Yellow apple snail appears in high density and damages summer-autumn rice. Mr. Le Xuan Tu, Director of the Sub-Department of Cultivation and Plant Protection said that the yellow apple snail harms the newly sown rice stage, greatly affecting the growth and development of rice plants, if high density can make 100% loss of trees in the field. In order to minimize the damage caused by yellow apple snail, farmers need to apply a combination of manual measures and chemical measures to increase the effectiveness of killing snails. When the density of snails is high, snails are small, in order to thoroughly limit harmful yellow apple snails, people use drugs with active ingredients, such as Metaldehyde, Niclosamide to eradicate. Dosage according to the manufacturer’s instructions on the packaging. People should note that when using the drug, it is necessary to maintain the water level from 3-5cm to prevent high efficiency; Spray in the early morning or late afternoon because this is the time when snails are most active. Pesticides to prevent snails are often toxic to aquatic animals, so they should only be used when the snail density is high, avoiding use in rice and fish fields. In addition, other objects are causing harm with an increasing trend, such as: rats harming 71.2 hectares, leaf rollers 60 hectares, acacia caterpillars 50.2 hectares, thrips 36 hectares…. The Sub-department recommends that farmers keep a close eye on the fields, closely monitor the situation of harmful effects, proactively implement timely and effective prevention measures.

Eel farming according to new model. (Photo: Anh Tuyet/VNA) Farmers in Can Tho city are very excited because intensive farming of field eels using water circulation technology has helped them stabilize their livelihoods and get rich with typical products. This is a research achievement that has been implemented into reality by scientists of the Can Tho University . Associate Professor, Dr. Pham Thanh Liem, Head of the Department of Freshwater Aquaculture Technology, Can Tho University, Head of the project, shared from the fact that eel farming households in Can Tho are implementing two projects. farming, with soil and without soil with plant media or bamboo/nylon blisters all have limitations. Because, for the farming model with land, the stocking stock is large in size, often using natural seed, the food used is trash fish or homemade food, low density, eels hiding in the mud become a hindrance in the management of feed and health of farmed eels. In landless farming model , if it is an eel obtained from the wild, the growth and yield are lower than the land culture model. The rate of water change in both farming methods ranges from 1-1.3 times/day with 100% fresh water. Both of the above methods give low eel farming productivity of less than 10kg/m2. If the stocking density is increased, the water exchange rate will increase and increase the risk of disease, environmental pollution and food safety. Since 2018, the research team has implemented the intensive farming model field eels by water circulation technology. This is a model that meets food safety and traceability requirements, while maintaining environmental quality and protecting natural resources. The strength of the model is the application of technical and biological solutions, self-cleaning and reuse of water sources, increasing the maximum eel farming density up to 600 fish/m2 and increasing productivity to 25kg. commercial eel/m2. The productivity of farmed eel also increased from 2.5-4 times compared with conventional farming model; profit efficiency is from 36.5-60.2%. Households raising eel under the new model ensure safe operation, control of pathogens, health and quality of farmed eel products; minimize the rate of water change, increase the output of cultured eel; improve and increase the growth rate, eel quality and production efficiency; allows the treatment of contaminated water and helps control the discharge process. Thereby, contributing to environmental protection; forming and developing farming technology to create clean, high-quality products, meeting the needs of consumers. Currently, the model is starting to be transferred and deployed in a number of breeding and commercial eel farming sites in Can Tho city. Mr. Nguyen Thanh Tan, owner of Binh Thuy farm, Long Tuyen ward, Binh Thuy district has implemented the eel farming model in the form of water circulation since 2019, on a test area of ​​30m2, including 5 tanks, each tank is 6m2. The culture tank is designed to connect to the water circulation system including a biological filter tank, a solid waste settling tank and a water tank. The flow of water through the aquarium is adjusted from 0.5-0.8 liters/min. Black nylon rope is tied into a beam with a length of 20-30 cm, used for sheltering eels. This cord is cleaned daily and renewed once a month. Model of an eel tank based on water circulation technology. (Photo: Anh Tuyet/VNA) Eels are incubated for 90 days, size from 1.4-3.2g/head. Eel feed is industrial pellets, with 41% protein content. Instead of having to change the water every day like the old model, in the water recirculation model, the water is changed every 2-3 weeks. This helps farmers reduce labor costs, water costs, as well as help stabilize the water quality of the aquarium, and the eels are healthier and faster. After 8-9 months, commercial eels can reach 400g / head, farmers’ profits doubled compared to the old model. “In the commercial eel farming group of Binh Thuy district, there are currently more than 10 households out of 40 members who have switched to raising eels using water circulation technology. In general, the model is quite easy to install, the initial cost is The income is not high. The members are aware of supporting each other in farming techniques as well as product output. Therefore, most of the farming households give quite positive feedback,” said Mr. Tan. According to Associate Professor, Dr. Pham Thanh Liem, in the near future, the model will be replicated in Ninh Kieu and Phong Dien districts. The purpose is to support farmers to increase the technology content in farming and farming.

