3132results about How to "Increase growth rate" patented technology

A method for producing a nitride semiconductor, comprising controlling temperature and pressure in a autoclave containing a seed having a hexagonal crystal structure, a nitrogen element-containing solvent, a raw material substance containing a metal element of Group 13 of the Periodic Table, and a mineralizer so as to put said solvent into a supercritical state and / or a subcritical state and thereby ammonothermally grow a nitride semiconductor crystal on the surface of said seed, wherein the crystal growth rate in the m-axis direction on said seed is 1.5 times or more the crystal growth rate in the c-axis direction on said seed. By the method, a nitride semiconductor having a large-diameter C plane or a nitride semiconductor thick in the m-axis direction can be efficiently and simply produced.

The invention relates to a compound feed for lactating sows and a preparation method thereof. The invention discloses an complete compound feed for the lactating sows, comprising the following components: corns, bean pulp, imported fish meal, fermented cottonseed meal, imported dried porcine solules, alfalfa meal, rice bran, wheat bran, oil, calcium hydrophosphate, mountain meal, edible salt, compound microbial ecological agents like yeast and the like, choline chloride, a food calling agent, an acidulant, an amino acid additive, compound vitamins, organic compound trace elements and an auxiliary functional packet. The feed fully completely meets the nutrition requirements for postpartum lactation and postweaning estrus of the sows and can ensure that the sows provide more milk with high quality during lactation so that suckling pigs grow at high speed and has good weaning weight and small weaning stress; and the sows have less postpartum diseases, timely rut for hybridization after weaning, the non-breeding days of the sows are shortened, and the annual live piglet number and the utilization age limit of the sows and the like are increased.

The present invention relates to an active peptide feed addictive, as a mixture of one or more plant protein and animal protein, which is the product of the following steps: fermenting and degrading the mixture through bacillus and the like, controlling the degree of hydrolysis at 20-35%, obtaining a fermentation supernatant after a separation post-processing process, concentrating drying the supernatant or directly adsorbing the supernatant onto the carrier, and then low temperature drying it. Said active peptide feed addictive is capable of obviously depressing development of bacillus coli and salmonella, and can prevention and cure diarrhea caused by bacilli or lienteric diarrhea; can exert its functions at a very low concentration, with a very intense effect; can regulate stomach and intestine bacterium group and promote animals digestion functions; can excite animal immune function, reinforce animal disease resistance against a plurality of epidemic diseases and greatly reduce the morbidity and death rate; can promote animal development and improve the growth velocity; can improve the feed use ratio and reduce production costs. Applications of the microorganism fermentation degradation method provided by the present invention have a low fabricating cost, and the obtained peptides have many kinds and high content, without environment pollutions.

The invention relates to a water circulation system and a method for breeding marine fishes inland, and mainly solves the technical problems of complex process, large investment, high operating cost, large limitation of breeding varieties, low survival rate, slow growth and the like in the process of breeding the marine fishes in fresh water or low salinity salt water at present. A technical scheme comprises the following steps of: a, establishing the water circulation system; b, performing domestication on juvenile fishes of the marine fishes in the low salinity salt water in a gradient mode, namely breeding the juvenile fishes which are bred in the seawater in the brackish water temporarily, formulating a domestication strategy of slowing salinity gradually, and performing domesticationon the juvenile fishes of the marine fishes through three gradients, namely the brackish water phase, the low salinity phase and the ultra-low salinity phase; c, adding a physiological salt preparation, namely adding metal ions which play a key role in osmoregulation into the water or a feed; and d, managing the breeding, namely providing a preference temperature, illumination intensity and a daily illumination period. The water circulation system and the method are mainly used for breeding the marine fishes inland.

The invention discloses an explicit congestion control method based on bandwidth estimation in a high-bandwidth delay network, which comprises the following steps of: calculating the current available bandwidth of a network by a TCP (Transmission Control Protocol) sender through observing an ACK (Acknowledgement Character) receiving interval, loading a router by a packet header ECN (Explicit Congestion Notification) 2bits information feedback network, carrying out network state judgment by the sender through explicit feedback information and estimated available bandwidth values, and adjusting a congestion mechanism according to a judgment result. The congestion is judged by combining end-to-end feedback and router explicit feedback, i.e. finer congestion information is given by using the bandwidth estimation values based on the explicit feedback of coarseness, thus an algorithm ensures high congestion feedback precision while reducing the explicit feedback overhead and improving the protocol popularization, and improves the efficiency and the convergence rate of the protocol.

