Inoculated fermentation enables rapid fermentation of aquatic products.No studies have been conducted on the lipid profiles of inoculated fermented golden pompano(Trachinotus ovatus).In this study,a lipase-producing B...Inoculated fermentation enables rapid fermentation of aquatic products.No studies have been conducted on the lipid profiles of inoculated fermented golden pompano(Trachinotus ovatus).In this study,a lipase-producing Bacillus subtilis with salt tolerance was screened from traditionally fermented golden pompano(TF)and used as a starter culture.Whole-genome sequencing analysis revealed it carries 4 clustered regularly interspaced short vpalindromic repeats structures and 2 genes encoding triacylglycerol lipase.Untargeted lipidomics identified lipid molecules(833)in 6 major classes from B.subtilis SCSMX-2 fermented golden pompano(IF).A total of 28 lipid molecules were upregulated in IF,including phosphatidylcholines(PCs),triacylglycerols(TAGs),and lysophosphatidylcholine.B.subtilis supplementation enhanced the production of polyenyl PCs and mediumand long-chain TAGs.The IF rich in linoleic,docosahexaenoic acids(DHA),and eicosapentaenoic acid were primarily distributed in the sn-2 position of DHA,PC and phosphatidylethanolamine.This research revealed the lipid profiles of IF,providing theoretical basis for the application of B.subtilis in the fermented fish industry.展开更多
"Look at this!This one grows well and big.And its shape,so round and plump.How.adorable,"exclaimed Pema Chosphel as he carefully unearthed a palm-sized gastrodia from the damp soil.Overjoyed,he called his fa..."Look at this!This one grows well and big.And its shape,so round and plump.How.adorable,"exclaimed Pema Chosphel as he carefully unearthed a palm-sized gastrodia from the damp soil.Overjoyed,he called his father to share his excitement.展开更多
Nujiang farmers use the innovative dryland rice cultivation technology developed by a Chinese expert team to grow yields and income.As April ushers in spring,mist clings to the deep valleys of the Nujiang Grand Canyon...Nujiang farmers use the innovative dryland rice cultivation technology developed by a Chinese expert team to grow yields and income.As April ushers in spring,mist clings to the deep valleys of the Nujiang Grand Canyon in Southwest China’s Yunnan Province.High on a mountainside in Ziji Village,Daxingdi Town,Lushui City,Nujiang Lisu Autonomous Prefecture,at an altitude exceeding 1,300 metres,62-year-old Lisu villager Cha Wenxing is planting rice.These demonstration plots,cultivating high-quality upland rice,seem to float amongst the clouds.展开更多
This year marks the 50th anniversary of China-Thailand diplomatic relations as well as the“Golden Jubilee of China-Thailand Friendship.”From February 5 to 8,Thai Prime Minister Paetongtarn Shinawatra made an officia...This year marks the 50th anniversary of China-Thailand diplomatic relations as well as the“Golden Jubilee of China-Thailand Friendship.”From February 5 to 8,Thai Prime Minister Paetongtarn Shinawatra made an official visit to China.On February 8,the two sides issued the Joint Statement between the Government of the Kingdom of Thailand and the Government of the People’s Republic of China on Advancing the Comprehensive Strategic Cooperative Partnership and Building a Thailand-China Community with a Shared Future for Enhanced Stability,Prosperity,and Sustainability through a Forwardlooking and People-Centred Vision.展开更多
As part of events marking the 50th anniversary of diplomatic ties between China and Thailand,a forum themed“Our Golden Friendship:Joining Hands to Build a China-Thailand Community with a Shared Future”was held in Ba...As part of events marking the 50th anniversary of diplomatic ties between China and Thailand,a forum themed“Our Golden Friendship:Joining Hands to Build a China-Thailand Community with a Shared Future”was held in Bangkok on January 17,aiming to deepen mutual trust and enhance exchange between Chinese and Thai media and think tanks.展开更多
This year marks the 50th anniversary of the establishment of China-Thailand diplomatic relations and the“Golden Jubilee of China-Thailand Friendship.”Over the decades,fruitful results have been achieved in bilateral...This year marks the 50th anniversary of the establishment of China-Thailand diplomatic relations and the“Golden Jubilee of China-Thailand Friendship.”Over the decades,fruitful results have been achieved in bilateral cooperation in fields such as politics,economics,security,and cultural exchange.So,what are the key factors contributing to the enduring friendship and the remarkable achievements in bilateral cooperation?And,how does strengthened comprehensive strategic partnership and joint construction of a more stable,prosperous,and sustainable China-Thailand community with a shared future benefit both countries,the region,and even the world?展开更多
