Chansitheca (Sphenopteris) wudaensis sp. nov. is described based on the materials collected from the Lower Permian Shansi Formation of Wuda, Nei Mongol, China. The frond is small and at least two times pinnate. The pi...Chansitheca (Sphenopteris) wudaensis sp. nov. is described based on the materials collected from the Lower Permian Shansi Formation of Wuda, Nei Mongol, China. The frond is small and at least two times pinnate. The pinnule is sphenopteroid. The sori are borne on the abaxial surface of the pinnule, arranged in two rows parallel to the midvein, elliptic,and composed of 4-10 round sporangia. The indusium is absent. The annulus is transverse and complete, and consists of about 18 thickened cells. The features of the fertile parts, sori, sporangia and annulus and the absence of indusium indicate that the new species belongs to the Gleicheniaceae.展开更多
42 middle-aged and old people at the age between 55-70 years were selected and given the warm needling at Zusanli (ST 36), and their IL-2 and NO contents of peripheral blood before and after acupuncture were determine...42 middle-aged and old people at the age between 55-70 years were selected and given the warm needling at Zusanli (ST 36), and their IL-2 and NO contents of peripheral blood before and after acupuncture were determined. The results showed that IL-2 and NO contents increased significantly after the warm needling (P<0.01).展开更多
Insulin-like growth factor-binding protein 1 (IGFBP-1), a hypoxia-induced protein, is a member of the IGFBP family that regulates vertebrate growth and development. In this study, full-length IGFBP-la cDNA was clone...Insulin-like growth factor-binding protein 1 (IGFBP-1), a hypoxia-induced protein, is a member of the IGFBP family that regulates vertebrate growth and development. In this study, full-length IGFBP-la cDNA was cloned from a hypoxia-sensitive Cyprinidae fish species, the blunt snout bream (Megalobrama arnblycephala). IGFBP-la was expressed in various organs of adult blunt snout bream, including strongly in the liver and weakly in the gonads. Under hypoxia, IGFBP-la mRNA levels increased sharply in the skin, liver, kidney, spleen, intestine and heart tissues of juvenile blunt snout bream, but recovered to normal levels after 24-hour exposure to normal dissolved oxygen. In blunt snout bream embryos, IGFBP-la mRNA was expressed at very low levels at both four and eight hours post-fertilization, and strongly at later stages. Embryonic growth and development rates decreased significantly in embryos injected with IGFBP-la mRNA. The average body length of IGFBP-la-overexpressed embryos was 82.4% of that of the control group, and somite numbers decreased to 85.2%. These findings suggest that hypoxia-induced IGFBP-la may inhibit growth in this species under hypoxic conditions.展开更多
The aim of this work was to develop an alginate-casein composite microsphere as a bioaetive vehicle for oral administration of nutrients by a simple extrusion dripping method. Riboflavin was selected as a model drug, ...The aim of this work was to develop an alginate-casein composite microsphere as a bioaetive vehicle for oral administration of nutrients by a simple extrusion dripping method. Riboflavin was selected as a model drug, and the microencapsulation efficiency was raised to 97.94% after optimizing the preparation conditions by response surface methodology. In vitro release studies showed that riboflavin was released completely from alginate-casein microspheres in simulated intestinal fluids. Meanwhile, the morphology, structure and interaction between alginate and casein were characterized by scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) spectra.展开更多
Flavorful meat and great economic importance, crabs and swimming crabs are appreciated throughout the Brazilian coast, where its waste is discarded by fishermen and consumers. In order to verify the centesimal composi...Flavorful meat and great economic importance, crabs and swimming crabs are appreciated throughout the Brazilian coast, where its waste is discarded by fishermen and consumers. In order to verify the centesimal composition, these animals caught in Sepetiba Bay (Rio de Janeiro, Brazil), 20 samples of Ucides cordatus, Cardisoma guanhumi, Menippe nodifrons, Callinectes danae and C. exaperatus had their edible and waste parts (shells and hepatopancreas) analyzed in the Laboratory of Bromatology of the UFRRJ. The analysis revealed that the meat of crustaceans is protein (12.68% to 25.56%) and low in fat (0.37% to 0.67%), sticking to a more demanding consumer market for thin products; the waste has already presented a protein content ranging from 15.75% to 27.64% and fat from 0.75% to 3.27%, with values of calcium (17.96% to 25.23%) and phosphorus (0.93% to 1.55%), setting a precedent for use in animal feed through future studies in area.展开更多
To observe effect of moxibustion at Zusanli (足三里 ST 36) and Liangmen (梁门 ST 21 ) on expression of heat shock protein 70 (HSP70) in gastric mucosa of the rat of stress ulcer (SU) to explore the mechanism o...To observe effect of moxibustion at Zusanli (足三里 ST 36) and Liangmen (梁门 ST 21 ) on expression of heat shock protein 70 (HSP70) in gastric mucosa of the rat of stress ulcer (SU) to explore the mechanism of moxibustion in resisting oxidative injury of the gastric mucosa. Methods: Sixty SD rats were evenly randomized into 4 groups, a blank group, a model group, an acupoint moxibustion group and a non-acupoint moxibustion group. Water restraint stress (WRS) method was used to make stress gastric ulcer rat model. The ulcerative index (Ul) of gastric mucosa was evaluated by using GUTH method, the gastric mu- cosa blood flux (GMBF) was detected by a laser Doppler bloodflow monitor, and HSP70 expression and malondialdehyde (MDA) content in the gastric mucosa were determined respectively with immunohistochemical and thiobarbiturate methods. Results: Moxibustion at Zusanli (ST 36) and Liangmen (ST 21 ) significantly de- creased Ul, up-regulated HSP70 expression, increased GMBF, and decreased MDA content in the gastric mucosa in the rat of stress gastric ulcer, with significant differences as compared with the model group and the non-acupoint moxibustion group (P 〈 0.05 or P 〈 0.01 ). Conclusion: Moxibustion at Zusanli (ST 36) and Liangmen (ST 21 ) can induce high expression of HSP70 and decrease MDA content in the gastric mucosa, so as to resist oxidative injury, with relative acupoint specificity.展开更多
