30 results about "Water retention" patented technology

The present invention relates to an absorber including a first water absorption layer, and a second water absorption layer laminated on the first water absorption layer, in which the first water absorption layer contains water-absorbent resin particles (I) having a water retention capacity of physiological saline of 32 to 80 g / g and a one-minute value of a lockup height of 1.6 cm or less, and the second water absorption layer contains water-absorbent resin particles (II) having a one-minute value of a lockup height of more than 1.6 cm.

The invention provides transparent conductive hydrogel with water response shrinkage, repairability and biocompatibility as well as a preparation method and application of the transparent conductive hydrogel. The conductive hydrogel is formed by taking a dual network formed by polyethylene glycol (PEG)-alpha-cyclodextrin (alpha-CD) and polyethylene oxide (PEO) as a basis and taking polyvinyl alcohol (PVA) as a skeleton as an auxiliary material. Wherein water, as mild stimulation, can destroy directional arrangement of a crystal domain and a molecular chain in PEO so as to trigger efficient contraction, and excellent mechanical repeatability is ensured by combination between alpha-CD and PVA. In addition, the ionic liquid is added, so that the conductive strain sensing requirement is met. By adding glycerol, the gel is endowed with good water-retaining property, and the loss of water is reduced, so that the structural stability and flexibility are maintained. Meanwhile, the glycerin-water binary solvent researched and developed by the research can effectively repair dehydrated gel after long-term use, so that the performance of the gel can be completely recovered. The hydrogel can be used as a dressing for wound healing to promote wound healing. The hydrogel can tightly wrap the surfaces of soft epidermal skin, heart, tendon and other visceral organs in a conformal shape self-adaptive mode, and is used for monitoring physiological signals and motion signals, and meanwhile, the health condition of covered tissues can be visually observed.

The invention discloses a medicinal composition for strengthening body resistance and nourishing liver as well as a preparation method and application thereof. The preparation method of the composition comprises the following steps: weighing the 15 medicinal materials according to the formula amount, crushing the turtle shell, decocting for about half an hour, then adding the rest medicinal materials, decocting, filtering, and concentrating the water decoction to 1 / 3-1 / 5 of the water addition amount, thereby obtaining the traditional Chinese medicine composition. The healthy-energy-strengthening and liver-nourishing soup has the effects of inducing diuresis, nourishing the liver, relieving ascites due to cirrhosis and the like, can relieve the symptoms of patients suffering from cirrhosis due to deficiency of healthy energy, blood stasis and qi stagnation and water retention, and can be used for treating cirrhosis diseases. The prepared decoction is fast in oral administration absorption and fast in drug effect exertion. And the product has high safety and no adverse reaction.

The application discloses a hemodialysis sufficiency evaluation method based on sodium balance, and relates to the technical field of hemodialysis, and the method comprises the following steps: obtaining the body weight, dry body weight and serum sodium concentration of a patient before dialysis; calculating a target sodium removal amount Na_target=DeltaW* [Na]s / 0.93, and establishing a quantitative equivalent relationship between the body weight increase and sodium accumulation; obtaining or calculating an actual sodium removal amount (including two ways of convection and diffusion); calculating a sodium removal ratio R_Na=Na_actual / Na_target; and evaluating the dialysis sufficiency according to the R_Na. The application firstly changes the dialysis sufficiency evaluation from 'urea removal' to'sodium and water removal', and directly aims at the main pathological burden of kidney failure patients, i.e. sodium and water retention. The sodium removal ratio R_Na is more directly related to the volume state and cardiovascular prognosis of the patient than the traditional Kt / V index. The method only needs the body weight and serum sodium before and after dialysis to be calculated, and can be integrated into the existing dialysis information system.

The invention discloses a feed additive and compound feed for improving the muscle quality of litopenaeus vannamei, and belongs to the technical field of aquatic feed. The feed additive comprises the following air-dried substance components in percentage by weight: 1%-30% of procyanidine, 1%-30% of levodopa and 40%-98% of broad bean powder, the compound feed comprises the feed additive and a main feed composed of fish meal, chicken meal, soybean meal, soybean protein concentrate, peanut meal, wheat middling, squid paste, fish oil, soybean lecithin, vitamin premix, mineral premix and the like. According to the litopenaeus vannamei compound feed, the synthesis of muscle collagen is promoted through the procyanidine, the muscle hardness, chewiness and shearing force are improved, meanwhile, the content of free amino acid is increased through the levodopa, the wind taste of the muscle is improved, and the antioxidant capacity and the water retention capacity of the muscle are improved, so that the muscle quality of the litopenaeus vannamei is improved.