Before this review, please also say that I am not a fan of the built-in amps. Cramming an entire preamp, poweramp, and even a digital source into one box to me has never seemed the smartest technical choice. Clearly, such a composite design not only significantly increases the risk of electromechanical interactions between three different circuits, but the power supply also faces the ability to provide independent stable power to multiple functional boards. . However, after a period of experience with Goldmund Telos 590 NextGen II, a 125W Class A / B amplifier, equipped with 384K / 32-bit DAC decoder, I and a few colleagues had to change their perception. about the performance capabilities of the integrated amplifier. Technical structure On the outside, the Telos 590 NextGen II looks identical to its predecessor, NextGen I, which was once highly regarded. It’s a rectangular box made of solid, harmonious, rectangular steel, weighing about 20kg, with an LED display that serves as a center console in the center of the front. Above the screen is a glossy gold Goldmund logo placed solemnly in the center. The display correctly shows 3 indicators: on the left side is the selected number of inputs (from “1” to “8” and all stops in the middle); on the right is the volume level (from “00” to “99”); and the center indicates the device’s power status (a pair of horizontal bars light up confirming that the source is turned on and the built-in device is ready to play music). There are metal knobs on either side of the LED screen (two buttons in total). The left button will change the input and the right button will change the volume. The knobs when turned quite lightly and show the next drag when rotating. While the input and volume controls can be done directly via the front panel controls, Goldmund still features a compact metal remote control to meet the demands of lazy audiophiles. moved on. This remote also lets you perform other functions through the buttons. In addition to changing the input and volume levels, it allows you to mute the pre-amp (also turn off the volume lights on the right side of the LED panel) or put the unit in Standby mode (this also dimming the whole monitor sets). On the back, the Telos 590 NextGen II has 8 inputs and a complete set of loudspeaker wiring stakes without criticism. If you are an audio enthusiast using subwoofer, you will be out of luck with the Telos 590 NextGen II, because the manufacturer wants this integrated amplifier to be a “purest” component for the sound system. stereo and traditional two-channel music lover. The amplifier has 3 digital inputs including a USB 2.0 port, a TosLink and a 75 ohm SPDIF coaxial and 5 pairs of analog RCA. The machine is also integrated 32-bit DAC, with the ability to receive and decode high-resolution digital music sources in a variety of formats, including 32bit / 384kHz PCM and DSD 128. The fin-shaped heatsinks are designed on either side of the chassis. Unlike Krell, which often makes “razor sharp”, the radiator of Telos 590 Nextgen II is smooth enough to touch without causing injury and although in fact this amplifier has a fairly large capacity, but they are still not too hot. . It’s all thanks to Goldmund recently developing a sophisticated cooling system. “The company has created a mechanical link between the power MOSFETs and the heatsink to make heat dissipation more efficient. This mechanical refinement contributes to flexibility, providing extreme dynamics and speed. In fact, the Telos 590 NextGen II has become refined, comfortable and smooth with dense colors and details No one would have thought that a mechanical device, independent of the actual circuit. , it can make such a profound difference “. As many people know, Goldmund’s electronics have long been praised for their power, speed, and resolution. In addition, they are prized for their gentle, mellow tonal