The silk sericin is the main residue in silk production and it is found to be a low cost and efficient bio-sorbent. In this study, sericin was characterized with various techniques including SEM (scanning electron mi...The silk sericin is the main residue in silk production and it is found to be a low cost and efficient bio-sorbent. In this study, sericin was characterized with various techniques including SEM (scanning electron micro- scope), XRD, N2 physisorption, FTIR (Fourier transformed infrared spectroscopy) and XPS (X-ray photoelectron spectroscopy). The nitrogen content of sericin was ca. 8.5 mmol.g-1 according to elemental analysis. Dye adsorption by sericin biosorbent was investigated with the acid yellow (AY), methylene blue (MB) and copper (II) phthalocyanine-3,4'4"4'"-tetrasulfonic acid (CuPc) dyes from water. Sericin displayed large capacity for AY andCuPc adsorption with adsorption capacities of respectively 3.1 and 0.35 mmol.g-1, but it did not adsorbed methyl- ene blue dye. This selectivity is due to the basicity of amide groups in seriein biosorbents.展开更多
AIM: To examine the effectiveness of human placental inhibitors, by injecting vitamin E to rats with transplanted Morris-5123 hepatoma, on the expression of cathepsins B and L in tumor, liver, lung and blood sera afte...AIM: To examine the effectiveness of human placental inhibitors, by injecting vitamin E to rats with transplanted Morris-5123 hepatoma, on the expression of cathepsins B and L in tumor, liver, lung and blood sera after transplantation of Morris 5123 hepatoma. METHODS: Animals were divided into 10 groups receiving three different concentrations of vitamin E and inhibitors along or in combination and compared with negative control (healthy rats) and positive control (tumor rats). Effectiveness of treatment was evaluated with regard to survival time, tumor response and determination of the activities of proteolytic enzymes and their inhibitors using flurogenic substrates. RESULTS: Cathepsins B and L activities were elevated by 16-fold in comparison with negative control tissues, and their endogenous inhibitor activity decreased by 1.2-fold before treatment. In several cases, tumors completely disappeared following vitamin E plus human placental cyteine protease inhibitor (CPI) compared with controls. The number of complete tumor responses was higher when 20 m/kg vitamin E plus 400 μg of CPI was used, i.e. 7/10 rats survived more than two mo. Cathepsins B and L were expressed significantly in tumor, liver, lung tissues and sera in parallel to the increasing of the endogenous inhibitor activity compared with the controls after treatment(P<0.0001) CONCLUSION: The data indicate formation of metastasis significantly reduced in treated rats, which might provide a therapeutic basis for anti-cancer therapy.展开更多
Ulysses, the towering mythological figure and the hero of the world's most famous epic The Odyssey, put on the pretence of madness to shirk the Trojan War. This is not mentioned in Homer, but in Fabulae by Gaius Juli...Ulysses, the towering mythological figure and the hero of the world's most famous epic The Odyssey, put on the pretence of madness to shirk the Trojan War. This is not mentioned in Homer, but in Fabulae by Gaius Julius Hyginus. Similarly, Hamlet put on an "antic disposition" after the ghost exhorted him to kill King Claudius. In these two cases taken from mythology and literature, and pertaining to the Classical period and the Elizabethan age respectively, intelligent characters put on the pretence of madness, in their battle with society though they are in control of their senses. It is the aim of this paper to examine the dynamics of reason and non-reason when combined and brought so close to one another, that they could be easily confounded, in light of Derrida's reading of Descartes' formulations about reason. Since the two examined works pertain to the Classical and Elizabethan ages respectively, the paper will shed light on the historical background of madness in these periods to give a broader perspective of reason and madness in these works.展开更多
A total of 280-day-old broilers (Ross 308) were randomly assigned to seven groups each containing for replicates with 10 chicks. The control group received the corn soybean meal based diet. In the treatment groups t...A total of 280-day-old broilers (Ross 308) were randomly assigned to seven groups each containing for replicates with 10 chicks. The control group received the corn soybean meal based diet. In the treatment groups the basal diet was supplemented with one of following 0.2%, 0.4% and 0.6% Thyme and Mint extracts. Triglyceride was significantly decreased by addition of 0.2% and 0.4% of Thyme extract (TE). The TE supplemented diets contained significantly lower cholesterol concentration and low density lipoprotein compared to the control diet. High density lipoprotein content was not significantly affected by dietary treatments. Likewise, differences among groups were not significant for hematocrit and hemoglobin level. The addition of Mint extract (ME) to the broiler diet led to a significant reduction in the triglyceride, cholesterol concentration and LDL. Differences among groups were not significant for HDL, hematocrit, or hemoglobin level. The results showed that both of TE and ME supplementation significantly decreased plasma level of triglycerides and LDL-cholesterol were also numerically increased with the addition of both TE and ME.展开更多
Objective To investigate the immunologic mechanism of acupuncture at Bǎihuì(百 会 GV 20) and Zúsānlǐ(足三里 ST 36) for treatment of depression. Methods Eighty-four cases of depression patients were ra...Objective To investigate the immunologic mechanism of acupuncture at Bǎihuì(百 会 GV 20) and Zúsānlǐ(足三里 ST 36) for treatment of depression. Methods Eighty-four cases of depression patients were randomly divided into an electroacupuncture observation group(group A), an electroacupuncture control group(group B) and a medication control group(group C), 28 cases in each group. Bǎihuì(百会 GV 20) and Zúsānlǐ(足三里 ST 36) were used in the group A; Tàichōng (太冲 LR 3), Sānyīnjiāo (三阴交 SP 6), Nèiguān (内关 PC 6) and Shénmén (神门 HT 7) were used in the group B; and the group C was treated with oral administration of Fluoxetine. The scores of Hamilton Depression Scale (HAMD) were tested and the level of serum interleukin 1(IL-1β), interleukin 6 (IL-6), and tumor necrosis factor α (TNF-α) were measured by Enzyme Linked Immunosorbent Assay (ELISA)before and after treatment. Results