The construction of the cables is a key step for erecting suspen-dome structures. In practical engineering, it is difficult to ensure that the designed pre-stresses of cables have been exactly introduced into the stru...The construction of the cables is a key step for erecting suspen-dome structures. In practical engineering, it is difficult to ensure that the designed pre-stresses of cables have been exactly introduced into the structures in the site; so it is necessary to evaluate the influence of the variation of the pre-stresses on the structural behavior. In the present work, an orthogonal design method was employed to investigate the pre-stressed cables' sensitivity to the suspen-dome system. The investigation was concentrated on a Kiewitt suspen-dome. Parametric studies were carried out to study the sensitivity of the structure's static behavior, dynamic behavior, and buckling loads when the pre-stresses in the cables varied. The investigation indicated that suspen-dome structures are sensitive to the pre-stresses in all cables; and that the sensitivity depended on the location of the cables and the kind of structural behavior. Useful suggestions are given at the end of the paper.展开更多
The interaction of Pb Cd can be observed not only in the uptake process of elements by plants and in their influence on the growth, but also in rhizosphere. The changes in extractable Cd and Pb concentrations in the ...The interaction of Pb Cd can be observed not only in the uptake process of elements by plants and in their influence on the growth, but also in rhizosphere. The changes in extractable Cd and Pb concentrations in the rhizosphere soil of rice plants, root exudates from wheat and wheat plant and their complexing capacity with Pb and Cd were investigated under different Pb and Cd treatments. Results showed that the concentration of extractable Cd in the rhizosphere of rice in red soil was markedly increased by Pb Cd interaction. It increased by 56% in the treatment with Pb and Cd added against that in the treatment with only Cd added in soil. The considerable differences in both composition and amount of root exudate from wheat and rice were found among different treatments. Pb and Cd might be complexed by root exudates. The concentrations of free Pb and Cd in the solution were increased markedly by adding root exudate from wheat and decreased by that from rice due to Pb Cd interaction. The distribution patterns of Pb and Cd in roots were affected by Pb Cd interaction, which accelerated transport of Pb into internal tissue and retarded accumulation of Cd in external tissue.展开更多
In the present experiment, wheat seedlings (Trticucum aestivum L.) were grown on a purple soil withvarious fertilizer treatments in order to investigate the responses of nitrogen and related eusyme activitiesin the rh...In the present experiment, wheat seedlings (Trticucum aestivum L.) were grown on a purple soil withvarious fertilizer treatments in order to investigate the responses of nitrogen and related eusyme activitiesin the rhizosphere. The results revealed the increments of both organic matter and total N in the soil withthe proximity to the growing roots, especially in the treatment of supplying pig manure in combination withchemical fertilizer, suggesting that they could come from root and microorganism exudation which could beintensified by inorganic-organic fertilization, being of benefit to improving the physical and biological envi-ronment in the rhizosphere of wheat. Much more inorganic N was observed in the fertilized soils surroundingwheat roots than in the CK treatment, indicating the improvement of crop N supply in the rhisosphere ofwheat by fertilization.The activities of invertase, urease and protease in the root zone were greatly enhanced as compared tothose in the other parts of soils except that the urease activities were similar in the rhizo8phere and nonrhi-zosphere of the CK and pig manure treatments, indicating that invertase and protease could be produced bygrowing roots and rhizosphere microorganisms, in contrast to urease which could be stimulated by urea. Also,significant increment of these three enzyme activities in the rhizosphere of wheat by fertilizatioll, especially byapplication of chemical fertilizer combined with pig manurel suggested that fertilization not only acceleratedthe renewal of organic matter but also enhanced bioavailability of organic N in that soil zone. This couldbe the reason why the total amount of inorganic N available for plants was increased more obviously in therhizosphere of wheat of the fertilization treatments than in that of the CK treatment.展开更多