The application discloses a cutting device for Phyllostachys nidularis, and relates to the technical field of Phyllostachys nidularis cultivation.The device comprises a rack, a soil aggregate transformation mechanism, a cutting mechanism and a controller.The soil aggregate transformation mechanism comprises a flat ring which is driven to move up and down by a first driving mechanism, and a rotating plate which is vertically arranged under the flat ring and is driven to rotate by a second driving mechanism.The rotating plate is inserted into soil and rotated, and the second driving mechanism drives the rotating plate to extrude the soil in the vertical projection of the flat ring towards the inner side of the flat ring.The cutting mechanism is driven to move in an inclined direction with the front being lower and the rear being higher.The controller is electrically connected with the first driving mechanism, the second driving mechanism and the cutting mechanism.The device can improve the water retention of soil, does not affect the drainage, and keeps the cutting hole depth consistent.

To provide a water-soluble sheet capable of preventing the spread of bacteria and viruses by a simple method, during water washing after use of a flush toilet.SOLUTION: A water-soluble sheet 100, which covers a lavatory pan T1 so as to prevent miscellaneous bacteria and the like from spreading in a space during water washing, comprises: a central part 1 large enough to be capable of covering a sealing water part T2 of the lavatory pan T1; a water-retentive inner edge part 2 that is arranged on the outer periphery of the central part 1; and a water-retentive adhesion part 3 that is arranged on the outer periphery of the inner edge part 2.SELECTED DRAWING: Figure 1

The application discloses a traditional Chinese medicine composition for treating chronic heart failure, which is made from the following raw materials: Huangqi, Hei Shunpian, Dangshen, Lujiao, Dangui, Chishao, Tinglizi, Chao Baishu, Zexie, Zhishi, Fuling, Honghua and Guizhi. The traditional Chinese medicine composition has the functions of benefiting qi and warming yang, removing blood stasis and promoting water excretion, and is used as a ministerial medicinal. Zexie can promote water excretion, remove dampness, discharge heat and transform turbid and reduce fat; Zhishi can break qi, eliminate accumulation, transform phlegm, open chest and qi, and relax qi stagnation and blood stasis; the two medicines can regulate qi and blood, dredge lung qi, and disperse phlegm, water retention and accumulation, so as to achieve the effect of heart-lung coordination; Fuling can promote water excretion, remove dampness, strengthen the spleen and calm the heart, so as to enhance the effect of Huangqi on strengthening the spleen and promoting water excretion. Honghua can activate blood, dredge channels, disperse blood stasis and relieve pain; Guizhi can warm and dredge channels, assist yang and qi, and balance and descend, so as to assist Hei Shunpian in warming and tonifying kidney yang, dredging yang and qi; at the same time, the traditional Chinese medicine composition can enter the heart meridian. The traditional Chinese medicine composition has the functions of benefiting qi and warming yang, removing blood stasis and promoting water excretion.

The utility model discloses a Chinese herbal medicine planting water conservation fertilization device, including drip irrigation tape body still includes drop -fertilizing mechanism, drop -fertilizing mechanism includes base plastic piece, bend cut muscle piece, spin -on pipe, spin -connected pipe, hollow spin column, four -hole core sac and side handle head, the inner tape surface of drip irrigation tape body is bonded with base plastic piece, set up drop -fertilizing mechanism at the drip irrigation tape body, and the bend cut muscle piece of drop -fertilizing mechanism and the water passage caliber of spin -on pipe, spin -connected pipe and other components constitute are bigger, can effectively reduce the risk of impurity stagnation, and the porous leakage structure of four -hole core sac is the key position of drip irrigation, but its installation on the design of hollow spin column makes liquid flow path more smooth, and the stable soil -removing water -out environment formed when the taper head of cooperation conical cylinder inserts the soil, effectively reduced the drip irrigation tape blockage probability when Chinese herbal medicine planting water conservation fertilization, and drop -fertilizing mechanism adopts modularization detachable design, and cleaning operation is convenient and efficient.