To address the problem of high lifespan loss and poor state of charge(SOC)balance of electric vehicles(EVs)participating in grid peak shaving,an improved golden eagle optimizer(IGEO)algorithm for EV grouping control s...To address the problem of high lifespan loss and poor state of charge(SOC)balance of electric vehicles(EVs)participating in grid peak shaving,an improved golden eagle optimizer(IGEO)algorithm for EV grouping control strategy is proposed for peak shaving sce-narios.First,considering the difference between peak and valley loads and the operating costs of EVs,a peak shaving model for EVs is constructed.Second,the design of IGEO has improved the global exploration and local development capabilities of the golden eagle optimizer(GEO)algorithm.Subsequently,IGEO is used to solve the peak shaving model and obtain the overall EV grid connected charging and discharging instructions.Next,using the k-means algorithm,EVs are dynamically divided into priority charging groups,backup groups,and priority discharging groups based on SOC differences.Finally,a dual layer power distribution scheme for EVs is designed.The upper layer determines the charging and discharging sequences and instructions for the three groups of EVs,whereas the lower layer allocates the charging and discharging instructions for each group to each EV.The proposed strategy was simulated and verified,and the results showed that the designed IGEO had faster optimization speed and higher optimization accuracy.The pro-posed EV grouping control strategy effectively reduces the peak-valley difference in the power grid,reduces the operational life loss of EVs,and maintains a better SOC balance for EVs.展开更多
Molecular cloning remains a cornerstone technique in genetic engineering and synthetic biology.In this study,we conducted a systematic comparative analysis between the classical cloning method and the Golden Gate asse...Molecular cloning remains a cornerstone technique in genetic engineering and synthetic biology.In this study,we conducted a systematic comparative analysis between the classical cloning method and the Golden Gate assembly technique,utilizing Escherichia coli as the model organism.Through polymerase chain reaction(PCR)amplification,restriction enzyme digestion,ligation,transformation,and Sanger sequencing,we assessed the operational efficiency and cloning fidelity of both strategies.Our results demonstrated that Golden Gate assembly,leveraging type IIS restriction enzymes and simultaneous ligation,significantly enhanced cloning efficiency and precision,particularly for seamless multi-fragment assembly.In contrast,the classical cloning approach maintained certain advantages in simplicity and robustness for specific experimental conditions.Challenges encountered during transformation and sequencing highlighted the critical impact of technical accuracy on experimental outcomes.This study underscores the importance of selecting appropriate cloning methodologies tailored to experimental objectives and laboratory capabilities,providing a foundation for optimized molecular cloning workflows in future synthetic biology and biotechnology applications.展开更多
In this paper,the necessity of constructing a golden course for Advanced Mathematics is presented.For teachers,golden courses enhance their teaching ability and job satisfaction.For students,golden courses improve the...In this paper,the necessity of constructing a golden course for Advanced Mathematics is presented.For teachers,golden courses enhance their teaching ability and job satisfaction.For students,golden courses improve their sense of learning value and significance and encourage them to actively learn and participate deeply.Next,the relevant content of course ideological and political construction is provided.Finally,a specific approach was proposed to create a golden course for Advanced Mathematics by integrating ideological and political education into the curriculum.展开更多
Reliable Cluster Head(CH)selectionbased routing protocols are necessary for increasing the packet transmission efficiency with optimal path discovery that never introduces degradation over the transmission reliability...Reliable Cluster Head(CH)selectionbased routing protocols are necessary for increasing the packet transmission efficiency with optimal path discovery that never introduces degradation over the transmission reliability.In this paper,Hybrid Golden Jackal,and Improved Whale Optimization Algorithm(HGJIWOA)is proposed as an effective and optimal routing protocol that guarantees efficient routing of data packets in the established between the CHs and the movable sink.This HGJIWOA included the phases of Dynamic Lens-Imaging Learning Strategy and Novel Update Rules for determining the reliable route essential for data packets broadcasting attained through fitness measure estimation-based CH selection.The process of CH selection achieved using Golden Jackal Optimization