This research directly supported the author’s thesis work in partial fulfilment of Master of Science in biology from the University of North Texas(United States)from August 1996 to September 1997.Two sites at Lake Ra...This research directly supported the author’s thesis work in partial fulfilment of Master of Science in biology from the University of North Texas(United States)from August 1996 to September 1997.Two sites at Lake Ray Roberts,Denton County,Texas(United States)were examined and contrasted for productivity.The site located in the pelagic zone exhibited a slight,thermal gradient with no stratification,and a slightly stratified clinograde oxygen profile which is typical for summer-stratified eutrophic lakes.The site located in the shallow,littoral zone exhibited high,increasing turbidity with depth,marked by shallow light attenuation through the water column.Temperature was constant at every depth in the littoral site,with a slight,clinograde oxygen profile,typical for shallow,littoral areas subject to wind-induced mixing.Volume estimations of chlorophyll-α shows a strong presence in the euphotic zone,indicating photosynthesis occurs until approximately 2.2 m below the surface.The shallow,littoral site showed the basic signs of higher productivity than the open,pelagic site.展开更多
Introduction: The number of people suffering from diabetes and hypertension (HBP) is increasing worldwide and particularly in sub-Saharan Africa, despite the fact that they are preventable. The aim of our study is to ...Introduction: The number of people suffering from diabetes and hypertension (HBP) is increasing worldwide and particularly in sub-Saharan Africa, despite the fact that they are preventable. The aim of our study is to determine the factors associated with hypertension and diabetes comorbidity in the Department of Littoral in 2023. Study Setting and Methods: Our study took place in the Department of Littoral in Benin. It was a cross-sectional general population study conducted over a three-month period from April 10 to July 10, 2023. It included subjects aged 18 and over with or without a history of hypertension and/or diabetes. The sampling method was probabilistic and the technique used was a WHO three-stage cluster survey. The dependent variable is comorbidity of hypertension and diabetes. A logistic regression model was used to identify factors associated with hypertension-diabetes comorbidity. Results: The study population was predominantly female (59.9%). The mean age was 44 ± 17. A total of 48 (8.8%) of the subjects in the study suffered from both diabetes and hypertension. Factors associated with comorbidity of hypertension and diabetes were age ≥ 50 years (OR: 5.48;95% CI: 2.69 - 12.20;p = 0.001);male sex (OR: 2.98;95% CI: 1.39 - 6.46;p = 0.005);too much salt or salty sauce consumed (OR: 6.06;95% CI: 1.56 - 22.20;p = 0.034);abdominal obesity (OR: 6.12;95% CI: 2.79 - 14.3;p = 0.001). Conclusion: Hypertension and diabetes are emerging as major public health problems in Benin. The main associated factors were age, gender, the amount of salt or salty sauce consumed and abdominal obesity. A response is urgently needed to act on the factors identified in order to avoid possible complications and an increase in prevalence.展开更多
Objective:To investigate the hypolipidaemic and antioxidant effects of aqueous leaf extract of Enicoslemma littorale(E.littorale)Blume(Ens)against ethanol induced hepatic injury in albino rats.Methods:Male albino rats...Objective:To investigate the hypolipidaemic and antioxidant effects of aqueous leaf extract of Enicoslemma littorale(E.littorale)Blume(Ens)against ethanol induced hepatic injury in albino rats.Methods:Male albino rats of six numbers in each group were undertaken for study.Hypolipidaemic and antioxidant effect of E.littorale Blume(Ens)aqueous leaf extract at a dosage of 250 mg/kg bw was evaluated.Results:Levels of serum and tissue cholesterol,triglycerides and free fatty acids were elevated and levels of tissue thiobarbituric acid reactive substances(TBARS)and lipid hydroperoxide were increased in ethanol treated rats.The activity levels of liver antioxidant enzymes such as superoxide dismutase(SOD),catalase(CAT),glutathione peroxidase(GPX)and glutathione-s-transferase(GST)were decreased.After adiminstration of extract of E,littorale Blume,levels of cholesterol,triglycerides and free fatty acids were decreased in serum and liver tissue,levels of TBARS and lipid hydroperoxide were decreased,and Ever antioxidant enzymes were increased in liver tissue;Conclusions:It can be concluded that the aqueous leaf extract of E,littorale Blume(Ens)has potent restorative effect on hyperlipidaemic and oxidative stress.展开更多
The spatial distribution and diversity of archaeal and bacterial ammonia oxidizers （AOA and AOB） were evaluated targeting amoA genes in the gradient of a littoral buffer zone which has been identified as a hot spot ...The spatial distribution and diversity of archaeal and bacterial ammonia oxidizers （AOA and AOB） were evaluated targeting amoA genes in the gradient of a littoral buffer zone which has been identified as a hot spot for N cycling. Here we found high spatial heterogeneity in the nitrification rate and abundance of ammonia oxidizers in the five sampling sites. The bacterial amoA gene was numerically dominant in most of the surface soil but decreased dramatically in deep layers. Higher nitrification potentials were detected in two sites near the land/water interface at 4.4–6.1 μg NO2-N/（g dry weight soil·hr）, while only 1.0–1.7 μg NO2-N/（g dry weight soil·hr） was measured at other sites. The potential nitrification rates were proportional to the amoA gene abundance for AOB, but with no significant correlation with AOA. The NH4＋ concentration was the most determinative parameter for the abundance of AOB and potential nitrification rates in this study. Higher richness in the surface layer was found in the analysis of biodiversity. Phylogenetic analysis revealed that most of the bacterial amoA sequences in surface soil were affiliated with the genus of Nitrosopira while the archaeal sequences were almost equally affiliated with Candidatus ‘Nitrososphaera gargensis’ and Candidatus ‘Nitrosocaldus yellowstonii’. The spatial distribution of AOA and AOB indicated that bacteria may play a more important role in nitrification in the littoral buffer zone of a N-rich lake.展开更多