Pond (1) for water retention in the landscape, wherein the pond (1) comprises a water reservoir (2) and an earth embankment (3) for water retention, wherein the earth embankment (3) surrounds the water reservoir (2) over at least one quarter of the circumference of the water reservoir (2), wherein the water reservoir (2) comprises a bottom (7) of the water reservoir (2), characterized in that the pond (1) further comprises an underground clay layer (4) for limiting the escape of water from the water reservoir (2) by underground seepage, wherein the underground clay layer (4) is arranged under at least a part of the earth embankment (3), wherein at least a part of the earth embankment (3) is in contact with the underground clay layer (4).

The invention belongs to the technical field of food processing, and discloses a use method of a phosphorus-free water-retaining agent suitable for silver carp and bighead carp heads. The method comprises the following steps: selectively depolymerizing a mucus layer on the skin of a fish head by using alkaline protease, trehalose and a sodium citrate pretreatment solution through a mucus layer nanopore channel induction-low-temperature vacuum tumbling synergistic permeation process to form 50-200nm through micropores; and then combining vacuum rolling and kneading at 4 DEG C to drive non-phosphorus water retention components such as sodium carboxymethyl cellulose and L-arginine to uniformly permeate into muscular tissues at a depth of more than 8mm. According to the method disclosed by the invention, a set of complete, controllable and efficient phosphorus-free water retention technical system is constructed through cooperative regulation and control of interface microstructure engineering and mass transfer kinetics, so that not only is the problem of core quality deterioration in deep processing of silver carp and bighead carp heads solved, but also a transferable technical normal form is provided for phosphorus-free preservation of other high-mucus covering type aquatic products.

This utility model relates to the technical field of shower head (overhead spray) drainage, and in particular to a device for quickly draining residual water, comprising a main body having an inlet chamber and an outlet chamber, an inner body, a sealing element, and a return spring. The sealing element includes a plug, a first sealing part, and a second sealing part, used to close the inlet channel and connect the drain chamber to the atmosphere, respectively. When the water is turned off, the return spring drives the sealing element to return to its original position, opening the drain chamber and the air inlet chamber to quickly drain residual water; when the water is turned on, the water flow pushes the sealing element to close the drain chamber and the air inlet chamber, opening the inlet channel. This device ensures stable movement of the sealing element through guide strips, buckles, and other structures, and utilizes raised features to accelerate the water shut-off time. This utility model can effectively reduce residual water retention in the cavity, reduce the risk of bacterial growth, and requires no electricity, has a simple structure and low cost, significantly improving user experience and safety.

The traditional Chinese medicine composition is prepared from the following components in parts by weight: 6 to 12 parts of herba epimedii, 10 to 30 parts of radix astragali seu hedysari, 6 to 12 parts of herba cistanche, 4 to 8 parts of radix bupleuri, 6 to 12 parts of ramulus cinnamomi, 10 to 30 parts of caulis spatholobi, 10 to 15 parts of radix paeoniae alba, 6 to 12 parts of semen trigonellae and 10 to 40 parts of corn stigma. According to the traditional Chinese medicine composition disclosed by the invention, all the medicines are combined to achieve the effects of warming yang, tonifying qi, promoting blood circulation, inducing diuresis, warming and tonifying kidney yang in lower jiao and stirring qi in triple jiao.

The invention discloses a special dressing for shoulder arthroscopy operation based on chitin sponge and a preparation method thereof, and belongs to the technical field of high polymer materials and medical instruments. The preparation method of the dressing comprises the following steps: 1) mixing an alkali / urea mixed solution with a chitin raw material, and carrying out freezing-unfreezing treatment to break intermolecular hydrogen bonds of chitin so as to prepare a uniformly dispersed chitin solution; 2) adding a cross-linking agent into the chitin solution to obtain a second mixed solution; (3) pouring the second mixed solution into a customized mold matched with a shoulder joint anatomical curved surface, and carrying out a constant-temperature cross-linking reaction to prepare chitin hydrogel; 4) cleaning residual reagents of the chitin hydrogel with deionized water, and performing vacuum freeze drying to obtain a chitin sponge with a porous structure; 5, the chitin sponge serves as a contact layer of the dressing, a liquid absorption layer and an outer layer of the dressing are compounded with spun-bonded non-woven fabric, elastic reinforcing adhesive tapes are arranged on the front side and the rear side of the dressing respectively, and the complete dressing is obtained.The dressing has the high blood absorption rate, the high porosity, the high water retention rate and the high air permeability, is safe and non-toxic and can be biodegraded in vitro.