Their scores of HAMD were obviously decreased after treatment in three groups(all P0.01). In the group A, 2 cases were cured, 19 cases were markedly effective, 5 cases were effective and 2 cases were failed. In the group B, 16 cases were markedly effective, 12 cases were effective. While in the group C, 1 case was cured, 17 cases were markedly effective, 7 cases were effective and 3 cases were failed. The grade distribution of clinical effect showed that the effect of group A was better (P0.05). The levels of serum IL-1β and IL-6 in the three groups were obviously decreased after treatment (P0.05, P0.01), while there was no significant difference between the level of serum TNF-α before and after treatment. Conclusion The effect of electroacupuncture observation group is superior to those of electroacupuncture control group and medication control group.All of these three methods can clear the inflammatory cytokines such as IL-1β and IL-6 away and improve the symptoms of depression.展开更多
The Niutangjie tungsten deposit is a bedded skarn-type scheelite deposit and is located at the junction between Ziyuan and Xingan counties in the north of Guangxi,China.The deposit is genetically related to a fine-gra...The Niutangjie tungsten deposit is a bedded skarn-type scheelite deposit and is located at the junction between Ziyuan and Xingan counties in the north of Guangxi,China.The deposit is genetically related to a fine-grained two-mica granite within the orefield.Zircon LA-ICP-MS U-Pb dating of the granite yielded a Silurian(Caledonian)age of 421.8±2.4 Ma,which is contemporaneous with the adjacent Yuechengling batholith.Mineralization within the skarn is associated with a quartz,garnet,and diopside gangue,and scheelite is present in a number of different mineral assemblages,such as quartz-scheelite and quartz-sulfide-scheelite;these assemblages correspond to oxide and sulfide stages of mineralization.Sm-Nd isotope analysis of scheelite yielded an isochron age of 421±24 Ma.Although the uncertainty on this date is high,this age suggests that the scheelite mineralization formed during the Late Caledonian,at a similar time to the emplacement of the Niutangjie granite.Zircons within the granite have?Hf(t)values and Hf two-stage model ages of?6.5 to?11.6,and 1.79 to 2.11 Ga,respectively.These data suggest that the magma that formed the granite was derived from Mesoproterozoic crustal materials.Scheelite?Nd(t)values range from?13.06 to?13.26,also indicative of derivation from ancient crustal materials.Recent research has identified Caledonian magmatism in the western Nanling Range,indicating that this magmatism may be the source of contemporaneous tungsten mineralization.展开更多
The varicoloured Fenghuoshan Group occurs widely in the Qiangtang-Hoh Xil region of the northern Qinghai-Xizang Plateau. Few fossils have been found to date in this sedimentary succession because lithological conditio...The varicoloured Fenghuoshan Group occurs widely in the Qiangtang-Hoh Xil region of the northern Qinghai-Xizang Plateau. Few fossils have been found to date in this sedimentary succession because lithological conditions are not conducive to their preservation. As a result, there has been a long-term disagreement among geologists about its age. Despite a few lists of fossil names in individual publi- cations, no detailed research on the palaeontology, including palynology, has been reported previously. In this study, we recovered many pollen grains and spores from two samples that were collected on the northern slope of Fenghuo Moun- tain. They indicate an age no younger than Maastrichtian for the upper part of the Fenghuoshan Group. It is considered likely that the entire Fenghuoshan Group represents deposi- tion between the late Early Cretaceous (possibly Albian) and the Maastrichtian. The palynoflora consists mainly of angio- sperm pollen, gymnosperm pollen and fern and bryophyte spores being subordinate. Pollen grains referable to the Ephedrales and the Taxaceae-Cupressaceae groups dominate the assemblage, implying a warm, arid climate and subtropical forest-shrub vegetation at the time of deposition.展开更多
Objective: To observe the effect of electroacupuncture (EA) on the expressions of acetylcholine (ACh) and mucin 5AC (MUC5AC) in the lungs of rats with chronic obstructive pulmonary disease (COPD), and explore...Objective: To observe the effect of electroacupuncture (EA) on the expressions of acetylcholine (ACh) and mucin 5AC (MUC5AC) in the lungs of rats with chronic obstructive pulmonary disease (COPD), and explore the mechanism of EA in treating COPD. Methods: Thirty Sprague-Dawley (SD) rats were randomly divided into a control group, a COPD group, and an EA group, with 10 rats in each group. The control group was a group of normal rats. The COPD rat model was induced by cigarette smoke combined with lipopolysaccharide (LPS). The COPD rats were treated with EA at bilateral Feishu (BL 13) and Zusanli (ST 36) in the EA group, 30 rain each time, once a day, successively for 14 d. The lung function was tested. The contents of ACh and MUC5AC in lungs and bronchoalveolar lavage fluid (BALF) were detected by enzyme-linked immunosorbent assay (ELISA). Pearson method was used to analyze the correlation between pulmonary function and the content of MUC5AC in lungs. The mRNA and protein expressions of MUC5AC in lung tissues were detected by real-time polymerase chain reaction (RT-PCR) and Western blot (WB), respectively. The immune response of MUC5AC was observed by immunohistochemistry. Results: Eight rats were left in each group, and the other two died. Compared with the control group, the total airway resistance (Raw) increased significantly and dynamic compliance (Cdyn) decreased significantly in the COPD group (P〈0.01); compared with the COPD group, the Raw level declined significantly and Cdyn increased significantly in the EA group (P〈0.01). The contents of ACh and MUC5AC in the lungs and BALF were remarkably higher in the COPD group compared with those in the control group (P〈0.01, P〈0.001); compared with the COPD group, the contents of ACh and MUC5AC were significantly lower in the EA group (P〈0.05, P〈0.001). There was a negative correlation between MUC5AC content and lung function (P〈0.001). The mRNA and protein expressions of MUC5AC in the lungs were significantly higher in the COPD group than in the control group (P〈0.001); compared with the COPD group, the expressions were significantly lower in the EA group (P〈0.01). Compared with the control group, the immune response of MUC5AC in the airway epithelium significantly increased in the COPD group (P〈0.001); the immune response of MUC5AC was significantly lower in the EA group compared with that in the COPD group (P〈0.001). Conclusion: EA treatment can improve the lung function of COPD rats, which may be related to its effect in the down-regulation of ACh and MUC5AC contents in the lungs as well as the inhibition of mucus hypersecretion.展开更多