Algorithm(GJOA)completely depends on the factors of maintainability,consistency,trust,delay,and energy.The adopted GJOA algorithm play a dominant role in determining the optimal path of routing depending on the parameter of reduced delay and minimal distance.It further utilized Improved Whale Optimisation Algorithm(IWOA)for forwarding the data from chosen CHs to the BS via optimized route depending on the parameters of energy and distance.It also included a reliable route maintenance process that aids in deciding the selected route through which data need to be transmitted or re-routed.The simulation outcomes of the proposed HGJIWOA mechanism with different sensor nodes confirmed an improved mean throughput of 18.21%,sustained residual energy of 19.64%with minimized end-to-end delay of 21.82%,better than the competitive CH selection approaches.展开更多
A symmetrical quartic polynomial, named golden one, can be connected to coefficients of the icosahedron equation as well as to the gyromagnetic correction of the electron and to number 137. This number is not a mystic...A symmetrical quartic polynomial, named golden one, can be connected to coefficients of the icosahedron equation as well as to the gyromagnetic correction of the electron and to number 137. This number is not a mystic one, but is connected with the inverse of Sommerfeld’s fine-structure constant and this way again connected with the electron. From number-theoretical realities, including the reciprocity relation of the golden ratio as effective pre-calculator of nature’s creativeness, a proposed closeness to the icosahedron may point towards the structure of the electron, thought off as a single-strand compacted helically self-confined charged elemantary particle of less spherical but assumed blunted icosahedral shape generated from a high energy double-helix photon. We constructed a chiral Moebius “ball” from a 13 times 180˚twisted double helix strand, where the turning points of 12 generated slings were arranged towards the vertices of a regular icosahedron, belonging to the non-centrosymmetric rotation group I532. Mathematically put, we convert the helical motion of an energy quantum into a stationary motion on a Moebius stripe structure. The radius of the ball is about the Compton radius. This chiral closed circuit Moebius ball motion profile can be tentatively thought off as the dominant quantum vortex structure of the electron, and the model may be named CEWMB (Charged Electromagnetic Wave Moebius Ball). Also the gyromagnetic factor of the electron (g<sub>e</sub> = 2.002319) can be traced back to this special structure. However, nature’s energy infinity principle would suggest a superposition with additional less dominant (secondary) structures, governed also by the golden mean. A suggestion about the possible structure of delocalized hole carriers in the superconducting state is given.展开更多
The golden apple snail Pomacea canaliculata （Lamarck 1819） was first recorded at Black Dragon Spring, Dianchi Basin, Baiyi Township, Songming County, Kunming City, Yunnan Province, China, in October 2004. The water ...The golden apple snail Pomacea canaliculata （Lamarck 1819） was first recorded at Black Dragon Spring, Dianchi Basin, Baiyi Township, Songming County, Kunming City, Yunnan Province, China, in October 2004. The water from the spring flows into the Songhuaba Reservoir, the major drinking water resource for Kunming City, and part of the Dianchi Lake basin. This is the first record of this invasive snail in the Dianchi Lake Basin. Pomacea canaliculata originates from Central and South America, and in Asia the snail has spread through deliberate and accidental introductions to the Philippines, Vietnam, Thailand, Laos, Cambodia, Malaysia, Indonesia, Papua New Guinea, Korea, Japan and South China. It has become a major pest in rice-growing areas, resulting in huge damage to crops. Strict prevention and control measures have to be implemented to prevent the spread of the snail in Yunnan, together with public awareness campaigns to inform the public of the dangers of this invasive snail.展开更多
In July 2006, the diurnal activity rhythms of 13 heads of captive Qinling golden takin were observed in Shaanxi Provincial Centre for the Breeding and Conservation of Rare Wildlife （SPCBCRW） at daylight （from 9：00...In July 2006, the diurnal activity rhythms of 13 heads of captive Qinling golden takin were observed in Shaanxi Provincial Centre for the Breeding and Conservation of Rare Wildlife （SPCBCRW） at daylight （from 9：00 am to 4：00 pm in July）. The behavioral ethnogram was identified through observation at the sampling site, with the behaviors of golden takin recorded at 5 min interval using instantaneous scannable sampling method. The results indicated that the resting of golden takin took an important part in the daylight activities. Meanwhile, drinking and urinating and defecating were 1.92 and 0.54 and 0.92 times per head per day. Ambient temperature had a strong effect on the diurnal activity rhythms of golden takin. The diurnal activity rhymes were affected by ages of the animals effectively, which was expressed through differentiation of the time budgets. Moreover, different individuals in the same population showed some non-synchronously activity rhythms.展开更多