The utility model relates to the technical field of medical equipment, in particular to a protective sleeve for the tip of an endoscope. Comprising a protective sleeve body, the body is integrally formed by a first sleeve and a second sleeve, an abutting circular truncated cone is arranged in the first sleeve and used for abutting against a hard portion of the tip of an endoscope, and open grooves are formed in the two sides of the end and used for discharging residual water. A fixing part is arranged at one end of the second sleeve and comprises an endoscope insertion opening and a tightening assembly, the insertion opening is made of silica gel, has elasticity and can be matched with endoscope tip parts with different diameters, the tightening assembly comprises a fixing connector, a tightening belt and an upper cover, the tightening belt is guided through an I-shaped through hole, and the upper cover is hinged to the fixing connector and connected with the fixing connector through a buckle. The protective sleeve can prevent the endoscope from being damaged in the transportation and storage process, is easy to clean and disinfect, has no disinfection dead angle, allows residual water in the endoscope to be smoothly discharged through the open groove, avoids corrosion or bacterium breeding caused by water retention, and saves maintenance cost.

This utility model discloses a storage device for processing celery, comprising: a placement rack, a placement limiting groove on the front surface of the placement rack, a water guide plate fixedly connected to the lower surface of the placement rack, a water guide groove on the side wall of the water guide plate, a sealing baffle fixedly connected to the lower surface of the placement rack, a drainage block fixedly connected to the side wall of the placement rack, a water storage tank on the upper surface of the drainage block, and a connecting groove on the inner surface of the water storage tank. The placement limiting groove precisely engages the celery container, preventing it from shifting during storage or slight movement, thus ensuring storage stability. The water guide plate catches dripping water from the container, the water guide groove quickly guides the water flow, preventing water accumulation and impurity growth at the bottom of the placement rack, the drainage block provides support, the water storage tank temporarily stores water, the connecting groove connects to the drainage path to prevent water retention, and the sealing baffle effectively prevents water leakage.

The invention provides a frozen bullfrog composite non-phosphorus water-retaining agent as well as a preparation method and application thereof, the water-retaining agent is prepared by self-assembling silk fibroin nanofiber bundles and microcrystalline cellulose / modified oat beta-glucan micron support columns under the driving of dry honey powder and cooperating with blood cell powder, aldehyde pectin and other functional components. The water-retaining agent can be effectively embedded into bullfrog muscle tissues, and large ice crystal damage is inhibited through physical support and anti-freezing protection in the freezing storage stage; through elastic filling, gel network and covalent anchoring effects in the unfreezing and cooking stages, juice loss is remarkably reduced, protein oxidative denaturation is prevented, meat tenderness is maintained, water retention and color protection effects are achieved, and the technical problems that a traditional phosphate water-retaining agent is high in health risk and quality degradation is caused by conventional freezing are solved.

The invention belongs to the technical field of biomedical polymer materials, and relates to a wound dressing for chronic wounds and a preparation method of the wound dressing. The wound dressing comprises an outer protective layer, an inner protective layer and an inner protective layer which are sequentially stacked from top to bottom, and the outer protective layer is made of a flexible hydrophobic film and used for blocking external pollution; the water-absorbing and water-retaining layer is made of a water-absorbing foam material and is used for absorbing seepage of the wound surface and maintaining a wet environment of the wound surface; the simulated extracellular matrix layer comprises a biocompatible matrix and micro-nano short fibers embedded in the biocompatible matrix, and is used for simulating an extracellular matrix to promote wound healing; the extracellular matrix simulation layer is provided with seepage holes for wound seepage to reach the water absorption and retention layer. The simulated extracellular matrix layer on the surface of the wound dressing simulates a natural extracellular matrix, can guide cell migration and proliferation and does not allow granulation to grow in, seepage holes formed in the simulated extracellular matrix layer allow wound seepage to reach the middle water absorption and water retention layer, and normal humidity of a wound is kept while the seepage is stored in the water absorption and water retention layer.