Human immunodeficiency virus-1 (HIV-1)encodes 15 viral proteins. Protein-protein interactions play a large role in the function of these proteins. In this study, we attempted to identify novel interactions between t...Human immunodeficiency virus-1 (HIV-1)encodes 15 viral proteins. Protein-protein interactions play a large role in the function of these proteins. In this study, we attempted to identify novel interactions between the HIV-1 proteins to better understand the role played by viral protein-protein interactions in the life cycle of HIV-I. Genes encoding the 15 viral proteins from the HIV-1 strain AD8 were inserted into the plasmids of a yeast two-hybrid system. By screening 120 pairs of proteins, interactions between seven pairs were found. This led to the discovery of an interaction between the HIV-1 proteins integrase (IN) and glycoprotein 41 (gp41), which was confirmed by both co-immunoprecipitation (Co-IP) assays and fluorescence resonance energy transfer (FRET) imaging in live cells. In addition, it was found that the amino acids at positions 76-100 of gp41 are required for it to bind to IN. Deletion of this region from gp41 prevented its interaction with IN and reduced the production of HIV-1 in 293T cells. This study provides new information on HIV-1 protein-protein interactions which improves the understanding of the biological functions of gp41 and IN during the virus life cycle.展开更多
High-frequency metre-scale cycles are present within the Lower-Middle Ordovician carbonate successions in northern Tarim Basin, NW China. These metre-scale cycles were variably dolomitised from top to bottom. Three ty...High-frequency metre-scale cycles are present within the Lower-Middle Ordovician carbonate successions in northern Tarim Basin, NW China. These metre-scale cycles were variably dolomitised from top to bottom. Three types of replacive dolomites were recognised, including dololaminite(very finely to finely crystalline, planar-s to nonplanar-a dolomite;type-1), patterned dolomite(finely crystalline, planar-s dolomite; type-2), and mottled dolomite(finely to medium crystalline,nonplanar-a(s) dolomite; type-3). Petrographic evidence indicate these dolomites were primarily deposited in supratidal to restricted subtidal environments, and formed in near-surface to shallow burial realms. Geochemically, all types of dolomites have similar δ13C and 87Sr/86 Sr ratios comparable to calcite precipitated in equilibrium with the Early-Middle Ordovician seawater. These geochemical attributes indicate that these dolomites were genetically associated and likely formed from connate seawater-derived brines. Of these, type-1 dolomite has δ18O values(.4.97‰ to.4.04‰ VPDB) slightly higher than those of normal seawater dolomite of the Early-Middle Ordovician age. Considering the absence of associated evaporites within type-1 dolomite, its parental fluids were likely represented by slightly evaporated(i.e., mesosaline to penesaline) seawater with salinity below that of gypsum precipitation. More depleted δ18O values(.7.74‰ to.5.20‰ VPDB) of type-2 dolomite and its stratigraphic position below type-1 dolomite indicate the generation of this dolomite from mesosaline to penesaline brines at higher temperatures in near-surface to shallow burial domains. Type-3 dolomite yields the most depleted δ18O values(–9.30‰to –7.28‰ VPDB), pointing to that it was most likely formed from coeval seawater-derived brines at highest temperatures in a shallow burial setting. There is a downward decreasing trend in δ18O values from type-1 through type-2 to type-3 dolomites, and in abundance of dolomites, indicating that the dolomitising fluids probably migrated downward from above and persisted into shallow burial conditions.展开更多
Cancer is still one of the important diseases that threatens the health of people. Multidrug resistance(MDR) is the main factor that leads to the failure of cancer chemotherapy. Thus, MDR diagnosis could facilitate th...Cancer is still one of the important diseases that threatens the health of people. Multidrug resistance(MDR) is the main factor that leads to the failure of cancer chemotherapy. Thus, MDR diagnosis could facilitate the monitoring of the therapy process and realization of efficient treatment of tumors. In this study, we have tried to use a new tetrathiafulvalene(TTF) derivative(TTF-(COONBu4)2) to sensitively recognize the MDR through the multi-signal responsive strategy. The relevant electrochemical and spectroscopic studies demonstrate the specific binding behavior of TTF-(COONBu4)2 with P-glycoprotein(P-gp) as well as drug-resistant leukemia cells. Especially due to the over-expression of specific components of P-gp on the plasma membranes of drug resistant cells, the electrochemical and hydrophilic/hydrophobic features of drug resistant-leukemia cells are apparently different from those of other kinds of leukemia cells. Meanwhile, Fourier transform infrared spectroscopic study illustrates that the most intense vibration band of TTF moieties in the 1400–1600 cm-1 range is almost smeared out upon binding to P-gp, and the binding of TTF-(COONBu4)2 to P-gp may also lead to changes in protein secondary structure and backbone. This observation may advance the development of the new TTF agent for the promising clinical diagnosis and monitoring of MDR of tumors with the aim of successful chemotherapy for human cancer.展开更多
文摘Chansitheca (Sphenopteris) wudaensis sp. nov. is described based on the materials collected from the Lower Permian Shansi Formation of Wuda, Nei Mongol, China. The frond is small and at least two times pinnate. The pinnule is sphenopteroid. The sori are borne on the abaxial surface of the pinnule, arranged in two rows parallel to the midvein, elliptic,and composed of 4-10 round sporangia. The indusium is absent. The annulus is transverse and complete, and consists of about 18 thickened cells. The features of the fertile parts, sori, sporangia and annulus and the absence of indusium indicate that the new species belongs to the Gleicheniaceae.