[Objective] This study aimed to identify the in vitro antibacterial activity of golden buckwheat extract and investigate the therapeutic effect of its preparation on mycoplasma infection. [Method] Through measuring th...[Objective] This study aimed to identify the in vitro antibacterial activity of golden buckwheat extract and investigate the therapeutic effect of its preparation on mycoplasma infection. [Method] Through measuring the minimum inhibitory concentra-tion, the in vitro antibacterial activity of golden buckwheat water extract was deter-mined; meanwhile, the therapeutic effect of golden buckwheat oral solution on my-coplasma infection was determined by artificial y infecting chickens with Mycoplasma gal isepticum culture. [Results] The golden buckwheat water extract had obvious in-hibitory effects against Pseudomonas aeruginosa and Escherichia coli, and a certain inhibitory effect on Salmonel a and Staphylococcus aureus; administration of golden buckwheat oral solution at the dose of 0.5%-1.0% continuously for 5 d had a good therapeutic effect against mycoplasma infection. [Conclusion] The study provides sci-entific bases for further study on the antibacterial activity of golden buckwheat and its application.展开更多
In order to screen the effective preventive drugs for saprolegniasis occurred during hatching of the fertilized eggs of golden trout, effects of two kinds of self-made Chinese herbal compounds（AB） and two kinds of c...In order to screen the effective preventive drugs for saprolegniasis occurred during hatching of the fertilized eggs of golden trout, effects of two kinds of self-made Chinese herbal compounds（AB） and two kinds of chemical bactericides（peroxyacetic acid andhydrogen peroxide, CD） with three disinfection concentrations were compared in this study. The fertilized eggs of golden trout were randomly divided into 13 groups, each group with two parallels of 1 000 eggs. Drugs at high,medium and low concentration were respectively used to immerse the fertilized eggs35 min for disinfection once a day. The numbers of live and dead eggs were recorded each day before disinfection and the numbers of survival eyed eggs were counted in each experimental group after finishing the whole test. The results indicated that all of four kinds of drugs used here had a certain effect on prevention and control of saprolegniasis during hatching of fertilized eggs of golden trout, and also showed a correlation between the concentrations and effects. After the selection of several drugs, we found that group B-medium, C-medium and D-high exhibited the most remarkable effects on control of saprolegniasis. However, careful consideration should be given to chemical drugs residues and their potential hazard to the eyed eggs. Therefore, Chinese herbal compound B was suggested to be used for prevention and control of saprolegniasis to achieve the healthy aquaculture. And the concentration and operation time of Chinese herbal compound B should be strictly controlled when used in disinfection of fertilized eggs.展开更多
基金supported by the National Natural Science Foundation of China(32372367)the earmarked fund for CARS(CARS-47)+1 种基金Natural Science Foundation of Hainan Provine(323CXTD391)the Special Scientific Research Funds for Central Non-profit Institutes and the Chinese Academy of Fishery Sciences(2020TD69)。
文摘Inoculated fermentation enables rapid fermentation of aquatic products.No studies have been conducted on the lipid profiles of inoculated fermented golden pompano(Trachinotus ovatus).In this study,a lipase-producing Bacillus subtilis with salt tolerance was screened from traditionally fermented golden pompano(TF)and used as a starter culture.Whole-genome sequencing analysis revealed it carries 4 clustered regularly interspaced short vpalindromic repeats structures and 2 genes encoding triacylglycerol lipase.Untargeted lipidomics identified lipid molecules(833)in 6 major classes from B.subtilis SCSMX-2 fermented golden pompano(IF).A total of 28 lipid molecules were upregulated in IF,including phosphatidylcholines(PCs),triacylglycerols(TAGs),and lysophosphatidylcholine.B.subtilis supplementation enhanced the production of polyenyl PCs and mediumand long-chain TAGs.The IF rich in linoleic,docosahexaenoic acids(DHA),and eicosapentaenoic acid were primarily distributed in the sn-2 position of DHA,PC and phosphatidylethanolamine.This research revealed the lipid profiles of IF,providing theoretical basis for the application of B.subtilis in the fermented fish industry.
