Pub Date : 2003-01-01DOI: 10.1080/12265071.2003.9647694
H. Choi
Effects of genotype, settlement density and irradiance on the growth, mortality and population structure of Fucus serratus germlings were examined in the laboratory. The growth of F. serratus germlings was influenced by genotype of parent plants, which is likely to occur by microclimatic differentiation of substrata. The growth of germlings were greater at lower densities than higher densities indicating that intraspecific competition between germlings occurred within three weeks. Also, the growth of F. serratus germlings was better at 120 μmol m‐2 s‐1 than at 60 μmol m‐2 s‐1. However, mortality of germlings was determined by settlement density rather than irradiance. In population structure, skewness was increased at low irradiance and high density indicating that population structure could be changed by intraspecific competition. Thus, it is concluded that genotypic differentiation of F. serratus germlings occurred in a microgeographic scale, and the experimental density and irradiance level affected the growth of germlings.
{"title":"The effects of genotype, density and irradiance on the growth and mortality of the brown seeweed Fucus serratus germlings","authors":"H. Choi","doi":"10.1080/12265071.2003.9647694","DOIUrl":"https://doi.org/10.1080/12265071.2003.9647694","url":null,"abstract":"Effects of genotype, settlement density and irradiance on the growth, mortality and population structure of Fucus serratus germlings were examined in the laboratory. The growth of F. serratus germlings was influenced by genotype of parent plants, which is likely to occur by microclimatic differentiation of substrata. The growth of germlings were greater at lower densities than higher densities indicating that intraspecific competition between germlings occurred within three weeks. Also, the growth of F. serratus germlings was better at 120 μmol m‐2 s‐1 than at 60 μmol m‐2 s‐1. However, mortality of germlings was determined by settlement density rather than irradiance. In population structure, skewness was increased at low irradiance and high density indicating that population structure could be changed by intraspecific competition. Thus, it is concluded that genotypic differentiation of F. serratus germlings occurred in a microgeographic scale, and the experimental density and irradiance level affected the growth of germlings.","PeriodicalId":85060,"journal":{"name":"Korean journal of biological sciences","volume":"7 1","pages":"127 - 132"},"PeriodicalIF":0.0,"publicationDate":"2003-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/12265071.2003.9647694","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59655456","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 : 2003-01-01DOI: 10.1080/12265071.2003.9647685
B. Kang, Hyun Hee Kim, Kang Oh Lee
Serum lipid and lipoprotein levels are influenced by genetic factors, and exercise increases the concentrations of cardio‐protective parameters such as high‐density lipoprotein cholesterol (HDL‐cholesterol) and apolipoproteinAI (apoAI) in human serum. In the present study, we tested the effect of adaptation to endurance exercise on the association of a genetic polymorphism (Pst I RFLP) in the apoAI gene with these biochemical parameters. The genotype and allele frequencies for the Pst I RFLP were not significantly different between the elite athletes and sedentary controls (P>0.05). There were also no significant associations between the Pst I RFLP of the apoAI gene and the biochemical parameters in elite athletic group. Thus, our results suggest that the Pst I RFLP of the apoAI gene was not significantly associated with the serum apoAI and HDL‐cholesterol concentrations as well as athletic performance in Koreans.