文摘42 middle-aged and old people at the age between 55-70 years were selected and given the warm needling at Zusanli (ST 36), and their IL-2 and NO contents of peripheral blood before and after acupuncture were determined. The results showed that IL-2 and NO contents increased significantly after the warm needling (P<0.01).
基金supported by grants from the Key Technologies Research and Development Program of China(2012BAD26B02)National Science Foundation of China(31272633+2 种基金31201760)Special Funding from the Ministry of Agriculture of China(201203081,201203086)Shanghai University Knowledge Service Platform(ZF1206)
文摘Insulin-like growth factor-binding protein 1 (IGFBP-1), a hypoxia-induced protein, is a member of the IGFBP family that regulates vertebrate growth and development. In this study, full-length IGFBP-la cDNA was cloned from a hypoxia-sensitive Cyprinidae fish species, the blunt snout bream (Megalobrama arnblycephala). IGFBP-la was expressed in various organs of adult blunt snout bream, including strongly in the liver and weakly in the gonads. Under hypoxia, IGFBP-la mRNA levels increased sharply in the skin, liver, kidney, spleen, intestine and heart tissues of juvenile blunt snout bream, but recovered to normal levels after 24-hour exposure to normal dissolved oxygen. In blunt snout bream embryos, IGFBP-la mRNA was expressed at very low levels at both four and eight hours post-fertilization, and strongly at later stages. Embryonic growth and development rates decreased significantly in embryos injected with IGFBP-la mRNA. The average body length of IGFBP-la-overexpressed embryos was 82.4% of that of the control group, and somite numbers decreased to 85.2%. These findings suggest that hypoxia-induced IGFBP-la may inhibit growth in this species under hypoxic conditions.
基金Supported by the National High Technology Research and Development Program of China("863"Program,No.2013AA102204)National Natural Science Foundation of China(No.31071509)+2 种基金program of Ministry of Science and Technology of China(No.2012YQ090194)Program of Beiyang Young Scholar of Tianjin University(2012)Program of Introducing Talents of Discipline to Universities of China(No.B06006)
文摘The aim of this work was to develop an alginate-casein composite microsphere as a bioaetive vehicle for oral administration of nutrients by a simple extrusion dripping method. Riboflavin was selected as a model drug, and the microencapsulation efficiency was raised to 97.94% after optimizing the preparation conditions by response surface methodology. In vitro release studies showed that riboflavin was released completely from alginate-casein microspheres in simulated intestinal fluids. Meanwhile, the morphology, structure and interaction between alginate and casein were characterized by scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) spectra.
文摘Flavorful meat and great economic importance, crabs and swimming crabs are appreciated throughout the Brazilian coast, where its waste is discarded by fishermen and consumers. In order to verify the centesimal composition, these animals caught in Sepetiba Bay (Rio de Janeiro, Brazil), 20 samples of Ucides cordatus, Cardisoma guanhumi, Menippe nodifrons, Callinectes danae and C. exaperatus had their edible and waste parts (shells and hepatopancreas) analyzed in the Laboratory of Bromatology of the UFRRJ. The analysis revealed that the meat of crustaceans is protein (12.68% to 25.56%) and low in fat (0.37% to 0.67%), sticking to a more demanding consumer market for thin products; the waste has already presented a protein content ranging from 15.75% to 27.64% and fat from 0.75% to 3.27%, with values of calcium (17.96% to 25.23%) and phosphorus (0.93% to 1.55%), setting a precedent for use in animal feed through future studies in area.
文摘To observe effect of moxibustion at Zusanli (足三里 ST 36) and Liangmen (梁门 ST 21 ) on expression of heat shock protein 70 (HSP70) in gastric mucosa of the rat of stress ulcer (SU) to explore the mechanism of moxibustion in resisting oxidative injury of the gastric mucosa. Methods: Sixty SD rats were evenly randomized into 4 groups, a blank group, a model group, an acupoint moxibustion group and a non-acupoint moxibustion group. Water restraint stress (WRS) method was used to make stress gastric ulcer rat model. The ulcerative index (Ul) of gastric mucosa was evaluated by using GUTH method, the gastric mu- cosa blood flux (GMBF) was detected by a laser Doppler bloodflow monitor, and HSP70 expression and malondialdehyde (MDA) content in the gastric mucosa were determined respectively with immunohistochemical and thiobarbiturate methods. Results: Moxibustion at Zusanli (ST 36) and Liangmen (ST 21 ) significantly de- creased Ul, up-regulated HSP70 expression, increased GMBF, and decreased MDA content in the gastric mucosa in the rat of stress gastric ulcer, with significant differences as compared with the model group and the non-acupoint moxibustion group (P 〈 0.05 or P 〈 0.01 ). Conclusion: Moxibustion at Zusanli (ST 36) and Liangmen (ST 21 ) can induce high expression of HSP70 and decrease MDA content in the gastric mucosa, so as to resist oxidative injury, with relative acupoint specificity.