文摘"Look at this!This one grows well and big.And its shape,so round and plump.How.adorable,"exclaimed Pema Chosphel as he carefully unearthed a palm-sized gastrodia from the damp soil.Overjoyed,he called his father to share his excitement.
文摘Nujiang farmers use the innovative dryland rice cultivation technology developed by a Chinese expert team to grow yields and income.As April ushers in spring,mist clings to the deep valleys of the Nujiang Grand Canyon in Southwest China’s Yunnan Province.High on a mountainside in Ziji Village,Daxingdi Town,Lushui City,Nujiang Lisu Autonomous Prefecture,at an altitude exceeding 1,300 metres,62-year-old Lisu villager Cha Wenxing is planting rice.These demonstration plots,cultivating high-quality upland rice,seem to float amongst the clouds.
文摘This year marks the 50th anniversary of China-Thailand diplomatic relations as well as the“Golden Jubilee of China-Thailand Friendship.”From February 5 to 8,Thai Prime Minister Paetongtarn Shinawatra made an official visit to China.On February 8,the two sides issued the Joint Statement between the Government of the Kingdom of Thailand and the Government of the People’s Republic of China on Advancing the Comprehensive Strategic Cooperative Partnership and Building a Thailand-China Community with a Shared Future for Enhanced Stability,Prosperity,and Sustainability through a Forwardlooking and People-Centred Vision.
文摘As part of events marking the 50th anniversary of diplomatic ties between China and Thailand,a forum themed“Our Golden Friendship:Joining Hands to Build a China-Thailand Community with a Shared Future”was held in Bangkok on January 17,aiming to deepen mutual trust and enhance exchange between Chinese and Thai media and think tanks.
文摘This year marks the 50th anniversary of the establishment of China-Thailand diplomatic relations and the“Golden Jubilee of China-Thailand Friendship.”Over the decades,fruitful results have been achieved in bilateral cooperation in fields such as politics,economics,security,and cultural exchange.So,what are the key factors contributing to the enduring friendship and the remarkable achievements in bilateral cooperation?And,how does strengthened comprehensive strategic partnership and joint construction of a more stable,prosperous,and sustainable China-Thailand community with a shared future benefit both countries,the region,and even the world?
基金supported by the National Natural Science Foundation of China(52077078)China Southern Power Grid Company Limited 036000KK52220004(GDKJXM20220147).
文摘To address the problem of high lifespan loss and poor state of charge(SOC)balance of electric vehicles(EVs)participating in grid peak shaving,an improved golden eagle optimizer(IGEO)algorithm for EV grouping control strategy is proposed for peak shaving sce-narios.First,considering the difference between peak and valley loads and the operating costs of EVs,a peak shaving model for EVs is constructed.Second,the design of IGEO has improved the global exploration and local development capabilities of the golden eagle optimizer(GEO)algorithm.Subsequently,IGEO is used to solve the peak shaving model and obtain the overall EV grid connected charging and discharging instructions.Next,using the k-means algorithm,EVs are dynamically divided into priority charging groups,backup groups,and priority discharging groups based on SOC differences.Finally,a dual layer power distribution scheme for EVs is designed.The upper layer determines the charging and discharging sequences and instructions for the three groups of EVs,whereas the lower layer allocates the charging and discharging instructions for each group to each EV.The proposed strategy was simulated and verified,and the results showed that the designed IGEO had faster optimization speed and higher optimization accuracy.The pro-posed EV grouping control strategy effectively reduces the peak-valley difference in the power grid,reduces the operational life loss of EVs,and maintains a better SOC balance for EVs.
文摘Molecular cloning remains a cornerstone technique in genetic engineering and synthetic biology.In this study,we conducted a systematic comparative analysis between the classical cloning method and the Golden Gate assembly technique,utilizing Escherichia coli as the model organism.Through polymerase chain reaction(PCR)amplification,restriction enzyme digestion,ligation,transformation,and Sanger sequencing,we assessed the operational efficiency and cloning fidelity of both strategies.Our results demonstrated that Golden Gate assembly,leveraging type IIS restriction enzymes and simultaneous ligation,significantly enhanced cloning efficiency and precision,particularly for seamless multi-fragment assembly.In contrast,the classical cloning approach maintained certain advantages in simplicity and robustness for specific experimental conditions.Challenges encountered during transformation and sequencing highlighted the critical impact of technical accuracy on experimental outcomes.This study underscores the importance of selecting appropriate cloning methodologies tailored to experimental objectives and laboratory capabilities,providing a foundation for optimized molecular cloning workflows in future synthetic biology and biotechnology applications.
