http://localhost:80/xmlui/handle/123456789/19285 Wed, 22 Apr 2026 22:32:27 GMT 2026-04-22T22:32:27Z http://localhost:80/xmlui/handle/123456789/20057 Title: Estimation of Monosodium Glutamate by Modified HPLC Method in Various Pakistani Spices Formula Authors: MEHREEN LATEEF; KAUSER SIDDIQUI; MUHAMMAD SALEEM; LUBNA IQBAL Abstract: The concentration of monosodium glutamate (MSG) was evaluated in ten samples of formulated spices in Pakistan. The samples were analyzed by modified HPLC method after water extraction and derivatization of MSG by dinitrofluorobenzene (DNFB), using reversed phase C18 column, mobile phase was consisted of methanol: water (1:1) followed by UV detection at 254 nm. The standard curve of derivatized MSG of 500, 250 and 125 µg/mL was plotted to determine the quantity of MSG in spices samples. The peak of MSG was identified by comparing it with retention time of MSG standards, that is, 8.6 min. MSG concentration in different samples was in the range of 2.6-7.7%, showing a wide range of added MSG. Glutamate contents in the samples were in the permissible limit established by the European Directive, 95/2/CE. Furthermore, MSG levels in food prepared by the formulated Pakistani spices samples are also less than the largest palatable dose of MSG for humans. Tue, 07 Feb 2012 00:00:00 GMT http://localhost:80/xmlui/handle/123456789/20057 2012-02-07T00:00:00Z http://localhost:80/xmlui/handle/123456789/20056 Title: QuEChERS Extraction for High Performance Liquid Chromatographic Determination of pyrazosulfuron-ethyl in Soils Authors: YANHUI WANG; XIAOMAO ZHOU; LIANGWEI DU; HUIHUA TAN; LIANYANG BAI; DONGQIANG ZENG; HAI TIAN Abstract: This paper described a simplified quick, easy, cheap, effective, rugged and safe (QuEChERS) approach for determination of pyrazosulfuron-ethyl (PE) from soil samples by high performance liquid chromatography/ultraviolet (HPLC/UV) detector. Optimized results were obtained dispersing soil in water, followed by the addition of 1% acetic acid (HOAc) in acetonitrile (MeCN), anhydrous magnesium sulfate (MgSO4) and sodium acetate tri-hydrate (NaOAc·3H2O), which was a modification of QuEChERS method without primary and secondary amine (PSA) and C18 sorbent. The results showed the recovery ranged from 70.8% to 99.0% and 83.5% to 86.4% with the relative standard deviations of 2.1% to 7.9% and 7.0% to 10.0% in Changsha and Nanning soil samples, respectively. The limit of detection (LOD) of the method was 0.05 mg/Kg. The limit of quantification (LOQ) was 0.1 mg/Kg Sun, 05 Feb 2012 00:00:00 GMT http://localhost:80/xmlui/handle/123456789/20056 2012-02-05T00:00:00Z http://localhost:80/xmlui/handle/123456789/20051 Title: Carbon Dioxide Emission from Maize Straw Incubated with Soil under Various Moisture and Nitrogen Levels Authors: SHAUKAT ALI ABRO; XIAOHONG TIAN; QAISAR HUSSAIN; MASHOOQE TALPUR; UMEED SINGH Abstract: A laboratory incubation experiment was conducted to investigate the decomposition of maize straw incorporated into soil amended with nitrogen (N) and moisture (M) levels. Clay loam topsoil amended with maize straw was adjusted to four initial nitrogen treatments (C/N ratios of 72, 36, 18, and 9) and four moisture levels (60%, 70%, 80% and 90 % of field capacity) for the total of 16 treatments and incubated at 20° C for 51 days. CO2-C evolved was regularly recorded for all treatments during entire incubation period. Results showed that the mixing of straw with soil accelerated decomposition rates and enhanced cumulative CO2-C production. The incorporation of straw brought about 50% increase in the cumulative CO2-C production as compared with controls. About 45% of added maize straw C was mineralized to CO2-C in 51 days. We conclude that incorporation of straw into soil along with the addition of N and moisture levels significantly affected CO2-C evolution, cumulative CO2-C, C mineralization and soil organic carbon deposition. The CO2 emission was in positive correlation with (R2 =0.99) N, moisture and incubation time (days). The straw returning into soil may enhance carbon pools and, thus will improve soil and environmental quality. Sat, 04 Feb 2012 00:00:00 GMT http://localhost:80/xmlui/handle/123456789/20051 2012-02-04T00:00:00Z http://localhost:80/xmlui/handle/123456789/20050 Title: Effect of Different Locations, Varieties and Micronaire Values upon the Non-Cellulosic and Metal Contents of Cotton Authors: NASIR MAHMOOD; MUHAMMAD QAMAR TUSIEF; DANISH IQBAL; MAHMOOD AHMED KHAN; WAJID ISHAQUE Abstract: Cotton fibres contain naturally occurring non-cellulosic materials such as sugars, wax, metals and other organic species that may influence fibre characteristics, i.e. physical and chemical properties, yarn processing efficiency as well as product quality. Chemical and physical tests were conducted on raw cottons from different growing areas of Pakistan to determine the effect of different chemical components/materials on fibre properties, spinning performance and yarn properties. The present research study was planned to explore the location’s effect upon the noncellulosic content of raw cotton and its ultimate effect on end product. In this concern four different growing areas (Multan, Bahawalpur, Rahim Yar Khan and Faisalabad), four cotton varieties CIM473, CIM496, NIAB-111 and NIAB-999 with four micronaire values (4.4,4.6, 4.8 and5.0) were analyzed for wax, alcohol extractable, residual sugars, fibre ash contents and light metal content. Determined values were significantly correlated to spinning consistency. Fri, 03 Feb 2012 00:00:00 GMT http://localhost:80/xmlui/handle/123456789/20050 2012-02-03T00:00:00Z