基金Supported by the Hong Kong Research Grant Council(605009)the Hong Kong Innovation Technology Fund(ITS/108/09FP)the Environment and Conservation Fund(ECWW11EG02)
文摘The silk sericin is the main residue in silk production and it is found to be a low cost and efficient bio-sorbent. In this study, sericin was characterized with various techniques including SEM (scanning electron micro- scope), XRD, N2 physisorption, FTIR (Fourier transformed infrared spectroscopy) and XPS (X-ray photoelectron spectroscopy). The nitrogen content of sericin was ca. 8.5 mmol.g-1 according to elemental analysis. Dye adsorption by sericin biosorbent was investigated with the acid yellow (AY), methylene blue (MB) and copper (II) phthalocyanine-3,4'4"4'"-tetrasulfonic acid (CuPc) dyes from water. Sericin displayed large capacity for AY andCuPc adsorption with adsorption capacities of respectively 3.1 and 0.35 mmol.g-1, but it did not adsorbed methyl- ene blue dye. This selectivity is due to the basicity of amide groups in seriein biosorbents.
文摘AIM: To examine the effectiveness of human placental inhibitors, by injecting vitamin E to rats with transplanted Morris-5123 hepatoma, on the expression of cathepsins B and L in tumor, liver, lung and blood sera after transplantation of Morris 5123 hepatoma. METHODS: Animals were divided into 10 groups receiving three different concentrations of vitamin E and inhibitors along or in combination and compared with negative control (healthy rats) and positive control (tumor rats). Effectiveness of treatment was evaluated with regard to survival time, tumor response and determination of the activities of proteolytic enzymes and their inhibitors using flurogenic substrates. RESULTS: Cathepsins B and L activities were elevated by 16-fold in comparison with negative control tissues, and their endogenous inhibitor activity decreased by 1.2-fold before treatment. In several cases, tumors completely disappeared following vitamin E plus human placental cyteine protease inhibitor (CPI) compared with controls. The number of complete tumor responses was higher when 20 m/kg vitamin E plus 400 μg of CPI was used, i.e. 7/10 rats survived more than two mo. Cathepsins B and L were expressed significantly in tumor, liver, lung tissues and sera in parallel to the increasing of the endogenous inhibitor activity compared with the controls after treatment(P<0.0001) CONCLUSION: The data indicate formation of metastasis significantly reduced in treated rats, which might provide a therapeutic basis for anti-cancer therapy.
文摘Ulysses, the towering mythological figure and the hero of the world's most famous epic The Odyssey, put on the pretence of madness to shirk the Trojan War. This is not mentioned in Homer, but in Fabulae by Gaius Julius Hyginus. Similarly, Hamlet put on an "antic disposition" after the ghost exhorted him to kill King Claudius. In these two cases taken from mythology and literature, and pertaining to the Classical period and the Elizabethan age respectively, intelligent characters put on the pretence of madness, in their battle with society though they are in control of their senses. It is the aim of this paper to examine the dynamics of reason and non-reason when combined and brought so close to one another, that they could be easily confounded, in light of Derrida's reading of Descartes' formulations about reason. Since the two examined works pertain to the Classical and Elizabethan ages respectively, the paper will shed light on the historical background of madness in these periods to give a broader perspective of reason and madness in these works.
文摘A total of 280-day-old broilers (Ross 308) were randomly assigned to seven groups each containing for replicates with 10 chicks. The control group received the corn soybean meal based diet. In the treatment groups the basal diet was supplemented with one of following 0.2%, 0.4% and 0.6% Thyme and Mint extracts. Triglyceride was significantly decreased by addition of 0.2% and 0.4% of Thyme extract (TE). The TE supplemented diets contained significantly lower cholesterol concentration and low density lipoprotein compared to the control diet. High density lipoprotein content was not significantly affected by dietary treatments. Likewise, differences among groups were not significant for hematocrit and hemoglobin level. The addition of Mint extract (ME) to the broiler diet led to a significant reduction in the triglyceride, cholesterol concentration and LDL. Differences among groups were not significant for HDL, hematocrit, or hemoglobin level. The results showed that both of TE and ME supplementation significantly decreased plasma level of triglycerides and LDL-cholesterol were also numerically increased with the addition of both TE and ME.