The invention relates to the technical field of soil water retention, and particularly provides a soil water-retention slow-release conditioner as well as a preparation method and application thereof. The soil water-retaining slow-release conditioner comprises a porous carrier matrix and a composite nutritional agent, pores of the porous carrier matrix are filled with the composite nutritional agent, the porous carrier matrix is of a three-dimensional network structure, and the porous carrier matrix at least comprises modified fly ash, acrylic acid, acrylamide, starch and urea which are crosslinked together. The modified fly ash has an aluminosilicate net structure. The preparation method of the soil water-retaining slow-release conditioner is used for preparing the soil water-retaining slow-release conditioner. The soil water retention slow-release conditioner is used for soil water absorption and soil water retention. According to the soil water-retaining slow-release conditioner as well as the preparation method and the application thereof, the water-retaining property and the water-absorbing property of soil are improved, and the fertilizer-retaining capacity of the soil is improved.

The invention discloses a pleurotus eryngii production and processing anti-adhesion conveying device, and relates to the technical field of pleurotus eryngii production and processing, the pleurotus eryngii production and processing anti-adhesion conveying device comprises a rack, the inner side of the rack is fixedly connected with two elastic plates, and one side of the rack is provided with a suction pump; the output end of the suction pump penetrates through the inner side of the elastic plate and is fixedly connected with a second connecting pipe, and a first connecting pipe is installed at the other end of the suction pump. By arranging the wave swinging mechanism, pleurotus eryngii is driven to be continuously turned over, so that all parts on the surface of the pleurotus eryngii can be alternately exposed in air, the air can fully flow through all contact surfaces of the pleurotus eryngii, water evaporation is accelerated, meanwhile, the turning action can enable the pleurotus eryngii to be rapidly separated from the outside contact parts, and the pleurotus eryngii is prevented from being damaged. According to the pleurotus eryngii cleaning device, water retention and adhesion caused by long-time contact are reduced, meanwhile, impurities on pleurotus eryngii bodies can be shaken off, and therefore the cleanliness of pleurotus eryngii is improved, and the overall practicability of the pleurotus eryngii cleaning device is improved.

The invention relates to the technical field of hydraulic engineering protection materials, and particularly discloses an anti-shrinkage composite grouting material for filling dike-damaging animal caves and an application method of the anti-shrinkage composite grouting material. The material consists of a gelling component, an expansion component, a water retention component and mixing water, the gelling component comprises cement and clay; the expansion component comprises a calcium sulphoaluminate inorganic expansion agent and high-molecular water-absorbent resin; the water retention component is cellulose ether. The inorganic expanding agent is used for compensating early chemical shrinkage, the high-molecular water-absorbent resin is used for providing later wet expansion self-healing capacity, and the water retention components and the optimized construction process are combined, so that the technical effects of synergistic expansion, multiple water retention and multiple filling are achieved; the problem that filling is not compact due to water loss and shrinkage of a traditional grouting material is fundamentally solved, and the anti-seepage safety and long-term stability of a dam are remarkably improved.

The invention provides a self-cleaning stagnant water prevention type pressure tank and method. The self-cleaning stagnant water prevention type pressure tank comprises an air bag which is divided into a water chamber and an air chamber through the air bag; the charging connector is arranged at the top of the pressure tank and is communicated with the air chamber; the liquid level annunciator is arranged on the pressure tank and is matched with the controller for use; the communicating opening is formed in the end, away from the inflation nozzle, of the pressure tank, and the dead water preventing mechanism is arranged in the communicating opening. The water outlet flow channel with the built-in control mechanism and the water inlet channel with the built-in one-way control valve are additionally arranged in the dead water prevention mechanism, so that inlet water and outlet water in the pressure tank are separated, a dead water area caused by local water retention can be effectively prevented, and microorganism breeding is avoided.