Inorganic soil phosphorus extractable with sodium bicarbonate (NaHCO3-Pi), soil pH and root hairs length and density in the rhizosphere of two winter wheat cultivars (Triticum aestivum L. cv. Shichun,Sleipner) grown o...Inorganic soil phosphorus extractable with sodium bicarbonate (NaHCO3-Pi), soil pH and root hairs length and density in the rhizosphere of two winter wheat cultivars (Triticum aestivum L. cv. Shichun,Sleipner) grown on a high pH Chinese silt loam (52.7 mg NaHCO3-Pi kg-1) and a Danish sandy loam (43.4mg NaHCO3-Pi kg-1) were studied to assess how these wheat cultivars differed in phoephorus uptake.The rhizosphere soil pH of two wheat cultivars grown on the two soils were fairly unchanged with increasing distance from the root surface. However the root hairs of Shichun were 2.1 times longer than those of Sleipner. Root surface area (RSA) of Shichun increased by 192% due to root hairs whereas root hairs of Sleipner increased RSA by 68% only. Hence the root system of Shichun was in contact with more soil than that of Sleipner, even though Sleipner had a longer root. Grown at the lower pH and level of NaHCO3-Pi in the Danish soil Shichun absorbed more inorganic phosphorus than Sleipner whereas at the higher pH and level of NaHCO3-Pi in the Chinese soil there was no phosphorus uptake difference between the two wheat cultivars.展开更多
Changes of ovarian tPA,uPA and PA inhibitor activities were examined in PMSG-and hCG-treatedimmature mice during periovulatory periods.The results show that 15% of the gonadotropin-treatedanimals ovulated 8 hrs after ...Changes of ovarian tPA,uPA and PA inhibitor activities were examined in PMSG-and hCG-treatedimmature mice during periovulatory periods.The results show that 15% of the gonadotropin-treatedanimals ovulated 8 hrs after hCG administration,about 6-8 hrs earlier than in rat.It is also shownthat not only tPA activity,but also uPA activity,was regulated by gonadotropins in ovarianhomogenates and granulosa cells,and they reached maximum prior to ovulation.No measurableamount of PAI-1 activity could be detected in mouse granulosa cell conditioned medium andfollicular fluid,but considerable amount of α_2-antiplasmin,a specific inhibitor for plasmin,wasfound in follicular fluid.Cumulus-oocyte complexes contain mainly tPA.Since the ovulated eggsstill have high tPA activity,it is thought that the enzyme in the oocyte may play an important rolein implantation.展开更多
Suppose {Xi, i≥1} and {Yi, i≥1} are two independent sequences with distribution functions FX(x) and FY(x), respectively. Zi is the combination of Xi and Yi with a probability pn for each i with 1≤i≤n. The extreme ...Suppose {Xi, i≥1} and {Yi, i≥1} are two independent sequences with distribution functions FX(x) and FY(x), respectively. Zi is the combination of Xi and Yi with a probability pn for each i with 1≤i≤n. The extreme value distribution ,n GZ(x) of this particular triangular array of the i.i.d. random variables Z1, , Z2, ,…, Zn n n ,nis discussed. We found a new form of the extreme value distribution ΛA(ρx)Λ(x)(0<ρ <1), which is not max-stable. It occurs if FX(x) and FY(x) belong to the same MDA(Λ). GZ(x) does not exist as mixture forms of the different types of extreme value distributions.展开更多
In order to analyze the composition and frequency distribution of acceleration signal in the process of projectile penetrating,this paper uses wavelet transform to decompose penetration acceleration signal to get the ...In order to analyze the composition and frequency distribution of acceleration signal in the process of projectile penetrating,this paper uses wavelet transform to decompose penetration acceleration signal to get the distribution of penetration acceleration signal in different frequency bands.Compared with the ideal acceleration signal curve and its characteristics,it can be concluded that the frequency range of the acceleration signal in the axis of the projectile and the vibration frequency range of the projectile are 31.25-62.5kHz and 62.5-125 kHz,respectively.Finally,the penetration acceleration signal curve is obtained by Simulink.展开更多
The Bleeding of Stone traces a philosophical concept related to the existence of humankind. The uniqueness of the story's setting and the main character provide a metaphysical ontological dimension. The notion of the...The Bleeding of Stone traces a philosophical concept related to the existence of humankind. The uniqueness of the story's setting and the main character provide a metaphysical ontological dimension. The notion of the metaphysical existence is drawn into public within the atmosphere of the novel through certain elements; religion, time and space, and freedom. The present paper investigates on these factors and their roles and relations to convey and reach a metaphysical ontology. I argue, in this paper, that the metaphysical existence is established as a state between life and death. This state is created through a dialectical relationship between man and desert where there are unseen struggles between the two for immortality. However, the ultimate result of losing the battle is known for the man, yet deliberately ignored because oftke instinct for immortality展开更多