基金Supported by The Specific Chinese Medicine Project of Chinese Medical Science and Technology, The State Administration of Traditional Chinese Medicine: 04-05 LP 10
文摘Objective To investigate the immunologic mechanism of acupuncture at Bǎihuì(百 会 GV 20) and Zúsānlǐ(足三里 ST 36) for treatment of depression. Methods Eighty-four cases of depression patients were randomly divided into an electroacupuncture observation group(group A), an electroacupuncture control group(group B) and a medication control group(group C), 28 cases in each group. Bǎihuì(百会 GV 20) and Zúsānlǐ(足三里 ST 36) were used in the group A; Tàichōng (太冲 LR 3), Sānyīnjiāo (三阴交 SP 6), Nèiguān (内关 PC 6) and Shénmén (神门 HT 7) were used in the group B; and the group C was treated with oral administration of Fluoxetine. The scores of Hamilton Depression Scale (HAMD) were tested and the level of serum interleukin 1(IL-1β), interleukin 6 (IL-6), and tumor necrosis factor α (TNF-α) were measured by Enzyme Linked Immunosorbent Assay (ELISA)before and after treatment. Results Their scores of HAMD were obviously decreased after treatment in three groups(all P0.01). In the group A, 2 cases were cured, 19 cases were markedly effective, 5 cases were effective and 2 cases were failed. In the group B, 16 cases were markedly effective, 12 cases were effective. While in the group C, 1 case was cured, 17 cases were markedly effective, 7 cases were effective and 3 cases were failed. The grade distribution of clinical effect showed that the effect of group A was better (P0.05). The levels of serum IL-1β and IL-6 in the three groups were obviously decreased after treatment (P0.05, P0.01), while there was no significant difference between the level of serum TNF-α before and after treatment. Conclusion The effect of electroacupuncture observation group is superior to those of electroacupuncture control group and medication control group.All of these three methods can clear the inflammatory cytokines such as IL-1β and IL-6 away and improve the symptoms of depression.
基金financially supported by National Natural Science Foundation of China (Grant Nos. 41172074, 41230315)Ministry of Science and Technology of China (Grant No. 2012CB416704)+1 种基金China Geological Survey (Grant No. 1212010632100)Deep Exploration Program of the Ministry of Land and Resources (Grant No. 201011046)
文摘The Niutangjie tungsten deposit is a bedded skarn-type scheelite deposit and is located at the junction between Ziyuan and Xingan counties in the north of Guangxi,China.The deposit is genetically related to a fine-grained two-mica granite within the orefield.Zircon LA-ICP-MS U-Pb dating of the granite yielded a Silurian(Caledonian)age of 421.8±2.4 Ma,which is contemporaneous with the adjacent Yuechengling batholith.Mineralization within the skarn is associated with a quartz,garnet,and diopside gangue,and scheelite is present in a number of different mineral assemblages,such as quartz-scheelite and quartz-sulfide-scheelite;these assemblages correspond to oxide and sulfide stages of mineralization.Sm-Nd isotope analysis of scheelite yielded an isochron age of 421±24 Ma.Although the uncertainty on this date is high,this age suggests that the scheelite mineralization formed during the Late Caledonian,at a similar time to the emplacement of the Niutangjie granite.Zircons within the granite have?Hf(t)values and Hf two-stage model ages of?6.5 to?11.6,and 1.79 to 2.11 Ga,respectively.These data suggest that the magma that formed the granite was derived from Mesoproterozoic crustal materials.Scheelite?Nd(t)values range from?13.06 to?13.26,also indicative of derivation from ancient crustal materials.Recent research has identified Caledonian magmatism in the western Nanling Range,indicating that this magmatism may be the source of contemporaneous tungsten mineralization.
基金supported by the Strategic Priority Research Program (B) of the Chinese Academy of Sciences(XDB03010103)the National Basic Research Program of China(2012CB822004)the National Natural Science Foundation of China(41172011)
文摘The varicoloured Fenghuoshan Group occurs widely in the Qiangtang-Hoh Xil region of the northern Qinghai-Xizang Plateau. Few fossils have been found to date in this sedimentary succession because lithological conditions are not conducive to their preservation. As a result, there has been a long-term disagreement among geologists about its age. Despite a few lists of fossil names in individual publi- cations, no detailed research on the palaeontology, including palynology, has been reported previously. In this study, we recovered many pollen grains and spores from two samples that were collected on the northern slope of Fenghuo Moun- tain. They indicate an age no younger than Maastrichtian for the upper part of the Fenghuoshan Group. It is considered likely that the entire Fenghuoshan Group represents deposi- tion between the late Early Cretaceous (possibly Albian) and the Maastrichtian. The palynoflora consists mainly of angio- sperm pollen, gymnosperm pollen and fern and bryophyte spores being subordinate. Pollen grains referable to the Ephedrales and the Taxaceae-Cupressaceae groups dominate the assemblage, implying a warm, arid climate and subtropical forest-shrub vegetation at the time of deposition.
文摘Objective: To observe the effect of electroacupuncture (EA) on the expressions of acetylcholine (ACh) and mucin 5AC (MUC5AC) in the lungs of rats with chronic obstructive pulmonary disease (COPD), and explore the mechanism of EA in treating COPD. Methods: Thirty Sprague-Dawley (SD) rats were randomly divided into a control group, a COPD group, and an EA group, with 10 rats in each group. The control group was a group of normal rats. The COPD rat model was induced by cigarette smoke combined with lipopolysaccharide (LPS). The COPD rats were treated with EA at bilateral Feishu (BL 13) and Zusanli (ST 36) in the EA group, 30 rain each time, once a day, successively for 14 d. The lung function was tested. The contents of ACh and MUC5AC in lungs and bronchoalveolar lavage fluid (BALF) were detected by enzyme-linked immunosorbent assay (ELISA). Pearson method was used to analyze the correlation between pulmonary function and the content of MUC5AC in lungs. The mRNA and protein expressions of MUC5AC in lung tissues were detected by real-time polymerase chain reaction (RT-PCR) and Western blot (WB), respectively. The immune response of MUC5AC was observed by immunohistochemistry. Results: Eight rats were left in each group, and the other two died. Compared with the control group, the total airway resistance (Raw) increased significantly and dynamic compliance (Cdyn) decreased significantly in the COPD group (P〈0.01); compared with the COPD group, the Raw level declined significantly and Cdyn increased significantly in the EA group (P〈0.01). The contents of ACh and MUC5AC in the lungs and BALF were remarkably higher in the COPD group compared with those in the control group (P〈0.01, P〈0.001); compared with the COPD group, the contents of ACh and MUC5AC were significantly lower in the EA group (P〈0.05, P〈0.001). There was a negative correlation between MUC5AC content and lung function (P〈0.001). The mRNA and protein expressions of MUC5AC in the lungs were significantly higher in the COPD group than in the control group (P〈0.001); compared with the COPD group, the expressions were significantly lower in the EA group (P〈0.01). Compared with the control group, the immune response of MUC5AC in the airway epithelium significantly increased in the COPD group (P〈0.001); the immune response of MUC5AC was significantly lower in the EA group compared with that in the COPD group (P〈0.001). Conclusion: EA treatment can improve the lung function of COPD rats, which may be related to its effect in the down-regulation of ACh and MUC5AC contents in the lungs as well as the inhibition of mucus hypersecretion.