Lake littoral zones are characterized by heterogeneity in the biogeochemistry of nutrient elements. This study aimed to explore the relationship between the nitrous oxide reductase gene （nosZ）-encoding denitrifier c...Lake littoral zones are characterized by heterogeneity in the biogeochemistry of nutrient elements. This study aimed to explore the relationship between the nitrous oxide reductase gene （nosZ）-encoding denitrifier community composition/abundance and N2O reduction. Five samples （deep sediment, near-transition sediment, transition site, near-transition land and land soil） were collected along a littoral gradient of eutrophic Baiyangdian Lake, North China. To investigate the relationship between the nosZ-encoding denitrifier community structure and N20 reduction, the nosZ-encoding denitrifier community composition/abundance, potential denitrification rate （DNR） and potential N20 production rate （pN20） were investigated using molecular biological technologies and laboratory incubation experiments. The results showed that the average DNR of sediments was about 25 times higher than that of land soils, reaching 282.5 nmol N/（g dry weight （dw）.hr） and that the average pN20 of sediments was about 3.5 times higher than that of land soils, reaching 15.7 nmol N/（g dw-hr）. In the land area, the nosZ gene abundance showed a negative correlation with the N20/（N20＋N2） ratio, indicating that nosZ gene abundance dominated N20 reduction both in the surface soils of the land area and in the soil core of the transition site. Phylogenetic analysis showed that all the nosZ sequences recovered from sediment clustered closely with the isolates Azospirillum largimobile and Azospirillum irakense affiliated to Rhodospirillaceae in alpha-Proteobacteria, while about 92.3% （12/13） of the nosZ sequences recovered from land soil affiliated to Rhizobiaceae and Bradyrhizobiaceae in a-Proteobacteria. The community composition of nosZ gene-encoding denitrifiers appeared to be coupled with N20 reduction along the littoral gradient.展开更多
AIM:To establish the safety and feasibility of laparoscopic splenectomy(LS) for littoral cell angioma(LCA).METHODS:From September 2003 to November 2013,27 patients were diagnosed with LCA in our institution.These pati...AIM:To establish the safety and feasibility of laparoscopic splenectomy(LS) for littoral cell angioma(LCA).METHODS:From September 2003 to November 2013,27 patients were diagnosed with LCA in our institution.These patients were divided into two groups based on operative procedure:LS(13 cases,Group 1) and open splenectomy(14 cases,Group 2).Data were collected retrospectively by chart review.Comparisons were performed between the two groups in terms of demographic characteristics(sex and age); operative outcomes(operative time,estimated blood loss,transfusion,and conversion); postoperative details(length of postoperative stay and complications); and follow-up outcome.RESULTS:LS was successfully carried out in all patients except one in Group 1,who required conversion to hand-assisted LS because of perisplenic adhesions.The average operative time for patients in Group 1 was significantly shorter than that in Group 2(127 ± 34 min vs 177 ± 25 min,P = 0.001).The average estimated blood loss in Group 1 was significantly lower than in Group 2(62 ± 48 m L vs 138 ± 64 m L,P < 0.01).No patient in Group 1 required a blood transfusion,whereas one in Group 2 required a transfusion.Two patients in Group 1 and four in Group 2 suffered from postoperative complications.All the complications were cured by conservative therapy.There were no deaths in our series.All patients were followed up and no recurrence or abdominal metastasis were found.CONCLUSION:LS for patients with LCA is safe and feasible,with preferable operative outcomes and longterm tumor-free survival.展开更多
The purpose of this study is to forecast the profitable oil and gas reservoir,which is the key of finding hydrocarbon,based on the conception of special geologic bodies.With the guiding methodology of the research thi...The purpose of this study is to forecast the profitable oil and gas reservoir,which is the key of finding hydrocarbon,based on the conception of special geologic bodies.With the guiding methodology of the research thinking of integration of point-line-surface by using the methods and techniques of logging,seismic,seismic attribute,and logging constrained inversion in 3D data volume,the special geologic bodies of Member 3 of Dongying Formation in Littoral Slope Zone of Qikou Sag,which has important hydrocarbon exploration potential,are recognized and described under the constraint of sequence stratigraphic framework.As a result,the developed scale,geometric shape and space distribution feature of the special geologic bodies are forecasted;the inner structure and sequence structure patterns of the geologic bodies are also ascertained.From the lowstand system tract (LST) and lacustrine expanding system tract (EST) to the highstand system tract (HST),the geologic bodies have evolved from relative centralization of lake basin reducing period to three relative dispersive isolated parts of broad lake basin period.According to the relevance and regularity of the development of geologic bodies,the conclusions can be obtained that three types of potential profitable reservoir traps,including the lithologic lens traps,lithologic updip pinchout traps and structural-lithologic composite traps,are forecasted.In addition,scientific basis for further hydrocarbon exploration in new area (few-well area and no-well area) is offered in the guidance of sequence stratigraphic model.展开更多
A littoral cell angioma(LCA) is a primary vascular tumor of the spleen, that can have malignant potential and may present association with other malignancies. This is a case of LCA that was discovered incidentally in ...A littoral cell angioma(LCA) is a primary vascular tumor of the spleen, that can have malignant potential and may present association with other malignancies. This is a case of LCA that was discovered incidentally in a 79-year-old woman who presented with a polycythemia at the time of consultation. The neoplasm was evaluated by ultrasound and computed tomography. The patient underwent a splenectomy that revealed LCA by pathological evaluation. The post-operative outcome was favorable with no complications or recurrent disease. This case presentation, clinical, radiographic, and pathological features of an uncommon splenic tumor can be studied in order to advance our knowledge in our understanding of LCA.展开更多
Primary splenic lesions are rare entities among which littoral cell angioma(LCA) is a recently described, uncommon vascular lesion that is unique to the spleen. It has heretofore been described primarily in pathologic...Primary splenic lesions are rare entities among which littoral cell angioma(LCA) is a recently described, uncommon vascular lesion that is unique to the spleen. It has heretofore been described primarily in pathologic series and has been found mostly to behave as a benign entity. A few reports of malignant variants have been reported. We present a case report of a solitary LCA discovered after splenectomy for an incidentally discovered splenic lesion, along with a literature review.展开更多