血清脂质和脂蛋白水平受遗传因素的影响，运动增加了人类血清中高密度脂蛋白胆固醇(HDL -胆固醇)和载脂蛋白ai (apoAI)等心脏保护参数的浓度。在本研究中，我们测试了耐力运动的适应性对apoAI基因遗传多态性(Pst I RFLP)与这些生化参数的关联的影响。优秀运动员与久坐对照组的Pst I RFLP基因型和等位基因频率差异无统计学意义(P < 0.05)。apoAI基因的Pst I RFLP与优秀运动员生化指标之间也无显著相关性。因此，我们的研究结果表明，apoAI基因的Pst I RFLP与韩国人的血清apoAI和HDL -胆固醇浓度以及运动成绩没有显著相关性。
{"title":"The Pst I polymorphism of the human apolipoprotein AI gene in Korean elite athletes","authors":"B. Kang, Hyun Hee Kim, Kang Oh Lee","doi":"10.1080/12265071.2003.9647685","DOIUrl":"https://doi.org/10.1080/12265071.2003.9647685","url":null,"abstract":"Serum lipid and lipoprotein levels are influenced by genetic factors, and exercise increases the concentrations of cardio‐protective parameters such as high‐density lipoprotein cholesterol (HDL‐cholesterol) and apolipoproteinAI (apoAI) in human serum. In the present study, we tested the effect of adaptation to endurance exercise on the association of a genetic polymorphism (Pst I RFLP) in the apoAI gene with these biochemical parameters. The genotype and allele frequencies for the Pst I RFLP were not significantly different between the elite athletes and sedentary controls (P>0.05). There were also no significant associations between the Pst I RFLP of the apoAI gene and the biochemical parameters in elite athletic group. Thus, our results suggest that the Pst I RFLP of the apoAI gene was not significantly associated with the serum apoAI and HDL‐cholesterol concentrations as well as athletic performance in Koreans.","PeriodicalId":85060,"journal":{"name":"Korean journal of biological sciences","volume":"71 1","pages":"69 - 73"},"PeriodicalIF":0.0,"publicationDate":"2003-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/12265071.2003.9647685","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59655554","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 : 2003-01-01DOI: 10.1080/12265071.2003.9647704
T. Kawai, Y. Machino, H. Ko
Taxonomic confusion has been presented within freshwater crayfishes of the genus Cambaroides since Starobogatov published morphological definition and revision of the group in 1995. He suggested that Cambaroides should be revised: the C. dauricus contained three species C. dauricus, C. wladiwostokiensis, and C. koshewnikowi; the C. schrenckii with two species C. schrenckii and C. sachalinensis. Also Straovogatov did not take into account the previous data of crayfish distributions. In order to clear up the confusion, the taxonomy of crayfish sampled from Mongolia, Russia, China, and North Korea was reassessed. Starovogatov's key could not lead to the correct identification. Also, detailed observations of apical robe of the male first pleopod did not support the taxonomy on the genus Cambaroides proposed by Starobogatov in 1995. However, some local variations of morphology exist in rostrum, pleuron, and telson of Asian crayfish. Future studies should be concentrated on whether there are geographical dines of morphology or if taxonomic subdivision is necessary.
{"title":"Reassessment of cambaroides dauricus and C. schrenckii (Crustacea: Decapoda: Cambaridae)","authors":"T. Kawai, Y. Machino, H. Ko","doi":"10.1080/12265071.2003.9647704","DOIUrl":"https://doi.org/10.1080/12265071.2003.9647704","url":null,"abstract":"Taxonomic confusion has been presented within freshwater crayfishes of the genus Cambaroides since Starobogatov published morphological definition and revision of the group in 1995. He suggested that Cambaroides should be revised: the C. dauricus contained three species C. dauricus, C. wladiwostokiensis, and C. koshewnikowi; the C. schrenckii with two species C. schrenckii and C. sachalinensis. Also Straovogatov did not take into account the previous data of crayfish distributions. In order to clear up the confusion, the taxonomy of crayfish sampled from Mongolia, Russia, China, and North Korea was reassessed. Starovogatov's key could not lead to the correct identification. Also, detailed observations of apical robe of the male first pleopod did not support the taxonomy on the genus Cambaroides proposed by Starobogatov in 1995. However, some local variations of morphology exist in rostrum, pleuron, and telson of Asian crayfish. Future studies should be concentrated on whether there are geographical dines of morphology or if taxonomic subdivision is necessary.","PeriodicalId":85060,"journal":{"name":"Korean journal of biological sciences","volume":"7 1","pages":"191 - 196"},"PeriodicalIF":0.0,"publicationDate":"2003-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/12265071.2003.9647704","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59655594","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 : 2003-01-01DOI: 10.1080/12265071.2003.9647720
Sunggu Yang, Wansik Kim, Byung‐Hee Choi, Hae‐Young Koh, Chang-Joong Lee
The aim of this study is to investigate whether alcohol alters learning and memory processes pertaining to emotional and spatial factors using the active avoidance and T‐maze task in zebrafish. In the active avoidance task, zebrafish were trained to escape from one compartment to another to avoid electric shocks (unconditioned stimulus) following a conditioned light signal. Acquisition of active avoidance task appeared to be normal in zebrafish that were treated with 1% alcohol for 30 min for 17 days until the end of the behavioral test, and retention ability of learned behavior, tested 2 days later, was the same as control group. In the T‐maze task, the time to find a reservoir was compared. While the latency was similar during the 1st training session between control and alcohol‐treated zebrafish, it was significantly longer in alcohol‐treated zebrafish during retention test 24 h later. Furthermore, when alcohol was treated 30 min after 2nd session without prior treatment, zebrafish demonstrated similar retention ability compared to control. These results suggest that chronic alcohol treatment alters spatial learning of zebrafish, but not emotional learning.