The invention relates to a production method of a low cholesterol nondrug residue egg. The method is characterized in that the chicken is fed in cages in brooding period. The chicken is scattered and fed on the hilly country exposed to the sun and ventilated in finishing and egg production periods. The Chinese traditional medicine additives should be added at different growth phase of chicken. The invention can promote the viscera growth of chicken, and improve health condition of chicken without using medical medicine and hormone. The method can greatly reduce the content of the cholesterol in the egg, which is good for health.

The invention relates to a camellia oleifera Abel planting method and belongs to the technical field of plant planting. The method comprises the following steps: cutting, cutting management, seedling hardening, management before transplanting, field transplanting and field management. According to the camellia oleifera Abel planting method, through a reasonable cutting management method and camellia oleifera seedling fertilization and topdressing management, the survival rate and growth rate of the cutting seedlings are greatly improved; meanwhile, the camellia oleifera Abel can bear fruits after three years, and enter a full bearing period after five to six years; fruit-bearing rate is high; and oil extraction rate of the fruits is high.

The invention discloses a method for remedying heavy metal polluted mining soil, which includes: using fish-scale pits to prepare the land; separately stacking the soil of different stratums in excavation; separating the surface soil and the undersoil; allowing unpolluted soil to stand by; filling the finished tree pits with the surface soil obtained in excavating the tree pits; well mixing the tree pit filling with the unpolluted soil excavated on the spot or borrowed soil, and filling the mixture into the tree pits; and finally filling with the undersoil or borrowed soil. On the basis of the prior art, ingredients of the filling are changed, so that planted plants are easy to survive and can successfully live through the transitional period, and the basis for remediation later is laid.

The invention discloses feed for 22 to 42-day meat ducks, which comprises a feed carrier and a feed additive, wherein the feed carrier comprises one or more of bran, table salt, corn slag, fish meal, stone powder, rice bran, bean pulp and beef tallow; the feed additive comprises an enzyme composition and a traditional Chinese medicinal additive. The enzyme composition further comprises: xylanase, beta-glucanase, beta-mannase, cellulose, amylase, phytase and protease. The traditional Chinese medicinal additive further comprises: wild buckwheat rhizome, common cnidium fruit, dried orange peel, turmeric, suberect spatholobus stem, selfheal, scutellaria baicalensis, folium isatidis, codonopsis pilosula, Chinese angelica, medical stone, curcuma zedoary, charred triplet, sculellaria barbata, drynaria rhizome and fructus forsythiae. The feed can improve the meat quality of duck body, survival rate and crop. The additive contains rich amino acid, mineral substances, vitamins and other nutritive materials and therefore helps to supply amino acid, mineral substances and vitamins to grains and improve the utilization rate of feed.

The invention provides a grouper environmentally-friendly soft granulated feed and a preparation method thereof. The grouper environmentally-friendly soft granulated feed comprises the following nutritional components in percentage by weight: 40 to 50 percent of crude protein, 6 to 12 percent of crude fat, 8 to 15 percent of crude ash, 22 to 28 percent of carbohydrate, and 6 to 10 percent of moisture. According to the invention, the high-quality grouper environmentally-friendly soft granulated feed is studied, popularized and applied, so that the nutrition of the launched feed goes to be complete and balanced, and the palatability of the feed is good, not only can the feed digestive absorption rate of grouper be improved, but also the survival rate and growing speed of the grouper are improved, and the fish quality is improved. Therefore, non-polluted fish products are produced, and the cultivation economical benefit is improved; and the feed has active and profound significance in reducing the usage of small trash fish, lightening the sea area pollution, protecting the marine eco-environment, and promoting the sustained stable and health development of the marine fish culture industry.

The invention discloses an LED epitaxial wafer grown on an Si substrate and a preparation method thereof. The LED epitaxial wafer grown on the Si substrate is prepared through the following preparation method: using the Si substrate, enabling the surface (111) of the Si substrate to deviate from (100) by 0.5 to 1 degree, growing a first AlN buffer layer, and growing a second AlN buffer layer, an AlGaN step buffer layer, a u-GaN layer, an n-GaN layer, an InGaN / GaN quantum well layer and a p-GaN layer in sequence. The LED epitaxial wafer grown on the Si substrate uses Si as the substrate, the preparation method combines a metal organic chemical vapor deposition technique and a pulsed laser deposition technique, a procedure of pre-paving Al for using the metal organic chemical vapor deposition technique to grow the AlN is omitted, the problem that Si is diffused to the AlN buffer layer under a high temperature to damage the surface shape is avoided, and the LED epitaxial wafer is good in performance, high in crystal quality and suitable for LED devices.