To study the physiological effects of small root zonel plants of a hybrid wheat variety (Triticum aestivnmL.cv. Meiyou 4) were grown in small pots (1 litre) or large pots (8 litre) with 1ow nitrogen (50 mg kg-1 soil)a...To study the physiological effects of small root zonel plants of a hybrid wheat variety (Triticum aestivnmL.cv. Meiyou 4) were grown in small pots (1 litre) or large pots (8 litre) with 1ow nitrogen (50 mg kg-1 soil)and high nitrogen (200 mg kg-1 soil). Restricting root zone decreased dry weight of plants at the stages ofstem elongation and flowering, compared to those of control plants grown in the large pots (P<0.01). Sprayingof 6-benzylaminopurine (50 μmol L-1) increased dry weight of plants and chlorop hyll concentration in leaves.Restriction of root zone decreased the concentrations of total nitrogen, chlorophyll and soluble protein in thefiag leaf and acce1erated senescence of the leaves. Supply of high nitrogen delayed senescence of the fiag leafThe results suggested that the shortage of nutrients, especially nitrogen deficiency was the primary reasonfor the decreased growth of plant in the treatment of root zone restriction.展开更多
In order to obtain the perforation depth, the three zones with different permeability because of plastic deformation and fluid invasion were studied based on related theories. The study shows that the calculation of p...In order to obtain the perforation depth, the three zones with different permeability because of plastic deformation and fluid invasion were studied based on related theories. The study shows that the calculation of perforation depth should take account of not only damaged zone, but also plastic zone, because the plastic zone has much lower permeability. The required minimum perforation depth was obtained by making the solution of elastic/plastic equations, and the factors affecting perforation depth were analyzed accordingly.展开更多
Ridgetail white prawn (Exopalaemon carinicauda) are of significant economic importance in China where they are widely cultured. However, there is little information on the basic biology of this species. We evaluated...Ridgetail white prawn (Exopalaemon carinicauda) are of significant economic importance in China where they are widely cultured. However, there is little information on the basic biology of this species. We evaluated the effect of temperature (16, 19, 22, 25, 28, 31, and 34℃) on the standard metabolic rates (SMRs) of juvenile and adult E. carinicauda in the laboratory under static conditions. The oxygen consumption rate (OCR), ammonia-N excretion rate (AER), and atornic ratio of oxygen consumed to nitrogen consumed (O:N ratio) of juvenile and adult E. carinicauda were significantly influenced by temperature (P〈0.05). Both the OCR and AER of juveniles increased significantly with increasing temperature from 16 to 34℃, but the maximum OCR for adults was at 31℃. Juvenile shrimp exhibited a higher OCR than the adults from 19 to 34℃. There was no significant difference between the AERs of the two life-stages from 16 to 31 ℃ (P〉0.05). The O:N ratio in juveniles was significantly higher than that in the adults over the entire temperature range (P〈0.05). The temperature coefficient (Q_10) of OCR and AER ranged from 5.03 to 0.86 and 6,30 to 0.85 for the adults, respectively, and from 6,09-1.03 and 3.66-1.80 for the juveniles, respectively. The optimal temperature range for growth of the juvenile and adult shrimp was from 28 to 31℃, based on Q_10 and SMR values. Results from the present study may be used to guide pond culture production ofE. carinicauda.展开更多
Patients with stage Ⅲ N2 non-small cell lung cancer (NSCLC) are more than one third of all NSCLC patients. The 5-year survival rate of them is approximately 15%. From therapeutic views, stage ⅢA N2 of 97 Internati...Patients with stage Ⅲ N2 non-small cell lung cancer (NSCLC) are more than one third of all NSCLC patients. The 5-year survival rate of them is approximately 15%. From therapeutic views, stage ⅢA N2 of 97 International Lung Cancer Staging System is an obvious hetero-combination, which includes mediastinal lymph node metastasis based on microscope after postoperative examination and N2 of single station or N2 of multiple stations based on computerized tomographic scanning and N2 of mediastinal lymph node mixed together. The different status of stage N2 lead to different prognosis. Andre et al reported the results of continuous surgery in 702 patients with NSCLC, which showed that N2 of single station based on microscope, 5-year survival rate was 34% (244 cases), N2 of multiple stations based on microscope, 5-year survival rate was 11% (788 cases), N2 of single station based on radiograph, 5-year survival rate was 8% (118 cases),展开更多