{"title":"Alcohol impairs learning of T‐maze task but not active avoidance task in zebrafish","authors":"Sunggu Yang, Wansik Kim, Byung‐Hee Choi, Hae‐Young Koh, Chang-Joong Lee","doi":"10.1080/12265071.2003.9647720","DOIUrl":"https://doi.org/10.1080/12265071.2003.9647720","url":null,"abstract":"The aim of this study is to investigate whether alcohol alters learning and memory processes pertaining to emotional and spatial factors using the active avoidance and T‐maze task in zebrafish. In the active avoidance task, zebrafish were trained to escape from one compartment to another to avoid electric shocks (unconditioned stimulus) following a conditioned light signal. Acquisition of active avoidance task appeared to be normal in zebrafish that were treated with 1% alcohol for 30 min for 17 days until the end of the behavioral test, and retention ability of learned behavior, tested 2 days later, was the same as control group. In the T‐maze task, the time to find a reservoir was compared. While the latency was similar during the 1st training session between control and alcohol‐treated zebrafish, it was significantly longer in alcohol‐treated zebrafish during retention test 24 h later. Furthermore, when alcohol was treated 30 min after 2nd session without prior treatment, zebrafish demonstrated similar retention ability compared to control. These results suggest that chronic alcohol treatment alters spatial learning of zebrafish, but not emotional learning.","PeriodicalId":85060,"journal":{"name":"Korean journal of biological sciences","volume":"7 1","pages":"303 - 307"},"PeriodicalIF":0.0,"publicationDate":"2003-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/12265071.2003.9647720","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59655696","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 : 2003-01-01DOI: 10.1080/12265071.2003.9647716
V. V. Nguyễn, Y. Bae
A new euthyplociid burrowing mayfly (Polymitarcyidae, Ephemeroidea, Ephemeroptera), Polyplocia orientalis n. sp., from Vietnam is described with larval habitus and line drawings of mouthparts. The larva of the species is characterized by the mandibular tusks that bear numerous hairlike and stout setae on their dorsal and lateral surfaces and by the apical process of foretibiae that is nearly one‐fourth the length of foretarsi. Its habitat and biological data and taxonomic remarks are provided. The burrowing mayfly subfamily Euthyplociinae is reviewed from a historical perspective.