The invention discloses a health-care compound feed for prawns and a production method thereof. The invention aims to provide a health-care compound feed for prawns, which can improve immunity in the prawns, utilization rate of feed and water quality, and a production method thereof. The formula of the raw material comprises the following components in part by weigh: 1 to 6 parts of imported white fish meal, 20 to 25 parts of steamed fish meal imported from Taiwan, 2 to 8 parts of steamed fish meal made in China, 18 to 22 parts of high-gluten wheat flour, 15 to 22 parts of peeled soybean pulp, 8 to 15 parts of peanut cakes, 2 to 6 parts of defatted shrimp meal, 1 to 3 parts of beer yeast cream, 1 to 3 parts of soyabean lecithin oil, 0.5 to 2 parts of refined fish oil, 0.5 to 2 parts of monocalcium phosphate and 1 to 4 parts of additive premix. The production method comprises: crushing, primary material mixing, secondary material mixing, hardening and tempering, granulating, braising, aging, drying, cooking, sieving and packaging. The invention can improve the breeding yield of pawns, reduce discharge pollution, improve water environment and the like.

The invention belongs to the fields of microbe application technologies and food biotechnologies, and discloses a strain used for fermenting rice bran and wheat bran extracts for producing grifolan. The grifola frondosa strain is collected in China Center for Type Culture Collection (CCTCC) in Wuhan University in Wuhan, China on Aprial 7th, 2011, and has a strain collection number of CCTCC No: M2011113. The name of the strain is Grifolasp. JSU10-2. According to the invention, through protoplast laser mutation, the strain with high yield of mycelium polysaccharide produced from cheap raw materials is obtained. When the strain and an original strain are respectively used in liquid fermentation of a rice bran and wheat bran composite culture medium, the dry weight and polysaccharide of the mutant strain are respectively increased by 31.7% and 32.6% compared with those of the original strain.

The invention relates to a method for preparing high trace element eggs, which is characterized in that a chinese herbal medicine composition is added into an usual chicken feed. The proportioning by weight of each component of the chinese herbal medicine composition is that astragalus are 9-12 parts, dodder is 9-12 parts, angelica is 6-9 parts, wolfberry fruitis 6.9 parts, and fleece-flower root is 6-9 parts. Three kinds of agents which are powder or agent or dry paste are capable of being made. The content of trace elements of the produced eggs is greatly improved, simultaneously, the performance of the eggs are further improved, and the body immunity is increased. The invention has the advantages of simple operation, no toxicity, and low cost and the like.

The invention discloses giant salamander compound bait and a production method thereof. The giant salamander compound bait includes bait for young salamanders and adult salamanders and bait for parent salamanders. The salamander compound bait takes fresh crucian carps, carps, grass carps, loaches and bull frogs as main materials and takes aggregates, mineral powder, micro amino acid and the like as auxiliary materials. After the main materials are mixed and minced, the auxiliary materials are added, and starch is then mixed. After being stirred and rubbed, the materials are filled by plastic casings in a sausage stuffer and dotted. Finally, sausages are sterilized at a temperature of 95-100 DEG C. The giant salamander compound bait can replace fresh fish and shrimp bait to feed giant salamanders. When the giant salamander compound bait is used for feeding, the plastic casings are stripped off, and the giant salamander compound bait is cut into strip materials suitable for the giant salamanders to swallow and thrown into a salamander pond. The giant salamander compound bait has good palatability. Practices prove that when the bait is used for feeding the giant salamanders, the breeding cost of the giant salamanders can be reduced by 30-50%, the growth rate of commercial salamanders can be increased by 10-30%, the salamander reproduction rate can be increased by 50-100%, and thedisease incidence rate of the giant salamanders is obviously reduced.