基金Project of Heilongjiang University of Finance and Economics(XJYB2024056)Project of Heilongjiang University of Finance and Economics(XJYB2024057)。
文摘In this paper,the necessity of constructing a golden course for Advanced Mathematics is presented.For teachers,golden courses enhance their teaching ability and job satisfaction.For students,golden courses improve their sense of learning value and significance and encourage them to actively learn and participate deeply.Next,the relevant content of course ideological and political construction is provided.Finally,a specific approach was proposed to create a golden course for Advanced Mathematics by integrating ideological and political education into the curriculum.
文摘Reliable Cluster Head(CH)selectionbased routing protocols are necessary for increasing the packet transmission efficiency with optimal path discovery that never introduces degradation over the transmission reliability.In this paper,Hybrid Golden Jackal,and Improved Whale Optimization Algorithm(HGJIWOA)is proposed as an effective and optimal routing protocol that guarantees efficient routing of data packets in the established between the CHs and the movable sink.This HGJIWOA included the phases of Dynamic Lens-Imaging Learning Strategy and Novel Update Rules for determining the reliable route essential for data packets broadcasting attained through fitness measure estimation-based CH selection.The process of CH selection achieved using Golden Jackal Optimization Algorithm(GJOA)completely depends on the factors of maintainability,consistency,trust,delay,and energy.The adopted GJOA algorithm play a dominant role in determining the optimal path of routing depending on the parameter of reduced delay and minimal distance.It further utilized Improved Whale Optimisation Algorithm(IWOA)for forwarding the data from chosen CHs to the BS via optimized route depending on the parameters of energy and distance.It also included a reliable route maintenance process that aids in deciding the selected route through which data need to be transmitted or re-routed.The simulation outcomes of the proposed HGJIWOA mechanism with different sensor nodes confirmed an improved mean throughput of 18.21%,sustained residual energy of 19.64%with minimized end-to-end delay of 21.82%,better than the competitive CH selection approaches.
文摘A symmetrical quartic polynomial, named golden one, can be connected to coefficients of the icosahedron equation as well as to the gyromagnetic correction of the electron and to number 137. This number is not a mystic one, but is connected with the inverse of Sommerfeld’s fine-structure constant and this way again connected with the electron. From number-theoretical realities, including the reciprocity relation of the golden ratio as effective pre-calculator of nature’s creativeness, a proposed closeness to the icosahedron may point towards the structure of the electron, thought off as a single-strand compacted helically self-confined charged elemantary particle of less spherical but assumed blunted icosahedral shape generated from a high energy double-helix photon. We constructed a chiral Moebius “ball” from a 13 times 180˚twisted double helix strand, where the turning points of 12 generated slings were arranged towards the vertices of a regular icosahedron, belonging to the non-centrosymmetric rotation group I532. Mathematically put, we convert the helical motion of an energy quantum into a stationary motion on a Moebius stripe structure. The radius of the ball is about the Compton radius. This chiral closed circuit Moebius ball motion profile can be tentatively thought off as the dominant quantum vortex structure of the electron, and the model may be named CEWMB (Charged Electromagnetic Wave Moebius Ball). Also the gyromagnetic factor of the electron (g<sub>e</sub> = 2.002319) can be traced back to this special structure. However, nature’s energy infinity principle would suggest a superposition with additional less dominant (secondary) structures, governed also by the golden mean. A suggestion about the possible structure of delocalized hole carriers in the superconducting state is given.
