Texas persimmon) and Juniperus ashei. Richness in the woodland canopy was 15 species. The understory below the canopy had 25 woody species. In the restored grassland area, herbaceous plant cover was 41.8%, woody plant cover 5.8%, bare soil 2.9%, and litter cover 49.5%. Species richness was 71, with 60 herbaceous and 11 woody species (percent cover of each from <0.1–7.1%). The most common species in the restored grassland in descending order were Nassella leucotricha (Texas winter grass), Calyptocarpus vialis (straggler daisy), Carex planostachys (cedar sedge), Sporobolus crypandrus (sand dropseed), D. texana, and Verbesina virginica (frost weed). Several C4 grass species were present with low cover but may increase in abundance over time. Four of the six most common restored grassland species were present below the woodland canopy and 12 woody species were present in the restored grassland as juveniles. Cost of restoration was approximately $38,500 ($7,500 supplies, $31,000 labor).","PeriodicalId":54431,"journal":{"name":"The Texas Journal of Science","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45763477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-01DOI: 10.32011/TXJSCI_71_1_EDITORIAL_1
K. Pannell
{"title":"2019, THE UN-DESIGNATED INTERNATIONAL YEAR OF THE PERIODIC TABLE OF CHEMICAL ELEMENTS: A PERSONAL ASSESSMENT AND EXPLORATION","authors":"K. Pannell","doi":"10.32011/TXJSCI_71_1_EDITORIAL_1","DOIUrl":"https://doi.org/10.32011/TXJSCI_71_1_EDITORIAL_1","url":null,"abstract":"","PeriodicalId":54431,"journal":{"name":"The Texas Journal of Science","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45578486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-01DOI: 10.32011/txjsci_71_1_editorial_2
Travis J. LaDuc, M. Terry, Marsha E. May, J. Wolfe, S. K. Hill, K. Pannell, F. Gonzalez-Lima, Alyx S. Frantzen
{"title":"THE PROPOSED U.S.-MEXICO BORDER BARRIER: THE WRITING IS ON THE WALL","authors":"Travis J. LaDuc, M. Terry, Marsha E. May, J. Wolfe, S. K. Hill, K. Pannell, F. Gonzalez-Lima, Alyx S. Frantzen","doi":"10.32011/txjsci_71_1_editorial_2","DOIUrl":"https://doi.org/10.32011/txjsci_71_1_editorial_2","url":null,"abstract":"","PeriodicalId":54431,"journal":{"name":"The Texas Journal of Science","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43249665","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-01DOI: 10.32011/TXJSCI_71_1_ARTICLE5
Kerry L. Griffis‐Kyle, A. E. Parker, J. Götting
The addition of desert water developments alleviates water stress for a variety of organisms and is likely necessary for some species as water availability from other isolated water sources declines with climate change. However, constructed water catchments are different structurally and do not cycle water the same way as natural sites. We assessed whether these novel habitats, the constructed catchments of the Sonoran Desert, function as ecological equivalents of the natural waters and evaluated their effects on macroinvertebrate biodiversity, community composition, and trophic function. We documented an accumulation of ammonia and less diversity and different taxa assemblages in the novel habitat. We also documented a more heterotrophic food web in the natural water basins that are more dependent on resource pulses, and a more autotrophic food web in novel habitats that are more dependent on primary production from the open catchment basin. As natural resource managers continue to add constructed waters to mitigate for climate change induced declines in water availability, organisms are more likely to encounter these novel habitats as they disperse. Consequently, by increasing the density of these novel habitats we are having a measurable effect on the types of species and trophic groups present as well as the ecosystem cycling of energy and nutrients across the desert landscape. The consequences of these shifts in invertebrate community composition and ecosystem cycling on the larger desert ecosystem is unknown.