Objective: To study the efficiency, safety and feasibility of preoperative bronchial artery infusion (BAI) chemotherapy on operation in patients with locally advanced (stage Ⅲ) non-small cell lung cancer (NSCLC...Objective: To study the efficiency, safety and feasibility of preoperative bronchial artery infusion (BAI) chemotherapy on operation in patients with locally advanced (stage Ⅲ) non-small cell lung cancer (NSCLC). Methods: 92 cases with locally advanced NSCLC patients were randomly divided into two groups: (1) BAI chemotherapy group: 39 cases were received BAI chemotherapy for 2 courses and followed surgery; (2) surgery alone group: 51 cases were treated by operation alone. The complete resection rate and preoperative complications were compared between these two groups. Results: In BAI chemotherapy group, the rate of clinical efficiency was 68.3% with slight toxicity. In BAI chemotherapy group the surgery complete resection rate was 89.7%, which was significantly higher than that in surgery alone group (72.5%, P 〈 0.05). No significant differences of blood loss, operative complications and mortality were observed between these two groups. Conclusion: BAI neoadjuvant chemotherapy was safe and effective, which can increase the complete resection rate of the tumor and did not increase the operative complications and mortality.展开更多
The effects of contemporary climate,habitat heterogeneity and long-term climate change on species richness are well studied for woody plants in forest ecosystems,but poorly understood for herbaceous plants,especially ...The effects of contemporary climate,habitat heterogeneity and long-term climate change on species richness are well studied for woody plants in forest ecosystems,but poorly understood for herbaceous plants,especially in alpine–arctic ecosystems.Here,we aim to test if the previously proposed hypothesis based on the richness–environment relationship could explain the variation in richness patterns of the typical alpine–arctic herbaceous genus Saxifraga.Using a newly compiled distribution database of 437 Saxifraga species,we estimated the species richness patterns for all species,narrow-and wide-ranged species.We used generalized linear models and simultaneous autoregressive models to evaluate the effects of contemporary climate,habitat heterogeneity and historical climate on species richness patterns.Partial regressions were used to determine the independent and shared effects of different variables.Four widely used models were tested to identify their predictive power in explaining patterns of species richness.We found that temperature was negatively correlated with the richness patterns of all and wide-ranged species,and that was the most important environmental factor,indicating a strong conservatism of its ancestral temperate niche.Habitat heterogeneity and long-term climate change were the best predictors of the spatial variation of narrow-ranged species richness.Overall,the combined model containing five predictors can explain ca.40%–50%of the variation in species richness.We further argued that additional evolutionary and biogeographical processes might have also played an essential role in shaping the Saxifraga diversity patterns and should be considered in future studies.展开更多
基金Project (No. 50278086) supported by the National Natural Science Foundation of China
文摘The construction of the cables is a key step for erecting suspen-dome structures. In practical engineering, it is difficult to ensure that the designed pre-stresses of cables have been exactly introduced into the structures in the site; so it is necessary to evaluate the influence of the variation of the pre-stresses on the structural behavior. In the present work, an orthogonal design method was employed to investigate the pre-stressed cables' sensitivity to the suspen-dome system. The investigation was concentrated on a Kiewitt suspen-dome. Parametric studies were carried out to study the sensitivity of the structure's static behavior, dynamic behavior, and buckling loads when the pre-stresses in the cables varied. The investigation indicated that suspen-dome structures are sensitive to the pre-stresses in all cables; and that the sensitivity depended on the location of the cables and the kind of structural behavior. Useful suggestions are given at the end of the paper.