基金supported by the National Nano Project(grant no.2011CB933600)the National Natural Science Foundation of China(grant no.31470269)supported by the Institute of Biophysics and the National Laboratory of Biomacromolecules at the Chinese Academy of Sciences(CAS)
文摘Human immunodeficiency virus-1 (HIV-1)encodes 15 viral proteins. Protein-protein interactions play a large role in the function of these proteins. In this study, we attempted to identify novel interactions between the HIV-1 proteins to better understand the role played by viral protein-protein interactions in the life cycle of HIV-I. Genes encoding the 15 viral proteins from the HIV-1 strain AD8 were inserted into the plasmids of a yeast two-hybrid system. By screening 120 pairs of proteins, interactions between seven pairs were found. This led to the discovery of an interaction between the HIV-1 proteins integrase (IN) and glycoprotein 41 (gp41), which was confirmed by both co-immunoprecipitation (Co-IP) assays and fluorescence resonance energy transfer (FRET) imaging in live cells. In addition, it was found that the amino acids at positions 76-100 of gp41 are required for it to bind to IN. Deletion of this region from gp41 prevented its interaction with IN and reduced the production of HIV-1 in 293T cells. This study provides new information on HIV-1 protein-protein interactions which improves the understanding of the biological functions of gp41 and IN during the virus life cycle.
基金supported by Petrochemical Joint Foundation of China (Grant No. U1663209)National Natural Science Foundation of China (Grant No. 41502118)
文摘High-frequency metre-scale cycles are present within the Lower-Middle Ordovician carbonate successions in northern Tarim Basin, NW China. These metre-scale cycles were variably dolomitised from top to bottom. Three types of replacive dolomites were recognised, including dololaminite(very finely to finely crystalline, planar-s to nonplanar-a dolomite;type-1), patterned dolomite(finely crystalline, planar-s dolomite; type-2), and mottled dolomite(finely to medium crystalline,nonplanar-a(s) dolomite; type-3). Petrographic evidence indicate these dolomites were primarily deposited in supratidal to restricted subtidal environments, and formed in near-surface to shallow burial realms. Geochemically, all types of dolomites have similar δ13C and 87Sr/86 Sr ratios comparable to calcite precipitated in equilibrium with the Early-Middle Ordovician seawater. These geochemical attributes indicate that these dolomites were genetically associated and likely formed from connate seawater-derived brines. Of these, type-1 dolomite has δ18O values(.4.97‰ to.4.04‰ VPDB) slightly higher than those of normal seawater dolomite of the Early-Middle Ordovician age. Considering the absence of associated evaporites within type-1 dolomite, its parental fluids were likely represented by slightly evaporated(i.e., mesosaline to penesaline) seawater with salinity below that of gypsum precipitation. More depleted δ18O values(.7.74‰ to.5.20‰ VPDB) of type-2 dolomite and its stratigraphic position below type-1 dolomite indicate the generation of this dolomite from mesosaline to penesaline brines at higher temperatures in near-surface to shallow burial domains. Type-3 dolomite yields the most depleted δ18O values(–9.30‰to –7.28‰ VPDB), pointing to that it was most likely formed from coeval seawater-derived brines at highest temperatures in a shallow burial setting. There is a downward decreasing trend in δ18O values from type-1 through type-2 to type-3 dolomites, and in abundance of dolomites, indicating that the dolomitising fluids probably migrated downward from above and persisted into shallow burial conditions.
基金supported by the National Natural Science Foundation of China(81325011)the National High Technology Research&Development Program of China(2012AA022703)+1 种基金the National Basic Research Program of China(2010CB732404)the Major Science&Technology Project of Suzhou(ZXY2012028)
文摘Cancer is still one of the important diseases that threatens the health of people. Multidrug resistance(MDR) is the main factor that leads to the failure of cancer chemotherapy. Thus, MDR diagnosis could facilitate the monitoring of the therapy process and realization of efficient treatment of tumors. In this study, we have tried to use a new tetrathiafulvalene(TTF) derivative(TTF-(COONBu4)2) to sensitively recognize the MDR through the multi-signal responsive strategy. The relevant electrochemical and spectroscopic studies demonstrate the specific binding behavior of TTF-(COONBu4)2 with P-glycoprotein(P-gp) as well as drug-resistant leukemia cells. Especially due to the over-expression of specific components of P-gp on the plasma membranes of drug resistant cells, the electrochemical and hydrophilic/hydrophobic features of drug resistant-leukemia cells are apparently different from those of other kinds of leukemia cells. Meanwhile, Fourier transform infrared spectroscopic study illustrates that the most intense vibration band of TTF moieties in the 1400–1600 cm-1 range is almost smeared out upon binding to P-gp, and the binding of TTF-(COONBu4)2 to P-gp may also lead to changes in protein secondary structure and backbone. This observation may advance the development of the new TTF agent for the promising clinical diagnosis and monitoring of MDR of tumors with the aim of successful chemotherapy for human cancer.