Objective:To study the antimicrobial activity of Enicostemma littorale(E.littorale) using different solvents.Methods:Chloroform,methanol and acetone extracts of different parts of E.littorale(leaf,stem and root) were ...Objective:To study the antimicrobial activity of Enicostemma littorale(E.littorale) using different solvents.Methods:Chloroform,methanol and acetone extracts of different parts of E.littorale(leaf,stem and root) were evaluated for antimicrobial activity using disc diffusion method against some gram-negative species such as Escherichia coli,Klebsiella pnemoniae, Pseudomonas aeruginosa,Salmonella typhi and gram-positive species Staphylococcus aureus, Bacillus cereus,Bacillus subtilis and two fugal species viz.,Aspergillus fumigates and Aspergillus flavus.Results:The chloroform extracts showed the highest antibacterial activity.Among leaf, stem and root extracts,the stem extracts showed maximum antibacterial activity.All of the used extracts had no significant antifungal activity against Aspergillus fumigates and Aspergillus flavus.The chloroform stem extract showed highest activity(about 20 mm inhibition zone) against Bacillus subtilis(at 500 tng/mL) followed by the methanolic stem extract which showed highest activity against the same organism.The lowest antibacterial activity was observed by the acetone leaf extract(about 8 mm inhibition zone) against Escherichia coli.Conclusions:The findings of the study indicate littorale could also be a new source for antibiotics discovery.展开更多
In Burton Lake (an Antarctic littoral saline lake), as one of the overwinter species, the female Drepanopus bispinosus reach adult form in autumn. and early winter.For the subsequent life period of more than eight mon...In Burton Lake (an Antarctic littoral saline lake), as one of the overwinter species, the female Drepanopus bispinosus reach adult form in autumn. and early winter.For the subsequent life period of more than eight months, the animals experience such changing environment as increasing salinities from approximately 33 (in May) to 39 (in November). There is a considerable difference of salinity tolerance of female adults between summer and winter populations.Winter collected copepods survived lower salinities than summer collected copepods in this experiment. The upward shift in their salinity tolerance range is related to the development of field acclimation to salinity. Respiration rates of the summer animals showed a visible increase over those of winter copepods in simitar salinity and temperature conditions, thus supporting the above conclusion.展开更多
Quaternary underground brine in the littoral plain region of the Bohai coast is new type littoral facies evaporation ore deposit in liquid state . This model of " littorally- forming brine " is based on stud...Quaternary underground brine in the littoral plain region of the Bohai coast is new type littoral facies evaporation ore deposit in liquid state . This model of " littorally- forming brine " is based on study of the distribution, depositional environment, forming / storing process, and genesis of underground brine in the coast of Laizhou Bay . Essential conditions for genesis of brine are arid and semiarid climate , abundant sources of ancient seawater, and geological and geomorphological environment of wide tidal beach along a coast. The process of underground brine genesis may be : seawater/tidal beach-evaporation and concentration-seeping and accumulation- brine/tidal beach - burial (evolution of the sea- land )- underground brine .Underground brine is characterized by high content of chemical elements, shallow burial depth and easy exploitation . The process of extracting salt from underground brine present in the tidal flat is incomparably superior to that of producing salt from seawater, and has展开更多
This pilot study attempts to demonstrate some underlying scanning electron microscopy themes of quartz grain surface textures. A variety of textural patterns and individual features are described for grains selected f...This pilot study attempts to demonstrate some underlying scanning electron microscopy themes of quartz grain surface textures. A variety of textural patterns and individual features are described for grains selected from various littoral environments. An attempt was made to differentiate samples on surface textures alone, but limitations of using this technique in sedimentological isolation were apparent. Statistical analysis of checklist data and photographic evidence revealed some of the more important feature combinations used in environmental diagnosis. The use of discriminant analysis provided quantitative sample separation.展开更多
Littoral zone is a special land/ landscape type. As an important kind of land resource in support, the use of littoral zone is vital to eastern coastal areas in China. And the research on littoral zone relates to the ...Littoral zone is a special land/ landscape type. As an important kind of land resource in support, the use of littoral zone is vital to eastern coastal areas in China. And the research on littoral zone relates to the key theory of landscape ecology. Based on the theory of landscape ecology, the littoral zone was divided into four types: mud flat, sand beach, bench, and biological flat. The distribution of each type in China is pointed out. As a typical open system, littoral zone has six landscape ecological characteristics: (1) high sensitivity to disturbance; (2) distinct edge effect; (3) spatial aggregation of natural resources; (4) frequently spatial oscillation; (5) obviously spatial heterogeneity; and (6) noticeably spatial differentiation. Some proposals are also put forward on the land use and development of littoral zone for environmental protection and environmental management.展开更多
In a large eutrophic lake,the littoral zone is normally an area with high-density elevated aquatic plant life,including algal blooms,where the presence of reed wetlands allows the accumulation of algae.In this study,t...In a large eutrophic lake,the littoral zone is normally an area with high-density elevated aquatic plant life,including algal blooms,where the presence of reed wetlands allows the accumulation of algae.In this study,the impact of accumulated algal blooms in reed wetlands in the littoral zone s of Chaohu Lake was investigated seasonally from 2018 to 2019.The concentrations of chlorophyll a(Chl a),total nitrogen(TN),and total phosphorus(TP)were much higher in the reed-covered littoral zones(RCLZ)than in the unvegetated littoral zones(ULZ),indicating that more algal biomass was trapped and accumulated in the RCLZ.Algal biomass could be horizontally transported to downwind littoral zones under low wind speeds,favoring the establishment of blooms.Algal accumulation levels were highest in summer due to high water temperatures and algal biomasses.Likewise,the northern littoral zones were conducive to the development of large algal blooms because of the wind pattern.The values of TN,TP,Chl a,and loss on ignition in surface sediments were higher in the RCLZ than in the ULZ.Moreover,the diffusive fluxes of ammonium and soluble reactive pho sphorus were also higher in the RCLZ than in the ULZ.Considering the capability of reed wetlands to trap algae,mechanical salvage and other physical methods should be adopted to eliminate algal biomass when massive blooms accumulate in the RCLZ.展开更多