文摘The interaction of Pb Cd can be observed not only in the uptake process of elements by plants and in their influence on the growth, but also in rhizosphere. The changes in extractable Cd and Pb concentrations in the rhizosphere soil of rice plants, root exudates from wheat and wheat plant and their complexing capacity with Pb and Cd were investigated under different Pb and Cd treatments. Results showed that the concentration of extractable Cd in the rhizosphere of rice in red soil was markedly increased by Pb Cd interaction. It increased by 56% in the treatment with Pb and Cd added against that in the treatment with only Cd added in soil. The considerable differences in both composition and amount of root exudate from wheat and rice were found among different treatments. Pb and Cd might be complexed by root exudates. The concentrations of free Pb and Cd in the solution were increased markedly by adding root exudate from wheat and decreased by that from rice due to Pb Cd interaction. The distribution patterns of Pb and Cd in roots were affected by Pb Cd interaction, which accelerated transport of Pb into internal tissue and retarded accumulation of Cd in external tissue.
文摘In the present experiment, wheat seedlings (Trticucum aestivum L.) were grown on a purple soil withvarious fertilizer treatments in order to investigate the responses of nitrogen and related eusyme activitiesin the rhizosphere. The results revealed the increments of both organic matter and total N in the soil withthe proximity to the growing roots, especially in the treatment of supplying pig manure in combination withchemical fertilizer, suggesting that they could come from root and microorganism exudation which could beintensified by inorganic-organic fertilization, being of benefit to improving the physical and biological envi-ronment in the rhizosphere of wheat. Much more inorganic N was observed in the fertilized soils surroundingwheat roots than in the CK treatment, indicating the improvement of crop N supply in the rhisosphere ofwheat by fertilization.The activities of invertase, urease and protease in the root zone were greatly enhanced as compared tothose in the other parts of soils except that the urease activities were similar in the rhizo8phere and nonrhi-zosphere of the CK and pig manure treatments, indicating that invertase and protease could be produced bygrowing roots and rhizosphere microorganisms, in contrast to urease which could be stimulated by urea. Also,significant increment of these three enzyme activities in the rhizosphere of wheat by fertilizatioll, especially byapplication of chemical fertilizer combined with pig manurel suggested that fertilization not only acceleratedthe renewal of organic matter but also enhanced bioavailability of organic N in that soil zone. This couldbe the reason why the total amount of inorganic N available for plants was increased more obviously in therhizosphere of wheat of the fertilization treatments than in that of the CK treatment.
文摘Inorganic soil phosphorus extractable with sodium bicarbonate (NaHCO3-Pi), soil pH and root hairs length and density in the rhizosphere of two winter wheat cultivars (Triticum aestivum L. cv. Shichun,Sleipner) grown on a high pH Chinese silt loam (52.7 mg NaHCO3-Pi kg-1) and a Danish sandy loam (43.4mg NaHCO3-Pi kg-1) were studied to assess how these wheat cultivars differed in phoephorus uptake.The rhizosphere soil pH of two wheat cultivars grown on the two soils were fairly unchanged with increasing distance from the root surface. However the root hairs of Shichun were 2.1 times longer than those of Sleipner. Root surface area (RSA) of Shichun increased by 192% due to root hairs whereas root hairs of Sleipner increased RSA by 68% only. Hence the root system of Shichun was in contact with more soil than that of Sleipner, even though Sleipner had a longer root. Grown at the lower pH and level of NaHCO3-Pi in the Danish soil Shichun absorbed more inorganic phosphorus than Sleipner whereas at the higher pH and level of NaHCO3-Pi in the Chinese soil there was no phosphorus uptake difference between the two wheat cultivars.
基金This work was supported by National Natural Science Foundation,the"Eighth Five"Scientific Development Program,research fund for State Key Laboratories and Rockefeller Foundation,New York,USA.
文摘Changes of ovarian tPA,uPA and PA inhibitor activities were examined in PMSG-and hCG-treatedimmature mice during periovulatory periods.The results show that 15% of the gonadotropin-treatedanimals ovulated 8 hrs after hCG administration,about 6-8 hrs earlier than in rat.It is also shownthat not only tPA activity,but also uPA activity,was regulated by gonadotropins in ovarianhomogenates and granulosa cells,and they reached maximum prior to ovulation.No measurableamount of PAI-1 activity could be detected in mouse granulosa cell conditioned medium andfollicular fluid,but considerable amount of α_2-antiplasmin,a specific inhibitor for plasmin,wasfound in follicular fluid.Cumulus-oocyte complexes contain mainly tPA.Since the ovulated eggsstill have high tPA activity,it is thought that the enzyme in the oocyte may play an important rolein implantation.