{"title":"A new euthyplociid burrowing mayfly (Ephemeroptera: Euthyplociinae, polymitarcyidae) from vietnam","authors":"V. V. Nguyễn, Y. Bae","doi":"10.1080/12265071.2003.9647716","DOIUrl":"https://doi.org/10.1080/12265071.2003.9647716","url":null,"abstract":"A new euthyplociid burrowing mayfly (Polymitarcyidae, Ephemeroidea, Ephemeroptera), Polyplocia orientalis n. sp., from Vietnam is described with larval habitus and line drawings of mouthparts. The larva of the species is characterized by the mandibular tusks that bear numerous hairlike and stout setae on their dorsal and lateral surfaces and by the apical process of foretibiae that is nearly one‐fourth the length of foretarsi. Its habitat and biological data and taxonomic remarks are provided. The burrowing mayfly subfamily Euthyplociinae is reviewed from a historical perspective.","PeriodicalId":85060,"journal":{"name":"Korean journal of biological sciences","volume":"7 1","pages":"279 - 282"},"PeriodicalIF":0.0,"publicationDate":"2003-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/12265071.2003.9647716","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59656037","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 : 2002-01-01DOI: 10.1080/12265071.2002.9647654
Joohyoung Lee, P. Johnson-Green, Eun Ju Lee
In mid‐April, 2000, hundreds of thousands of fish floated dead on the Chungnang River, one of the small branches of the Han River in Seoul. We examined the causes of the accident in detail, through analysis of monitoring data from the Han River Monitoring Project, which employed the transplanted aquatic moss, Fontinalis antipyretica. This allowed investigation of another possible cause of the fish kill: release of trace metals into the river from industrial sources during the rainfall event. In addition, we aimed to verify the usefulness of aquatic mosses as bioindicators of the event. Water samples collected 48 h after the fish kill exhibited low pH and high Total‐N and Total‐P, indicating that acidic compounds rich in nitrogen and phosphorus might be a major contaminant. BOD and COD were also very high. On the whole, the conditions of the river water were degraded at that time. Distinct trends were not observed in the chlorophyll phaeophytinization quotient and photosynthesis rate of transplanted mosses. However, mosses sampled soon after the accident exhibited the lowest values for those variables (p < 0.01), suggesting that stress factors in the river were diluted out over time. Heavy metals with characteristics of industrial effluents (Cr, Pb, Zn, Fe, Cu, and Cd) increased (p < 0.01), indicating that they were unlikely to be major causes of the accident.
{"title":"Chemical analysis of transplanted aquatic mosses and aquatic environment during a fish kill on the Chungnang river, Seoul, Korea","authors":"Joohyoung Lee, P. Johnson-Green, Eun Ju Lee","doi":"10.1080/12265071.2002.9647654","DOIUrl":"https://doi.org/10.1080/12265071.2002.9647654","url":null,"abstract":"In mid‐April, 2000, hundreds of thousands of fish floated dead on the Chungnang River, one of the small branches of the Han River in Seoul. We examined the causes of the accident in detail, through analysis of monitoring data from the Han River Monitoring Project, which employed the transplanted aquatic moss, Fontinalis antipyretica. This allowed investigation of another possible cause of the fish kill: release of trace metals into the river from industrial sources during the rainfall event. In addition, we aimed to verify the usefulness of aquatic mosses as bioindicators of the event. Water samples collected 48 h after the fish kill exhibited low pH and high Total‐N and Total‐P, indicating that acidic compounds rich in nitrogen and phosphorus might be a major contaminant. BOD and COD were also very high. On the whole, the conditions of the river water were degraded at that time. Distinct trends were not observed in the chlorophyll phaeophytinization quotient and photosynthesis rate of transplanted mosses. However, mosses sampled soon after the accident exhibited the lowest values for those variables (p < 0.01), suggesting that stress factors in the river were diluted out over time. Heavy metals with characteristics of industrial effluents (Cr, Pb, Zn, Fe, Cu, and Cd) increased (p < 0.01), indicating that they were unlikely to be major causes of the accident.","PeriodicalId":85060,"journal":{"name":"Korean journal of biological sciences","volume":"6 1","pages":"215 - 219"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/12265071.2002.9647654","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59654725","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 : 2002-01-01DOI: 10.1080/12265071.2002.9647672
M. Moon, E. K. Tillinghast
Among the silk glands in the black widow spider Latrodectus mactans, the ampullate one is the most predominant gland in both sexes, and is composed of three functional parts ‐ excretory duct, storage ampulla and convoluted tail regions. This experiment was performed using mechanical pulling stimulation with electric motor equipment to reveal a correlation between silk usage and silk producing system in this poisonous spider. The mature secretory products in glandular epithelium are closely packed and appear as electron‐opaque spherical vesicles. A part of the vesicles with fine fibrillar paracrystalline texture seems to store some proteins which will function at the time of final assembly into fibrils. Most of the secretory silk products which originated from the rough endoplasmic reticula of the glandular epithelial cells are grown by fusion with surrounding small vesicles. However, the Golgi complex does not seem to play an important role in this process of secretion. According to progressive maturation of secretory silk product, these granules are progressively filled with a fine fibrillar material, and thus appear much more electron‐dense than those of earlier states. When the secretory product is extruded from the glandular cavity, the epithelium is rapidly changed to a thinner layer of tall columnar cells with less definitive cell membranes. After extruding there are a few secretory droplets within these cells, thus causing this region to stain much lighter.
