A study of college students has shown that critical skills related to attention, memory, and learning are impaired among people who use marijuana heavily, even after discontinuing its use for at least 24 hours. Researchers compared 65 heavy users, who had smoked marijuana a median of 29 of the past 30 days, and 64 light users, who had smoked a median of 1 of the past 30 days. After a closely monitored 19- to 24-hour period of abstinence from marijuana and other illicit drugs and alcohol, the undergraduates were given several standard tests measuring aspects of attention, memory, and learning.

These are stimulants used primarily to delay the onset of mental and physical fatigue. Students studying long hours for exams, athletes who feel the drugs will improve their performance, and workers who want to stay awake on the job often use stimulants. These drug compounds are often found in diet pills which, if misused, can lead to anorexia nervosa. Anorexia nervosa is a pathological loss of appetite thought to be psychological in origin that is manifested in extreme dieting and excessive thinness. Caffeine is also found in many beverages, pain medications, and allergy and cold remedies.

برنامج تعلم الانجليزية للاطفال بالصوت و الصور و بدون إنترنت من أفضل برامج تعليم الحروف والأرقام للأطفال ، فهو يعالج مشاكل الأطفال في تعلم قواعد اللغة العربية و اللغة الانجليزية ، بالاضافة لاكساب الأطفال أساسيات التعلم بشكل عام  ، برنامج تعلم اللغة الانجليزية من أفضل البرامج التي تعمل على اكساب الأطفال المعارف والمفاهيم بصورة محببة وشيقة ، بالاضافة لقواعد النطق اللغوي السليم عبر إثراء القاموس اللغوي والمعرفي الخاص بالطفل ، يعمل البرنامج 100 % دون الحاجة إلى الانترنت ، ويساعد الطفل على تعلم الحروف و الأرقام كتابة و كيفية النطق بها مع إعطاء أمثلة خاصة بالكلمات والحروف المذكورة مع الصور وذلك لضمان تعلم الطفل مدى الحياة ، تابع تفاصيل أكثر عن برنامج تعلم اللغة الانجليزية ضمن أفضل برامج تعليمية للأطفال للتحميل المباشر من الأسفل .
Nicotine also is absorbed readily when tobacco is chewed. With regular use of tobacco, levels of nicotine accumulate in the body during the day and persist overnight. Thus, daily smokers or chewers are exposed to the effects of nicotine for 24 hours each day. Nicotine taken in by cigarette or cigar smoking takes only seconds to reach the brain but has a direct effect on the body for up to 30 minutes.

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وبدأت وأنا عمري 16 سنة في تدخين الحشيش وشرب الخمر لأول مرة وذلك أيضًا بدافع المغامرة و حبي للتجربة و الشعور بالاختلاف. تصورت في هذا الوقت أن لا أحد يستطيع أن يفعل مثلي، فكنت ألتقي مع أصدقائي في كل يوم خميس ليلاً لكي ندخن الحشيش ونشرب الخمر ونضحك ونتحدث. استمر هذا الحال سنوات قليلة وكانت شكوك أهلي كثيرة تجاهي بسبب كثرة سهري خارج المنزل والأحاديث السرية في التليفون وأموري الغريبة. ولكني كنت أنجح في الدراسة لذلك لم يستطيعوا مواجهتي بالتقصير أو الإهمال. في ذلك الوقت كنت أنجح في الدراسة عن طريق الغش والتزوير.
Research also indicates that some users might turn to other drugs to alleviate some of the negative effects of anabolic steroids. For example, a study of 227 men admitted in 1999 to a private US treatment centre for dependence on heroin or other opioids found that 9.3 percent had abused anabolic steroids before trying any other illicit drug. Of these 9.3 percent, 86 percent first used opioids to counteract insomnia and irritability resulting from the anabolic steroids. [2]
Nicotine also is absorbed readily when tobacco is chewed. With regular use of tobacco, levels of nicotine accumulate in the body during the day and persist overnight. Thus, daily smokers or chewers are exposed to the effects of nicotine for 24 hours each day. Nicotine taken in by cigarette or cigar smoking takes only seconds to reach the brain but has a direct effect on the body for up to 30 minutes.

Some users of cocaine report feelings of restlessness, irritability, and anxiety. An appreciable tolerance to the high may be developed, and many addicts report that they seek but fail to achieve as much pleasure as they did from their first exposure. Scientific evidence suggests that the powerful neuropsychological reinforcing property of cocaine is responsible for an individual’s continued use, despite harmful physical and social consequences.