The invention relates to the technical field of traditional Chinese medicine, and discloses a traditional Chinese medicine composition for treating chronic pulmonary heart disease in the heart failure stage and application of the traditional Chinese medicine composition. 15 g of ginseng; 10 g of herba ephedrae; 15 g of rhizoma belamcandae; 10 g of dried ginger; 5 g of asarum; 15 g of white mulberry root-bark; 30 g of semen lepidii; 30 g of a magnet; 30 g of oyster; 15g of poria with hostwood; 15 g of semen boitae; 15 g of polygala tenuifolia; 15g of schisandra chinensis; the traditional Chinese medicine composition is prepared by the following steps: pretreating the traditional Chinese medicine raw materials, decocting with water twice, and combining filtrate, so that the finally prepared traditional Chinese medicine composition has the effects of tonifying qi and warming yang, tonifying lung and kidney, purging lung and inducing diuresis, reducing phlegm and relieving asthma, and calming heart and tranquilizing, and is suitable for chronic pulmonary heart diseases caused by yang deficiency and water flooding, turbid phlegm obstructing lung and heart and kidney deficiency. The traditional Chinese medicine composition can obviously improve the symptoms of cough and asthma, palpitation, edema, shortness of breath, weakness and restlessness at night, and clinical verification shows that the traditional Chinese medicine composition is definite in curative effect, high in safety and suitable for clinical popularization and application.

The invention discloses leg essence containing rutin, the leg essence is a double-phase essence, and the leg essence is composed of an oil phase and a water phase according to a weight ratio of (1-4): (2-7), the water phase is prepared from the following components in parts by weight: 0.01 to 1.5 parts of rutin liposome, 0.1 to 5 parts of grape vine extract, 0.1 to 3 parts of microcirculation dynamic factors, 0.1 to 4 parts of jania rubens extract, 0.5 to 1.5 parts of hexanediol, 0.5 to 0.8 part of p-hydroxyacetophenone, 1 to 8 parts of 1, 2-pentanediol, 0.2 to 1 part of thickening agent and the balance of water; the oil phase is prepared from the following components in parts by weight: 0.1 to 6 parts of abelmoschus manihot essential oil, 1 to 10 parts of plukenetia volubilis seed oil, 1 to 10 parts of pumpkin seed oil, 0.1 to 5 parts of zingiber zingiberensis extract, 0.1 to 3 parts of grapefruit essential oil, 20 to 50 parts of coconut oil alcohol-octoate / caprate, 20 to 40 parts of isopropyl myristate and 10 to 30 parts of squalane. The components in the formula supplement each other and have a synergistic effect, the conditions of leg edema and obesity are effectively improved, the water storage capacity of the skin is promoted, blood circulation and metabolism are promoted, and the oil is not greasy.

The invention discloses a carbon-based composite water-retaining agent and a preparation method and application thereof.The preparation method comprises the following steps that S1, flue-cured tobacco stems are subjected to high-temperature pyrolysis, and biochar is obtained; s2, respectively grinding and crushing biochar and potassium humate, drying, sieving with a 100-mesh sieve to obtain biochar powder and potassium humate powder, and dispersing the two powders in deionized water to obtain a mixed solution A; s3, dissolving acrylic acid in water under an ice-water bath condition, adding sodium hydroxide for neutralization, and then adding acrylamide to obtain a solution B; adding the mixed solution A into the solution B, and uniformly mixing to obtain a reaction solution; and S4, adding an initiator and a cross-linking agent into the reaction solution, then carrying out stirring reaction under the condition that the water bath temperature is 70-90 DEG C until gel is formed, then soaking and cleaning with absolute ethyl alcohol, and then drying and crushing to obtain the carbon-based composite water-retaining agent. The water-retaining agent provided by the invention not only improves the drought-resisting and water-retaining capacity of soil, but also increases the organic carbon content of the soil, and can promote the growth of crops.

The invention discloses a semi-interpenetrating network structure hydrogel with a high water retention rate as well as a preparation method and application of the semi-interpenetrating network structure hydrogel. The hydrogel is prepared through a free radical polymerization method, guar gum is used for constructing a high-water-retention framework, a large number of hydrophilic functional groups are provided, hydrogen bonds are formed between the hydrophilic functional groups and water molecules, and the water retention capacity of the hydrogel is enhanced. In addition, by introducing the hygroscopic ionic liquid, the water retention effect is further enhanced, a large number of ion transport channels are provided, and a chemical crosslinking-semi-interpenetrating network-ionic liquid enhanced stable network structure is formed. The hydrogel electrolyte shows excellent water retention capacity, and when the hydrogel electrolyte is applied to the flexible zinc-air battery, the service life of the battery can be remarkably prolonged, the specific capacity of the battery can be remarkably improved, and the peak power density of the battery can be enhanced. The method is simple in process and environment-friendly, and has a good application prospect in wearable energy storage equipment.