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Inflatable or Hard-Shell? Help a Kayaking Newbie Decide!

Hi everyone, I’m super excited to get into kayaking! I’ve only rented a couple of times, but I’m ready to buy my own now. I live near a lake but also want the flexibility to explore rivers occasionally. I’ve been going back and forth between getting an inflatable kayak for portability or a hard-shell one for durability. Any advice for someone just starting out? Are there any specific brands or models I should look into?

47 comments

47 Comments

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whitelily624

Development characteristics of pharmaceutical intermediate suppliers

The development characteristics of pharmaceutical intermediate suppliers mainly include the following aspects:

Market demand and industry trends: The pharmaceutical intermediate industry is growing with the development of the pharmaceutical industry, especially in Asia. European and American pharmaceutical companies are shifting their production focus to innovative drug research and development, leading to the transfer of the pharmaceutical intermediate industry to Asian countries such as China and India. This transfer not only meets local market demand, but also provides key raw materials for the global pharmaceutical industry.

Market competition and industry concentration: The Chinese pharmaceutical intermediate industry has a high degree of marketization, with many small and medium-sized enterprises and concentrated production areas, but fierce competition. Due to the implementation of environmental protection and safety production supervision policies, enterprises that cannot meet green production standards will be eliminated, and industry concentration is expected to increase. At present, Prolo Pharmaceutical is the leader in China's pharmaceutical intermediate industry with the highest market share.

Technical level and product quality: Despite the rapid development of China's pharmaceutical intermediate industry, it still relies on imports for high-end products and technology. Domestic enterprises still have room for improvement in production processes and quality to meet the demand for high-quality intermediates in the pharmaceutical industry.

Policy impact: National environmental protection policies and safety production supervision have a significant impact on the pharmaceutical intermediate industry. Strict environmental protection and safety production requirements encourage enterprises to upgrade their technology and upgrade their equipment. Enterprises that do not meet the standards will be eliminated, and the overall level of the industry is expected to improve.

whitelily624

Apr 08

Extraction method of cosmetic raw materials

The extraction methods of cosmetic raw materials mainly include three categories: physical extraction, chemical extraction, and biological extraction.

Physical extraction method

Steam distillation: Put the raw materials into a dedicated device, use the temperature and pressure of water vapor to evaporate and condense the active ingredients for collection.

Solvent extraction: Mix the raw materials with a solvent, dissolve the active ingredients in the solvent through stirring, soaking, and other methods, and then obtain the extract by evaporating the solvent.

Ultrasonic extraction: Utilizing the mechanical vibration of ultrasonic waves, the active ingredients in the raw materials are rapidly released and combined with the solvent to form an extract.

Chemical extraction method

Acid base method: By adjusting the pH value, the active ingredient is dissolved under specific conditions.

Enzymatic hydrolysis: Utilizing enzymes to hydrolyze large molecular substances for easy extraction.

Esterification method: Ester compounds are generated through the reaction of acid anhydrides, and active ingredients are extracted.

Biological extraction method

Microbial fermentation method: adding microbial strains and utilizing their metabolites to transform raw materials.

Protease method: using proteases to hydrolyze proteins and extract small molecular substances such as amino acids.

The extraction process of plant raw materials

Determine extraction site: Select plant roots, stems, leaves, and other parts according to functional requirements

Selection of extraction process: Common processes include solvent extraction, ultrasonic extraction, enzyme extraction, microwave-assisted extraction, supercritical fluid extraction, etc.

Purification treatment: Further purify the extract by column chromatography separation and other methods to obtain plant extracts that can be used for subsequent evaluation.

whitelily624

Feb 21

Do silicon sex dolls need a cover?

Whether to wear a cover when using silicon sex dolls depends mainly on the type of doll and the usage scenario. ‌

For inflatable dolls, it is recommended to use condoms. Wearing a cover can provide some protection and also extend the lifespan of the inflatable doll. Inflatable dolls need to be lubricated before use, and men may experience ejaculation during the process. Even if cleaned in a timely manner, dirt may still be left behind, increasing the risk of infection.

For silicone dolls, although they do not transmit diseases themselves, hygiene should still be taken into account during use. Before use, the doll should be placed in a clean and private space, and a special lubricant should be applied to avoid damaging the surface of the doll. After use, use a mild detergent and warm water to clean the private parts of the doll, then dry them with a dry towel and store them in a dry and ventilated place.

In addition, both inflatable dolls and silicone dolls should be cleaned and disinfected before and after use to ensure hygiene.