Private initiatives, public support, and war practices: development of fertilisers in Russia.

The scarcity of experiments with fertilisers, the poor domestic industry, and high prices for imported products made Russia lag far behind the leading agrarian countries in the research and use of fertilisers. The first experiments on fertilisers were connected mostly with the private estates of Russian nobility. Things began to change slowly by the turn of the twentieth century, when the Ministry of Agriculture launched a policy of agricultural science promotion, including the development of agricultural chemistry. It was the outbreak of World War I that created a powerful stimulus for fertiliser research in Russia. A specific Russian "symbiosis" emerged between military industry and agricultural chemistry. The numerous factories of explosives set up ad hoc produced vast amounts of waste products; modified, they could serve as fertilisers. In 1915, the Public Committee for Support of Fertilisers was organised. Eventually, this committee gave birth to the Institute of Fertilisers, the first institute founded by the Bolshevik government. Thus, the project of "chemicalisation of agriculture," usually described as a revolutionary endeavour, was firmly rooted in World War I.

One hundred years of progress in food analysis.

Food and agricultural products comprise complex and diverse chemical mixtures that historically have presented challenges for assessing food safety, nutrient content, stability, and sensory qualities. The analysis of food composition has significantly evolved over the past 100 years, progressing from reliance on predominantly "wet chemistry" laboratory methods from the early to mid-20th century to their gradual replacement by modern instrumental techniques. Pioneering developments in pH instruments, spectrophotometry, chromatography/separations, and spectrometry often had immediate applications to food analysis. Continuous improvements in methodology over this period have led to significant enhancements in analytical accuracy, precision, detection limits, and sample throughput, thereby expanding the practical range of food applications. The growth and infrastructure of the modern global food distribution system heavily relies on food analysis-beyond simple characterization-as a tool for new product development, quality control, regulatory enforcement, and problem-solving.

[Pharmacist and chemist Henri Braconnot]. / Le pharmacien et chimiste Henri Braconnot.

Henri Braconnot was born in Commercy in 1780. When he was 13 years old, he was bound apprentice in the pharmacy of Graux in Nancy. He remained here for two years, learning pharmacy, chemistry and botany. When the army called him, his position in Strasbourg allowed him to study. After it, he came to Paris and learned in some schools, particularly the Ecole gratuite de pharmacie. Returned in Nancy, forever, in 1802, he was then named as the chairman of the botanical garden and a member of the academy of the town, and he began his results in plant chemistry. He worked almost until his death that occurred in January 1855. Braconnot's work is essentially devoted to chemistry. His name is attached to the extractive principles of vegetables. Some orientations of his research are: plant acids, fats, extractive compounds that may have conduct him to alkaloïds, sugar obtained from saw-dust and rages, other organic plant chemicals, nitration of cellulose, and some others such as colours chemistry, hydrology, physiological chemistry, toxicology, mineralogy. He was never received as an apothecary, but pharmacy has always considered that he belonged to it.

Use and misuse of nitrogen in agriculture: the German story.

Nitrogen (N) fertilization in agriculture has been discussed controversially in Germany for almost two centuries. The agronomist Carl Sprengel, who published his theory on the mineral nutrition of plants in 1828, advocated the use of mineral N fertilizers. Chemist Justus von Liebig, on the other hand, vehemently denied around 1850 the need for N fertilization. Although it soon became evident that Sprengel was right and Liebig was wrong, not much synthetic N fertilizer was used in German agriculture until around 1915, when the Haber-Bosch technique enabled the commercial production of NH3. The use of N fertilizers since then has grown, especially since 1950. To increase agricultural productivity, German governments have promoted, directly and indirectly, the use of N in crop and in animal production. Unfortunately, it was overlooked that N surpluses in agriculture increased rapidly; around 1980 they amounted yearly to more than 100 kg ha(-1). The extensive use of N in agriculture is causing environmental damage and is contributing substantially to the external costs of present agriculture. The main N compounds that affect the environment are N2O, NH3, and NO3. These compounds are considered to contribute one third to the external costs of agriculture. Additionally, the high rate of human intake of animal proteins and lipids has adversely affected the health of the country's population. Fundamental corrections in German farm policy appear inevitable.