{"title":"NOVEL TEMPORARY AQUATIC HABITATS AND DESERT INVERTEBRATE COMMUNITIES","authors":"Kerry L. Griffis‐Kyle, A. E. Parker, J. Götting","doi":"10.32011/TXJSCI_71_1_ARTICLE5","DOIUrl":"https://doi.org/10.32011/TXJSCI_71_1_ARTICLE5","url":null,"abstract":"\u0000 The addition of desert water developments alleviates water stress for a variety of organisms and is likely necessary for some species as water availability from other isolated water sources declines with climate change. However, constructed water catchments are different structurally and do not cycle water the same way as natural sites. We assessed whether these novel habitats, the constructed catchments of the Sonoran Desert, function as ecological equivalents of the natural waters and evaluated their effects on macroinvertebrate biodiversity, community composition, and trophic function. We documented an accumulation of ammonia and less diversity and different taxa assemblages in the novel habitat. We also documented a more heterotrophic food web in the natural water basins that are more dependent on resource pulses, and a more autotrophic food web in novel habitats that are more dependent on primary production from the open catchment basin. As natural resource managers continue to add constructed waters to mitigate for climate change induced declines in water availability, organisms are more likely to encounter these novel habitats as they disperse. Consequently, by increasing the density of these novel habitats we are having a measurable effect on the types of species and trophic groups present as well as the ecosystem cycling of energy and nutrients across the desert landscape. The consequences of these shifts in invertebrate community composition and ecosystem cycling on the larger desert ecosystem is unknown.","PeriodicalId":54431,"journal":{"name":"The Texas Journal of Science","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46304794","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-01DOI: 10.32011/TXJSCI_71_1_ARTICLE4
Todd. R. Bollinger
Crocodylians are known for their ability to vocalize throughout their lives in a variety of social and ecological contexts, particularly during their vulnerable juvenile life stage. However, few studies have analyzed juvenile calls in laboratory settings, fewer still have analyzed them across large sample sizes or with respect to sex and body size, and no studies to date have analyzed crocodylian vocalizations with respect to human conditioning in captivity or animal personality profiles. This study tests juvenile American alligators' (Alligator mississippiensis) ability to respond via movement and callback vocalizations to pre-recorded conspecific contact calls across a large sample size (n=36), and tests for relationships between response rates and juvenile body size and sex. Seventeen and sixteen individuals out of a total of thirty-six responded via movement toward the source of pre-recorded vocalizations across the first and second experimental trials, respectively, whereas none responded through movement toward control sounds; 75% of juveniles who vocalized did so only in response to contact calls rather than controls (though the latter difference was not significant given that only four vocalized in Trial 1, and only a single animal vocalized in Trial 2); there was also no significant difference in movement toward recorded vocalizations across size or sex. However, one particularly vocal individual whose upbringing in captivity was known was identified as a possible unique personality profile given its propensity for callback vocalizations in comparison to its fellow study subjects.
{"title":"RESPONSES OF JUVENILE AMERICAN ALLIGATORS (ALLIGATOR MISSISSIPPIENSIS) TO CONTACT CALLS","authors":"Todd. R. Bollinger","doi":"10.32011/TXJSCI_71_1_ARTICLE4","DOIUrl":"https://doi.org/10.32011/TXJSCI_71_1_ARTICLE4","url":null,"abstract":"\u0000 Crocodylians are known for their ability to vocalize throughout their lives in a variety of social and ecological contexts, particularly during their vulnerable juvenile life stage. However, few studies have analyzed juvenile calls in laboratory settings, fewer still have analyzed them across large sample sizes or with respect to sex and body size, and no studies to date have analyzed crocodylian vocalizations with respect to human conditioning in captivity or animal personality profiles. This study tests juvenile American alligators' (Alligator mississippiensis) ability to respond via movement and callback vocalizations to pre-recorded conspecific contact calls across a large sample size (n=36), and tests for relationships between response rates and juvenile body size and sex. Seventeen and sixteen individuals out of a total of thirty-six responded via movement toward the source of pre-recorded vocalizations across the first and second experimental trials, respectively, whereas none responded through movement toward control sounds; 75% of juveniles who vocalized did so only in response to contact calls rather than controls (though the latter difference was not significant given that only four vocalized in Trial 1, and only a single animal vocalized in Trial 2); there was also no significant difference in movement toward recorded vocalizations across size or sex. However, one particularly vocal individual whose upbringing in captivity was known was identified as a possible unique personality profile given its propensity for callback vocalizations in comparison to its fellow study subjects.","PeriodicalId":54431,"journal":{"name":"The Texas Journal of Science","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45826105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-01DOI: 10.32011/TXJSCI_71_1_NOTE2
Matthew L Sheik, A. Nelson
{"title":"COUNTY RECORDS AND MAJOR RANGE EXTENSIONS FOR ANGIOSPERMS FROM THE LAMPASAS CUT PLAIN OF THE WEST CROSS TIMBERS AND PRAIRIES IN SAN SABA AND MILLS COUNTIES, TEXAS","authors":"Matthew L Sheik, A. Nelson","doi":"10.32011/TXJSCI_71_1_NOTE2","DOIUrl":"https://doi.org/10.32011/TXJSCI_71_1_NOTE2","url":null,"abstract":"","PeriodicalId":54431,"journal":{"name":"The Texas Journal of Science","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41354739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：