The mechanism for development of littoral karst differs from that of inland karst, and the mixture corrosion effects are one of the most important factors that control the development of littoral karst. Through seven ...The mechanism for development of littoral karst differs from that of inland karst, and the mixture corrosion effects are one of the most important factors that control the development of littoral karst. Through seven groups of static experiments carried out in a closed CO2-H2O system, basic conclusions can be drawn as follows: (1) the basic law of corrosion process in a transitional zone of seawater-freshwater in littoral karst areas is identical with that in the fresh water, i.e., the lithologic characteristics and rock structure are the main factors which control the development of littoral karst; (2) the mixture corrosion rate of the carbonate rock in the above transitional zone is faster than that in fresh water or seawater; (3) the mechanism for development of carbonate rocks differs at various pressures of CO2 in a transitional zone in littoral karst areas.展开更多
Traditional medicine system of India comprised varieties of plants which are playing a significant role in curing diseases from ancient times.Among them,Enicostemma littorale blume(E.littorale)a perennial herb of the ...Traditional medicine system of India comprised varieties of plants which are playing a significant role in curing diseases from ancient times.Among them,Enicostemma littorale blume(E.littorale)a perennial herb of the family Gentianaceae is cosmopolitan in occurrence in India.The bittery natured plant acts as a laxative,helps in curing fever,rheumatism,skin diseases,abdominal disorders,snake bite,obesity and helps to regulate blood sugar levels.The plant constituents have been reported for possessing antimicrobial,antioxidant,antiulcer,antiinflammatory,hypolipidaemic,hepatoprotective and hypoglycemic properties.This review provides a bird's eye view about geographical distribution,physicochemical parameters,phvtoconstituents and pharmacological properties of E.littorale.展开更多
The key of finding hydrocarbon reservoir is to find the profitable oil and gas reservoir.This paper uses the conception of"special geologic bodies"to study the profitable reservoir.Constrained by the sequenc...The key of finding hydrocarbon reservoir is to find the profitable oil and gas reservoir.This paper uses the conception of"special geologic bodies"to study the profitable reservoir.Constrained by the sequence stratigraphy framework,this paper recognizes and describes the special geologic bodies of the Member 3 of Dongying Formation in Littoral Slope Zone of Qikou Sag,which have important展开更多
BACKGROUND Littoral cell angioma(LCA)is a rare benign vascular tumor of the spleen.Given its rarity,standard diagnostic and therapeutic recommendations have yet to be developed for reported cases.Splenectomy is the on...BACKGROUND Littoral cell angioma(LCA)is a rare benign vascular tumor of the spleen.Given its rarity,standard diagnostic and therapeutic recommendations have yet to be developed for reported cases.Splenectomy is the only method of obtaining a pathological diagnosis and providing treatment to obtain a favorable prognosis.CASE SUMMARY A 33-year-old female presented with abdominal pain for one month.Computed tomography and ultrasound revealed splenomegaly with multiple lesions and two accessory spleens.The patient underwent laparoscopic total splenectomy and accessory splenectomy,and splenic LCA was confirmed by pathology.Four months after surgery,the patient presented with acute liver failure,was readmitted,rapidly progressed to multiple organ dysfunction syndrome and died.CONCLUSION Preoperative diagnosis of LCA is challenging.We systematically reviewed online databases to identify the relevant literature and found a close relationship between malignancy and immunodysregulation.When a patient suffers from both splenic tumors and malignancy or immune-related disease,LCA is possible.Due to potential malignancy,total splenectomy(including accessory spleen)and regular follow-up after surgery are recommended.If LCA is diagnosed after surgery,a comprehensive postoperative examination is needed.展开更多
Littoral cell angiomas(LCA) of the spleen are vascular tumors of unknown etiology arising from the littoral cells of the splenic red pulp sinuses. Usually a benign and incidental finding,LCA have been repeatedly repor...Littoral cell angiomas(LCA) of the spleen are vascular tumors of unknown etiology arising from the littoral cells of the splenic red pulp sinuses. Usually a benign and incidental finding,LCA have been repeatedly reported in association with a variety of visceral malignancies and hold the potential for dissemination per se. We encountered a case of a 30 year old female who was diagnosed with solid pseudopapillary tumor of the head and distal pancreas by fine needle aspiration cytology. A distal pancreatectomy with splenectomy was performed in addition to a pylorus-preserving Whipple's procedure and cholecystectomy. Histopathological examination confirmed solid pseudopapillary tumor of the pancreasand showed multiple well-circumscribed anastomosing vascular channels in the spleen. The diagnosis of LCA of the spleen was confirmed by immunohistochemistry that revealed co-expression of endothelial cell marker,CD31 and CD34,along with histiocytic marker,CD68 by the vascular lining cells. LCA has been previously reported in association with colorectal and pancreatic adenocarcinoma,malignant lymphoma,myelodysplasia and autoimmune disorders. We report the first case of LCA associated with solid pseudopapillary tumor of the pancreas.展开更多
文摘This research directly supported the author’s thesis work in partial fulfilment of Master of Science in biology from the University of North Texas(United States)from August 1996 to September 1997.Two sites at Lake Ray Roberts,Denton County,Texas(United States)were examined and contrasted for productivity.The site located in the pelagic zone exhibited a slight,thermal gradient with no stratification,and a slightly stratified clinograde oxygen profile which is typical for summer-stratified eutrophic lakes.The site located in the shallow,littoral zone exhibited high,increasing turbidity with depth,marked by shallow light attenuation through the water column.Temperature was constant at every depth in the littoral site,with a slight,clinograde oxygen profile,typical for shallow,littoral areas subject to wind-induced mixing.Volume estimations of chlorophyll-α shows a strong presence in the euphotic zone,indicating photosynthesis occurs until approximately 2.2 m below the surface.The shallow,littoral site showed the basic signs of higher productivity than the open,pelagic site.