The invention provides a method of para position allocation and ,mixing cultivation of planting grass for afforestation on purple hills, which comprises the steps of: (1) division of land types: purple hilly lands are divided according to the acidity, basicity and lithology of the lands, soil erosion, soil thickness and terrain features; (2) selection of species of trees and grasses: species of trees and grasses which are applicable to grow in varied purple lands are selected according to the selection experiments of the different types of species of trees and grasses used for afforesting of purple hilly lands, and fitting degrees of the species of trees and grasses to each kind of land are specified; (3) para position allocation of the species of trees and grasses with the kinds of the lands: corresponding species of trees and grasses are allocated on the most suitable or relatively suitable lands; (4) mixed disposition of trees: different optimized disposition modes for purple hilly mixed forests are selected according to the mixed experiments of the trees for different kinds of lands of hills and hilly areas with purple soil, and trees and bushes, legumes and non-legumes, species of trees of deep root system and shallow root system, horizontally growing type and vertically growing type, soil fixing type and soil improved type are mixed. The method of the invention adopts trees, brushes and grasses to be planted on the most suitable and relatively suitable hills with purple soil, thus realizing precise para position allocation, high survival rate being up to over 90 percent and greatly accelerating the growing speed and forest establishment speed.

The invention discloses a coastal kaline soil forestation method, comprising the following steps: A. trenching and building ridges, and building rain collection beds; B. setting rain collection surfaces; C. digging plant pits, and setting salt isolation layers; D. collecting tree species and planting; E. setting surface cover layers of plant pits; F. tending, and weeding at proper time; wherein, the step of trenching and building ridges, and building rain collection beds is based on the design of forestation spacing, and flow collection trenches are dug at interval of a row spacing along the direction of rows; the depth of the trench bottom is 20cm to 25cm; the ground surface between the ridge and the trench bottom is trimmed to form a shallow v-shaped groove; the sloping surfaces are leveled and compacted to form the rain collection beds. The coastal moderate kaline soil forestation technology of the invention greatly increases the water content of soil, and the salt is efficiently leached and reduced, thereby efficiently improving the survival rate, save rate and growing speed of forests; the survival rate of forests reaches greater than 85%.

The invention discloses a nitrite bacteria growth promoter including the components: 40-100 parts by weight, preferably 50-80 parts by weight, of metal salts; 5-30 parts by weight, preferably 10-20 parts by weight, of an amine substance; 0.05-1.5 parts by weight, preferably 0.1-1.0 part by weight, of organic acid hydroxylamine; and 10-40 parts by weight, preferably 20-30 parts by weight, of Na2SO3; the metal salts comprise a calcium salt, a magnesium salt, a ferrous salt and a copper salt, and the molar ratio of Ca<2+> to Mg<2+> to Fe<2+> to Cu<2+> is (5-15) to (5-25) to (1-8) to (0.5-5), preferably (8-12) to (10-20) to (2-6) to (1-4). The promoter has the advantages of simple formula and easy preparation, can be used in the cultivation process of nitrite bacteria, can also be directly added into a sewage treatment system, accelerates starting of short-cut nitrification-denitrification and short-cut nitrification-anaerobic ammonium oxidation processes and achieves stable operation.

The invention discloses a preparation method and application of an antibacterial bio-ceramic film with the titanium or titanium alloy surface containing copper and belongs to the technical field of treating metal surfaces. The preparation method comprises the following steps: preparing a Ca, P and Cu containing porous hard ceramic layer under a single square wave pulsed power supply mode; and carrying out hydrothermal treatment or alkali treatment to obtain the CuO / HA antibacterial bio-ceramic film. According to the preparation method disclosed by the invention, the prepared ceramic layer and a matrix are in metallurgical bonding and are good in bioactivity and obvious in antibacterial effect; the prepared antibacterial bio-ceramic film is suitable for dental implant in the field of oral cavities as well as bone union plates, bone nails and the like of orthopaedics; and the ceramic layer is good in protein adsorbability and adhesion, increment and differentiation abilities of cells and is capable of greatly shortening the bonding time of the traditional medical implanting material and bones.

The invention discloses a nitrite bacterium culture promoter, which consists of metal salts, polyamine substances, organic acid hydroxylamine and Na2SO3, wherein in parts by weight, the content of the metal salts is 40-100 parts by weight, preferably 50-80 parts by weight; the content of the polyamine substances is 5-30 parts by weight, preferably 10-20 parts by weight; the content of the organic acid hydroxylamine is 0.05-1.5 parts by weight, preferably 0.1-1.0 part by weight; and the content of the Na2SO3 is 10-40 parts by weight, preferably 20-30 parts by weight; the metal salts include calcium salt, ferrous salt and copper salt; and the molar ratio of Ca<2+> to Fe<2+> to Cu<2+> is (5-15) to (1-8) to (0.5-5), and preferably (8-12) to (2-6) to (1-4). The promoter is simple in formula and easy for preparing; and the promoter can be applied to the culture process of the nitrite bacteria and the promoter can be also directly added to a sewage treatment system, so that the starting of partial nitrification-denitrification and partial nitrification-anaerobic ammonia oxidation processes is accelerated and the stable running of the processes is achieved.