{"title":"Fine structure of the glandular epithelium during secretory silk production in the black widow spider latrodectus mactans","authors":"M. Moon, E. K. Tillinghast","doi":"10.1080/12265071.2002.9647672","DOIUrl":"https://doi.org/10.1080/12265071.2002.9647672","url":null,"abstract":"Among the silk glands in the black widow spider Latrodectus mactans, the ampullate one is the most predominant gland in both sexes, and is composed of three functional parts ‐ excretory duct, storage ampulla and convoluted tail regions. This experiment was performed using mechanical pulling stimulation with electric motor equipment to reveal a correlation between silk usage and silk producing system in this poisonous spider. The mature secretory products in glandular epithelium are closely packed and appear as electron‐opaque spherical vesicles. A part of the vesicles with fine fibrillar paracrystalline texture seems to store some proteins which will function at the time of final assembly into fibrils. Most of the secretory silk products which originated from the rough endoplasmic reticula of the glandular epithelial cells are grown by fusion with surrounding small vesicles. However, the Golgi complex does not seem to play an important role in this process of secretion. According to progressive maturation of secretory silk product, these granules are progressively filled with a fine fibrillar material, and thus appear much more electron‐dense than those of earlier states. When the secretory product is extruded from the glandular cavity, the epithelium is rapidly changed to a thinner layer of tall columnar cells with less definitive cell membranes. After extruding there are a few secretory droplets within these cells, thus causing this region to stain much lighter.","PeriodicalId":85060,"journal":{"name":"Korean journal of biological sciences","volume":"6 1","pages":"327 - 333"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/12265071.2002.9647672","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59654812","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 : 2002-01-01DOI: 10.1080/12265071.2002.9647629
Kyung-Sook Lee, Chang-Mok Lee
A new species, Dimorphostylis namhaedoensis (Cumacea, Diastylidae) is described on the basis of the specimens collected from southern shallow coast of Korean peninsula. The new species resembles four other species, D. asiatica, D. valida, D. hisuta and D. acroplicata, in having three apical spines on the terminal margin of the male telson and three pairs of the oblique ridges on the carapace, but are obviously distinguished from them in that the pattern of the ridges on the carapace is different and the third article of the antennular peduncle is very long in female. Furthermore, the dorsal carina of the female carapace has a row of forward spines and among the three apical spines of male telson, the median spine is much smaller than the lateral ones.
{"title":"A new species of the genus dimorphostylis (cumacea, diastylidae) from Korea","authors":"Kyung-Sook Lee, Chang-Mok Lee","doi":"10.1080/12265071.2002.9647629","DOIUrl":"https://doi.org/10.1080/12265071.2002.9647629","url":null,"abstract":"A new species, Dimorphostylis namhaedoensis (Cumacea, Diastylidae) is described on the basis of the specimens collected from southern shallow coast of Korean peninsula. The new species resembles four other species, D. asiatica, D. valida, D. hisuta and D. acroplicata, in having three apical spines on the terminal margin of the male telson and three pairs of the oblique ridges on the carapace, but are obviously distinguished from them in that the pattern of the ridges on the carapace is different and the third article of the antennular peduncle is very long in female. Furthermore, the dorsal carina of the female carapace has a row of forward spines and among the three apical spines of male telson, the median spine is much smaller than the lateral ones.","PeriodicalId":85060,"journal":{"name":"Korean journal of biological sciences","volume":"6 1","pages":"23 - 33"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/12265071.2002.9647629","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59654844","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 : 2002-01-01DOI: 10.1080/12265071.2002.9647659
B. Choi, Y. Gil, U. Jo
The effect of paraquat (PQ, 1,1'‐dimethyl‐4,4'‐bipyridium) on the histogenesis and glycoconjugates (GCs) properties of the pyloric region of the stomach in a perinatal rat was examined by histological and histochemical methods. Oral administration of PQ (9 mg/kg per day in 0.2 mL of D.W.) on 7 to 14 days of gestation revealed growth retardation with significant reductions in the length of pyloric gland and their pit. As for histochemical properties of GCs in the pyloric region of the stomach, the PQ‐treated rats showed some differences, such as delayed initial appearance of the sulfated GCs and lectin affinities compared with the vehicle group. These different GCs properties in the surface and gastric pit were usually detected in the fetal rats and more prominent and evident differences were revealed in the gland epithelium of the early postnatal rat. These results suggest that maternal PQ administration causes intrauterine growth retardation associated with delayed histogenesis and GCs immaturation of pyloric mucosa in developing rat.