文摘Suppose {Xi, i≥1} and {Yi, i≥1} are two independent sequences with distribution functions FX(x) and FY(x), respectively. Zi is the combination of Xi and Yi with a probability pn for each i with 1≤i≤n. The extreme value distribution ,n GZ(x) of this particular triangular array of the i.i.d. random variables Z1, , Z2, ,…, Zn n n ,nis discussed. We found a new form of the extreme value distribution ΛA(ρx)Λ(x)(0<ρ <1), which is not max-stable. It occurs if FX(x) and FY(x) belong to the same MDA(Λ). GZ(x) does not exist as mixture forms of the different types of extreme value distributions.
文摘In order to analyze the composition and frequency distribution of acceleration signal in the process of projectile penetrating,this paper uses wavelet transform to decompose penetration acceleration signal to get the distribution of penetration acceleration signal in different frequency bands.Compared with the ideal acceleration signal curve and its characteristics,it can be concluded that the frequency range of the acceleration signal in the axis of the projectile and the vibration frequency range of the projectile are 31.25-62.5kHz and 62.5-125 kHz,respectively.Finally,the penetration acceleration signal curve is obtained by Simulink.
文摘The Bleeding of Stone traces a philosophical concept related to the existence of humankind. The uniqueness of the story's setting and the main character provide a metaphysical ontological dimension. The notion of the metaphysical existence is drawn into public within the atmosphere of the novel through certain elements; religion, time and space, and freedom. The present paper investigates on these factors and their roles and relations to convey and reach a metaphysical ontology. I argue, in this paper, that the metaphysical existence is established as a state between life and death. This state is created through a dialectical relationship between man and desert where there are unseen struggles between the two for immortality. However, the ultimate result of losing the battle is known for the man, yet deliberately ignored because oftke instinct for immortality
文摘To study the physiological effects of small root zonel plants of a hybrid wheat variety (Triticum aestivnmL.cv. Meiyou 4) were grown in small pots (1 litre) or large pots (8 litre) with 1ow nitrogen (50 mg kg-1 soil)and high nitrogen (200 mg kg-1 soil). Restricting root zone decreased dry weight of plants at the stages ofstem elongation and flowering, compared to those of control plants grown in the large pots (P<0.01). Sprayingof 6-benzylaminopurine (50 μmol L-1) increased dry weight of plants and chlorop hyll concentration in leaves.Restriction of root zone decreased the concentrations of total nitrogen, chlorophyll and soluble protein in thefiag leaf and acce1erated senescence of the leaves. Supply of high nitrogen delayed senescence of the fiag leafThe results suggested that the shortage of nutrients, especially nitrogen deficiency was the primary reasonfor the decreased growth of plant in the treatment of root zone restriction.
文摘In order to obtain the perforation depth, the three zones with different permeability because of plastic deformation and fluid invasion were studied based on related theories. The study shows that the calculation of perforation depth should take account of not only damaged zone, but also plastic zone, because the plastic zone has much lower permeability. The required minimum perforation depth was obtained by making the solution of elastic/plastic equations, and the factors affecting perforation depth were analyzed accordingly.
基金Supported by the National Key Technology Research and Development Program of China(No.2011BAD13B01)the National Natural Science Foundation of China(General Program)(No.41376165)the China Agriculture Research System CARS-47
文摘Ridgetail white prawn (Exopalaemon carinicauda) are of significant economic importance in China where they are widely cultured. However, there is little information on the basic biology of this species. We evaluated the effect of temperature (16, 19, 22, 25, 28, 31, and 34℃) on the standard metabolic rates (SMRs) of juvenile and adult E. carinicauda in the laboratory under static conditions. The oxygen consumption rate (OCR), ammonia-N excretion rate (AER), and atornic ratio of oxygen consumed to nitrogen consumed (O:N ratio) of juvenile and adult E. carinicauda were significantly influenced by temperature (P〈0.05). Both the OCR and AER of juveniles increased significantly with increasing temperature from 16 to 34℃, but the maximum OCR for adults was at 31℃. Juvenile shrimp exhibited a higher OCR than the adults from 19 to 34℃. There was no significant difference between the AERs of the two life-stages from 16 to 31 ℃ (P〉0.05). The O:N ratio in juveniles was significantly higher than that in the adults over the entire temperature range (P〈0.05). The temperature coefficient (Q_10) of OCR and AER ranged from 5.03 to 0.86 and 6,30 to 0.85 for the adults, respectively, and from 6,09-1.03 and 3.66-1.80 for the juveniles, respectively. The optimal temperature range for growth of the juvenile and adult shrimp was from 28 to 31℃, based on Q_10 and SMR values. Results from the present study may be used to guide pond culture production ofE. carinicauda.