The invention provides a scenedesmus obliquus with high tolerance to high pH and a breeding method thereof. By ultraviolet mutagenesis and a step-by-step pH-increasing acclimation and screening method, scenedesmus obliquus undergoes breeding so as to obtain scenedesmus obliquus with high tolerance to high pH. The scenedesmus obliquus is named FSH-Y2 and was preserved in the China General Microbiological Culture Collection Center on September 11th, 2012, with the preservation number of CGMCC No. 6551. The selected scenedesmus obliquus can better absorb and utilize carbon dioxide at high pH value to rapidly grow and propagate. Thus, the problem that existing scenedesmus obliquus only can growth at neutral pH and carbon dioxide solubility and carbon dioxide fixation efficiency are low under the condition of neutral pH is solved.

The present invention discloses a high nutrition health chicken feed and a preparation method thereof. Raw materials comprise 30-40 parts of corn flour, 15-25 parts of soybean meal powder, 12-13 parts of dry maggot powder, 9-12 parts of fish meal, 4-6 parts of bone meal, 4-5 parts of brewer's yeast powder, 3-4 parts of seaweed powder, 3-5 parts of shrimp shell, 2-4 parts of sunflower leaves, 3-5 parts of dehydrated carrot, 1-2 parts of dehydrated marigold, 0.2-0.3 part of gravy salt, and a proper amount of an additive and a phagostimulant. The health chicken fed with the high nutrition health chicken feed has characteristics of strong immunity, fast production, high feed conversion rate, robust shape, bright color feathers, fresh meat, and no raw meat odor.

The invention relates to a larva breeding device. The larva breeding device comprises a support frame, a larva breeding container and a feeding mechanism, wherein the support frame comprises at least one layer of support frame body and a bottom support from top to bottom, the larva breeding container is arranged at the upper end of each support frame body and can rotate along the support frame body, inside of the larva breeding container is divided by at least two partitions, and an unloading hole is formed in the bottom end of the larva breeding container along one partition; the feeding mechanism comprises a stirred material temporary storage hopper and subarea pipes, the bottom end of the stirred material temporary storage hopper is arranged on the bottom support, the subarea pipes are arranged on a discharge pipe of the stirred material temporary storage hopper from top to bottom and arranged above the larva breeding container, the subarea pipes above the same larva breeding container are distributed circumferentially on the outer surface of the discharge pipe of the stirred material temporary storage hopper, and discharge holes are uniformly formed below the subarea pipes. With adoption of the structure, a large amount of labor cost is saved, and the production efficiency is increased.

The invention discloses a matrix for breeding earthworms. The matrix is prepared from, by weight, 60-80 parts of pig manure, 15-20 parts of Chinese medicine residues, 30-50 parts of plant straw, 20-30 parts of fruit residues, 10-15 parts of river bottom sludge, 0.5-1 part of EM liquid and 100-150 parts of sandy loam. According to the matrix, waste is reused, the environment is protected, the substance utilization rate is increased based on the fermentation technology, rich nutritional ingredients are contained, good air permeability is achieved, the growing environment of the earthworms is improved, morbidity and mortality are lowered, and the growth rate and yield are increased. In addition, the problem that the earthworms are hard to breed in partial areas is solved, so that earthworm breeding is normalized and standardized, and the development of the earthworm breeding industry is promoted.

The invention discloses a nitrifying bacterium culture promoter, which consists of metal salts, polyamine substances and organic acid hydroxylamine, wherein in parts by weight, the content of the metal salts is 40-100 parts by weight, preferably 50-80 parts by weight; the content of the polyamine substances is 5-30 parts by weight, preferably 10-20 parts by weight; and the content of the organic acid hydroxylamine is 0.5-15 parts by weight, preferably 2-10 part by weight; the metal salts include calcium salt, magnesium salt, ferrous salt and copper salt; and the molar ratio of Ca<2+> to Mg<2+> to Fe<2+> to Cu<2+> is (5-15) to (5-25) to (1-8) to (0.5-5), and preferably (8-12) to (10-20) to (2-6) to (1-4). The promoter is simple in formula and easy for preparing; and the promoter can be applied to the culture process of the nitrifying bacteria and the promoter can be also directly added to a sewage treatment system, so that the rapid growth and reproduction of nitrifying bacteria can be achieved within a short time; and the cultured nitrifying bacteria are high in activity and strong in impact resistance.