balance. For listeners looking for detail delivered with lifelike speed and impact, Goldmund’s products have long competed with the best. However, for listeners looking for warm, natural sounds and 3-dimensional space, they have not yet satisfied much. For example, the Telos 590 NextGen a few years ago had been well-praised for its very high resolution, characteristic of Goldmund, but still had slight flaws for still being cold. But the new Nextgen II version of this integrated amplifier has changed completely when showing a different face. Of course, Goldmund also claims improvements in the circuitry of the Telos 590 Nextgen II, including reduction of intermodulation distortion (especially important for woofer control), improved linearity in all The amplification stages and greatly reduces time distortion. The company also says on its website that the key to high-fidelity audio is achieving the right balance between power and control. Judging by the results, Goldmund definitely achieved his goal with the Telos 590 Nextgen II. Sound quality assessment To hear what Goldmund advertised, all you have to do is find a live recording that features a performer you often listen to and love. In this try we chose the great blues guitarist BB King and the popular album Live at the Regal. I enjoyed the King band’s performance (all smart uniformed trumpets swing their instruments perfectly between breaks, like the drummers swing their baton) , or the beautiful melody of King’s guitar, Lucille, and the expressive way he plays it and sings. Through Goldmund, Lucille is “inflated” into three dimensions, her voice is filled and “deeper”, comes close to the male voice and feels miraculously revived. And not only did Lucille benefit from the NextGen II “treatment”, but so did King’s silky, vaguely high-pitched voice like Nat Cole, creating a sweet contrast to his historic guitar playing style. his. Nextgen II not only brought Lucille and King to life as if they were singing live, but it also had the same effect on his wonderful acoustic rhythm. We can almost see them play and rotate simultaneously on stage from left to right. It can be said that NextGen II is still a champion when it comes to detail reproduction – both in music, performance and technique. If you are a simple audiophile “cannot live” without hearing a single chip (made of thin copper pieces or from laminated bamboo, fixed at an upper open end in the flat surface of a trumpet or tube) flute) of the saxophone fluttering gently at the end of a long note, like Branford Marsalis’s tenor saxo in Harry’s “A Nightingale Sang in Berkeley Square”, the Telos 590 NextGen II is sure will be your first choice. What sets the Telos 590 apart from the original Telos 590 (and previous generations of Goldmund) is that in addition to the instrumental and performance details, NextGen II also offers the colors of that sax and tuba. almost perfect. Once you combine ultra-high resolution with incredibly natural tone, pitch, intensity, and duration, you get what everyone calls completeness – along with neutral, one of the two. An indispensable element of the equipment used to recreate the real stage. And the Telos 590 NextGen II has such a finish, at an excellent level. Conclude
Goldmund’s Goldmund Telos 590 NextGen II excels in low-end and strength (but in some respects, mid- and high-range still). And it did so without great reservations about soundstage size, dynamics and impact, detail retrieval and noise levels. You can hear all of these advantages in Goldmund’s built-in amps, especially in the bottom octave, where it has such a power, solidity, and tonal density that I would not have dared to think of. As you add the sweetness and friendliness of the sakura to the mids and highs to this incredibly solid bass and power base, you get neutral tones for tonal and fidelity great that every music lover craves.