Text to speech enables brands, companies, and organizations to deliver enhanced end-user experience, while minimizing costs. Whether you’re developing services for website visitors, mobile app users, online learners, subscribers or consumers, text to speech allows you to respond to the different needs and desires of each user in terms of how they interact with your services, applications, devices, and content.
The central nervous system (CNS) actions that result from taking even small amounts of methamphetamine include increased wakefulness, increased physical activity, decreased appetite, increased respiration, hyperthermia, and euphoria. Other CNS effects include irritability, insomnia, confusion, tremors, convulsions, anxiety, paranoia, and aggressiveness. Hyperthermia and convulsions can result in death.

In 1989, the U.S. Surgeon General issued a report that concluded that cigarettes and other forms of tobacco, such as cigars, pipe tobacco, and chewing tobacco, are addictive and that nicotine is the drug in tobacco that causes addiction. In addition, the report determined that smoking was a major cause of stroke and the third leading cause of death in the United States.

Death from inhalants usually is caused by a very high concentration of fumes. Deliberately inhaling from an attached paper or plastic bag or in a closed area greatly increases the chances of suffocation. Even when using aerosols or volatile products for their legitimate purposes (i.e., painting, cleaning), it is wise to do so in a well-ventilated room or outdoors.

Psilocybin mushrooms, more commonly known as magic mushrooms, are a group mushrooms that grow in the wild which have similar effects to LSD when consumed. Psilocybin is the psychoactive chemical in the mushrooms. There are many types of psilocybin mushrooms, psilocybe semilanceata being the one most often consumed for recreational drug use. There are other species of mushrooms, not containing psilocybin but still containing psychoactive substances, which are often called magic mushrooms. The most frequently quoted of these is amanita muscaria which is highly poisonous and potentially deadly. Appearance-wise, psilocybin mushrooms look similar to normal mushrooms, and amanita muscaria mushrooms are spotted red and white.
Laughing gas is available several forms, one being the medical form which is produced to be used as an anaesthetic and is therefore subject to pharmaceuticals law. A second, less pure form of laughing gas is for commercial use and is commonly used to tune engines. This less pure form may often contain other chemicals or gases such as methyl nitrate which can lead to oxygen deficiency in the human body. Laughing gas can also be purchased in cartridges that can be used to make whipped cream.
برنامج طيور الجنة للجوال يقدم مجموعة من الأناشيد المتنوعة والهادفة للأطفال ، يمكن للطفل من خلاله الاستماع لكافة أناشيد طيور الجنة عبر الموبايل بدون انترنت ، يتميز التطبيق بكونه ممتع وسهل ويسعى لتقديم مهارات تعليمية مميزة للأطفال ، كتعلم مهارة الحروف والأرقام بالإضافة لمهارات التواصل ، وكل ذلك عبر مجموعة من الأناشيد الممتعة والمليئة بالحركة والإبداع والمحببة للأطفال من كل الأعمار ، يعتبر برنامح أناشيد طيور الجنة من ضمن أفضل برامج تعليمية للأطفال سن سبع سنوات ، للحصول على التطبيق يمكنكم تحميله عبر رابط مباشر من خلال الزر التالي في الأسفل .
برنامج تعلم الحروف والأرقام العربية والانجليزية للجوال هو تطبيق تعليمي مخصص لتعليم الأطفال الصغار اللغة العربية والانجليزية بأسهل الطرق وأيسرها ، يدعم البرنامج مهارات تعلم الرياضيات والجمع والطرح والقسمة ، كل ذلك من خلال ألعاب تعليمية تقوي مهارات الحفظ والاستماع لدى الطفل ، ناهيك عن تعليم الأطفال مهارات كتابة الحروف العربية بالرسم الصحيح والسهل للطفل ، بالإضافة لتعليم الأطفال مهارات القراءة والكتابة والحروف العربية والانجليزية بدون نت من خلال استخدام أغاني الحروف العربية والانجليزية ، يحتوى التطبيق على الحروف العربية مكتوبة ، مع إمكانية سماع النطق الصحيح للحرف كما أن كل حرف مزود باغنيه له لتسهيل عملية الحفظ ، تابع من الأسفل أبرز مميزات برنامج تعلم الحروف والأرقام كما يلي :
English contains several sound homographs, all with distinct histories. For example, the sound that means "something heard" descends from Latin sonus ("sound"), whereas the sound that means "to measure the depth of water" traces to Old French sonde ("sounding line"). Another sound, however, is the contemporary form of Old English's gesund. Gesund is related to several words in other languages, such as Old Saxon gisund ("sound"), Old Frisian sund ("fresh, unharmed, healthy"), and Gothic swinths ("sound" or "healthy"). Another relative is Old High German's gisunt ("healthy"), which led to modern German's gesund, the root of gesundheit.
Magic mushrooms are normally consumed orally (ie. eaten) either raw or dried out. Raw magic mushrooms are about 90% water. Amanita muscaria is not often eaten raw as the user can experience severe nausea. Magic mushrooms may also be cooked or combined in food dishes though heating generally breaks down the psychoactive substance. 1 to 5 grams are normally consumed.