The invention provides a method for cultivating a novel Dingyuan pig breed, which relates to a method for cultivating a novel pig breed. The invention provides the method for cultivating the novel Dingyuan pig breed which has the advantages high fecundity, good meat quality and strong stress resistance of Dingyuan pigs as well as the characteristics of fast growth, high lean meat percentage and the like of imported pigs. The method comprises the following steps: a Dingyuan sow is hybridized with a novel USA strain Duroc boar to cultivate a first generation sow core group; second grading hybridization is performed to the first generation sow core group and a Dingyuan boar or the novel USA strain Duroc boar; from the third generation, group closure propagation and breeding are adopted respectively, and crossing of two to three generations is performed; and selection and remaining are performed through methods of comprehensive selection indexes and molecule marking assistance selection to form the novel Dingyuan pig breed, namely a novel breed of Wan Huai pigs and a novel breed of Dingyuan-Duroc pigs.

The invention relates to a method for culturing microalgae, which is characterized by comprising the following steps of: (1) fermenting to produce acid, enabling the supernatant which is acid liquor obtained after fermentation to flow to a culture device, and collecting the produced gas mixture in a gas storage tank; (2) inoculating the cultured microalgae to the acid liquor contained in the culture device for heterotrophic culture; and (3) circularly introducing the gas mixture in the gas storage tank to a photobioreactor for aerobic autotrophic culture. In the invention, the acid production stage through methane fermentation and the microalgae culturing process are coupled, and heterotrophy and autotrophy are combined; thus, oil-rich microalgae with high biomass is cultured, and meanwhile, a hydrogen-rich gas with high concentration can be obtained. The method is mainly used for culturing the oil-rich microalgae.

The invention relates to a special feed for culturing blood-sucking leech larvae and belongs to the technical field of preparation of a leech larva culturing feed. The special feed for culturing the blood-sucking leech larvae is prepared from the raw materials of plasma protein powder, composite vitamin powder, vitamin C, composite mineral substances, a Lido enzyme, tri-yellow powder and the like. According to the invention, Chinese herbal medicine tri-yellow powder is adopted to replace common antibiotics in the conventional cultivation, so that the drug residue of blood-sucking leeches is eliminated and the quality of a leech medicinal material is improved. The feed has low preparation cost, high biological safety coefficient and is easy to digest and adsorb by the leech larvae; symptoms such as indigestion caused by feeding of a conventional feed, hematemesis, physical disfigurement or swelling caused by bacteria infection and the like are avoided; the special feed is very beneficial to industrial large-scale reproduction and cultivation of the leeches; and the gap that in China, no special feed for cultivating the leech larvae is filled. By the practical test of continuously feeding for five years, the growth rate and the survival rate of the leech larvae are greatly improved, the leech yield is high, no pesticide is left and the prepared leech medicinal material has high quality.

The invention relates to economic active powder concrete mixed superfine cement and belongs to the technical field of concrete. The economic active powder concrete comprises the following raw material ingredients including concrete, blending materials, sand, water and water reducing agents, wherein the proportioning rate of the total weight of the concrete and the blending materials, the sand, the water and the water reducing agents is 1:(0.7-1.5):(0.14-0.2):(0.01-0.05) through being calculated by weight, the concrete is formed by blending normal concrete and superfine cement, the superfine cement is prepared by using normal cement or cement clinker as raw materials through being ground to the specified fineness, the specific surface area of the superfine cement is not lower than 500m<2> / kg, the specific surface area of the normal cement is smaller than 500m<2> / kg, and the mass content of the normal cement in the cement is not greater than 95 percent. The economic active powder concrete mixed superfine cement has the advantages that the intensity increment speed of the active powder concrete can be accelerated, and the active powder concrete can get rid of the dependence on silica powder.

A gate electrode is formed over a partial surface area of a semiconductor substrate, with a gate insulating film being interposed therebetween. A first semiconductor film is formed over the semiconductor substrate on both sides of the gate electrode, the first semiconductor film being spaced apart from the gate electrode. An impurity diffusion region is formed in each of the first semiconductor films. An extension region is formed in the surface layer of the semiconductor substrate on both sides of the gate electrode. The extension region is doped with impurities of the same conductivity type as the impurity diffusion region and being connected to a corresponding one of the impurity diffusion regions. Sidewall spacers are formed on the sidewalls of the gate electrode, the sidewall spacers extending beyond edges of the first semiconductor films on the gate electrode side and covering partial surfaces of the first semiconductor films.