文摘The golden apple snail Pomacea canaliculata （Lamarck 1819） was first recorded at Black Dragon Spring, Dianchi Basin, Baiyi Township, Songming County, Kunming City, Yunnan Province, China, in October 2004. The water from the spring flows into the Songhuaba Reservoir, the major drinking water resource for Kunming City, and part of the Dianchi Lake basin. This is the first record of this invasive snail in the Dianchi Lake Basin. Pomacea canaliculata originates from Central and South America, and in Asia the snail has spread through deliberate and accidental introductions to the Philippines, Vietnam, Thailand, Laos, Cambodia, Malaysia, Indonesia, Papua New Guinea, Korea, Japan and South China. It has become a major pest in rice-growing areas, resulting in huge damage to crops. Strict prevention and control measures have to be implemented to prevent the spread of the snail in Yunnan, together with public awareness campaigns to inform the public of the dangers of this invasive snail.
基金The project was sponsored by the Scientific Re-search Foundation for the Returned Overseas Chinese Scholars, State Education Ministry (1999-363).
文摘In July 2006, the diurnal activity rhythms of 13 heads of captive Qinling golden takin were observed in Shaanxi Provincial Centre for the Breeding and Conservation of Rare Wildlife （SPCBCRW） at daylight （from 9：00 am to 4：00 pm in July）. The behavioral ethnogram was identified through observation at the sampling site, with the behaviors of golden takin recorded at 5 min interval using instantaneous scannable sampling method. The results indicated that the resting of golden takin took an important part in the daylight activities. Meanwhile, drinking and urinating and defecating were 1.92 and 0.54 and 0.92 times per head per day. Ambient temperature had a strong effect on the diurnal activity rhythms of golden takin. The diurnal activity rhymes were affected by ages of the animals effectively, which was expressed through differentiation of the time budgets. Moreover, different individuals in the same population showed some non-synchronously activity rhythms.
基金Supported by the Special Project of Department of Science and Technology of Hebei Province(08820412D)the Special Project of Qinhuangdao Municipal Bureau of Science and Technology[Qinkeji(2003)30-35]+1 种基金the Special Project of Shijiazhuang Municipal Bureau of Science and Technology(07150193A)the Scientific Research Innovation Team Project of Hebei Normal University of Science and Technology(TD201201)~~
文摘[Objective] This study aimed to identify the in vitro antibacterial activity of golden buckwheat extract and investigate the therapeutic effect of its preparation on mycoplasma infection. [Method] Through measuring the minimum inhibitory concentra-tion, the in vitro antibacterial activity of golden buckwheat water extract was deter-mined; meanwhile, the therapeutic effect of golden buckwheat oral solution on my-coplasma infection was determined by artificial y infecting chickens with Mycoplasma gal isepticum culture. [Results] The golden buckwheat water extract had obvious in-hibitory effects against Pseudomonas aeruginosa and Escherichia coli, and a certain inhibitory effect on Salmonel a and Staphylococcus aureus; administration of golden buckwheat oral solution at the dose of 0.5%-1.0% continuously for 5 d had a good therapeutic effect against mycoplasma infection. [Conclusion] The study provides sci-entific bases for further study on the antibacterial activity of golden buckwheat and its application.
基金Supported by the Twelfth Five-year Plan"Integration and Demonstration of Key Technology of Raising Fish in Heilongjiang"(2012BAD25B10)~~
文摘In order to screen the effective preventive drugs for saprolegniasis occurred during hatching of the fertilized eggs of golden trout, effects of two kinds of self-made Chinese herbal compounds（AB） and two kinds of chemical bactericides（peroxyacetic acid andhydrogen peroxide, CD） with three disinfection concentrations were compared in this study. The fertilized eggs of golden trout were randomly divided into 13 groups, each group with two parallels of 1 000 eggs. Drugs at high,medium and low concentration were respectively used to immerse the fertilized eggs35 min for disinfection once a day. The numbers of live and dead eggs were recorded each day before disinfection and the numbers of survival eyed eggs were counted in each experimental group after finishing the whole test. The results indicated that all of four kinds of drugs used here had a certain effect on prevention and control of saprolegniasis during hatching of fertilized eggs of golden trout, and also showed a correlation between the concentrations and effects. After the selection of several drugs, we found that group B-medium, C-medium and D-high exhibited the most remarkable effects on control of saprolegniasis. However, careful consideration should be given to chemical drugs residues and their potential hazard to the eyed eggs. Therefore, Chinese herbal compound B was suggested to be used for prevention and control of saprolegniasis to achieve the healthy aquaculture. And the concentration and operation time of Chinese herbal compound B should be strictly controlled when used in disinfection of fertilized eggs.