文摘Patients with stage Ⅲ N2 non-small cell lung cancer (NSCLC) are more than one third of all NSCLC patients. The 5-year survival rate of them is approximately 15%. From therapeutic views, stage ⅢA N2 of 97 International Lung Cancer Staging System is an obvious hetero-combination, which includes mediastinal lymph node metastasis based on microscope after postoperative examination and N2 of single station or N2 of multiple stations based on computerized tomographic scanning and N2 of mediastinal lymph node mixed together. The different status of stage N2 lead to different prognosis. Andre et al reported the results of continuous surgery in 702 patients with NSCLC, which showed that N2 of single station based on microscope, 5-year survival rate was 34% (244 cases), N2 of multiple stations based on microscope, 5-year survival rate was 11% (788 cases), N2 of single station based on radiograph, 5-year survival rate was 8% (118 cases),
基金a grant from the Foundation of Science and Technology of Dalian (No. 20039907)
文摘Objective: To study the efficiency, safety and feasibility of preoperative bronchial artery infusion (BAI) chemotherapy on operation in patients with locally advanced (stage Ⅲ) non-small cell lung cancer (NSCLC). Methods: 92 cases with locally advanced NSCLC patients were randomly divided into two groups: (1) BAI chemotherapy group: 39 cases were received BAI chemotherapy for 2 courses and followed surgery; (2) surgery alone group: 51 cases were treated by operation alone. The complete resection rate and preoperative complications were compared between these two groups. Results: In BAI chemotherapy group, the rate of clinical efficiency was 68.3% with slight toxicity. In BAI chemotherapy group the surgery complete resection rate was 89.7%, which was significantly higher than that in surgery alone group (72.5%, P 〈 0.05). No significant differences of blood loss, operative complications and mortality were observed between these two groups. Conclusion: BAI neoadjuvant chemotherapy was safe and effective, which can increase the complete resection rate of the tumor and did not increase the operative complications and mortality.
基金supported by the National Natural Science Foundation of China(#31770566,#31770232)Biodiversity Survey,Observation and Assessment Program of Ministry of Ecology and Environment of China and the Fundamental Research Funds for the Central Universities of China(#SCU2021D006,#LZUJBKY202035)D.M.N.thanks Instituto Serrapilheira/Brazil(Serra-1912-32082)and Coordenação de Aperfeiçoamento de Pessoal de Nível Superior—CAPES/PrInt/Brazil(88887.474387/2020-00)for financial support during the time this research was carried out.
文摘The effects of contemporary climate,habitat heterogeneity and long-term climate change on species richness are well studied for woody plants in forest ecosystems,but poorly understood for herbaceous plants,especially in alpine–arctic ecosystems.Here,we aim to test if the previously proposed hypothesis based on the richness–environment relationship could explain the variation in richness patterns of the typical alpine–arctic herbaceous genus Saxifraga.Using a newly compiled distribution database of 437 Saxifraga species,we estimated the species richness patterns for all species,narrow-and wide-ranged species.We used generalized linear models and simultaneous autoregressive models to evaluate the effects of contemporary climate,habitat heterogeneity and historical climate on species richness patterns.Partial regressions were used to determine the independent and shared effects of different variables.Four widely used models were tested to identify their predictive power in explaining patterns of species richness.We found that temperature was negatively correlated with the richness patterns of all and wide-ranged species,and that was the most important environmental factor,indicating a strong conservatism of its ancestral temperate niche.Habitat heterogeneity and long-term climate change were the best predictors of the spatial variation of narrow-ranged species richness.Overall,the combined model containing five predictors can explain ca.40%–50%of the variation in species richness.We further argued that additional evolutionary and biogeographical processes might have also played an essential role in shaping the Saxifraga diversity patterns and should be considered in future studies.