How to calculate the energy density in foods

It is possible to calculate the energy density of a food if you know the portion’s weight (in grams) and how many calories it contains. The energy density of a food is the number of calories divided by weight.

Energy density = calories / food weight (grams)

People divide food by energy density into categories:

Food with a very low energy density = less than 0.6 kcal / g

Food with low energy density = 0.6 to 1.5 kcal / g

Food with an average energy density = 1.5 to 4 kcal / g

Food with a high energy density = more than 4kcal / g

Therefore, it is better to stick to a diet with foods with low or very low energy density, consuming a moderate amount of some medium energy density foods, and consume foods with a higher energy density in small amounts and less often. It is the advice of health professionals so that you can maintain a reasonable weight level while ensuring satisfaction after each meal.

Foods that have the right energy density for people wanting to lose weight

Foods with lots of water: Water does not produce energy but takes up a certain volume and weight in the stomach. To reduce the energy you eat and still feel full, you should drink more water before a meal or eat more soup with the meal, use water-rich foods such as soup, porridge, noodles, pho, …

The “dilution” of the food as above will help increase the volume and volume of food many times without changing energy. Obviously when we eat rice with soup, we get full faster than rice without soup.

Porridge has a much lower energy density than rice. 100 g of porridge contains about 50 kcal while 100 g of rice contains up to 140 kcal.

Foods rich in fiber: Vegetables and fruits are not only rich in fiber but also high in water. The water content of the fruit accounts for 60-95% depending on the type, so the energy provided by vegetables and fruits is generally not high. The same weight is 100 g, but vegetables only contain about 20-30 kcal while protein or sugar powder contains 400 kcal; while oil and fat contain up to 900 kcal, 30 times more than vegetables.

Types of seed, dew sa, latex Trom, seaweed … contain many types of soluble fiber, this type of fiber when absorbing water expands to increase in volume and volume. As a result, they are kept longer in the stomach, creating a feeling of fullness for a long time. In fact, the satiety index for the fruit group averaged 170 while the satiety index for standard foods, white bread, was only 100.

In fact, brown rice makes us full longer than rice cooked with white rice thanks to its indigestible bran ingredients. Soybeans, green beans, and whole grains are also high in fiber. In legumes, in addition to fiber, there are anti-absorption agents like antitryptine that prevent digestion and absorption, making them feel longer.

Fiber does not directly provide energy, so foods high in fiber help us “full” without causing weight gain.

Low-fat, high-protein foods: Of the 3 energy-generating food groups, fat produces the most energy, up to 9 kcal / 1g. Therefore, to have low-energy dishes, you need to limit fats and fats. You should use fats from fish or plants such as sesame, soybeans, and peanuts because they contain more unsaturated fatty acids that are beneficial to the body than animal fats.

You should note that foods rich in nutrients such as fish, beef … have a higher satiety index than foods rich in carbohydrates, even though 1 g of protein or 1 g of carbohydrates provides 4 kcal. . With the same amount of energy you want to include, if you want to stay full for a long time, you should choose foods rich in protein over foods rich in carbohydrates.

Notes on losing weight you need to know

– Between being active and dieting, it is important to pay attention to the role of diet in weight loss is more and more decisive than being physically active. In addition to the above two factors, other means are just supportive measures;

– Do not set a goal to lose weight within 1 month and each weight loss should last at least 3 months, with a goal of losing 500g per week, if you have achieved it successfully;

– Always have something available, to eat when hungry or crave, never fast or don’t let your stomach be so hungry that anything can eat;

– Practice recording what you eat, exercise the amount of calories consumed during the day. Thereby, we will see the dangers of snacking: It is enough necessary energy but lacks the necessary substances for the body and an excess of substances that easily lead to weight gain;

– Beware of food or meals outside the program such as parties, parties or just a few peanuts, a few small cakes;

– Eating a lot of vegetables is very good for dieting but need to pay attention to fruits, especially those with sweet taste, which are not helpful for weight loss. Vegetables are not high in energy, but there are many vitamins in them;

– Absolutely do not use fried, roasted, leather, baked goods, onion fat, scallions, if you can control yourself, only try 1 piece and only 1;

– Be wary of vegetarians, because most of them contain a high amount of fat and carbohydrates.