文摘Introduction: The number of people suffering from diabetes and hypertension (HBP) is increasing worldwide and particularly in sub-Saharan Africa, despite the fact that they are preventable. The aim of our study is to determine the factors associated with hypertension and diabetes comorbidity in the Department of Littoral in 2023. Study Setting and Methods: Our study took place in the Department of Littoral in Benin. It was a cross-sectional general population study conducted over a three-month period from April 10 to July 10, 2023. It included subjects aged 18 and over with or without a history of hypertension and/or diabetes. The sampling method was probabilistic and the technique used was a WHO three-stage cluster survey. The dependent variable is comorbidity of hypertension and diabetes. A logistic regression model was used to identify factors associated with hypertension-diabetes comorbidity. Results: The study population was predominantly female (59.9%). The mean age was 44 ± 17. A total of 48 (8.8%) of the subjects in the study suffered from both diabetes and hypertension. Factors associated with comorbidity of hypertension and diabetes were age ≥ 50 years (OR: 5.48;95% CI: 2.69 - 12.20;p = 0.001);male sex (OR: 2.98;95% CI: 1.39 - 6.46;p = 0.005);too much salt or salty sauce consumed (OR: 6.06;95% CI: 1.56 - 22.20;p = 0.034);abdominal obesity (OR: 6.12;95% CI: 2.79 - 14.3;p = 0.001). Conclusion: Hypertension and diabetes are emerging as major public health problems in Benin. The main associated factors were age, gender, the amount of salt or salty sauce consumed and abdominal obesity. A response is urgently needed to act on the factors identified in order to avoid possible complications and an increase in prevalence.
文摘Objective:To investigate the hypolipidaemic and antioxidant effects of aqueous leaf extract of Enicoslemma littorale(E.littorale)Blume(Ens)against ethanol induced hepatic injury in albino rats.Methods:Male albino rats of six numbers in each group were undertaken for study.Hypolipidaemic and antioxidant effect of E.littorale Blume(Ens)aqueous leaf extract at a dosage of 250 mg/kg bw was evaluated.Results:Levels of serum and tissue cholesterol,triglycerides and free fatty acids were elevated and levels of tissue thiobarbituric acid reactive substances(TBARS)and lipid hydroperoxide were increased in ethanol treated rats.The activity levels of liver antioxidant enzymes such as superoxide dismutase(SOD),catalase(CAT),glutathione peroxidase(GPX)and glutathione-s-transferase(GST)were decreased.After adiminstration of extract of E,littorale Blume,levels of cholesterol,triglycerides and free fatty acids were decreased in serum and liver tissue,levels of TBARS and lipid hydroperoxide were decreased,and Ever antioxidant enzymes were increased in liver tissue;Conclusions:It can be concluded that the aqueous leaf extract of E,littorale Blume(Ens)has potent restorative effect on hyperlipidaemic and oxidative stress.
基金supported by the National Natural Science Foundation of China (No. 20877086 21077119)+5 种基金the National Basic Research Program (973) of China (No. 2009CB421103)the National Water Project of China (No. 2009ZX07209-005 2008ZX07421-001 2008ZX07209-006-02)the support of Beijing Nova Program (No. 2011104)K. C. Wong Education Foundation, Hong Kong
文摘The spatial distribution and diversity of archaeal and bacterial ammonia oxidizers （AOA and AOB） were evaluated targeting amoA genes in the gradient of a littoral buffer zone which has been identified as a hot spot for N cycling. Here we found high spatial heterogeneity in the nitrification rate and abundance of ammonia oxidizers in the five sampling sites. The bacterial amoA gene was numerically dominant in most of the surface soil but decreased dramatically in deep layers. Higher nitrification potentials were detected in two sites near the land/water interface at 4.4–6.1 μg NO2-N/（g dry weight soil·hr）, while only 1.0–1.7 μg NO2-N/（g dry weight soil·hr） was measured at other sites. The potential nitrification rates were proportional to the amoA gene abundance for AOB, but with no significant correlation with AOA. The NH4＋ concentration was the most determinative parameter for the abundance of AOB and potential nitrification rates in this study. Higher richness in the surface layer was found in the analysis of biodiversity. Phylogenetic analysis revealed that most of the bacterial amoA sequences in surface soil were affiliated with the genus of Nitrosopira while the archaeal sequences were almost equally affiliated with Candidatus ‘Nitrososphaera gargensis’ and Candidatus ‘Nitrosocaldus yellowstonii’. The spatial distribution of AOA and AOB indicated that bacteria may play a more important role in nitrification in the littoral buffer zone of a N-rich lake.