采用组织学和组织化学方法研究了百草枯(PQ, 1,1′‐二甲基‐4,4′‐联吡啶)对围产期大鼠胃幽门区组织发生和糖缀合物(gc)特性的影响。妊娠7 ~ 14天口服PQ (9mg /kg /天，0.2 mL D.W.)显示生长迟缓，幽门腺和幽门窝的长度明显减少。在胃幽门区GCs的组织化学性质方面，PQ处理大鼠与载药组相比表现出一些差异，如硫酸化GCs的初始出现延迟和凝集素亲和力。这些不同的GCs特性在胎鼠体表和胃窝中经常被检测到，而在出生后早期的大鼠腺体上皮中表现出更为突出和明显的差异。上述结果提示，母体给药PQ导致发育大鼠宫内生长迟缓，与幽门黏膜组织发生延迟和GCs不成熟有关。
{"title":"Effect of maternal paraquat administration on the pyloric region of the developing rat stomach","authors":"B. Choi, Y. Gil, U. Jo","doi":"10.1080/12265071.2002.9647659","DOIUrl":"https://doi.org/10.1080/12265071.2002.9647659","url":null,"abstract":"The effect of paraquat (PQ, 1,1'‐dimethyl‐4,4'‐bipyridium) on the histogenesis and glycoconjugates (GCs) properties of the pyloric region of the stomach in a perinatal rat was examined by histological and histochemical methods. Oral administration of PQ (9 mg/kg per day in 0.2 mL of D.W.) on 7 to 14 days of gestation revealed growth retardation with significant reductions in the length of pyloric gland and their pit. As for histochemical properties of GCs in the pyloric region of the stomach, the PQ‐treated rats showed some differences, such as delayed initial appearance of the sulfated GCs and lectin affinities compared with the vehicle group. These different GCs properties in the surface and gastric pit were usually detected in the fetal rats and more prominent and evident differences were revealed in the gland epithelium of the early postnatal rat. These results suggest that maternal PQ administration causes intrauterine growth retardation associated with delayed histogenesis and GCs immaturation of pyloric mucosa in developing rat.","PeriodicalId":85060,"journal":{"name":"Korean journal of biological sciences","volume":"6 1","pages":"247 - 252"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/12265071.2002.9647659","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59654916","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 : 2002-01-01DOI: 10.1080/12265071.2002.9647665
Daesik Park, Shi‐Ryong Park
Functional characterization of sex pheromones in olfactory responses is essential for the study of chemical communications in amphibians. Using Y‐maze olfactory preference tests, we have investigated the olfactory responses of male and female red‐spotted newts, Notophthalmus viridescens, to the crude extracts of the opposite sex's genial and cloacal pheromones. Both male and female cloacal pheromone extracts caused the opposite sex to initiate olfactory responses by leaving the starting area in the Y‐maze, but only subject males exposed to female cloacal pheromone extracts completed olfactory choice by entering the side arm of the Y‐maze which received the pheromones. For genial pheromone extracts, only female genial pheromone extracts induced initial olfactory responses from test males. Neither male nor female genial pheromone extracts made the opposite sex complete olfactory choice. Pre‐exposure of test females to male pheromone extracts increased the likelihood of initial olfactory responses. The latency for initial olfactory responses of test females that were previously exposed to male genial extracts was significantly shorter than that of control females.
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