Carlos Alfredo Ugarte Alvan

11 Questions 4 Answers 0 Followers

Questions related from Carlos Alfredo Ugarte Alvan

The calorie referred to in food is actually a kilocalorie?

In the book ‘Basic Principles and Calculations in Chemical Engineering’ by David M. Himmelblau, it is stated that in the context of nutrition, the calorie referred to in food is actually a...

13 October 2024 8,327 4 View

Are there free tools similar to CORMIX for water quality modeling in the EU or other countries?

Hello everyone, I am familiar with the EPA's Cornell Mixing Zone Expert System (CORMIX), which is widely used for environmental impact assessments related to wastewater discharge. CORMIX offers...

05 October 2024 3,817 1 View

In Peru, we often use the EPA’s IRIS for risk assessment. Is there a similar platform in Europe?

I've noticed that in Peru, the Integrated Risk Information System (IRIS) from the EPA is frequently used for risk assessment. Does anyone know if there is a similar platform used in Europe other...

27 September 2024 4,543 1 View

Inquiry on Water Sampling Protocols in River Environments?

Hello everyone, I have a few questions regarding water sampling procedures in river environments, and I was wondering if there are any official protocols, guides, or documents that address these...

26 September 2024 2,479 4 View

When calibrating a pH sensor, should it be immersed directly in the buffer solution or measured in a beaker to avoid contamination?

When calibrating the pH sensor of a multiparameter device, is it advisable to immerse the sensor directly into the buffer solution, or should a portion of the solution be transferred into a beaker...

24 September 2024 9,026 4 View

Why does a multiparameter device take a long time to provide a stable reading when measuring dissolved oxygen? Is this normal?

When using a multiparameter device to measure dissolved oxygen, I’ve noticed that it takes a considerable amount of time for the sensor to stabilize and provide a fixed reading, especially when...

20 September 2024 1,778 3 View

Livres en français sur le bilan matière et énergie selon la norme ISO 14001: 2015 ?

Pouvez-vous me recommander des livres en français sur le bilan matière et énergie appliqué aux processus industriels dans un contexte environnemental selon la norme ISO 14001: 2015 ? Could you...

19 August 2024 8,474 1 View

How should we handle values reported as detection limits in laboratory analyses when performing a PCA?

To perform a Principal Component Analysis (PCA), it is generally necessary to have a dataset collected over several years. However, some laboratory analyses for certain parameters report results...

01 January 1970 2,229 0 View

Understanding PCA: Key Questions on Matrix Dimensions, Central Tendency, and Factor Analysis

1. What should be the dimensions of the matrix in PCA? 2. Should I always use the mean, or can I use the median or another measure of central tendency depending on the distribution? 3. Why are PCA...

01 January 1970 2,915 3 View

Regulatory Restrictions on Discharges into Dry or Intermittent Streams

What regulatory restrictions apply to wastewater discharges into dry or intermittent streams?

01 January 1970 1,250 1 View

Difficulty Understanding the Distinction Between Extensive and Intensive Properties

I am studying David M. Himmelblau's book on material and energy balances, and I'm finding it challenging to intuitively grasp the difference between extensive and intensive properties,...

01 January 1970 4,346 0 View