基金supported by the National Natural Science Foundation of China (No.21077119)the National Basic Research Program of China(No. 2009CB421103)+3 种基金the Key Project of Water Pollution Control and Management of China (No.2008ZX07209-006, 2009ZX07209-005 and 2008ZX07421-001)the Special Fund of Tianjin Science and Technology Innovation Project (No. 08FDZDSF03200)the support of the Beijing Nova Program (No. 2011095)the K. C. Wong Education Foundation, Hong Kong, China
文摘Lake littoral zones are characterized by heterogeneity in the biogeochemistry of nutrient elements. This study aimed to explore the relationship between the nitrous oxide reductase gene （nosZ）-encoding denitrifier community composition/abundance and N2O reduction. Five samples （deep sediment, near-transition sediment, transition site, near-transition land and land soil） were collected along a littoral gradient of eutrophic Baiyangdian Lake, North China. To investigate the relationship between the nosZ-encoding denitrifier community structure and N20 reduction, the nosZ-encoding denitrifier community composition/abundance, potential denitrification rate （DNR） and potential N20 production rate （pN20） were investigated using molecular biological technologies and laboratory incubation experiments. The results showed that the average DNR of sediments was about 25 times higher than that of land soils, reaching 282.5 nmol N/（g dry weight （dw）.hr） and that the average pN20 of sediments was about 3.5 times higher than that of land soils, reaching 15.7 nmol N/（g dw-hr）. In the land area, the nosZ gene abundance showed a negative correlation with the N20/（N20＋N2） ratio, indicating that nosZ gene abundance dominated N20 reduction both in the surface soils of the land area and in the soil core of the transition site. Phylogenetic analysis showed that all the nosZ sequences recovered from sediment clustered closely with the isolates Azospirillum largimobile and Azospirillum irakense affiliated to Rhodospirillaceae in alpha-Proteobacteria, while about 92.3% （12/13） of the nosZ sequences recovered from land soil affiliated to Rhizobiaceae and Bradyrhizobiaceae in a-Proteobacteria. The community composition of nosZ gene-encoding denitrifiers appeared to be coupled with N20 reduction along the littoral gradient.
文摘AIM:To establish the safety and feasibility of laparoscopic splenectomy(LS) for littoral cell angioma(LCA).METHODS:From September 2003 to November 2013,27 patients were diagnosed with LCA in our institution.These patients were divided into two groups based on operative procedure:LS(13 cases,Group 1) and open splenectomy(14 cases,Group 2).Data were collected retrospectively by chart review.Comparisons were performed between the two groups in terms of demographic characteristics(sex and age); operative outcomes(operative time,estimated blood loss,transfusion,and conversion); postoperative details(length of postoperative stay and complications); and follow-up outcome.RESULTS:LS was successfully carried out in all patients except one in Group 1,who required conversion to hand-assisted LS because of perisplenic adhesions.The average operative time for patients in Group 1 was significantly shorter than that in Group 2(127 ± 34 min vs 177 ± 25 min,P = 0.001).The average estimated blood loss in Group 1 was significantly lower than in Group 2(62 ± 48 m L vs 138 ± 64 m L,P < 0.01).No patient in Group 1 required a blood transfusion,whereas one in Group 2 required a transfusion.Two patients in Group 1 and four in Group 2 suffered from postoperative complications.All the complications were cured by conservative therapy.There were no deaths in our series.All patients were followed up and no recurrence or abdominal metastasis were found.CONCLUSION:LS for patients with LCA is safe and feasible,with preferable operative outcomes and longterm tumor-free survival.
基金Project(40872077) supported by the National Natural Science Foundation of ChinaProject(2008CDA098) supported by the Key Natural Science Foundation of Hubei Province,China+1 种基金Project(TPR-2010-01) supported by the Open Project Foundation of Key Laboratory of Tectonics and Petroleum Resources,Ministry of Education,Chinasupported by the research institute exploration and development,PetroChina Dagang Oilfield Company
文摘The purpose of this study is to forecast the profitable oil and gas reservoir,which is the key of finding hydrocarbon,based on the conception of special geologic bodies.With the guiding methodology of the research thinking of integration of point-line-surface by using the methods and techniques of logging,seismic,seismic attribute,and logging constrained inversion in 3D data volume,the special geologic bodies of Member 3 of Dongying Formation in Littoral Slope Zone of Qikou Sag,which has important hydrocarbon exploration potential,are recognized and described under the constraint of sequence stratigraphic framework.As a result,the developed scale,geometric shape and space distribution feature of the special geologic bodies are forecasted;the inner structure and sequence structure patterns of the geologic bodies are also ascertained.From the lowstand system tract (LST) and lacustrine expanding system tract (EST) to the highstand system tract (HST),the geologic bodies have evolved from relative centralization of lake basin reducing period to three relative dispersive isolated parts of broad lake basin period.According to the relevance and regularity of the development of geologic bodies,the conclusions can be obtained that three types of potential profitable reservoir traps,including the lithologic lens traps,lithologic updip pinchout traps and structural-lithologic composite traps,are forecasted.In addition,scientific basis for further hydrocarbon exploration in new area (few-well area and no-well area) is offered in the guidance of sequence stratigraphic model.
文摘A littoral cell angioma(LCA) is a primary vascular tumor of the spleen, that can have malignant potential and may present association with other malignancies. This is a case of LCA that was discovered incidentally in a 79-year-old woman who presented with a polycythemia at the time of consultation. The neoplasm was evaluated by ultrasound and computed tomography. The patient underwent a splenectomy that revealed LCA by pathological evaluation. The post-operative outcome was favorable with no complications or recurrent disease. This case presentation, clinical, radiographic, and pathological features of an uncommon splenic tumor can be studied in order to advance our knowledge in our understanding of LCA.
文摘Primary splenic lesions are rare entities among which littoral cell angioma(LCA) is a recently described, uncommon vascular lesion that is unique to the spleen. It has heretofore been described primarily in pathologic series and has been found mostly to behave as a benign entity. A few reports of malignant variants have been reported. We present a case report of a solitary LCA discovered after splenectomy for an incidentally discovered splenic lesion, along with a literature review.
基金finacially supported by Department of Science and Technologypart of project work under "Innovation in Scientific Pursuit for Inspired Research programme"(INSPIRE)Department of Science and Technology(DST),Government of India,New Delhi awarded to the first author
文摘Objective:To study the antimicrobial activity of Enicostemma littorale(E.littorale) using different solvents.Methods:Chloroform,methanol and acetone extracts of different parts of E.littorale(leaf,stem and root) were evaluated for antimicrobial activity using disc diffusion method against some gram-negative species such as Escherichia coli,Klebsiella pnemoniae, Pseudomonas aeruginosa,Salmonella typhi and gram-positive species Staphylococcus aureus, Bacillus cereus,Bacillus subtilis and two fugal species viz.,Aspergillus fumigates and Aspergillus flavus.Results:The chloroform extracts showed the highest antibacterial activity.Among leaf, stem and root extracts,the stem extracts showed maximum antibacterial activity.All of the used extracts had no significant antifungal activity against Aspergillus fumigates and Aspergillus flavus.The chloroform stem extract showed highest activity(about 20 mm inhibition zone) against Bacillus subtilis(at 500 tng/mL) followed by the methanolic stem extract which showed highest activity against the same organism.The lowest antibacterial activity was observed by the acetone leaf extract(about 8 mm inhibition zone) against Escherichia coli.Conclusions:The findings of the study indicate littorale could also be a new source for antibiotics discovery.
文摘In Burton Lake (an Antarctic littoral saline lake), as one of the overwinter species, the female Drepanopus bispinosus reach adult form in autumn. and early winter.For the subsequent life period of more than eight months, the animals experience such changing environment as increasing salinities from approximately 33 (in May) to 39 (in November). There is a considerable difference of salinity tolerance of female adults between summer and winter populations.Winter collected copepods survived lower salinities than summer collected copepods in this experiment. The upward shift in their salinity tolerance range is related to the development of field acclimation to salinity. Respiration rates of the summer animals showed a visible increase over those of winter copepods in simitar salinity and temperature conditions, thus supporting the above conclusion.
基金Project Supported by the National Natural Science Foundation of China
文摘Quaternary underground brine in the littoral plain region of the Bohai coast is new type littoral facies evaporation ore deposit in liquid state . This model of " littorally- forming brine " is based on study of the distribution, depositional environment, forming / storing process, and genesis of underground brine in the coast of Laizhou Bay . Essential conditions for genesis of brine are arid and semiarid climate , abundant sources of ancient seawater, and geological and geomorphological environment of wide tidal beach along a coast. The process of underground brine genesis may be : seawater/tidal beach-evaporation and concentration-seeping and accumulation- brine/tidal beach - burial (evolution of the sea- land )- underground brine .Underground brine is characterized by high content of chemical elements, shallow burial depth and easy exploitation . The process of extracting salt from underground brine present in the tidal flat is incomparably superior to that of producing salt from seawater, and has
文摘This pilot study attempts to demonstrate some underlying scanning electron microscopy themes of quartz grain surface textures. A variety of textural patterns and individual features are described for grains selected from various littoral environments. An attempt was made to differentiate samples on surface textures alone, but limitations of using this technique in sedimentological isolation were apparent. Statistical analysis of checklist data and photographic evidence revealed some of the more important feature combinations used in environmental diagnosis. The use of discriminant analysis provided quantitative sample separation.
文摘Littoral zone is a special land/ landscape type. As an important kind of land resource in support, the use of littoral zone is vital to eastern coastal areas in China. And the research on littoral zone relates to the key theory of landscape ecology. Based on the theory of landscape ecology, the littoral zone was divided into four types: mud flat, sand beach, bench, and biological flat. The distribution of each type in China is pointed out. As a typical open system, littoral zone has six landscape ecological characteristics: (1) high sensitivity to disturbance; (2) distinct edge effect; (3) spatial aggregation of natural resources; (4) frequently spatial oscillation; (5) obviously spatial heterogeneity; and (6) noticeably spatial differentiation. Some proposals are also put forward on the land use and development of littoral zone for environmental protection and environmental management.
基金Supported by the National Natural Science Foundation of China(Nos.41877544,32071573,42177227)。
文摘In a large eutrophic lake,the littoral zone is normally an area with high-density elevated aquatic plant life,including algal blooms,where the presence of reed wetlands allows the accumulation of algae.In this study,the impact of accumulated algal blooms in reed wetlands in the littoral zone s of Chaohu Lake was investigated seasonally from 2018 to 2019.The concentrations of chlorophyll a(Chl a),total nitrogen(TN),and total phosphorus(TP)were much higher in the reed-covered littoral zones(RCLZ)than in the unvegetated littoral zones(ULZ),indicating that more algal biomass was trapped and accumulated in the RCLZ.Algal biomass could be horizontally transported to downwind littoral zones under low wind speeds,favoring the establishment of blooms.Algal accumulation levels were highest in summer due to high water temperatures and algal biomasses.Likewise,the northern littoral zones were conducive to the development of large algal blooms because of the wind pattern.The values of TN,TP,Chl a,and loss on ignition in surface sediments were higher in the RCLZ than in the ULZ.Moreover,the diffusive fluxes of ammonium and soluble reactive pho sphorus were also higher in the RCLZ than in the ULZ.Considering the capability of reed wetlands to trap algae,mechanical salvage and other physical methods should be adopted to eliminate algal biomass when massive blooms accumulate in the RCLZ.
基金supported by the National Natural Science Foundation of China(grant 49832005)IGCP443 Magnesite and Talc Geological and Environmental Correlations.
文摘The mechanism for development of littoral karst differs from that of inland karst, and the mixture corrosion effects are one of the most important factors that control the development of littoral karst. Through seven groups of static experiments carried out in a closed CO2-H2O system, basic conclusions can be drawn as follows: (1) the basic law of corrosion process in a transitional zone of seawater-freshwater in littoral karst areas is identical with that in the fresh water, i.e., the lithologic characteristics and rock structure are the main factors which control the development of littoral karst; (2) the mixture corrosion rate of the carbonate rock in the above transitional zone is faster than that in fresh water or seawater; (3) the mechanism for development of carbonate rocks differs at various pressures of CO2 in a transitional zone in littoral karst areas.
文摘Traditional medicine system of India comprised varieties of plants which are playing a significant role in curing diseases from ancient times.Among them,Enicostemma littorale blume(E.littorale)a perennial herb of the family Gentianaceae is cosmopolitan in occurrence in India.The bittery natured plant acts as a laxative,helps in curing fever,rheumatism,skin diseases,abdominal disorders,snake bite,obesity and helps to regulate blood sugar levels.The plant constituents have been reported for possessing antimicrobial,antioxidant,antiulcer,antiinflammatory,hypolipidaemic,hepatoprotective and hypoglycemic properties.This review provides a bird's eye view about geographical distribution,physicochemical parameters,phvtoconstituents and pharmacological properties of E.littorale.
文摘The key of finding hydrocarbon reservoir is to find the profitable oil and gas reservoir.This paper uses the conception of"special geologic bodies"to study the profitable reservoir.Constrained by the sequence stratigraphy framework,this paper recognizes and describes the special geologic bodies of the Member 3 of Dongying Formation in Littoral Slope Zone of Qikou Sag,which have important
基金Supported by the National Natural Science Foundation of China,No.81972230Hubei Technological Innovation Special Fund(CN),No.CXPJJH11800004-004,No.CXPJJH122002-063,and No.CXPJJH122002-092+6 种基金University Nursing Program for Young Scholar with Creative Talents in Heilongjiang Province,No.UNPYSCT-2017064Postdoctoral Foundation of Hei Long Jiang Province,No.LBH-Z20196 and No.LBH-Z20178China Postdoctoral Science Foundation,No.2021MD703835Wu Jie-Ping Medical Foundation,No.320.6750.2021-23-22Open Fund of Key Laboratory of Hepatosplenic Surgery,Ministery of Education,Harbin,China,No.GPKF202204Excellent Youth Science Fund of the First Hopital of Harbin Medical University,No.2021Y01Scientifc Foundation of the First Afliated Hospital of Harbin Medical University,No.2021B03。
文摘BACKGROUND Littoral cell angioma(LCA)is a rare benign vascular tumor of the spleen.Given its rarity,standard diagnostic and therapeutic recommendations have yet to be developed for reported cases.Splenectomy is the only method of obtaining a pathological diagnosis and providing treatment to obtain a favorable prognosis.CASE SUMMARY A 33-year-old female presented with abdominal pain for one month.Computed tomography and ultrasound revealed splenomegaly with multiple lesions and two accessory spleens.The patient underwent laparoscopic total splenectomy and accessory splenectomy,and splenic LCA was confirmed by pathology.Four months after surgery,the patient presented with acute liver failure,was readmitted,rapidly progressed to multiple organ dysfunction syndrome and died.CONCLUSION Preoperative diagnosis of LCA is challenging.We systematically reviewed online databases to identify the relevant literature and found a close relationship between malignancy and immunodysregulation.When a patient suffers from both splenic tumors and malignancy or immune-related disease,LCA is possible.Due to potential malignancy,total splenectomy(including accessory spleen)and regular follow-up after surgery are recommended.If LCA is diagnosed after surgery,a comprehensive postoperative examination is needed.
文摘Littoral cell angiomas(LCA) of the spleen are vascular tumors of unknown etiology arising from the littoral cells of the splenic red pulp sinuses. Usually a benign and incidental finding,LCA have been repeatedly reported in association with a variety of visceral malignancies and hold the potential for dissemination per se. We encountered a case of a 30 year old female who was diagnosed with solid pseudopapillary tumor of the head and distal pancreas by fine needle aspiration cytology. A distal pancreatectomy with splenectomy was performed in addition to a pylorus-preserving Whipple's procedure and cholecystectomy. Histopathological examination confirmed solid pseudopapillary tumor of the pancreasand showed multiple well-circumscribed anastomosing vascular channels in the spleen. The diagnosis of LCA of the spleen was confirmed by immunohistochemistry that revealed co-expression of endothelial cell marker,CD31 and CD34,along with histiocytic marker,CD68 by the vascular lining cells. LCA has been previously reported in association with colorectal and pancreatic adenocarcinoma,malignant lymphoma,myelodysplasia and autoimmune disorders. We report the first case of LCA associated with solid pseudopapillary tumor of the pancreas.
